diff --git a/tools/hdi-gen/ast/ast_array_type.cpp b/tools/hdi-gen/ast/ast_array_type.cpp
index a2a1ec63..38fbd262 100755
--- a/tools/hdi-gen/ast/ast_array_type.cpp
+++ b/tools/hdi-gen/ast/ast_array_type.cpp
@@ -34,29 +34,13 @@ String ASTArrayType::EmitCType(TypeMode mode) const
         case TypeMode::PARAM_IN: {
             if (elementType_->GetTypeKind() == TypeKind::TYPE_STRING) {
                 return String::Format("%s*", elementType_->EmitCType(TypeMode::NO_MODE).string());
-            } else if (elementType_->GetTypeKind() == TypeKind::TYPE_STRUCT
-                || elementType_->GetTypeKind() == TypeKind::TYPE_UNION) {
-                return String::Format("%s", elementType_->EmitCType(TypeMode::PARAM_IN).string());
-            } else {
-                return String::Format("%s*", elementType_->EmitCType(TypeMode::PARAM_IN).string());
-            }
-        }
-        case TypeMode::PARAM_OUT: {
-            if (elementType_->GetTypeKind() == TypeKind::TYPE_STRUCT
-                || elementType_->GetTypeKind() == TypeKind::TYPE_UNION) {
-                return elementType_->EmitCType(TypeMode::PARAM_OUT);
-            } else {
-                return String::Format("%s*", elementType_->EmitCType(TypeMode::PARAM_OUT).string());
-            }
-        }
-        case TypeMode::LOCAL_VAR: {
-            if (elementType_->GetTypeKind() == TypeKind::TYPE_STRUCT
-                || elementType_->GetTypeKind() == TypeKind::TYPE_UNION) {
-                return String::Format("%s", elementType_->EmitCType(TypeMode::LOCAL_VAR).string());
-            } else {
-                return String::Format("%s*", elementType_->EmitCType(TypeMode::LOCAL_VAR).string());
             }
+            return String::Format("const %s*", elementType_->EmitCType(TypeMode::NO_MODE).string());
         }
+        case TypeMode::PARAM_OUT:
+            return String::Format("%s*", elementType_->EmitCType(TypeMode::NO_MODE).string());
+        case TypeMode::LOCAL_VAR:
+            return String::Format("%s*", elementType_->EmitCType(TypeMode::NO_MODE).string());
         default:
             return "unknow type";
     }
@@ -83,15 +67,15 @@ String ASTArrayType::EmitJavaType(TypeMode mode, bool isInnerType) const
     return String::Format("%s[]", elementType_->EmitJavaType(TypeMode::NO_MODE, false).string());
 }
 
-void ASTArrayType::EmitCWriteVar(const String& parcelName, const String& name, const String& gotoLabel,
-    StringBuilder& sb, const String& prefix) const
+void ASTArrayType::EmitCWriteVar(const String& parcelName, const String& name, const String& ecName,
+    const String& gotoLabel, StringBuilder& sb, const String& prefix) const
 {
     String lenName = String::Format("%sLen", name.string());
     sb.Append(prefix).AppendFormat("if (!HdfSbufWriteUint32(%s, %s)) {\n",
         parcelName.string(), lenName.string());
     sb.Append(prefix + g_tab).AppendFormat(
         "HDF_LOGE(\"%%{public}s: write %s failed!\", __func__);\n", name.string());
-    sb.Append(prefix + g_tab).Append("ec = HDF_ERR_INVALID_PARAM;\n");
+    sb.Append(prefix + g_tab).AppendFormat("%s = HDF_ERR_INVALID_PARAM;\n", ecName.string());
     sb.Append(prefix + g_tab).AppendFormat("goto %s;\n", gotoLabel.string());
     sb.Append(prefix).Append("}\n");
 
@@ -109,25 +93,35 @@ void ASTArrayType::EmitCWriteVar(const String& parcelName, const String& name, c
         elementName = String::Format("%s[i]", name.string());
     }
 
-    elementType_->EmitCWriteVar(parcelName, elementName, gotoLabel, sb, prefix + g_tab);
+    elementType_->EmitCWriteVar(parcelName, elementName, ecName, gotoLabel, sb, prefix + g_tab);
+    sb.Append(prefix).Append("}\n");
+}
+
+void ASTArrayType::EmitCProxyWriteOutVar(const String& parcelName, const String& name, const String& ecName,
+    const String& gotoLabel, StringBuilder& sb, const String& prefix) const
+{
+    String lenName = String::Format("*%sLen", name.string());
+    sb.Append(prefix).AppendFormat("if (!HdfSbufWriteUint32(%s, %s)) {\n",
+        parcelName.string(), lenName.string());
+    sb.Append(prefix + g_tab).AppendFormat(
+        "HDF_LOGE(\"%%{public}s: write %s failed!\", __func__);\n", name.string());
+    sb.Append(prefix + g_tab).AppendFormat("%s = HDF_ERR_INVALID_PARAM;\n", ecName.string());
+    sb.Append(prefix + g_tab).AppendFormat("goto %s;\n", gotoLabel.string());
     sb.Append(prefix).Append("}\n");
 }
 
 void ASTArrayType::EmitCProxyReadVar(const String& parcelName, const String& name, bool isInnerType,
-    const String& gotoLabel, StringBuilder& sb, const String& prefix) const
+    const String& ecName, const String& gotoLabel, StringBuilder& sb, const String& prefix) const
 {
     String lenName = String::Format("%sLen", name.string());
     sb.Append(prefix).AppendFormat("if (!HdfSbufReadUint32(%s, %s)) {\n",
         parcelName.string(), lenName.string());
     sb.Append(prefix + g_tab).AppendFormat(
         "HDF_LOGE(\"%%{public}s: read %s size failed!\", __func__);\n", name.string());
-    sb.Append(prefix + g_tab).Append("ec = HDF_ERR_INVALID_PARAM;\n");
+    sb.Append(prefix + g_tab).AppendFormat("%s = HDF_ERR_INVALID_PARAM;\n", ecName.string());
     sb.Append(prefix + g_tab).AppendFormat("goto %s;\n", gotoLabel.string());
     sb.Append(prefix).Append("}\n\n");
 
-    EmitCMallocVar(name, lenName, true, gotoLabel, sb, prefix);
-    sb.Append("\n");
-
     if (Options::GetInstance().DoGenerateKernelCode()) {
         sb.Append(prefix).AppendFormat("for (i = 0; i < *%s; i++) {\n", lenName.string());
     } else {
@@ -135,41 +129,41 @@ void ASTArrayType::EmitCProxyReadVar(const String& parcelName, const String& nam
     }
 
     if (elementType_->GetTypeKind() == TypeKind::TYPE_STRING) {
-        EmitCProxyReadStrElement(parcelName, name, gotoLabel, sb, prefix);
+        EmitCProxyReadStrElement(parcelName, name, ecName, gotoLabel, sb, prefix);
     } else if (elementType_->GetTypeKind() == TypeKind::TYPE_STRUCT) {
-        String element = String::Format("&(*%s)[i]", name.string());
-        elementType_->EmitCProxyReadVar(parcelName, element, true, gotoLabel, sb, prefix + g_tab);
+        String element = String::Format("&%s[i]", name.string());
+        elementType_->EmitCProxyReadVar(parcelName, element, true, ecName, gotoLabel, sb, prefix + g_tab);
     } else if (elementType_->GetTypeKind() == TypeKind::TYPE_UNION) {
-        String element = String::Format("&(*%s)[i]", name.string());
+        String element = String::Format("&%s[i]", name.string());
         String elementCp = String::Format("%sElementCp", name.string());
-        elementType_->EmitCProxyReadVar(parcelName, elementCp, true, gotoLabel, sb, prefix + g_tab);
+        elementType_->EmitCProxyReadVar(parcelName, elementCp, true, ecName, gotoLabel, sb, prefix + g_tab);
         sb.Append(prefix + g_tab).AppendFormat("(void)memcpy_s(%s, sizeof(%s), %s, sizeof(%s));\n",
             element.string(), elementType_->EmitCType().string(), elementCp.string(),
             elementType_->EmitCType().string());
     } else if (elementType_->GetTypeKind() == TypeKind::TYPE_FILEDESCRIPTOR) {
-        String element = String::Format("(*%s)[i]", name.string());
-        elementType_->EmitCProxyReadVar(parcelName, element, true, gotoLabel, sb, prefix + g_tab);
+        String element = String::Format("%s[i]", name.string());
+        elementType_->EmitCProxyReadVar(parcelName, element, true, ecName, gotoLabel, sb, prefix + g_tab);
     } else {
-        String element = String::Format("&(*%s)[i]", name.string());
-        elementType_->EmitCProxyReadVar(parcelName, element, true, gotoLabel, sb, prefix + g_tab);
+        String element = String::Format("&%s[i]", name.string());
+        elementType_->EmitCProxyReadVar(parcelName, element, true, ecName, gotoLabel, sb, prefix + g_tab);
     }
     sb.Append(prefix).Append("}\n");
 }
 
-void ASTArrayType::EmitCStubReadVar(const String& parcelName, const String& name, StringBuilder& sb,
-    const String& prefix) const
+void ASTArrayType::EmitCStubReadVar(const String& parcelName, const String& name, const String& ecName,
+    const String& gotoLabel, StringBuilder& sb, const String& prefix) const
 {
     String lenName = String::Format("%sLen", name.string());
     sb.Append(prefix).AppendFormat("if (!HdfSbufReadUint32(%s, &%s)) {\n",
         parcelName.string(), lenName.string());
     sb.Append(prefix + g_tab).AppendFormat(
         "HDF_LOGE(\"%%{public}s: read %s size failed!\", __func__);\n", name.string());
-    sb.Append(prefix + g_tab).Append("ec = HDF_ERR_INVALID_PARAM;\n");
-    sb.Append(prefix + g_tab).Append("goto errors;\n");
+    sb.Append(prefix + g_tab).AppendFormat("%s = HDF_ERR_INVALID_PARAM;\n", ecName.string());
+    sb.Append(prefix + g_tab).AppendFormat("goto %s;\n", gotoLabel.string());
     sb.Append(prefix).Append("}\n\n");
 
     sb.Append(prefix).AppendFormat("if (%s > 0) {\n", lenName.string());
-    EmitCMallocVar(name, lenName, false, "errors", sb, prefix + g_tab);
+    EmitCMallocVar(name, lenName, false, ecName, gotoLabel, sb, prefix + g_tab);
     sb.Append("\n");
 
     if (Options::GetInstance().DoGenerateKernelCode()) {
@@ -178,28 +172,46 @@ void ASTArrayType::EmitCStubReadVar(const String& parcelName, const String& name
         sb.Append(prefix + g_tab).AppendFormat("for (uint32_t i = 0; i < %s; i++) {\n", lenName.string());
     }
     if (elementType_->GetTypeKind() == TypeKind::TYPE_STRING) {
-        EmitCStubReadStrElement(parcelName, name, sb, prefix);
+        EmitCStubReadStrElement(parcelName, name, ecName, gotoLabel, sb, prefix);
     } else if (elementType_->GetTypeKind() == TypeKind::TYPE_STRUCT) {
         String element = String::Format("&%s[i]", name.string());
-        elementType_->EmitCStubReadVar(parcelName, element, sb, prefix + g_tab + g_tab);
+        elementType_->EmitCStubReadVar(parcelName, element, ecName, gotoLabel, sb, prefix + g_tab + g_tab);
     } else if (elementType_->GetTypeKind() == TypeKind::TYPE_UNION) {
         String element = String::Format("%s[i]", name.string());
         String elementCp = String::Format("%sElementCp", name.string());
-        elementType_->EmitCStubReadVar(parcelName, elementCp, sb, prefix + g_tab + g_tab);
+        elementType_->EmitCStubReadVar(parcelName, elementCp, ecName, gotoLabel, sb, prefix + g_tab + g_tab);
         sb.Append(prefix + g_tab + g_tab).AppendFormat("(void)memcpy_s(&%s, sizeof(%s), %s, sizeof(%s));\n",
             element.string(), elementType_->EmitCType().string(), elementCp.string(),
             elementType_->EmitCType().string());
     } else if (elementType_->GetTypeKind() == TypeKind::TYPE_FILEDESCRIPTOR) {
         String element = String::Format("%s[i]", name.string());
-        elementType_->EmitCStubReadVar(parcelName, element, sb, prefix + g_tab + g_tab);
+        elementType_->EmitCStubReadVar(parcelName, element, ecName, gotoLabel, sb, prefix + g_tab + g_tab);
     } else {
         String element = String::Format("&%s[i]", name.string());
-        elementType_->EmitCStubReadVar(parcelName, element, sb, prefix + g_tab + g_tab);
+        elementType_->EmitCStubReadVar(parcelName, element, ecName, gotoLabel, sb, prefix + g_tab + g_tab);
     }
     sb.Append(prefix + g_tab).Append("}\n");
     sb.Append(prefix).Append("}\n");
 }
 
+void ASTArrayType::EmitCStubReadOutVar(const String& parcelName, const String& name, const String& ecName,
+    const String& gotoLabel, StringBuilder& sb, const String& prefix) const
+{
+    String lenName = String::Format("%sLen", name.string());
+    sb.Append(prefix).AppendFormat("if (!HdfSbufReadUint32(%s, &%s)) {\n",
+        parcelName.string(), lenName.string());
+    sb.Append(prefix + g_tab).AppendFormat(
+        "HDF_LOGE(\"%%{public}s: read %s size failed!\", __func__);\n", name.string());
+    sb.Append(prefix + g_tab).AppendFormat("%s = HDF_ERR_INVALID_PARAM;\n", ecName.string());
+    sb.Append(prefix + g_tab).AppendFormat("goto %s;\n", gotoLabel.string());
+    sb.Append(prefix).Append("}\n\n");
+
+    sb.Append(prefix).AppendFormat("if (%s > 0) {\n", lenName.string());
+    EmitCMallocVar(name, lenName, false, ecName, gotoLabel, sb, prefix + g_tab);
+    sb.Append(prefix).Append("}\n");
+}
+
+
 void ASTArrayType::EmitCppWriteVar(const String& parcelName, const String& name, StringBuilder& sb,
     const String& prefix, unsigned int innerLevel) const
 {
@@ -250,14 +262,14 @@ void ASTArrayType::EmitCMarshalling(const String& name, StringBuilder& sb, const
     sb.Append(prefix).Append("}\n");
 }
 
-void ASTArrayType::EmitCUnMarshalling(const String& name, StringBuilder& sb, const String& prefix,
-    std::vector<String>& freeObjStatements) const
+void ASTArrayType::EmitCUnMarshalling(const String& name, const String& gotoLabel, StringBuilder& sb,
+    const String& prefix, std::vector<String>& freeObjStatements) const
 {
     String lenName = String::Format("%sLen", name.string());
     sb.Append(prefix).AppendFormat("if (!HdfSbufReadUint32(data, &%s)) {\n", lenName.string());
     sb.Append(prefix + g_tab).AppendFormat(
         "HDF_LOGE(\"%%{public}s: read %s failed!\", __func__);\n", lenName.string());
-    sb.Append(prefix + g_tab).Append("goto errors;\n");
+    sb.Append(prefix + g_tab).AppendFormat("goto %s;\n", gotoLabel.string());
     sb.Append(prefix).Append("}\n");
     sb.Append(prefix).AppendFormat("if (%s > 0) {\n", lenName.string());
     String newPrefix = prefix + g_tab;
@@ -265,7 +277,7 @@ void ASTArrayType::EmitCUnMarshalling(const String& name, StringBuilder& sb, con
     sb.Append(newPrefix).AppendFormat("%s = (%s*)OsalMemCalloc(sizeof(%s) * %s);\n",
         name.string(), elementType_->EmitCType().string(), elementType_->EmitCType().string(), lenName.string());
     sb.Append(newPrefix).AppendFormat("if (%s == NULL) {\n", name.string());
-    sb.Append(newPrefix + g_tab).AppendFormat("goto errors;\n");
+    sb.Append(newPrefix + g_tab).AppendFormat("goto %s;\n", gotoLabel.string());
     sb.Append(newPrefix).Append("}\n");
     freeObjStatements.push_back(String::Format("OsalMemFree(%s);\n", name.string()));
 
@@ -276,31 +288,31 @@ void ASTArrayType::EmitCUnMarshalling(const String& name, StringBuilder& sb, con
     }
 
     if (elementType_->GetTypeKind() == TypeKind::TYPE_STRING) {
-        EmitCStringElementUnMarshalling(name, sb, newPrefix, freeObjStatements);
+        EmitCStringElementUnMarshalling(name, gotoLabel, sb, newPrefix, freeObjStatements);
     } else if (elementType_->GetTypeKind() == TypeKind::TYPE_STRUCT) {
         String element = String::Format("&%s[i]", name.string());
-        elementType_->EmitCUnMarshalling(element, sb, newPrefix + g_tab, freeObjStatements);
+        elementType_->EmitCUnMarshalling(element, gotoLabel, sb, newPrefix + g_tab, freeObjStatements);
     } else if (elementType_->GetTypeKind() == TypeKind::TYPE_UNION) {
         String element = String::Format("%s[i]", name.string());
         String elementCp = String::Format("%sElementCp", name.string());
-        elementType_->EmitCUnMarshalling(elementCp, sb, newPrefix + g_tab, freeObjStatements);
+        elementType_->EmitCUnMarshalling(elementCp, gotoLabel, sb, newPrefix + g_tab, freeObjStatements);
         sb.Append(newPrefix + g_tab).AppendFormat("(void)memcpy_s(&%s, sizeof(%s), %s, sizeof(%s));\n",
             element.string(), elementType_->EmitCType().string(), elementCp.string(),
             elementType_->EmitCType().string());
     } else {
         String element = String::Format("%s[i]", name.string());
-        elementType_->EmitCUnMarshalling(element, sb, newPrefix + g_tab, freeObjStatements);
+        elementType_->EmitCUnMarshalling(element, gotoLabel, sb, newPrefix + g_tab, freeObjStatements);
     }
     sb.Append(newPrefix).Append("}\n");
     sb.Append(prefix).Append("}\n");
     freeObjStatements.pop_back();
 }
 
-void ASTArrayType::EmitCStringElementUnMarshalling(const String& name, StringBuilder& sb, const String& newPrefix,
-    std::vector<String>& freeObjStatements) const
+void ASTArrayType::EmitCStringElementUnMarshalling(const String& name, const String& gotoLabel, StringBuilder& sb,
+    const String& newPrefix, std::vector<String>& freeObjStatements) const
 {
     String element = String::Format("%sElement", name.string());
-    elementType_->EmitCUnMarshalling(element, sb, newPrefix + g_tab, freeObjStatements);
+    elementType_->EmitCUnMarshalling(element, gotoLabel, sb, newPrefix + g_tab, freeObjStatements);
     if (Options::GetInstance().DoGenerateKernelCode()) {
         sb.Append(newPrefix).AppendFormat("%s[i] = (char*)OsalMemCalloc(strlen(%s) + 1);\n",
             name.string(), element.string());
@@ -373,7 +385,7 @@ void ASTArrayType::EmitCppUnMarshalling(const String& parcelName, const String&
 void ASTArrayType::EmitMemoryRecycle(const String& name, bool isClient, bool ownership, StringBuilder& sb,
     const String& prefix) const
 {
-    String varName = isClient ? String::Format("*%s", name.string()) : name;
+    String varName = name;
     String lenName = isClient ? String::Format("*%sLen", name.string()) : String::Format("%sLen", name.string());
 
     sb.Append(prefix).AppendFormat("if (%s > 0 && %s != NULL) {\n", lenName.string(), varName.string());
@@ -384,8 +396,7 @@ void ASTArrayType::EmitMemoryRecycle(const String& name, bool isClient, bool own
             sb.Append(prefix + g_tab).AppendFormat("for (uint32_t i = 0; i < %s; i++) {\n", lenName.string());
         }
 
-        String elementName = isClient ? String::Format("(%s)[i]", varName.string()) :
-            String::Format("%s[i]", varName.string());
+        String elementName = String::Format("%s[i]", varName.string());
         elementType_->EmitMemoryRecycle(elementName, false, false, sb, prefix + g_tab + g_tab);
         sb.Append(prefix + g_tab).Append("}\n");
     }
@@ -402,7 +413,7 @@ void ASTArrayType::EmitJavaWriteVar(const String& parcelName, const String& name
     const String& prefix) const
 {
     sb.Append(prefix).AppendFormat("if (%s == null) {\n", name.string());
-    sb.Append(prefix).AppendFormat("    %s.writeInt(-1);\n", parcelName.string());
+    sb.Append(prefix + g_tab).AppendFormat("%s.writeInt(-1);\n", parcelName.string());
     sb.Append(prefix).Append("} else { \n");
     EmitJavaWriteArrayVar(parcelName, name, sb, prefix + g_tab);
     sb.Append(prefix).Append("}\n");
@@ -534,8 +545,8 @@ void ASTArrayType::EmitJavaWriteArrayVar(const String& parcelName, const String&
     }
 }
 
-void ASTArrayType::EmitCMallocVar(const String& name, const String& lenName, bool isClient, const String& gotoLabel,
-    StringBuilder& sb, const String& prefix) const
+void ASTArrayType::EmitCMallocVar(const String& name, const String& lenName, bool isClient, const String& ecName,
+    const String& gotoLabel, StringBuilder& sb, const String& prefix) const
 {
     String varName = isClient ? String::Format("*%s", name.string()) : name;
     String lenVarName = isClient ? String::Format("*%s", lenName.string()) : lenName;
@@ -543,58 +554,62 @@ void ASTArrayType::EmitCMallocVar(const String& name, const String& lenName, boo
     sb.Append(prefix).AppendFormat("%s = (%s*)OsalMemCalloc(sizeof(%s) * (%s));\n", varName.string(),
         elementType_->EmitCType().string(), elementType_->EmitCType().string(), lenVarName.string());
     sb.Append(prefix).AppendFormat("if (%s == NULL) {\n", varName.string());
-    sb.Append(prefix + g_tab).AppendFormat("ec = HDF_ERR_MALLOC_FAIL;\n");
+    sb.Append(prefix + g_tab).AppendFormat("HDF_LOGE(\"%%{public}s: malloc %s failed\", __func__);\n",
+        varName.string());
+    sb.Append(prefix + g_tab).AppendFormat("%s = HDF_ERR_MALLOC_FAIL;\n", ecName.string());
     sb.Append(prefix + g_tab).AppendFormat("goto %s;\n", gotoLabel.string());
-    sb.Append(prefix).AppendFormat("}\n");
+    sb.Append(prefix).Append("}\n");
 }
 
-void ASTArrayType::EmitCProxyReadStrElement(const String& parcelName, const String& name, const String& gotoLabel,
-    StringBuilder& sb, const String& prefix) const
+void ASTArrayType::EmitCProxyReadStrElement(const String& parcelName, const String& name, const String& ecName,
+    const String& gotoLabel, StringBuilder& sb, const String& prefix) const
 {
     String cpName = String::Format("%sCp", name.string());
-        elementType_->EmitCProxyReadVar(parcelName, cpName, true, gotoLabel, sb, prefix + g_tab);
+        elementType_->EmitCProxyReadVar(parcelName, cpName, true, ecName, gotoLabel, sb, prefix + g_tab);
     sb.Append("\n");
     if (Options::GetInstance().DoGenerateKernelCode()) {
-        sb.Append(prefix + g_tab).AppendFormat("(*%s)[i] = (char*)OsalMemCalloc(strlen(%s) + 1);\n",
+        sb.Append(prefix + g_tab).AppendFormat("%s[i] = (char*)OsalMemCalloc(strlen(%s) + 1);\n",
             name.string(), cpName.string());
-        sb.Append(prefix + g_tab).AppendFormat("if ((*%s)[i] == NULL) {\n", name.string());
-        sb.Append(prefix + g_tab + g_tab).Append("ec = HDF_ERR_MALLOC_FAIL;\n");
+        sb.Append(prefix + g_tab).AppendFormat("if (%s[i] == NULL) {\n", name.string());
+        sb.Append(prefix + g_tab + g_tab).AppendFormat("HDF_LOGE(\"%%{public}s: malloc %s[i] failed\", __func__);\n",
+            name.string());
+        sb.Append(prefix + g_tab + g_tab).AppendFormat("%s = HDF_ERR_MALLOC_FAIL;\n", ecName.string());
         sb.Append(prefix + g_tab + g_tab).AppendFormat("goto %s;\n", gotoLabel.string());
         sb.Append(prefix + g_tab).Append("}\n\n");
-        sb.Append(prefix + g_tab).AppendFormat("if (strcpy_s((*%s)[i], (strlen(%s) + 1), %s) != HDF_SUCCESS) {\n",
+        sb.Append(prefix + g_tab).AppendFormat("if (strcpy_s(%s[i], (strlen(%s) + 1), %s) != HDF_SUCCESS) {\n",
             name.string(), cpName.string(), cpName.string());
         sb.Append(prefix + g_tab + g_tab).AppendFormat("HDF_LOGE(\"%%{public}s: read %s failed!\", __func__);\n",
             cpName.string());
-        sb.Append(prefix + g_tab + g_tab).Append("ec = HDF_ERR_INVALID_PARAM;\n");
+        sb.Append(prefix + g_tab + g_tab).AppendFormat("%s = HDF_ERR_INVALID_PARAM;\n", ecName.string());
         sb.Append(prefix + g_tab + g_tab).AppendFormat("goto %s;\n", gotoLabel.string());
         sb.Append(prefix + g_tab).Append("}\n");
     } else {
-        sb.Append(prefix + g_tab).AppendFormat("(*%s)[i] = strdup(%sCp);\n",
+        sb.Append(prefix + g_tab).AppendFormat("%s[i] = strdup(%sCp);\n",
             name.string(), name.string());
     }
 }
 
-void ASTArrayType::EmitCStubReadStrElement(const String& parcelName, const String& name, StringBuilder& sb,
-    const String& prefix) const
+void ASTArrayType::EmitCStubReadStrElement(const String& parcelName, const String& name, const String& ecName,
+    const String& gotoLabel, StringBuilder& sb, const String& prefix) const
 {
     String element = String::Format("%sCp", name.string());
     String newPrefix = prefix + g_tab + g_tab;
-    elementType_->EmitCStubReadVar(parcelName, element, sb, newPrefix);
+    elementType_->EmitCStubReadVar(parcelName, element, ecName, gotoLabel, sb, newPrefix);
     sb.Append("\n");
     if (Options::GetInstance().DoGenerateKernelCode()) {
         sb.Append(newPrefix).AppendFormat("%s[i] = (char*)OsalMemCalloc(strlen(%s) + 1);\n",
             name.string(), element.string());
         sb.Append(newPrefix).AppendFormat("if (%s[i] == NULL) {\n", name.string());
-        sb.Append(newPrefix + g_tab).Append("ec = HDF_ERR_MALLOC_FAIL;\n");
-        sb.Append(newPrefix + g_tab).AppendFormat("goto errors;\n");
+        sb.Append(newPrefix + g_tab).AppendFormat("%s = HDF_ERR_MALLOC_FAIL;\n", ecName.string());
+        sb.Append(newPrefix + g_tab).AppendFormat("goto %s;\n", gotoLabel.string());
         sb.Append(newPrefix).Append("}\n\n");
 
-        sb.Append(newPrefix).AppendFormat("if (strcpy_s((%s)[i], (strlen(%s) + 1), %s) != HDF_SUCCESS) {\n",
+        sb.Append(newPrefix).AppendFormat("if (strcpy_s(%s[i], (strlen(%s) + 1), %s) != HDF_SUCCESS) {\n",
             name.string(), element.string(), element.string());
         sb.Append(newPrefix + g_tab).AppendFormat("HDF_LOGE(\"%%{public}s: read %s failed!\", __func__);\n",
             element.string());
-        sb.Append(newPrefix + g_tab).Append("ec = HDF_ERR_INVALID_PARAM;\n");
-        sb.Append(newPrefix + g_tab).Append("goto errors;\n");
+        sb.Append(newPrefix + g_tab).AppendFormat("%s = HDF_ERR_INVALID_PARAM;\n", ecName.string());
+        sb.Append(newPrefix + g_tab).AppendFormat("goto %s;\n", gotoLabel.string());
         sb.Append(newPrefix).Append("}\n");
     } else {
         sb.Append(newPrefix).AppendFormat("%s[i] = strdup(%sCp);\n", name.string(), name.string());
diff --git a/tools/hdi-gen/ast/ast_array_type.h b/tools/hdi-gen/ast/ast_array_type.h
index 7cc0ffe8..a897c0f1 100755
--- a/tools/hdi-gen/ast/ast_array_type.h
+++ b/tools/hdi-gen/ast/ast_array_type.h
@@ -37,14 +37,20 @@ public:
 
     String EmitJavaType(TypeMode mode, bool isInnerType = false) const override;
 
-    void EmitCWriteVar(const String& parcelName, const String& name, const String& gotoLabel,
-        StringBuilder& sb, const String& prefix) const override;
-
-    void EmitCProxyReadVar(const String& parcelName, const String& name, bool isInnerType,
+    void EmitCWriteVar(const String& parcelName, const String& name, const String& ecName,
         const String& gotoLabel, StringBuilder& sb, const String& prefix) const override;
 
-    void EmitCStubReadVar(const String& parcelName, const String& name, StringBuilder& sb,
-        const String& prefix) const override;
+    void EmitCProxyWriteOutVar(const String& parcelName, const String& name, const String& ecName,
+        const String& gotoLabel, StringBuilder& sb, const String& prefix) const override;
+
+    void EmitCProxyReadVar(const String& parcelName, const String& name, bool isInnerType, const String& ecName,
+        const String& gotoLabel, StringBuilder& sb, const String& prefix) const override;
+
+    void EmitCStubReadVar(const String& parcelName, const String& name, const String& ecName,
+        const String& gotoLabel, StringBuilder& sb, const String& prefix) const override;
+
+    void EmitCStubReadOutVar(const String& parcelName, const String& name, const String& ecName,
+        const String& gotoLabel, StringBuilder& sb, const String& prefix) const override;
 
     void EmitCppWriteVar(const String& parcelName, const String& name, StringBuilder& sb,
         const String& prefix, unsigned int innerLevel = 0) const override;
@@ -54,7 +60,7 @@ public:
 
     void EmitCMarshalling(const String& name, StringBuilder& sb, const String& prefix) const override;
 
-    void EmitCUnMarshalling(const String& name, StringBuilder& sb, const String& prefix,
+    void EmitCUnMarshalling(const String& name, const String& gotoLabel, StringBuilder& sb, const String& prefix,
         std::vector<String>& freeObjStatements) const override;
 
     void EmitCppMarshalling(const String& parcelName, const String& name, StringBuilder& sb,
@@ -78,17 +84,17 @@ private:
     void EmitJavaWriteArrayVar(const String& parcelName, const String& name, StringBuilder& sb,
         const String& prefix) const;
 
-    void EmitCMallocVar(const String& name, const String& lenName, bool isClient, const String& gotoLabel,
-        StringBuilder& sb, const String& prefix) const;
+    void EmitCMallocVar(const String& name, const String& lenName, bool isClient, const String& ecName,
+        const String& gotoLabel, StringBuilder& sb, const String& prefix) const;
 
-    void EmitCProxyReadStrElement(const String& parcelName, const String& name, const String& gotoLabel,
-        StringBuilder& sb, const String& prefix) const;
+    void EmitCProxyReadStrElement(const String& parcelName, const String& name, const String& ecName,
+        const String& gotoLabel, StringBuilder& sb, const String& prefix) const;
 
-    void EmitCStubReadStrElement(const String& parcelName, const String& name, StringBuilder& sb,
-        const String& prefix) const;
+    void EmitCStubReadStrElement(const String& parcelName, const String& name, const String& ecName,
+        const String& gotoLabel, StringBuilder& sb, const String& prefix) const;
 
-    void EmitCStringElementUnMarshalling(const String& name, StringBuilder& sb, const String& newPrefix,
-        std::vector<String>& freeObjStatements) const;
+    void EmitCStringElementUnMarshalling(const String& name, const String& gotoLabel, StringBuilder& sb,
+        const String& newPrefix, std::vector<String>& freeObjStatements) const;
 
     AutoPtr<ASTType> elementType_;
 };
diff --git a/tools/hdi-gen/ast/ast_boolean_type.cpp b/tools/hdi-gen/ast/ast_boolean_type.cpp
index 956854bb..eda2eaf4 100755
--- a/tools/hdi-gen/ast/ast_boolean_type.cpp
+++ b/tools/hdi-gen/ast/ast_boolean_type.cpp
@@ -62,42 +62,42 @@ String ASTBooleanType::EmitJavaType(TypeMode mode, bool isInnerType) const
     return isInnerType ? "Boolean" : "boolean";
 }
 
-void ASTBooleanType::EmitCWriteVar(const String& parcelName, const String& name, const String& gotoLabel,
-    StringBuilder& sb, const String& prefix) const
+void ASTBooleanType::EmitCWriteVar(const String& parcelName, const String& name, const String& ecName,
+    const String& gotoLabel, StringBuilder& sb, const String& prefix) const
 {
     sb.Append(prefix).AppendFormat("if (!HdfSbufWriteInt8(%s, %s ? 1 : 0)) {\n",
         parcelName.string(), name.string());
     sb.Append(prefix + g_tab).AppendFormat(
         "HDF_LOGE(\"%%{public}s: write %s failed!\", __func__);\n", name.string());
-    sb.Append(prefix + g_tab).Append("ec = HDF_ERR_INVALID_PARAM;\n");
+    sb.Append(prefix + g_tab).AppendFormat("%s = HDF_ERR_INVALID_PARAM;\n", ecName.string());
     sb.Append(prefix + g_tab).AppendFormat("goto %s;\n", gotoLabel.string());
     sb.Append(prefix).Append("}\n");
 }
 
 void ASTBooleanType::EmitCProxyReadVar(const String& parcelName, const String& name, bool isInnerType,
+    const String& ecName, const String& gotoLabel, StringBuilder& sb, const String& prefix) const
+{
+    sb.Append(prefix).AppendFormat("if (!HdfSbufReadInt8(%s, (int8_t *)%s)) {\n",
+        parcelName.string(), name.string());
+    sb.Append(prefix + g_tab).AppendFormat(
+        "HDF_LOGE(\"%%{public}s: read %s failed!\", __func__);\n", name.string());
+    sb.Append(prefix + g_tab).AppendFormat("%s = HDF_ERR_INVALID_PARAM;\n", ecName.string());
+    sb.Append(prefix + g_tab).AppendFormat("goto %s;\n", gotoLabel.string());
+    sb.Append(prefix).Append("}\n");
+}
+
+void ASTBooleanType::EmitCStubReadVar(const String& parcelName, const String& name, const String& ecName,
     const String& gotoLabel, StringBuilder& sb, const String& prefix) const
 {
     sb.Append(prefix).AppendFormat("if (!HdfSbufReadInt8(%s, (int8_t *)%s)) {\n",
         parcelName.string(), name.string());
     sb.Append(prefix + g_tab).AppendFormat(
         "HDF_LOGE(\"%%{public}s: read %s failed!\", __func__);\n", name.string());
-    sb.Append(prefix + g_tab).Append("ec = HDF_ERR_INVALID_PARAM;\n");
+    sb.Append(prefix + g_tab).AppendFormat("%s = HDF_ERR_INVALID_PARAM;\n", ecName.string());
     sb.Append(prefix + g_tab).AppendFormat("goto %s;\n", gotoLabel.string());
     sb.Append(prefix).Append("}\n");
 }
 
-void ASTBooleanType::EmitCStubReadVar(const String& parcelName, const String& name, StringBuilder& sb,
-    const String& prefix) const
-{
-    sb.Append(prefix).AppendFormat("if (!HdfSbufReadInt8(%s, (int8_t *)%s)) {\n",
-        parcelName.string(), name.string());
-    sb.Append(prefix + g_tab).AppendFormat(
-        "HDF_LOGE(\"%%{public}s: read %s failed!\", __func__);\n", name.string());
-    sb.Append(prefix + g_tab).Append("ec = HDF_ERR_INVALID_PARAM;\n");
-    sb.Append(prefix + g_tab).Append("goto errors;\n");
-    sb.Append(prefix).Append("}\n");
-}
-
 void ASTBooleanType::EmitCppWriteVar(const String& parcelName, const String& name, StringBuilder& sb,
     const String& prefix, unsigned int innerLevel) const
 {
@@ -129,14 +129,14 @@ void ASTBooleanType::EmitCMarshalling(const String& name, StringBuilder& sb, con
     sb.Append(prefix).Append("}\n");
 }
 
-void ASTBooleanType::EmitCUnMarshalling(const String& name, StringBuilder& sb, const String& prefix,
-    std::vector<String>& freeObjStatements) const
+void ASTBooleanType::EmitCUnMarshalling(const String& name, const String& gotoLabel, StringBuilder& sb,
+    const String& prefix, std::vector<String>& freeObjStatements) const
 {
     sb.Append(prefix).AppendFormat("if (!HdfSbufReadInt8(data, (int8_t *)&%s)) {\n", name.string());
     sb.Append(prefix + g_tab).AppendFormat(
         "HDF_LOGE(\"%%{public}s: read %s failed!\", __func__);\n", name.string());
     EmitFreeStatements(freeObjStatements, sb, prefix + g_tab);
-    sb.Append(prefix + g_tab).Append("goto errors;\n");
+    sb.Append(prefix + g_tab).AppendFormat("goto %s;\n", gotoLabel.string());
     sb.Append(prefix).Append("}\n");
 }
 
diff --git a/tools/hdi-gen/ast/ast_boolean_type.h b/tools/hdi-gen/ast/ast_boolean_type.h
index ebc90802..b376d1ce 100755
--- a/tools/hdi-gen/ast/ast_boolean_type.h
+++ b/tools/hdi-gen/ast/ast_boolean_type.h
@@ -27,14 +27,14 @@ public:
 
     String EmitJavaType(TypeMode mode, bool isInnerType = false) const override;
 
-    void EmitCWriteVar(const String& parcelName, const String& name, const String& gotoLabel,
-        StringBuilder& sb, const String& prefix) const override;
-
-    void EmitCProxyReadVar(const String& parcelName, const String& name, bool isInnerType,
+    void EmitCWriteVar(const String& parcelName, const String& name, const String& ecName,
         const String& gotoLabel, StringBuilder& sb, const String& prefix) const override;
 
-    void EmitCStubReadVar(const String& parcelName, const String& name, StringBuilder& sb,
-        const String& prefix) const override;
+    void EmitCProxyReadVar(const String& parcelName, const String& name, bool isInnerType, const String& ecName,
+        const String& gotoLabel, StringBuilder& sb, const String& prefix) const override;
+
+    void EmitCStubReadVar(const String& parcelName, const String& name, const String& ecName,
+        const String& gotoLabel, StringBuilder& sb, const String& prefix) const override;
 
     void EmitCppWriteVar(const String& parcelName, const String& name, StringBuilder& sb,
         const String& prefix, unsigned int innerLevel = 0) const override;
@@ -44,7 +44,7 @@ public:
 
     void EmitCMarshalling(const String& name, StringBuilder& sb, const String& prefix) const override;
 
-    void EmitCUnMarshalling(const String& name, StringBuilder& sb, const String& prefix,
+    void EmitCUnMarshalling(const String& name, const String& gotoLabel, StringBuilder& sb, const String& prefix,
         std::vector<String>& freeObjStatements) const override;
 
     void EmitCppMarshalling(const String& parcelName, const String& name, StringBuilder& sb,
diff --git a/tools/hdi-gen/ast/ast_byte_type.cpp b/tools/hdi-gen/ast/ast_byte_type.cpp
index fb114c3b..a449449c 100755
--- a/tools/hdi-gen/ast/ast_byte_type.cpp
+++ b/tools/hdi-gen/ast/ast_byte_type.cpp
@@ -62,40 +62,40 @@ String ASTByteType::EmitJavaType(TypeMode mode, bool isInnerType) const
     return isInnerType ? "Byte" : "byte";
 }
 
-void ASTByteType::EmitCWriteVar(const String& parcelName, const String& name, const String& gotoLabel,
-    StringBuilder& sb, const String& prefix) const
+void ASTByteType::EmitCWriteVar(const String& parcelName, const String& name, const String& ecName,
+    const String& gotoLabel, StringBuilder& sb, const String& prefix) const
 {
     sb.Append(prefix).AppendFormat("if (!HdfSbufWriteInt8(%s, %s)) {\n",
         parcelName.string(), name.string());
     sb.Append(prefix + g_tab).AppendFormat(
         "HDF_LOGE(\"%%{public}s: write %s failed!\", __func__);\n", name.string());
-    sb.Append(prefix + g_tab).Append("ec = HDF_ERR_INVALID_PARAM;\n");
+    sb.Append(prefix + g_tab).AppendFormat("%s = HDF_ERR_INVALID_PARAM;\n", ecName.string());
     sb.Append(prefix + g_tab).AppendFormat("goto %s;\n", gotoLabel.string());
     sb.Append(prefix).Append("}\n");
 }
 
 void ASTByteType::EmitCProxyReadVar(const String& parcelName, const String& name, bool isInnerType,
+    const String& ecName, const String& gotoLabel, StringBuilder& sb, const String& prefix) const
+{
+    sb.Append(prefix).AppendFormat("if (!HdfSbufReadInt8(%s, %s)) {\n", parcelName.string(), name.string());
+    sb.Append(prefix + g_tab).AppendFormat(
+        "HDF_LOGE(\"%%{public}s: read %s failed!\", __func__);\n", name.string());
+    sb.Append(prefix + g_tab).AppendFormat("%s = HDF_ERR_INVALID_PARAM;\n", ecName.string());
+    sb.Append(prefix + g_tab).AppendFormat("goto %s;\n", gotoLabel.string());
+    sb.Append(prefix).Append("}\n");
+}
+
+void ASTByteType::EmitCStubReadVar(const String& parcelName, const String& name, const String& ecName,
     const String& gotoLabel, StringBuilder& sb, const String& prefix) const
 {
     sb.Append(prefix).AppendFormat("if (!HdfSbufReadInt8(%s, %s)) {\n", parcelName.string(), name.string());
     sb.Append(prefix + g_tab).AppendFormat(
         "HDF_LOGE(\"%%{public}s: read %s failed!\", __func__);\n", name.string());
-    sb.Append(prefix + g_tab).Append("ec = HDF_ERR_INVALID_PARAM;\n");
+    sb.Append(prefix + g_tab).AppendFormat("%s = HDF_ERR_INVALID_PARAM;\n", ecName.string());
     sb.Append(prefix + g_tab).AppendFormat("goto %s;\n", gotoLabel.string());
     sb.Append(prefix).Append("}\n");
 }
 
-void ASTByteType::EmitCStubReadVar(const String& parcelName, const String& name, StringBuilder& sb,
-    const String& prefix) const
-{
-    sb.Append(prefix).AppendFormat("if (!HdfSbufReadInt8(%s, %s)) {\n", parcelName.string(), name.string());
-    sb.Append(prefix + g_tab).AppendFormat(
-        "HDF_LOGE(\"%%{public}s: read %s failed!\", __func__);\n", name.string());
-    sb.Append(prefix + g_tab).Append("ec = HDF_ERR_INVALID_PARAM;\n");
-    sb.Append(prefix + g_tab).Append("goto errors;\n");
-    sb.Append(prefix).Append("}\n");
-}
-
 void ASTByteType::EmitCppWriteVar(const String& parcelName, const String& name, StringBuilder& sb,
     const String& prefix, unsigned int innerLevel) const
 {
@@ -127,14 +127,14 @@ void ASTByteType::EmitCMarshalling(const String& name, StringBuilder& sb, const
     sb.Append(prefix).Append("}\n");
 }
 
-void ASTByteType::EmitCUnMarshalling(const String& name, StringBuilder& sb, const String& prefix,
-    std::vector<String>& freeObjStatements) const
+void ASTByteType::EmitCUnMarshalling(const String& name, const String& gotoLabel, StringBuilder& sb,
+    const String& prefix, std::vector<String>& freeObjStatements) const
 {
     sb.Append(prefix).AppendFormat("if (!HdfSbufReadInt8(data, &%s)) {\n", name.string());
     sb.Append(prefix + g_tab).AppendFormat(
         "HDF_LOGE(\"%%{public}s: read %s failed!\", __func__);\n", name.string());
     EmitFreeStatements(freeObjStatements, sb, prefix + g_tab);
-    sb.Append(prefix + g_tab).Append("goto errors;\n");
+    sb.Append(prefix + g_tab).AppendFormat("goto %s;\n", gotoLabel.string());
     sb.Append(prefix).Append("}\n");
 }
 
diff --git a/tools/hdi-gen/ast/ast_byte_type.h b/tools/hdi-gen/ast/ast_byte_type.h
index d5b2cda3..6641352d 100755
--- a/tools/hdi-gen/ast/ast_byte_type.h
+++ b/tools/hdi-gen/ast/ast_byte_type.h
@@ -27,14 +27,14 @@ public:
 
     String EmitJavaType(TypeMode mode, bool isInnerType = false) const override;
 
-    void EmitCWriteVar(const String& parcelName, const String& name, const String& gotoLabel,
-        StringBuilder& sb, const String& prefix) const override;
-
-    void EmitCProxyReadVar(const String& parcelName, const String& name, bool isInnerType,
+    void EmitCWriteVar(const String& parcelName, const String& name, const String& ecName,
         const String& gotoLabel, StringBuilder& sb, const String& prefix) const override;
 
-    void EmitCStubReadVar(const String& parcelName, const String& name, StringBuilder& sb,
-        const String& prefix) const override;
+    void EmitCProxyReadVar(const String& parcelName, const String& name, bool isInnerType, const String& ecName,
+        const String& gotoLabel, StringBuilder& sb, const String& prefix) const override;
+
+    void EmitCStubReadVar(const String& parcelName, const String& name, const String& ecName,
+        const String& gotoLabel, StringBuilder& sb, const String& prefix) const override;
 
     void EmitCppWriteVar(const String& parcelName, const String& name, StringBuilder& sb,
         const String& prefix, unsigned int innerLevel = 0) const override;
@@ -44,7 +44,7 @@ public:
 
     void EmitCMarshalling(const String& name, StringBuilder& sb, const String& prefix) const override;
 
-    void EmitCUnMarshalling(const String& name, StringBuilder& sb, const String& prefix,
+    void EmitCUnMarshalling(const String& name, const String& gotoLabel, StringBuilder& sb, const String& prefix,
         std::vector<String>& freeObjStatements) const override;
 
     void EmitCppMarshalling(const String& parcelName, const String& name, StringBuilder& sb,
diff --git a/tools/hdi-gen/ast/ast_double_type.cpp b/tools/hdi-gen/ast/ast_double_type.cpp
index bf6820a4..98e7f4a3 100755
--- a/tools/hdi-gen/ast/ast_double_type.cpp
+++ b/tools/hdi-gen/ast/ast_double_type.cpp
@@ -62,40 +62,40 @@ String ASTDoubleType::EmitJavaType(TypeMode mode, bool isInnerType) const
     return isInnerType ? "Double" : "double";
 }
 
-void ASTDoubleType::EmitCWriteVar(const String& parcelName, const String& name, const String& gotoLabel,
-    StringBuilder& sb, const String& prefix) const
+void ASTDoubleType::EmitCWriteVar(const String& parcelName, const String& name, const String& ecName,
+    const String& gotoLabel, StringBuilder& sb, const String& prefix) const
 {
     sb.Append(prefix).AppendFormat("if (!HdfSbufWriteDouble(%s, %s)) {\n",
         parcelName.string(), name.string());
     sb.Append(prefix + g_tab).AppendFormat(
         "HDF_LOGE(\"%%{public}s: write %s failed!\", __func__);\n", name.string());
-    sb.Append(prefix + g_tab).Append("ec = HDF_ERR_INVALID_PARAM;\n");
+    sb.Append(prefix + g_tab).AppendFormat("%s = HDF_ERR_INVALID_PARAM;\n", ecName.string());
     sb.Append(prefix + g_tab).AppendFormat("goto %s;\n", gotoLabel.string());
     sb.Append(prefix).Append("}\n");
 }
 
 void ASTDoubleType::EmitCProxyReadVar(const String& parcelName, const String& name, bool isInnerType,
+    const String& ecName, const String& gotoLabel, StringBuilder& sb, const String& prefix) const
+{
+    sb.Append(prefix).AppendFormat("if (!HdfSbufReadDouble(%s, %s)) {\n", parcelName.string(), name.string());
+    sb.Append(prefix + g_tab).AppendFormat(
+        "HDF_LOGE(\"%%{public}s: read %s failed!\", __func__);\n", name.string());
+    sb.Append(prefix + g_tab).AppendFormat("%s = HDF_ERR_INVALID_PARAM;\n", ecName.string());
+    sb.Append(prefix + g_tab).AppendFormat("goto %s;\n", gotoLabel.string());
+    sb.Append(prefix).Append("}\n");
+}
+
+void ASTDoubleType::EmitCStubReadVar(const String& parcelName, const String& name, const String& ecName,
     const String& gotoLabel, StringBuilder& sb, const String& prefix) const
 {
     sb.Append(prefix).AppendFormat("if (!HdfSbufReadDouble(%s, %s)) {\n", parcelName.string(), name.string());
     sb.Append(prefix + g_tab).AppendFormat(
         "HDF_LOGE(\"%%{public}s: read %s failed!\", __func__);\n", name.string());
-    sb.Append(prefix + g_tab).Append("ec = HDF_ERR_INVALID_PARAM;\n");
+    sb.Append(prefix + g_tab).AppendFormat("%s = HDF_ERR_INVALID_PARAM;\n", ecName.string());
     sb.Append(prefix + g_tab).AppendFormat("goto %s;\n", gotoLabel.string());
     sb.Append(prefix).Append("}\n");
 }
 
-void ASTDoubleType::EmitCStubReadVar(const String& parcelName, const String& name, StringBuilder& sb,
-    const String& prefix) const
-{
-    sb.Append(prefix).AppendFormat("if (!HdfSbufReadDouble(%s, %s)) {\n", parcelName.string(), name.string());
-    sb.Append(prefix + g_tab).AppendFormat(
-        "HDF_LOGE(\"%%{public}s: read %s failed!\", __func__);\n", name.string());
-    sb.Append(prefix + g_tab).Append("ec = HDF_ERR_INVALID_PARAM;\n");
-    sb.Append(prefix + g_tab).Append("goto errors;\n");
-    sb.Append(prefix).Append("}\n");
-}
-
 void ASTDoubleType::EmitCppWriteVar(const String& parcelName, const String& name, StringBuilder& sb,
     const String& prefix, unsigned int innerLevel) const
 {
@@ -126,14 +126,14 @@ void ASTDoubleType::EmitCMarshalling(const String& name, StringBuilder& sb, cons
     sb.Append(prefix).Append("}\n");
 }
 
-void ASTDoubleType::EmitCUnMarshalling(const String& name, StringBuilder& sb, const String& prefix,
-    std::vector<String>& freeObjStatements) const
+void ASTDoubleType::EmitCUnMarshalling(const String& name, const String& gotoLabel, StringBuilder& sb,
+    const String& prefix, std::vector<String>& freeObjStatements) const
 {
     sb.Append(prefix).AppendFormat("if (!HdfSbufReadDouble(data, &%s)) {\n", name.string());
     sb.Append(prefix + g_tab).AppendFormat(
         "HDF_LOGE(\"%%{public}s: read %s failed!\", __func__);\n", name.string());
     EmitFreeStatements(freeObjStatements, sb, prefix + g_tab);
-    sb.Append(prefix + g_tab).Append("goto errors;\n");
+    sb.Append(prefix + g_tab).AppendFormat("goto %s;\n", gotoLabel.string());
     sb.Append(prefix).Append("}\n");
 }
 
diff --git a/tools/hdi-gen/ast/ast_double_type.h b/tools/hdi-gen/ast/ast_double_type.h
index 545482d8..0819a8ee 100755
--- a/tools/hdi-gen/ast/ast_double_type.h
+++ b/tools/hdi-gen/ast/ast_double_type.h
@@ -27,14 +27,14 @@ public:
 
     String EmitJavaType(TypeMode mode, bool isInnerType = false) const override;
 
-    void EmitCWriteVar(const String& parcelName, const String& name, const String& gotoLabel,
-        StringBuilder& sb, const String& prefix) const override;
-
-    void EmitCProxyReadVar(const String& parcelName, const String& name, bool isInnerType,
+    void EmitCWriteVar(const String& parcelName, const String& name, const String& ecName,
         const String& gotoLabel, StringBuilder& sb, const String& prefix) const override;
 
-    void EmitCStubReadVar(const String& parcelName, const String& name, StringBuilder& sb,
-        const String& prefix) const override;
+    void EmitCProxyReadVar(const String& parcelName, const String& name, bool isInnerType, const String& ecName,
+        const String& gotoLabel, StringBuilder& sb, const String& prefix) const override;
+
+    void EmitCStubReadVar(const String& parcelName, const String& name, const String& ecName,
+        const String& gotoLabel, StringBuilder& sb, const String& prefix) const override;
 
     void EmitCppWriteVar(const String& parcelName, const String& name, StringBuilder& sb,
         const String& prefix, unsigned int innerLevel = 0) const override;
@@ -44,7 +44,7 @@ public:
 
     void EmitCMarshalling(const String& name, StringBuilder& sb, const String& prefix) const override;
 
-    void EmitCUnMarshalling(const String& name, StringBuilder& sb, const String& prefix,
+    void EmitCUnMarshalling(const String& name, const String& gotoLabel, StringBuilder& sb, const String& prefix,
         std::vector<String>& freeObjStatements) const override;
 
     void EmitCppMarshalling(const String& parcelName, const String& name, StringBuilder& sb,
diff --git a/tools/hdi-gen/ast/ast_enum_type.cpp b/tools/hdi-gen/ast/ast_enum_type.cpp
index bca78d25..23d27a7f 100755
--- a/tools/hdi-gen/ast/ast_enum_type.cpp
+++ b/tools/hdi-gen/ast/ast_enum_type.cpp
@@ -161,42 +161,42 @@ String ASTEnumType::EmitJavaTypeDecl() const
     return sb.ToString();
 }
 
-void ASTEnumType::EmitCWriteVar(const String& parcelName, const String& name, const String& gotoLabel,
-    StringBuilder& sb, const String& prefix) const
+void ASTEnumType::EmitCWriteVar(const String& parcelName, const String& name, const String& ecName,
+    const String& gotoLabel, StringBuilder& sb, const String& prefix) const
 {
     sb.Append(prefix).AppendFormat("if (!HdfSbufWriteUint32(%s, (uint32_t)%s)) {\n",
         parcelName.string(), name.string());
     sb.Append(prefix + g_tab).AppendFormat(
         "HDF_LOGE(\"%%{public}s: write %s failed!\", __func__);\n", name.string());
-    sb.Append(prefix + g_tab).Append("ec = HDF_ERR_INVALID_PARAM;\n");
+    sb.Append(prefix + g_tab).AppendFormat("%s = HDF_ERR_INVALID_PARAM;\n", ecName.string());
     sb.Append(prefix + g_tab).AppendFormat("goto %s;\n", gotoLabel.string());
     sb.Append(prefix).Append("}\n");
 }
 
 void ASTEnumType::EmitCProxyReadVar(const String& parcelName, const String& name, bool isInnerType,
+    const String& ecName, const String& gotoLabel, StringBuilder& sb, const String& prefix) const
+{
+    sb.Append(prefix).AppendFormat("if (!HdfSbufReadUint32(%s, (uint32_t*)%s)) {\n",
+        parcelName.string(), name.string());
+    sb.Append(prefix + g_tab).AppendFormat(
+        "HDF_LOGE(\"%%{public}s: read %s failed!\", __func__);\n", name.string());
+    sb.Append(prefix + g_tab).AppendFormat("%s = HDF_ERR_INVALID_PARAM;\n", ecName.string());
+    sb.Append(prefix + g_tab).AppendFormat("goto %s;\n", gotoLabel.string());
+    sb.Append(prefix).Append("}\n");
+}
+
+void ASTEnumType::EmitCStubReadVar(const String& parcelName, const String& name, const String& ecName,
     const String& gotoLabel, StringBuilder& sb, const String& prefix) const
 {
     sb.Append(prefix).AppendFormat("if (!HdfSbufReadUint32(%s, (uint32_t*)%s)) {\n",
         parcelName.string(), name.string());
     sb.Append(prefix + g_tab).AppendFormat(
         "HDF_LOGE(\"%%{public}s: read %s failed!\", __func__);\n", name.string());
-    sb.Append(prefix + g_tab).Append("ec = HDF_ERR_INVALID_PARAM;\n");
+    sb.Append(prefix + g_tab).AppendFormat("%s = HDF_ERR_INVALID_PARAM;\n", ecName.string());
     sb.Append(prefix + g_tab).AppendFormat("goto %s;\n", gotoLabel.string());
     sb.Append(prefix).Append("}\n");
 }
 
-void ASTEnumType::EmitCStubReadVar(const String& parcelName, const String& name, StringBuilder& sb,
-    const String& prefix) const
-{
-    sb.Append(prefix).AppendFormat("if (!HdfSbufReadUint32(%s, (uint32_t*)%s)) {\n",
-        parcelName.string(), name.string());
-    sb.Append(prefix + g_tab).AppendFormat(
-        "HDF_LOGE(\"%%{public}s: read %s failed!\", __func__);\n", name.string());
-    sb.Append(prefix + g_tab).Append("ec = HDF_ERR_INVALID_PARAM;\n");
-    sb.Append(prefix + g_tab).Append("goto errors;\n");
-    sb.Append(prefix).Append("}\n");
-}
-
 void ASTEnumType::EmitCppWriteVar(const String& parcelName, const String& name, StringBuilder& sb,
     const String& prefix, unsigned int innerLevel) const
 {
@@ -229,13 +229,13 @@ void ASTEnumType::EmitCMarshalling(const String& name, StringBuilder& sb, const
     sb.Append(prefix).Append("}\n");
 }
 
-void ASTEnumType::EmitCUnMarshalling(const String& name, StringBuilder& sb, const String& prefix,
-    std::vector<String>& freeObjStatements) const
+void ASTEnumType::EmitCUnMarshalling(const String& name, const String& gotoLabel, StringBuilder& sb,
+    const String& prefix, std::vector<String>& freeObjStatements) const
 {
     sb.Append(prefix).AppendFormat("if (!HdfSbufReadInt32(data, (int32_t*)&%s)) {\n", name.string());
     sb.Append(prefix + g_tab).AppendFormat(
         "HDF_LOGE(\"%%{public}s: read %s failed!\", __func__);\n", name.string());
-    sb.Append(prefix + g_tab).Append("goto errors;\n");
+    sb.Append(prefix + g_tab).AppendFormat("goto %s;\n", gotoLabel.string());
     sb.Append(prefix).Append("}\n");
 }
 
diff --git a/tools/hdi-gen/ast/ast_enum_type.h b/tools/hdi-gen/ast/ast_enum_type.h
index 6f5ebc6d..c21073c7 100755
--- a/tools/hdi-gen/ast/ast_enum_type.h
+++ b/tools/hdi-gen/ast/ast_enum_type.h
@@ -146,14 +146,14 @@ public:
 
     String EmitJavaTypeDecl() const;
 
-    void EmitCWriteVar(const String& parcelName, const String& name, const String& gotoLabel,
-        StringBuilder& sb, const String& prefix) const override;
-
-    void EmitCProxyReadVar(const String& parcelName, const String& name, bool isInnerType,
+    void EmitCWriteVar(const String& parcelName, const String& name, const String& ecName,
         const String& gotoLabel, StringBuilder& sb, const String& prefix) const override;
 
-    void EmitCStubReadVar(const String& parcelName, const String& name, StringBuilder& sb,
-        const String& prefix) const override;
+    void EmitCProxyReadVar(const String& parcelName, const String& name, bool isInnerType, const String& ecName,
+        const String& gotoLabel, StringBuilder& sb, const String& prefix) const override;
+
+    void EmitCStubReadVar(const String& parcelName, const String& name, const String& ecName,
+        const String& gotoLabel, StringBuilder& sb, const String& prefix) const override;
 
     void EmitCppWriteVar(const String& parcelName, const String& name, StringBuilder& sb,
         const String& prefix, unsigned int innerLevel = 0) const override;
@@ -163,7 +163,7 @@ public:
 
     void EmitCMarshalling(const String& name, StringBuilder& sb, const String& prefix) const override;
 
-    void EmitCUnMarshalling(const String& name, StringBuilder& sb, const String& prefix,
+    void EmitCUnMarshalling(const String& name, const String& gotoLabel, StringBuilder& sb, const String& prefix,
         std::vector<String>& freeObjStatements) const override;
 
     void EmitCppMarshalling(const String& parcelName, const String& name, StringBuilder& sb,
diff --git a/tools/hdi-gen/ast/ast_fd_type.cpp b/tools/hdi-gen/ast/ast_fd_type.cpp
index deb7b3e5..79bfd554 100755
--- a/tools/hdi-gen/ast/ast_fd_type.cpp
+++ b/tools/hdi-gen/ast/ast_fd_type.cpp
@@ -62,20 +62,20 @@ String ASTFdType::EmitJavaType(TypeMode mode, bool isInnerType) const
     return isInnerType ? "Integer" : "int";
 }
 
-void ASTFdType::EmitCWriteVar(const String& parcelName, const String& name, const String& gotoLabel,
-    StringBuilder& sb, const String& prefix) const
+void ASTFdType::EmitCWriteVar(const String& parcelName, const String& name, const String& ecName,
+    const String& gotoLabel, StringBuilder& sb, const String& prefix) const
 {
     sb.Append(prefix).AppendFormat("if (!HdfSbufWriteFileDescriptor(%s, %s)) {\n",
         parcelName.string(), name.string());
     sb.Append(prefix + g_tab).AppendFormat(
         "HDF_LOGE(\"%%{public}s: write %s failed!\", __func__);\n", name.string());
-    sb.Append(prefix + g_tab).Append("ec = HDF_ERR_INVALID_PARAM;\n");
+    sb.Append(prefix + g_tab).AppendFormat("%s = HDF_ERR_INVALID_PARAM;\n", ecName.string());
     sb.Append(prefix + g_tab).AppendFormat("goto %s;\n", gotoLabel.string());
     sb.Append(prefix).Append("}\n");
 }
 
 void ASTFdType::EmitCProxyReadVar(const String& parcelName, const String& name, bool isInnerType,
-    const String& gotoLabel, StringBuilder& sb, const String& prefix) const
+    const String& ecName, const String& gotoLabel, StringBuilder& sb, const String& prefix) const
 {
     if (isInnerType) {
         sb.Append(prefix).AppendFormat("%s = HdfSbufReadFileDescriptor(%s);\n",
@@ -88,21 +88,21 @@ void ASTFdType::EmitCProxyReadVar(const String& parcelName, const String& name,
     }
     sb.Append(prefix + g_tab).AppendFormat(
         "HDF_LOGE(\"%%{public}s: read %s failed!\", __func__);\n", name.string());
-    sb.Append(prefix + g_tab).Append("ec = HDF_ERR_INVALID_PARAM;\n");
+    sb.Append(prefix + g_tab).AppendFormat("%s = HDF_ERR_INVALID_PARAM;\n", ecName.string());
     sb.Append(prefix + g_tab).AppendFormat("goto %s;\n", gotoLabel.string());
     sb.Append(prefix).Append("}\n");
 }
 
-void ASTFdType::EmitCStubReadVar(const String& parcelName, const String& name, StringBuilder& sb,
-    const String& prefix) const
+void ASTFdType::EmitCStubReadVar(const String& parcelName, const String& name, const String& ecName,
+    const String& gotoLabel, StringBuilder& sb, const String& prefix) const
 {
     sb.Append(prefix).AppendFormat("%s = HdfSbufReadFileDescriptor(%s);\n",
         name.string(), parcelName.string());
     sb.Append(prefix).AppendFormat("if (%s < 0) {\n", name.string());
     sb.Append(prefix + g_tab).AppendFormat(
         "HDF_LOGE(\"%%{public}s: read %s failed!\", __func__);\n", name.string());
-    sb.Append(prefix + g_tab).Append("ec = HDF_ERR_INVALID_PARAM;\n");
-    sb.Append(prefix + g_tab).Append("goto errors;\n");
+    sb.Append(prefix + g_tab).AppendFormat("%s = HDF_ERR_INVALID_PARAM;\n", ecName.string());
+    sb.Append(prefix + g_tab).AppendFormat("goto %s;\n", gotoLabel.string());
     sb.Append(prefix).Append("}\n");
 }
 
@@ -136,14 +136,14 @@ void ASTFdType::EmitCMarshalling(const String& name, StringBuilder& sb, const St
     sb.Append(prefix).Append("}\n");
 }
 
-void ASTFdType::EmitCUnMarshalling(const String& name, StringBuilder& sb, const String& prefix,
-    std::vector<String>& freeObjStatements) const
+void ASTFdType::EmitCUnMarshalling(const String& name, const String& gotoLabel, StringBuilder& sb,
+    const String& prefix, std::vector<String>& freeObjStatements) const
 {
     sb.Append(prefix).AppendFormat("%s = HdfSbufReadFileDescriptor(data);\n", name.string());
     sb.Append(prefix).AppendFormat("if (%s < 0) {\n", name.string());
     sb.Append(prefix + g_tab).AppendFormat(
         "HDF_LOGE(\"%%{public}s: read %s failed!\", __func__);\n", name.string());
-    sb.Append(prefix + g_tab).Append("goto errors;\n");
+    sb.Append(prefix + g_tab).AppendFormat("goto %s;\n", gotoLabel.string());
     sb.Append(prefix).Append("}\n");
 }
 
diff --git a/tools/hdi-gen/ast/ast_fd_type.h b/tools/hdi-gen/ast/ast_fd_type.h
index ca6eed64..723252e3 100755
--- a/tools/hdi-gen/ast/ast_fd_type.h
+++ b/tools/hdi-gen/ast/ast_fd_type.h
@@ -27,14 +27,14 @@ public:
 
     String EmitJavaType(TypeMode mode, bool isInnerType = false) const override;
 
-    void EmitCWriteVar(const String& parcelName, const String& name, const String& gotoLabel,
-        StringBuilder& sb, const String& prefix) const override;
-
-    void EmitCProxyReadVar(const String& parcelName, const String& name, bool isInnerType,
+    void EmitCWriteVar(const String& parcelName, const String& name, const String& ecName,
         const String& gotoLabel, StringBuilder& sb, const String& prefix) const override;
 
-    void EmitCStubReadVar(const String& parcelName, const String& name, StringBuilder& sb,
-        const String& prefix) const override;
+    void EmitCProxyReadVar(const String& parcelName, const String& name, bool isInnerType, const String& ecName,
+        const String& gotoLabel, StringBuilder& sb, const String& prefix) const override;
+
+    void EmitCStubReadVar(const String& parcelName, const String& name, const String& ecName,
+        const String& gotoLabel, StringBuilder& sb, const String& prefix) const override;
 
     void EmitCppWriteVar(const String& parcelName, const String& name, StringBuilder& sb,
         const String& prefix, unsigned int innerLevel = 0) const override;
@@ -44,7 +44,7 @@ public:
 
     void EmitCMarshalling(const String& name, StringBuilder& sb, const String& prefix) const override;
 
-    void EmitCUnMarshalling(const String& name, StringBuilder& sb, const String& prefix,
+    void EmitCUnMarshalling(const String& name, const String& gotoLabel, StringBuilder& sb, const String& prefix,
         std::vector<String>& freeObjStatements) const override;
 
     void EmitCppMarshalling(const String& parcelName, const String& name, StringBuilder& sb,
diff --git a/tools/hdi-gen/ast/ast_float_type.cpp b/tools/hdi-gen/ast/ast_float_type.cpp
index b4dd4544..d76b61ce 100755
--- a/tools/hdi-gen/ast/ast_float_type.cpp
+++ b/tools/hdi-gen/ast/ast_float_type.cpp
@@ -62,40 +62,40 @@ String ASTFloatType::EmitJavaType(TypeMode mode, bool isInnerType) const
     return isInnerType ? "Float" : "float";
 }
 
-void ASTFloatType::EmitCWriteVar(const String& parcelName, const String& name, const String& gotoLabel,
-    StringBuilder& sb, const String& prefix) const
+void ASTFloatType::EmitCWriteVar(const String& parcelName, const String& name, const String& ecName,
+    const String& gotoLabel, StringBuilder& sb, const String& prefix) const
 {
     sb.Append(prefix).AppendFormat("if (!HdfSbufWriteFloat(%s, %s)) {\n",
         parcelName.string(), name.string());
     sb.Append(prefix + g_tab).AppendFormat(
         "HDF_LOGE(\"%%{public}s: write %s failed!\", __func__);\n", name.string());
-    sb.Append(prefix + g_tab).Append("ec = HDF_ERR_INVALID_PARAM;\n");
+    sb.Append(prefix + g_tab).AppendFormat("%s = HDF_ERR_INVALID_PARAM;\n", ecName.string());
     sb.Append(prefix + g_tab).AppendFormat("goto %s;\n", gotoLabel.string());
     sb.Append(prefix).Append("}\n");
 }
 
 void ASTFloatType::EmitCProxyReadVar(const String& parcelName, const String& name, bool isInnerType,
+    const String& ecName, const String& gotoLabel, StringBuilder& sb, const String& prefix) const
+{
+    sb.Append(prefix).AppendFormat("if (!HdfSbufReadFloat(%s, %s)) {\n", parcelName.string(), name.string());
+    sb.Append(prefix + g_tab).AppendFormat(
+        "HDF_LOGE(\"%%{public}s: read %s failed!\", __func__);\n", name.string());
+    sb.Append(prefix + g_tab).AppendFormat("%s = HDF_ERR_INVALID_PARAM;\n", ecName.string());
+    sb.Append(prefix + g_tab).AppendFormat("goto %s;\n", gotoLabel.string());
+    sb.Append(prefix).Append("}\n");
+}
+
+void ASTFloatType::EmitCStubReadVar(const String& parcelName, const String& name, const String& ecName,
     const String& gotoLabel, StringBuilder& sb, const String& prefix) const
 {
     sb.Append(prefix).AppendFormat("if (!HdfSbufReadFloat(%s, %s)) {\n", parcelName.string(), name.string());
     sb.Append(prefix + g_tab).AppendFormat(
         "HDF_LOGE(\"%%{public}s: read %s failed!\", __func__);\n", name.string());
-    sb.Append(prefix + g_tab).Append("ec = HDF_ERR_INVALID_PARAM;\n");
+    sb.Append(prefix + g_tab).AppendFormat("%s = HDF_ERR_INVALID_PARAM;\n", ecName.string());
     sb.Append(prefix + g_tab).AppendFormat("goto %s;\n", gotoLabel.string());
     sb.Append(prefix).Append("}\n");
 }
 
-void ASTFloatType::EmitCStubReadVar(const String& parcelName, const String& name, StringBuilder& sb,
-    const String& prefix) const
-{
-    sb.Append(prefix).AppendFormat("if (!HdfSbufReadFloat(%s, %s)) {\n", parcelName.string(), name.string());
-    sb.Append(prefix + g_tab).AppendFormat(
-        "HDF_LOGE(\"%%{public}s: read %s failed!\", __func__);\n", name.string());
-    sb.Append(prefix + g_tab).Append("ec = HDF_ERR_INVALID_PARAM;\n");
-    sb.Append(prefix + g_tab).Append("goto errors;\n");
-    sb.Append(prefix).Append("}\n");
-}
-
 void ASTFloatType::EmitCppWriteVar(const String& parcelName, const String& name, StringBuilder& sb,
     const String& prefix, unsigned int innerLevel) const
 {
@@ -126,14 +126,14 @@ void ASTFloatType::EmitCMarshalling(const String& name, StringBuilder& sb, const
     sb.Append(prefix).Append("}\n");
 }
 
-void ASTFloatType::EmitCUnMarshalling(const String& name, StringBuilder& sb, const String& prefix,
-    std::vector<String>& freeObjStatements) const
+void ASTFloatType::EmitCUnMarshalling(const String& name, const String& gotoLabel, StringBuilder& sb,
+    const String& prefix, std::vector<String>& freeObjStatements) const
 {
     sb.Append(prefix).AppendFormat("if (!HdfSbufReadFloat(data, &%s)) {\n", name.string());
     sb.Append(prefix + g_tab).AppendFormat(
         "HDF_LOGE(\"%%{public}s: read %s failed!\", __func__);\n", name.string());
     EmitFreeStatements(freeObjStatements, sb, prefix + g_tab);
-    sb.Append(prefix + g_tab).Append("goto errors;\n");
+    sb.Append(prefix + g_tab).AppendFormat("goto %s;\n", gotoLabel.string());
     sb.Append(prefix).Append("}\n");
 }
 
diff --git a/tools/hdi-gen/ast/ast_float_type.h b/tools/hdi-gen/ast/ast_float_type.h
index cb0b07f5..c8fadc35 100755
--- a/tools/hdi-gen/ast/ast_float_type.h
+++ b/tools/hdi-gen/ast/ast_float_type.h
@@ -27,14 +27,14 @@ public:
 
     String EmitJavaType(TypeMode mode, bool isInnerType = false) const override;
 
-    void EmitCWriteVar(const String& parcelName, const String& name, const String& gotoLabel,
-        StringBuilder& sb, const String& prefix) const override;
-
-    void EmitCProxyReadVar(const String& parcelName, const String& name, bool isInnerType,
+    void EmitCWriteVar(const String& parcelName, const String& name, const String& ecName,
         const String& gotoLabel, StringBuilder& sb, const String& prefix) const override;
 
-    void EmitCStubReadVar(const String& parcelName, const String& name, StringBuilder& sb,
-        const String& prefix) const override;
+    void EmitCProxyReadVar(const String& parcelName, const String& name, bool isInnerType, const String& ecName,
+        const String& gotoLabel, StringBuilder& sb, const String& prefix) const override;
+
+    void EmitCStubReadVar(const String& parcelName, const String& name, const String& ecName,
+        const String& gotoLabel, StringBuilder& sb, const String& prefix) const override;
 
     void EmitCppWriteVar(const String& parcelName, const String& name, StringBuilder& sb,
         const String& prefix, unsigned int innerLevel = 0) const override;
@@ -44,7 +44,7 @@ public:
 
     void EmitCMarshalling(const String& name, StringBuilder& sb, const String& prefix) const override;
 
-    void EmitCUnMarshalling(const String& name, StringBuilder& sb, const String& prefix,
+    void EmitCUnMarshalling(const String& name, const String& gotoLabel, StringBuilder& sb, const String& prefix,
         std::vector<String>& freeObjStatements) const override;
 
     void EmitCppMarshalling(const String& parcelName, const String& name, StringBuilder& sb,
diff --git a/tools/hdi-gen/ast/ast_integer_type.cpp b/tools/hdi-gen/ast/ast_integer_type.cpp
index 62d19751..fa46b79a 100755
--- a/tools/hdi-gen/ast/ast_integer_type.cpp
+++ b/tools/hdi-gen/ast/ast_integer_type.cpp
@@ -62,40 +62,40 @@ String ASTIntegerType::EmitJavaType(TypeMode mode, bool isInnerType) const
     return isInnerType ? "Integer" : "int";
 }
 
-void ASTIntegerType::EmitCWriteVar(const String& parcelName, const String& name, const String& gotoLabel,
-    StringBuilder& sb, const String& prefix) const
+void ASTIntegerType::EmitCWriteVar(const String& parcelName, const String& name, const String& ecName,
+    const String& gotoLabel, StringBuilder& sb, const String& prefix) const
 {
     sb.Append(prefix).AppendFormat("if (!HdfSbufWriteInt32(%s, %s)) {\n",
         parcelName.string(), name.string());
     sb.Append(prefix + g_tab).AppendFormat(
         "HDF_LOGE(\"%%{public}s: write %s failed!\", __func__);\n", name.string());
-    sb.Append(prefix + g_tab).Append("ec = HDF_ERR_INVALID_PARAM;\n");
+    sb.Append(prefix + g_tab).AppendFormat("%s = HDF_ERR_INVALID_PARAM;\n", ecName.string());
     sb.Append(prefix + g_tab).AppendFormat("goto %s;\n", gotoLabel.string());
     sb.Append(prefix).Append("}\n");
 }
 
 void ASTIntegerType::EmitCProxyReadVar(const String& parcelName, const String& name, bool isInnerType,
+    const String& ecName, const String& gotoLabel, StringBuilder& sb, const String& prefix) const
+{
+    sb.Append(prefix).AppendFormat("if (!HdfSbufReadInt32(%s, %s)) {\n", parcelName.string(), name.string());
+    sb.Append(prefix + g_tab).AppendFormat(
+        "HDF_LOGE(\"%%{public}s: read %s failed!\", __func__);\n", name.string());
+    sb.Append(prefix + g_tab).AppendFormat("%s = HDF_ERR_INVALID_PARAM;\n", ecName.string());
+    sb.Append(prefix + g_tab).AppendFormat("goto %s;\n", gotoLabel.string());
+    sb.Append(prefix).Append("}\n");
+}
+
+void ASTIntegerType::EmitCStubReadVar(const String& parcelName, const String& name, const String& ecName,
     const String& gotoLabel, StringBuilder& sb, const String& prefix) const
 {
     sb.Append(prefix).AppendFormat("if (!HdfSbufReadInt32(%s, %s)) {\n", parcelName.string(), name.string());
     sb.Append(prefix + g_tab).AppendFormat(
         "HDF_LOGE(\"%%{public}s: read %s failed!\", __func__);\n", name.string());
-    sb.Append(prefix + g_tab).Append("ec = HDF_ERR_INVALID_PARAM;\n");
+    sb.Append(prefix + g_tab).AppendFormat("%s = HDF_ERR_INVALID_PARAM;\n", ecName.string());
     sb.Append(prefix + g_tab).AppendFormat("goto %s;\n", gotoLabel.string());
     sb.Append(prefix).Append("}\n");
 }
 
-void ASTIntegerType::EmitCStubReadVar(const String& parcelName, const String& name, StringBuilder& sb,
-    const String& prefix) const
-{
-    sb.Append(prefix).AppendFormat("if (!HdfSbufReadInt32(%s, %s)) {\n", parcelName.string(), name.string());
-    sb.Append(prefix + g_tab).AppendFormat(
-        "HDF_LOGE(\"%%{public}s: read %s failed!\", __func__);\n", name.string());
-    sb.Append(prefix + g_tab).Append("ec = HDF_ERR_INVALID_PARAM;\n");
-    sb.Append(prefix + g_tab).Append("goto errors;\n");
-    sb.Append(prefix).Append("}\n");
-}
-
 void ASTIntegerType::EmitCppWriteVar(const String& parcelName, const String& name, StringBuilder& sb,
     const String& prefix, unsigned int innerLevel) const
 {
@@ -126,14 +126,14 @@ void ASTIntegerType::EmitCMarshalling(const String& name, StringBuilder& sb, con
     sb.Append(prefix).Append("}\n");
 }
 
-void ASTIntegerType::EmitCUnMarshalling(const String& name, StringBuilder& sb, const String& prefix,
-    std::vector<String>& freeObjStatements) const
+void ASTIntegerType::EmitCUnMarshalling(const String& name, const String& gotoLabel, StringBuilder& sb,
+    const String& prefix, std::vector<String>& freeObjStatements) const
 {
     sb.Append(prefix).AppendFormat("if (!HdfSbufReadInt32(data, &%s)) {\n", name.string());
     sb.Append(prefix + g_tab).AppendFormat(
         "HDF_LOGE(\"%%{public}s: read %s failed!\", __func__);\n", name.string());
     EmitFreeStatements(freeObjStatements, sb, prefix + g_tab);
-    sb.Append(prefix + g_tab).Append("goto errors;\n");
+    sb.Append(prefix + g_tab).AppendFormat("goto %s;\n", gotoLabel.string());
     sb.Append(prefix).Append("}\n");
 }
 
diff --git a/tools/hdi-gen/ast/ast_integer_type.h b/tools/hdi-gen/ast/ast_integer_type.h
index 5ed7723b..0c9c7208 100755
--- a/tools/hdi-gen/ast/ast_integer_type.h
+++ b/tools/hdi-gen/ast/ast_integer_type.h
@@ -27,14 +27,14 @@ public:
 
     String EmitJavaType(TypeMode mode, bool isInnerType = false) const override;
 
-    void EmitCWriteVar(const String& parcelName, const String& name, const String& gotoLabel,
-        StringBuilder& sb, const String& prefix) const override;
-
-    void EmitCProxyReadVar(const String& parcelName, const String& name, bool isInnerType,
+    void EmitCWriteVar(const String& parcelName, const String& name, const String& ecName,
         const String& gotoLabel, StringBuilder& sb, const String& prefix) const override;
 
-    void EmitCStubReadVar(const String& parcelName, const String& name, StringBuilder& sb,
-        const String& prefix) const override;
+    void EmitCProxyReadVar(const String& parcelName, const String& name, bool isInnerType, const String& ecName,
+        const String& gotoLabel, StringBuilder& sb, const String& prefix) const override;
+
+    void EmitCStubReadVar(const String& parcelName, const String& name, const String& ecName,
+        const String& gotoLabel, StringBuilder& sb, const String& prefix) const override;
 
     void EmitCppWriteVar(const String& parcelName, const String& name, StringBuilder& sb,
         const String& prefix, unsigned int innerLevel = 0) const override;
@@ -44,7 +44,7 @@ public:
 
     void EmitCMarshalling(const String& name, StringBuilder& sb, const String& prefix) const override;
 
-    void EmitCUnMarshalling(const String& name, StringBuilder& sb, const String& prefix,
+    void EmitCUnMarshalling(const String& name, const String& gotoLabel, StringBuilder& sb, const String& prefix,
         std::vector<String>& freeObjStatements) const override;
 
     void EmitCppMarshalling(const String& parcelName, const String& name, StringBuilder& sb,
diff --git a/tools/hdi-gen/ast/ast_interface_type.cpp b/tools/hdi-gen/ast/ast_interface_type.cpp
index 79adb8a1..5db83ea2 100755
--- a/tools/hdi-gen/ast/ast_interface_type.cpp
+++ b/tools/hdi-gen/ast/ast_interface_type.cpp
@@ -129,31 +129,31 @@ String ASTInterfaceType::EmitJavaType(TypeMode mode, bool isInnerType) const
     return name_;
 }
 
-void ASTInterfaceType::EmitCWriteVar(const String& parcelName, const String& name, const String& gotoLabel,
-    StringBuilder& sb, const String& prefix) const
+void ASTInterfaceType::EmitCWriteVar(const String& parcelName, const String& name, const String& ecName,
+    const String& gotoLabel, StringBuilder& sb, const String& prefix) const
 {
-    sb.Append(prefix).AppendFormat("if (HdfSBufWriteRemoteService(%s, %s->AsObject(%s)) != 0) {\n",
+    sb.Append(prefix).AppendFormat("if (HdfSbufWriteRemoteService(%s, %s->AsObject(%s)) != 0) {\n",
         parcelName.string(), name.string(), name.string());
     sb.Append(prefix + g_tab).AppendFormat(
         "HDF_LOGE(\"%%{public}s: write %s failed!\", __func__);\n", name.string());
-    sb.Append(prefix + g_tab).Append("ec = HDF_ERR_INVALID_PARAM;\n");
+    sb.Append(prefix + g_tab).AppendFormat("%s = HDF_ERR_INVALID_PARAM;\n", ecName.string());
     sb.Append(prefix + g_tab).AppendFormat("goto %s;\n", gotoLabel.string());
     sb.Append(prefix).Append("}\n");
 }
 
-void ASTInterfaceType::EmitCStubReadVar(const String& parcelName, const String& name, StringBuilder& sb,
-    const String& prefix) const
+void ASTInterfaceType::EmitCStubReadVar(const String& parcelName, const String& name, const String& ecName,
+    const String& gotoLabel, StringBuilder& sb, const String& prefix) const
 {
     String remoteName = String::Format("%sRemote", name.string());
     String miName = name_.StartsWith("I") ? name_.Substring(1) : name_;
 
-    sb.Append(prefix).AppendFormat("struct HdfRemoteService *%s = HdfSBufReadRemoteService(%s);\n",
+    sb.Append(prefix).AppendFormat("struct HdfRemoteService *%s = HdfSbufReadRemoteService(%s);\n",
         remoteName.string(), parcelName.string());
     sb.Append(prefix).AppendFormat("if (%s == NULL) {\n", remoteName.string());
     sb.Append(prefix + g_tab).AppendFormat(
         "HDF_LOGE(\"%%{public}s: read %s failed!\", __func__);\n", remoteName.string());
-    sb.Append(prefix + g_tab).Append("ec = HDF_ERR_INVALID_PARAM;\n");
-    sb.Append(prefix + g_tab).Append("goto errors;\n");
+    sb.Append(prefix + g_tab).AppendFormat("%s = HDF_ERR_INVALID_PARAM;\n", ecName.string());
+    sb.Append(prefix + g_tab).AppendFormat("goto %s;\n", gotoLabel.string());
     sb.Append(prefix).Append("}\n");
     sb.Append(prefix).AppendFormat("%s = %sGet(%s);\n",
         name.string(), miName.string(), remoteName.string());
diff --git a/tools/hdi-gen/ast/ast_interface_type.h b/tools/hdi-gen/ast/ast_interface_type.h
index 70870730..08fbb295 100755
--- a/tools/hdi-gen/ast/ast_interface_type.h
+++ b/tools/hdi-gen/ast/ast_interface_type.h
@@ -105,11 +105,11 @@ public:
 
     String EmitJavaType(TypeMode mode, bool isInnerType = false) const override;
 
-    void EmitCWriteVar(const String& parcelName, const String& name, const String& gotoLabel,
-        StringBuilder& sb, const String& prefix) const override;
+    void EmitCWriteVar(const String& parcelName, const String& name, const String& ecName,
+        const String& gotoLabel, StringBuilder& sb, const String& prefix) const override;
 
-    void EmitCStubReadVar(const String& parcelName, const String& name, StringBuilder& sb,
-        const String& prefix) const override;
+    void EmitCStubReadVar(const String& parcelName, const String& name, const String& ecName,
+        const String& gotoLabel, StringBuilder& sb, const String& prefix) const override;
 
     void EmitCppWriteVar(const String& parcelName, const String& name, StringBuilder& sb,
         const String& prefix, unsigned int innerLevel = 0) const override;
diff --git a/tools/hdi-gen/ast/ast_list_type.cpp b/tools/hdi-gen/ast/ast_list_type.cpp
index e8ce1aeb..f515a080 100755
--- a/tools/hdi-gen/ast/ast_list_type.cpp
+++ b/tools/hdi-gen/ast/ast_list_type.cpp
@@ -34,29 +34,13 @@ String ASTListType::EmitCType(TypeMode mode) const
         case TypeMode::PARAM_IN: {
             if (elementType_->GetTypeKind() == TypeKind::TYPE_STRING) {
                 return String::Format("%s*", elementType_->EmitCType(TypeMode::NO_MODE).string());
-            } else if (elementType_->GetTypeKind() == TypeKind::TYPE_STRUCT
-                || elementType_->GetTypeKind() == TypeKind::TYPE_UNION) {
-                return String::Format("%s", elementType_->EmitCType(TypeMode::PARAM_IN).string());
-            } else {
-                return String::Format("%s*", elementType_->EmitCType(TypeMode::PARAM_IN).string());
-            }
-        }
-        case TypeMode::PARAM_OUT: {
-            if (elementType_->GetTypeKind() == TypeKind::TYPE_STRUCT
-                || elementType_->GetTypeKind() == TypeKind::TYPE_UNION) {
-                return elementType_->EmitCType(TypeMode::PARAM_OUT);
-            } else {
-                return String::Format("%s*", elementType_->EmitCType(TypeMode::PARAM_OUT).string());
-            }
-        }
-        case TypeMode::LOCAL_VAR: {
-            if (elementType_->GetTypeKind() == TypeKind::TYPE_STRUCT
-                || elementType_->GetTypeKind() == TypeKind::TYPE_UNION) {
-                return String::Format("%s", elementType_->EmitCType(TypeMode::LOCAL_VAR).string());
-            } else {
-                return String::Format("%s*", elementType_->EmitCType(TypeMode::LOCAL_VAR).string());
             }
+            return String::Format("const %s*", elementType_->EmitCType(TypeMode::NO_MODE).string());
         }
+        case TypeMode::PARAM_OUT:
+            return String::Format("%s*", elementType_->EmitCType(TypeMode::NO_MODE).string());
+        case TypeMode::LOCAL_VAR:
+            return String::Format("%s*", elementType_->EmitCType(TypeMode::NO_MODE).string());
         default:
             return "unknow type";
     }
@@ -83,15 +67,15 @@ String ASTListType::EmitJavaType(TypeMode mode, bool isInnerType) const
     return String::Format("List<%s>", elementType_->EmitJavaType(mode, true).string());
 }
 
-void ASTListType::EmitCWriteVar(const String& parcelName, const String& name, const String& gotoLabel,
-    StringBuilder& sb, const String& prefix) const
+void ASTListType::EmitCWriteVar(const String& parcelName, const String& name, const String& ecName,
+    const String& gotoLabel, StringBuilder& sb, const String& prefix) const
 {
     String lenName = String::Format("%sLen", name.string());
     sb.Append(prefix).AppendFormat("if (!HdfSbufWriteUint32(%s, %s)) {\n",
         parcelName.string(), lenName.string());
     sb.Append(prefix + g_tab).AppendFormat(
         "HDF_LOGE(\"%%{public}s: write %s failed!\", __func__);\n", name.string());
-    sb.Append(prefix + g_tab).Append("ec = HDF_ERR_INVALID_PARAM;\n");
+    sb.Append(prefix + g_tab).AppendFormat("%s = HDF_ERR_INVALID_PARAM;\n", ecName.string());
     sb.Append(prefix + g_tab).AppendFormat("goto %s;\n", gotoLabel.string());
     sb.Append(prefix).Append("}\n");
 
@@ -109,25 +93,35 @@ void ASTListType::EmitCWriteVar(const String& parcelName, const String& name, co
         elementName = String::Format("%s[i]", name.string());
     }
 
-    elementType_->EmitCWriteVar(parcelName, elementName, gotoLabel, sb, prefix + g_tab);
+    elementType_->EmitCWriteVar(parcelName, elementName, ecName.string(), gotoLabel, sb, prefix + g_tab);
+    sb.Append(prefix).Append("}\n");
+}
+
+void ASTListType::EmitCProxyWriteOutVar(const String& parcelName, const String& name, const String& ecName,
+    const String& gotoLabel, StringBuilder& sb, const String& prefix) const
+{
+    String lenName = String::Format("*%sLen", name.string());
+    sb.Append(prefix).AppendFormat("if (!HdfSbufWriteUint32(%s, %s)) {\n",
+        parcelName.string(), lenName.string());
+    sb.Append(prefix + g_tab).AppendFormat(
+        "HDF_LOGE(\"%%{public}s: write %s failed!\", __func__);\n", name.string());
+    sb.Append(prefix + g_tab).AppendFormat("%s = HDF_ERR_INVALID_PARAM;\n", ecName.string());
+    sb.Append(prefix + g_tab).AppendFormat("goto %s;\n", gotoLabel.string());
     sb.Append(prefix).Append("}\n");
 }
 
 void ASTListType::EmitCProxyReadVar(const String& parcelName, const String& name, bool isInnerType,
-    const String& gotoLabel, StringBuilder& sb, const String& prefix) const
+    const String& ecName, const String& gotoLabel, StringBuilder& sb, const String& prefix) const
 {
     String lenName = String::Format("%sLen", name.string());
     sb.Append(prefix).AppendFormat("if (!HdfSbufReadUint32(%s, %s)) {\n",
         parcelName.string(), lenName.string());
     sb.Append(prefix + g_tab).AppendFormat(
         "HDF_LOGE(\"%%{public}s: read %s size failed!\", __func__);\n", name.string());
-    sb.Append(prefix + g_tab).Append("ec = HDF_ERR_INVALID_PARAM;\n");
+    sb.Append(prefix + g_tab).AppendFormat("%s = HDF_ERR_INVALID_PARAM;\n", ecName.string());
     sb.Append(prefix + g_tab).AppendFormat("goto %s;\n", gotoLabel.string());
     sb.Append(prefix).Append("}\n\n");
 
-    EmitCMallocVar(name, lenName, true, gotoLabel, sb, prefix);
-    sb.Append("\n");
-
     if (Options::GetInstance().DoGenerateKernelCode()) {
         sb.Append(prefix).AppendFormat("for (i = 0; i < *%s; i++) {\n", lenName.string());
     } else {
@@ -135,29 +129,29 @@ void ASTListType::EmitCProxyReadVar(const String& parcelName, const String& name
     }
 
     if (elementType_->GetTypeKind() == TypeKind::TYPE_STRING) {
-        EmitCProxyReadStrElement(parcelName, name, gotoLabel, sb, prefix);
+        EmitCProxyReadStrElement(parcelName, name, ecName, gotoLabel, sb, prefix);
     } else if (elementType_->GetTypeKind() == TypeKind::TYPE_STRUCT) {
-        String element = String::Format("&(*%s)[i]", name.string());
-        elementType_->EmitCProxyReadVar(parcelName, element, true, gotoLabel, sb, prefix + g_tab);
+        String element = String::Format("&%s[i]", name.string());
+        elementType_->EmitCProxyReadVar(parcelName, element, true, ecName, gotoLabel, sb, prefix + g_tab);
     } else if (elementType_->GetTypeKind() == TypeKind::TYPE_UNION) {
-        String element = String::Format("&(*%s)[i]", name.string());
+        String element = String::Format("&%s[i]", name.string());
         String elementCp = String::Format("%sElementCp", name.string());
-        elementType_->EmitCProxyReadVar(parcelName, elementCp, true, gotoLabel, sb, prefix + g_tab);
+        elementType_->EmitCProxyReadVar(parcelName, elementCp, true, ecName, gotoLabel, sb, prefix + g_tab);
         sb.Append(prefix + g_tab).AppendFormat("(void)memcpy_s(%s, sizeof(%s), %s, sizeof(%s));\n",
             element.string(), elementType_->EmitCType().string(), elementCp.string(),
             elementType_->EmitCType().string());
     } else if (elementType_->GetTypeKind() == TypeKind::TYPE_FILEDESCRIPTOR) {
-        String element = String::Format("(*%s)[i]", name.string());
-        elementType_->EmitCProxyReadVar(parcelName, element, true, gotoLabel, sb, prefix + g_tab);
+        String element = String::Format("%s[i]", name.string());
+        elementType_->EmitCProxyReadVar(parcelName, element, true, ecName, gotoLabel, sb, prefix + g_tab);
     } else {
-        String element = String::Format("&(*%s)[i]", name.string());
-        elementType_->EmitCProxyReadVar(parcelName, element, true, gotoLabel, sb, prefix + g_tab);
+        String element = String::Format("&%s[i]", name.string());
+        elementType_->EmitCProxyReadVar(parcelName, element, true, ecName, gotoLabel, sb, prefix + g_tab);
     }
     sb.Append(prefix).Append("}\n");
 }
 
-void ASTListType::EmitCStubReadVar(const String& parcelName, const String& name, StringBuilder& sb,
-    const String& prefix) const
+void ASTListType::EmitCStubReadVar(const String& parcelName, const String& name, const String& ecName,
+    const String& gotoLabel, StringBuilder& sb, const String& prefix) const
 {
     String lenName = String::Format("%sLen", name.string());
 
@@ -165,12 +159,12 @@ void ASTListType::EmitCStubReadVar(const String& parcelName, const String& name,
         parcelName.string(), lenName.string());
     sb.Append(prefix + g_tab).AppendFormat(
         "HDF_LOGE(\"%%{public}s: read %s size failed!\", __func__);\n", name.string());
-    sb.Append(prefix + g_tab).Append("ec = HDF_ERR_INVALID_PARAM;\n");
-    sb.Append(prefix + g_tab).Append("goto errors;\n");
+    sb.Append(prefix + g_tab).AppendFormat("%s = HDF_ERR_INVALID_PARAM;\n", ecName.string());
+    sb.Append(prefix + g_tab).AppendFormat("goto %s;\n", gotoLabel.string());
     sb.Append(prefix).Append("}\n\n");
 
     sb.Append(prefix).AppendFormat("if (%s > 0) {\n", lenName.string());
-    EmitCMallocVar(name, lenName, false, "errors", sb, prefix + g_tab);
+    EmitCMallocVar(name, lenName, false, ecName, gotoLabel, sb, prefix + g_tab);
     sb.Append("\n");
 
     if (Options::GetInstance().DoGenerateKernelCode()) {
@@ -180,28 +174,45 @@ void ASTListType::EmitCStubReadVar(const String& parcelName, const String& name,
     }
 
     if (elementType_->GetTypeKind() == TypeKind::TYPE_STRING) {
-        EmitCStubReadStrElement(parcelName, name, sb, prefix);
+        EmitCStubReadStrElement(parcelName, name, ecName, gotoLabel, sb, prefix);
     } else if (elementType_->GetTypeKind() == TypeKind::TYPE_STRUCT) {
         String element = String::Format("&%s[i]", name.string());
-        elementType_->EmitCStubReadVar(parcelName, element, sb, prefix + g_tab + g_tab);
+        elementType_->EmitCStubReadVar(parcelName, element, ecName, gotoLabel, sb, prefix + g_tab + g_tab);
     } else if (elementType_->GetTypeKind() == TypeKind::TYPE_UNION) {
         String element = String::Format("%s[i]", name.string());
         String elementCp = String::Format("%sElementCp", name.string());
-        elementType_->EmitCStubReadVar(parcelName, elementCp, sb, prefix + g_tab + g_tab);
+        elementType_->EmitCStubReadVar(parcelName, elementCp, ecName, gotoLabel, sb, prefix + g_tab + g_tab);
         sb.Append(prefix + g_tab + g_tab).AppendFormat("(void)memcpy_s(&%s, sizeof(%s), %s, sizeof(%s));\n",
             element.string(), elementType_->EmitCType().string(), elementCp.string(),
             elementType_->EmitCType().string());
     } else if (elementType_->GetTypeKind() == TypeKind::TYPE_FILEDESCRIPTOR) {
         String element = String::Format("%s[i]", name.string());
-        elementType_->EmitCStubReadVar(parcelName, element, sb, prefix + g_tab + g_tab);
+        elementType_->EmitCStubReadVar(parcelName, element, ecName, gotoLabel, sb, prefix + g_tab + g_tab);
     } else {
         String element = String::Format("&%s[i]", name.string());
-        elementType_->EmitCStubReadVar(parcelName, element, sb, prefix + g_tab + g_tab);
+        elementType_->EmitCStubReadVar(parcelName, element, ecName, gotoLabel, sb, prefix + g_tab + g_tab);
     }
     sb.Append(prefix + g_tab).Append("}\n");
     sb.Append(prefix).Append("}\n");
 }
 
+void ASTListType::EmitCStubReadOutVar(const String& parcelName, const String& name, const String& ecName,
+    const String& gotoLabel, StringBuilder& sb, const String& prefix) const
+{
+    String lenName = String::Format("%sLen", name.string());
+    sb.Append(prefix).AppendFormat("if (!HdfSbufReadUint32(%s, &%s)) {\n",
+        parcelName.string(), lenName.string());
+    sb.Append(prefix + g_tab).AppendFormat(
+        "HDF_LOGE(\"%%{public}s: read %s size failed!\", __func__);\n", name.string());
+    sb.Append(prefix + g_tab).AppendFormat("%s = HDF_ERR_INVALID_PARAM;\n", ecName.string());
+    sb.Append(prefix + g_tab).AppendFormat("goto %s;\n", gotoLabel.string());
+    sb.Append(prefix).Append("}\n\n");
+
+    sb.Append(prefix).AppendFormat("if (%s > 0) {\n", lenName.string());
+    EmitCMallocVar(name, lenName, false, ecName, gotoLabel, sb, prefix + g_tab);
+    sb.Append(prefix).Append("}\n");
+}
+
 void ASTListType::EmitCppWriteVar(const String& parcelName, const String& name, StringBuilder& sb,
     const String& prefix, unsigned int innerLevel) const
 {
@@ -252,14 +263,14 @@ void ASTListType::EmitCMarshalling(const String& name, StringBuilder& sb, const
     sb.Append(prefix).Append("}\n");
 }
 
-void ASTListType::EmitCUnMarshalling(const String& name, StringBuilder& sb, const String& prefix,
-    std::vector<String>& freeObjStatements) const
+void ASTListType::EmitCUnMarshalling(const String& name, const String& gotoLabel, StringBuilder& sb,
+    const String& prefix, std::vector<String>& freeObjStatements) const
 {
     String lenName = String::Format("%sLen", name.string());
     sb.Append(prefix).AppendFormat("if (!HdfSbufReadUint32(data, &%s)) {\n", lenName.string());
     sb.Append(prefix + g_tab).AppendFormat(
         "HDF_LOGE(\"%%{public}s: read %s failed!\", __func__);\n", lenName.string());
-    sb.Append(prefix + g_tab).Append("goto errors;\n");
+    sb.Append(prefix + g_tab).AppendFormat("goto %s;\n", gotoLabel.string());
     sb.Append(prefix).Append("}\n");
 
     sb.Append(prefix).AppendFormat("if (%s > 0) {\n", lenName.string());
@@ -268,7 +279,7 @@ void ASTListType::EmitCUnMarshalling(const String& name, StringBuilder& sb, cons
     sb.Append(newPrefix).AppendFormat("%s = (%s*)OsalMemCalloc(sizeof(%s) * %s);\n",
         name.string(), elementType_->EmitCType().string(), elementType_->EmitCType().string(), lenName.string());
     sb.Append(newPrefix).AppendFormat("if (%s == NULL) {\n", name.string());
-    sb.Append(newPrefix + g_tab).AppendFormat("goto errors;\n");
+    sb.Append(prefix + g_tab).AppendFormat("goto %s;\n", gotoLabel.string());
     sb.Append(newPrefix).Append("}\n");
 
     freeObjStatements.push_back(String::Format("OsalMemFree(%s);\n", name.string()));
@@ -280,31 +291,31 @@ void ASTListType::EmitCUnMarshalling(const String& name, StringBuilder& sb, cons
     }
 
     if (elementType_->GetTypeKind() == TypeKind::TYPE_STRING) {
-        EmitCStringElementUnMarshalling(name, sb, newPrefix, freeObjStatements);
+        EmitCStringElementUnMarshalling(name, gotoLabel, sb, newPrefix, freeObjStatements);
     } else if (elementType_->GetTypeKind() == TypeKind::TYPE_STRUCT) {
         String element = String::Format("&%s[i]", name.string());
-        elementType_->EmitCUnMarshalling(element, sb, newPrefix + g_tab, freeObjStatements);
+        elementType_->EmitCUnMarshalling(element, gotoLabel, sb, newPrefix + g_tab, freeObjStatements);
     } else if (elementType_->GetTypeKind() == TypeKind::TYPE_UNION) {
         String element = String::Format("%s[i]", name.string());
         String elementCp = String::Format("%sElementCp", name.string());
-        elementType_->EmitCUnMarshalling(elementCp, sb, newPrefix + g_tab, freeObjStatements);
+        elementType_->EmitCUnMarshalling(elementCp, gotoLabel, sb, newPrefix + g_tab, freeObjStatements);
         sb.Append(newPrefix + g_tab).AppendFormat("(void)memcpy_s(&%s, sizeof(%s), %s, sizeof(%s));\n",
             element.string(), elementType_->EmitCType().string(), elementCp.string(),
             elementType_->EmitCType().string());
     } else {
         String element = String::Format("%s[i]", name.string());
-        elementType_->EmitCUnMarshalling(element, sb, newPrefix + g_tab, freeObjStatements);
+        elementType_->EmitCUnMarshalling(element, gotoLabel, sb, newPrefix + g_tab, freeObjStatements);
     }
     sb.Append(newPrefix).Append("}\n");
     sb.Append(prefix).Append("}\n");
     freeObjStatements.pop_back();
 }
 
-void ASTListType::EmitCStringElementUnMarshalling(const String& name, StringBuilder& sb, const String& newPrefix,
-    std::vector<String>& freeObjStatements) const
+void ASTListType::EmitCStringElementUnMarshalling(const String& name, const String& gotoLabel, StringBuilder& sb,
+    const String& newPrefix, std::vector<String>& freeObjStatements) const
 {
     String element = String::Format("%sElement", name.string());
-    elementType_->EmitCUnMarshalling(element, sb, newPrefix + g_tab, freeObjStatements);
+    elementType_->EmitCUnMarshalling(element, gotoLabel, sb, newPrefix + g_tab, freeObjStatements);
     if (Options::GetInstance().DoGenerateKernelCode()) {
         sb.Append(newPrefix).AppendFormat("%s[i] = (char*)OsalMemCalloc(strlen(%s) + 1);\n",
             name.string(), element.string());
@@ -376,7 +387,7 @@ void ASTListType::EmitCppUnMarshalling(const String& parcelName, const String& n
 void ASTListType::EmitMemoryRecycle(const String& name, bool isClient, bool ownership, StringBuilder& sb,
     const String& prefix) const
 {
-    String varName = isClient ? String::Format("*%s", name.string()) : name;
+    String varName = name;
     String lenName = isClient ? String::Format("*%sLen", name.string()) : String::Format("%sLen", name.string());
 
     sb.Append(prefix).AppendFormat("if (%s > 0 && %s != NULL) {\n", lenName.string(), varName.string());
@@ -387,8 +398,7 @@ void ASTListType::EmitMemoryRecycle(const String& name, bool isClient, bool owne
             sb.Append(prefix + g_tab).AppendFormat("for (uint32_t i = 0; i < %s; i++) {\n", lenName.string());
         }
 
-        String elementName = isClient ? String::Format("(%s)[i]", varName.string()) :
-            String::Format("%s[i]", varName.string());
+        String elementName = String::Format("%s[i]", varName.string());
         elementType_->EmitMemoryRecycle(elementName, false, false, sb, prefix + g_tab + g_tab);
         sb.Append(prefix + g_tab).Append("}\n");
     }
@@ -434,8 +444,8 @@ void ASTListType::EmitJavaReadInnerVar(const String& parcelName, const String& n
     sb.Append(prefix).Append("}\n");
 }
 
-void ASTListType::EmitCMallocVar(const String& name, const String& lenName, bool isClient, const String& gotoLabel,
-    StringBuilder& sb, const String& prefix) const
+void ASTListType::EmitCMallocVar(const String& name, const String& lenName, bool isClient, const String& ecName,
+    const String& gotoLabel, StringBuilder& sb, const String& prefix) const
 {
     String varName = isClient ? String::Format("*%s", name.string()) : name;
     String lenVarName = isClient ? String::Format("*%s", lenName.string()) : lenName;
@@ -443,58 +453,62 @@ void ASTListType::EmitCMallocVar(const String& name, const String& lenName, bool
     sb.Append(prefix).AppendFormat("%s = (%s*)OsalMemCalloc(sizeof(%s) * (%s));\n", varName.string(),
         elementType_->EmitCType().string(), elementType_->EmitCType().string(), lenVarName.string());
     sb.Append(prefix).AppendFormat("if (%s == NULL) {\n", varName.string());
-    sb.Append(prefix + g_tab).AppendFormat("ec = HDF_ERR_MALLOC_FAIL;\n");
+    sb.Append(prefix + g_tab).AppendFormat("HDF_LOGE(\"%%{public}s: malloc %s failed\", __func__);\n",
+        varName.string());
+    sb.Append(prefix + g_tab).AppendFormat("%s = HDF_ERR_MALLOC_FAIL;\n", ecName.string());
     sb.Append(prefix + g_tab).AppendFormat("goto %s;\n", gotoLabel.string());
-    sb.Append(prefix).AppendFormat("}\n");
+    sb.Append(prefix).Append("}\n");
 }
 
-void ASTListType::EmitCProxyReadStrElement(const String& parcelName, const String& name, const String& gotoLabel,
-    StringBuilder& sb, const String& prefix) const
+void ASTListType::EmitCProxyReadStrElement(const String& parcelName, const String& name, const String& ecName,
+    const String& gotoLabel, StringBuilder& sb, const String& prefix) const
 {
     String cpName = String::Format("%sCp", name.string());
-    elementType_->EmitCProxyReadVar(parcelName, cpName, true, gotoLabel, sb, prefix + g_tab);
+        elementType_->EmitCProxyReadVar(parcelName, cpName, true, ecName, gotoLabel, sb, prefix + g_tab);
     sb.Append("\n");
     if (Options::GetInstance().DoGenerateKernelCode()) {
-        sb.Append(prefix + g_tab).AppendFormat("(*%s)[i] = (char*)OsalMemCalloc(strlen(%s) + 1);\n",
+        sb.Append(prefix + g_tab).AppendFormat("%s[i] = (char*)OsalMemCalloc(strlen(%s) + 1);\n",
             name.string(), cpName.string());
-        sb.Append(prefix + g_tab).AppendFormat("if ((*%s)[i] == NULL) {\n", name.string());
-        sb.Append(prefix + g_tab + g_tab).Append("ec = HDF_ERR_MALLOC_FAIL;\n");
+        sb.Append(prefix + g_tab).AppendFormat("if (%s[i] == NULL) {\n", name.string());
+        sb.Append(prefix + g_tab + g_tab).AppendFormat("%s = HDF_ERR_MALLOC_FAIL;\n", ecName.string());
+        sb.Append(prefix + g_tab).AppendFormat("HDF_LOGE(\"%%{public}s: malloc %s[i] failed\", __func__);\n",
+            name.string());
         sb.Append(prefix + g_tab + g_tab).AppendFormat("goto %s;\n", gotoLabel.string());
         sb.Append(prefix + g_tab).Append("}\n\n");
-        sb.Append(prefix + g_tab).AppendFormat("if (strcpy_s((*%s)[i], (strlen(%s) + 1), %s) != HDF_SUCCESS) {\n",
+        sb.Append(prefix + g_tab).AppendFormat("if (strcpy_s(%s[i], (strlen(%s) + 1), %s) != HDF_SUCCESS) {\n",
             name.string(), cpName.string(), cpName.string());
         sb.Append(prefix + g_tab + g_tab).AppendFormat("HDF_LOGE(\"%%{public}s: read %s failed!\", __func__);\n",
             cpName.string());
-        sb.Append(prefix + g_tab + g_tab).Append("ec = HDF_ERR_INVALID_PARAM;\n");
+        sb.Append(prefix + g_tab + g_tab).AppendFormat("%s = HDF_ERR_INVALID_PARAM;\n", ecName.string());
         sb.Append(prefix + g_tab + g_tab).AppendFormat("goto %s;\n", gotoLabel.string());
         sb.Append(prefix + g_tab).Append("}\n");
     } else {
-        sb.Append(prefix + g_tab).AppendFormat("(*%s)[i] = strdup(%sCp);\n",
+        sb.Append(prefix + g_tab).AppendFormat("%s[i] = strdup(%sCp);\n",
             name.string(), name.string());
     }
 }
 
-void ASTListType::EmitCStubReadStrElement(const String& parcelName, const String& name, StringBuilder& sb,
-    const String& prefix) const
+void ASTListType::EmitCStubReadStrElement(const String& parcelName, const String& name, const String& ecName,
+    const String& gotoLabel, StringBuilder& sb, const String& prefix) const
 {
     String element = String::Format("%sCp", name.string());
     String newPrefix = prefix + g_tab + g_tab;
-    elementType_->EmitCStubReadVar(parcelName, element, sb, newPrefix);
+    elementType_->EmitCStubReadVar(parcelName, element, ecName, gotoLabel, sb, newPrefix);
     sb.Append("\n");
     if (Options::GetInstance().DoGenerateKernelCode()) {
         sb.Append(newPrefix).AppendFormat("%s[i] = (char*)OsalMemCalloc(strlen(%s) + 1);\n",
             name.string(), element.string());
         sb.Append(newPrefix).AppendFormat("if (%s[i] == NULL) {\n", name.string());
-        sb.Append(newPrefix + g_tab).Append("ec = HDF_ERR_MALLOC_FAIL;\n");
-        sb.Append(newPrefix + g_tab).AppendFormat("goto errors;\n");
+        sb.Append(newPrefix + g_tab).AppendFormat("%s = HDF_ERR_MALLOC_FAIL;\n", ecName.string());
+        sb.Append(newPrefix + g_tab).AppendFormat("goto %s;\n", gotoLabel.string());
         sb.Append(newPrefix).Append("}\n\n");
 
-        sb.Append(newPrefix).AppendFormat("if (strcpy_s((%s)[i], (strlen(%s) + 1), %s) != HDF_SUCCESS) {\n",
+        sb.Append(newPrefix).AppendFormat("if (strcpy_s(%s[i], (strlen(%s) + 1), %s) != HDF_SUCCESS) {\n",
             name.string(), element.string(), element.string());
         sb.Append(newPrefix + g_tab).AppendFormat("HDF_LOGE(\"%%{public}s: read %s failed!\", __func__);\n",
             element.string());
-        sb.Append(newPrefix + g_tab).Append("ec = HDF_ERR_INVALID_PARAM;\n");
-        sb.Append(newPrefix + g_tab).Append("goto errors;\n");
+        sb.Append(newPrefix + g_tab).AppendFormat("%s = HDF_ERR_INVALID_PARAM;\n", ecName.string());
+        sb.Append(newPrefix + g_tab).AppendFormat("goto %s;\n", gotoLabel.string());
         sb.Append(newPrefix).Append("}\n");
     } else {
         sb.Append(newPrefix).AppendFormat("%s[i] = strdup(%sCp);\n", name.string(), name.string());
diff --git a/tools/hdi-gen/ast/ast_list_type.h b/tools/hdi-gen/ast/ast_list_type.h
index a0ab05eb..9b0b8fb4 100755
--- a/tools/hdi-gen/ast/ast_list_type.h
+++ b/tools/hdi-gen/ast/ast_list_type.h
@@ -38,14 +38,20 @@ public:
 
     String EmitJavaType(TypeMode mode, bool isInnerType = false) const override;
 
-    void EmitCWriteVar(const String& parcelName, const String& name, const String& gotoLabel,
-        StringBuilder& sb, const String& prefix) const override;
-
-    void EmitCProxyReadVar(const String& parcelName, const String& name, bool isInnerType,
+    void EmitCWriteVar(const String& parcelName, const String& name, const String& ecName,
         const String& gotoLabel, StringBuilder& sb, const String& prefix) const override;
 
-    void EmitCStubReadVar(const String& parcelName, const String& name, StringBuilder& sb,
-        const String& prefix) const override;
+    void EmitCProxyWriteOutVar(const String& parcelName, const String& name, const String& ecName,
+        const String& gotoLabel, StringBuilder& sb, const String& prefix) const override;
+
+    void EmitCProxyReadVar(const String& parcelName, const String& name, bool isInnerType, const String& ecName,
+        const String& gotoLabel, StringBuilder& sb, const String& prefix) const override;
+
+    void EmitCStubReadVar(const String& parcelName, const String& name, const String& ecName,
+        const String& gotoLabel, StringBuilder& sb, const String& prefix) const override;
+
+    void EmitCStubReadOutVar(const String& parcelName, const String& name, const String& ecName,
+        const String& gotoLabel, StringBuilder& sb, const String& prefix) const override;
 
     void EmitCppWriteVar(const String& parcelName, const String& name, StringBuilder& sb,
         const String& prefix, unsigned int innerLevel = 0) const override;
@@ -55,7 +61,7 @@ public:
 
     void EmitCMarshalling(const String& name, StringBuilder& sb, const String& prefix) const override;
 
-    void EmitCUnMarshalling(const String& name, StringBuilder& sb, const String& prefix,
+    void EmitCUnMarshalling(const String& name, const String& gotoLabel, StringBuilder& sb, const String& prefix,
         std::vector<String>& freeObjStatements) const override;
 
     void EmitCppMarshalling(const String& parcelName, const String& name, StringBuilder& sb,
@@ -76,17 +82,17 @@ public:
     void EmitJavaReadInnerVar(const String& parcelName, const String& name, bool isInner, StringBuilder& sb,
         const String& prefix) const override;
 private:
-    void EmitCMallocVar(const String& name, const String& lenName, bool isClient, const String& gotoLabel,
-        StringBuilder& sb, const String& prefix) const;
+    void EmitCMallocVar(const String& name, const String& lenName, bool isClient, const String& ecName,
+        const String& gotoLabel, StringBuilder& sb, const String& prefix) const;
 
-    void EmitCProxyReadStrElement(const String& parcelName, const String& name, const String& gotoLabel,
-        StringBuilder& sb, const String& prefix) const;
+    void EmitCProxyReadStrElement(const String& parcelName, const String& name, const String& ecName,
+        const String& gotoLabel, StringBuilder& sb, const String& prefix) const;
 
-    void EmitCStubReadStrElement(const String& parcelName, const String& name, StringBuilder& sb,
-        const String& prefix) const;
+    void EmitCStubReadStrElement(const String& parcelName, const String& name, const String& ecName,
+        const String& gotoLabel, StringBuilder& sb, const String& prefix) const;
 
-    void EmitCStringElementUnMarshalling(const String& name, StringBuilder& sb, const String& newPrefix,
-        std::vector<String>& freeObjStatements) const;
+    void EmitCStringElementUnMarshalling(const String& name, const String& gotoLabel, StringBuilder& sb,
+        const String& newPrefix, std::vector<String>& freeObjStatements) const;
 
     AutoPtr<ASTType> elementType_ = nullptr;
 };
diff --git a/tools/hdi-gen/ast/ast_long_type.cpp b/tools/hdi-gen/ast/ast_long_type.cpp
index fa0cd6f2..f1fd0eea 100755
--- a/tools/hdi-gen/ast/ast_long_type.cpp
+++ b/tools/hdi-gen/ast/ast_long_type.cpp
@@ -62,40 +62,40 @@ String ASTLongType::EmitJavaType(TypeMode mode, bool isInnerType) const
     return isInnerType ? "Long" : "long";
 }
 
-void ASTLongType::EmitCWriteVar(const String& parcelName, const String& name, const String& gotoLabel,
-    StringBuilder& sb, const String& prefix) const
+void ASTLongType::EmitCWriteVar(const String& parcelName, const String& name, const String& ecName,
+    const String& gotoLabel, StringBuilder& sb, const String& prefix) const
 {
     sb.Append(prefix).AppendFormat("if (!HdfSbufWriteInt64(%s, %s)) {\n",
         parcelName.string(), name.string());
     sb.Append(prefix + g_tab).AppendFormat(
         "HDF_LOGE(\"%%{public}s: write %s failed!\", __func__);\n", name.string());
-    sb.Append(prefix + g_tab).Append("ec = HDF_ERR_INVALID_PARAM;\n");
+    sb.Append(prefix + g_tab).AppendFormat("%s = HDF_ERR_INVALID_PARAM;\n", ecName.string());
     sb.Append(prefix + g_tab).AppendFormat("goto %s;\n", gotoLabel.string());
     sb.Append(prefix).Append("}\n");
 }
 
 void ASTLongType::EmitCProxyReadVar(const String& parcelName, const String& name, bool isInnerType,
+    const String& ecName, const String& gotoLabel, StringBuilder& sb, const String& prefix) const
+{
+    sb.Append(prefix).AppendFormat("if (!HdfSbufReadInt64(%s, %s)) {\n", parcelName.string(), name.string());
+    sb.Append(prefix + g_tab).AppendFormat(
+        "HDF_LOGE(\"%%{public}s: read %s failed!\", __func__);\n", name.string());
+    sb.Append(prefix + g_tab).AppendFormat("%s = HDF_ERR_INVALID_PARAM;\n", ecName.string());
+    sb.Append(prefix + g_tab).AppendFormat("goto %s;\n", gotoLabel.string());
+    sb.Append(prefix).Append("}\n");
+}
+
+void ASTLongType::EmitCStubReadVar(const String& parcelName, const String& name, const String& ecName,
     const String& gotoLabel, StringBuilder& sb, const String& prefix) const
 {
     sb.Append(prefix).AppendFormat("if (!HdfSbufReadInt64(%s, %s)) {\n", parcelName.string(), name.string());
     sb.Append(prefix + g_tab).AppendFormat(
         "HDF_LOGE(\"%%{public}s: read %s failed!\", __func__);\n", name.string());
-    sb.Append(prefix + g_tab).Append("ec = HDF_ERR_INVALID_PARAM;\n");
+    sb.Append(prefix + g_tab).AppendFormat("%s = HDF_ERR_INVALID_PARAM;\n", ecName.string());
     sb.Append(prefix + g_tab).AppendFormat("goto %s;\n", gotoLabel.string());
     sb.Append(prefix).Append("}\n");
 }
 
-void ASTLongType::EmitCStubReadVar(const String& parcelName, const String& name, StringBuilder& sb,
-    const String& prefix) const
-{
-    sb.Append(prefix).AppendFormat("if (!HdfSbufReadInt64(%s, %s)) {\n", parcelName.string(), name.string());
-    sb.Append(prefix + g_tab).AppendFormat(
-        "HDF_LOGE(\"%%{public}s: read %s failed!\", __func__);\n", name.string());
-    sb.Append(prefix + g_tab).Append("ec = HDF_ERR_INVALID_PARAM;\n");
-    sb.Append(prefix + g_tab).Append("goto errors;\n");
-    sb.Append(prefix).Append("}\n");
-}
-
 void ASTLongType::EmitCppWriteVar(const String& parcelName, const String& name, StringBuilder& sb,
     const String& prefix, unsigned int innerLevel) const
 {
@@ -126,14 +126,14 @@ void ASTLongType::EmitCMarshalling(const String& name, StringBuilder& sb, const
     sb.Append(prefix).Append("}\n");
 }
 
-void ASTLongType::EmitCUnMarshalling(const String& name, StringBuilder& sb, const String& prefix,
-    std::vector<String>& freeObjStatements) const
+void ASTLongType::EmitCUnMarshalling(const String& name, const String& gotoLabel, StringBuilder& sb,
+    const String& prefix, std::vector<String>& freeObjStatements) const
 {
     sb.Append(prefix).AppendFormat("if (!HdfSbufReadInt64(data, &%s)) {\n", name.string());
     sb.Append(prefix + g_tab).AppendFormat(
         "HDF_LOGE(\"%%{public}s: read %s failed!\", __func__);\n", name.string());
     EmitFreeStatements(freeObjStatements, sb, prefix + g_tab);
-    sb.Append(prefix + g_tab).Append("goto errors;\n");
+    sb.Append(prefix + g_tab).AppendFormat("goto %s;\n", gotoLabel.string());
     sb.Append(prefix).Append("}\n");
 }
 
diff --git a/tools/hdi-gen/ast/ast_long_type.h b/tools/hdi-gen/ast/ast_long_type.h
index 130a4bbe..dac32efc 100755
--- a/tools/hdi-gen/ast/ast_long_type.h
+++ b/tools/hdi-gen/ast/ast_long_type.h
@@ -27,14 +27,14 @@ public:
 
     String EmitJavaType(TypeMode mode, bool isInnerType = false) const override;
 
-    void EmitCWriteVar(const String& parcelName, const String& name, const String& gotoLabel,
-        StringBuilder& sb, const String& prefix) const override;
-
-    void EmitCProxyReadVar(const String& parcelName, const String& name, bool isInnerType,
+    void EmitCWriteVar(const String& parcelName, const String& name, const String& ecName,
         const String& gotoLabel, StringBuilder& sb, const String& prefix) const override;
 
-    void EmitCStubReadVar(const String& parcelName, const String& name, StringBuilder& sb,
-        const String& prefix) const override;
+    void EmitCProxyReadVar(const String& parcelName, const String& name, bool isInnerType, const String& ecName,
+        const String& gotoLabel, StringBuilder& sb, const String& prefix) const override;
+
+    void EmitCStubReadVar(const String& parcelName, const String& name, const String& ecName,
+        const String& gotoLabel, StringBuilder& sb, const String& prefix) const override;
 
     void EmitCppWriteVar(const String& parcelName, const String& name, StringBuilder& sb,
         const String& prefix, unsigned int innerLevel = 0) const override;
@@ -44,7 +44,7 @@ public:
 
     void EmitCMarshalling(const String& name, StringBuilder& sb, const String& prefix) const override;
 
-    void EmitCUnMarshalling(const String& name, StringBuilder& sb, const String& prefix,
+    void EmitCUnMarshalling(const String& name, const String& gotoLabel, StringBuilder& sb, const String& prefix,
         std::vector<String>& freeObjStatements) const override;
 
     void EmitCppMarshalling(const String& parcelName, const String& name, StringBuilder& sb,
diff --git a/tools/hdi-gen/ast/ast_parameter.cpp b/tools/hdi-gen/ast/ast_parameter.cpp
index 1e87e1b2..396685df 100755
--- a/tools/hdi-gen/ast/ast_parameter.cpp
+++ b/tools/hdi-gen/ast/ast_parameter.cpp
@@ -36,7 +36,6 @@ String ASTParameter::Dump(const String& prefix)
 String ASTParameter::EmitCParameter()
 {
     StringBuilder sb;
-
     switch (type_->GetTypeKind()) {
         case TypeKind::TYPE_BOOLEAN:
         case TypeKind::TYPE_BYTE:
@@ -51,16 +50,21 @@ String ASTParameter::EmitCParameter()
         case TypeKind::TYPE_DOUBLE:
         case TypeKind::TYPE_ENUM:
         case TypeKind::TYPE_FILEDESCRIPTOR:
-        case TypeKind::TYPE_STRING:
         case TypeKind::TYPE_INTERFACE:
+        case TypeKind::TYPE_STRING:
         case TypeKind::TYPE_STRUCT:
         case TypeKind::TYPE_UNION:
         case TypeKind::TYPE_VOID: {
+            StringBuilder paramStr;
             if (attribute_ == ParamAttr::PARAM_IN) {
-                return String::Format("%s %s", type_->EmitCType(TypeMode::PARAM_IN).string(), name_.string());
+                paramStr.AppendFormat("%s %s", type_->EmitCType(TypeMode::PARAM_IN).string(), name_.string());
             } else {
-                return String::Format("%s %s", type_->EmitCType(TypeMode::PARAM_OUT).string(), name_.string());
+                paramStr.AppendFormat("%s %s", type_->EmitCType(TypeMode::PARAM_OUT).string(), name_.string());
             }
+            if (type_->GetTypeKind() == TypeKind::TYPE_STRING && attribute_ == ParamAttr::PARAM_OUT) {
+                paramStr.AppendFormat(", uint32_t %sLen", name_.string());
+            }
+            return paramStr.ToString();
         }
         case TypeKind::TYPE_ARRAY:
         case TypeKind::TYPE_LIST: {
@@ -70,19 +74,13 @@ String ASTParameter::EmitCParameter()
             } else {
                 paramStr.AppendFormat("%s %s", type_->EmitCType(TypeMode::PARAM_OUT).string(), name_.string());
             }
-
-            if (attribute_ == ParamAttr::PARAM_IN) {
-                paramStr.AppendFormat(", uint32_t %sLen", name_.string());
-            } else {
-                paramStr.AppendFormat(", uint32_t* %sLen", name_.string());
-            }
-
+            paramStr.AppendFormat(", uint32_t%s %sLen", (attribute_ == ParamAttr::PARAM_IN) ? "" : "*",
+                name_.string());
             return paramStr.ToString();
         }
         default:
             return String::Format("unknow type %s", name_.string());
     }
-
     return sb.ToString();
 }
 
@@ -206,14 +204,45 @@ String ASTParameter::EmitJavaLocalVar()
     return "";
 }
 
-void ASTParameter::EmitCWriteVar(const String& parcelName, const String& gotoLabel, StringBuilder& sb,
-    const String& prefix) const
+void ASTParameter::EmitCWriteVar(const String& parcelName, const String& ecName, const String& gotoLabel,
+    StringBuilder& sb, const String& prefix) const
 {
     if (type_ == nullptr) {
         return;
     }
 
-    type_->EmitCWriteVar(parcelName, name_, gotoLabel, sb, prefix);
+    type_->EmitCWriteVar(parcelName, name_, ecName, gotoLabel, sb, prefix);
+}
+
+bool ASTParameter::EmitCProxyWriteOutVar(const String& parcelName, const String& ecName, const String& gotoLabel,
+    StringBuilder& sb, const String& prefix) const
+{
+    if (type_ == nullptr) {
+        return false;
+    }
+
+    if (type_->IsStringType() || type_->IsArrayType() || type_->IsListType()) {
+        type_->EmitCProxyWriteOutVar(parcelName, name_, ecName, gotoLabel, sb, prefix);
+        return true;
+    }
+
+    return false;
+}
+
+bool ASTParameter::EmitCStubReadOutVar(const String& parcelName, const String& ecName, const String& gotoLabel,
+    StringBuilder& sb, const String& prefix) const
+{
+    if (type_ == nullptr) {
+        return false;
+    }
+
+    if (type_->IsStringType() || type_->IsArrayType() || type_->IsListType()
+        || type_->IsStructType() || type_->IsUnionType()) {
+        type_->EmitCStubReadOutVar(parcelName, name_, ecName, gotoLabel, sb, prefix);
+        return true;
+    }
+
+    return false;
 }
 
 void ASTParameter::EmitJavaWriteVar(const String& parcelName, StringBuilder& sb, const String& prefix) const
diff --git a/tools/hdi-gen/ast/ast_parameter.h b/tools/hdi-gen/ast/ast_parameter.h
index 85603674..96ba2d36 100755
--- a/tools/hdi-gen/ast/ast_parameter.h
+++ b/tools/hdi-gen/ast/ast_parameter.h
@@ -72,9 +72,15 @@ public:
 
     String EmitJavaLocalVar();
 
-    void EmitCWriteVar(const String& parcelName, const String& gotoLabel, StringBuilder& sb,
+    void EmitCWriteVar(const String& parcelName, const String& ecName, const String& gotoLabel, StringBuilder& sb,
         const String& prefix) const;
 
+    bool EmitCProxyWriteOutVar(const String& parcelName, const String& ecName, const String& gotoLabel,
+        StringBuilder& sb, const String& prefix) const;
+
+    bool EmitCStubReadOutVar(const String& parcelName, const String& ecName, const String& gotoLabel,
+        StringBuilder& sb, const String& prefix) const;
+
     void EmitJavaWriteVar(const String& parcelName, StringBuilder& sb, const String& prefix) const;
 
     void EmitJavaReadVar(const String& parcelName, StringBuilder& sb, const String& prefix) const;
diff --git a/tools/hdi-gen/ast/ast_short_type.cpp b/tools/hdi-gen/ast/ast_short_type.cpp
index 9f2b4eea..28cb8e0f 100755
--- a/tools/hdi-gen/ast/ast_short_type.cpp
+++ b/tools/hdi-gen/ast/ast_short_type.cpp
@@ -62,40 +62,40 @@ String ASTShortType::EmitJavaType(TypeMode mode, bool isInnerType) const
     return isInnerType ? "Short" : "short";
 }
 
-void ASTShortType::EmitCWriteVar(const String& parcelName, const String& name, const String& gotoLabel,
-    StringBuilder& sb, const String& prefix) const
+void ASTShortType::EmitCWriteVar(const String& parcelName, const String& name, const String& ecName,
+    const String& gotoLabel, StringBuilder& sb, const String& prefix) const
 {
     sb.Append(prefix).AppendFormat("if (!HdfSbufWriteInt16(%s, %s)) {\n",
         parcelName.string(), name.string());
     sb.Append(prefix + g_tab).AppendFormat(
         "HDF_LOGE(\"%%{public}s: write %s failed!\", __func__);\n", name.string());
-    sb.Append(prefix + g_tab).Append("ec = HDF_ERR_INVALID_PARAM;\n");
+    sb.Append(prefix + g_tab).AppendFormat("%s = HDF_ERR_INVALID_PARAM;\n", ecName.string());
     sb.Append(prefix + g_tab).AppendFormat("goto %s;\n", gotoLabel.string());
     sb.Append(prefix).Append("}\n");
 }
 
 void ASTShortType::EmitCProxyReadVar(const String& parcelName, const String& name, bool isInnerType,
+    const String& ecName, const String& gotoLabel, StringBuilder& sb, const String& prefix) const
+{
+    sb.Append(prefix).AppendFormat("if (!HdfSbufReadInt16(%s, %s)) {\n", parcelName.string(), name.string());
+    sb.Append(prefix + g_tab).AppendFormat(
+        "HDF_LOGE(\"%%{public}s: read %s failed!\", __func__);\n", name.string());
+    sb.Append(prefix + g_tab).AppendFormat("%s = HDF_ERR_INVALID_PARAM;\n", ecName.string());
+    sb.Append(prefix + g_tab).AppendFormat("goto %s;\n", gotoLabel.string());
+    sb.Append(prefix).Append("}\n");
+}
+
+void ASTShortType::EmitCStubReadVar(const String& parcelName, const String& name, const String& ecName,
     const String& gotoLabel, StringBuilder& sb, const String& prefix) const
 {
     sb.Append(prefix).AppendFormat("if (!HdfSbufReadInt16(%s, %s)) {\n", parcelName.string(), name.string());
     sb.Append(prefix + g_tab).AppendFormat(
         "HDF_LOGE(\"%%{public}s: read %s failed!\", __func__);\n", name.string());
-    sb.Append(prefix + g_tab).Append("ec = HDF_ERR_INVALID_PARAM;\n");
+    sb.Append(prefix + g_tab).AppendFormat("%s = HDF_ERR_INVALID_PARAM;\n", ecName.string());
     sb.Append(prefix + g_tab).AppendFormat("goto %s;\n", gotoLabel.string());
     sb.Append(prefix).Append("}\n");
 }
 
-void ASTShortType::EmitCStubReadVar(const String& parcelName, const String& name, StringBuilder& sb,
-    const String& prefix) const
-{
-    sb.Append(prefix).AppendFormat("if (!HdfSbufReadInt16(%s, %s)) {\n", parcelName.string(), name.string());
-    sb.Append(prefix + g_tab).AppendFormat(
-        "HDF_LOGE(\"%%{public}s: read %s failed!\", __func__);\n", name.string());
-    sb.Append(prefix + g_tab).Append("ec = HDF_ERR_INVALID_PARAM;\n");
-    sb.Append(prefix + g_tab).Append("goto errors;\n");
-    sb.Append(prefix).Append("}\n");
-}
-
 void ASTShortType::EmitCppWriteVar(const String& parcelName, const String& name, StringBuilder& sb,
     const String& prefix, unsigned int innerLevel) const
 {
@@ -127,14 +127,14 @@ void ASTShortType::EmitCMarshalling(const String& name, StringBuilder& sb, const
     sb.Append(prefix).Append("}\n");
 }
 
-void ASTShortType::EmitCUnMarshalling(const String& name, StringBuilder& sb, const String& prefix,
-    std::vector<String>& freeObjStatements) const
+void ASTShortType::EmitCUnMarshalling(const String& name, const String& gotoLabel, StringBuilder& sb,
+    const String& prefix, std::vector<String>& freeObjStatements) const
 {
     sb.Append(prefix).AppendFormat("if (!HdfSbufReadInt16(data, &%s)) {\n", name.string());
     sb.Append(prefix + g_tab).AppendFormat(
         "HDF_LOGE(\"%%{public}s: read %s failed!\", __func__);\n", name.string());
     EmitFreeStatements(freeObjStatements, sb, prefix + g_tab);
-    sb.Append(prefix + g_tab).Append("goto errors;\n");
+    sb.Append(prefix + g_tab).AppendFormat("goto %s;\n", gotoLabel.string());
     sb.Append(prefix).Append("}\n");
 }
 
diff --git a/tools/hdi-gen/ast/ast_short_type.h b/tools/hdi-gen/ast/ast_short_type.h
index 1b5e7642..d49c09c4 100755
--- a/tools/hdi-gen/ast/ast_short_type.h
+++ b/tools/hdi-gen/ast/ast_short_type.h
@@ -27,14 +27,14 @@ public:
 
     String EmitJavaType(TypeMode mode, bool isInnerType = false) const override;
 
-    void EmitCWriteVar(const String& parcelName, const String& name, const String& gotoLabel,
-        StringBuilder& sb, const String& prefix) const override;
-
-    void EmitCProxyReadVar(const String& parcelName, const String& name, bool isInnerType,
+    void EmitCWriteVar(const String& parcelName, const String& name, const String& ecName,
         const String& gotoLabel, StringBuilder& sb, const String& prefix) const override;
 
-    void EmitCStubReadVar(const String& parcelName, const String& name, StringBuilder& sb,
-        const String& prefix) const override;
+    void EmitCProxyReadVar(const String& parcelName, const String& name, bool isInnerType, const String& ecName,
+        const String& gotoLabel, StringBuilder& sb, const String& prefix) const override;
+
+    void EmitCStubReadVar(const String& parcelName, const String& name, const String& ecName,
+        const String& gotoLabel, StringBuilder& sb, const String& prefix) const override;
 
     void EmitCppWriteVar(const String& parcelName, const String& name, StringBuilder& sb,
         const String& prefix, unsigned int innerLevel = 0) const override;
@@ -44,7 +44,7 @@ public:
 
     void EmitCMarshalling(const String& name, StringBuilder& sb, const String& prefix) const override;
 
-    void EmitCUnMarshalling(const String& name, StringBuilder& sb, const String& prefix,
+    void EmitCUnMarshalling(const String& name, const String& gotoLabel, StringBuilder& sb, const String& prefix,
         std::vector<String>& freeObjStatements) const override;
 
     void EmitCppMarshalling(const String& parcelName, const String& name, StringBuilder& sb,
diff --git a/tools/hdi-gen/ast/ast_string_type.cpp b/tools/hdi-gen/ast/ast_string_type.cpp
index a3c891b1..1fed0f4e 100755
--- a/tools/hdi-gen/ast/ast_string_type.cpp
+++ b/tools/hdi-gen/ast/ast_string_type.cpp
@@ -33,7 +33,7 @@ String ASTStringType::EmitCType(TypeMode mode) const
         case TypeMode::PARAM_IN:
             return "const char*";
         case TypeMode::PARAM_OUT:
-            return "char**";
+            return "char*";
         case TypeMode::LOCAL_VAR:
             return "char*";
         default:
@@ -62,19 +62,45 @@ String ASTStringType::EmitJavaType(TypeMode mode, bool isInnerType) const
     return "String";
 }
 
-void ASTStringType::EmitCWriteVar(const String& parcelName, const String& name, const String& gotoLabel,
-    StringBuilder& sb, const String& prefix) const
+void ASTStringType::EmitCWriteVar(const String& parcelName, const String& name, const String& ecName,
+    const String& gotoLabel, StringBuilder& sb, const String& prefix) const
 {
     sb.Append(prefix).AppendFormat("if (!HdfSbufWriteString(%s, %s)) {\n",
         parcelName.string(), name.string());
     sb.Append(prefix + g_tab).AppendFormat(
         "HDF_LOGE(\"%%{public}s: write %s failed!\", __func__);\n", name.string());
-    sb.Append(prefix + g_tab).Append("ec = HDF_ERR_INVALID_PARAM;\n");
+    sb.Append(prefix + g_tab).AppendFormat("%s = HDF_ERR_INVALID_PARAM;\n", ecName.string());
+    sb.Append(prefix + g_tab).AppendFormat("goto %s;\n", gotoLabel.string());
+    sb.Append(prefix).Append("}\n");
+}
+
+void ASTStringType::EmitCProxyWriteOutVar(const String& parcelName, const String& name, const String& ecName,
+    const String& gotoLabel, StringBuilder& sb, const String& prefix) const
+{
+    String lenName = String::Format("%sLen", name.string());
+    sb.Append(prefix).AppendFormat("if (!HdfSbufWriteUint32(%s, %s)) {\n",
+        parcelName.string(), lenName.string());
+    sb.Append(prefix + g_tab).AppendFormat(
+        "HDF_LOGE(\"%%{public}s: write %s failed!\", __func__);\n", name.string());
+    sb.Append(prefix + g_tab).AppendFormat("%s = HDF_ERR_INVALID_PARAM;\n", ecName.string());
     sb.Append(prefix + g_tab).AppendFormat("goto %s;\n", gotoLabel.string());
     sb.Append(prefix).Append("}\n");
 }
 
 void ASTStringType::EmitCProxyReadVar(const String& parcelName, const String& name, bool isInnerType,
+    const String& ecName, const String& gotoLabel, StringBuilder& sb, const String& prefix) const
+{
+    sb.Append(prefix).AppendFormat("const char *%s = HdfSbufReadString(%s);\n",
+        name.string(), parcelName.string());
+    sb.Append(prefix).AppendFormat("if (%s == NULL) {\n", name.string());
+    sb.Append(prefix + g_tab).AppendFormat(
+        "HDF_LOGE(\"%%{public}s: read %s failed!\", __func__);\n", name.string());
+    sb.Append(prefix + g_tab).AppendFormat("%s = HDF_ERR_INVALID_PARAM;\n", ecName.string());
+    sb.Append(prefix + g_tab).AppendFormat("goto %s;\n", gotoLabel.string());
+    sb.Append(prefix).Append("}\n");
+}
+
+void ASTStringType::EmitCStubReadVar(const String& parcelName, const String& name, const String& ecName,
     const String& gotoLabel, StringBuilder& sb, const String& prefix) const
 {
     sb.Append(prefix).AppendFormat("const char *%s = HdfSbufReadString(%s);\n",
@@ -82,21 +108,32 @@ void ASTStringType::EmitCProxyReadVar(const String& parcelName, const String& na
     sb.Append(prefix).AppendFormat("if (%s == NULL) {\n", name.string());
     sb.Append(prefix + g_tab).AppendFormat(
         "HDF_LOGE(\"%%{public}s: read %s failed!\", __func__);\n", name.string());
-    sb.Append(prefix + g_tab).Append("ec = HDF_ERR_INVALID_PARAM;\n");
+    sb.Append(prefix + g_tab).AppendFormat("%s = HDF_ERR_INVALID_PARAM;\n", ecName.string());
     sb.Append(prefix + g_tab).AppendFormat("goto %s;\n", gotoLabel.string());
     sb.Append(prefix).Append("}\n");
 }
 
-void ASTStringType::EmitCStubReadVar(const String& parcelName, const String& name, StringBuilder& sb,
-    const String& prefix) const
+void ASTStringType::EmitCStubReadOutVar(const String& parcelName, const String& name, const String& ecName,
+    const String& gotoLabel, StringBuilder& sb, const String& prefix) const
 {
-    sb.Append(prefix).AppendFormat("const char *%s = HdfSbufReadString(%s);\n",
-        name.string(), parcelName.string());
-    sb.Append(prefix).AppendFormat("if (%s == NULL) {\n", name.string());
+    String lenName = String::Format("%sLen", name.string());
+    sb.Append(prefix).AppendFormat("if (!HdfSbufReadUint32(%s, &%s)) {\n",
+        parcelName.string(), lenName.string());
     sb.Append(prefix + g_tab).AppendFormat(
-        "HDF_LOGE(\"%%{public}s: read %s failed!\", __func__);\n", name.string());
-    sb.Append(prefix + g_tab).Append("ec = HDF_ERR_INVALID_PARAM;\n");
-    sb.Append(prefix + g_tab).Append("goto errors;\n");
+        "HDF_LOGE(\"%%{public}s: read %s size failed!\", __func__);\n", name.string());
+    sb.Append(prefix + g_tab).AppendFormat("%s = HDF_ERR_INVALID_PARAM;\n", ecName.string());
+    sb.Append(prefix + g_tab).AppendFormat("goto %s;\n", gotoLabel.string());
+    sb.Append(prefix).Append("}\n\n");
+
+    sb.Append(prefix).AppendFormat("if (%s > 0) {\n", lenName.string());
+    sb.Append(prefix + g_tab).AppendFormat("%s = (%s)OsalMemCalloc(%s);\n", name.string(), EmitCType().string(),
+        lenName.string());
+    sb.Append(prefix + g_tab).AppendFormat("if (%s == NULL) {\n", name.string());
+    sb.Append(prefix + g_tab + g_tab).AppendFormat("HDF_LOGE(\"%%{public}s: malloc %s failed\", __func__);\n",
+        name.string());
+    sb.Append(prefix + g_tab + g_tab).AppendFormat("%s = HDF_ERR_MALLOC_FAIL;\n", ecName.string());
+    sb.Append(prefix + g_tab + g_tab).AppendFormat("goto %s;\n", gotoLabel.string());
+    sb.Append(prefix + g_tab).Append("}\n");
     sb.Append(prefix).Append("}\n");
 }
 
@@ -130,15 +167,15 @@ void ASTStringType::EmitCMarshalling(const String& name, StringBuilder& sb, cons
     sb.Append(prefix).Append("}\n");
 }
 
-void ASTStringType::EmitCUnMarshalling(const String& name, StringBuilder& sb, const String& prefix,
-    std::vector<String>& freeObjStatements) const
+void ASTStringType::EmitCUnMarshalling(const String& name, const String& gotoLabel, StringBuilder& sb,
+    const String& prefix, std::vector<String>& freeObjStatements) const
 {
     sb.Append(prefix).AppendFormat("const char *%s = HdfSbufReadString(data);\n", name.string());
     sb.Append(prefix).AppendFormat("if (%s == NULL) {\n", name.string());
     sb.Append(prefix + g_tab).AppendFormat(
         "HDF_LOGE(\"%%{public}s: read %s failed!\", __func__);\n", name.string());
     EmitFreeStatements(freeObjStatements, sb, prefix + g_tab);
-    sb.Append(prefix + g_tab).Append("goto errors;\n");
+    sb.Append(prefix + g_tab).AppendFormat("goto %s;\n", gotoLabel.string());
     sb.Append(prefix).Append("}\n");
 }
 
@@ -167,10 +204,9 @@ void ASTStringType::EmitCppUnMarshalling(const String& parcelName, const String&
 void ASTStringType::EmitMemoryRecycle(const String& name, bool isClient, bool ownership, StringBuilder& sb,
     const String& prefix) const
 {
-    String varName = isClient ? String::Format("*%s", name.string()) : name;
-    sb.Append(prefix).AppendFormat("if (%s != NULL) {\n", varName.string());
-    sb.Append(prefix + g_tab).AppendFormat("OsalMemFree(%s);\n", varName.string());
-    sb.Append(prefix + g_tab).AppendFormat("%s = NULL;\n", varName.string());
+    sb.Append(prefix).AppendFormat("if (%s != NULL) {\n", name.string());
+    sb.Append(prefix + g_tab).AppendFormat("OsalMemFree(%s);\n", name.string());
+    sb.Append(prefix + g_tab).AppendFormat("%s = NULL;\n", name.string());
     sb.Append(prefix).Append("}\n");
 }
 
diff --git a/tools/hdi-gen/ast/ast_string_type.h b/tools/hdi-gen/ast/ast_string_type.h
index 55f67076..e6088e22 100755
--- a/tools/hdi-gen/ast/ast_string_type.h
+++ b/tools/hdi-gen/ast/ast_string_type.h
@@ -27,14 +27,20 @@ public:
 
     String EmitJavaType(TypeMode mode, bool isInnerType = false) const override;
 
-    void EmitCWriteVar(const String& parcelName, const String& name, const String& gotoLabel,
-        StringBuilder& sb, const String& prefix) const override;
-
-    void EmitCProxyReadVar(const String& parcelName, const String& name, bool isInnerType,
+    void EmitCWriteVar(const String& parcelName, const String& name, const String& ecName,
         const String& gotoLabel, StringBuilder& sb, const String& prefix) const override;
 
-    void EmitCStubReadVar(const String& parcelName, const String& name, StringBuilder& sb,
-        const String& prefix) const override;
+    void EmitCProxyWriteOutVar(const String& parcelName, const String& name, const String& ecName,
+        const String& gotoLabel, StringBuilder& sb, const String& prefix) const override;
+
+    void EmitCProxyReadVar(const String& parcelName, const String& name, bool isInnerType, const String& ecName,
+        const String& gotoLabel, StringBuilder& sb, const String& prefix) const override;
+
+    void EmitCStubReadVar(const String& parcelName, const String& name, const String& ecName,
+        const String& gotoLabel, StringBuilder& sb, const String& prefix) const override;
+
+    void EmitCStubReadOutVar(const String& parcelName, const String& name, const String& ecName,
+        const String& gotoLabel, StringBuilder& sb, const String& prefix) const override;
 
     void EmitCppWriteVar(const String& parcelName, const String& name, StringBuilder& sb,
         const String& prefix, unsigned int innerLevel = 0) const override;
@@ -44,7 +50,7 @@ public:
 
     void EmitCMarshalling(const String& name, StringBuilder& sb, const String& prefix) const override;
 
-    void EmitCUnMarshalling(const String& name, StringBuilder& sb, const String& prefix,
+    void EmitCUnMarshalling(const String& name, const String& gotoLabel, StringBuilder& sb, const String& prefix,
         std::vector<String>& freeObjStatements) const override;
 
     void EmitCppMarshalling(const String& parcelName, const String& name, StringBuilder& sb,
diff --git a/tools/hdi-gen/ast/ast_struct_type.cpp b/tools/hdi-gen/ast/ast_struct_type.cpp
index 474c12d6..d4ac962b 100755
--- a/tools/hdi-gen/ast/ast_struct_type.cpp
+++ b/tools/hdi-gen/ast/ast_struct_type.cpp
@@ -77,7 +77,7 @@ String ASTStructType::EmitCType(TypeMode mode) const
         case TypeMode::PARAM_IN:
             return String::Format("const struct %s*", name_.string());
         case TypeMode::PARAM_OUT:
-            return String::Format("struct %s**", name_.string());
+            return String::Format("struct %s*", name_.string());
         case TypeMode::LOCAL_VAR:
             return String::Format("struct %s*", name_.string());
         default:
@@ -147,40 +147,53 @@ String ASTStructType::EmitJavaTypeDecl() const
     return sb.ToString();
 }
 
-void ASTStructType::EmitCWriteVar(const String& parcelName, const String& name, const String& gotoLabel,
-    StringBuilder& sb, const String& prefix) const
+void ASTStructType::EmitCWriteVar(const String& parcelName, const String& name, const String& ecName,
+    const String& gotoLabel, StringBuilder& sb, const String& prefix) const
 {
     sb.Append(prefix).AppendFormat("if (!%sBlockMarshalling(%s, %s)) {\n",
         name_.string(), parcelName.string(), name.string());
     sb.Append(prefix + g_tab).AppendFormat(
         "HDF_LOGE(\"%%{public}s: write %s failed!\", __func__);\n", name.string());
-    sb.Append(prefix + g_tab).Append("ec = HDF_ERR_INVALID_PARAM;\n");
+    sb.Append(prefix + g_tab).AppendFormat("%s = HDF_ERR_INVALID_PARAM;\n", ecName.string());
     sb.Append(prefix + g_tab).AppendFormat("goto %s;\n", gotoLabel.string());
     sb.Append(prefix).Append("}\n");
 }
 
 void ASTStructType::EmitCProxyReadVar(const String& parcelName, const String& name, bool isInnerType,
+    const String& ecName, const String& gotoLabel, StringBuilder& sb, const String& prefix) const
+{
+    sb.Append(prefix).AppendFormat("if (!%sBlockUnmarshalling(%s, %s)) {\n",
+        name_.string(), parcelName.string(), name.string());
+    sb.Append(prefix + g_tab).AppendFormat(
+        "HDF_LOGE(\"%%{public}s: read %s failed!\", __func__);\n", name.string());
+    sb.Append(prefix + g_tab).AppendFormat("%s = HDF_ERR_INVALID_PARAM;\n", ecName.string());
+    sb.Append(prefix + g_tab).AppendFormat("goto %s;\n", gotoLabel.string());
+    sb.Append(prefix).Append("}\n");
+}
+
+void ASTStructType::EmitCStubReadVar(const String& parcelName, const String& name, const String& ecName,
     const String& gotoLabel, StringBuilder& sb, const String& prefix) const
 {
     sb.Append(prefix).AppendFormat("if (!%sBlockUnmarshalling(%s, %s)) {\n",
         name_.string(), parcelName.string(), name.string());
     sb.Append(prefix + g_tab).AppendFormat(
         "HDF_LOGE(\"%%{public}s: read %s failed!\", __func__);\n", name.string());
-    sb.Append(prefix + g_tab).Append("ec = HDF_ERR_INVALID_PARAM;\n");
+    sb.Append(prefix + g_tab).AppendFormat("%s = HDF_ERR_INVALID_PARAM;\n", ecName.string());
     sb.Append(prefix + g_tab).AppendFormat("goto %s;\n", gotoLabel.string());
-    sb.Append(prefix).Append("}\n");
+    sb.Append(prefix).AppendFormat("}\n");
 }
 
-void ASTStructType::EmitCStubReadVar(const String& parcelName, const String& name, StringBuilder& sb,
-    const String& prefix) const
+void ASTStructType::EmitCStubReadOutVar(const String& parcelName, const String& name, const String& ecName,
+    const String& gotoLabel, StringBuilder& sb, const String& prefix) const
 {
-    sb.Append(prefix).AppendFormat("if (!%sBlockUnmarshalling(%s, %s)) {\n",
-        name_.string(), parcelName.string(), name.string());
-    sb.Append(prefix + g_tab).AppendFormat(
-        "HDF_LOGE(\"%%{public}s: read %s failed!\", __func__);\n", name.string());
-    sb.Append(prefix + g_tab).Append("ec = HDF_ERR_INVALID_PARAM;\n");
-    sb.Append(prefix + g_tab).Append("goto errors;\n");
-    sb.Append(prefix).AppendFormat("}\n");
+    sb.Append(prefix).AppendFormat("%s = (%s*)OsalMemCalloc(sizeof(%s));\n", name.string(),
+        EmitCType(TypeMode::NO_MODE).string(), EmitCType(TypeMode::NO_MODE).string());
+    sb.Append(prefix).AppendFormat("if (%s == NULL) {\n", name.string());
+    sb.Append(prefix + g_tab).AppendFormat("HDF_LOGE(\"%%{public}s: malloc %s failed\", __func__);\n",
+        name.string());
+    sb.Append(prefix + g_tab).AppendFormat("%s = HDF_ERR_MALLOC_FAIL;\n", ecName.string());
+    sb.Append(prefix + g_tab).AppendFormat("goto %s;\n", gotoLabel.string());
+    sb.Append(prefix).Append("}\n");
 }
 
 void ASTStructType::EmitCppWriteVar(const String& parcelName, const String& name, StringBuilder& sb,
@@ -217,14 +230,14 @@ void ASTStructType::EmitCMarshalling(const String& name, StringBuilder& sb, cons
     sb.Append(prefix).Append("}\n");
 }
 
-void ASTStructType::EmitCUnMarshalling(const String& name, StringBuilder& sb, const String& prefix,
-    std::vector<String>& freeObjStatements) const
+void ASTStructType::EmitCUnMarshalling(const String& name, const String& gotoLabel, StringBuilder& sb,
+    const String& prefix, std::vector<String>& freeObjStatements) const
 {
     sb.Append(prefix).AppendFormat("if (!%sBlockUnmarshalling(data, %s)) {\n",
         name_.string(), name.string());
     sb.Append(prefix + g_tab).AppendFormat(
         "HDF_LOGE(\"%%{public}s: read %s failed!\", __func__);\n", name.string());
-    sb.Append(prefix + g_tab).Append("goto errors;\n");
+    sb.Append(prefix + g_tab).AppendFormat("goto %s;\n", gotoLabel.string());
     sb.Append(prefix).Append("}\n");
 }
 
@@ -253,7 +266,7 @@ void ASTStructType::EmitCppUnMarshalling(const String& parcelName, const String&
 void ASTStructType::EmitMemoryRecycle(const String& name, bool isClient, bool ownership, StringBuilder& sb,
     const String& prefix) const
 {
-    String varName = isClient ? String::Format("*%s", name.string()) : name;
+    String varName = name;
     if (ownership) {
         sb.Append(prefix).AppendFormat("if (%s != NULL) {\n", varName.string());
         sb.Append(prefix + g_tab).AppendFormat("%sFree(%s, true);\n", name_.string(), varName.string());
diff --git a/tools/hdi-gen/ast/ast_struct_type.h b/tools/hdi-gen/ast/ast_struct_type.h
index 3eb3f246..dfb5ea0a 100755
--- a/tools/hdi-gen/ast/ast_struct_type.h
+++ b/tools/hdi-gen/ast/ast_struct_type.h
@@ -92,14 +92,17 @@ public:
 
     String EmitJavaTypeDecl() const;
 
-    void EmitCWriteVar(const String& parcelName, const String& name, const String& gotoLabel,
-        StringBuilder& sb, const String& prefix) const override;
-
-    void EmitCProxyReadVar(const String& parcelName, const String& name, bool isInnerType,
+    void EmitCWriteVar(const String& parcelName, const String& name, const String& ecName,
         const String& gotoLabel, StringBuilder& sb, const String& prefix) const override;
 
-    void EmitCStubReadVar(const String& parcelName, const String& name, StringBuilder& sb,
-        const String& prefix) const override;
+    void EmitCProxyReadVar(const String& parcelName, const String& name, bool isInnerType, const String& ecName,
+        const String& gotoLabel, StringBuilder& sb, const String& prefix) const override;
+
+    void EmitCStubReadVar(const String& parcelName, const String& name, const String& ecName,
+        const String& gotoLabel, StringBuilder& sb, const String& prefix) const override;
+
+    void EmitCStubReadOutVar(const String& parcelName, const String& name, const String& ecName,
+        const String& gotoLabel, StringBuilder& sb, const String& prefix) const override;
 
     void EmitCppWriteVar(const String& parcelName, const String& name, StringBuilder& sb,
         const String& prefix, unsigned int innerLevel = 0) const override;
@@ -109,7 +112,7 @@ public:
 
     void EmitCMarshalling(const String& name, StringBuilder& sb, const String& prefix) const override;
 
-    void EmitCUnMarshalling(const String& name, StringBuilder& sb, const String& prefix,
+    void EmitCUnMarshalling(const String& name, const String& gotoLabel, StringBuilder& sb, const String& prefix,
         std::vector<String>& freeObjStatements) const override;
 
     void EmitCppMarshalling(const String& parcelName, const String& name, StringBuilder& sb,
diff --git a/tools/hdi-gen/ast/ast_type.cpp b/tools/hdi-gen/ast/ast_type.cpp
index b1a9b1da..9cf45ff2 100755
--- a/tools/hdi-gen/ast/ast_type.cpp
+++ b/tools/hdi-gen/ast/ast_type.cpp
@@ -177,20 +177,32 @@ String ASTType::EmitJavaType(TypeMode mode, bool isInnerType) const
     return "unknow";
 }
 
-void ASTType::EmitCWriteVar(const String& parcelName, const String& name, const String& gotoLabel,
-    StringBuilder& sb, const String& prefix) const
+void ASTType::EmitCWriteVar(const String& parcelName, const String& name, const String& ecName,
+    const String& gotoLabel, StringBuilder& sb, const String& prefix) const
 {
-    sb.Append(prefix).AppendFormat("//Writeing \"%s\" type of data is not supported\n", name_.string());
+    sb.Append(prefix).AppendFormat("//Writing \"%s\" type of data is not supported\n", name_.string());
+}
+
+void ASTType::EmitCProxyWriteOutVar(const String& parcelName, const String& name, const String& ecName,
+    const String& gotoLabel, StringBuilder& sb, const String& prefix) const
+{
+    sb.Append(prefix).AppendFormat("//Writing \"%s\" type of data is not supported\n", name_.string());
 }
 
 void ASTType::EmitCProxyReadVar(const String& parcelName, const String& name, bool isInnerType,
+    const String& ecName, const String& gotoLabel, StringBuilder& sb, const String& prefix) const
+{
+    sb.Append(prefix).AppendFormat("//Reading \"%s\" type of data is not supported\n", name_.string());
+}
+
+void ASTType::EmitCStubReadVar(const String& parcelName, const String& name, const String& ecName,
     const String& gotoLabel, StringBuilder& sb, const String& prefix) const
 {
     sb.Append(prefix).AppendFormat("//Reading \"%s\" type of data is not supported\n", name_.string());
 }
 
-void ASTType::EmitCStubReadVar(const String& parcelName, const String& name, StringBuilder& sb,
-    const String& prefix) const
+void ASTType::EmitCStubReadOutVar(const String& parcelName, const String& name, const String& ecName,
+    const String& gotoLabel, StringBuilder& sb, const String& prefix) const
 {
     sb.Append(prefix).AppendFormat("//Reading \"%s\" type of data is not supported\n", name_.string());
 }
@@ -212,8 +224,8 @@ void ASTType::EmitCMarshalling(const String& name, StringBuilder& sb, const Stri
     sb.Append(prefix).AppendFormat("//Writing \"%s\" type of data is not supported\n", name_.string());
 }
 
-void ASTType::EmitCUnMarshalling(const String& name, StringBuilder& sb, const String& prefix,
-    std::vector<String>& freeObjStatements) const
+void ASTType::EmitCUnMarshalling(const String& name, const String& gotoLabel, StringBuilder& sb,
+    const String& prefix, std::vector<String>& freeObjStatements) const
 {
     sb.Append(prefix).AppendFormat("//Reading \"%s\" type of data is not supported\n", name_.string());
 }
diff --git a/tools/hdi-gen/ast/ast_type.h b/tools/hdi-gen/ast/ast_type.h
index 09d4955d..6438a2d4 100755
--- a/tools/hdi-gen/ast/ast_type.h
+++ b/tools/hdi-gen/ast/ast_type.h
@@ -126,14 +126,20 @@ public:
 
     virtual String EmitJavaType(TypeMode mode, bool isInnerType = false) const;
 
-    virtual void EmitCWriteVar(const String& parcelName, const String& name, const String& gotoLabel,
-        StringBuilder& sb, const String& prefix) const;
-
-    virtual void EmitCProxyReadVar(const String& parcelName, const String& name, bool isInnerType,
+    virtual void EmitCWriteVar(const String& parcelName, const String& name, const String& ecName,
         const String& gotoLabel, StringBuilder& sb, const String& prefix) const;
 
-    virtual void EmitCStubReadVar(const String& parcelName, const String& name, StringBuilder& sb,
-        const String& prefix) const;
+    virtual void EmitCProxyWriteOutVar(const String& parcelName, const String& name, const String& ecName,
+        const String& gotoLabel, StringBuilder& sb, const String& prefix) const;
+
+    virtual void EmitCProxyReadVar(const String& parcelName, const String& name, bool isInnerType,
+        const String& ecName, const String& gotoLabel, StringBuilder& sb, const String& prefix) const;
+
+    virtual void EmitCStubReadVar(const String& parcelName, const String& name, const String& ecName,
+        const String& gotoLabel, StringBuilder& sb, const String& prefix) const;
+
+    virtual void EmitCStubReadOutVar(const String& parcelName, const String& name, const String& ecName,
+        const String& gotoLabel, StringBuilder& sb, const String& prefix) const;
 
     virtual void EmitCppWriteVar(const String& parcelName, const String& name, StringBuilder& sb,
         const String& prefix, unsigned int innerLevel = 0) const;
@@ -143,8 +149,8 @@ public:
 
     virtual void EmitCMarshalling(const String& name, StringBuilder& sb, const String& prefix) const;
 
-    virtual void EmitCUnMarshalling(const String& name, StringBuilder& sb, const String& prefix,
-        std::vector<String>& freeObjStatements) const;
+    virtual void EmitCUnMarshalling(const String& name, const String& gotoLabel, StringBuilder& sb,
+        const String& prefix, std::vector<String>& freeObjStatements) const;
 
     void EmitFreeStatements(const std::vector<String>& freeObjStatements, StringBuilder& sb,
         const String& prefix) const;
diff --git a/tools/hdi-gen/ast/ast_uchar_type.cpp b/tools/hdi-gen/ast/ast_uchar_type.cpp
index 94e17782..0ce0b48a 100755
--- a/tools/hdi-gen/ast/ast_uchar_type.cpp
+++ b/tools/hdi-gen/ast/ast_uchar_type.cpp
@@ -63,40 +63,40 @@ String ASTUcharType::EmitJavaType(TypeMode mode, bool isInnerType) const
     return "/";
 }
 
-void ASTUcharType::EmitCWriteVar(const String& parcelName, const String& name, const String& gotoLabel,
-    StringBuilder& sb, const String& prefix) const
+void ASTUcharType::EmitCWriteVar(const String& parcelName, const String& name, const String& ecName,
+    const String& gotoLabel, StringBuilder& sb, const String& prefix) const
 {
     sb.Append(prefix).AppendFormat("if (!HdfSbufWriteUint8(%s, %s)) {\n",
         parcelName.string(), name.string());
     sb.Append(prefix + g_tab).AppendFormat(
         "HDF_LOGE(\"%%{public}s: write %s failed!\", __func__);\n", name.string());
-    sb.Append(prefix + g_tab).Append("ec = HDF_ERR_INVALID_PARAM;\n");
+    sb.Append(prefix + g_tab).AppendFormat("%s = HDF_ERR_INVALID_PARAM;\n", ecName.string());
     sb.Append(prefix + g_tab).AppendFormat("goto %s;\n", gotoLabel.string());
     sb.Append(prefix).Append("}\n");
 }
 
 void ASTUcharType::EmitCProxyReadVar(const String& parcelName, const String& name, bool isInnerType,
+    const String& ecName, const String& gotoLabel, StringBuilder& sb, const String& prefix) const
+{
+    sb.Append(prefix).AppendFormat("if (!HdfSbufReadUint8(%s, %s)) {\n", parcelName.string(), name.string());
+    sb.Append(prefix + g_tab).AppendFormat(
+        "HDF_LOGE(\"%%{public}s: read %s failed!\", __func__);\n", name.string());
+    sb.Append(prefix + g_tab).AppendFormat("%s = HDF_ERR_INVALID_PARAM;\n", ecName.string());
+    sb.Append(prefix + g_tab).AppendFormat("goto %s;\n", gotoLabel.string());
+    sb.Append(prefix).Append("}\n");
+}
+
+void ASTUcharType::EmitCStubReadVar(const String& parcelName, const String& name, const String& ecName,
     const String& gotoLabel, StringBuilder& sb, const String& prefix) const
 {
     sb.Append(prefix).AppendFormat("if (!HdfSbufReadUint8(%s, %s)) {\n", parcelName.string(), name.string());
     sb.Append(prefix + g_tab).AppendFormat(
         "HDF_LOGE(\"%%{public}s: read %s failed!\", __func__);\n", name.string());
-    sb.Append(prefix + g_tab).Append("ec = HDF_ERR_INVALID_PARAM;\n");
+    sb.Append(prefix + g_tab).AppendFormat("%s = HDF_ERR_INVALID_PARAM;\n", ecName.string());
     sb.Append(prefix + g_tab).AppendFormat("goto %s;\n", gotoLabel.string());
     sb.Append(prefix).Append("}\n");
 }
 
-void ASTUcharType::EmitCStubReadVar(const String& parcelName, const String& name, StringBuilder& sb,
-    const String& prefix) const
-{
-    sb.Append(prefix).AppendFormat("if (!HdfSbufReadUint8(%s, %s)) {\n", parcelName.string(), name.string());
-    sb.Append(prefix + g_tab).AppendFormat(
-        "HDF_LOGE(\"%%{public}s: read %s failed!\", __func__);\n", name.string());
-    sb.Append(prefix + g_tab).Append("ec = HDF_ERR_INVALID_PARAM;\n");
-    sb.Append(prefix + g_tab).Append("goto errors;\n");
-    sb.Append(prefix).Append("}\n");
-}
-
 void ASTUcharType::EmitCppWriteVar(const String& parcelName, const String& name, StringBuilder& sb,
     const String& prefix, unsigned int innerLevel) const
 {
@@ -127,14 +127,14 @@ void ASTUcharType::EmitCMarshalling(const String& name, StringBuilder& sb, const
     sb.Append(prefix).Append("}\n");
 }
 
-void ASTUcharType::EmitCUnMarshalling(const String& name, StringBuilder& sb, const String& prefix,
-    std::vector<String>& freeObjStatements) const
+void ASTUcharType::EmitCUnMarshalling(const String& name, const String& gotoLabel, StringBuilder& sb,
+    const String& prefix, std::vector<String>& freeObjStatements) const
 {
     sb.Append(prefix).AppendFormat("if (!HdfSbufReadUint8(data, &%s)) {\n", name.string());
     sb.Append(prefix + g_tab).AppendFormat(
         "HDF_LOGE(\"%%{public}s: read %s failed!\", __func__);\n", name.string());
     EmitFreeStatements(freeObjStatements, sb, prefix + g_tab);
-    sb.Append(prefix + g_tab).Append("goto errors;\n");
+    sb.Append(prefix + g_tab).AppendFormat("goto %s;\n", gotoLabel.string());
     sb.Append(prefix).Append("}\n");
 }
 
diff --git a/tools/hdi-gen/ast/ast_uchar_type.h b/tools/hdi-gen/ast/ast_uchar_type.h
index 87cd0615..edd4c65b 100755
--- a/tools/hdi-gen/ast/ast_uchar_type.h
+++ b/tools/hdi-gen/ast/ast_uchar_type.h
@@ -27,14 +27,14 @@ public:
 
     String EmitJavaType(TypeMode mode, bool isInnerType = false) const override;
 
-    void EmitCWriteVar(const String& parcelName, const String& name, const String& gotoLabel,
-        StringBuilder& sb, const String& prefix) const override;
-
-    void EmitCProxyReadVar(const String& parcelName, const String& name, bool isInnerType,
+    void EmitCWriteVar(const String& parcelName, const String& name, const String& ecName,
         const String& gotoLabel, StringBuilder& sb, const String& prefix) const override;
 
-    void EmitCStubReadVar(const String& parcelName, const String& name, StringBuilder& sb,
-        const String& prefix) const override;
+    void EmitCProxyReadVar(const String& parcelName, const String& name, bool isInnerType, const String& ecName,
+        const String& gotoLabel, StringBuilder& sb, const String& prefix) const override;
+
+    void EmitCStubReadVar(const String& parcelName, const String& name, const String& ecName,
+        const String& gotoLabel, StringBuilder& sb, const String& prefix) const override;
 
     void EmitCppWriteVar(const String& parcelName, const String& name, StringBuilder& sb,
         const String& prefix, unsigned int innerLevel = 0) const override;
@@ -44,7 +44,7 @@ public:
 
     void EmitCMarshalling(const String& name, StringBuilder& sb, const String& prefix) const override;
 
-    void EmitCUnMarshalling(const String& name, StringBuilder& sb, const String& prefix,
+    void EmitCUnMarshalling(const String& name, const String& gotoLabel, StringBuilder& sb, const String& prefix,
         std::vector<String>& freeObjStatements) const override;
 
     void EmitCppMarshalling(const String& parcelName, const String& name, StringBuilder& sb,
diff --git a/tools/hdi-gen/ast/ast_uint_type.cpp b/tools/hdi-gen/ast/ast_uint_type.cpp
index 964d61ea..d259c81b 100755
--- a/tools/hdi-gen/ast/ast_uint_type.cpp
+++ b/tools/hdi-gen/ast/ast_uint_type.cpp
@@ -63,40 +63,40 @@ String ASTUintType::EmitJavaType(TypeMode mode, bool isInnerType) const
     return "/";
 }
 
-void ASTUintType::EmitCWriteVar(const String& parcelName, const String& name, const String& gotoLabel,
-    StringBuilder& sb, const String& prefix) const
+void ASTUintType::EmitCWriteVar(const String& parcelName, const String& name, const String& ecName,
+    const String& gotoLabel, StringBuilder& sb, const String& prefix) const
 {
     sb.Append(prefix).AppendFormat("if (!HdfSbufWriteUint32(%s, %s)) {\n",
         parcelName.string(), name.string());
     sb.Append(prefix + g_tab).AppendFormat(
         "HDF_LOGE(\"%%{public}s: write %s failed!\", __func__);\n", name.string());
-    sb.Append(prefix + g_tab).Append("ec = HDF_ERR_INVALID_PARAM;\n");
+    sb.Append(prefix + g_tab).AppendFormat("%s = HDF_ERR_INVALID_PARAM;\n", ecName.string());
     sb.Append(prefix + g_tab).AppendFormat("goto %s;\n", gotoLabel.string());
     sb.Append(prefix).Append("}\n");
 }
 
 void ASTUintType::EmitCProxyReadVar(const String& parcelName, const String& name, bool isInnerType,
+    const String& ecName, const String& gotoLabel, StringBuilder& sb, const String& prefix) const
+{
+    sb.Append(prefix).AppendFormat("if (!HdfSbufReadUint32(%s, %s)) {\n", parcelName.string(), name.string());
+    sb.Append(prefix + g_tab).AppendFormat(
+        "HDF_LOGE(\"%%{public}s: read %s failed!\", __func__);\n", name.string());
+    sb.Append(prefix + g_tab).AppendFormat("%s = HDF_ERR_INVALID_PARAM;\n", ecName.string());
+    sb.Append(prefix + g_tab).AppendFormat("goto %s;\n", gotoLabel.string());
+    sb.Append(prefix).Append("}\n");
+}
+
+void ASTUintType::EmitCStubReadVar(const String& parcelName, const String& name, const String& ecName,
     const String& gotoLabel, StringBuilder& sb, const String& prefix) const
 {
     sb.Append(prefix).AppendFormat("if (!HdfSbufReadUint32(%s, %s)) {\n", parcelName.string(), name.string());
     sb.Append(prefix + g_tab).AppendFormat(
         "HDF_LOGE(\"%%{public}s: read %s failed!\", __func__);\n", name.string());
-    sb.Append(prefix + g_tab).Append("ec = HDF_ERR_INVALID_PARAM;\n");
+    sb.Append(prefix + g_tab).AppendFormat("%s = HDF_ERR_INVALID_PARAM;\n", ecName.string());
     sb.Append(prefix + g_tab).AppendFormat("goto %s;\n", gotoLabel.string());
     sb.Append(prefix).Append("}\n");
 }
 
-void ASTUintType::EmitCStubReadVar(const String& parcelName, const String& name, StringBuilder& sb,
-    const String& prefix) const
-{
-    sb.Append(prefix).AppendFormat("if (!HdfSbufReadUint32(%s, %s)) {\n", parcelName.string(), name.string());
-    sb.Append(prefix + g_tab).AppendFormat(
-        "HDF_LOGE(\"%%{public}s: read %s failed!\", __func__);\n", name.string());
-    sb.Append(prefix + g_tab).Append("ec = HDF_ERR_INVALID_PARAM;\n");
-    sb.Append(prefix + g_tab).Append("goto errors;\n");
-    sb.Append(prefix).Append("}\n");
-}
-
 void ASTUintType::EmitCppWriteVar(const String& parcelName, const String& name, StringBuilder& sb,
     const String& prefix, unsigned int innerLevel) const
 {
@@ -127,14 +127,14 @@ void ASTUintType::EmitCMarshalling(const String& name, StringBuilder& sb, const
     sb.Append(prefix).Append("}\n");
 }
 
-void ASTUintType::EmitCUnMarshalling(const String& name, StringBuilder& sb, const String& prefix,
-    std::vector<String>& freeObjStatements) const
+void ASTUintType::EmitCUnMarshalling(const String& name, const String& gotoLabel, StringBuilder& sb,
+    const String& prefix, std::vector<String>& freeObjStatements) const
 {
     sb.Append(prefix).AppendFormat("if (!HdfSbufReadUint32(data, &%s)) {\n", name.string());
     sb.Append(prefix + g_tab).AppendFormat(
         "HDF_LOGE(\"%%{public}s: read %s failed!\", __func__);\n", name.string());
     EmitFreeStatements(freeObjStatements, sb, prefix + g_tab);
-    sb.Append(prefix + g_tab).Append("goto errors;\n");
+    sb.Append(prefix + g_tab).AppendFormat("goto %s;\n", gotoLabel.string());
     sb.Append(prefix).Append("}\n");
 }
 
diff --git a/tools/hdi-gen/ast/ast_uint_type.h b/tools/hdi-gen/ast/ast_uint_type.h
index d33e9fcd..a63fd9bf 100755
--- a/tools/hdi-gen/ast/ast_uint_type.h
+++ b/tools/hdi-gen/ast/ast_uint_type.h
@@ -27,14 +27,14 @@ public:
 
     String EmitJavaType(TypeMode mode, bool isInnerType = false) const override;
 
-    void EmitCWriteVar(const String& parcelName, const String& name, const String& gotoLabel,
-        StringBuilder& sb, const String& prefix) const override;
-
-    void EmitCProxyReadVar(const String& parcelName, const String& name, bool isInnerType,
+    void EmitCWriteVar(const String& parcelName, const String& name, const String& ecName,
         const String& gotoLabel, StringBuilder& sb, const String& prefix) const override;
 
-    void EmitCStubReadVar(const String& parcelName, const String& name, StringBuilder& sb,
-        const String& prefix) const override;
+    void EmitCProxyReadVar(const String& parcelName, const String& name, bool isInnerType, const String& ecName,
+        const String& gotoLabel, StringBuilder& sb, const String& prefix) const override;
+
+    void EmitCStubReadVar(const String& parcelName, const String& name, const String& ecName,
+        const String& gotoLabel, StringBuilder& sb, const String& prefix) const override;
 
     void EmitCppWriteVar(const String& parcelName, const String& name, StringBuilder& sb,
         const String& prefix, unsigned int innerLevel = 0) const override;
@@ -44,7 +44,7 @@ public:
 
     void EmitCMarshalling(const String& name, StringBuilder& sb, const String& prefix) const override;
 
-    void EmitCUnMarshalling(const String& name, StringBuilder& sb, const String& prefix,
+    void EmitCUnMarshalling(const String& name, const String& gotoLabel, StringBuilder& sb, const String& prefix,
         std::vector<String>& freeObjStatements) const override;
 
     void EmitCppMarshalling(const String& parcelName, const String& name, StringBuilder& sb,
diff --git a/tools/hdi-gen/ast/ast_ulong_type.cpp b/tools/hdi-gen/ast/ast_ulong_type.cpp
index dd09f23f..30c41e17 100755
--- a/tools/hdi-gen/ast/ast_ulong_type.cpp
+++ b/tools/hdi-gen/ast/ast_ulong_type.cpp
@@ -63,40 +63,40 @@ String ASTUlongType::EmitJavaType(TypeMode mode, bool isInnerType) const
     return "/";
 }
 
-void ASTUlongType::EmitCWriteVar(const String& parcelName, const String& name, const String& gotoLabel,
-    StringBuilder& sb, const String& prefix) const
+void ASTUlongType::EmitCWriteVar(const String& parcelName, const String& name, const String& ecName,
+    const String& gotoLabel, StringBuilder& sb, const String& prefix) const
 {
     sb.Append(prefix).AppendFormat("if (!HdfSbufWriteUint64(%s, %s)) {\n",
         parcelName.string(), name.string());
     sb.Append(prefix + g_tab).AppendFormat(
         "HDF_LOGE(\"%%{public}s: write %s failed!\", __func__);\n", name.string());
-    sb.Append(prefix + g_tab).Append("ec = HDF_ERR_INVALID_PARAM;\n");
+    sb.Append(prefix + g_tab).AppendFormat("%s = HDF_ERR_INVALID_PARAM;\n", ecName.string());
     sb.Append(prefix + g_tab).AppendFormat("goto %s;\n", gotoLabel.string());
     sb.Append(prefix).Append("}\n");
 }
 
 void ASTUlongType::EmitCProxyReadVar(const String& parcelName, const String& name, bool isInnerType,
+    const String& ecName, const String& gotoLabel, StringBuilder& sb, const String& prefix) const
+{
+    sb.Append(prefix).AppendFormat("if (!HdfSbufReadUint64(%s, %s)) {\n", parcelName.string(), name.string());
+    sb.Append(prefix + g_tab).AppendFormat(
+        "HDF_LOGE(\"%%{public}s: read %s failed!\", __func__);\n", name.string());
+    sb.Append(prefix + g_tab).AppendFormat("%s = HDF_ERR_INVALID_PARAM;\n", ecName.string());
+    sb.Append(prefix + g_tab).AppendFormat("goto %s;\n", gotoLabel.string());
+    sb.Append(prefix).Append("}\n");
+}
+
+void ASTUlongType::EmitCStubReadVar(const String& parcelName, const String& name, const String& ecName,
     const String& gotoLabel, StringBuilder& sb, const String& prefix) const
 {
     sb.Append(prefix).AppendFormat("if (!HdfSbufReadUint64(%s, %s)) {\n", parcelName.string(), name.string());
     sb.Append(prefix + g_tab).AppendFormat(
         "HDF_LOGE(\"%%{public}s: read %s failed!\", __func__);\n", name.string());
-    sb.Append(prefix + g_tab).Append("ec = HDF_ERR_INVALID_PARAM;\n");
+    sb.Append(prefix + g_tab).AppendFormat("%s = HDF_ERR_INVALID_PARAM;\n", ecName.string());
     sb.Append(prefix + g_tab).AppendFormat("goto %s;\n", gotoLabel.string());
     sb.Append(prefix).Append("}\n");
 }
 
-void ASTUlongType::EmitCStubReadVar(const String& parcelName, const String& name, StringBuilder& sb,
-    const String& prefix) const
-{
-    sb.Append(prefix).AppendFormat("if (!HdfSbufReadUint64(%s, %s)) {\n", parcelName.string(), name.string());
-    sb.Append(prefix + g_tab).AppendFormat(
-        "HDF_LOGE(\"%%{public}s: read %s failed!\", __func__);\n", name.string());
-    sb.Append(prefix + g_tab).Append("ec = HDF_ERR_INVALID_PARAM;\n");
-    sb.Append(prefix + g_tab).Append("goto errors;\n");
-    sb.Append(prefix).Append("}\n");
-}
-
 void ASTUlongType::EmitCppWriteVar(const String& parcelName, const String& name, StringBuilder& sb,
     const String& prefix, unsigned int innerLevel) const
 {
@@ -127,14 +127,14 @@ void ASTUlongType::EmitCMarshalling(const String& name, StringBuilder& sb, const
     sb.Append(prefix).Append("}\n");
 }
 
-void ASTUlongType::EmitCUnMarshalling(const String& name, StringBuilder& sb, const String& prefix,
-    std::vector<String>& freeObjStatements) const
+void ASTUlongType::EmitCUnMarshalling(const String& name, const String& gotoLabel, StringBuilder& sb,
+    const String& prefix, std::vector<String>& freeObjStatements) const
 {
     sb.Append(prefix).AppendFormat("if (!HdfSbufReadUint64(data, &%s)) {\n", name.string());
     sb.Append(prefix + g_tab).AppendFormat(
         "HDF_LOGE(\"%%{public}s: read %s failed!\", __func__);\n", name.string());
     EmitFreeStatements(freeObjStatements, sb, prefix + g_tab);
-    sb.Append(prefix + g_tab).Append("goto errors;\n");
+    sb.Append(prefix + g_tab).AppendFormat("goto %s;\n", gotoLabel.string());
     sb.Append(prefix).Append("}\n");
 }
 
diff --git a/tools/hdi-gen/ast/ast_ulong_type.h b/tools/hdi-gen/ast/ast_ulong_type.h
index 9d616eb9..d3875dcf 100755
--- a/tools/hdi-gen/ast/ast_ulong_type.h
+++ b/tools/hdi-gen/ast/ast_ulong_type.h
@@ -27,14 +27,14 @@ public:
 
     String EmitJavaType(TypeMode mode, bool isInnerType = false) const override;
 
-    void EmitCWriteVar(const String& parcelName, const String& name, const String& gotoLabel,
-        StringBuilder& sb, const String& prefix) const override;
-
-    void EmitCProxyReadVar(const String& parcelName, const String& name, bool isInnerType,
+    void EmitCWriteVar(const String& parcelName, const String& name, const String& ecName,
         const String& gotoLabel, StringBuilder& sb, const String& prefix) const override;
 
-    void EmitCStubReadVar(const String& parcelName, const String& name, StringBuilder& sb,
-        const String& prefix) const override;
+    void EmitCProxyReadVar(const String& parcelName, const String& name, bool isInnerType, const String& ecName,
+        const String& gotoLabel, StringBuilder& sb, const String& prefix) const override;
+
+    void EmitCStubReadVar(const String& parcelName, const String& name, const String& ecName,
+        const String& gotoLabel, StringBuilder& sb, const String& prefix) const override;
 
     void EmitCppWriteVar(const String& parcelName, const String& name, StringBuilder& sb,
         const String& prefix, unsigned int innerLevel = 0) const override;
@@ -44,7 +44,7 @@ public:
 
     void EmitCMarshalling(const String& name, StringBuilder& sb, const String& prefix) const override;
 
-    void EmitCUnMarshalling(const String& name, StringBuilder& sb, const String& prefix,
+    void EmitCUnMarshalling(const String& name, const String& gotoLabel, StringBuilder& sb, const String& prefix,
         std::vector<String>& freeObjStatements) const override;
 
     void EmitCppMarshalling(const String& parcelName, const String& name, StringBuilder& sb,
diff --git a/tools/hdi-gen/ast/ast_union_type.cpp b/tools/hdi-gen/ast/ast_union_type.cpp
index 328b4eab..1d123eca 100755
--- a/tools/hdi-gen/ast/ast_union_type.cpp
+++ b/tools/hdi-gen/ast/ast_union_type.cpp
@@ -78,7 +78,7 @@ String ASTUnionType::EmitCType(TypeMode mode) const
         case TypeMode::PARAM_IN:
             return String::Format("const union %s*", name_.string());
         case TypeMode::PARAM_OUT:
-            return String::Format("union %s**", name_.string());
+            return String::Format("union %s*", name_.string());
         case TypeMode::LOCAL_VAR:
             return String::Format("union %s*", name_.string());
         default:
@@ -148,8 +148,8 @@ String ASTUnionType::EmitJavaTypeDecl() const
     return sb.ToString();
 }
 
-void ASTUnionType::EmitCWriteVar(const String& parcelName, const String& name, const String& gotoLabel,
-    StringBuilder& sb, const String& prefix) const
+void ASTUnionType::EmitCWriteVar(const String& parcelName, const String& name, const String& ecName,
+    const String& gotoLabel, StringBuilder& sb, const String& prefix) const
 {
     if (Options::GetInstance().DoGenerateKernelCode()) {
         sb.Append(prefix).AppendFormat("if (!HdfSbufWriteBuffer(%s, (const void *)%s, sizeof(%s))) {\n",
@@ -160,13 +160,13 @@ void ASTUnionType::EmitCWriteVar(const String& parcelName, const String& name, c
     }
     sb.Append(prefix + g_tab).AppendFormat(
         "HDF_LOGE(\"%%{public}s: write %s failed!\", __func__);\n", name.string());
-    sb.Append(prefix + g_tab).Append("ec = HDF_ERR_INVALID_PARAM;\n");
+    sb.Append(prefix + g_tab).AppendFormat("%s = HDF_ERR_INVALID_PARAM;\n", ecName.string());
     sb.Append(prefix + g_tab).AppendFormat("goto %s;\n", gotoLabel.string());
     sb.Append(prefix).Append("}\n");
 }
 
 void ASTUnionType::EmitCProxyReadVar(const String& parcelName, const String& name, bool isInnerType,
-    const String& gotoLabel, StringBuilder& sb, const String& prefix) const
+    const String& ecName, const String& gotoLabel, StringBuilder& sb, const String& prefix) const
 {
     if (Options::GetInstance().DoGenerateKernelCode()) {
         sb.Append(prefix).AppendFormat("%s *%s = NULL;\n", EmitCType().string(), name.string());
@@ -175,7 +175,7 @@ void ASTUnionType::EmitCProxyReadVar(const String& parcelName, const String& nam
             parcelName.string(), name.string());
         sb.Append(prefix + g_tab).AppendFormat(
             "HDF_LOGE(\"%%{public}s: read %s failed!\", __func__);\n", name.string());
-        sb.Append(prefix + g_tab).Append("ec = HDF_ERR_INVALID_PARAM;\n");
+        sb.Append(prefix + g_tab).AppendFormat("%s = HDF_ERR_INVALID_PARAM;\n", ecName.string());
         sb.Append(prefix + g_tab).AppendFormat("goto %s;\n", gotoLabel.string());
         sb.Append(prefix).Append("}\n\n");
         sb.Append(prefix).AppendFormat("if (%s == NULL || sizeof(%s) != len) {\n",
@@ -188,13 +188,13 @@ void ASTUnionType::EmitCProxyReadVar(const String& parcelName, const String& nam
 
     sb.Append(prefix + g_tab).AppendFormat(
         "HDF_LOGE(\"%%{public}s: read %s failed!\", __func__);\n", name.string());
-    sb.Append(prefix + g_tab).Append("ec = HDF_ERR_INVALID_PARAM;\n");
+    sb.Append(prefix + g_tab).AppendFormat("%s = HDF_ERR_INVALID_PARAM;\n", ecName.string());
     sb.Append(prefix + g_tab).AppendFormat("goto %s;\n", gotoLabel.string());
     sb.Append(prefix).Append("}\n");
 }
 
-void ASTUnionType::EmitCStubReadVar(const String& parcelName, const String& name, StringBuilder& sb,
-    const String& prefix) const
+void ASTUnionType::EmitCStubReadVar(const String& parcelName, const String& name, const String& ecName,
+    const String& gotoLabel, StringBuilder& sb, const String& prefix) const
 {
     if (Options::GetInstance().DoGenerateKernelCode()) {
         sb.Append(prefix).AppendFormat("%s *%s = NULL;\n", EmitCType().string(), name.string());
@@ -203,8 +203,8 @@ void ASTUnionType::EmitCStubReadVar(const String& parcelName, const String& name
             parcelName.string(), name.string());
         sb.Append(prefix + g_tab).AppendFormat(
             "HDF_LOGE(\"%%{public}s: read %s failed!\", __func__);\n", name.string());
-        sb.Append(prefix + g_tab).Append("ec = HDF_ERR_INVALID_PARAM;\n");
-        sb.Append(prefix + g_tab).Append("goto errors;\n");
+        sb.Append(prefix + g_tab).AppendFormat("%s = HDF_ERR_INVALID_PARAM;\n", ecName.string());
+        sb.Append(prefix + g_tab).AppendFormat("goto %s;\n", gotoLabel.string());
         sb.Append(prefix).Append("}\n\n");
         sb.Append(prefix).AppendFormat("if (%s == NULL || sizeof(%s) != len) {\n",
             name.string(), EmitCType().string());
@@ -216,8 +216,21 @@ void ASTUnionType::EmitCStubReadVar(const String& parcelName, const String& name
 
     sb.Append(prefix + g_tab).AppendFormat(
         "HDF_LOGE(\"%%{public}s: read %s failed!\", __func__);\n", name.string());
-    sb.Append(prefix + g_tab).Append("ec = HDF_ERR_INVALID_PARAM;\n");
-    sb.Append(prefix + g_tab).Append("goto errors;\n");
+    sb.Append(prefix + g_tab).AppendFormat("%s = HDF_ERR_INVALID_PARAM;\n", ecName.string());
+    sb.Append(prefix + g_tab).AppendFormat("goto %s;\n", gotoLabel.string());
+    sb.Append(prefix).Append("}\n");
+}
+
+void ASTUnionType::EmitCStubReadOutVar(const String& parcelName, const String& name, const String& ecName,
+    const String& gotoLabel, StringBuilder& sb, const String& prefix) const
+{
+    sb.Append(prefix).AppendFormat("%s = (%s*)OsalMemCalloc(sizeof(%s));\n", name.string(),
+        EmitCType(TypeMode::NO_MODE).string(), EmitCType(TypeMode::NO_MODE).string());
+    sb.Append(prefix).AppendFormat("if (%s == NULL) {\n", name.string());
+    sb.Append(prefix + g_tab).AppendFormat("HDF_LOGE(\"%%{public}s: malloc %s failed\", __func__);\n",
+        name.string());
+    sb.Append(prefix + g_tab).AppendFormat("%s = HDF_ERR_MALLOC_FAIL;\n", ecName.string());
+    sb.Append(prefix + g_tab).AppendFormat("goto %s;\n", gotoLabel.string());
     sb.Append(prefix).Append("}\n");
 }
 
@@ -265,8 +278,8 @@ void ASTUnionType::EmitCMarshalling(const String& name, StringBuilder& sb, const
     sb.Append(prefix).Append("}\n");
 }
 
-void ASTUnionType::EmitCUnMarshalling(const String& name, StringBuilder& sb, const String& prefix,
-    std::vector<String>& freeObjStatements) const
+void ASTUnionType::EmitCUnMarshalling(const String& name, const String& gotoLabel, StringBuilder& sb,
+    const String& prefix, std::vector<String>& freeObjStatements) const
 {
     if (Options::GetInstance().DoGenerateKernelCode()) {
         sb.Append(prefix).AppendFormat("%s *%s = NULL;\n", EmitCType().string(), name.string());
@@ -274,7 +287,7 @@ void ASTUnionType::EmitCUnMarshalling(const String& name, StringBuilder& sb, con
         sb.Append(prefix).AppendFormat("if (!HdfSbufReadBuffer(data, (const void **)&%s, &len)) {\n", name.string());
         sb.Append(prefix + g_tab).AppendFormat(
             "HDF_LOGE(\"%%{public}s: read %s failed!\", __func__);\n", name.string());
-        sb.Append(prefix + g_tab).Append("goto errors;\n");
+        sb.Append(prefix + g_tab).AppendFormat("goto %s;\n", gotoLabel.string());
         sb.Append(prefix).Append("}\n\n");
         sb.Append(prefix).AppendFormat("if (%s == NULL || sizeof(%s) != len) {\n",
             name.string(), EmitCType().string());
@@ -286,7 +299,7 @@ void ASTUnionType::EmitCUnMarshalling(const String& name, StringBuilder& sb, con
 
     sb.Append(prefix + g_tab).AppendFormat(
         "HDF_LOGE(\"%%{public}s: read %s failed!\", __func__);\n", name.string());
-    sb.Append(prefix + g_tab).Append("goto errors;\n");
+    sb.Append(prefix + g_tab).AppendFormat("goto %s;\n", gotoLabel.string());
     sb.Append(prefix).Append("}\n");
 }
 
diff --git a/tools/hdi-gen/ast/ast_union_type.h b/tools/hdi-gen/ast/ast_union_type.h
index 951e08ba..3102a2b0 100755
--- a/tools/hdi-gen/ast/ast_union_type.h
+++ b/tools/hdi-gen/ast/ast_union_type.h
@@ -92,14 +92,17 @@ public:
 
     String EmitJavaTypeDecl() const;
 
-    void EmitCWriteVar(const String& parcelName, const String& name, const String& gotoLabel,
-        StringBuilder& sb, const String& prefix) const override;
-
-    void EmitCProxyReadVar(const String& parcelName, const String& name, bool isInnerType,
+    void EmitCWriteVar(const String& parcelName, const String& name, const String& ecName,
         const String& gotoLabel, StringBuilder& sb, const String& prefix) const override;
 
-    void EmitCStubReadVar(const String& parcelName, const String& name, StringBuilder& sb,
-        const String& prefix) const override;
+    void EmitCProxyReadVar(const String& parcelName, const String& name, bool isInnerType, const String& ecName,
+        const String& gotoLabel, StringBuilder& sb, const String& prefix) const override;
+
+    void EmitCStubReadVar(const String& parcelName, const String& name, const String& ecName,
+        const String& gotoLabel, StringBuilder& sb, const String& prefix) const override;
+
+    void EmitCStubReadOutVar(const String& parcelName, const String& name, const String& ecName,
+    const String& gotoLabel, StringBuilder& sb, const String& prefix) const override;
 
     void EmitCppWriteVar(const String& parcelName, const String& name, StringBuilder& sb,
         const String& prefix, unsigned int innerLevel = 0) const override;
@@ -109,7 +112,7 @@ public:
 
     void EmitCMarshalling(const String& name, StringBuilder& sb, const String& prefix) const override;
 
-    void EmitCUnMarshalling(const String& name, StringBuilder& sb, const String& prefix,
+    void EmitCUnMarshalling(const String& name, const String& gotoLabel, StringBuilder& sb, const String& prefix,
         std::vector<String>& freeObjStatements) const override;
 
     void EmitCppMarshalling(const String& parcelName, const String& name, StringBuilder& sb,
diff --git a/tools/hdi-gen/ast/ast_ushort_type.cpp b/tools/hdi-gen/ast/ast_ushort_type.cpp
index 57e2c76e..eb6f7382 100755
--- a/tools/hdi-gen/ast/ast_ushort_type.cpp
+++ b/tools/hdi-gen/ast/ast_ushort_type.cpp
@@ -63,40 +63,40 @@ String ASTUshortType::EmitJavaType(TypeMode mode, bool isInnerType) const
     return "/";
 }
 
-void ASTUshortType::EmitCWriteVar(const String& parcelName, const String& name, const String& gotoLabel,
-    StringBuilder& sb, const String& prefix) const
+void ASTUshortType::EmitCWriteVar(const String& parcelName, const String& name, const String& ecName,
+    const String& gotoLabel, StringBuilder& sb, const String& prefix) const
 {
     sb.Append(prefix).AppendFormat("if (!HdfSbufWriteUint16(%s, %s)) {\n",
         parcelName.string(), name.string());
     sb.Append(prefix + g_tab).AppendFormat(
         "HDF_LOGE(\"%%{public}s: write %s failed!\", __func__);\n", name.string());
-    sb.Append(prefix + g_tab).Append("ec = HDF_ERR_INVALID_PARAM;\n");
+    sb.Append(prefix + g_tab).AppendFormat("%s = HDF_ERR_INVALID_PARAM;\n", ecName.string());
     sb.Append(prefix + g_tab).AppendFormat("goto %s;\n", gotoLabel.string());
     sb.Append(prefix).Append("}\n");
 }
 
 void ASTUshortType::EmitCProxyReadVar(const String& parcelName, const String& name, bool isInnerType,
+    const String& ecName, const String& gotoLabel, StringBuilder& sb, const String& prefix) const
+{
+    sb.Append(prefix).AppendFormat("if (!HdfSbufReadUint16(%s, %s)) {\n", parcelName.string(), name.string());
+    sb.Append(prefix + g_tab).AppendFormat(
+        "HDF_LOGE(\"%%{public}s: read %s failed!\", __func__);\n", name.string());
+    sb.Append(prefix + g_tab).AppendFormat("%s = HDF_ERR_INVALID_PARAM;\n", ecName.string());
+    sb.Append(prefix + g_tab).AppendFormat("goto %s;\n", gotoLabel.string());
+    sb.Append(prefix).Append("}\n");
+}
+
+void ASTUshortType::EmitCStubReadVar(const String& parcelName, const String& name, const String& ecName,
     const String& gotoLabel, StringBuilder& sb, const String& prefix) const
 {
     sb.Append(prefix).AppendFormat("if (!HdfSbufReadUint16(%s, %s)) {\n", parcelName.string(), name.string());
     sb.Append(prefix + g_tab).AppendFormat(
         "HDF_LOGE(\"%%{public}s: read %s failed!\", __func__);\n", name.string());
-    sb.Append(prefix + g_tab).Append("ec = HDF_ERR_INVALID_PARAM;\n");
+    sb.Append(prefix + g_tab).AppendFormat("%s = HDF_ERR_INVALID_PARAM;\n", ecName.string());
     sb.Append(prefix + g_tab).AppendFormat("goto %s;\n", gotoLabel.string());
     sb.Append(prefix).Append("}\n");
 }
 
-void ASTUshortType::EmitCStubReadVar(const String& parcelName, const String& name, StringBuilder& sb,
-    const String& prefix) const
-{
-    sb.Append(prefix).AppendFormat("if (!HdfSbufReadUint16(%s, %s)) {\n", parcelName.string(), name.string());
-    sb.Append(prefix + g_tab).AppendFormat(
-        "HDF_LOGE(\"%%{public}s: read %s failed!\", __func__);\n", name.string());
-    sb.Append(prefix + g_tab).Append("ec = HDF_ERR_INVALID_PARAM;\n");
-    sb.Append(prefix + g_tab).Append("goto errors;\n");
-    sb.Append(prefix).Append("}\n");
-}
-
 void ASTUshortType::EmitCppWriteVar(const String& parcelName, const String& name, StringBuilder& sb,
     const String& prefix, unsigned int innerLevel) const
 {
@@ -127,14 +127,14 @@ void ASTUshortType::EmitCMarshalling(const String& name, StringBuilder& sb, cons
     sb.Append(prefix).Append("}\n");
 }
 
-void ASTUshortType::EmitCUnMarshalling(const String& name, StringBuilder& sb, const String& prefix,
-    std::vector<String>& freeObjStatements) const
+void ASTUshortType::EmitCUnMarshalling(const String& name, const String& gotoLabel, StringBuilder& sb,
+    const String& prefix, std::vector<String>& freeObjStatements) const
 {
     sb.Append(prefix).AppendFormat("if (!HdfSbufReadUint16(data, &%s)) {\n", name.string());
     sb.Append(prefix + g_tab).AppendFormat(
         "HDF_LOGE(\"%%{public}s: read %s failed!\", __func__);\n", name.string());
     EmitFreeStatements(freeObjStatements, sb, prefix + g_tab);
-    sb.Append(prefix + g_tab).Append("goto errors;\n");
+    sb.Append(prefix + g_tab).AppendFormat("goto %s;\n", gotoLabel.string());
     sb.Append(prefix).Append("}\n");
 }
 
diff --git a/tools/hdi-gen/ast/ast_ushort_type.h b/tools/hdi-gen/ast/ast_ushort_type.h
index 3ba7204a..3c13bbae 100755
--- a/tools/hdi-gen/ast/ast_ushort_type.h
+++ b/tools/hdi-gen/ast/ast_ushort_type.h
@@ -27,14 +27,14 @@ public:
 
     String EmitJavaType(TypeMode mode, bool isInnerType = false) const override;
 
-    void EmitCWriteVar(const String& parcelName, const String& name, const String& gotoLabel,
-        StringBuilder& sb, const String& prefix) const override;
-
-    void EmitCProxyReadVar(const String& parcelName, const String& name, bool isInnerType,
+    void EmitCWriteVar(const String& parcelName, const String& name, const String& ecName,
         const String& gotoLabel, StringBuilder& sb, const String& prefix) const override;
 
-    void EmitCStubReadVar(const String& parcelName, const String& name, StringBuilder& sb,
-        const String& prefix) const override;
+    void EmitCProxyReadVar(const String& parcelName, const String& name, bool isInnerType, const String& ecName,
+        const String& gotoLabel, StringBuilder& sb, const String& prefix) const override;
+
+    void EmitCStubReadVar(const String& parcelName, const String& name, const String& ecName,
+        const String& gotoLabel, StringBuilder& sb, const String& prefix) const override;
 
     void EmitCppWriteVar(const String& parcelName, const String& name, StringBuilder& sb,
         const String& prefix, unsigned int innerLevel = 0) const override;
@@ -44,7 +44,7 @@ public:
 
     void EmitCMarshalling(const String& name, StringBuilder& sb, const String& prefix) const override;
 
-    void EmitCUnMarshalling(const String& name, StringBuilder& sb, const String& prefix,
+    void EmitCUnMarshalling(const String& name, const String& gotoLabel, StringBuilder& sb, const String& prefix,
         std::vector<String>& freeObjStatements) const override;
 
     void EmitCppMarshalling(const String& parcelName, const String& name, StringBuilder& sb,
diff --git a/tools/hdi-gen/codegen/c_client_proxy_code_emitter.cpp b/tools/hdi-gen/codegen/c_client_proxy_code_emitter.cpp
index ae87d1df..ae13bc7c 100755
--- a/tools/hdi-gen/codegen/c_client_proxy_code_emitter.cpp
+++ b/tools/hdi-gen/codegen/c_client_proxy_code_emitter.cpp
@@ -225,67 +225,44 @@ void CClientProxyCodeEmitter::EmitProxyMethodImpl(const AutoPtr<ASTMethod>& meth
 void CClientProxyCodeEmitter::EmitProxyMethodBody(const AutoPtr<ASTMethod>& method, StringBuilder& sb,
     const String& prefix)
 {
-    String dataName = "data_";
-    String replyName = "reply_";
     sb.Append(prefix).Append("{\n");
-    sb.Append(prefix + g_tab).Append("int32_t ec = HDF_FAILURE;\n");
+    sb.Append(prefix + g_tab).AppendFormat("int32_t %s = HDF_FAILURE;\n", errorCodeName_.string());
 
     // Local variable definitions must precede all execution statements.
-    if (isKernelCode_) {
-        for (size_t i = 0; i < method->GetParameterNumber(); i++) {
-            AutoPtr<ASTParameter> param = method->GetParameter(i);
-            AutoPtr<ASTType> type = param->GetType();
-            if (type->GetTypeKind() == TypeKind::TYPE_ARRAY ||
-                type->GetTypeKind() == TypeKind::TYPE_LIST) {
-                sb.Append(prefix + g_tab).Append("uint32_t i = 0;\n");
-                break;
-            }
-        }
-    }
+    EmitInitLoopVar(method, sb, prefix + g_tab);
 
     sb.Append("\n");
-    EmitCreateBuf(dataName, replyName, sb, prefix + g_tab);
+    EmitCreateBuf(dataParcelName_, replyParcelName_, sb, prefix + g_tab);
     sb.Append("\n");
 
-    String gotoName = GetGotLabel(method);
     for (size_t i = 0; i < method->GetParameterNumber(); i++) {
         AutoPtr<ASTParameter> param = method->GetParameter(i);
         if (param->GetAttribute() == ParamAttr::PARAM_IN) {
-            param->EmitCWriteVar(dataName, gotoName, sb, prefix + g_tab);
+            param->EmitCWriteVar(dataParcelName_, errorCodeName_, finishedLabelName_, sb, prefix + g_tab);
+            sb.Append("\n");
+        } else if (param->EmitCProxyWriteOutVar(dataParcelName_, errorCodeName_, finishedLabelName_, sb,
+            prefix + g_tab)) {
             sb.Append("\n");
         }
     }
 
-    if (!isKernelCode_) {
-        sb.Append(prefix + g_tab).AppendFormat("ec = %sCall(self, %s, %s, %s, %s);\n", proxyName_.string(),
-            EmitMethodCmdID(method).string(), dataName.string(), replyName.string(),
-            method->IsOneWay() ? "true" : "false");
-    } else {
-        sb.Append(prefix + g_tab).AppendFormat("ec = %sCall(self, %s, %s, %s);\n", proxyName_.string(),
-            EmitMethodCmdID(method).string(), dataName.string(), replyName.string());
-    }
-    sb.Append(prefix + g_tab).Append("if (ec != HDF_SUCCESS) {\n");
-    sb.Append(prefix + g_tab + g_tab).Append(
-        "HDF_LOGE(\"%{public}s: call failed! error code is %{public}d\", __func__, ec);\n");
-    sb.Append(prefix + g_tab + g_tab).AppendFormat("goto %s;\n", gotoName.string());
-    sb.Append(prefix + g_tab).Append("}\n");
+    EmitStubCallMethod(method, sb, prefix + g_tab);
     sb.Append("\n");
 
     if (!method->IsOneWay()) {
         for (size_t i = 0; i < method->GetParameterNumber(); i++) {
             AutoPtr<ASTParameter> param = method->GetParameter(i);
             if (param->GetAttribute() == ParamAttr::PARAM_OUT) {
-                EmitReadProxyMethodParameter(param, replyName, gotoName, sb, prefix + g_tab);
+                EmitReadProxyMethodParameter(param, replyParcelName_, finishedLabelName_, sb, prefix + g_tab);
                 sb.Append("\n");
             }
         }
     }
 
-    EmitErrorHandle(method, "errors", true, sb, prefix);
-    sb.Append(prefix).Append("finished:\n");
-    EmitReleaseBuf(dataName, replyName, sb, prefix + g_tab);
+    sb.Append(prefix).AppendFormat("%s:\n", finishedLabelName_);
+    EmitReleaseBuf(dataParcelName_, replyParcelName_, sb, prefix + g_tab);
 
-    sb.Append(prefix + g_tab).Append("return ec;\n");
+    sb.Append(prefix + g_tab).AppendFormat("return %s;\n", errorCodeName_.string());
     sb.Append("}\n");
 }
 
@@ -293,18 +270,18 @@ void CClientProxyCodeEmitter::EmitCreateBuf(const String& dataBufName, const Str
     StringBuilder& sb, const String& prefix)
 {
     if (isKernelCode_) {
-        sb.Append(prefix).AppendFormat("struct HdfSBuf *%s = HdfSBufObtainDefaultSize();\n", dataBufName.string());
-        sb.Append(prefix).AppendFormat("struct HdfSBuf *%s = HdfSBufObtainDefaultSize();\n", replyBufName.string());
+        sb.Append(prefix).AppendFormat("struct HdfSBuf *%s = HdfSbufObtainDefaultSize();\n", dataBufName.string());
+        sb.Append(prefix).AppendFormat("struct HdfSBuf *%s = HdfSbufObtainDefaultSize();\n", replyBufName.string());
     } else {
-        sb.Append(prefix).AppendFormat("struct HdfSBuf *%s = HdfSBufTypedObtain(SBUF_IPC);\n", dataBufName.string());
-        sb.Append(prefix).AppendFormat("struct HdfSBuf *%s = HdfSBufTypedObtain(SBUF_IPC);\n", replyBufName.string());
+        sb.Append(prefix).AppendFormat("struct HdfSBuf *%s = HdfSbufTypedObtain(SBUF_IPC);\n", dataBufName.string());
+        sb.Append(prefix).AppendFormat("struct HdfSBuf *%s = HdfSbufTypedObtain(SBUF_IPC);\n", replyBufName.string());
     }
 
     sb.Append("\n");
     sb.Append(prefix).AppendFormat("if (%s == NULL || %s == NULL) {\n", dataBufName.string(), replyBufName.string());
     sb.Append(prefix + g_tab).Append("HDF_LOGE(\"%{public}s: HdfSubf malloc failed!\", __func__);\n");
-    sb.Append(prefix + g_tab).Append("ec = HDF_ERR_MALLOC_FAIL;\n");
-    sb.Append(prefix + g_tab).Append("goto finished;\n");
+    sb.Append(prefix + g_tab).AppendFormat("%s = HDF_ERR_MALLOC_FAIL;\n", errorCodeName_.string());
+    sb.Append(prefix + g_tab).AppendFormat("goto %s;\n", finishedLabelName_);
     sb.Append(prefix).Append("}\n");
 }
 
@@ -312,10 +289,10 @@ void CClientProxyCodeEmitter::EmitReleaseBuf(const String& dataBufName, const St
     const String& prefix)
 {
     sb.Append(prefix).AppendFormat("if (%s != NULL) {\n", dataBufName.string());
-    sb.Append(prefix + g_tab).AppendFormat("HdfSBufRecycle(%s);\n", dataBufName.string());
+    sb.Append(prefix + g_tab).AppendFormat("HdfSbufRecycle(%s);\n", dataBufName.string());
     sb.Append(prefix).Append("}\n");
     sb.Append(prefix).AppendFormat("if (%s != NULL) {\n", replyBufName.string());
-    sb.Append(prefix + g_tab).AppendFormat("HdfSBufRecycle(%s);\n", replyBufName.string());
+    sb.Append(prefix + g_tab).AppendFormat("HdfSbufRecycle(%s);\n", replyBufName.string());
     sb.Append(prefix).Append("}\n");
 }
 
@@ -325,69 +302,43 @@ void CClientProxyCodeEmitter::EmitReadProxyMethodParameter(const AutoPtr<ASTPara
     AutoPtr<ASTType> type = param->GetType();
     if (type->GetTypeKind() == TypeKind::TYPE_STRING) {
         String cloneName = String::Format("%sCopy", param->GetName().string());
-        type->EmitCProxyReadVar(parcelName, cloneName, false, gotoLabel, sb, prefix);
-        String leftVar = String::Format("*%s", param->GetName().string());
-        if (isKernelCode_) {
-            sb.Append("\n");
-            sb.Append(prefix).AppendFormat("%s = (char*)OsalMemCalloc(strlen(%s) + 1);\n",
-                leftVar.string(), cloneName.string());
-            sb.Append(prefix).AppendFormat("if (%s == NULL) {\n", leftVar.string());
-            sb.Append(prefix + g_tab).Append("ec = HDF_ERR_MALLOC_FAIL;\n");
-            sb.Append(prefix + g_tab).AppendFormat("goto %s;\n", gotoLabel.string());
-            sb.Append(prefix).Append("}\n\n");
-            sb.Append(prefix).AppendFormat("if (strcpy_s(%s, (strlen(%s) + 1), %s) != HDF_SUCCESS) {\n",
-                leftVar.string(), cloneName.string(), cloneName.string());
-            sb.Append(prefix + g_tab).AppendFormat("HDF_LOGE(\"%%{public}s: read %s failed!\", __func__);\n",
-                leftVar.string());
-            sb.Append(prefix + g_tab).Append("ec = HDF_ERR_INVALID_PARAM;\n");
-            sb.Append(prefix + g_tab).AppendFormat("goto %s;\n", gotoLabel.string());
-            sb.Append(prefix).Append("}\n");
-        } else {
-            sb.Append(prefix).AppendFormat("%s = strdup(%s);\n", leftVar.string(), cloneName.string());
-        }
-    } else if (type->GetTypeKind() == TypeKind::TYPE_STRUCT) {
-        String name = String::Format("*%s", param->GetName().string());
-        sb.Append(prefix).AppendFormat("%s = (%s*)OsalMemAlloc(sizeof(%s));\n",
-            name.string(), type->EmitCType().string(), type->EmitCType().string());
-        sb.Append(prefix).AppendFormat("if (%s == NULL) {\n", name.string());
-        sb.Append(prefix + g_tab).Append("ec = HDF_ERR_MALLOC_FAIL;\n");
+        type->EmitCProxyReadVar(parcelName, cloneName, false, errorCodeName_, gotoLabel, sb, prefix);
+        sb.Append(prefix).AppendFormat("if (strcpy_s(%s, %sLen, %s) != EOK) {\n",
+            param->GetName().string(), param->GetName().string(), cloneName.string());
+        sb.Append(prefix + g_tab).AppendFormat("HDF_LOGE(\"%%{public}s: read %s failed!\", __func__);\n",
+            param->GetName().string());
+        sb.Append(prefix + g_tab).AppendFormat("%s = HDF_ERR_INVALID_PARAM;\n", errorCodeName_.string());
         sb.Append(prefix + g_tab).AppendFormat("goto %s;\n", gotoLabel.string());
         sb.Append(prefix).Append("}\n");
-        type->EmitCProxyReadVar(parcelName, name, false, gotoLabel, sb, prefix);
+    } else if (type->GetTypeKind() == TypeKind::TYPE_STRUCT) {
+        type->EmitCProxyReadVar(parcelName, param->GetName().string(), false, errorCodeName_, gotoLabel, sb, prefix);
     } else if (type->GetTypeKind() == TypeKind::TYPE_UNION) {
         String cpName = String::Format("%sCp", param->GetName().string());
-        type->EmitCProxyReadVar(parcelName, cpName, false, gotoLabel, sb, prefix);
-        sb.Append(prefix).AppendFormat("*%s = (%s*)OsalMemAlloc(sizeof(%s));\n",
-            param->GetName().string(), type->EmitCType().string(), type->EmitCType().string());
-        sb.Append(prefix).AppendFormat("if (*%s == NULL) {\n", param->GetName().string());
-        sb.Append(prefix + g_tab).Append("ec = HDF_ERR_MALLOC_FAIL;\n");
-        sb.Append(prefix + g_tab).AppendFormat("goto %s;\n", gotoLabel.string());
-        sb.Append(prefix).Append("}\n");
-        sb.Append(prefix).AppendFormat("(void)memcpy_s(*%s, sizeof(%s), %s, sizeof(%s));\n",
+        type->EmitCProxyReadVar(parcelName, cpName, false, errorCodeName_, gotoLabel, sb, prefix);
+        sb.Append(prefix).AppendFormat("(void)memcpy_s(%s, sizeof(%s), %s, sizeof(%s));\n",
             param->GetName().string(), type->EmitCType().string(), cpName.string(), type->EmitCType().string());
     } else {
-        type->EmitCProxyReadVar(parcelName, param->GetName(), false, gotoLabel, sb, prefix);
+        type->EmitCProxyReadVar(parcelName, param->GetName(), false, errorCodeName_, gotoLabel, sb, prefix);
     }
 }
 
-String CClientProxyCodeEmitter::GetGotLabel(const AutoPtr<ASTMethod>& method)
+void CClientProxyCodeEmitter::EmitStubCallMethod(const AutoPtr<ASTMethod>& method, StringBuilder& sb,
+    const String& prefix)
 {
-    String labelName = "finished";
-    for (size_t i = 0; i < method->GetParameterNumber(); i++) {
-        AutoPtr<ASTParameter> param = method->GetParameter(i);
-        AutoPtr<ASTType> paramType = param->GetType();
-        if (param->GetAttribute() == ParamAttr::PARAM_OUT &&
-            (paramType->GetTypeKind() == TypeKind::TYPE_STRING
-            || paramType->GetTypeKind() == TypeKind::TYPE_ARRAY
-            || paramType->GetTypeKind() == TypeKind::TYPE_LIST
-            || paramType->GetTypeKind() == TypeKind::TYPE_STRUCT
-            || paramType->GetTypeKind() == TypeKind::TYPE_UNION)) {
-            labelName = "errors";
-            break;
-        }
+    if (!isKernelCode_) {
+        sb.Append(prefix).AppendFormat("%s = %sCall(self, %s, %s, %s, %s);\n", errorCodeName_.string(),
+            proxyName_.string(), EmitMethodCmdID(method).string(), dataParcelName_.string(),
+            replyParcelName_.string(), method->IsOneWay() ? "true" : "false");
+    } else {
+        sb.Append(prefix).AppendFormat("%s = %sCall(self, %s, %s, %s);\n", errorCodeName_.string(),
+            proxyName_.string(), EmitMethodCmdID(method).string(), dataParcelName_.string(),
+            replyParcelName_.string());
     }
-
-    return labelName;
+    sb.Append(prefix).AppendFormat("if (%s != HDF_SUCCESS) {\n", errorCodeName_.string());
+    sb.Append(prefix + g_tab).AppendFormat(
+        "HDF_LOGE(\"%%{public}s: call failed! error code is %%{public}d\", __func__, %s);\n", errorCodeName_.string());
+    sb.Append(prefix + g_tab).AppendFormat("goto %s;\n", finishedLabelName_);
+    sb.Append(prefix).Append("}\n");
 }
 
 void CClientProxyCodeEmitter::EmitProxyAsObjectMethodImpl(StringBuilder& sb)
@@ -471,9 +422,9 @@ void CClientProxyCodeEmitter::EmitProxyGetInstanceMethodImpl(StringBuilder& sb)
     sb.Append(g_tab).AppendFormat("%sProxyConstruct(%s);\n", infName_.string(), objName.string());
     sb.Append(g_tab).AppendFormat("uint32_t %s = 0;\n", SerMajorName.string());
     sb.Append(g_tab).AppendFormat("uint32_t %s = 0;\n", SerMinorName.string());
-    sb.Append(g_tab).AppendFormat("int32_t ec = %s->GetVersion(%s, &%s, &%s);\n", objName.string(), objName.string(),
-        SerMajorName.string(), SerMinorName.string());
-    sb.Append(g_tab).Append("if (ec != HDF_SUCCESS) {\n");
+    sb.Append(g_tab).AppendFormat("int32_t %s = %s->GetVersion(%s, &%s, &%s);\n",
+        errorCodeName_.string(), objName.string(), objName.string(), SerMajorName.string(), SerMinorName.string());
+    sb.Append(g_tab).AppendFormat("if (%s != HDF_SUCCESS) {\n", errorCodeName_.string());
     sb.Append(g_tab).Append(g_tab).Append("HDF_LOGE(\"%{public}s: get version failed!\", __func__);\n");
     sb.Append(g_tab).Append(g_tab).AppendFormat("%sRelease(%s);\n", infName_.string(), objName.string());
     sb.Append(g_tab).Append(g_tab).Append("return NULL;\n");
@@ -546,9 +497,9 @@ void CClientProxyCodeEmitter::EmitCbProxyGetMethodImpl(StringBuilder& sb)
     sb.Append(g_tab).AppendFormat("%sProxyConstruct(%s);\n", infName_.string(), objName.string());
     sb.Append(g_tab).AppendFormat("uint32_t %s = 0;\n", SerMajorName.string());
     sb.Append(g_tab).AppendFormat("uint32_t %s = 0;\n", SerMinorName.string());
-    sb.Append(g_tab).AppendFormat("int32_t ec = %s->GetVersion(%s, &%s, &%s);\n", objName.string(), objName.string(),
-        SerMajorName.string(), SerMinorName.string());
-    sb.Append(g_tab).Append("if (ec != HDF_SUCCESS) {\n");
+    sb.Append(g_tab).AppendFormat("int32_t %s = %s->GetVersion(%s, &%s, &%s);\n",
+        errorCodeName_.string(), objName.string(), objName.string(), SerMajorName.string(), SerMinorName.string());
+    sb.Append(g_tab).AppendFormat("if (%s != HDF_SUCCESS) {\n", errorCodeName_.string());
     sb.Append(g_tab).Append(g_tab).Append("HDF_LOGE(\"%{public}s: get version failed!\", __func__);\n");
     sb.Append(g_tab).Append(g_tab).AppendFormat("%sRelease(%s);\n", infName_.string(), objName.string());
     sb.Append(g_tab).Append(g_tab).Append("return NULL;\n");
diff --git a/tools/hdi-gen/codegen/c_client_proxy_code_emitter.h b/tools/hdi-gen/codegen/c_client_proxy_code_emitter.h
index c2bfe910..1467d869 100755
--- a/tools/hdi-gen/codegen/c_client_proxy_code_emitter.h
+++ b/tools/hdi-gen/codegen/c_client_proxy_code_emitter.h
@@ -48,8 +48,8 @@ private:
 
     void EmitReadProxyMethodParameter(const AutoPtr<ASTParameter>& param, const String& parcelName,
         const String& gotoLabel, StringBuilder& sb, const String& prefix);
-
-    String GetGotLabel(const AutoPtr<ASTMethod>& method);
+    
+    void EmitStubCallMethod(const AutoPtr<ASTMethod>& method, StringBuilder& sb, const String& prefix);
 
     void EmitProxyAsObjectMethodImpl(StringBuilder& sb);
 
diff --git a/tools/hdi-gen/codegen/c_code_emitter.cpp b/tools/hdi-gen/codegen/c_code_emitter.cpp
index ef704989..6d0b9b78 100755
--- a/tools/hdi-gen/codegen/c_code_emitter.cpp
+++ b/tools/hdi-gen/codegen/c_code_emitter.cpp
@@ -72,6 +72,21 @@ void CCodeEmitter::EmitInterfaceMethodParameter(const AutoPtr<ASTParameter>& par
     sb.Append(prefix).Append(parameter->EmitCParameter());
 }
 
+void CCodeEmitter::EmitInitLoopVar(const AutoPtr<ASTMethod>& method, StringBuilder& sb, const String& prefix)
+{
+    if (isKernelCode_) {
+        for (size_t i = 0; i < method->GetParameterNumber(); i++) {
+            AutoPtr<ASTParameter> param = method->GetParameter(i);
+            AutoPtr<ASTType> type = param->GetType();
+            if (type->GetTypeKind() == TypeKind::TYPE_ARRAY ||
+                type->GetTypeKind() == TypeKind::TYPE_LIST) {
+                sb.Append(prefix).Append("uint32_t i = 0;\n");
+                break;
+            }
+        }
+    }
+}
+
 void CCodeEmitter::EmitErrorHandle(const AutoPtr<ASTMethod>& method, const String& gotoLabel, bool isClient,
     StringBuilder& sb, const String& prefix)
 {
@@ -84,28 +99,6 @@ void CCodeEmitter::EmitErrorHandle(const AutoPtr<ASTMethod>& method, const Strin
         }
         return;
     }
-
-    bool errorLabel = false;
-    for (size_t i = 0; i < method->GetParameterNumber(); i++) {
-        AutoPtr<ASTParameter> param = method->GetParameter(i);
-        AutoPtr<ASTType> paramType = param->GetType();
-        if (param->GetAttribute() == ParamAttr::PARAM_OUT &&
-            (paramType->GetTypeKind() == TypeKind::TYPE_STRING
-            || paramType->GetTypeKind() == TypeKind::TYPE_ARRAY
-            || paramType->GetTypeKind() == TypeKind::TYPE_LIST
-            || paramType->GetTypeKind() == TypeKind::TYPE_STRUCT
-            || paramType->GetTypeKind() == TypeKind::TYPE_UNION)) {
-            if (!errorLabel) {
-                sb.Append(prefix + g_tab).Append("goto finished;\n");
-                sb.Append("\n");
-                sb.Append(prefix).AppendFormat("%s:\n", gotoLabel.string());
-                errorLabel = true;
-            }
-
-            paramType->EmitMemoryRecycle(param->GetName(), isClient, true, sb, prefix + g_tab);
-            sb.Append("\n");
-        }
-    }
 }
 
 void CCodeEmitter::EmitLicense(StringBuilder& sb)
diff --git a/tools/hdi-gen/codegen/c_code_emitter.h b/tools/hdi-gen/codegen/c_code_emitter.h
index 9e0abf87..bf415018 100755
--- a/tools/hdi-gen/codegen/c_code_emitter.h
+++ b/tools/hdi-gen/codegen/c_code_emitter.h
@@ -31,6 +31,8 @@ protected:
 
     void EmitInterfaceMethodParameter(const AutoPtr<ASTParameter>& parameter, StringBuilder& sb, const String& prefix);
 
+    void EmitInitLoopVar(const AutoPtr<ASTMethod>& method, StringBuilder& sb, const String& prefix);
+
     void EmitErrorHandle(const AutoPtr<ASTMethod>& method, const String& gotoLabel, bool isClient, StringBuilder& sb,
         const String& prefix);
 
@@ -58,6 +60,9 @@ protected:
     }
 
     String SpecificationParam(StringBuilder& sb, const String& prefix);
+
+    static constexpr const char *errorsLabelName_ = "ERRORS";
+    static constexpr const char *finishedLabelName_ = "FINISHED";
 };
 } // namespace HDI
 } // namespace OHOS
diff --git a/tools/hdi-gen/codegen/c_custom_types_code_emitter.cpp b/tools/hdi-gen/codegen/c_custom_types_code_emitter.cpp
index 75c77d9e..affcfdc6 100755
--- a/tools/hdi-gen/codegen/c_custom_types_code_emitter.cpp
+++ b/tools/hdi-gen/codegen/c_custom_types_code_emitter.cpp
@@ -280,7 +280,7 @@ void CCustomTypesCodeEmitter::EmitCustomTypeUnmarshallingImpl(StringBuilder& sb,
     }
 
     sb.Append(g_tab).AppendFormat("return true;\n");
-    sb.Append("errors:\n");
+    sb.AppendFormat("%s:\n", errorsLabelName_);
     EmitCustomTypeMemoryRecycle(type, objName, sb, g_tab);
 
     sb.Append(g_tab).Append("return false;\n");
@@ -294,38 +294,38 @@ void CCustomTypesCodeEmitter::EmitMemberUnmarshalling(const AutoPtr<ASTType>& ty
     switch (type->GetTypeKind()) {
         case TypeKind::TYPE_STRING: {
             String tmpName = String::Format("%sCp", memberName.string());
-            type->EmitCUnMarshalling(tmpName, sb, g_tab, freeObjStatements_);
+            type->EmitCUnMarshalling(tmpName, errorsLabelName_, sb, g_tab, freeObjStatements_);
 
             if (Options::GetInstance().DoGenerateKernelCode()) {
                 sb.Append(g_tab).AppendFormat("%s = (char*)OsalMemCalloc(strlen(%s) + 1);\n",
                     varName.string(), tmpName.string());
                 sb.Append(g_tab).AppendFormat("if (%s == NULL) {\n", varName.string());
-                sb.Append(g_tab).Append(g_tab).Append("goto errors;\n");
+                sb.Append(g_tab).Append(g_tab).AppendFormat("goto %s;\n", errorsLabelName_);
                 sb.Append(g_tab).Append("}\n");
 
                 sb.Append(g_tab).AppendFormat("if (strcpy_s(%s, (strlen(%s) + 1), %s) != HDF_SUCCESS) {\n",
                     varName.string(), tmpName.string(), tmpName.string());
-                sb.Append(g_tab).Append(g_tab).Append("goto errors;\n");
+                sb.Append(g_tab).Append(g_tab).AppendFormat("goto %s;\n", errorsLabelName_);
                 sb.Append(g_tab).Append("}\n");
             } else {
                 sb.Append(g_tab).AppendFormat("%s = strdup(%s);\n", varName.string(), tmpName.string());
             }
 
             sb.Append(g_tab).AppendFormat("if (%s == NULL) {\n", varName.string());
-            sb.Append(g_tab).Append(g_tab).Append("goto errors;\n");
+            sb.Append(g_tab).Append(g_tab).AppendFormat("goto %s;\n", errorsLabelName_);
             sb.Append(g_tab).Append("}\n");
             sb.Append("\n");
             break;
         }
         case TypeKind::TYPE_STRUCT: {
             String paramName = String::Format("&%s", varName.string());
-            type->EmitCUnMarshalling(paramName, sb, g_tab, freeObjStatements_);
+            type->EmitCUnMarshalling(paramName, errorsLabelName_, sb, g_tab, freeObjStatements_);
             sb.Append("\n");
             break;
         }
         case TypeKind::TYPE_UNION: {
             String tmpName = String::Format("%sCp", memberName.string());
-            type->EmitCUnMarshalling(tmpName, sb, g_tab, freeObjStatements_);
+            type->EmitCUnMarshalling(tmpName, errorsLabelName_, sb, g_tab, freeObjStatements_);
             sb.Append(g_tab).AppendFormat("(void)memcpy_s(&%s, sizeof(%s), %s, sizeof(%s));\n",
                 varName.string(), type->EmitCType().string(),
                 tmpName.string(), type->EmitCType().string());
@@ -339,7 +339,7 @@ void CCustomTypesCodeEmitter::EmitMemberUnmarshalling(const AutoPtr<ASTType>& ty
             break;
         }
         default: {
-            type->EmitCUnMarshalling(varName, sb, g_tab, freeObjStatements_);
+            type->EmitCUnMarshalling(varName, errorsLabelName_, sb, g_tab, freeObjStatements_);
             sb.Append("\n");
         }
     }
@@ -360,7 +360,7 @@ void CCustomTypesCodeEmitter::EmitArrayMemberUnmarshalling(const AutoPtr<ASTType
 
     sb.Append(prefix).AppendFormat("%s* %s = NULL;\n", elementType->EmitCType().string(), tmpName.string());
     sb.Append(prefix).AppendFormat("uint32_t %sLen = 0;\n", tmpName.string());
-    type->EmitCUnMarshalling(tmpName, sb, prefix, freeObjStatements_);
+    type->EmitCUnMarshalling(tmpName, errorsLabelName_, sb, prefix, freeObjStatements_);
     sb.Append(prefix).AppendFormat("%s = %s;\n", varName.string(), tmpName.string());
     sb.Append(prefix).AppendFormat("%sLen = %sLen;\n", varName.string(), tmpName.string());
 }
diff --git a/tools/hdi-gen/codegen/c_service_stub_code_emitter.cpp b/tools/hdi-gen/codegen/c_service_stub_code_emitter.cpp
index 986f7f38..b2f2d285 100755
--- a/tools/hdi-gen/codegen/c_service_stub_code_emitter.cpp
+++ b/tools/hdi-gen/codegen/c_service_stub_code_emitter.cpp
@@ -193,35 +193,24 @@ void CServiceStubCodeEmitter::EmitServiceStubMethodImpls(StringBuilder& sb, cons
     }
 
     EmitStubGetVerMethodImpl(interface_->GetVersionMethod(), sb, prefix);
-    sb.Append("\n");
-    EmitStubAsObjectMethodImpl(sb, prefix);
+    if (!isKernelCode_) {
+        sb.Append("\n");
+        EmitStubAsObjectMethodImpl(sb, prefix);
+    }
 }
 
 void CServiceStubCodeEmitter::EmitServiceStubMethodImpl(const AutoPtr<ASTMethod>& method, StringBuilder& sb,
     const String& prefix)
 {
-    String dataName = "data_";
-    String replyName = "reply_";
     sb.Append(prefix).AppendFormat(
         "static int32_t SerStub%s(struct %s *serviceImpl, struct HdfSBuf *%s, struct HdfSBuf *%s)\n",
-        method->GetName().string(), interfaceName_.string(), dataName.string(), replyName.string());
+        method->GetName().string(), interfaceName_.string(), dataParcelName_.string(), replyParcelName_.string());
     sb.Append(prefix).Append("{\n");
-    sb.Append(prefix + g_tab).Append("int32_t ec = HDF_FAILURE;\n");
+    sb.Append(prefix + g_tab).AppendFormat("int32_t %s = HDF_FAILURE;\n", errorCodeName_.string());
 
     // Local variable definitions must precede all execution statements.
-    if (isKernelCode_) {
-        for (size_t i = 0; i < method->GetParameterNumber(); i++) {
-            AutoPtr<ASTParameter> param = method->GetParameter(i);
-            AutoPtr<ASTType> type = param->GetType();
-            if (type->GetTypeKind() == TypeKind::TYPE_ARRAY ||
-                type->GetTypeKind() == TypeKind::TYPE_LIST) {
-                sb.Append(prefix + g_tab).Append("uint32_t i = 0;\n");
-                break;
-            }
-        }
-    }
+    EmitInitLoopVar(method, sb, prefix + g_tab);
 
-    String gotoName = "errors";
     if (method->GetParameterNumber() > 0) {
         for (size_t i = 0; i < method->GetParameterNumber(); i++) {
             AutoPtr<ASTParameter> param = method->GetParameter(i);
@@ -232,25 +221,28 @@ void CServiceStubCodeEmitter::EmitServiceStubMethodImpl(const AutoPtr<ASTMethod>
         for (int i = 0; i < method->GetParameterNumber(); i++) {
             AutoPtr<ASTParameter> param = method->GetParameter(i);
             if (param->GetAttribute() == ParamAttr::PARAM_IN) {
-                EmitReadStubMethodParameter(param, dataName, sb, prefix + g_tab);
+                EmitReadStubMethodParameter(param, dataParcelName_, finishedLabelName_, sb, prefix + g_tab);
+                sb.Append("\n");
+            } else if (param->EmitCStubReadOutVar(dataParcelName_, errorCodeName_, finishedLabelName_, sb,
+                prefix + g_tab)) {
                 sb.Append("\n");
             }
         }
     }
 
-    EmitStubCallMethod(method, gotoName, sb, prefix + g_tab);
+    EmitStubCallMethod(method, finishedLabelName_, sb, prefix + g_tab);
     sb.Append("\n");
 
     for (int i = 0; i < method->GetParameterNumber(); i++) {
         AutoPtr<ASTParameter> param = method->GetParameter(i);
         if (param->GetAttribute() == ParamAttr::PARAM_OUT) {
-            param->EmitCWriteVar(replyName, gotoName, sb, prefix + g_tab);
+            param->EmitCWriteVar(replyParcelName_, errorCodeName_, finishedLabelName_, sb, prefix + g_tab);
             sb.Append("\n");
         }
     }
 
-    EmitErrorHandle(method, gotoName, false, sb, prefix);
-    sb.Append(prefix + g_tab).Append("return ec;\n");
+    EmitErrorHandle(method, finishedLabelName_, false, sb, prefix);
+    sb.Append(prefix + g_tab).AppendFormat("return %s;\n", errorCodeName_.string());
     sb.Append(prefix).Append("}\n");
 }
 
@@ -259,68 +251,77 @@ void CServiceStubCodeEmitter::EmitStubLocalVariable(const AutoPtr<ASTParameter>&
 {
     AutoPtr<ASTType> type = param->GetType();
     sb.Append(prefix).Append(param->EmitCLocalVar()).Append("\n");
-    if (type->GetTypeKind() == TypeKind::TYPE_ARRAY || type->GetTypeKind() == TypeKind::TYPE_LIST) {
+    if (type->GetTypeKind() == TypeKind::TYPE_ARRAY
+        || type->GetTypeKind() == TypeKind::TYPE_LIST
+        || (type->GetTypeKind() == TypeKind::TYPE_STRING && param->GetAttribute() == ParamAttr::PARAM_OUT)) {
         sb.Append(prefix).AppendFormat("uint32_t %sLen = 0;\n", param->GetName().string());
     }
 }
 
 void CServiceStubCodeEmitter::EmitReadStubMethodParameter(const AutoPtr<ASTParameter>& param,
-    const String& parcelName, StringBuilder& sb, const String& prefix)
+    const String& parcelName, const String& gotoLabel, StringBuilder& sb, const String& prefix)
 {
     AutoPtr<ASTType> type = param->GetType();
 
     if (type->GetTypeKind() == TypeKind::TYPE_STRING) {
-        EmitReadCStringStubMethodParameter(param, parcelName, sb, prefix, type);
+        EmitReadCStringStubMethodParameter(param, parcelName, gotoLabel, sb, prefix, type);
     } else if (type->GetTypeKind() == TypeKind::TYPE_INTERFACE) {
-        type->EmitCStubReadVar(parcelName, param->GetName(), sb, prefix);
+        type->EmitCStubReadVar(parcelName, param->GetName(), errorCodeName_, gotoLabel, sb, prefix);
     } else if (type->GetTypeKind() == TypeKind::TYPE_STRUCT) {
         sb.Append(prefix).AppendFormat("%s = (%s*)OsalMemAlloc(sizeof(%s));\n", param->GetName().string(),
             type->EmitCType(TypeMode::NO_MODE).string(), type->EmitCType(TypeMode::NO_MODE).string());
         sb.Append(prefix).AppendFormat("if (%s == NULL) {\n", param->GetName().string());
-        sb.Append(prefix + g_tab).Append("ec = HDF_ERR_MALLOC_FAIL;\n");
-        sb.Append(prefix + g_tab).Append("goto errors;\n");
+        sb.Append(prefix + g_tab).AppendFormat("HDF_LOGE(\"%%{public}s: malloc %s failed\", __func__);\n",
+            param->GetName().string());
+        sb.Append(prefix + g_tab).AppendFormat("%s = HDF_ERR_MALLOC_FAIL;\n", errorCodeName_.string());
+        sb.Append(prefix + g_tab).AppendFormat("goto %s;\n", finishedLabelName_);
         sb.Append(prefix).Append("}\n");
-        type->EmitCStubReadVar(parcelName, param->GetName(), sb, prefix);
+        type->EmitCStubReadVar(parcelName, param->GetName(), errorCodeName_, gotoLabel, sb, prefix);
     } else if (type->GetTypeKind() == TypeKind::TYPE_UNION) {
         String cpName = String::Format("%sCp", param->GetName().string());
-        type->EmitCStubReadVar(parcelName, cpName, sb, prefix);
+        type->EmitCStubReadVar(parcelName, cpName, errorCodeName_, gotoLabel, sb, prefix);
         sb.Append(prefix).AppendFormat("%s = (%s*)OsalMemAlloc(sizeof(%s));\n", param->GetName().string(),
             type->EmitCType(TypeMode::NO_MODE).string(), type->EmitCType(TypeMode::NO_MODE).string());
         sb.Append(prefix).AppendFormat("if (%s == NULL) {\n", param->GetName().string());
-        sb.Append(prefix + g_tab).Append("ec = HDF_ERR_MALLOC_FAIL;\n");
-        sb.Append(prefix + g_tab).Append("goto errors;\n");
+        sb.Append(prefix + g_tab).AppendFormat("HDF_LOGE(\"%%{public}s: malloc %s failed\", __func__);\n",
+            param->GetName().string());
+        sb.Append(prefix + g_tab).AppendFormat("%s = HDF_ERR_MALLOC_FAIL;\n", errorCodeName_.string());
+        sb.Append(prefix + g_tab).AppendFormat("goto %s;\n", finishedLabelName_);
         sb.Append(prefix).Append("}\n");
         sb.Append(prefix).AppendFormat("(void)memcpy_s(%s, sizeof(%s), %s, sizeof(%s));\n", param->GetName().string(),
             type->EmitCType(TypeMode::NO_MODE).string(), cpName.string(), type->EmitCType(TypeMode::NO_MODE).string());
     } else if (type->GetTypeKind() == TypeKind::TYPE_ARRAY || type->GetTypeKind() == TypeKind::TYPE_LIST) {
-        type->EmitCStubReadVar(parcelName, param->GetName(), sb, prefix);
+        type->EmitCStubReadVar(parcelName, param->GetName(), errorCodeName_, gotoLabel, sb, prefix);
     } else if (type->GetTypeKind() == TypeKind::TYPE_FILEDESCRIPTOR) {
-        type->EmitCStubReadVar(parcelName, param->GetName(), sb, prefix);
+        type->EmitCStubReadVar(parcelName, param->GetName(), errorCodeName_, gotoLabel, sb, prefix);
     } else {
         String name = String::Format("&%s", param->GetName().string());
-        type->EmitCStubReadVar(parcelName, name, sb, prefix);
+        type->EmitCStubReadVar(parcelName, name, errorCodeName_, gotoLabel, sb, prefix);
     }
 }
 
 void CServiceStubCodeEmitter::EmitReadCStringStubMethodParameter(const AutoPtr<ASTParameter>& param,
-    const String& parcelName, StringBuilder& sb, const String& prefix,  AutoPtr<ASTType>& type)
+    const String& parcelName, const String& gotoLabel, StringBuilder& sb, const String& prefix,
+    AutoPtr<ASTType>& type)
 {
     String cloneName = String::Format("%sCp", param->GetName().string());
-    type->EmitCStubReadVar(parcelName, cloneName, sb, prefix);
+    type->EmitCStubReadVar(parcelName, cloneName, errorCodeName_, gotoLabel, sb, prefix);
     if (isKernelCode_) {
         sb.Append("\n");
         sb.Append(prefix).AppendFormat("%s = (char*)OsalMemCalloc(strlen(%s) + 1);\n",
             param->GetName().string(), cloneName.string());
         sb.Append(prefix).AppendFormat("if (%s == NULL) {\n", param->GetName().string());
-        sb.Append(prefix + g_tab).Append("ec = HDF_ERR_MALLOC_FAIL;\n");
-        sb.Append(prefix + g_tab).Append("goto errors;\n");
+        sb.Append(prefix + g_tab).AppendFormat("%s = HDF_ERR_MALLOC_FAIL;\n", errorCodeName_.string());
+        sb.Append(prefix + g_tab).AppendFormat("HDF_LOGE(\"%%{public}s: malloc %s failed\", __func__);\n",
+            param->GetName().string());
+        sb.Append(prefix + g_tab).AppendFormat("goto %s;\n", gotoLabel.string());
         sb.Append(prefix).Append("}\n\n");
         sb.Append(prefix).AppendFormat("if (strcpy_s(%s, (strlen(%s) + 1), %s) != HDF_SUCCESS) {\n",
             param->GetName().string(), cloneName.string(), cloneName.string());
         sb.Append(prefix + g_tab).AppendFormat("HDF_LOGE(\"%%{public}s: read %s failed!\", __func__);\n",
             param->GetName().string());
-        sb.Append(prefix + g_tab).Append("ec = HDF_ERR_INVALID_PARAM;\n");
-        sb.Append(prefix + g_tab).Append("goto errors;\n");
+        sb.Append(prefix + g_tab).AppendFormat("%s = HDF_ERR_INVALID_PARAM;\n", errorCodeName_.string());
+        sb.Append(prefix + g_tab).AppendFormat("goto %s;\n", gotoLabel.string());
         sb.Append(prefix).Append("}\n");
     } else {
         sb.Append(prefix).AppendFormat("%s = strdup(%s);\n", param->GetName().string(), cloneName.string());
@@ -331,9 +332,11 @@ void CServiceStubCodeEmitter::EmitStubCallMethod(const AutoPtr<ASTMethod>& metho
     StringBuilder& sb, const String& prefix)
 {
     if (method->GetParameterNumber() == 0) {
-        sb.Append(prefix).AppendFormat("ec = serviceImpl->%s(serviceImpl);\n", method->GetName().string());
+        sb.Append(prefix).AppendFormat("%s = serviceImpl->%s(serviceImpl);\n", errorCodeName_.string(),
+            method->GetName().string());
     } else {
-        sb.Append(prefix).AppendFormat("ec = serviceImpl->%s(serviceImpl, ", method->GetName().string());
+        sb.Append(prefix).AppendFormat("%s = serviceImpl->%s(serviceImpl, ", errorCodeName_.string(),
+            method->GetName().string());
         for (size_t i = 0; i < method->GetParameterNumber(); i++) {
             AutoPtr<ASTParameter> param = method->GetParameter(i);
             EmitCallParameter(sb, param->GetType(), param->GetAttribute(), param->GetName());
@@ -344,7 +347,7 @@ void CServiceStubCodeEmitter::EmitStubCallMethod(const AutoPtr<ASTMethod>& metho
         sb.AppendFormat(");\n", method->GetName().string());
     }
 
-    sb.Append(prefix).Append("if (ec != HDF_SUCCESS) {\n");
+    sb.Append(prefix).AppendFormat("if (%s != HDF_SUCCESS) {\n", errorCodeName_.string());
     sb.Append(prefix + g_tab).AppendFormat(
         "HDF_LOGE(\"%%{public}s: call %s function failed!\", __func__);\n", method->GetName().string());
     sb.Append(prefix + g_tab).AppendFormat("goto %s;\n", gotoLabel.string());
@@ -355,8 +358,19 @@ void CServiceStubCodeEmitter::EmitCallParameter(StringBuilder& sb, const AutoPtr
     const String& name)
 {
     if (attribute == ParamAttr::PARAM_OUT) {
-        sb.AppendFormat("&%s", name.string());
-        if (type->GetTypeKind() == TypeKind::TYPE_ARRAY || type->GetTypeKind() == TypeKind::TYPE_LIST) {
+        if (type->GetTypeKind() == TypeKind::TYPE_STRING
+            || type->GetTypeKind() == TypeKind::TYPE_ARRAY
+            || type->GetTypeKind() == TypeKind::TYPE_LIST
+            || type->GetTypeKind() == TypeKind::TYPE_STRUCT
+            || type->GetTypeKind() == TypeKind::TYPE_UNION) {
+            sb.AppendFormat("%s", name.string());
+        } else {
+            sb.AppendFormat("&%s", name.string());
+        }
+
+        if (type->GetTypeKind() == TypeKind::TYPE_STRING) {
+            sb.AppendFormat(", %sLen", name.string());
+        } else if (type->GetTypeKind() == TypeKind::TYPE_ARRAY || type->GetTypeKind() == TypeKind::TYPE_LIST) {
             sb.AppendFormat(", &%sLen", name.string());
         }
     } else {
@@ -370,23 +384,20 @@ void CServiceStubCodeEmitter::EmitCallParameter(StringBuilder& sb, const AutoPtr
 void CServiceStubCodeEmitter::EmitStubGetVerMethodImpl(const AutoPtr<ASTMethod>& method, StringBuilder& sb,
     const String& prefix)
 {
-    String dataName = "data_";
-    String replyName = "reply_";
     sb.Append(prefix).AppendFormat(
         "static int32_t SerStub%s(struct %s *serviceImpl, struct HdfSBuf *%s, struct HdfSBuf *%s)\n",
-        method->GetName().string(), interfaceName_.string(), dataName.string(), replyName.string());
+        method->GetName().string(), interfaceName_.string(), dataParcelName_.string(), replyParcelName_.string());
     sb.Append(prefix).Append("{\n");
-    sb.Append(prefix + g_tab).Append("int32_t ec = HDF_FAILURE;\n");
+    sb.Append(prefix + g_tab).AppendFormat("int32_t %s = HDF_FAILURE;\n", errorCodeName_.string());
 
-    String gotoName = "errors";
     AutoPtr<ASTType> type = new ASTUintType();
-    type->EmitCWriteVar(replyName, majorVerName_, gotoName, sb, prefix + g_tab);
+    type->EmitCWriteVar(replyParcelName_, majorVerName_, errorCodeName_, finishedLabelName_, sb, prefix + g_tab);
     sb.Append("\n");
-    type->EmitCWriteVar(replyName, minorVerName_, gotoName, sb, prefix + g_tab);
+    type->EmitCWriteVar(replyParcelName_, minorVerName_, errorCodeName_, finishedLabelName_, sb, prefix + g_tab);
     sb.Append("\n");
 
-    sb.Append(gotoName).Append(":\n");
-    sb.Append(prefix + g_tab).Append("return ec;\n");
+    sb.Append(finishedLabelName_).Append(":\n");
+    sb.Append(prefix + g_tab).AppendFormat("return %s;\n", errorCodeName_.string());
     sb.Append(prefix).Append("}\n");
 }
 
@@ -429,7 +440,7 @@ void CServiceStubCodeEmitter::EmitStubOnRequestMethodImpl(StringBuilder& sb, con
     AutoPtr<ASTMethod> getVerMethod = interface_->GetVersionMethod();
     sb.Append(prefix + g_tab + g_tab).AppendFormat("case %s:\n", EmitMethodCmdID(getVerMethod).string());
     sb.Append(prefix + g_tab + g_tab + g_tab).AppendFormat("return SerStub%s(serviceImpl, data, reply);\n",
-              getVerMethod->GetName().string());
+        getVerMethod->GetName().string());
 
     sb.Append(prefix + g_tab + g_tab).Append("default: {\n");
     sb.Append(prefix + g_tab + g_tab + g_tab).AppendFormat(
@@ -460,7 +471,7 @@ void CServiceStubCodeEmitter::EmitServiceStubOnRequestMethodImpl(StringBuilder&
     AutoPtr<ASTMethod> getVerMethod = interface_->GetVersionMethod();
     sb.Append(prefix + g_tab + g_tab).AppendFormat("case %s:\n", EmitMethodCmdID(getVerMethod).string());
     sb.Append(prefix + g_tab + g_tab + g_tab).AppendFormat("return SerStub%s(serviceImpl, data, reply);\n",
-              getVerMethod->GetName().string());
+        getVerMethod->GetName().string());
 
     sb.Append(prefix + g_tab + g_tab).Append("default: {\n");
     sb.Append(prefix + g_tab + g_tab + g_tab).AppendFormat(
@@ -514,7 +525,6 @@ void CServiceStubCodeEmitter::EmitKernelStubGetMethodImpl(StringBuilder& sb)
         interfaceName_.string(), objName.string());
     sb.Append(g_tab).Append(g_tab).Append("return NULL;\n");
     sb.Append(g_tab).Append("}\n");
-    sb.Append(g_tab).AppendFormat("%sServiceConstruct(%s);\n", infName_.string(), objName.string());
     sb.Append(g_tab).AppendFormat("return %s;\n", objName.string());
     sb.Append("}\n");
 }
diff --git a/tools/hdi-gen/codegen/c_service_stub_code_emitter.h b/tools/hdi-gen/codegen/c_service_stub_code_emitter.h
index 885604c2..88b0e812 100755
--- a/tools/hdi-gen/codegen/c_service_stub_code_emitter.h
+++ b/tools/hdi-gen/codegen/c_service_stub_code_emitter.h
@@ -43,11 +43,11 @@ private:
 
     void EmitStubLocalVariable(const AutoPtr<ASTParameter>& param, StringBuilder& sb, const String& prefix);
 
-    void EmitReadStubMethodParameter(const AutoPtr<ASTParameter>& param, const String& parcelName, StringBuilder& sb,
-        const String& prefix);
+    void EmitReadStubMethodParameter(const AutoPtr<ASTParameter>& param, const String& parcelName,
+        const String& gotoLabel, StringBuilder& sb, const String& prefix);
 
     void EmitReadCStringStubMethodParameter(const AutoPtr<ASTParameter>& param, const String& parcelName,
-        StringBuilder& sb, const String& prefix, AutoPtr<ASTType>& type);
+        const String& gotoLabel, StringBuilder& sb, const String& prefix, AutoPtr<ASTType>& type);
 
     void EmitStubCallMethod(const AutoPtr<ASTMethod>& method, const String& gotoLabel, StringBuilder& sb,
         const String& prefix);
diff --git a/tools/hdi-gen/codegen/code_emitter.cpp b/tools/hdi-gen/codegen/code_emitter.cpp
index 63679309..8151b44f 100755
--- a/tools/hdi-gen/codegen/code_emitter.cpp
+++ b/tools/hdi-gen/codegen/code_emitter.cpp
@@ -52,6 +52,12 @@ bool CodeEmitter::Reset(const AutoPtr<AST>& ast, const String& targetDirectory,
     majorVerName_ = String::Format("%s_MAJOR_VERSION", interfaceName_.ToUnderLineUpper().string());
     minorVerName_ = String::Format("%s_MINOR_VERSION", interfaceName_.ToUnderLineUpper().string());
 
+    String prefix = String::Format("%c%s", tolower(infName_[0]), infName_.Substring(1).string());
+    dataParcelName_ = prefix + "Data";
+    replyParcelName_ = prefix + "Reply";
+    optionName_ = prefix + "Option";
+    errorCodeName_ = prefix + "Ret";
+
     if (!ResolveDirectory(targetDirectory)) {
         return false;
     }
@@ -74,6 +80,10 @@ void CodeEmitter::CleanData()
     stubFullName_ = "";
     implName_ = "";
     implFullName_ = "";
+    dataParcelName_ = "";
+    replyParcelName_ = "";
+    optionName_ = "";
+    errorCodeName_ = "";
 }
 
 String CodeEmitter::GetFilePath(const String& outDir)
diff --git a/tools/hdi-gen/codegen/code_emitter.h b/tools/hdi-gen/codegen/code_emitter.h
index 14d946d2..4dad7809 100755
--- a/tools/hdi-gen/codegen/code_emitter.h
+++ b/tools/hdi-gen/codegen/code_emitter.h
@@ -97,6 +97,11 @@ protected:
     String implFullName_;
     String majorVerName_;
     String minorVerName_;
+
+    String dataParcelName_;
+    String replyParcelName_;
+    String optionName_;
+    String errorCodeName_;
 };
 }
 }
diff --git a/tools/hdi-gen/codegen/cpp_client_proxy_code_emitter.cpp b/tools/hdi-gen/codegen/cpp_client_proxy_code_emitter.cpp
index 5f672ada..156a2009 100755
--- a/tools/hdi-gen/codegen/cpp_client_proxy_code_emitter.cpp
+++ b/tools/hdi-gen/codegen/cpp_client_proxy_code_emitter.cpp
@@ -245,9 +245,9 @@ void CppClientProxyCodeEmitter::EmitGetInstanceMethodImpl(StringBuilder& sb, con
 
     sb.Append(prefix + g_tab).AppendFormat("uint32_t %s = 0;\n", SerMajorName.string());
     sb.Append(prefix + g_tab).AppendFormat("uint32_t %s = 0;\n", SerMinorName.string());
-    sb.Append(prefix + g_tab).AppendFormat("int32_t ec = %s->GetVersion(%s, %s);\n",
+    sb.Append(prefix + g_tab).AppendFormat("int32_t %s = %s->GetVersion(%s, %s);\n", errorCodeName_.string(),
         objName.string(), SerMajorName.string(), SerMinorName.string());
-    sb.Append(prefix + g_tab).AppendFormat("if (ec != HDF_SUCCESS) {\n");
+    sb.Append(prefix + g_tab).AppendFormat("if (%s != HDF_SUCCESS) {\n", errorCodeName_.string());
     sb.Append(prefix + g_tab + g_tab).Append("HDF_LOGE(\"%{public}s:get version failed!\", __func__);\n");
     sb.Append(prefix + g_tab + g_tab).Append("return nullptr;\n");
     sb.Append(prefix + g_tab).Append("}\n\n");
@@ -301,32 +301,30 @@ void CppClientProxyCodeEmitter::EmitProxyMethodImpl(const AutoPtr<ASTMethod>& me
 void CppClientProxyCodeEmitter::EmitProxyMethodBody(const AutoPtr<ASTMethod>& method, StringBuilder& sb,
     const String& prefix)
 {
-    String dataName = "data_";
-    String replyName = "reply_";
-    String optionName = "option_";
     String option = method->IsOneWay() ? "MessageOption::TF_ASYNC" : "MessageOption::TF_SYNC";
     sb.Append(prefix).Append("{\n");
-    sb.Append(prefix + g_tab).AppendFormat("MessageParcel %s;\n", dataName.string());
-    sb.Append(prefix + g_tab).AppendFormat("MessageParcel %s;\n", replyName.string());
-    sb.Append(prefix + g_tab).AppendFormat("MessageOption %s(%s);\n", optionName.string(), option.string());
+    sb.Append(prefix + g_tab).AppendFormat("MessageParcel %s;\n", dataParcelName_.string());
+    sb.Append(prefix + g_tab).AppendFormat("MessageParcel %s;\n", replyParcelName_.string());
+    sb.Append(prefix + g_tab).AppendFormat("MessageOption %s(%s);\n", optionName_.string(), option.string());
     sb.Append("\n");
 
     if (method->GetParameterNumber() > 0) {
         for (size_t i = 0; i < method->GetParameterNumber(); i++) {
             AutoPtr<ASTParameter> param = method->GetParameter(i);
             if (param->GetAttribute() == ParamAttr::PARAM_IN) {
-                EmitWriteMethodParameter(param, dataName, sb, prefix + g_tab);
+                EmitWriteMethodParameter(param, dataParcelName_, sb, prefix + g_tab);
                 sb.Append("\n");
             }
         }
     }
 
-    sb.Append(prefix + g_tab).AppendFormat("int32_t ec = Remote()->SendRequest(%s, %s, %s, %s);\n",
-        EmitMethodCmdID(method).string(), dataName.string(), replyName.string(), optionName.string());
-    sb.Append(prefix + g_tab).Append("if (ec != HDF_SUCCESS) {\n");
+    sb.Append(prefix + g_tab).AppendFormat("int32_t %s = Remote()->SendRequest(%s, %s, %s, %s);\n",
+        errorCodeName_.string(), EmitMethodCmdID(method).string(), dataParcelName_.string(),
+        replyParcelName_.string(), optionName_.string());
+    sb.Append(prefix + g_tab).AppendFormat("if (%s != HDF_SUCCESS) {\n", errorCodeName_.string());
     sb.Append(prefix + g_tab + g_tab).AppendFormat(
-        "HDF_LOGE(\"%%{public}s failed, error code is %%{public}d\", __func__, ec);\n", method->GetName().string());
-    sb.Append(prefix + g_tab + g_tab).Append("return ec;\n");
+        "HDF_LOGE(\"%%{public}s failed, error code is %%{public}d\", __func__, %s);\n", errorCodeName_.string());
+    sb.Append(prefix + g_tab + g_tab).AppendFormat("return %s;\n", errorCodeName_.string());
     sb.Append(prefix + g_tab).Append("}\n");
 
     if (!method->IsOneWay()) {
@@ -334,7 +332,7 @@ void CppClientProxyCodeEmitter::EmitProxyMethodBody(const AutoPtr<ASTMethod>& me
         for (size_t i = 0; i < method->GetParameterNumber(); i++) {
             AutoPtr<ASTParameter> param = method->GetParameter(i);
             if (param->GetAttribute() == ParamAttr::PARAM_OUT) {
-                EmitReadMethodParameter(param, replyName, false, sb, prefix + g_tab);
+                EmitReadMethodParameter(param, replyParcelName_, false, sb, prefix + g_tab);
                 sb.Append("\n");
             }
         }
diff --git a/tools/hdi-gen/codegen/cpp_custom_types_code_emitter.cpp b/tools/hdi-gen/codegen/cpp_custom_types_code_emitter.cpp
index 27266667..53304e3b 100755
--- a/tools/hdi-gen/codegen/cpp_custom_types_code_emitter.cpp
+++ b/tools/hdi-gen/codegen/cpp_custom_types_code_emitter.cpp
@@ -268,8 +268,6 @@ void CppCustomTypesCodeEmitter::EmitBeginNamespace(StringBuilder& sb)
 {
     std::vector<String> cppNamespaceVec = EmitCppNameSpaceVec(ast_->GetPackageName());
     for (const auto& nspace : cppNamespaceVec) {
-        Logger::D("EmitBeginNamespace", "%s", nspace.string());
-
         sb.AppendFormat("namespace %s {\n", nspace.string());
     }
 }
@@ -282,4 +280,4 @@ void CppCustomTypesCodeEmitter::EmitEndNamespace(StringBuilder& sb)
     }
 }
 } // namespace HDI
-} // namespace OHOS
\ No newline at end of file
+} // namespace OHOS
diff --git a/tools/hdi-gen/codegen/cpp_service_stub_code_emitter.cpp b/tools/hdi-gen/codegen/cpp_service_stub_code_emitter.cpp
index ab222022..2b87f174 100755
--- a/tools/hdi-gen/codegen/cpp_service_stub_code_emitter.cpp
+++ b/tools/hdi-gen/codegen/cpp_service_stub_code_emitter.cpp
@@ -150,11 +150,9 @@ void CppServiceStubCodeEmitter::EmitStubMethodDecls(StringBuilder& sb, const Str
 void CppServiceStubCodeEmitter::EmitStubMethodDecl(const AutoPtr<ASTMethod>& method, StringBuilder& sb,
     const String& prefix)
 {
-    String dataName = "data_";
-    String replyName = "reply_";
-    String optionName = "option_";
     sb.Append(prefix).AppendFormat("int32_t %s%s(MessageParcel& %s, MessageParcel& %s, MessageOption& %s);\n",
-        stubName_.string(), method->GetName().string(), dataName.string(), replyName.string(), optionName.string());
+        stubName_.string(), method->GetName().string(), dataParcelName_.string(), replyParcelName_.string(),
+        optionName_.string());
 }
 
 void CppServiceStubCodeEmitter::EmitStubSourceFile()
@@ -280,19 +278,16 @@ void CppServiceStubCodeEmitter::EmitStubMethodImpls(StringBuilder& sb, const Str
 void CppServiceStubCodeEmitter::EmitStubMethodImpl(const AutoPtr<ASTMethod>& method, StringBuilder& sb,
     const String& prefix)
 {
-    String dataName = "data_";
-    String replyName = "reply_";
-    String optionName = "option_";
     sb.Append(prefix).AppendFormat(
         "int32_t %s::%s%s(MessageParcel& %s, MessageParcel& %s, MessageOption& %s)\n",
         stubName_.string(), stubName_.string(), method->GetName().string(),
-        dataName.string(), replyName.string(), optionName.string());
+        dataParcelName_.string(), replyParcelName_.string(), optionName_.string());
     sb.Append(prefix).Append("{\n");
 
     for (size_t i = 0; i < method->GetParameterNumber(); i++) {
         AutoPtr<ASTParameter> param = method->GetParameter(i);
         if (param->GetAttribute() == ParamAttr::PARAM_IN) {
-            EmitReadMethodParameter(param, dataName, true, sb, prefix + g_tab);
+            EmitReadMethodParameter(param, dataParcelName_, true, sb, prefix + g_tab);
             sb.Append("\n");
         } else {
             EmitLocalVariable(param, sb, prefix + g_tab);
@@ -307,7 +302,7 @@ void CppServiceStubCodeEmitter::EmitStubMethodImpl(const AutoPtr<ASTMethod>& met
         for (size_t i = 0; i < method->GetParameterNumber(); i++) {
             AutoPtr<ASTParameter> param = method->GetParameter(i);
             if (param->GetAttribute() == ParamAttr::PARAM_OUT) {
-                EmitWriteMethodParameter(param, replyName, sb, prefix + g_tab);
+                EmitWriteMethodParameter(param, replyParcelName_, sb, prefix + g_tab);
                 sb.Append("\n");
             }
         }
@@ -320,7 +315,7 @@ void CppServiceStubCodeEmitter::EmitStubMethodImpl(const AutoPtr<ASTMethod>& met
 void CppServiceStubCodeEmitter::EmitStubCallMethod(const AutoPtr<ASTMethod>& method, StringBuilder& sb,
     const String& prefix)
 {
-    sb.Append(prefix).AppendFormat("int32_t ec = %s(", method->GetName().string());
+    sb.Append(prefix).AppendFormat("int32_t %s = %s(", errorCodeName_.string(), method->GetName().string());
     for (size_t i = 0; i < method->GetParameterNumber(); i++) {
         AutoPtr<ASTParameter> param = method->GetParameter(i);
         sb.Append(param->GetName());
@@ -330,10 +325,10 @@ void CppServiceStubCodeEmitter::EmitStubCallMethod(const AutoPtr<ASTMethod>& met
     }
     sb.Append(");\n");
 
-    sb.Append(prefix).Append("if (ec != HDF_SUCCESS) {\n");
+    sb.Append(prefix).AppendFormat("if (%s != HDF_SUCCESS) {\n", errorCodeName_.string());
     sb.Append(prefix + g_tab).AppendFormat(
-        "HDF_LOGE(\"%%{public}s failed, error code is %%d\", __func__, ec);\n", method->GetName().string());
-    sb.Append(prefix + g_tab).Append("return ec;\n");
+        "HDF_LOGE(\"%%{public}s failed, error code is %%d\", __func__, %s);\n", errorCodeName_.string());
+    sb.Append(prefix + g_tab).AppendFormat("return %s;\n", errorCodeName_.string());
     sb.Append(prefix).Append("}\n");
 }
 } // namespace HDI