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Add support to emit debug info for c++ style namespaces.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90805 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Devang Patel 2009-12-07 21:41:32 +00:00
parent 80564f761a
commit 4063f6bcc7
4 changed files with 122 additions and 9 deletions
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24
include/llvm/Analysis/DebugInfo.h
View File

@ -99,6 +99,7 @@ namespace llvm {
bool isGlobalVariable() const;
bool isScope() const;
bool isCompileUnit() const;
bool isNameSpace() const;
bool isLexicalBlock() const;
bool isSubrange() const;
bool isEnumerator() const;
@ -218,7 +219,7 @@ namespace llvm {
virtual ~DIType() {}
DIDescriptor getContext() const { return getDescriptorField(1); }
StringRef getName() const { return getStringField(2); }
StringRef getName() const { return getStringField(2); }
DICompileUnit getCompileUnit() const{ return getFieldAs<DICompileUnit>(3); }
unsigned getLineNumber() const { return getUnsignedField(4); }
uint64_t getSizeInBits() const { return getUInt64Field(5); }
@ -470,6 +471,22 @@ namespace llvm {
StringRef getFilename() const { return getContext().getFilename(); }
};
/// DINameSpace - A wrapper for a C++ style name space.
class DINameSpace : public DIScope {
public:
explicit DINameSpace(MDNode *N = 0) : DIScope(N) {
if (DbgNode && !isNameSpace())
DbgNode = 0;
}
DIScope getContext() const { return getFieldAs<DIScope>(1); }
StringRef getName() const { return getStringField(2); }
StringRef getDirectory() const { return getContext().getDirectory(); }
StringRef getFilename() const { return getContext().getFilename(); }
DICompileUnit getCompileUnit() const { return getFieldAs<DICompileUnit>(3); }
unsigned getLineNumber() const { return getUnsignedField(4); }
};
/// DILocation - This object holds location information. This object
/// is not associated with any DWARF tag.
class DILocation : public DIDescriptor {
@ -624,6 +641,11 @@ namespace llvm {
/// with the specified parent context.
DILexicalBlock CreateLexicalBlock(DIDescriptor Context);
/// CreateNameSpace - This creates new descriptor for a namespace
/// with the specified parent context.
DINameSpace CreateNameSpace(DIDescriptor Context, StringRef Name,
DICompileUnit CU, unsigned LineNo);
/// CreateLocation - Creates a debug info location.
DILocation CreateLocation(unsigned LineNo, unsigned ColumnNo,
DIScope S, DILocation OrigLoc);

28
lib/Analysis/DebugInfo.cpp
View File

@ -227,6 +227,7 @@ bool DIDescriptor::isScope() const {
case dwarf::DW_TAG_compile_unit:
case dwarf::DW_TAG_lexical_block:
case dwarf::DW_TAG_subprogram:
case dwarf::DW_TAG_namespace:
return true;
default:
break;
@ -242,6 +243,14 @@ bool DIDescriptor::isCompileUnit() const {
return Tag == dwarf::DW_TAG_compile_unit;
}
/// isNameSpace - Return true if the specified tag is DW_TAG_namespace.
bool DIDescriptor::isNameSpace() const {
assert (!isNull() && "Invalid descriptor!");
unsigned Tag = getTag();
return Tag == dwarf::DW_TAG_namespace;
}
/// isLexicalBlock - Return true if the specified tag is DW_TAG_lexical_block.
bool DIDescriptor::isLexicalBlock() const {
assert (!isNull() && "Invalid descriptor!");
@ -438,6 +447,8 @@ StringRef DIScope::getFilename() const {
return DISubprogram(DbgNode).getFilename();
else if (isCompileUnit())
return DICompileUnit(DbgNode).getFilename();
else if (isNameSpace())
return DINameSpace(DbgNode).getFilename();
else
assert (0 && "Invalid DIScope!");
return StringRef();
@ -450,6 +461,8 @@ StringRef DIScope::getDirectory() const {
return DISubprogram(DbgNode).getDirectory();
else if (isCompileUnit())
return DICompileUnit(DbgNode).getDirectory();
else if (isNameSpace())
return DINameSpace(DbgNode).getDirectory();
else
assert (0 && "Invalid DIScope!");
return StringRef();
@ -996,6 +1009,21 @@ DILexicalBlock DIFactory::CreateLexicalBlock(DIDescriptor Context) {
return DILexicalBlock(MDNode::get(VMContext, &Elts[0], 2));
}
/// CreateNameSpace - This creates new descriptor for a namespace
/// with the specified parent context.
DINameSpace DIFactory::CreateNameSpace(DIDescriptor Context, StringRef Name,
DICompileUnit CompileUnit,
unsigned LineNo) {
Value *Elts[] = {
GetTagConstant(dwarf::DW_TAG_namespace),
Context.getNode(),
MDString::get(VMContext, Name),
CompileUnit.getNode(),
ConstantInt::get(Type::getInt32Ty(VMContext), LineNo)
};
return DINameSpace(MDNode::get(VMContext, &Elts[0], 5));
}
/// CreateLocation - Creates a debug info location.
DILocation DIFactory::CreateLocation(unsigned LineNo, unsigned ColumnNo,
DIScope S, DILocation OrigLoc) {

75
lib/CodeGen/AsmPrinter/DwarfDebug.cpp
View File

@ -446,6 +446,23 @@ void DwarfDebug::addSourceLine(DIE *Die, const DIType *Ty) {
addUInt(Die, dwarf::DW_AT_decl_line, 0, Line);
}
/// addSourceLine - Add location information to specified debug information
/// entry.
void DwarfDebug::addSourceLine(DIE *Die, const DINameSpace *NS) {
// If there is no compile unit specified, don't add a line #.
if (NS->getCompileUnit().isNull())
return;
unsigned Line = NS->getLineNumber();
StringRef FN = NS->getFilename();
StringRef Dir = NS->getDirectory();
unsigned FileID = GetOrCreateSourceID(Dir, FN);
assert(FileID && "Invalid file id");
addUInt(Die, dwarf::DW_AT_decl_file, 0, FileID);
addUInt(Die, dwarf::DW_AT_decl_line, 0, Line);
}
/* Byref variables, in Blocks, are declared by the programmer as
"SomeType VarName;", but the compiler creates a
__Block_byref_x_VarName struct, and gives the variable VarName
@ -771,9 +788,13 @@ void DwarfDebug::addType(CompileUnit *DW_Unit, DIE *Entity, DIType Ty) {
// Add debug information entry to entity and appropriate context.
DIE *Die = NULL;
DIDescriptor Context = Ty.getContext();
if (!Context.isNull())
Die = DW_Unit->getDIE(Context.getNode());
if (!Context.isNull()) {
if (Context.isNameSpace()) {
DINameSpace NS(Context.getNode());
Die = getOrCreateNameSpace(NS);
} else
Die = DW_Unit->getDIE(Context.getNode());
}
if (Die)
Die->addChild(Buffer);
else
@ -1643,6 +1664,29 @@ unsigned DwarfDebug::GetOrCreateSourceID(StringRef DirName, StringRef FileName)
return SrcId;
}
/// getOrCreateNameSpace - Create a DIE for DINameSpace.
DIE *DwarfDebug::getOrCreateNameSpace(DINameSpace &NS) {
DIE *NDie = ModuleCU->getDIE(NS.getNode());
if (NDie)
return NDie;
NDie = new DIE(dwarf::DW_TAG_namespace);
ModuleCU->insertDIE(NS.getNode(), NDie);
if (!NS.getName().empty())
addString(NDie, dwarf::DW_AT_name, dwarf::DW_FORM_string, NS.getName());
addSourceLine(NDie, &NS);
DIDescriptor NSContext = NS.getContext();
DIE *Context = NULL;
if (NSContext.isNameSpace()) {
DINameSpace NS2(NSContext.getNode());
Context = getOrCreateNameSpace(NS2);
}
else
Context = ModuleCU->getCUDie();
Context->addChild(NDie);
return NDie;
}
void DwarfDebug::constructCompileUnit(MDNode *N) {
DICompileUnit DIUnit(N);
StringRef FN = DIUnit.getFilename();
@ -1734,10 +1778,17 @@ void DwarfDebug::constructSubprogramDIE(MDNode *N) {
ModuleCU->insertDIE(N, SubprogramDie);
// Add to context owner.
if (SP.getContext().getNode() == SP.getCompileUnit().getNode())
DIDescriptor SPContext = SP.getContext();
if (SPContext.isCompileUnit()
&& SPContext.getNode() == SP.getCompileUnit().getNode()) {
if (TopLevelDIEs.insert(SubprogramDie))
TopLevelDIEsVector.push_back(SubprogramDie);
} else if (SPContext.isNameSpace()) {
DINameSpace NS(SPContext.getNode());
DIE *NDie = getOrCreateNameSpace(NS);
NDie->addChild(SubprogramDie);
}
// Expose as global.
ModuleCU->addGlobal(SP.getName(), SubprogramDie);
@ -1780,10 +1831,18 @@ void DwarfDebug::beginModule(Module *M, MachineModuleInfo *mmi) {
for (DebugInfoFinder::iterator I = DbgFinder.global_variable_begin(),
E = DbgFinder.global_variable_end(); I != E; ++I) {
DIGlobalVariable GV(*I);
if (GV.getContext().getNode() != GV.getCompileUnit().getNode())
ScopedGVs.push_back(*I);
else
DIDescriptor GVContext = GV.getContext();
if (GVContext.isCompileUnit()
&& GVContext.getNode() == GV.getCompileUnit().getNode())
constructGlobalVariableDIE(*I);
else if (GVContext.isNameSpace()) {
DIE *GVDie = createGlobalVariableDIE(ModuleCU, GV);
DINameSpace NS(GVContext.getNode());
DIE *NDie = getOrCreateNameSpace(NS);
NDie->addChild(GVDie);
}
else
ScopedGVs.push_back(*I);
}
// Create DIEs for each subprogram.

4
lib/CodeGen/AsmPrinter/DwarfDebug.h
View File

@ -289,6 +289,7 @@ class DwarfDebug : public Dwarf {
void addSourceLine(DIE *Die, const DIGlobal *G);
void addSourceLine(DIE *Die, const DISubprogram *SP);
void addSourceLine(DIE *Die, const DIType *Ty);
void addSourceLine(DIE *Die, const DINameSpace *NS);
/// addAddress - Add an address attribute to a die based on the location
/// provided.
@ -340,6 +341,9 @@ class DwarfDebug : public Dwarf {
/// constructEnumTypeDIE - Construct enum type DIE from DIEnumerator.
DIE *constructEnumTypeDIE(CompileUnit *DW_Unit, DIEnumerator *ETy);
/// getOrCreateNameSpace - Create a DIE for DINameSpace.
DIE *getOrCreateNameSpace(DINameSpace &NS);
/// createGlobalVariableDIE - Create new DIE using GV.
DIE *createGlobalVariableDIE(CompileUnit *DW_Unit,
const DIGlobalVariable &GV);