Path: Recognize COFF import library file magic.

Summary: Make identify_magic to recognize COFF import file.

Reviewers: Bigcheese

CC: llvm-commits

Differential Revision: http://llvm-reviews.chandlerc.com/D2165

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@194852 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/Support/FileSystem.h

@@ -238,6 +238,7 @@ struct file_magic {
     macho_dsym_companion,     ///< Mach-O dSYM companion file
     macho_universal_binary,   ///< Mach-O universal binary
     coff_object,              ///< COFF object file
+    coff_import_library,      ///< COFF import library
     pecoff_executable,        ///< PECOFF executable file
     windows_resource          ///< Windows compiled resource file (.rc)
   };

lib/ExecutionEngine/RuntimeDyld/RuntimeDyld.cpp

@@ -584,6 +584,7 @@ ObjectImage *RuntimeDyld::loadObject(ObjectBuffer *InputBuffer) {
     case sys::fs::file_magic::bitcode:
     case sys::fs::file_magic::archive:
     case sys::fs::file_magic::coff_object:
+    case sys::fs::file_magic::coff_import_library:
     case sys::fs::file_magic::pecoff_executable:
     case sys::fs::file_magic::macho_universal_binary:
     case sys::fs::file_magic::windows_resource:

lib/Object/Binary.cpp

@@ -91,6 +91,7 @@ error_code object::createBinary(MemoryBuffer *Source,
       return object_error::success;
     }
     case sys::fs::file_magic::coff_object:
+    case sys::fs::file_magic::coff_import_library:
     case sys::fs::file_magic::pecoff_executable: {
       OwningPtr<Binary> ret(
           ObjectFile::createCOFFObjectFile(scopedSource.take()));

lib/Object/ObjectFile.cpp

@@ -69,6 +69,7 @@ ObjectFile *ObjectFile::createObjectFile(MemoryBuffer *Object) {
   case sys::fs::file_magic::macho_dsym_companion:
     return createMachOObjectFile(Object);
   case sys::fs::file_magic::coff_object:
+  case sys::fs::file_magic::coff_import_library:
   case sys::fs::file_magic::pecoff_executable:
     return createCOFFObjectFile(Object);
   }

lib/Support/Path.cpp

@@ -848,6 +848,10 @@ error_code has_magic(const Twine &path, const Twine &magic, bool &result) {
     return file_magic::unknown;
   switch ((unsigned char)Magic[0]) {
     case 0x00: {
+      // COFF short import library file
+      if (Magic[1] == (char)0x00 && Magic[2] == (char)0xff &&
+          Magic[3] == (char)0xff)
+        return file_magic::coff_import_library;
       // Windows resource file
       const char Expected[] = { 0, 0, 0, 0, '\x20', 0, 0, 0, '\xff' };
       if (Magic.size() >= sizeof(Expected) &&

test/tools/llvm-readobj/file-headers.test

@@ -10,6 +10,8 @@ RUN: llvm-readobj -h %p/Inputs/trivial.obj.elf-x86-64 \
 RUN:   | FileCheck %s -check-prefix ELF64
 RUN: llvm-readobj -h %p/Inputs/magic.coff-unknown \
 RUN:   | FileCheck %s -check-prefix COFF-UNKNOWN
+RUN: llvm-readobj -h %p/Inputs/magic.coff-importlib \
+RUN:   | FileCheck %s -check-prefix COFF-IMPORTLIB
 
 COFF32:      File: {{(.*[/\\])?}}trivial.obj.coff-i386
 COFF32-NEXT: Format: COFF-i386
@@ -199,3 +201,18 @@ COFF-UNKNOWN-NEXT:   OptionalHeaderSize: 0
 COFF-UNKNOWN-NEXT:   Characteristics [ (0x0)
 COFF-UNKNOWN-NEXT:   ]
 COFF-UNKNOWN-NEXT: }
+
+COFF-IMPORTLIB:      Format: COFF-<unknown arch>
+COFF-IMPORTLIB-NEXT: Arch: unknown
+COFF-IMPORTLIB-NEXT: AddressSize: 32bit
+COFF-IMPORTLIB-NEXT: ImageFileHeader {
+COFF-IMPORTLIB-NEXT:   Machine: IMAGE_FILE_MACHINE_UNKNOWN (0x0)
+COFF-IMPORTLIB-NEXT:   SectionCount: 65535
+COFF-IMPORTLIB-NEXT:   TimeDateStamp: 1970-09-09 19:52:32 (0x14C0000)
+COFF-IMPORTLIB-NEXT:   PointerToSymbolTable: 0x528542EB
+COFF-IMPORTLIB-NEXT:   SymbolCount: 20
+COFF-IMPORTLIB-NEXT:   OptionalHeaderSize: 0
+COFF-IMPORTLIB-NEXT:   Characteristics [ (0x8)
+COFF-IMPORTLIB-NEXT:     IMAGE_FILE_LOCAL_SYMS_STRIPPED (0x8)
+COFF-IMPORTLIB-NEXT:   ]
+COFF-IMPORTLIB-NEXT: }

unittests/Support/Path.cpp

@@ -419,6 +419,7 @@ TEST_F(FileSystemTest, DirectoryIteration) {
 const char archive[] = "!<arch>\x0A";
 const char bitcode[] = "\xde\xc0\x17\x0b";
 const char coff_object[] = "\x00\x00......";
+const char coff_import_library[] = "\x00\x00\xff\xff....";
 const char elf_relocatable[] = { 0x7f, 'E', 'L', 'F', 1, 2, 1, 0, 0,
                                  0,    0,   0,   0,   0, 0, 0, 0, 1 };
 const char macho_universal_binary[] = "\xca\xfe\xba\xbe...\0x00";
@@ -447,6 +448,7 @@ TEST_F(FileSystemTest, Magic) {
     DEFINE(archive),
     DEFINE(bitcode),
     DEFINE(coff_object),
+    DEFINE(coff_import_library),
     DEFINE(elf_relocatable),
     DEFINE(macho_universal_binary),
     DEFINE(macho_object),