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Introduce two DWARF attribute extentions DW_AT_APPLE_optimized, DW_AT_APPLE_flags.

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DW_AT_APPLE_optimized flag is set when a compile_unit is optimized. The debugger takes advantage of this information some way.

DW_AT_APPLE_flags encodes command line options when certain env. variable is set. This is used by build engineers to track various gcc command lines used by by  a project, irrespective of whether the project used makefile, Xcode or something else.

llvm-gcc patch is next.

llvm-svn: 62888
This commit is contained in:
Devang Patel 2009-01-23 22:33:47 +00:00
parent 97b6f6a674
commit d980abaae2
5 changed files with 23 additions and 4 deletions
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6
include/llvm/Analysis/DebugInfo.h
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@ -109,6 +109,8 @@ namespace llvm {
std::string getFilename() const { return getStringField(3); }
std::string getDirectory() const { return getStringField(4); }
std::string getProducer() const { return getStringField(5); }
bool isOptimized() const { return getUnsignedField(6); }
std::string getFlags() const { return getStringField(7); }
/// Verify - Verify that a compile unit is well formed.
bool Verify() const;
@ -372,7 +374,9 @@ namespace llvm {
DICompileUnit CreateCompileUnit(unsigned LangID,
const std::string &Filename,
const std::string &Directory,
const std::string &Producer);
const std::string &Producer,
bool isOptimized = false,
const char *Flags = "");
/// CreateEnumerator - Create a single enumerator value.
DIEnumerator CreateEnumerator(const std::string &Name, uint64_t Val);

6
include/llvm/Support/Dwarf.h
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@ -221,7 +221,11 @@ enum dwarf_constants {
DW_AT_GNU_vector = 0x2107,
DW_AT_lo_user = 0x2000,
DW_AT_hi_user = 0x3fff,
// Apple extensions.
DW_AT_APPLE_optimized = 0x3fe1,
DW_AT_APPLE_flags = 0x3fe2,
// Attribute form encodings
DW_FORM_addr = 0x01,
DW_FORM_block2 = 0x03,

8
lib/Analysis/DebugInfo.cpp
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@ -440,14 +440,18 @@ DISubrange DIFactory::GetOrCreateSubrange(int64_t Lo, int64_t Hi) {
DICompileUnit DIFactory::CreateCompileUnit(unsigned LangID,
const std::string &Filename,
const std::string &Directory,
const std::string &Producer) {
const std::string &Producer,
bool isOptimized,
const char *Flags) {
Constant *Elts[] = {
GetTagConstant(dwarf::DW_TAG_compile_unit),
getCastToEmpty(GetOrCreateCompileUnitAnchor()),
ConstantInt::get(Type::Int32Ty, LangID),
GetStringConstant(Filename),
GetStringConstant(Directory),
GetStringConstant(Producer)
GetStringConstant(Producer),
ConstantInt::get(Type::Int1Ty, isOptimized),
GetStringConstant(Flags)
};
Constant *Init = ConstantStruct::get(Elts, sizeof(Elts)/sizeof(Elts[0]));

5
lib/CodeGen/AsmPrinter/DwarfWriter.cpp
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@ -2781,6 +2781,11 @@ private:
AddString(Die, DW_AT_name, DW_FORM_string, DIUnit.getFilename());
if (!DIUnit.getDirectory().empty())
AddString(Die, DW_AT_comp_dir, DW_FORM_string, DIUnit.getDirectory());
if (DIUnit.isOptimized())
AddUInt(Die, DW_AT_APPLE_optimized, DW_FORM_flag, 1);
const std::string &Flags = DIUnit.getFlags();
if (!Flags.empty())
AddString(Die, DW_AT_APPLE_flags, DW_FORM_string, Flags);
CompileUnit *Unit = new CompileUnit(ID, Die);
DW_CUs[DIUnit.getGV()] = Unit;

2
lib/Support/Dwarf.cpp
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@ -198,6 +198,8 @@ const char *AttributeString(unsigned Attribute) {
case DW_AT_GNU_vector: return "DW_AT_GNU_vector";
case DW_AT_lo_user: return "DW_AT_lo_user";
case DW_AT_hi_user: return "DW_AT_hi_user";
case DW_AT_APPLE_optimized: return "DW_AT_APPLE_optimized";
case DW_AT_APPLE_flags: return "DW_AT_APPLE_flags";
}
assert(0 && "Unknown Dwarf Attribute");
return "";