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IR: Represent -ggnu-pubnames with a flag on the DICompileUnit. 

This allows the flag to be persisted through to LTO.

Differential Revision: https://reviews.llvm.org/D37655

llvm-svn: 313078
This commit is contained in:
Peter Collingbourne 2017-09-12 21:50:41 +00:00
parent e4dacb750d
commit b52e23669c
26 changed files with 196 additions and 181 deletions
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2
clang/include/clang/Driver/Options.td
View File

@ -1596,7 +1596,7 @@ def gno_strict_dwarf : Flag<["-"], "gno-strict-dwarf">, Group<g_flags_Group>;
def gcolumn_info : Flag<["-"], "gcolumn-info">, Group<g_flags_Group>, Flags<[CoreOption]>;
def gno_column_info : Flag<["-"], "gno-column-info">, Group<g_flags_Group>, Flags<[CoreOption]>;
def gsplit_dwarf : Flag<["-"], "gsplit-dwarf">, Group<g_flags_Group>;
def ggnu_pubnames : Flag<["-"], "ggnu-pubnames">, Group<g_flags_Group>;
def ggnu_pubnames : Flag<["-"], "ggnu-pubnames">, Group<g_flags_Group>, Flags<[CC1Option]>;
def gdwarf_aranges : Flag<["-"], "gdwarf-aranges">, Group<g_flags_Group>;
def gmodules : Flag <["-"], "gmodules">, Group<gN_Group>,
HelpText<"Generate debug info with external references to clang modules"

3
clang/include/clang/Frontend/CodeGenOptions.def
View File

@ -287,6 +287,9 @@ CODEGENOPT(DebugInfoForProfiling, 1, 0)
/// Whether 3-component vector type is preserved.
CODEGENOPT(PreserveVec3Type, 1, 0)
/// Whether to emit .debug_gnu_pubnames section instead of .debug_pubnames.
CODEGENOPT(GnuPubnames, 1, 0)
#undef CODEGENOPT
#undef ENUM_CODEGENOPT
#undef VALUE_CODEGENOPT

3
clang/lib/CodeGen/CGDebugInfo.cpp
View File

@ -562,7 +562,8 @@ void CGDebugInfo::CreateCompileUnit() {
Producer, LO.Optimize || CGOpts.PrepareForLTO || CGOpts.EmitSummaryIndex,
CGOpts.DwarfDebugFlags, RuntimeVers,
CGOpts.EnableSplitDwarf ? "" : CGOpts.SplitDwarfFile, EmissionKind,
0 /* DWOid */, CGOpts.SplitDwarfInlining, CGOpts.DebugInfoForProfiling);
0 /* DWOid */, CGOpts.SplitDwarfInlining, CGOpts.DebugInfoForProfiling,
CGOpts.GnuPubnames);
}
llvm::DIType *CGDebugInfo::CreateType(const BuiltinType *BT) {

6
clang/lib/Driver/ToolChains/Clang.cpp
View File

@ -2952,10 +2952,8 @@ static void RenderDebugOptions(const ToolChain &TC, const Driver &D,
CmdArgs.push_back("-debug-info-macro");
// -ggnu-pubnames turns on gnu style pubnames in the backend.
if (Args.hasArg(options::OPT_ggnu_pubnames)) {
CmdArgs.push_back("-backend-option");
CmdArgs.push_back("-generate-gnu-dwarf-pub-sections");
}
if (Args.hasArg(options::OPT_ggnu_pubnames))
CmdArgs.push_back("-ggnu-pubnames");
// -gdwarf-aranges turns on the emission of the aranges section in the
// backend.

1
clang/lib/Frontend/CompilerInvocation.cpp
View File

@ -564,6 +564,7 @@ static bool ParseCodeGenArgs(CodeGenOptions &Opts, ArgList &Args, InputKind IK,
Opts.SampleProfileFile = Args.getLastArgValue(OPT_fprofile_sample_use_EQ);
Opts.DebugInfoForProfiling = Args.hasFlag(
OPT_fdebug_info_for_profiling, OPT_fno_debug_info_for_profiling, false);
Opts.GnuPubnames = Args.hasArg(OPT_ggnu_pubnames);
setPGOInstrumentor(Opts, Args, Diags);
Opts.InstrProfileOutput =

2
clang/test/Driver/debug-options.c
View File

@ -219,7 +219,7 @@
//
// GIGNORE-NOT: "argument unused during compilation"
//
// GOPT: -generate-gnu-dwarf-pub-sections
// GOPT: -ggnu-pubnames
//
// GARANGE: -generate-arange-section
//

5
llvm/include/llvm/IR/DIBuilder.h
View File

@ -112,6 +112,8 @@ namespace llvm {
/// \param SplitDebugInlining Whether to emit inline debug info.
/// \param DebugInfoForProfiling Whether to emit extra debug info for
/// profile collection.
/// \param GnuPubnames Whether to emit .debug_gnu_pubnames section instead
/// of .debug_pubnames.
DICompileUnit *
createCompileUnit(unsigned Lang, DIFile *File, StringRef Producer,
bool isOptimized, StringRef Flags, unsigned RV,
@ -119,7 +121,8 @@ namespace llvm {
DICompileUnit::DebugEmissionKind Kind =
DICompileUnit::DebugEmissionKind::FullDebug,
uint64_t DWOId = 0, bool SplitDebugInlining = true,
bool DebugInfoForProfiling = false);
bool DebugInfoForProfiling = false,
bool GnuPubnames = false);
/// Create a file descriptor to hold debugging information for a file.
/// \param Filename File name.

36
llvm/include/llvm/IR/DebugInfoMetadata.h
View File

@ -1068,16 +1068,17 @@ private:
uint64_t DWOId;
bool SplitDebugInlining;
bool DebugInfoForProfiling;
bool GnuPubnames;
DICompileUnit(LLVMContext &C, StorageType Storage, unsigned SourceLanguage,
bool IsOptimized, unsigned RuntimeVersion,
unsigned EmissionKind, uint64_t DWOId, bool SplitDebugInlining,
bool DebugInfoForProfiling, ArrayRef<Metadata *> Ops)
bool DebugInfoForProfiling, bool GnuPubnames, ArrayRef<Metadata *> Ops)
: DIScope(C, DICompileUnitKind, Storage, dwarf::DW_TAG_compile_unit, Ops),
SourceLanguage(SourceLanguage), IsOptimized(IsOptimized),
RuntimeVersion(RuntimeVersion), EmissionKind(EmissionKind),
DWOId(DWOId), SplitDebugInlining(SplitDebugInlining),
DebugInfoForProfiling(DebugInfoForProfiling) {
DebugInfoForProfiling(DebugInfoForProfiling), GnuPubnames(GnuPubnames) {
assert(Storage != Uniqued);
}
~DICompileUnit() = default;
@ -1091,15 +1092,14 @@ private:
DIGlobalVariableExpressionArray GlobalVariables,
DIImportedEntityArray ImportedEntities, DIMacroNodeArray Macros,
uint64_t DWOId, bool SplitDebugInlining, bool DebugInfoForProfiling,
StorageType Storage, bool ShouldCreate = true) {
return getImpl(Context, SourceLanguage, File,
getCanonicalMDString(Context, Producer), IsOptimized,
getCanonicalMDString(Context, Flags), RuntimeVersion,
getCanonicalMDString(Context, SplitDebugFilename),
EmissionKind, EnumTypes.get(), RetainedTypes.get(),
GlobalVariables.get(), ImportedEntities.get(), Macros.get(),
DWOId, SplitDebugInlining, DebugInfoForProfiling, Storage,
ShouldCreate);
bool GnuPubnames, StorageType Storage, bool ShouldCreate = true) {
return getImpl(
Context, SourceLanguage, File, getCanonicalMDString(Context, Producer),
IsOptimized, getCanonicalMDString(Context, Flags), RuntimeVersion,
getCanonicalMDString(Context, SplitDebugFilename), EmissionKind,
EnumTypes.get(), RetainedTypes.get(), GlobalVariables.get(),
ImportedEntities.get(), Macros.get(), DWOId, SplitDebugInlining,
DebugInfoForProfiling, GnuPubnames, Storage, ShouldCreate);
}
static DICompileUnit *
getImpl(LLVMContext &Context, unsigned SourceLanguage, Metadata *File,
@ -1108,7 +1108,7 @@ private:
unsigned EmissionKind, Metadata *EnumTypes, Metadata *RetainedTypes,
Metadata *GlobalVariables, Metadata *ImportedEntities,
Metadata *Macros, uint64_t DWOId, bool SplitDebugInlining,
bool DebugInfoForProfiling, StorageType Storage,
bool DebugInfoForProfiling, bool GnuPubnames, StorageType Storage,
bool ShouldCreate = true);
TempDICompileUnit cloneImpl() const {
@ -1118,7 +1118,7 @@ private:
getEmissionKind(), getEnumTypes(), getRetainedTypes(),
getGlobalVariables(), getImportedEntities(),
getMacros(), DWOId, getSplitDebugInlining(),
getDebugInfoForProfiling());
getDebugInfoForProfiling(), getGnuPubnames());
}
public:
@ -1133,11 +1133,12 @@ public:
DICompositeTypeArray EnumTypes, DIScopeArray RetainedTypes,
DIGlobalVariableExpressionArray GlobalVariables,
DIImportedEntityArray ImportedEntities, DIMacroNodeArray Macros,
uint64_t DWOId, bool SplitDebugInlining, bool DebugInfoForProfiling),
uint64_t DWOId, bool SplitDebugInlining, bool DebugInfoForProfiling,
bool GnuPubnames),
(SourceLanguage, File, Producer, IsOptimized, Flags, RuntimeVersion,
SplitDebugFilename, EmissionKind, EnumTypes, RetainedTypes,
GlobalVariables, ImportedEntities, Macros, DWOId, SplitDebugInlining,
DebugInfoForProfiling))
DebugInfoForProfiling, GnuPubnames))
DEFINE_MDNODE_GET_DISTINCT_TEMPORARY(
DICompileUnit,
(unsigned SourceLanguage, Metadata *File, MDString *Producer,
@ -1145,11 +1146,11 @@ public:
MDString *SplitDebugFilename, unsigned EmissionKind, Metadata *EnumTypes,
Metadata *RetainedTypes, Metadata *GlobalVariables,
Metadata *ImportedEntities, Metadata *Macros, uint64_t DWOId,
bool SplitDebugInlining, bool DebugInfoForProfiling),
bool SplitDebugInlining, bool DebugInfoForProfiling, bool GnuPubnames),
(SourceLanguage, File, Producer, IsOptimized, Flags, RuntimeVersion,
SplitDebugFilename, EmissionKind, EnumTypes, RetainedTypes,
GlobalVariables, ImportedEntities, Macros, DWOId, SplitDebugInlining,
DebugInfoForProfiling))
DebugInfoForProfiling, GnuPubnames))
TempDICompileUnit clone() const { return cloneImpl(); }
@ -1160,6 +1161,7 @@ public:
return (DebugEmissionKind)EmissionKind;
}
bool getDebugInfoForProfiling() const { return DebugInfoForProfiling; }
bool getGnuPubnames() const { return GnuPubnames; }
StringRef getProducer() const { return getStringOperand(1); }
StringRef getFlags() const { return getStringOperand(2); }
StringRef getSplitDebugFilename() const { return getStringOperand(3); }

5
llvm/lib/AsmParser/LLParser.cpp
View File

@ -4099,7 +4099,8 @@ bool LLParser::ParseDICompileUnit(MDNode *&Result, bool IsDistinct) {
OPTIONAL(macros, MDField, ); \
OPTIONAL(dwoId, MDUnsignedField, ); \
OPTIONAL(splitDebugInlining, MDBoolField, = true); \
OPTIONAL(debugInfoForProfiling, MDBoolField, = false);
OPTIONAL(debugInfoForProfiling, MDBoolField, = false); \
OPTIONAL(gnuPubnames, MDBoolField, = false);
PARSE_MD_FIELDS();
#undef VISIT_MD_FIELDS
@ -4107,7 +4108,7 @@ bool LLParser::ParseDICompileUnit(MDNode *&Result, bool IsDistinct) {
Context, language.Val, file.Val, producer.Val, isOptimized.Val, flags.Val,
runtimeVersion.Val, splitDebugFilename.Val, emissionKind.Val, enums.Val,
retainedTypes.Val, globals.Val, imports.Val, macros.Val, dwoId.Val,
splitDebugInlining.Val, debugInfoForProfiling.Val);
splitDebugInlining.Val, debugInfoForProfiling.Val, gnuPubnames.Val);
return false;
}

5
llvm/lib/Bitcode/Reader/MetadataLoader.cpp
View File

@ -1355,7 +1355,7 @@ Error MetadataLoader::MetadataLoaderImpl::parseOneMetadata(
break;
}
case bitc::METADATA_COMPILE_UNIT: {
if (Record.size() < 14 || Record.size() > 18)
if (Record.size() < 14 || Record.size() > 19)
return error("Invalid record");
// Ignore Record[0], which indicates whether this compile unit is
@ -1369,7 +1369,8 @@ Error MetadataLoader::MetadataLoaderImpl::parseOneMetadata(
Record.size() <= 15 ? nullptr : getMDOrNull(Record[15]),
Record.size() <= 14 ? 0 : Record[14],
Record.size() <= 16 ? true : Record[16],
Record.size() <= 17 ? false : Record[17]);
Record.size() <= 17 ? false : Record[17],
Record.size() <= 18 ? false : Record[18]);
MetadataList.assignValue(CU, NextMetadataNo);
NextMetadataNo++;

1
llvm/lib/Bitcode/Writer/BitcodeWriter.cpp
View File

@ -1555,6 +1555,7 @@ void ModuleBitcodeWriter::writeDICompileUnit(const DICompileUnit *N,
Record.push_back(VE.getMetadataOrNullID(N->getMacros().get()));
Record.push_back(N->getSplitDebugInlining());
Record.push_back(N->getDebugInfoForProfiling());
Record.push_back(N->getGnuPubnames());
Stream.EmitRecord(bitc::METADATA_COMPILE_UNIT, Record, Abbrev);
Record.clear();

30
llvm/lib/CodeGen/AsmPrinter/DwarfCompileUnit.cpp
View File

@ -52,6 +52,16 @@
using namespace llvm;
enum DefaultOnOff { Default, Enable, Disable };
static cl::opt<DefaultOnOff>
DwarfPubSections("generate-dwarf-pub-sections", cl::Hidden,
cl::desc("Generate DWARF pubnames and pubtypes sections"),
cl::values(clEnumVal(Default, "Default for platform"),
clEnumVal(Enable, "Enabled"),
clEnumVal(Disable, "Disabled")),
cl::init(Default));
DwarfCompileUnit::DwarfCompileUnit(unsigned UID, const DICompileUnit *Node,
AsmPrinter *A, DwarfDebug *DW,
DwarfFile *DWU)
@ -755,10 +765,22 @@ void DwarfCompileUnit::emitHeader(bool UseOffsets) {
DwarfUnit::emitCommonHeader(UseOffsets, UT);
}
bool DwarfCompileUnit::hasDwarfPubSections() const {
// Opting in to GNU Pubnames/types overrides the default to ensure these are
// generated for things like Gold's gdb_index generation.
if (CUNode->getGnuPubnames())
return true;
if (DwarfPubSections == Default)
return DD->tuneForGDB() && !includeMinimalInlineScopes();
return DwarfPubSections == Enable;
}
/// addGlobalName - Add a new global name to the compile unit.
void DwarfCompileUnit::addGlobalName(StringRef Name, const DIE &Die,
const DIScope *Context) {
if (!DD->hasDwarfPubSections(includeMinimalInlineScopes()))
if (!hasDwarfPubSections())
return;
std::string FullName = getParentContextString(Context) + Name.str();
GlobalNames[FullName] = &Die;
@ -766,7 +788,7 @@ void DwarfCompileUnit::addGlobalName(StringRef Name, const DIE &Die,
void DwarfCompileUnit::addGlobalNameForTypeUnit(StringRef Name,
const DIScope *Context) {
if (!DD->hasDwarfPubSections(includeMinimalInlineScopes()))
if (!hasDwarfPubSections())
return;
std::string FullName = getParentContextString(Context) + Name.str();
// Insert, allowing the entry to remain as-is if it's already present
@ -779,7 +801,7 @@ void DwarfCompileUnit::addGlobalNameForTypeUnit(StringRef Name,
/// Add a new global type to the unit.
void DwarfCompileUnit::addGlobalType(const DIType *Ty, const DIE &Die,
const DIScope *Context) {
if (!DD->hasDwarfPubSections(includeMinimalInlineScopes()))
if (!hasDwarfPubSections())
return;
std::string FullName = getParentContextString(Context) + Ty->getName().str();
GlobalTypes[FullName] = &Die;
@ -787,7 +809,7 @@ void DwarfCompileUnit::addGlobalType(const DIType *Ty, const DIE &Die,
void DwarfCompileUnit::addGlobalTypeUnitType(const DIType *Ty,
const DIScope *Context) {
if (!DD->hasDwarfPubSections(includeMinimalInlineScopes()))
if (!hasDwarfPubSections())
return;
std::string FullName = getParentContextString(Context) + Ty->getName().str();
// Insert, allowing the entry to remain as-is if it's already present

2
llvm/lib/CodeGen/AsmPrinter/DwarfCompileUnit.h
View File

@ -289,6 +289,8 @@ public:
void setBaseAddress(const MCSymbol *Base) { BaseAddress = Base; }
const MCSymbol *getBaseAddress() const { return BaseAddress; }
bool hasDwarfPubSections() const;
};
} // end namespace llvm

159
llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
View File

@ -89,11 +89,6 @@ static cl::opt<bool> UseDwarfRangesBaseAddressSpecifier(
"use-dwarf-ranges-base-address-specifier", cl::Hidden,
cl::desc("Use base address specifiers in debug_ranges"), cl::init(false));
static cl::opt<bool>
GenerateGnuPubSections("generate-gnu-dwarf-pub-sections", cl::Hidden,
cl::desc("Generate GNU-style pubnames and pubtypes"),
cl::init(false));
static cl::opt<bool> GenerateARangeSection("generate-arange-section",
cl::Hidden,
cl::desc("Generate dwarf aranges"),
@ -120,14 +115,6 @@ DwarfAccelTables("dwarf-accel-tables", cl::Hidden,
clEnumVal(Disable, "Disabled")),
cl::init(Default));
static cl::opt<DefaultOnOff>
DwarfPubSections("generate-dwarf-pub-sections", cl::Hidden,
cl::desc("Generate DWARF pubnames and pubtypes sections"),
cl::values(clEnumVal(Default, "Default for platform"),
clEnumVal(Enable, "Enabled"),
clEnumVal(Disable, "Disabled")),
cl::init(Default));
enum LinkageNameOption {
DefaultLinkageNames,
AllLinkageNames,
@ -414,20 +401,8 @@ void DwarfDebug::constructAbstractSubprogramScopeDIE(DwarfCompileUnit &SrcCU,
}
}
bool DwarfDebug::hasDwarfPubSections(bool includeMinimalInlineScopes) const {
// Opting in to GNU Pubnames/types overrides the default to ensure these are
// generated for things like Gold's gdb_index generation.
if (GenerateGnuPubSections)
return true;
if (DwarfPubSections == Default)
return tuneForGDB() && !includeMinimalInlineScopes;
return DwarfPubSections == Enable;
}
void DwarfDebug::addGnuPubAttributes(DwarfCompileUnit &U, DIE &D) const {
if (!hasDwarfPubSections(U.includeMinimalInlineScopes()))
if (!U.hasDwarfPubSections())
return;
U.addFlag(D, dwarf::DW_AT_GNU_pubnames);
@ -792,12 +767,7 @@ void DwarfDebug::endModule() {
}
// Emit the pubnames and pubtypes sections if requested.
// The condition is optimistically correct - any CU not using GMLT (&
// implicit/default pubnames state) might still have pubnames.
if (hasDwarfPubSections(/* gmlt */ false)) {
emitDebugPubNames(GenerateGnuPubSections);
emitDebugPubTypes(GenerateGnuPubSections);
}
emitDebugPubSections();
// clean up.
// FIXME: AbstractVariables.clear();
@ -1493,83 +1463,74 @@ static dwarf::PubIndexEntryDescriptor computeIndexValue(DwarfUnit *CU,
}
}
/// emitDebugPubNames - Emit visible names into a debug pubnames section.
void DwarfDebug::emitDebugPubNames(bool GnuStyle) {
MCSection *PSec = GnuStyle
? Asm->getObjFileLowering().getDwarfGnuPubNamesSection()
: Asm->getObjFileLowering().getDwarfPubNamesSection();
emitDebugPubSection(GnuStyle, PSec, "Names",
&DwarfCompileUnit::getGlobalNames);
}
void DwarfDebug::emitDebugPubSection(
bool GnuStyle, MCSection *PSec, StringRef Name,
const StringMap<const DIE *> &(DwarfCompileUnit::*Accessor)() const) {
/// emitDebugPubSections - Emit visible names and types into debug pubnames and
/// pubtypes sections.
void DwarfDebug::emitDebugPubSections() {
for (const auto &NU : CUMap) {
DwarfCompileUnit *TheU = NU.second;
const auto &Globals = (TheU->*Accessor)();
if (!hasDwarfPubSections(TheU->includeMinimalInlineScopes()))
if (!TheU->hasDwarfPubSections())
continue;
if (auto *Skeleton = TheU->getSkeleton())
TheU = Skeleton;
bool GnuStyle = TheU->getCUNode()->getGnuPubnames();
// Start the dwarf pubnames section.
Asm->OutStreamer->SwitchSection(PSec);
Asm->OutStreamer->SwitchSection(
GnuStyle ? Asm->getObjFileLowering().getDwarfGnuPubNamesSection()
: Asm->getObjFileLowering().getDwarfPubNamesSection());
emitDebugPubSection(GnuStyle, "Names", TheU, TheU->getGlobalNames());
// Emit the header.
Asm->OutStreamer->AddComment("Length of Public " + Name + " Info");
MCSymbol *BeginLabel = Asm->createTempSymbol("pub" + Name + "_begin");
MCSymbol *EndLabel = Asm->createTempSymbol("pub" + Name + "_end");
Asm->EmitLabelDifference(EndLabel, BeginLabel, 4);
Asm->OutStreamer->EmitLabel(BeginLabel);
Asm->OutStreamer->AddComment("DWARF Version");
Asm->EmitInt16(dwarf::DW_PUBNAMES_VERSION);
Asm->OutStreamer->AddComment("Offset of Compilation Unit Info");
Asm->emitDwarfSymbolReference(TheU->getLabelBegin());
Asm->OutStreamer->AddComment("Compilation Unit Length");
Asm->EmitInt32(TheU->getLength());
// Emit the pubnames for this compilation unit.
for (const auto &GI : Globals) {
const char *Name = GI.getKeyData();
const DIE *Entity = GI.second;
Asm->OutStreamer->AddComment("DIE offset");
Asm->EmitInt32(Entity->getOffset());
if (GnuStyle) {
dwarf::PubIndexEntryDescriptor Desc = computeIndexValue(TheU, Entity);
Asm->OutStreamer->AddComment(
Twine("Kind: ") + dwarf::GDBIndexEntryKindString(Desc.Kind) + ", " +
dwarf::GDBIndexEntryLinkageString(Desc.Linkage));
Asm->EmitInt8(Desc.toBits());
}
Asm->OutStreamer->AddComment("External Name");
Asm->OutStreamer->EmitBytes(StringRef(Name, GI.getKeyLength() + 1));
}
Asm->OutStreamer->AddComment("End Mark");
Asm->EmitInt32(0);
Asm->OutStreamer->EmitLabel(EndLabel);
Asm->OutStreamer->SwitchSection(
GnuStyle ? Asm->getObjFileLowering().getDwarfGnuPubTypesSection()
: Asm->getObjFileLowering().getDwarfPubTypesSection());
emitDebugPubSection(GnuStyle, "Types", TheU, TheU->getGlobalTypes());
}
}
void DwarfDebug::emitDebugPubTypes(bool GnuStyle) {
MCSection *PSec = GnuStyle
? Asm->getObjFileLowering().getDwarfGnuPubTypesSection()
: Asm->getObjFileLowering().getDwarfPubTypesSection();
void DwarfDebug::emitDebugPubSection(bool GnuStyle, StringRef Name,
DwarfCompileUnit *TheU,
const StringMap<const DIE *> &Globals) {
if (auto *Skeleton = TheU->getSkeleton())
TheU = Skeleton;
emitDebugPubSection(GnuStyle, PSec, "Types",
&DwarfCompileUnit::getGlobalTypes);
// Emit the header.
Asm->OutStreamer->AddComment("Length of Public " + Name + " Info");
MCSymbol *BeginLabel = Asm->createTempSymbol("pub" + Name + "_begin");
MCSymbol *EndLabel = Asm->createTempSymbol("pub" + Name + "_end");
Asm->EmitLabelDifference(EndLabel, BeginLabel, 4);
Asm->OutStreamer->EmitLabel(BeginLabel);
Asm->OutStreamer->AddComment("DWARF Version");
Asm->EmitInt16(dwarf::DW_PUBNAMES_VERSION);
Asm->OutStreamer->AddComment("Offset of Compilation Unit Info");
Asm->emitDwarfSymbolReference(TheU->getLabelBegin());
Asm->OutStreamer->AddComment("Compilation Unit Length");
Asm->EmitInt32(TheU->getLength());
// Emit the pubnames for this compilation unit.
for (const auto &GI : Globals) {
const char *Name = GI.getKeyData();
const DIE *Entity = GI.second;
Asm->OutStreamer->AddComment("DIE offset");
Asm->EmitInt32(Entity->getOffset());
if (GnuStyle) {
dwarf::PubIndexEntryDescriptor Desc = computeIndexValue(TheU, Entity);
Asm->OutStreamer->AddComment(
Twine("Kind: ") + dwarf::GDBIndexEntryKindString(Desc.Kind) + ", " +
dwarf::GDBIndexEntryLinkageString(Desc.Linkage));
Asm->EmitInt8(Desc.toBits());
}
Asm->OutStreamer->AddComment("External Name");
Asm->OutStreamer->EmitBytes(StringRef(Name, GI.getKeyLength() + 1));
}
Asm->OutStreamer->AddComment("End Mark");
Asm->EmitInt32(0);
Asm->OutStreamer->EmitLabel(EndLabel);
}
/// Emit null-terminated strings into a debug str section.

38
llvm/lib/CodeGen/AsmPrinter/DwarfDebug.h
View File

@ -314,16 +314,6 @@ class DwarfDebug : public DebugHandlerBase {
// Identify a debugger for "tuning" the debug info.
DebuggerKind DebuggerTuning = DebuggerKind::Default;
/// \defgroup DebuggerTuning Predicates to tune DWARF for a given debugger.
///
/// Returns whether we are "tuning" for a given debugger.
/// Should be used only within the constructor, to set feature flags.
/// @{
bool tuneForGDB() const { return DebuggerTuning == DebuggerKind::GDB; }
bool tuneForLLDB() const { return DebuggerTuning == DebuggerKind::LLDB; }
bool tuneForSCE() const { return DebuggerTuning == DebuggerKind::SCE; }
/// @}
MCDwarfDwoLineTable *getDwoLineTable(const DwarfCompileUnit &);
const SmallVectorImpl<std::unique_ptr<DwarfCompileUnit>> &getUnits() {
@ -374,21 +364,12 @@ class DwarfDebug : public DebugHandlerBase {
/// Emit type dies into a hashed accelerator table.
void emitAccelTypes();
/// Emit visible names into a debug pubnames section.
/// \param GnuStyle determines whether or not we want to emit
/// additional information into the table ala newer gcc for gdb
/// index.
void emitDebugPubNames(bool GnuStyle = false);
/// Emit visible names and types into debug pubnames and pubtypes sections.
void emitDebugPubSections();
/// Emit visible types into a debug pubtypes section.
/// \param GnuStyle determines whether or not we want to emit
/// additional information into the table ala newer gcc for gdb
/// index.
void emitDebugPubTypes(bool GnuStyle = false);
void emitDebugPubSection(
bool GnuStyle, MCSection *PSec, StringRef Name,
const StringMap<const DIE *> &(DwarfCompileUnit::*Accessor)() const);
void emitDebugPubSection(bool GnuStyle, StringRef Name,
DwarfCompileUnit *TheU,
const StringMap<const DIE *> &Globals);
/// Emit null-terminated strings into a debug str section.
void emitDebugStr();
@ -577,7 +558,14 @@ public:
/// going to be null.
bool isLexicalScopeDIENull(LexicalScope *Scope);
bool hasDwarfPubSections(bool includeMinimalInlineScopes) const;
/// \defgroup DebuggerTuning Predicates to tune DWARF for a given debugger.
///
/// Returns whether we are "tuning" for a given debugger.
/// @{
bool tuneForGDB() const { return DebuggerTuning == DebuggerKind::GDB; }
bool tuneForLLDB() const { return DebuggerTuning == DebuggerKind::LLDB; }
bool tuneForSCE() const { return DebuggerTuning == DebuggerKind::SCE; }
/// @}
};
} // end namespace llvm

1
llvm/lib/IR/AsmWriter.cpp
View File

@ -1742,6 +1742,7 @@ static void writeDICompileUnit(raw_ostream &Out, const DICompileUnit *N,
Printer.printBool("splitDebugInlining", N->getSplitDebugInlining(), true);
Printer.printBool("debugInfoForProfiling", N->getDebugInfoForProfiling(),
false);
Printer.printBool("gnuPubnames", N->getGnuPubnames(), false);
Out << ")";
}

4
llvm/lib/IR/DIBuilder.cpp
View File

@ -127,7 +127,7 @@ DICompileUnit *DIBuilder::createCompileUnit(
unsigned Lang, DIFile *File, StringRef Producer, bool isOptimized,
StringRef Flags, unsigned RunTimeVer, StringRef SplitName,
DICompileUnit::DebugEmissionKind Kind, uint64_t DWOId,
bool SplitDebugInlining, bool DebugInfoForProfiling) {
bool SplitDebugInlining, bool DebugInfoForProfiling, bool GnuPubnames) {
assert(((Lang <= dwarf::DW_LANG_Fortran08 && Lang >= dwarf::DW_LANG_C89) ||
(Lang <= dwarf::DW_LANG_hi_user && Lang >= dwarf::DW_LANG_lo_user)) &&
@ -137,7 +137,7 @@ DICompileUnit *DIBuilder::createCompileUnit(
CUNode = DICompileUnit::getDistinct(
VMContext, Lang, File, Producer, isOptimized, Flags, RunTimeVer,
SplitName, Kind, nullptr, nullptr, nullptr, nullptr, nullptr, DWOId,
SplitDebugInlining, DebugInfoForProfiling);
SplitDebugInlining, DebugInfoForProfiling, GnuPubnames);
// Create a named metadata so that it is easier to find cu in a module.
NamedMDNode *NMD = M.getOrInsertNamedMetadata("llvm.dbg.cu");

2
llvm/lib/IR/DebugInfo.cpp
View File

@ -473,7 +473,7 @@ private:
CU->getSplitDebugFilename(), DICompileUnit::LineTablesOnly, EnumTypes,
RetainedTypes, GlobalVariables, ImportedEntities, CU->getMacros(),
CU->getDWOId(), CU->getSplitDebugInlining(),
CU->getDebugInfoForProfiling());
CU->getDebugInfoForProfiling(), CU->getGnuPubnames());
}
DILocation *getReplacementMDLocation(DILocation *MLD) {

11
llvm/lib/IR/DebugInfoMetadata.cpp
View File

@ -391,7 +391,7 @@ DICompileUnit *DICompileUnit::getImpl(
unsigned EmissionKind, Metadata *EnumTypes, Metadata *RetainedTypes,
Metadata *GlobalVariables, Metadata *ImportedEntities, Metadata *Macros,
uint64_t DWOId, bool SplitDebugInlining, bool DebugInfoForProfiling,
StorageType Storage, bool ShouldCreate) {
bool GnuPubnames, StorageType Storage, bool ShouldCreate) {
assert(Storage != Uniqued && "Cannot unique DICompileUnit");
assert(isCanonical(Producer) && "Expected canonical MDString");
assert(isCanonical(Flags) && "Expected canonical MDString");
@ -401,11 +401,10 @@ DICompileUnit *DICompileUnit::getImpl(
File, Producer, Flags, SplitDebugFilename,
EnumTypes, RetainedTypes, GlobalVariables, ImportedEntities,
Macros};
return storeImpl(new (array_lengthof(Ops))
DICompileUnit(Context, Storage, SourceLanguage,
IsOptimized, RuntimeVersion, EmissionKind,
DWOId, SplitDebugInlining,
DebugInfoForProfiling, Ops),
return storeImpl(new (array_lengthof(Ops)) DICompileUnit(
Context, Storage, SourceLanguage, IsOptimized,
RuntimeVersion, EmissionKind, DWOId, SplitDebugInlining,
DebugInfoForProfiling, GnuPubnames, Ops),
Storage);
}

6
llvm/test/Bitcode/dicompileunit-gnu-pubnames.ll Normal file
View File

@ -0,0 +1,6 @@
; RUN: llvm-as -disable-verify -o - %s | llvm-dis | FileCheck %s
!named = !{!0}
; CHECK: !DICompileUnit({{.*}}, gnuPubnames: true)
!0 = distinct !DICompileUnit(language: 12, file: !1, gnuPubnames: true)
!1 = !DIFile(filename: "path/to/file", directory: "/path/to/dir")

4
llvm/test/DebugInfo/X86/gnu-public-names-empty.ll
View File

@ -1,4 +1,4 @@
; RUN: llc -mtriple=x86_64-pc-linux-gnu -generate-gnu-dwarf-pub-sections -filetype=obj < %s | llvm-dwarfdump -v - | FileCheck %s
; RUN: llc -mtriple=x86_64-pc-linux-gnu -filetype=obj < %s | llvm-dwarfdump -v - | FileCheck %s
; Generated from:
@ -17,7 +17,7 @@
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!3, !4}
!0 = distinct !DICompileUnit(language: DW_LANG_C99, producer: "clang version 3.4 (trunk 191846) (llvm/trunk 191866)", isOptimized: false, emissionKind: FullDebug, file: !1, enums: !2, retainedTypes: !5, globals: !2, imports: !2)
!0 = distinct !DICompileUnit(language: DW_LANG_C99, producer: "clang version 3.4 (trunk 191846) (llvm/trunk 191866)", isOptimized: false, emissionKind: FullDebug, file: !1, enums: !2, retainedTypes: !5, globals: !2, imports: !2, gnuPubnames: true)
!1 = !DIFile(filename: "foo.c", directory: "/usr/local/google/home/echristo/tmp")
!2 = !{}
!3 = !{i32 2, !"Dwarf Version", i32 4}

4
llvm/test/DebugInfo/X86/gnu-public-names-gmlt.ll
View File

@ -1,4 +1,4 @@
; RUN: llc -mtriple=x86_64-pc-linux-gnu -filetype=obj < %s -generate-gnu-dwarf-pub-sections | llvm-dwarfdump -v - | FileCheck --check-prefix=GPUB --check-prefix=CHECK %s
; RUN: sed -e 's/gnuPubnames: false/gnuPubnames: true/' %s | llc -mtriple=x86_64-pc-linux-gnu -filetype=obj | llvm-dwarfdump -v - | FileCheck --check-prefix=GPUB --check-prefix=CHECK %s
; RUN: llc -mtriple=x86_64-pc-linux-gnu -filetype=obj < %s -generate-dwarf-pub-sections=Enable | llvm-dwarfdump -v - | FileCheck --check-prefix=PUB --check-prefix=CHECK %s
; RUN: llc -mtriple=x86_64-pc-linux-gnu -filetype=obj < %s | llvm-dwarfdump -v - | FileCheck --check-prefix=NONE %s
@ -53,7 +53,7 @@ attributes #1 = { "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-
!llvm.module.flags = !{!3, !4, !5}
!llvm.ident = !{!6}
!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "clang version 5.0.0 (trunk 303768) (llvm/trunk 303774)", isOptimized: false, runtimeVersion: 0, emissionKind: LineTablesOnly, enums: !2)
!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "clang version 5.0.0 (trunk 303768) (llvm/trunk 303774)", isOptimized: false, runtimeVersion: 0, emissionKind: LineTablesOnly, enums: !2, gnuPubnames: false)
!1 = !DIFile(filename: "gnu-public-names-gmlt.cpp", directory: "/usr/local/google/home/blaikie/dev/scratch")
!2 = !{}
!3 = !{i32 2, !"Dwarf Version", i32 4}

24
llvm/test/DebugInfo/X86/gnu-public-names-multiple-cus.ll Normal file
View File

@ -0,0 +1,24 @@
; RUN: llc < %s | FileCheck %s
!llvm.dbg.cu = !{!4, !11}
!llvm.module.flags = !{!7}
; CHECK: .section .debug_pubnames
; CHECK: .asciz "a"
!0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression())
!1 = !DIGlobalVariable(name: "a", scope: null, file: !2, line: 2, type: !3, isLocal: false, isDefinition: true)
!2 = !DIFile(filename: "g.c", directory: "/tmp")
!3 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
!4 = distinct !DICompileUnit(language: DW_LANG_C99, file: !2, producer: "clang", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !5, retainedTypes: !5, globals: !6)
!5 = !{}
!6 = !{!0}
!7 = !{i32 1, !"Debug Info Version", i32 3}
; CHECK: .section .debug_gnu_pubnames
; CHECK: .asciz "b"
!8 = !DIGlobalVariableExpression(var: !9, expr: !DIExpression())
!9 = !DIGlobalVariable(name: "b", scope: null, file: !2, line: 2, type: !3, isLocal: false, isDefinition: true)
!10 = !{!8}
!11 = distinct !DICompileUnit(language: DW_LANG_C99, file: !2, producer: "clang", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !5, retainedTypes: !5, globals: !10, gnuPubnames: true)

4
llvm/test/DebugInfo/X86/gnu-public-names-tu.ll
View File

@ -1,4 +1,4 @@
; RUN: llc -mtriple=x86_64-pc-linux-gnu -generate-type-units -generate-gnu-dwarf-pub-sections -filetype=obj < %s | llvm-dwarfdump -v - | FileCheck %s
; RUN: llc -mtriple=x86_64-pc-linux-gnu -generate-type-units -filetype=obj < %s | llvm-dwarfdump -v - | FileCheck %s
; Generated from:
@ -39,7 +39,7 @@
!0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression())
!1 = distinct !DIGlobalVariable(name: "b", scope: !2, file: !3, line: 8, type: !6, isLocal: false, isDefinition: true)
!2 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !3, producer: "clang version 5.0.0 (trunk 293904) (llvm/trunk 293908)", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !4, globals: !5)
!2 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !3, producer: "clang version 5.0.0 (trunk 293904) (llvm/trunk 293908)", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !4, globals: !5, gnuPubnames: true)
!3 = !DIFile(filename: "type.cpp", directory: "/tmp/dbginfo")
!4 = !{}
!5 = !{!0}

6
llvm/test/DebugInfo/X86/gnu-public-names.ll
View File

@ -1,5 +1,5 @@
; RUN: llc -mtriple=x86_64-pc-linux-gnu -generate-gnu-dwarf-pub-sections < %s | FileCheck -check-prefix=ASM %s
; RUN: llc -mtriple=x86_64-pc-linux-gnu -generate-gnu-dwarf-pub-sections -filetype=obj < %s | llvm-dwarfdump -v - | FileCheck %s
; RUN: llc -mtriple=x86_64-pc-linux-gnu < %s | FileCheck -check-prefix=ASM %s
; RUN: llc -mtriple=x86_64-pc-linux-gnu -filetype=obj < %s | llvm-dwarfdump -v - | FileCheck %s
; ModuleID = 'dwarf-public-names.cpp'
;
; Generated from:
@ -302,7 +302,7 @@ attributes #1 = { nounwind readnone }
!0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression())
!1 = !DIGlobalVariable(name: "static_member_variable", linkageName: "_ZN1C22static_member_variableE", scope: !2, file: !3, line: 7, type: !9, isLocal: false, isDefinition: true, declaration: !8)
!2 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !3, producer: "clang version 3.7.0 (trunk 234897) (llvm/trunk 234911)", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !4, retainedTypes: !5, globals: !21, imports: !44)
!2 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !3, producer: "clang version 3.7.0 (trunk 234897) (llvm/trunk 234911)", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !4, retainedTypes: !5, globals: !21, imports: !44, gnuPubnames: true)
!3 = !DIFile(filename: "gnu-public-names.cpp", directory: "/tmp/dbginfo")
!4 = !{}
!5 = !{!6, !17}

13
llvm/unittests/IR/MetadataTest.cpp
View File

@ -92,10 +92,10 @@ protected:
return DIFile::getDistinct(Context, "file.c", "/path/to/dir");
}
DICompileUnit *getUnit() {
return DICompileUnit::getDistinct(Context, 1, getFile(), "clang", false,
"-g", 2, "", DICompileUnit::FullDebug,
getTuple(), getTuple(), getTuple(),
getTuple(), getTuple(), 0, true, false);
return DICompileUnit::getDistinct(
Context, 1, getFile(), "clang", false, "-g", 2, "",
DICompileUnit::FullDebug, getTuple(), getTuple(), getTuple(),
getTuple(), getTuple(), 0, true, false, false);
}
DIType *getBasicType(StringRef Name) {
return DIBasicType::get(Context, dwarf::DW_TAG_unspecified_type, Name);
@ -1417,7 +1417,7 @@ TEST_F(DICompileUnitTest, get) {
Context, SourceLanguage, File, Producer, IsOptimized, Flags,
RuntimeVersion, SplitDebugFilename, EmissionKind, EnumTypes,
RetainedTypes, GlobalVariables, ImportedEntities, Macros, DWOId, true,
false);
false, false);
EXPECT_EQ(dwarf::DW_TAG_compile_unit, N->getTag());
EXPECT_EQ(SourceLanguage, N->getSourceLanguage());
@ -1474,7 +1474,8 @@ TEST_F(DICompileUnitTest, replaceArrays) {
auto *N = DICompileUnit::getDistinct(
Context, SourceLanguage, File, Producer, IsOptimized, Flags,
RuntimeVersion, SplitDebugFilename, EmissionKind, EnumTypes,
RetainedTypes, nullptr, ImportedEntities, nullptr, DWOId, true, false);
RetainedTypes, nullptr, ImportedEntities, nullptr, DWOId, true, false,
false);
auto *GlobalVariables = MDTuple::getDistinct(Context, None);
EXPECT_EQ(nullptr, N->getGlobalVariables().get());