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The DW_AT_GNU_pubnames/pubtypes attributes are actually form

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SEC_OFFSET from the beginning of the section so go ahead and emit
a label at the beginning of each one.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@191710 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Eric Christopher
2013-09-30 23:14:16 +00:00
parent 188f96c111
commit a6d841561b
3 changed files with 82 additions and 28 deletions
Download Patch File Download Diff File Expand all files Collapse all files
lib/CodeGen/AsmPrinter/DwarfDebug.cpp
+57 -6
View File
@@ -777,8 +777,29 @@ CompileUnit *DwarfDebug::constructCompileUnit(const MDNode *N) {
// Flag to let the linker know we have emitted new style pubnames. Only
// emit it here if we don't have a skeleton CU for split dwarf.
if (GenerateGnuPubSections)
NewCU->addFlag(Die, dwarf::DW_AT_GNU_pubnames);
if (GenerateGnuPubSections) {
if (Asm->MAI->doesDwarfUseRelocationsAcrossSections())
NewCU->addLabel(Die, dwarf::DW_AT_GNU_pubnames,
dwarf::DW_FORM_sec_offset,
Asm->GetTempSymbol("gnu_pubnames",
NewCU->getUniqueID()));
else
NewCU->addDelta(Die, dwarf::DW_AT_GNU_pubnames, dwarf::DW_FORM_data4,
Asm->GetTempSymbol("gnu_pubnames",
NewCU->getUniqueID()),
DwarfGnuPubNamesSectionSym);
if (Asm->MAI->doesDwarfUseRelocationsAcrossSections())
NewCU->addLabel(Die, dwarf::DW_AT_GNU_pubtypes,
dwarf::DW_FORM_sec_offset,
Asm->GetTempSymbol("gnu_pubtypes",
NewCU->getUniqueID()));
else
NewCU->addDelta(Die, dwarf::DW_AT_GNU_pubtypes, dwarf::DW_FORM_data4,
Asm->GetTempSymbol("gnu_pubnames",
NewCU->getUniqueID()),
DwarfGnuPubTypesSectionSym);
}
}
if (DIUnit.isOptimized())
@@ -1967,8 +1988,10 @@ void DwarfDebug::emitSectionLabels() {
emitSectionSym(Asm, TLOF.getDwarfLineSection(), "section_line");
emitSectionSym(Asm, TLOF.getDwarfLocSection());
if (GenerateGnuPubSections) {
emitSectionSym(Asm, TLOF.getDwarfGnuPubNamesSection());
emitSectionSym(Asm, TLOF.getDwarfGnuPubTypesSection());
DwarfGnuPubNamesSectionSym =
emitSectionSym(Asm, TLOF.getDwarfGnuPubNamesSection());
DwarfGnuPubTypesSectionSym =
emitSectionSym(Asm, TLOF.getDwarfGnuPubTypesSection());
} else if (HasDwarfPubSections) {
emitSectionSym(Asm, TLOF.getDwarfPubNamesSection());
emitSectionSym(Asm, TLOF.getDwarfPubTypesSection());
@@ -2400,6 +2423,11 @@ void DwarfDebug::emitDebugPubNames(bool GnuStyle) {
// Start the dwarf pubnames section.
Asm->OutStreamer.SwitchSection(PSec);
// Emit a label so we can reference the beginning of this pubname section.
if (GnuStyle)
Asm->OutStreamer.EmitLabel(Asm->GetTempSymbol("gnu_pubnames",
TheCU->getUniqueID()));
// Emit the header.
Asm->OutStreamer.AddComment("Length of Public Names Info");
Asm->EmitLabelDifference(Asm->GetTempSymbol("pubnames_end", ID),
@@ -2460,6 +2488,13 @@ void DwarfDebug::emitDebugPubTypes(bool GnuStyle) {
CompileUnit *TheCU = I->second;
// Start the dwarf pubtypes section.
Asm->OutStreamer.SwitchSection(PSec);
// Emit a label so we can reference the beginning of this pubtype section.
if (GnuStyle)
Asm->OutStreamer.EmitLabel(Asm->GetTempSymbol("gnu_pubtypes",
TheCU->getUniqueID()));
// Emit the header.
Asm->OutStreamer.AddComment("Length of Public Types Info");
Asm->EmitLabelDifference(
Asm->GetTempSymbol("pubtypes_end", TheCU->getUniqueID()),
@@ -2482,6 +2517,7 @@ void DwarfDebug::emitDebugPubTypes(bool GnuStyle) {
Asm->GetTempSymbol(ISec->getLabelEndName(), TheCU->getUniqueID()),
Asm->GetTempSymbol(ISec->getLabelBeginName(), TheCU->getUniqueID()), 4);
// Emit the pubtypes.
const StringMap<DIE *> &Globals = TheCU->getGlobalTypes();
for (StringMap<DIE *>::const_iterator GI = Globals.begin(),
GE = Globals.end();
@@ -2929,8 +2965,23 @@ CompileUnit *DwarfDebug::constructSkeletonCU(const CompileUnit *CU) {
NewCU->addLocalString(Die, dwarf::DW_AT_comp_dir, CompilationDir);
// Flag to let the linker know we have emitted new style pubnames.
if (GenerateGnuPubSections)
NewCU->addFlag(Die, dwarf::DW_AT_GNU_pubnames);
if (GenerateGnuPubSections) {
if (Asm->MAI->doesDwarfUseRelocationsAcrossSections())
NewCU->addLabel(Die, dwarf::DW_AT_GNU_pubnames, dwarf::DW_FORM_sec_offset,
Asm->GetTempSymbol("gnu_pubnames", NewCU->getUniqueID()));
else
NewCU->addDelta(Die, dwarf::DW_AT_GNU_pubnames, dwarf::DW_FORM_data4,
Asm->GetTempSymbol("gnu_pubnames", NewCU->getUniqueID()),
DwarfGnuPubNamesSectionSym);
if (Asm->MAI->doesDwarfUseRelocationsAcrossSections())
NewCU->addLabel(Die, dwarf::DW_AT_GNU_pubtypes, dwarf::DW_FORM_sec_offset,
Asm->GetTempSymbol("gnu_pubtypes", NewCU->getUniqueID()));
else
NewCU->addDelta(Die, dwarf::DW_AT_GNU_pubtypes, dwarf::DW_FORM_data4,
Asm->GetTempSymbol("gnu_pubnames", NewCU->getUniqueID()),
DwarfGnuPubTypesSectionSym);
}
SkeletonHolder.addUnit(NewCU);
SkeletonCUs.push_back(NewCU);