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Turn on pubnames by default on linux.

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Until gdb supports the new accelerator tables we should add the
pubnames section so that gdb_index can be generated from gold
at link time. On darwin we already emit the accelerator tables
and so don't need to worry about pubnames.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@188708 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Eric Christopher
2013-08-19 21:07:38 +00:00
parent f1070a0b86
commit f04e4efcaa
4 changed files with 153 additions and 11 deletions
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31
lib/CodeGen/AsmPrinter/DwarfDebug.cpp
View File

@@ -57,11 +57,6 @@ static cl::opt<bool> UnknownLocations(
cl::desc("Make an absence of debug location information explicit."),
cl::init(false));
static cl::opt<bool>
GenerateDwarfPubNamesSection("generate-dwarf-pubnames", cl::Hidden,
cl::init(false),
cl::desc("Generate DWARF pubnames section"));
static cl::opt<bool>
GenerateODRHash("generate-odr-hash", cl::Hidden,
cl::desc("Add an ODR hash to external type DIEs."),
@@ -104,6 +99,14 @@ SplitDwarf("split-dwarf", cl::Hidden,
clEnumVal(Disable, "Disabled"), clEnumValEnd),
cl::init(Default));
static cl::opt<DefaultOnOff>
DwarfPubNames("generate-dwarf-pubnames", cl::Hidden,
cl::desc("Generate DWARF pubnames section"),
cl::values(clEnumVal(Default, "Default for platform"),
clEnumVal(Enable, "Enabled"),
clEnumVal(Disable, "Disabled"), clEnumValEnd),
cl::init(Default));
namespace {
const char *const DWARFGroupName = "DWARF Emission";
const char *const DbgTimerName = "DWARF Debug Writer";
@@ -225,6 +228,14 @@ DwarfDebug::DwarfDebug(AsmPrinter *A, Module *M)
else
HasSplitDwarf = SplitDwarf == Enable ? true : false;
if (DwarfPubNames == Default) {
if (IsDarwin)
HasDwarfPubNames = false;
else
HasDwarfPubNames = true;
} else
HasDwarfPubNames = DwarfPubNames == Enable ? true : false;
DwarfVersion = getDwarfVersionFromModule(MMI->getModule());
{
@@ -797,7 +808,7 @@ void DwarfDebug::constructSubprogramDIE(CompileUnit *TheCU,
TheCU->addToContextOwner(SubprogramDie, SP.getContext());
// Expose as global, if requested.
if (GenerateDwarfPubNamesSection)
if (HasDwarfPubNames)
TheCU->addGlobalName(SP.getName(), SubprogramDie);
}
@@ -1146,7 +1157,7 @@ void DwarfDebug::endModule() {
}
// Emit info into a debug pubnames section, if requested.
if (GenerateDwarfPubNamesSection)
if (HasDwarfPubNames)
emitDebugPubnames();
// Emit info into a debug pubtypes section.
@@ -1932,7 +1943,7 @@ void DwarfDebug::emitSectionLabels() {
DwarfLineSectionSym =
emitSectionSym(Asm, TLOF.getDwarfLineSection(), "section_line");
emitSectionSym(Asm, TLOF.getDwarfLocSection());
if (GenerateDwarfPubNamesSection)
if (HasDwarfPubNames)
emitSectionSym(Asm, TLOF.getDwarfPubNamesSection());
emitSectionSym(Asm, TLOF.getDwarfPubTypesSection());
DwarfStrSectionSym =
@@ -2307,8 +2318,8 @@ void DwarfDebug::emitDebugPubnames() {
continue;
// Start the dwarf pubnames section.
Asm->OutStreamer.SwitchSection(
Asm->getObjFileLowering().getDwarfPubNamesSection());
Asm->OutStreamer
.SwitchSection(Asm->getObjFileLowering().getDwarfPubNamesSection());
Asm->OutStreamer.AddComment("Length of Public Names Info");
Asm->EmitLabelDifference(Asm->GetTempSymbol("pubnames_end", ID),