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Add support to emit dwarf ranges.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101575 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Devang Patel
2010-04-16 23:33:45 +00:00
parent cf7fbd41be
commit f2548caaa8
5 changed files with 65 additions and 5 deletions
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26
lib/CodeGen/AsmPrinter/DwarfDebug.cpp
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@ -302,7 +302,7 @@ DbgScope::~DbgScope() {
DwarfDebug::DwarfDebug(AsmPrinter *A, Module *M)
: Asm(A), MMI(Asm->MMI), ModuleCU(0),
AbbreviationsSet(InitAbbreviationsSetSize),
CurrentFnDbgScope(0) {
CurrentFnDbgScope(0), PrevLabel(NULL) {
NextStringPoolNumber = 0;
DwarfFrameSectionSym = DwarfInfoSectionSym = DwarfAbbrevSectionSym = 0;
@ -2354,6 +2354,7 @@ void DwarfDebug::endFunction(const MachineFunction *MF) {
InsnBeforeLabelMap.clear();
InsnAfterLabelMap.clear();
Lines.clear();
PrevLabel = NULL;
}
/// recordSourceLine - Register a source line with debug info. Returns the
@ -2490,7 +2491,8 @@ void DwarfDebug::EmitSectionLabels() {
EmitSectionSym(Asm, TLOF.getDwarfPubTypesSection());
DwarfStrSectionSym =
EmitSectionSym(Asm, TLOF.getDwarfStrSection(), "section_str");
EmitSectionSym(Asm, TLOF.getDwarfRangesSection());
DwarfDebugRangeSectionSym = EmitSectionSym(Asm, TLOF.getDwarfRangesSection(),
"debug_range");
TextSectionSym = EmitSectionSym(Asm, TLOF.getTextSection(), "text_begin");
EmitSectionSym(Asm, TLOF.getDataSection());
@ -2534,6 +2536,15 @@ void DwarfDebug::emitDIE(DIE *Die) {
Asm->EmitInt32(Addr);
break;
}
case dwarf::DW_AT_ranges: {
// DW_AT_range Value encodes offset in debug_range section.
DIEInteger *V = cast<DIEInteger>(Values[i]);
Asm->EmitLabelOffsetDifference(DwarfDebugRangeSectionSym,
V->getValue(),
DwarfDebugRangeSectionSym,
4);
break;
}
default:
// Emit an attribute using the defined form.
Values[i]->EmitValue(Asm, Form);
@ -3055,7 +3066,16 @@ void DwarfDebug::EmitDebugARanges() {
void DwarfDebug::emitDebugRanges() {
// Start the dwarf ranges section.
Asm->OutStreamer.SwitchSection(
Asm->getObjFileLowering().getDwarfRangesSection());
Asm->getObjFileLowering().getDwarfRangesSection());
for (SmallVector<const MCSymbol *, 8>::const_iterator I = DebugRangeSymbols.begin(),
E = DebugRangeSymbols.end(); I != E; ++I) {
if (*I)
Asm->EmitLabelDifference(*I, TextSectionSym,
Asm->getTargetData().getPointerSize());
else
Asm->OutStreamer.EmitIntValue(0, Asm->getTargetData().getPointerSize(),
/*addrspace*/0);
}
}
/// emitDebugMacInfo - Emit visible names into a debug macinfo section.