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Do not hardcode DW_AT_stmt_list value.

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Inspired by Artur Pietrek.

llvm-svn: 107202
This commit is contained in:
Devang Patel 2010-06-29 20:17:53 +00:00
parent 1b4210315e
commit 8052c941ca
2 changed files with 17 additions and 7 deletions
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23
lib/CodeGen/AsmPrinter/DwarfDebug.cpp
View File

@ -321,6 +321,7 @@ DwarfDebug::DwarfDebug(AsmPrinter *A, Module *M)
DwarfFrameSectionSym = DwarfInfoSectionSym = DwarfAbbrevSectionSym = 0;
DwarfStrSectionSym = TextSectionSym = 0;
DwarfDebugRangeSectionSym = DwarfDebugLocSectionSym = 0;
DwarfDebugLineSectionSym = CurrentLineSectionSym = 0;
FunctionBeginSym = FunctionEndSym = 0;
{
NamedRegionTimer T(DbgTimerName, DWARFGroupName, TimePassesIsEnabled);
@ -1794,9 +1795,9 @@ void DwarfDebug::constructCompileUnit(const MDNode *N) {
// simplifies debug range entries.
addUInt(Die, dwarf::DW_AT_entry_pc, dwarf::DW_FORM_addr, 0);
// DW_AT_stmt_list is a offset of line number information for this
// compile unit in debug_line section. It is always zero when only one
// compile unit is emitted in one object file.
addUInt(Die, dwarf::DW_AT_stmt_list, dwarf::DW_FORM_data4, 0);
// compile unit in debug_line section. This offset is calculated
// during endMoudle().
addLabel(Die, dwarf::DW_AT_stmt_list, dwarf::DW_FORM_data4, 0);
if (!Dir.empty())
addString(Die, dwarf::DW_AT_comp_dir, dwarf::DW_FORM_string, Dir);
@ -2081,15 +2082,15 @@ void DwarfDebug::endModule() {
// Compute DIE offsets and sizes.
computeSizeAndOffsets();
// Emit source line correspondence into a debug line section.
emitDebugLines();
// Emit all the DIEs into a debug info section
emitDebugInfo();
// Corresponding abbreviations into a abbrev section.
emitAbbreviations();
// Emit source line correspondence into a debug line section.
emitDebugLines();
// Emit info into a debug pubnames section.
emitDebugPubNames();
@ -2992,7 +2993,8 @@ void DwarfDebug::EmitSectionLabels() {
if (const MCSection *MacroInfo = TLOF.getDwarfMacroInfoSection())
EmitSectionSym(Asm, MacroInfo);
EmitSectionSym(Asm, TLOF.getDwarfLineSection());
DwarfDebugLineSectionSym =
EmitSectionSym(Asm, TLOF.getDwarfLineSection(), "section_line");
EmitSectionSym(Asm, TLOF.getDwarfLocSection());
EmitSectionSym(Asm, TLOF.getDwarfPubNamesSection());
EmitSectionSym(Asm, TLOF.getDwarfPubTypesSection());
@ -3055,6 +3057,11 @@ void DwarfDebug::emitDIE(DIE *Die) {
4);
break;
}
case dwarf::DW_AT_stmt_list: {
Asm->EmitLabelDifference(CurrentLineSectionSym,
DwarfDebugLineSectionSym, 4);
break;
}
case dwarf::DW_AT_location: {
if (UseDotDebugLocEntry.count(Die) != 0) {
DIELabel *L = cast<DIELabel>(Values[i]);
@ -3200,6 +3207,8 @@ void DwarfDebug::emitDebugLines() {
Asm->getObjFileLowering().getDwarfLineSection());
// Construct the section header.
CurrentLineSectionSym = Asm->GetTempSymbol("section_line_begin");
Asm->OutStreamer.EmitLabel(CurrentLineSectionSym);
Asm->OutStreamer.AddComment("Length of Source Line Info");
Asm->EmitLabelDifference(Asm->GetTempSymbol("line_end"),
Asm->GetTempSymbol("line_begin"), 4);

1
lib/CodeGen/AsmPrinter/DwarfDebug.h
View File

@ -258,6 +258,7 @@ class DwarfDebug {
MCSymbol *DwarfFrameSectionSym, *DwarfInfoSectionSym, *DwarfAbbrevSectionSym;
MCSymbol *DwarfStrSectionSym, *TextSectionSym, *DwarfDebugRangeSectionSym;
MCSymbol *DwarfDebugLocSectionSym;
MCSymbol *DwarfDebugLineSectionSym, *CurrentLineSectionSym;
MCSymbol *FunctionBeginSym, *FunctionEndSym;
private: