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Diffstat (limited to 'llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp')
-rw-r--r--llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp107
1 files changed, 46 insertions, 61 deletions
diff --git a/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp b/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
index f696364cc73..24e26f90212 100644
--- a/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
+++ b/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
@@ -202,11 +202,6 @@ DwarfDebug::DwarfDebug(AsmPrinter *A, Module *M)
dwarf::DW_FORM_data4)),
AccelTypes(TypeAtoms) {
- DwarfInfoSectionSym = DwarfAbbrevSectionSym = DwarfStrSectionSym = nullptr;
- DwarfDebugRangeSectionSym = DwarfDebugLocSectionSym = nullptr;
- DwarfLineSectionSym = nullptr;
- DwarfAddrSectionSym = nullptr;
- DwarfAbbrevDWOSectionSym = DwarfStrDWOSectionSym = nullptr;
CurFn = nullptr;
CurMI = nullptr;
@@ -248,12 +243,12 @@ DwarfDebug::~DwarfDebug() { }
// Switch to the specified MCSection and emit an assembler
// temporary label to it if SymbolStem is specified.
-static MCSymbol *emitSectionSym(AsmPrinter *Asm, const MCSection *Section,
- const char *SymbolStem) {
+static void emitSectionSym(AsmPrinter *Asm, const MCSection *Section,
+ StringRef SymbolStem) {
Asm->OutStreamer.SwitchSection(Section);
MCSymbol *TmpSym = Asm->GetTempSymbol(SymbolStem);
Asm->OutStreamer.EmitLabel(TmpSym);
- return TmpSym;
+ Section->setBeginSymbol(*TmpSym);
}
static bool isObjCClass(StringRef Name) {
@@ -401,7 +396,7 @@ DwarfCompileUnit &DwarfDebug::constructDwarfCompileUnit(DICompileUnit DIUnit) {
NewCU.addString(Die, dwarf::DW_AT_name, FN);
if (!useSplitDwarf()) {
- NewCU.initStmtList(DwarfLineSectionSym);
+ NewCU.initStmtList();
// If we're using split dwarf the compilation dir is going to be in the
// skeleton CU and so we don't need to duplicate it here.
@@ -423,11 +418,9 @@ DwarfCompileUnit &DwarfDebug::constructDwarfCompileUnit(DICompileUnit DIUnit) {
dwarf::DW_FORM_data1, RVer);
if (useSplitDwarf())
- NewCU.initSection(Asm->getObjFileLowering().getDwarfInfoDWOSection(),
- DwarfInfoDWOSectionSym);
+ NewCU.initSection(Asm->getObjFileLowering().getDwarfInfoDWOSection());
else
- NewCU.initSection(Asm->getObjFileLowering().getDwarfInfoSection(),
- DwarfInfoSectionSym);
+ NewCU.initSection(Asm->getObjFileLowering().getDwarfInfoSection());
CUMap.insert(std::make_pair(DIUnit, &NewCU));
CUDieMap.insert(std::make_pair(&Die, &NewCU));
@@ -557,6 +550,8 @@ void DwarfDebug::collectDeadVariables() {
}
void DwarfDebug::finalizeModuleInfo() {
+ const TargetLoweringObjectFile &TLOF = Asm->getObjFileLowering();
+
finishSubprogramDefinitions();
finishVariableDefinitions();
@@ -586,13 +581,16 @@ void DwarfDebug::finalizeModuleInfo() {
// We don't keep track of which addresses are used in which CU so this
// is a bit pessimistic under LTO.
- if (!AddrPool.isEmpty())
+ if (!AddrPool.isEmpty()) {
+ const MCSymbol *Sym = TLOF.getDwarfAddrSection()->getBeginSymbol();
SkCU->addSectionLabel(SkCU->getUnitDie(), dwarf::DW_AT_GNU_addr_base,
- DwarfAddrSectionSym, DwarfAddrSectionSym);
- if (!SkCU->getRangeLists().empty())
+ Sym, Sym);
+ }
+ if (!SkCU->getRangeLists().empty()) {
+ const MCSymbol *Sym = TLOF.getDwarfRangesSection()->getBeginSymbol();
SkCU->addSectionLabel(SkCU->getUnitDie(), dwarf::DW_AT_GNU_ranges_base,
- DwarfDebugRangeSectionSym,
- DwarfDebugRangeSectionSym);
+ Sym, Sym);
+ }
}
// If we have code split among multiple sections or non-contiguous
@@ -623,13 +621,14 @@ void DwarfDebug::finalizeModuleInfo() {
// Emit all Dwarf sections that should come after the content.
void DwarfDebug::endModule() {
+ const TargetLoweringObjectFile &TLOF = Asm->getObjFileLowering();
assert(CurFn == nullptr);
assert(CurMI == nullptr);
// If we aren't actually generating debug info (check beginModule -
// conditionalized on !DisableDebugInfoPrinting and the presence of the
// llvm.dbg.cu metadata node)
- if (!DwarfInfoSectionSym)
+ if (!TLOF.getDwarfInfoSection()->getBeginSymbol())
return;
// Finalize the debug info for the module.
@@ -637,6 +636,12 @@ void DwarfDebug::endModule() {
emitDebugStr();
+ if (useSplitDwarf())
+ emitDebugLocDWO();
+ else
+ // Emit info into a debug loc section.
+ emitDebugLoc();
+
// Emit all the DIEs into a debug info section.
emitDebugInfo();
@@ -655,12 +660,9 @@ void DwarfDebug::endModule() {
emitDebugInfoDWO();
emitDebugAbbrevDWO();
emitDebugLineDWO();
- emitDebugLocDWO();
// Emit DWO addresses.
AddrPool.emit(*Asm, Asm->getObjFileLowering().getDwarfAddrSection());
- } else
- // Emit info into a debug loc section.
- emitDebugLoc();
+ }
// Emit info into the dwarf accelerator table sections.
if (useDwarfAccelTables()) {
@@ -1304,43 +1306,30 @@ void DwarfDebug::emitSectionLabels() {
const TargetLoweringObjectFile &TLOF = Asm->getObjFileLowering();
// Dwarf sections base addresses.
- DwarfInfoSectionSym =
- emitSectionSym(Asm, TLOF.getDwarfInfoSection(), "section_info");
+ emitSectionSym(Asm, TLOF.getDwarfInfoSection(), "section_info");
if (useSplitDwarf()) {
- DwarfInfoDWOSectionSym =
- emitSectionSym(Asm, TLOF.getDwarfInfoDWOSection(), "section_info_dwo");
- DwarfTypesDWOSectionSym = emitSectionSym(
- Asm, TLOF.getDwarfTypesDWOSection(), "section_types_dwo");
+ emitSectionSym(Asm, TLOF.getDwarfInfoDWOSection(), "section_info_dwo");
+ emitSectionSym(Asm, TLOF.getDwarfTypesDWOSection(), "section_types_dwo");
}
- DwarfAbbrevSectionSym =
- emitSectionSym(Asm, TLOF.getDwarfAbbrevSection(), "section_abbrev");
+ emitSectionSym(Asm, TLOF.getDwarfAbbrevSection(), "section_abbrev");
if (useSplitDwarf())
- DwarfAbbrevDWOSectionSym = emitSectionSym(
- Asm, TLOF.getDwarfAbbrevDWOSection(), "section_abbrev_dwo");
+ emitSectionSym(Asm, TLOF.getDwarfAbbrevDWOSection(), "section_abbrev_dwo");
- DwarfLineSectionSym =
- emitSectionSym(Asm, TLOF.getDwarfLineSection(), "section_line");
- DwarfStrSectionSym =
- emitSectionSym(Asm, TLOF.getDwarfStrSection(), "info_string");
+ emitSectionSym(Asm, TLOF.getDwarfLineSection(), "section_line");
+ emitSectionSym(Asm, TLOF.getDwarfStrSection(), "info_string");
if (useSplitDwarf()) {
- DwarfStrDWOSectionSym =
- emitSectionSym(Asm, TLOF.getDwarfStrDWOSection(), "skel_string");
- DwarfAddrSectionSym =
- emitSectionSym(Asm, TLOF.getDwarfAddrSection(), "addr_sec");
- DwarfDebugLocSectionSym =
- emitSectionSym(Asm, TLOF.getDwarfLocDWOSection(), "skel_loc");
+ emitSectionSym(Asm, TLOF.getDwarfStrDWOSection(), "skel_string");
+ emitSectionSym(Asm, TLOF.getDwarfAddrSection(), "addr_sec");
+ emitSectionSym(Asm, TLOF.getDwarfLocDWOSection(), "skel_loc");
} else
- DwarfDebugLocSectionSym =
- emitSectionSym(Asm, TLOF.getDwarfLocSection(), "section_debug_loc");
- DwarfDebugRangeSectionSym =
- emitSectionSym(Asm, TLOF.getDwarfRangesSection(), "debug_range");
+ emitSectionSym(Asm, TLOF.getDwarfLocSection(), "section_debug_loc");
+ emitSectionSym(Asm, TLOF.getDwarfRangesSection(), "debug_range");
}
// Emit the debug info section.
void DwarfDebug::emitDebugInfo() {
DwarfFile &Holder = useSplitDwarf() ? SkeletonHolder : InfoHolder;
-
- Holder.emitUnits(DwarfAbbrevSectionSym);
+ Holder.emitUnits(/* UseOffsets */ false);
}
// Emit the abbreviation section.
@@ -1377,12 +1366,10 @@ void DwarfDebug::emitEndOfLineMatrix(unsigned SectionEnd) {
void DwarfDebug::emitAccel(DwarfAccelTable &Accel, const MCSection *Section,
StringRef TableName, StringRef SymName) {
Accel.FinalizeTable(Asm, TableName);
- Asm->OutStreamer.SwitchSection(Section);
- auto *SectionBegin = Asm->GetTempSymbol(SymName);
- Asm->OutStreamer.EmitLabel(SectionBegin);
+ emitSectionSym(Asm, Section, SymName);
// Emit the full data.
- Accel.Emit(Asm, SectionBegin, this, DwarfStrSectionSym);
+ Accel.emit(Asm, Section->getBeginSymbol(), this);
}
// Emit visible names into a hashed accelerator table section.
@@ -1508,7 +1495,7 @@ void DwarfDebug::emitDebugPubSection(
Asm->EmitInt16(dwarf::DW_PUBNAMES_VERSION);
Asm->OutStreamer.AddComment("Offset of Compilation Unit Info");
- Asm->EmitSectionOffset(TheU->getLabelBegin(), TheU->getSectionSym());
+ Asm->emitSectionOffset(TheU->getLabelBegin());
Asm->OutStreamer.AddComment("Compilation Unit Length");
Asm->EmitInt32(TheU->getLength());
@@ -1856,7 +1843,7 @@ void DwarfDebug::emitDebugARanges() {
Asm->OutStreamer.AddComment("DWARF Arange version number");
Asm->EmitInt16(dwarf::DW_ARANGES_VERSION);
Asm->OutStreamer.AddComment("Offset Into Debug Info Section");
- Asm->EmitSectionOffset(CU->getLabelBegin(), CU->getSectionSym());
+ Asm->emitSectionOffset(CU->getLabelBegin());
Asm->OutStreamer.AddComment("Address Size (in bytes)");
Asm->EmitInt8(PtrSize);
Asm->OutStreamer.AddComment("Segment Size (in bytes)");
@@ -1952,10 +1939,9 @@ DwarfCompileUnit &DwarfDebug::constructSkeletonCU(const DwarfCompileUnit &CU) {
auto OwnedUnit = make_unique<DwarfCompileUnit>(
CU.getUniqueID(), CU.getCUNode(), Asm, this, &SkeletonHolder);
DwarfCompileUnit &NewCU = *OwnedUnit;
- NewCU.initSection(Asm->getObjFileLowering().getDwarfInfoSection(),
- DwarfInfoSectionSym);
+ NewCU.initSection(Asm->getObjFileLowering().getDwarfInfoSection());
- NewCU.initStmtList(DwarfLineSectionSym);
+ NewCU.initStmtList();
initSkeletonUnit(CU, NewCU.getUnitDie(), std::move(OwnedUnit));
@@ -1966,9 +1952,8 @@ DwarfCompileUnit &DwarfDebug::constructSkeletonCU(const DwarfCompileUnit &CU) {
// compile units that would normally be in debug_info.
void DwarfDebug::emitDebugInfoDWO() {
assert(useSplitDwarf() && "No split dwarf debug info?");
- // Don't pass an abbrev symbol, using a constant zero instead so as not to
- // emit relocations into the dwo file.
- InfoHolder.emitUnits(/* AbbrevSymbol */ nullptr);
+ // Don't emit relocations into the dwo file.
+ InfoHolder.emitUnits(/* UseOffsets */ true);
}
// Emit the .debug_abbrev.dwo section for separated dwarf. This contains the
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