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DebugInfo: Streamline debug_ranges/rnglists/rnglists.dwo emission code 

More code reuse, better basis for modelling
debug_loc/loclists/loclists.dwo emission support.
This commit is contained in:
David Blaikie 2019-11-01 14:50:12 -07:00
parent 42465f406b
commit 89b7f16204
2 changed files with 23 additions and 47 deletions
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69
llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
View File

@ -2655,10 +2655,23 @@ static void emitRangeList(DwarfDebug &DD, AsmPrinter *Asm,
[](auto) {});
}
static void emitDebugRangesImpl(DwarfDebug &DD, AsmPrinter *Asm,
const DwarfFile &Holder, MCSymbol *TableEnd) {
void DwarfDebug::emitDebugRangesImpl(const DwarfFile &Holder, MCSection *Section) {
if (Holder.getRangeLists().empty())
return;
assert(useRangesSection());
assert(!CUMap.empty());
assert(llvm::any_of(CUMap, [](const decltype(CUMap)::value_type &Pair) {
return !Pair.second->getCUNode()->isDebugDirectivesOnly();
}));
Asm->OutStreamer->SwitchSection(Section);
MCSymbol *TableEnd =
getDwarfVersion() < 5 ? nullptr : emitRnglistsTableHeader(Asm, Holder);
for (const RangeSpanList &List : Holder.getRangeLists())
emitRangeList(DD, Asm, List);
emitRangeList(*this, Asm, List);
if (TableEnd)
Asm->OutStreamer->EmitLabel(TableEnd);
@ -2667,55 +2680,17 @@ static void emitDebugRangesImpl(DwarfDebug &DD, AsmPrinter *Asm,
/// Emit address ranges into the .debug_ranges section or into the DWARF v5
/// .debug_rnglists section.
void DwarfDebug::emitDebugRanges() {
if (CUMap.empty())
return;
const auto &Holder = useSplitDwarf() ? SkeletonHolder : InfoHolder;
if (Holder.getRangeLists().empty())
return;
assert(useRangesSection());
assert(llvm::none_of(CUMap, [](const decltype(CUMap)::value_type &Pair) {
return Pair.second->getCUNode()->isDebugDirectivesOnly();
}));
// Start the dwarf ranges section.
MCSymbol *TableEnd = nullptr;
if (getDwarfVersion() >= 5) {
Asm->OutStreamer->SwitchSection(
Asm->getObjFileLowering().getDwarfRnglistsSection());
TableEnd = emitRnglistsTableHeader(Asm, Holder);
} else
Asm->OutStreamer->SwitchSection(
Asm->getObjFileLowering().getDwarfRangesSection());
emitDebugRangesImpl(*this, Asm, Holder, TableEnd);
emitDebugRangesImpl(Holder,
getDwarfVersion() >= 5
? Asm->getObjFileLowering().getDwarfRnglistsSection()
: Asm->getObjFileLowering().getDwarfRangesSection());
}
void DwarfDebug::emitDebugRangesDWO() {
assert(useSplitDwarf());
if (CUMap.empty())
return;
const auto &Holder = InfoHolder;
if (Holder.getRangeLists().empty())
return;
assert(getDwarfVersion() >= 5);
assert(useRangesSection());
assert(llvm::none_of(CUMap, [](const decltype(CUMap)::value_type &Pair) {
return Pair.second->getCUNode()->isDebugDirectivesOnly();
}));
// Start the dwarf ranges section.
Asm->OutStreamer->SwitchSection(
Asm->getObjFileLowering().getDwarfRnglistsDWOSection());
MCSymbol *TableEnd = emitRnglistsTableHeader(Asm, Holder);
emitDebugRangesImpl(*this, Asm, Holder, TableEnd);
emitDebugRangesImpl(InfoHolder,
Asm->getObjFileLowering().getDwarfRnglistsDWOSection());
}
void DwarfDebug::handleMacroNodes(DIMacroNodeArray Nodes, DwarfCompileUnit &U) {

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

@ -504,6 +504,7 @@ class DwarfDebug : public DebugHandlerBase {
/// Emit address ranges into a debug ranges section.
void emitDebugRanges();
void emitDebugRangesDWO();
void emitDebugRangesImpl(const DwarfFile &Holder, MCSection *Section);
/// Emit macros into a debug macinfo section.
void emitDebugMacinfo();