forked from OSchip/llvm-project
Make sure we emit a relocation to the debug_ranges section in the
presence of CU ranges. llvm-svn: 199276
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e9fab9b077
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1ad8457570
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@ -209,6 +209,10 @@ DwarfDebug::DwarfDebug(AsmPrinter *A, Module *M)
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else
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else
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HasDwarfPubSections = DwarfPubSections == Enable;
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HasDwarfPubSections = DwarfPubSections == Enable;
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// For now only turn on CU ranges if we've explicitly asked for it
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// or we have -ffunction-sections enabled.
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HasCURanges = DwarfCURanges || TargetMachine::getFunctionSections();
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DwarfVersion = DwarfVersionNumber
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DwarfVersion = DwarfVersionNumber
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? DwarfVersionNumber
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? DwarfVersionNumber
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: getDwarfVersionFromModule(MMI->getModule());
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: getDwarfVersionFromModule(MMI->getModule());
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@ -1057,8 +1061,7 @@ void DwarfDebug::finalizeModuleInfo() {
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// FIXME: We should use ranges if we have multiple compile units or
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// FIXME: We should use ranges if we have multiple compile units or
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// allow reordering of code ala .subsections_via_symbols in mach-o.
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// allow reordering of code ala .subsections_via_symbols in mach-o.
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DwarfCompileUnit *U = SkCU ? SkCU : static_cast<DwarfCompileUnit *>(TheU);
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DwarfCompileUnit *U = SkCU ? SkCU : static_cast<DwarfCompileUnit *>(TheU);
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if ((DwarfCURanges || TargetMachine::getFunctionSections()) &&
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if (useCURanges() && TheU->getRanges().size())
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TheU->getRanges().size())
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addSectionLabel(Asm, U, U->getUnitDie(), dwarf::DW_AT_ranges,
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addSectionLabel(Asm, U, U->getUnitDie(), dwarf::DW_AT_ranges,
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Asm->GetTempSymbol("cu_ranges", U->getUniqueID()),
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Asm->GetTempSymbol("cu_ranges", U->getUniqueID()),
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DwarfDebugRangeSectionSym);
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DwarfDebugRangeSectionSym);
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@ -2910,7 +2913,7 @@ void DwarfDebug::emitDebugRanges() {
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}
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}
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// Now emit a range for the CU itself.
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// Now emit a range for the CU itself.
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if (DwarfCURanges) {
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if (useCURanges()) {
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Asm->OutStreamer.EmitLabel(
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Asm->OutStreamer.EmitLabel(
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Asm->GetTempSymbol("cu_ranges", TheCU->getUniqueID()));
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Asm->GetTempSymbol("cu_ranges", TheCU->getUniqueID()));
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const SmallVectorImpl<RangeSpan> &Ranges = TheCU->getRanges();
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const SmallVectorImpl<RangeSpan> &Ranges = TheCU->getRanges();
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@ -458,6 +458,9 @@ class DwarfDebug : public AsmPrinterHandler {
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// Whether to emit the pubnames/pubtypes sections.
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// Whether to emit the pubnames/pubtypes sections.
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bool HasDwarfPubSections;
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bool HasDwarfPubSections;
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// Whether or not to use AT_ranges for compilation units.
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bool HasCURanges;
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// Version of dwarf we're emitting.
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// Version of dwarf we're emitting.
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unsigned DwarfVersion;
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unsigned DwarfVersion;
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@ -733,6 +736,9 @@ public:
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/// split dwarf proposal support.
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/// split dwarf proposal support.
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bool useSplitDwarf() { return HasSplitDwarf; }
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bool useSplitDwarf() { return HasSplitDwarf; }
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/// \brief Returns whether or not to use AT_ranges for compilation units.
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bool useCURanges() { return HasCURanges; }
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/// Returns the Dwarf Version.
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/// Returns the Dwarf Version.
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unsigned getDwarfVersion() const { return DwarfVersion; }
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unsigned getDwarfVersion() const { return DwarfVersion; }
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@ -1,5 +1,6 @@
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; RUN: llc -split-dwarf=Enable -O0 %s -ffunction-sections -mtriple=x86_64-unknown-linux-gnu -filetype=obj -o %t
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; RUN: llc -split-dwarf=Enable -O0 %s -ffunction-sections -mtriple=x86_64-unknown-linux-gnu -filetype=obj -o %t
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; RUN: llvm-dwarfdump -debug-dump=all %t | FileCheck --check-prefix=FUNCTION-SECTIONS %s
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; RUN: llvm-dwarfdump -debug-dump=all %t | FileCheck --check-prefix=FUNCTION-SECTIONS %s
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; RUN: llvm-readobj --relocations %t | FileCheck --check-prefix=FUNCTION-SECTIONS-RELOCS %s
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; RUN: llc -split-dwarf=Enable -O0 %s -mtriple=x86_64-unknown-linux-gnu -filetype=obj -o %t
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; RUN: llc -split-dwarf=Enable -O0 %s -mtriple=x86_64-unknown-linux-gnu -filetype=obj -o %t
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; RUN: llvm-dwarfdump -debug-dump=all %t | FileCheck --check-prefix=NO-FUNCTION-SECTIONS %s
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; RUN: llvm-dwarfdump -debug-dump=all %t | FileCheck --check-prefix=NO-FUNCTION-SECTIONS %s
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@ -12,6 +13,9 @@
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; With function sections enabled make sure that we have a DW_AT_ranges attribute.
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; With function sections enabled make sure that we have a DW_AT_ranges attribute.
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; FUNCTION-SECTIONS: DW_AT_ranges
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; FUNCTION-SECTIONS: DW_AT_ranges
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; Check that we have a relocation against the .debug_ranges section.
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; FUNCTION-SECTIONS-RELOCS: R_X86_64_32 .debug_ranges 0x0
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; Without function sections enabled make sure that we have no DW_AT_ranges attribute.
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; Without function sections enabled make sure that we have no DW_AT_ranges attribute.
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; NO-FUNCTION-SECTIONS-NOT: DW_AT_ranges
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; NO-FUNCTION-SECTIONS-NOT: DW_AT_ranges
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