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Fix aranges and split dwarf by ensuring that the symbol and relocation

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back to the compile unit from the aranges section is to the skeleton
unit and not the one in the dwo.

Do this by adding a method to grab a forwarded on local sym and local
section by querying the skeleton if one exists and using that. Add
a few tests to verify the relocations are back to the correct section.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@198202 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Eric Christopher
2013-12-30 05:25:49 +00:00
parent 8e58e03822
commit 782b70f4b3
5 changed files with 31 additions and 7 deletions
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11
lib/CodeGen/AsmPrinter/DwarfDebug.cpp
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@@ -825,11 +825,7 @@ DwarfCompileUnit *DwarfDebug::constructDwarfCompileUnit(DICompileUnit DIUnit) {
NewCU->initSection(
useSplitDwarf() ? Asm->getObjFileLowering().getDwarfInfoDWOSection()
: Asm->getObjFileLowering().getDwarfInfoSection(),
// FIXME: This is subtle (using the info section even when
// this CU is in the dwo section) and necessary for the
// current arange code - ideally it should iterate
// skeleton units, not full units, if it's going to reference skeletons
DwarfInfoSectionSym);
useSplitDwarf() ? DwarfInfoDWOSectionSym : DwarfInfoSectionSym);
// If we're splitting the dwarf then construct the skeleton CU now.
if (useSplitDwarf())
@@ -2010,6 +2006,9 @@ void DwarfDebug::emitSectionLabels() {
// Dwarf sections base addresses.
DwarfInfoSectionSym =
emitSectionSym(Asm, TLOF.getDwarfInfoSection(), "section_info");
if (useSplitDwarf())
DwarfInfoDWOSectionSym =
emitSectionSym(Asm, TLOF.getDwarfInfoDWOSection(), "section_info_dwo");
DwarfAbbrevSectionSym =
emitSectionSym(Asm, TLOF.getDwarfAbbrevSection(), "section_abbrev");
if (useSplitDwarf())
@@ -2875,7 +2874,7 @@ 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->getLocalLabelBegin(), CU->getLocalSectionSym());
Asm->OutStreamer.AddComment("Address Size (in bytes)");
Asm->EmitInt8(PtrSize);
Asm->OutStreamer.AddComment("Segment Size (in bytes)");