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Add support for fetching inlining context (stack of source code locations)

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by instruction address from DWARF.

Add --inlining flag to llvm-dwarfdump to demonstrate and test this functionality,
so that "llvm-dwarfdump --inlining --address=0x..." now works much like
"addr2line -i 0x...", provided that the binary has debug info
(Clang's -gline-tables-only *is* enough).


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@163128 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Alexey Samsonov
2012-09-04 08:12:33 +00:00
parent 2d5c28da0d
commit 5eae90d727
12 changed files with 359 additions and 88 deletions
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28
lib/DebugInfo/DWARFCompileUnit.cpp
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@ -75,6 +75,15 @@ DWARFCompileUnit::extract(uint32_t offset, DataExtractor debug_info_data,
return 0;
}
bool DWARFCompileUnit::extractRangeList(uint32_t RangeListOffset,
DWARFDebugRangeList &RangeList) const {
// Require that compile unit is extracted.
assert(DieArray.size() > 0);
DataExtractor RangesData(Context.getRangeSection(),
Context.isLittleEndian(), AddrSize);
return RangeList.extract(RangesData, &RangeListOffset);
}
void DWARFCompileUnit::clear() {
Offset = 0;
Length = 0;
@ -246,12 +255,21 @@ DWARFCompileUnit::buildAddressRangeTable(DWARFDebugAranges *debug_aranges,
clearDIEs(true);
}
const DWARFDebugInfoEntryMinimal*
DWARFCompileUnit::getFunctionDIEForAddress(int64_t address) {
DWARFDebugInfoEntryMinimal::InlinedChain
DWARFCompileUnit::getInlinedChainForAddress(uint64_t Address) {
// First, find a subprogram that contains the given address (the root
// of inlined chain).
extractDIEsIfNeeded(false);
const DWARFDebugInfoEntryMinimal *SubprogramDIE = 0;
for (size_t i = 0, n = DieArray.size(); i != n; i++) {
if (DieArray[i].addressRangeContainsAddress(this, address))
return &DieArray[i];
if (DieArray[i].isSubprogramDIE() &&
DieArray[i].addressRangeContainsAddress(this, Address)) {
SubprogramDIE = &DieArray[i];
break;
}
}
return 0;
// Get inlined chain rooted at this subprogram DIE.
if (!SubprogramDIE)
return DWARFDebugInfoEntryMinimal::InlinedChain();
return SubprogramDIE->getInlinedChainForAddress(this, Address);
}