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DWARF parser: since DWARF4, DW_AT_high_pc may be a constant representing function size

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@193555 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Alexey Samsonov 2013-10-28 23:15:15 +00:00
parent c5253237f8
commit d2d54e2b7c
1 changed files with 10 additions and 4 deletions
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14
lib/DebugInfo/DWARFDebugInfoEntry.cpp
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@ -258,11 +258,17 @@ uint64_t DWARFDebugInfoEntryMinimal::getAttributeValueAsSectionOffset(
bool DWARFDebugInfoEntryMinimal::getLowAndHighPC(const DWARFUnit *U,
uint64_t &LowPC,
uint64_t &HighPC) const {
HighPC = -1ULL;
LowPC = getAttributeValueAsAddress(U, DW_AT_low_pc, -1ULL);
// FIXME: Check if HighPC is of class constant (it has different semantics).
if (LowPC != -1ULL)
HighPC = getAttributeValueAsAddress(U, DW_AT_high_pc, -1ULL);
if (LowPC == -1ULL)
return false;
HighPC = getAttributeValueAsAddress(U, DW_AT_high_pc, -1ULL);
if (HighPC == -1ULL) {
// Since DWARF4, DW_AT_high_pc may also be of class constant, in which case
// it represents function size.
HighPC = getAttributeValueAsUnsignedConstant(U, DW_AT_high_pc, -1ULL);
if (HighPC != -1ULL)
HighPC += LowPC;
}
return (HighPC != -1ULL);
}