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DWARF: Generate the address lookup table from the DIE tree if .debug_aranges is not available.

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Ported from LLDB.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139732 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Benjamin Kramer
2011-09-14 20:52:27 +00:00
parent 55cf815e19
commit 10df80692c
7 changed files with 87 additions and 1 deletions
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26
lib/DebugInfo/DWARFDebugInfoEntry.cpp
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@ -397,7 +397,8 @@ DWARFDebugInfoEntryMinimal::getAttributeValueAsSigned(
}
uint64_t
DWARFDebugInfoEntryMinimal::getAttributeValueAsReference(const DWARFCompileUnit* cu,
DWARFDebugInfoEntryMinimal::getAttributeValueAsReference(
const DWARFCompileUnit* cu,
const uint16_t attr,
uint64_t fail_value) const {
DWARFFormValue form_value;
@ -405,3 +406,26 @@ DWARFDebugInfoEntryMinimal::getAttributeValueAsReference(const DWARFCompileUnit*
return form_value.getReference(cu);
return fail_value;
}
void
DWARFDebugInfoEntryMinimal::buildAddressRangeTable(const DWARFCompileUnit *cu,
DWARFDebugAranges *debug_aranges)
const {
if (AbbrevDecl) {
uint16_t tag = AbbrevDecl->getTag();
if (tag == DW_TAG_subprogram) {
uint64_t hi_pc = -1ULL;
uint64_t lo_pc = getAttributeValueAsUnsigned(cu, DW_AT_low_pc, -1ULL);
if (lo_pc != -1ULL)
hi_pc = getAttributeValueAsUnsigned(cu, DW_AT_high_pc, -1ULL);
if (hi_pc != -1ULL)
debug_aranges->appendRange(cu->getOffset(), lo_pc, hi_pc);
}
const DWARFDebugInfoEntryMinimal *child = getFirstChild();
while (child) {
child->buildAddressRangeTable(cu, debug_aranges);
child = child->getSibling();
}
}
}