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Add support for DebugFission to DWARF parser

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Summary:
1) Make llvm-symbolizer properly symbolize
files with split debug info (by using stanalone .dwo files).
2) Make DWARFCompileUnit parse and store corresponding .dwo file,
if necessary.
3) Make bits of DWARF parsing more CompileUnit-oriented.

Reviewers: echristo

Reviewed By: echristo

CC: bkramer, llvm-commits

Differential Revision: http://llvm-reviews.chandlerc.com/D1164

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@189329 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Alexey Samsonov
2013-08-27 09:20:22 +00:00
parent 1567abe74f
commit 63fd2af389
7 changed files with 250 additions and 91 deletions
Download Patch File Download Diff File Expand all files Collapse all files

63
lib/DebugInfo/DWARFDebugInfoEntry.cpp
View File

@@ -222,29 +222,30 @@ DWARFDebugInfoEntryMinimal::getAttributeValue(const DWARFCompileUnit *cu,
return 0;
}
const char*
DWARFDebugInfoEntryMinimal::getAttributeValueAsString(
const DWARFCompileUnit* cu,
const uint16_t attr,
const char* fail_value)
const {
DWARFFormValue form_value;
if (getAttributeValue(cu, attr, form_value)) {
DataExtractor stringExtractor(cu->getStringSection(), false, 0);
return form_value.getAsCString(&stringExtractor);
}
return fail_value;
const char *DWARFDebugInfoEntryMinimal::getAttributeValueAsString(
const DWARFCompileUnit *CU, const uint16_t Attr,
const char *FailValue) const {
DWARFFormValue FormValue;
if (getAttributeValue(CU, Attr, FormValue))
return FormValue.getAsCString(CU);
return FailValue;
}
uint64_t
DWARFDebugInfoEntryMinimal::getAttributeValueAsUnsigned(
const DWARFCompileUnit* cu,
const uint16_t attr,
uint64_t fail_value) const {
DWARFFormValue form_value;
if (getAttributeValue(cu, attr, form_value))
return form_value.getUnsigned();
return fail_value;
uint64_t DWARFDebugInfoEntryMinimal::getAttributeValueAsAddress(
const DWARFCompileUnit *CU, const uint16_t Attr, uint64_t FailValue) const {
DWARFFormValue FormValue;
if (getAttributeValue(CU, Attr, FormValue))
return FormValue.getAsAddress(CU);
return FailValue;
}
uint64_t DWARFDebugInfoEntryMinimal::getAttributeValueAsUnsigned(
const DWARFCompileUnit *CU, const uint16_t Attr, uint64_t FailValue) const {
DWARFFormValue FormValue;
if (getAttributeValue(CU, Attr, FormValue)) {
return FormValue.getUnsigned();
}
return FailValue;
}
int64_t
@@ -274,29 +275,29 @@ bool DWARFDebugInfoEntryMinimal::getLowAndHighPC(const DWARFCompileUnit *CU,
uint64_t &LowPC,
uint64_t &HighPC) const {
HighPC = -1ULL;
LowPC = getAttributeValueAsUnsigned(CU, DW_AT_low_pc, -1ULL);
LowPC = getAttributeValueAsAddress(CU, DW_AT_low_pc, -1ULL);
if (LowPC != -1ULL)
HighPC = getAttributeValueAsUnsigned(CU, DW_AT_high_pc, -1ULL);
HighPC = getAttributeValueAsAddress(CU, DW_AT_high_pc, -1ULL);
return (HighPC != -1ULL);
}
void
DWARFDebugInfoEntryMinimal::buildAddressRangeTable(const DWARFCompileUnit *CU,
DWARFDebugAranges *DebugAranges)
DWARFDebugAranges *DebugAranges,
uint32_t CUOffsetInAranges)
const {
if (AbbrevDecl) {
if (isSubprogramDIE()) {
uint64_t LowPC, HighPC;
if (getLowAndHighPC(CU, LowPC, HighPC)) {
DebugAranges->appendRange(CU->getOffset(), LowPC, HighPC);
}
if (getLowAndHighPC(CU, LowPC, HighPC))
DebugAranges->appendRange(CUOffsetInAranges, LowPC, HighPC);
// FIXME: try to append ranges from .debug_ranges section.
}
const DWARFDebugInfoEntryMinimal *child = getFirstChild();
while (child) {
child->buildAddressRangeTable(CU, DebugAranges);
child = child->getSibling();
const DWARFDebugInfoEntryMinimal *Child = getFirstChild();
while (Child) {
Child->buildAddressRangeTable(CU, DebugAranges, CUOffsetInAranges);
Child = Child->getSibling();
}
}
}