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Allow DWARFDebugInfoEntryMinimal::getSubroutineName to resolve cross-unit references.

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Summary: getSubroutineName is currently only used by llvm-symbolizer, thus add a binary test containing a cross-cu inlining example.

Reviewers: samsonov, dblaikie

Subscribers: llvm-commits

Differential Revision: http://reviews.llvm.org/D5394

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@218245 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Frederic Riss
2014-09-22 12:35:53 +00:00
parent 2ee97f03a4
commit cc55b73867
4 changed files with 42 additions and 4 deletions
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20
lib/DebugInfo/DWARFDebugInfoEntry.cpp
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@@ -20,6 +20,17 @@ using namespace llvm;
using namespace dwarf;
typedef DILineInfoSpecifier::FunctionNameKind FunctionNameKind;
// Small helper to extract a DIE pointed by a reference
// attribute. It looks up the Unit containing the DIE and calls
// DIE.extractFast with the right unit. Returns new unit on success,
// nullptr otherwise.
static const DWARFUnit *findUnitAndExtractFast(DWARFDebugInfoEntryMinimal &DIE,
const DWARFUnit *Unit,
uint32_t *Offset) {
Unit = Unit->getUnitSection().getUnitForOffset(*Offset);
return (Unit && DIE.extractFast(Unit, Offset)) ? Unit : nullptr;
}
void DWARFDebugInfoEntryMinimal::dump(raw_ostream &OS, const DWARFUnit *u,
unsigned recurseDepth,
unsigned indent) const {
@@ -315,8 +326,8 @@ DWARFDebugInfoEntryMinimal::getSubroutineName(const DWARFUnit *U,
getAttributeValueAsReference(U, DW_AT_specification, -1U);
if (spec_ref != -1U) {
DWARFDebugInfoEntryMinimal spec_die;
if (spec_die.extractFast(U, &spec_ref)) {
if (const char *name = spec_die.getSubroutineName(U, Kind))
if (const DWARFUnit *RefU = findUnitAndExtractFast(spec_die, U, &spec_ref)) {
if (const char *name = spec_die.getSubroutineName(RefU, Kind))
return name;
}
}
@@ -325,8 +336,9 @@ DWARFDebugInfoEntryMinimal::getSubroutineName(const DWARFUnit *U,
getAttributeValueAsReference(U, DW_AT_abstract_origin, -1U);
if (abs_origin_ref != -1U) {
DWARFDebugInfoEntryMinimal abs_origin_die;
if (abs_origin_die.extractFast(U, &abs_origin_ref)) {
if (const char *name = abs_origin_die.getSubroutineName(U, Kind))
if (const DWARFUnit *RefU = findUnitAndExtractFast(abs_origin_die, U,
&abs_origin_ref)) {
if (const char *name = abs_origin_die.getSubroutineName(RefU, Kind))
return name;
}
}