//
//===----------------------------------------------------------------------===//
-#include "DWARFUnit.h"
-#include "DWARFContext.h"
+#include "llvm/DebugInfo/DWARFUnit.h"
+#include "llvm/DebugInfo/DWARFContext.h"
#include "llvm/DebugInfo/DWARFFormValue.h"
#include "llvm/Support/Dwarf.h"
#include "llvm/Support/Path.h"
using namespace llvm;
using namespace dwarf;
-DWARFUnit::DWARFUnit(const DWARFDebugAbbrev *DA, StringRef IS, StringRef RS,
- StringRef SS, StringRef SOS, StringRef AOS,
- const RelocAddrMap *M, bool LE)
- : Abbrev(DA), InfoSection(IS), RangeSection(RS), StringSection(SS),
- StringOffsetSection(SOS), AddrOffsetSection(AOS), RelocMap(M),
- isLittleEndian(LE) {
+void DWARFUnitSectionBase::parse(DWARFContext &C, const DWARFSection &Section) {
+ parseImpl(C, Section, C.getDebugAbbrev(), C.getRangeSection(),
+ C.getStringSection(), StringRef(), C.getAddrSection(),
+ C.isLittleEndian());
+}
+
+void DWARFUnitSectionBase::parseDWO(DWARFContext &C,
+ const DWARFSection &DWOSection) {
+ parseImpl(C, DWOSection, C.getDebugAbbrevDWO(), C.getRangeDWOSection(),
+ C.getStringDWOSection(), C.getStringOffsetDWOSection(),
+ C.getAddrSection(), C.isLittleEndian());
+}
+
+DWARFUnit::DWARFUnit(DWARFContext &DC, const DWARFSection &Section,
+ const DWARFDebugAbbrev *DA, StringRef RS, StringRef SS,
+ StringRef SOS, StringRef AOS, bool LE,
+ const DWARFUnitSectionBase &UnitSection)
+ : Context(DC), InfoSection(Section), Abbrev(DA), RangeSection(RS),
+ StringSection(SS), StringOffsetSection(SOS), AddrOffsetSection(AOS),
+ isLittleEndian(LE), UnitSection(UnitSection) {
clear();
}
}
void DWARFUnit::setDIERelations() {
- if (DieArray.empty())
+ if (DieArray.size() <= 1)
return;
- DWARFDebugInfoEntryMinimal *die_array_begin = &DieArray.front();
- DWARFDebugInfoEntryMinimal *die_array_end = &DieArray.back();
- DWARFDebugInfoEntryMinimal *curr_die;
- // We purposely are skipping the last element in the array in the loop below
- // so that we can always have a valid next item
- for (curr_die = die_array_begin; curr_die < die_array_end; ++curr_die) {
- // Since our loop doesn't include the last element, we can always
- // safely access the next die in the array.
- DWARFDebugInfoEntryMinimal *next_die = curr_die + 1;
-
- const DWARFAbbreviationDeclaration *curr_die_abbrev =
- curr_die->getAbbreviationDeclarationPtr();
-
- if (curr_die_abbrev) {
- // Normal DIE
- if (curr_die_abbrev->hasChildren())
- next_die->setParent(curr_die);
- else
- curr_die->setSibling(next_die);
+
+ std::vector<DWARFDebugInfoEntryMinimal *> ParentChain;
+ DWARFDebugInfoEntryMinimal *SiblingChain = nullptr;
+ for (auto &DIE : DieArray) {
+ if (SiblingChain) {
+ SiblingChain->setSibling(&DIE);
+ }
+ if (const DWARFAbbreviationDeclaration *AbbrDecl =
+ DIE.getAbbreviationDeclarationPtr()) {
+ // Normal DIE.
+ if (AbbrDecl->hasChildren()) {
+ ParentChain.push_back(&DIE);
+ SiblingChain = nullptr;
+ } else {
+ SiblingChain = &DIE;
+ }
} else {
- // NULL DIE that terminates a sibling chain
- DWARFDebugInfoEntryMinimal *parent = curr_die->getParent();
- if (parent)
- parent->setSibling(next_die);
+ // NULL entry terminates the sibling chain.
+ SiblingChain = ParentChain.back();
+ ParentChain.pop_back();
}
}
-
- // Since we skipped the last element, we need to fix it up!
- if (die_array_begin < die_array_end)
- curr_die->setParent(die_array_begin);
+ assert(SiblingChain == nullptr || SiblingChain == &DieArray[0]);
+ assert(ParentChain.empty());
}
void DWARFUnit::extractDIEsToVector(
Dies.push_back(DIE);
}
- const DWARFAbbreviationDeclaration *AbbrDecl =
- DIE.getAbbreviationDeclarationPtr();
- if (AbbrDecl) {
+ if (const DWARFAbbreviationDeclaration *AbbrDecl =
+ DIE.getAbbreviationDeclarationPtr()) {
// Normal DIE
if (AbbrDecl->hasChildren())
++Depth;
AddrOffsetSectionBase = DieArray[0].getAttributeValueAsSectionOffset(
this, DW_AT_GNU_addr_base, 0);
RangeSectionBase = DieArray[0].getAttributeValueAsSectionOffset(
- this, DW_AT_GNU_ranges_base, 0);
+ this, DW_AT_ranges_base, 0);
+ // Don't fall back to DW_AT_GNU_ranges_base: it should be ignored for
+ // skeleton CU DIE, so that DWARF users not aware of it are not broken.
}
setDIERelations();
return DieArray.size();
}
-DWARFUnit::DWOHolder::DWOHolder(object::ObjectFile *DWOFile)
- : DWOFile(DWOFile),
- DWOContext(cast<DWARFContext>(DIContext::getDWARFContext(DWOFile))),
- DWOU(nullptr) {
+DWARFUnit::DWOHolder::DWOHolder(StringRef DWOPath)
+ : DWOFile(), DWOContext(), DWOU(nullptr) {
+ auto Obj = object::ObjectFile::createObjectFile(DWOPath);
+ if (!Obj)
+ return;
+ DWOFile = std::move(Obj.get());
+ DWOContext.reset(
+ cast<DWARFContext>(DIContext::getDWARFContext(*DWOFile.getBinary())));
if (DWOContext->getNumDWOCompileUnits() > 0)
DWOU = DWOContext->getDWOCompileUnitAtIndex(0);
}
sys::path::append(AbsolutePath, CompilationDir);
}
sys::path::append(AbsolutePath, DWOFileName);
- ErrorOr<object::ObjectFile *> DWOFile =
- object::ObjectFile::createObjectFile(AbsolutePath);
- if (!DWOFile)
- return false;
- // Reset DWOHolder.
- DWO.reset(new DWOHolder(DWOFile.get()));
+ DWO = llvm::make_unique<DWOHolder>(AbsolutePath);
DWARFUnit *DWOCU = DWO->getUnit();
// Verify that compile unit in .dwo file is valid.
if (!DWOCU || DWOCU->getDWOId() != getDWOId()) {
}
// Share .debug_addr and .debug_ranges section with compile unit in .dwo
DWOCU->setAddrOffsetSection(AddrOffsetSection, AddrOffsetSectionBase);
- DWOCU->setRangesSection(RangeSection, RangeSectionBase);
+ uint32_t DWORangesBase = DieArray[0].getRangesBaseAttribute(this, 0);
+ DWOCU->setRangesSection(RangeSection, DWORangesBase);
return true;
}