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Exract most of DWARFCompileUnit into a new DWARFUnit to prepare for the coming DWARFTypeUnit.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@191233 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
David Blaikie 2013-09-23 22:44:40 +00:00
parent f2058addc2
commit cd7c4980d4
10 changed files with 704 additions and 675 deletions
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16
include/llvm/DebugInfo/DWARFFormValue.h
View File

@ -14,7 +14,7 @@
namespace llvm {
class DWARFCompileUnit;
class DWARFUnit;
class raw_ostream;
class DWARFFormValue {
@ -49,23 +49,23 @@ public:
DWARFFormValue(uint16_t form = 0) : Form(form) {}
uint16_t getForm() const { return Form; }
const ValueType& value() const { return Value; }
void dump(raw_ostream &OS, const DWARFCompileUnit* cu) const;
void dump(raw_ostream &OS, const DWARFUnit *U) const;
bool extractValue(DataExtractor data, uint32_t *offset_ptr,
const DWARFCompileUnit *cu);
const DWARFUnit *u);
bool isInlinedCStr() const {
return Value.data != NULL && Value.data == (const uint8_t*)Value.cstr;
}
const uint8_t *BlockData() const;
uint64_t getReference(const DWARFCompileUnit* cu) const;
uint64_t getReference(const DWARFUnit *U) const;
uint64_t getUnsigned() const { return Value.uval; }
int64_t getSigned() const { return Value.sval; }
const char *getAsCString(const DWARFCompileUnit *CU) const;
uint64_t getAsAddress(const DWARFCompileUnit *CU) const;
const char *getAsCString(const DWARFUnit *U) const;
uint64_t getAsAddress(const DWARFUnit *U) const;
bool skipValue(DataExtractor debug_info_data, uint32_t *offset_ptr,
const DWARFCompileUnit *cu) const;
const DWARFUnit *u) const;
static bool skipValue(uint16_t form, DataExtractor debug_info_data,
uint32_t *offset_ptr, const DWARFCompileUnit *cu);
uint32_t *offset_ptr, const DWARFUnit *u);
static bool isBlockForm(uint16_t form);
static bool isDataForm(uint16_t form);
static const uint8_t *getFixedFormSizes(uint8_t AddrSize, uint16_t Version);

1
lib/DebugInfo/CMakeLists.txt
View File

@ -12,4 +12,5 @@ add_llvm_library(LLVMDebugInfo
DWARFDebugLoc.cpp
DWARFDebugRangeList.cpp
DWARFFormValue.cpp
DWARFUnit.cpp
)

375
lib/DebugInfo/DWARFCompileUnit.cpp
View File

@ -8,119 +8,18 @@
//===----------------------------------------------------------------------===//
#include "DWARFCompileUnit.h"
#include "DWARFContext.h"
#include "llvm/DebugInfo/DWARFFormValue.h"
#include "llvm/Support/Dwarf.h"
#include "llvm/Support/Format.h"
#include "llvm/Support/Path.h"
#include "llvm/Support/raw_ostream.h"
using namespace llvm;
using namespace dwarf;
bool DWARFCompileUnit::getAddrOffsetSectionItem(uint32_t Index,
uint64_t &Result) const {
uint32_t Offset = AddrOffsetSectionBase + Index * AddrSize;
if (AddrOffsetSection.size() < Offset + AddrSize)
return false;
DataExtractor DA(AddrOffsetSection, isLittleEndian, AddrSize);
Result = DA.getAddress(&Offset);
return true;
}
bool DWARFCompileUnit::getStringOffsetSectionItem(uint32_t Index,
uint32_t &Result) const {
// FIXME: string offset section entries are 8-byte for DWARF64.
const uint32_t ItemSize = 4;
uint32_t Offset = Index * ItemSize;
if (StringOffsetSection.size() < Offset + ItemSize)
return false;
DataExtractor DA(StringOffsetSection, isLittleEndian, 0);
Result = DA.getU32(&Offset);
return true;
}
bool DWARFCompileUnit::extract(DataExtractor debug_info, uint32_t *offset_ptr) {
clear();
Offset = *offset_ptr;
if (debug_info.isValidOffset(*offset_ptr)) {
uint64_t abbrOffset;
Length = debug_info.getU32(offset_ptr);
Version = debug_info.getU16(offset_ptr);
abbrOffset = debug_info.getU32(offset_ptr);
AddrSize = debug_info.getU8(offset_ptr);
bool lengthOK = debug_info.isValidOffset(getNextCompileUnitOffset()-1);
bool versionOK = DWARFContext::isSupportedVersion(Version);
bool abbrOffsetOK = AbbrevSection.size() > abbrOffset;
bool addrSizeOK = AddrSize == 4 || AddrSize == 8;
if (lengthOK && versionOK && addrSizeOK && abbrOffsetOK && Abbrev != NULL) {
Abbrevs = Abbrev->getAbbreviationDeclarationSet(abbrOffset);
return true;
}
// reset the offset to where we tried to parse from if anything went wrong
*offset_ptr = Offset;
}
return false;
}
uint32_t
DWARFCompileUnit::extract(uint32_t offset, DataExtractor debug_info_data,
const DWARFAbbreviationDeclarationSet *abbrevs) {
clear();
Offset = offset;
if (debug_info_data.isValidOffset(offset)) {
Length = debug_info_data.getU32(&offset);
Version = debug_info_data.getU16(&offset);
bool abbrevsOK = debug_info_data.getU32(&offset) == abbrevs->getOffset();
Abbrevs = abbrevs;
AddrSize = debug_info_data.getU8(&offset);
bool versionOK = DWARFContext::isSupportedVersion(Version);
bool addrSizeOK = AddrSize == 4 || AddrSize == 8;
if (versionOK && addrSizeOK && abbrevsOK &&
debug_info_data.isValidOffset(offset))
return offset;
}
return 0;
}
bool DWARFCompileUnit::extractRangeList(uint32_t RangeListOffset,
DWARFDebugRangeList &RangeList) const {
// Require that compile unit is extracted.
assert(DieArray.size() > 0);
DataExtractor RangesData(RangeSection, isLittleEndian, AddrSize);
uint32_t ActualRangeListOffset = RangeSectionBase + RangeListOffset;
return RangeList.extract(RangesData, &ActualRangeListOffset);
}
void DWARFCompileUnit::clear() {
Offset = 0;
Length = 0;
Version = 0;
Abbrevs = 0;
AddrSize = 0;
BaseAddr = 0;
RangeSectionBase = 0;
AddrOffsetSectionBase = 0;
clearDIEs(false);
DWO.reset();
}
void DWARFCompileUnit::dump(raw_ostream &OS) {
OS << format("0x%08x", Offset) << ": Compile Unit:"
<< " length = " << format("0x%08x", Length)
<< " version = " << format("0x%04x", Version)
<< " abbr_offset = " << format("0x%04x", Abbrevs->getOffset())
<< " addr_size = " << format("0x%02x", AddrSize)
<< " (next CU at " << format("0x%08x", getNextCompileUnitOffset())
OS << format("0x%08x", getOffset()) << ": Compile Unit:"
<< " length = " << format("0x%08x", getLength())
<< " version = " << format("0x%04x", getVersion())
<< " abbr_offset = " << format("0x%04x", getAbbreviations()->getOffset())
<< " addr_size = " << format("0x%02x", getAddressByteSize())
<< " (next unit at " << format("0x%08x", getNextUnitOffset())
<< ")\n";
const DWARFDebugInfoEntryMinimal *CU = getCompileUnitDIE(false);
@ -128,262 +27,6 @@ void DWARFCompileUnit::dump(raw_ostream &OS) {
CU->dump(OS, this, -1U);
}
const char *DWARFCompileUnit::getCompilationDir() {
extractDIEsIfNeeded(true);
if (DieArray.empty())
return 0;
return DieArray[0].getAttributeValueAsString(this, DW_AT_comp_dir, 0);
// VTable anchor.
DWARFCompileUnit::~DWARFCompileUnit() {
}
uint64_t DWARFCompileUnit::getDWOId() {
extractDIEsIfNeeded(true);
const uint64_t FailValue = -1ULL;
if (DieArray.empty())
return FailValue;
return DieArray[0]
.getAttributeValueAsUnsigned(this, DW_AT_GNU_dwo_id, FailValue);
}
void DWARFCompileUnit::setDIERelations() {
if (DieArray.empty())
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);
} else {
// NULL DIE that terminates a sibling chain
DWARFDebugInfoEntryMinimal *parent = curr_die->getParent();
if (parent)
parent->setSibling(next_die);
}
}
// 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);
}
void DWARFCompileUnit::extractDIEsToVector(
bool AppendCUDie, bool AppendNonCUDies,
std::vector<DWARFDebugInfoEntryMinimal> &Dies) const {
if (!AppendCUDie && !AppendNonCUDies)
return;
// Set the offset to that of the first DIE and calculate the start of the
// next compilation unit header.
uint32_t Offset = getFirstDIEOffset();
uint32_t NextCUOffset = getNextCompileUnitOffset();
DWARFDebugInfoEntryMinimal DIE;
uint32_t Depth = 0;
const uint8_t *FixedFormSizes =
DWARFFormValue::getFixedFormSizes(getAddressByteSize(), getVersion());
bool IsCUDie = true;
while (Offset < NextCUOffset &&
DIE.extractFast(this, FixedFormSizes, &Offset)) {
if (IsCUDie) {
if (AppendCUDie)
Dies.push_back(DIE);
if (!AppendNonCUDies)
break;
// The average bytes per DIE entry has been seen to be
// around 14-20 so let's pre-reserve the needed memory for
// our DIE entries accordingly.
Dies.reserve(Dies.size() + getDebugInfoSize() / 14);
IsCUDie = false;
} else {
Dies.push_back(DIE);
}
const DWARFAbbreviationDeclaration *AbbrDecl =
DIE.getAbbreviationDeclarationPtr();
if (AbbrDecl) {
// Normal DIE
if (AbbrDecl->hasChildren())
++Depth;
} else {
// NULL DIE.
if (Depth > 0)
--Depth;
if (Depth == 0)
break; // We are done with this compile unit!
}
}
// Give a little bit of info if we encounter corrupt DWARF (our offset
// should always terminate at or before the start of the next compilation
// unit header).
if (Offset > NextCUOffset)
fprintf(stderr, "warning: DWARF compile unit extends beyond its "
"bounds cu 0x%8.8x at 0x%8.8x'\n", getOffset(), Offset);
}
size_t DWARFCompileUnit::extractDIEsIfNeeded(bool CUDieOnly) {
if ((CUDieOnly && DieArray.size() > 0) ||
DieArray.size() > 1)
return 0; // Already parsed.
bool HasCUDie = DieArray.size() > 0;
extractDIEsToVector(!HasCUDie, !CUDieOnly, DieArray);
if (DieArray.empty())
return 0;
// If CU DIE was just parsed, copy several attribute values from it.
if (!HasCUDie) {
uint64_t BaseAddr =
DieArray[0].getAttributeValueAsUnsigned(this, DW_AT_low_pc, -1U);
if (BaseAddr == -1U)
BaseAddr = DieArray[0].getAttributeValueAsUnsigned(this, DW_AT_entry_pc, 0);
setBaseAddress(BaseAddr);
AddrOffsetSectionBase =
DieArray[0].getAttributeValueAsReference(this, DW_AT_GNU_addr_base, 0);
RangeSectionBase =
DieArray[0].getAttributeValueAsReference(this, DW_AT_GNU_ranges_base, 0);
}
setDIERelations();
return DieArray.size();
}
DWARFCompileUnit::DWOHolder::DWOHolder(object::ObjectFile *DWOFile)
: DWOFile(DWOFile),
DWOContext(cast<DWARFContext>(DIContext::getDWARFContext(DWOFile))),
DWOCU(0) {
if (DWOContext->getNumDWOCompileUnits() > 0)
DWOCU = DWOContext->getDWOCompileUnitAtIndex(0);
}
bool DWARFCompileUnit::parseDWO() {
if (DWO.get() != 0)
return false;
extractDIEsIfNeeded(true);
if (DieArray.empty())
return false;
const char *DWOFileName =
DieArray[0].getAttributeValueAsString(this, DW_AT_GNU_dwo_name, 0);
if (DWOFileName == 0)
return false;
const char *CompilationDir =
DieArray[0].getAttributeValueAsString(this, DW_AT_comp_dir, 0);
SmallString<16> AbsolutePath;
if (sys::path::is_relative(DWOFileName) && CompilationDir != 0) {
sys::path::append(AbsolutePath, CompilationDir);
}
sys::path::append(AbsolutePath, DWOFileName);
object::ObjectFile *DWOFile =
object::ObjectFile::createObjectFile(AbsolutePath);
if (!DWOFile)
return false;
// Reset DWOHolder.
DWO.reset(new DWOHolder(DWOFile));
DWARFCompileUnit *DWOCU = DWO->getCU();
// Verify that compile unit in .dwo file is valid.
if (DWOCU == 0 || DWOCU->getDWOId() != getDWOId()) {
DWO.reset();
return false;
}
// Share .debug_addr and .debug_ranges section with compile unit in .dwo
DWOCU->setAddrOffsetSection(AddrOffsetSection, AddrOffsetSectionBase);
DWOCU->setRangesSection(RangeSection, RangeSectionBase);
return true;
}
void DWARFCompileUnit::clearDIEs(bool KeepCUDie) {
if (DieArray.size() > (unsigned)KeepCUDie) {
// std::vectors never get any smaller when resized to a smaller size,
// or when clear() or erase() are called, the size will report that it
// is smaller, but the memory allocated remains intact (call capacity()
// to see this). So we need to create a temporary vector and swap the
// contents which will cause just the internal pointers to be swapped
// so that when temporary vector goes out of scope, it will destroy the
// contents.
std::vector<DWARFDebugInfoEntryMinimal> TmpArray;
DieArray.swap(TmpArray);
// Save at least the compile unit DIE
if (KeepCUDie)
DieArray.push_back(TmpArray.front());
}
}
void
DWARFCompileUnit::buildAddressRangeTable(DWARFDebugAranges *debug_aranges,
bool clear_dies_if_already_not_parsed,
uint32_t CUOffsetInAranges) {
// This function is usually called if there in no .debug_aranges section
// in order to produce a compile unit level set of address ranges that
// is accurate. If the DIEs weren't parsed, then we don't want all dies for
// all compile units to stay loaded when they weren't needed. So we can end
// up parsing the DWARF and then throwing them all away to keep memory usage
// down.
const bool clear_dies = extractDIEsIfNeeded(false) > 1 &&
clear_dies_if_already_not_parsed;
DieArray[0].buildAddressRangeTable(this, debug_aranges, CUOffsetInAranges);
bool DWOCreated = parseDWO();
if (DWO.get()) {
// If there is a .dwo file for this compile unit, then skeleton CU DIE
// doesn't have children, and we should instead build address range table
// from DIEs in the .debug_info.dwo section of .dwo file.
DWO->getCU()->buildAddressRangeTable(
debug_aranges, clear_dies_if_already_not_parsed, CUOffsetInAranges);
}
if (DWOCreated && clear_dies_if_already_not_parsed)
DWO.reset();
// Keep memory down by clearing DIEs if this generate function
// caused them to be parsed.
if (clear_dies)
clearDIEs(true);
}
const DWARFDebugInfoEntryMinimal *
DWARFCompileUnit::getSubprogramForAddress(uint64_t Address) {
extractDIEsIfNeeded(false);
for (size_t i = 0, n = DieArray.size(); i != n; i++)
if (DieArray[i].isSubprogramDIE() &&
DieArray[i].addressRangeContainsAddress(this, Address)) {
return &DieArray[i];
}
return 0;
}
DWARFDebugInfoEntryInlinedChain
DWARFCompileUnit::getInlinedChainForAddress(uint64_t Address) {
// First, find a subprogram that contains the given address (the root
// of inlined chain).
const DWARFCompileUnit *ChainCU = 0;
const DWARFDebugInfoEntryMinimal *SubprogramDIE =
getSubprogramForAddress(Address);
if (SubprogramDIE) {
ChainCU = this;
} else {
// Try to look for subprogram DIEs in the DWO file.
parseDWO();
if (DWO.get()) {
SubprogramDIE = DWO->getCU()->getSubprogramForAddress(Address);
if (SubprogramDIE)
ChainCU = DWO->getCU();
}
}
// Get inlined chain rooted at this subprogram DIE.
if (!SubprogramDIE)
return DWARFDebugInfoEntryInlinedChain();
return SubprogramDIE->getInlinedChainForAddress(ChainCU, Address);
}

161
lib/DebugInfo/DWARFCompileUnit.h
View File

@ -10,168 +10,19 @@
#ifndef LLVM_DEBUGINFO_DWARFCOMPILEUNIT_H
#define LLVM_DEBUGINFO_DWARFCOMPILEUNIT_H
#include "llvm/ADT/OwningPtr.h"
#include "DWARFDebugAbbrev.h"
#include "DWARFDebugInfoEntry.h"
#include "DWARFDebugRangeList.h"
#include "DWARFRelocMap.h"
#include <vector>
#include "DWARFUnit.h"
namespace llvm {
namespace object {
class ObjectFile;
}
class DWARFDebugAbbrev;
class StringRef;
class raw_ostream;
class DWARFCompileUnit {
DWARFCompileUnit(DWARFCompileUnit const &) LLVM_DELETED_FUNCTION;
DWARFCompileUnit &operator=(DWARFCompileUnit const &) LLVM_DELETED_FUNCTION;
const DWARFDebugAbbrev *Abbrev;
StringRef InfoSection;
StringRef AbbrevSection;
StringRef RangeSection;
uint32_t RangeSectionBase;
StringRef StringSection;
StringRef StringOffsetSection;
StringRef AddrOffsetSection;
uint32_t AddrOffsetSectionBase;
const RelocAddrMap *RelocMap;
bool isLittleEndian;
uint32_t Offset;
uint32_t Length;
uint16_t Version;
const DWARFAbbreviationDeclarationSet *Abbrevs;
uint8_t AddrSize;
uint64_t BaseAddr;
// The compile unit debug information entry items.
std::vector<DWARFDebugInfoEntryMinimal> DieArray;
class DWOHolder {
OwningPtr<object::ObjectFile> DWOFile;
OwningPtr<DWARFContext> DWOContext;
DWARFCompileUnit *DWOCU;
public:
DWOHolder(object::ObjectFile *DWOFile);
DWARFCompileUnit *getCU() const { return DWOCU; }
};
OwningPtr<DWOHolder> DWO;
class DWARFCompileUnit : public DWARFUnit {
public:
DWARFCompileUnit(const DWARFDebugAbbrev *DA, StringRef IS, StringRef AS,
StringRef RS, StringRef SS, StringRef SOS, StringRef AOS,
const RelocAddrMap *M, bool LE) :
Abbrev(DA), InfoSection(IS), AbbrevSection(AS),
RangeSection(RS), StringSection(SS), StringOffsetSection(SOS),
AddrOffsetSection(AOS), RelocMap(M), isLittleEndian(LE) {
clear();
}
StringRef getStringSection() const { return StringSection; }
StringRef getStringOffsetSection() const { return StringOffsetSection; }
void setAddrOffsetSection(StringRef AOS, uint32_t Base) {
AddrOffsetSection = AOS;
AddrOffsetSectionBase = Base;
}
void setRangesSection(StringRef RS, uint32_t Base) {
RangeSection = RS;
RangeSectionBase = Base;
}
bool getAddrOffsetSectionItem(uint32_t Index, uint64_t &Result) const;
// FIXME: Result should be uint64_t in DWARF64.
bool getStringOffsetSectionItem(uint32_t Index, uint32_t &Result) const;
DataExtractor getDebugInfoExtractor() const {
return DataExtractor(InfoSection, isLittleEndian, AddrSize);
}
DataExtractor getStringExtractor() const {
return DataExtractor(StringSection, false, 0);
}
const RelocAddrMap *getRelocMap() const { return RelocMap; }
bool extract(DataExtractor debug_info, uint32_t* offset_ptr);
uint32_t extract(uint32_t offset, DataExtractor debug_info_data,
const DWARFAbbreviationDeclarationSet *abbrevs);
/// extractDIEsIfNeeded - Parses a compile unit and indexes its DIEs if it
/// hasn't already been done. Returns the number of DIEs parsed at this call.
size_t extractDIEsIfNeeded(bool CUDieOnly);
/// extractRangeList - extracts the range list referenced by this compile
/// unit from .debug_ranges section. Returns true on success.
/// Requires that compile unit is already extracted.
bool extractRangeList(uint32_t RangeListOffset,
DWARFDebugRangeList &RangeList) const;
void clear();
const RelocAddrMap *M, bool LE)
: DWARFUnit(DA, IS, AS, RS, SS, SOS, AOS, M, LE) {}
void dump(raw_ostream &OS);
uint32_t getOffset() const { return Offset; }
/// Size in bytes of the compile unit header.
uint32_t getSize() const { return 11; }
bool containsDIEOffset(uint32_t die_offset) const {
return die_offset >= getFirstDIEOffset() &&
die_offset < getNextCompileUnitOffset();
}
uint32_t getFirstDIEOffset() const { return Offset + getSize(); }
uint32_t getNextCompileUnitOffset() const { return Offset + Length + 4; }
/// Size in bytes of the .debug_info data associated with this compile unit.
size_t getDebugInfoSize() const { return Length + 4 - getSize(); }
uint32_t getLength() const { return Length; }
uint16_t getVersion() const { return Version; }
const DWARFAbbreviationDeclarationSet *getAbbreviations() const {
return Abbrevs;
}
uint8_t getAddressByteSize() const { return AddrSize; }
uint64_t getBaseAddress() const { return BaseAddr; }
void setBaseAddress(uint64_t base_addr) {
BaseAddr = base_addr;
}
const DWARFDebugInfoEntryMinimal *
getCompileUnitDIE(bool extract_cu_die_only = true) {
extractDIEsIfNeeded(extract_cu_die_only);
return DieArray.empty() ? NULL : &DieArray[0];
}
const char *getCompilationDir();
uint64_t getDWOId();
/// setDIERelations - We read in all of the DIE entries into our flat list
/// of DIE entries and now we need to go back through all of them and set the
/// parent, sibling and child pointers for quick DIE navigation.
void setDIERelations();
void buildAddressRangeTable(DWARFDebugAranges *debug_aranges,
bool clear_dies_if_already_not_parsed,
uint32_t CUOffsetInAranges);
/// getInlinedChainForAddress - fetches inlined chain for a given address.
/// Returns empty chain if there is no subprogram containing address. The
/// chain is valid as long as parsed compile unit DIEs are not cleared.
DWARFDebugInfoEntryInlinedChain getInlinedChainForAddress(uint64_t Address);
private:
/// extractDIEsToVector - Appends all parsed DIEs to a vector.
void extractDIEsToVector(bool AppendCUDie, bool AppendNonCUDIEs,
std::vector<DWARFDebugInfoEntryMinimal> &DIEs) const;
/// clearDIEs - Clear parsed DIEs to keep memory usage low.
void clearDIEs(bool KeepCUDie);
/// parseDWO - Parses .dwo file for current compile unit. Returns true if
/// it was actually constructed.
bool parseDWO();
/// getSubprogramForAddress - Returns subprogram DIE with address range
/// encompassing the provided address. The pointer is alive as long as parsed
/// compile unit DIEs are not cleared.
const DWARFDebugInfoEntryMinimal *getSubprogramForAddress(uint64_t Address);
// VTable anchor.
~DWARFCompileUnit() LLVM_OVERRIDE;
};
}

12
lib/DebugInfo/DWARFContext.cpp
View File

@ -283,7 +283,7 @@ void DWARFContext::parseCompileUnits() {
break;
}
CUs.push_back(CU.take());
offset = CUs.back()->getNextCompileUnitOffset();
offset = CUs.back()->getNextUnitOffset();
}
}
@ -301,7 +301,7 @@ void DWARFContext::parseDWOCompileUnits() {
break;
}
DWOCUs.push_back(DWOCU.take());
offset = DWOCUs.back()->getNextCompileUnitOffset();
offset = DWOCUs.back()->getNextUnitOffset();
}
}
@ -400,7 +400,7 @@ DILineInfo DWARFContext::getLineInfoForAddress(uint64_t Address,
CU->getInlinedChainForAddress(Address);
if (InlinedChain.DIEs.size() > 0) {
const DWARFDebugInfoEntryMinimal &TopFunctionDIE = InlinedChain.DIEs[0];
if (const char *Name = TopFunctionDIE.getSubroutineName(InlinedChain.CU))
if (const char *Name = TopFunctionDIE.getSubroutineName(InlinedChain.U))
FunctionName = Name;
}
}
@ -433,7 +433,7 @@ DILineInfoTable DWARFContext::getLineInfoForAddressRange(uint64_t Address,
CU->getInlinedChainForAddress(Address);
if (InlinedChain.DIEs.size() > 0) {
const DWARFDebugInfoEntryMinimal &TopFunctionDIE = InlinedChain.DIEs[0];
if (const char *Name = TopFunctionDIE.getSubroutineName(InlinedChain.CU))
if (const char *Name = TopFunctionDIE.getSubroutineName(InlinedChain.U))
FunctionName = Name;
}
}
@ -492,7 +492,7 @@ DIInliningInfo DWARFContext::getInliningInfoForAddress(uint64_t Address,
uint32_t Column = 0;
// Get function name if necessary.
if (Specifier.needs(DILineInfoSpecifier::FunctionName)) {
if (const char *Name = FunctionDIE.getSubroutineName(InlinedChain.CU))
if (const char *Name = FunctionDIE.getSubroutineName(InlinedChain.U))
FunctionName = Name;
}
if (Specifier.needs(DILineInfoSpecifier::FileLineInfo)) {
@ -516,7 +516,7 @@ DIInliningInfo DWARFContext::getInliningInfoForAddress(uint64_t Address,
}
// Get call file/line/column of a current DIE.
if (i + 1 < n) {
FunctionDIE.getCallerFrame(InlinedChain.CU, CallFile, CallLine,
FunctionDIE.getCallerFrame(InlinedChain.U, CallFile, CallLine,
CallColumn);
}
}

177
lib/DebugInfo/DWARFDebugInfoEntry.cpp
View File

@ -19,11 +19,10 @@
using namespace llvm;
using namespace dwarf;
void DWARFDebugInfoEntryMinimal::dump(raw_ostream &OS,
const DWARFCompileUnit *cu,
void DWARFDebugInfoEntryMinimal::dump(raw_ostream &OS, const DWARFUnit *u,
unsigned recurseDepth,
unsigned indent) const {
DataExtractor debug_info_data = cu->getDebugInfoExtractor();
DataExtractor debug_info_data = u->getDebugInfoExtractor();
uint32_t offset = Offset;
if (debug_info_data.isValidOffset(offset)) {
@ -45,13 +44,13 @@ void DWARFDebugInfoEntryMinimal::dump(raw_ostream &OS,
for (uint32_t i = 0; i != numAttributes; ++i) {
uint16_t attr = AbbrevDecl->getAttrByIndex(i);
uint16_t form = AbbrevDecl->getFormByIndex(i);
dumpAttribute(OS, cu, &offset, attr, form, indent);
dumpAttribute(OS, u, &offset, attr, form, indent);
}
const DWARFDebugInfoEntryMinimal *child = getFirstChild();
if (recurseDepth > 0 && child) {
while (child) {
child->dump(OS, cu, recurseDepth-1, indent+2);
child->dump(OS, u, recurseDepth-1, indent+2);
child = child->getSibling();
}
}
@ -66,10 +65,9 @@ void DWARFDebugInfoEntryMinimal::dump(raw_ostream &OS,
}
void DWARFDebugInfoEntryMinimal::dumpAttribute(raw_ostream &OS,
const DWARFCompileUnit *cu,
uint32_t* offset_ptr,
uint16_t attr,
uint16_t form,
const DWARFUnit *u,
uint32_t *offset_ptr,
uint16_t attr, uint16_t form,
unsigned indent) const {
OS << " ";
OS.indent(indent+2);
@ -86,26 +84,26 @@ void DWARFDebugInfoEntryMinimal::dumpAttribute(raw_ostream &OS,
DWARFFormValue formValue(form);
if (!formValue.extractValue(cu->getDebugInfoExtractor(), offset_ptr, cu))
if (!formValue.extractValue(u->getDebugInfoExtractor(), offset_ptr, u))
return;
OS << "\t(";
formValue.dump(OS, cu);
formValue.dump(OS, u);
OS << ")\n";
}
bool DWARFDebugInfoEntryMinimal::extractFast(const DWARFCompileUnit *CU,
bool DWARFDebugInfoEntryMinimal::extractFast(const DWARFUnit *U,
const uint8_t *FixedFormSizes,
uint32_t *OffsetPtr) {
Offset = *OffsetPtr;
DataExtractor DebugInfoData = CU->getDebugInfoExtractor();
DataExtractor DebugInfoData = U->getDebugInfoExtractor();
uint64_t AbbrCode = DebugInfoData.getULEB128(OffsetPtr);
if (0 == AbbrCode) {
// NULL debug tag entry.
AbbrevDecl = NULL;
return true;
}
AbbrevDecl = CU->getAbbreviations()->getAbbreviationDeclaration(AbbrCode);
AbbrevDecl = U->getAbbreviations()->getAbbreviationDeclaration(AbbrCode);
assert(AbbrevDecl);
assert(FixedFormSizes); // For best performance this should be specified!
@ -121,7 +119,7 @@ bool DWARFDebugInfoEntryMinimal::extractFast(const DWARFCompileUnit *CU,
if (FixedFormSize)
*OffsetPtr += FixedFormSize;
else if (!DWARFFormValue::skipValue(Form, DebugInfoData, OffsetPtr,
CU)) {
U)) {
// Restore the original offset.
*OffsetPtr = Offset;
return false;
@ -130,13 +128,12 @@ bool DWARFDebugInfoEntryMinimal::extractFast(const DWARFCompileUnit *CU,
return true;
}
bool
DWARFDebugInfoEntryMinimal::extract(const DWARFCompileUnit *CU,
uint32_t *OffsetPtr) {
DataExtractor DebugInfoData = CU->getDebugInfoExtractor();
const uint32_t CUEndOffset = CU->getNextCompileUnitOffset();
bool DWARFDebugInfoEntryMinimal::extract(const DWARFUnit *U,
uint32_t *OffsetPtr) {
DataExtractor DebugInfoData = U->getDebugInfoExtractor();
const uint32_t UEndOffset = U->getNextUnitOffset();
Offset = *OffsetPtr;
if ((Offset >= CUEndOffset) || !DebugInfoData.isValidOffset(Offset))
if ((Offset >= UEndOffset) || !DebugInfoData.isValidOffset(Offset))
return false;
uint64_t AbbrCode = DebugInfoData.getULEB128(OffsetPtr);
if (0 == AbbrCode) {
@ -144,7 +141,7 @@ DWARFDebugInfoEntryMinimal::extract(const DWARFCompileUnit *CU,
AbbrevDecl = NULL;
return true;
}
AbbrevDecl = CU->getAbbreviations()->getAbbreviationDeclaration(AbbrCode);
AbbrevDecl = U->getAbbreviations()->getAbbreviationDeclaration(AbbrCode);
if (0 == AbbrevDecl) {
// Restore the original offset.
*OffsetPtr = Offset;
@ -152,7 +149,7 @@ DWARFDebugInfoEntryMinimal::extract(const DWARFCompileUnit *CU,
}
bool IsCompileUnitTag = (AbbrevDecl->getTag() == DW_TAG_compile_unit);
if (IsCompileUnitTag)
const_cast<DWARFCompileUnit*>(CU)->setBaseAddress(0);
const_cast<DWARFUnit *>(U)->setBaseAddress(0);
// Skip all data in the .debug_info for the attributes
for (uint32_t i = 0, n = AbbrevDecl->getNumAttributes(); i < n; ++i) {
@ -162,13 +159,11 @@ DWARFDebugInfoEntryMinimal::extract(const DWARFCompileUnit *CU,
if (IsCompileUnitTag &&
((Attr == DW_AT_entry_pc) || (Attr == DW_AT_low_pc))) {
DWARFFormValue FormValue(Form);
if (FormValue.extractValue(DebugInfoData, OffsetPtr, CU)) {
if (FormValue.extractValue(DebugInfoData, OffsetPtr, U)) {
if (Attr == DW_AT_low_pc || Attr == DW_AT_entry_pc)
const_cast<DWARFCompileUnit*>(CU)
->setBaseAddress(FormValue.getUnsigned());
const_cast<DWARFUnit *>(U)->setBaseAddress(FormValue.getUnsigned());
}
} else if (!DWARFFormValue::skipValue(Form, DebugInfoData, OffsetPtr,
CU)) {
} else if (!DWARFFormValue::skipValue(Form, DebugInfoData, OffsetPtr, U)) {
// Restore the original offset.
*OffsetPtr = Offset;
return false;
@ -187,19 +182,16 @@ bool DWARFDebugInfoEntryMinimal::isSubroutineDIE() const {
Tag == DW_TAG_inlined_subroutine;
}
uint32_t
DWARFDebugInfoEntryMinimal::getAttributeValue(const DWARFCompileUnit *cu,
const uint16_t attr,
DWARFFormValue &form_value,
uint32_t *end_attr_offset_ptr)
const {
uint32_t DWARFDebugInfoEntryMinimal::getAttributeValue(
const DWARFUnit *u, const uint16_t attr, DWARFFormValue &form_value,
uint32_t *end_attr_offset_ptr) const {
if (AbbrevDecl) {
uint32_t attr_idx = AbbrevDecl->findAttributeIndex(attr);
if (attr_idx != -1U) {
uint32_t offset = getOffset();
DataExtractor debug_info_data = cu->getDebugInfoExtractor();
DataExtractor debug_info_data = u->getDebugInfoExtractor();
// Skip the abbreviation code so we are at the data for the attributes
debug_info_data.getULEB128(&offset);
@ -207,11 +199,11 @@ DWARFDebugInfoEntryMinimal::getAttributeValue(const DWARFCompileUnit *cu,
uint32_t idx = 0;
while (idx < attr_idx)
DWARFFormValue::skipValue(AbbrevDecl->getFormByIndex(idx++),
debug_info_data, &offset, cu);
debug_info_data, &offset, u);
const uint32_t attr_offset = offset;
form_value = DWARFFormValue(AbbrevDecl->getFormByIndex(idx));
if (form_value.extractValue(debug_info_data, &offset, cu)) {
if (form_value.extractValue(debug_info_data, &offset, u)) {
if (end_attr_offset_ptr)
*end_attr_offset_ptr = offset;
return attr_offset;
@ -223,155 +215,140 @@ DWARFDebugInfoEntryMinimal::getAttributeValue(const DWARFCompileUnit *cu,
}
const char *DWARFDebugInfoEntryMinimal::getAttributeValueAsString(
const DWARFCompileUnit *CU, const uint16_t Attr,
const char *FailValue) const {
const DWARFUnit *U, const uint16_t Attr, const char *FailValue) const {
DWARFFormValue FormValue;
if (getAttributeValue(CU, Attr, FormValue))
return FormValue.getAsCString(CU);
if (getAttributeValue(U, Attr, FormValue))
return FormValue.getAsCString(U);
return FailValue;
}
uint64_t DWARFDebugInfoEntryMinimal::getAttributeValueAsAddress(
const DWARFCompileUnit *CU, const uint16_t Attr, uint64_t FailValue) const {
const DWARFUnit *U, const uint16_t Attr, uint64_t FailValue) const {
DWARFFormValue FormValue;
if (getAttributeValue(CU, Attr, FormValue))
return FormValue.getAsAddress(CU);
if (getAttributeValue(U, Attr, FormValue))
return FormValue.getAsAddress(U);
return FailValue;
}
uint64_t DWARFDebugInfoEntryMinimal::getAttributeValueAsUnsigned(
const DWARFCompileUnit *CU, const uint16_t Attr, uint64_t FailValue) const {
const DWARFUnit *U, const uint16_t Attr, uint64_t FailValue) const {
DWARFFormValue FormValue;
if (getAttributeValue(CU, Attr, FormValue)) {
if (getAttributeValue(U, Attr, FormValue))
return FormValue.getUnsigned();
}
return FailValue;
}
int64_t
DWARFDebugInfoEntryMinimal::getAttributeValueAsSigned(
const DWARFCompileUnit* cu,
const uint16_t attr,
int64_t fail_value) const {
int64_t DWARFDebugInfoEntryMinimal::getAttributeValueAsSigned(
const DWARFUnit *u, const uint16_t attr, int64_t fail_value) const {
DWARFFormValue form_value;
if (getAttributeValue(cu, attr, form_value))
if (getAttributeValue(u, attr, form_value))
return form_value.getSigned();
return fail_value;
}
uint64_t
DWARFDebugInfoEntryMinimal::getAttributeValueAsReference(
const DWARFCompileUnit* cu,
const uint16_t attr,
uint64_t fail_value)
const {
uint64_t DWARFDebugInfoEntryMinimal::getAttributeValueAsReference(
const DWARFUnit *u, const uint16_t attr, uint64_t fail_value) const {
DWARFFormValue form_value;
if (getAttributeValue(cu, attr, form_value))
return form_value.getReference(cu);
if (getAttributeValue(u, attr, form_value))
return form_value.getReference(u);
return fail_value;
}
bool DWARFDebugInfoEntryMinimal::getLowAndHighPC(const DWARFCompileUnit *CU,
bool DWARFDebugInfoEntryMinimal::getLowAndHighPC(const DWARFUnit *U,
uint64_t &LowPC,
uint64_t &HighPC) const {
HighPC = -1ULL;
LowPC = getAttributeValueAsAddress(CU, DW_AT_low_pc, -1ULL);
LowPC = getAttributeValueAsAddress(U, DW_AT_low_pc, -1ULL);
if (LowPC != -1ULL)
HighPC = getAttributeValueAsAddress(CU, DW_AT_high_pc, -1ULL);
HighPC = getAttributeValueAsAddress(U, DW_AT_high_pc, -1ULL);
return (HighPC != -1ULL);
}
void
DWARFDebugInfoEntryMinimal::buildAddressRangeTable(const DWARFCompileUnit *CU,
DWARFDebugAranges *DebugAranges,
uint32_t CUOffsetInAranges)
const {
void DWARFDebugInfoEntryMinimal::buildAddressRangeTable(
const DWARFUnit *U, DWARFDebugAranges *DebugAranges,
uint32_t UOffsetInAranges) const {
if (AbbrevDecl) {
if (isSubprogramDIE()) {
uint64_t LowPC, HighPC;
if (getLowAndHighPC(CU, LowPC, HighPC))
DebugAranges->appendRange(CUOffsetInAranges, LowPC, HighPC);
if (getLowAndHighPC(U, LowPC, HighPC))
DebugAranges->appendRange(UOffsetInAranges, LowPC, HighPC);
// FIXME: try to append ranges from .debug_ranges section.
}
const DWARFDebugInfoEntryMinimal *Child = getFirstChild();
while (Child) {
Child->buildAddressRangeTable(CU, DebugAranges, CUOffsetInAranges);
Child->buildAddressRangeTable(U, DebugAranges, UOffsetInAranges);
Child = Child->getSibling();
}
}
}
bool
DWARFDebugInfoEntryMinimal::addressRangeContainsAddress(
const DWARFCompileUnit *CU,
const uint64_t Address)
const {
bool DWARFDebugInfoEntryMinimal::addressRangeContainsAddress(
const DWARFUnit *U, const uint64_t Address) const {
if (isNULL())
return false;
uint64_t LowPC, HighPC;
if (getLowAndHighPC(CU, LowPC, HighPC))
if (getLowAndHighPC(U, LowPC, HighPC))
return (LowPC <= Address && Address <= HighPC);
// Try to get address ranges from .debug_ranges section.
uint32_t RangesOffset = getAttributeValueAsReference(CU, DW_AT_ranges, -1U);
uint32_t RangesOffset = getAttributeValueAsReference(U, DW_AT_ranges, -1U);
if (RangesOffset != -1U) {
DWARFDebugRangeList RangeList;
if (CU->extractRangeList(RangesOffset, RangeList))
return RangeList.containsAddress(CU->getBaseAddress(), Address);
if (U->extractRangeList(RangesOffset, RangeList))
return RangeList.containsAddress(U->getBaseAddress(), Address);
}
return false;
}
const char*
DWARFDebugInfoEntryMinimal::getSubroutineName(const DWARFCompileUnit *CU)
const {
const char *
DWARFDebugInfoEntryMinimal::getSubroutineName(const DWARFUnit *U) const {
if (!isSubroutineDIE())
return 0;
// Try to get mangled name if possible.
if (const char *name =
getAttributeValueAsString(CU, DW_AT_MIPS_linkage_name, 0))
getAttributeValueAsString(U, DW_AT_MIPS_linkage_name, 0))
return name;
if (const char *name = getAttributeValueAsString(CU, DW_AT_linkage_name, 0))
if (const char *name = getAttributeValueAsString(U, DW_AT_linkage_name, 0))
return name;
if (const char *name = getAttributeValueAsString(CU, DW_AT_name, 0))
if (const char *name = getAttributeValueAsString(U, DW_AT_name, 0))
return name;
// Try to get name from specification DIE.
uint32_t spec_ref =
getAttributeValueAsReference(CU, DW_AT_specification, -1U);
getAttributeValueAsReference(U, DW_AT_specification, -1U);
if (spec_ref != -1U) {
DWARFDebugInfoEntryMinimal spec_die;
if (spec_die.extract(CU, &spec_ref)) {
if (const char *name = spec_die.getSubroutineName(CU))
if (spec_die.extract(U, &spec_ref)) {
if (const char *name = spec_die.getSubroutineName(U))
return name;
}
}
// Try to get name from abstract origin DIE.
uint32_t abs_origin_ref =
getAttributeValueAsReference(CU, DW_AT_abstract_origin, -1U);
getAttributeValueAsReference(U, DW_AT_abstract_origin, -1U);
if (abs_origin_ref != -1U) {
DWARFDebugInfoEntryMinimal abs_origin_die;
if (abs_origin_die.extract(CU, &abs_origin_ref)) {
if (const char *name = abs_origin_die.getSubroutineName(CU))
if (abs_origin_die.extract(U, &abs_origin_ref)) {
if (const char *name = abs_origin_die.getSubroutineName(U))
return name;
}
}
return 0;
}
void DWARFDebugInfoEntryMinimal::getCallerFrame(const DWARFCompileUnit *CU,
void DWARFDebugInfoEntryMinimal::getCallerFrame(const DWARFUnit *U,
uint32_t &CallFile,
uint32_t &CallLine,
uint32_t &CallColumn) const {
CallFile = getAttributeValueAsUnsigned(CU, DW_AT_call_file, 0);
CallLine = getAttributeValueAsUnsigned(CU, DW_AT_call_line, 0);
CallColumn = getAttributeValueAsUnsigned(CU, DW_AT_call_column, 0);
CallFile = getAttributeValueAsUnsigned(U, DW_AT_call_file, 0);
CallLine = getAttributeValueAsUnsigned(U, DW_AT_call_line, 0);
CallColumn = getAttributeValueAsUnsigned(U, DW_AT_call_column, 0);
}
DWARFDebugInfoEntryInlinedChain
DWARFDebugInfoEntryMinimal::getInlinedChainForAddress(
const DWARFCompileUnit *CU, const uint64_t Address) const {
const DWARFUnit *U, const uint64_t Address) const {
DWARFDebugInfoEntryInlinedChain InlinedChain;
InlinedChain.CU = CU;
InlinedChain.U = U;
if (isNULL())
return InlinedChain;
for (const DWARFDebugInfoEntryMinimal *DIE = this; DIE; ) {
@ -383,7 +360,7 @@ DWARFDebugInfoEntryMinimal::getInlinedChainForAddress(
// Try to get child which also contains provided address.
const DWARFDebugInfoEntryMinimal *Child = DIE->getFirstChild();
while (Child) {
if (Child->addressRangeContainsAddress(CU, Address)) {
if (Child->addressRangeContainsAddress(U, Address)) {
// Assume there is only one such child.
break;
}

52
lib/DebugInfo/DWARFDebugInfoEntry.h
View File

@ -18,6 +18,7 @@ namespace llvm {
class DWARFDebugAranges;
class DWARFCompileUnit;
class DWARFUnit;
class DWARFContext;
class DWARFFormValue;
struct DWARFDebugInfoEntryInlinedChain;
@ -39,23 +40,22 @@ public:
DWARFDebugInfoEntryMinimal()
: Offset(0), ParentIdx(0), SiblingIdx(0), AbbrevDecl(0) {}
void dump(raw_ostream &OS, const DWARFCompileUnit *cu,
unsigned recurseDepth, unsigned indent = 0) const;
void dumpAttribute(raw_ostream &OS, const DWARFCompileUnit *cu,
uint32_t *offset_ptr, uint16_t attr, uint16_t form,
unsigned indent = 0) const;
void dump(raw_ostream &OS, const DWARFUnit *u, unsigned recurseDepth,
unsigned indent = 0) const;
void dumpAttribute(raw_ostream &OS, const DWARFUnit *u, uint32_t *offset_ptr,
uint16_t attr, uint16_t form, unsigned indent = 0) const;
/// Extracts a debug info entry, which is a child of a given compile unit,
/// starting at a given offset. If DIE can't be extracted, returns false and
/// doesn't change OffsetPtr.
bool extractFast(const DWARFCompileUnit *CU, const uint8_t *FixedFormSizes,
bool extractFast(const DWARFUnit *U, const uint8_t *FixedFormSizes,
uint32_t *OffsetPtr);
/// Extract a debug info entry for a given compile unit from the
/// .debug_info and .debug_abbrev data starting at the given offset.
/// If compile unit can't be parsed, returns false and doesn't change
/// OffsetPtr.
bool extract(const DWARFCompileUnit *CU, uint32_t *OffsetPtr);
bool extract(const DWARFUnit *U, uint32_t *OffsetPtr);
uint32_t getTag() const { return AbbrevDecl ? AbbrevDecl->getTag() : 0; }
bool isNULL() const { return AbbrevDecl == 0; }
@ -120,59 +120,53 @@ public:
return AbbrevDecl;
}
uint32_t getAttributeValue(const DWARFCompileUnit *cu,
const uint16_t attr, DWARFFormValue &formValue,
uint32_t getAttributeValue(const DWARFUnit *u, const uint16_t attr,
DWARFFormValue &formValue,
uint32_t *end_attr_offset_ptr = 0) const;
const char* getAttributeValueAsString(const DWARFCompileUnit* cu,
const uint16_t attr,
const char *getAttributeValueAsString(const DWARFUnit *u, const uint16_t attr,
const char *fail_value) const;
uint64_t getAttributeValueAsAddress(const DWARFCompileUnit *CU,
const uint16_t Attr,
uint64_t getAttributeValueAsAddress(const DWARFUnit *U, const uint16_t Attr,
uint64_t FailValue) const;
uint64_t getAttributeValueAsUnsigned(const DWARFCompileUnit *cu,
const uint16_t attr,
uint64_t getAttributeValueAsUnsigned(const DWARFUnit *u, const uint16_t attr,
uint64_t fail_value) const;
uint64_t getAttributeValueAsReference(const DWARFCompileUnit *cu,
const uint16_t attr,
uint64_t getAttributeValueAsReference(const DWARFUnit *u, const uint16_t attr,
uint64_t fail_value) const;
int64_t getAttributeValueAsSigned(const DWARFCompileUnit* cu,
const uint16_t attr,
int64_t getAttributeValueAsSigned(const DWARFUnit *u, const uint16_t attr,
int64_t fail_value) const;
/// Retrieves DW_AT_low_pc and DW_AT_high_pc from CU.
/// Returns true if both attributes are present.
bool getLowAndHighPC(const DWARFCompileUnit *CU,
uint64_t &LowPC, uint64_t &HighPC) const;
bool getLowAndHighPC(const DWARFUnit *U, uint64_t &LowPC,
uint64_t &HighPC) const;
void buildAddressRangeTable(const DWARFCompileUnit *CU,
void buildAddressRangeTable(const DWARFUnit *U,
DWARFDebugAranges *DebugAranges,
uint32_t CUOffsetInAranges) const;
bool addressRangeContainsAddress(const DWARFCompileUnit *CU,
bool addressRangeContainsAddress(const DWARFUnit *U,
const uint64_t Address) const;
/// If a DIE represents a subprogram (or inlined subroutine),
/// returns its mangled name (or short name, if mangled is missing).
/// This name may be fetched from specification or abstract origin
/// for this subprogram. Returns null if no name is found.
const char* getSubroutineName(const DWARFCompileUnit *CU) const;
const char *getSubroutineName(const DWARFUnit *U) const;
/// Retrieves values of DW_AT_call_file, DW_AT_call_line and
/// DW_AT_call_column from DIE (or zeroes if they are missing).
void getCallerFrame(const DWARFCompileUnit *CU, uint32_t &CallFile,
void getCallerFrame(const DWARFUnit *U, uint32_t &CallFile,
uint32_t &CallLine, uint32_t &CallColumn) const;
/// Get inlined chain for a given address, rooted at the current DIE.
/// Returns empty chain if address is not contained in address range
/// of current DIE.
DWARFDebugInfoEntryInlinedChain
getInlinedChainForAddress(const DWARFCompileUnit *CU,
const uint64_t Address) const;
getInlinedChainForAddress(const DWARFUnit *U, const uint64_t Address) const;
};
/// DWARFDebugInfoEntryInlinedChain - represents a chain of inlined_subroutine
@ -181,9 +175,9 @@ public:
/// (except the last DIE) in this chain is contained in address
/// range for next DIE in the chain.
struct DWARFDebugInfoEntryInlinedChain {
DWARFDebugInfoEntryInlinedChain() : CU(0) {}
DWARFDebugInfoEntryInlinedChain() : U(0) {}
SmallVector<DWARFDebugInfoEntryMinimal, 4> DIEs;
const DWARFCompileUnit *CU;
const DWARFUnit *U;
};
}

19
lib/DebugInfo/DWARFFormValue.cpp
View File

@ -74,9 +74,8 @@ DWARFFormValue::getFixedFormSizes(uint8_t AddrSize, uint16_t Version) {
return 0;
}
bool
DWARFFormValue::extractValue(DataExtractor data, uint32_t *offset_ptr,
const DWARFCompileUnit *cu) {
bool DWARFFormValue::extractValue(DataExtractor data, uint32_t *offset_ptr,
const DWARFUnit *cu) {
bool indirect = false;
bool is_block = false;
Value.data = NULL;
@ -206,13 +205,13 @@ DWARFFormValue::extractValue(DataExtractor data, uint32_t *offset_ptr,
bool
DWARFFormValue::skipValue(DataExtractor debug_info_data, uint32_t* offset_ptr,
const DWARFCompileUnit *cu) const {
const DWARFUnit *cu) const {
return DWARFFormValue::skipValue(Form, debug_info_data, offset_ptr, cu);
}
bool
DWARFFormValue::skipValue(uint16_t form, DataExtractor debug_info_data,
uint32_t *offset_ptr, const DWARFCompileUnit *cu) {
uint32_t *offset_ptr, const DWARFUnit *cu) {
bool indirect = false;
do {
switch (form) {
@ -312,7 +311,7 @@ DWARFFormValue::skipValue(uint16_t form, DataExtractor debug_info_data,
}
void
DWARFFormValue::dump(raw_ostream &OS, const DWARFCompileUnit *cu) const {
DWARFFormValue::dump(raw_ostream &OS, const DWARFUnit *cu) const {
DataExtractor debug_str_data(cu->getStringSection(), true, 0);
DataExtractor debug_str_offset_data(cu->getStringOffsetSection(), true, 0);
uint64_t uvalue = getUnsigned();
@ -436,8 +435,7 @@ DWARFFormValue::dump(raw_ostream &OS, const DWARFCompileUnit *cu) const {
OS << format(" => {0x%8.8" PRIx64 "}", uvalue + (cu ? cu->getOffset() : 0));
}
const char*
DWARFFormValue::getAsCString(const DWARFCompileUnit *CU) const {
const char *DWARFFormValue::getAsCString(const DWARFUnit *CU) const {
if (isInlinedCStr())
return Value.cstr;
if (!CU)
@ -452,8 +450,7 @@ DWARFFormValue::getAsCString(const DWARFCompileUnit *CU) const {
return CU->getStringExtractor().getCStr(&Offset);
}
uint64_t
DWARFFormValue::getAsAddress(const DWARFCompileUnit *CU) const {
uint64_t DWARFFormValue::getAsAddress(const DWARFUnit *CU) const {
if (!CU)
return 0;
if (Value.IsDWOIndex) {
@ -466,7 +463,7 @@ DWARFFormValue::getAsAddress(const DWARFCompileUnit *CU) const {
return Value.uval;
}
uint64_t DWARFFormValue::getReference(const DWARFCompileUnit *cu) const {
uint64_t DWARFFormValue::getReference(const DWARFUnit *cu) const {
uint64_t die_offset = Value.uval;
switch (Form) {
case DW_FORM_ref1:

391
lib/DebugInfo/DWARFUnit.cpp Normal file
View File

@ -0,0 +1,391 @@
//===-- DWARFUnit.cpp -----------------------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "DWARFUnit.h"
#include "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 AS,
StringRef RS, StringRef SS, StringRef SOS, StringRef AOS,
const RelocAddrMap *M, bool LE)
: Abbrev(DA), InfoSection(IS), AbbrevSection(AS), RangeSection(RS),
StringSection(SS), StringOffsetSection(SOS), AddrOffsetSection(AOS),
RelocMap(M), isLittleEndian(LE) {
clear();
}
DWARFUnit::~DWARFUnit() {
}
bool DWARFUnit::getAddrOffsetSectionItem(uint32_t Index,
uint64_t &Result) const {
uint32_t Offset = AddrOffsetSectionBase + Index * AddrSize;
if (AddrOffsetSection.size() < Offset + AddrSize)
return false;
DataExtractor DA(AddrOffsetSection, isLittleEndian, AddrSize);
Result = DA.getAddress(&Offset);
return true;
}
bool DWARFUnit::getStringOffsetSectionItem(uint32_t Index,
uint32_t &Result) const {
// FIXME: string offset section entries are 8-byte for DWARF64.
const uint32_t ItemSize = 4;
uint32_t Offset = Index * ItemSize;
if (StringOffsetSection.size() < Offset + ItemSize)
return false;
DataExtractor DA(StringOffsetSection, isLittleEndian, 0);
Result = DA.getU32(&Offset);
return true;
}
bool DWARFUnit::extractImpl(DataExtractor debug_info, uint32_t *offset_ptr) {
Length = debug_info.getU32(offset_ptr);
Version = debug_info.getU16(offset_ptr);
uint64_t abbrOffset = debug_info.getU32(offset_ptr);
AddrSize = debug_info.getU8(offset_ptr);
bool lengthOK = debug_info.isValidOffset(getNextUnitOffset() - 1);
bool versionOK = DWARFContext::isSupportedVersion(Version);
bool abbrOffsetOK = AbbrevSection.size() > abbrOffset;
bool addrSizeOK = AddrSize == 4 || AddrSize == 8;
if (!lengthOK || !versionOK || !addrSizeOK || !abbrOffsetOK)
return false;
Abbrevs = Abbrev->getAbbreviationDeclarationSet(abbrOffset);
return true;
}
bool DWARFUnit::extract(DataExtractor debug_info, uint32_t *offset_ptr) {
clear();
Offset = *offset_ptr;
if (debug_info.isValidOffset(*offset_ptr)) {
if (extractImpl(debug_info, offset_ptr))
return true;
// reset the offset to where we tried to parse from if anything went wrong
*offset_ptr = Offset;
}
return false;
}
uint32_t
DWARFUnit::extract(uint32_t offset, DataExtractor debug_info_data,
const DWARFAbbreviationDeclarationSet *abbrevs) {
clear();
Offset = offset;
if (debug_info_data.isValidOffset(offset)) {
Length = debug_info_data.getU32(&offset);
Version = debug_info_data.getU16(&offset);
bool abbrevsOK = debug_info_data.getU32(&offset) == abbrevs->getOffset();
Abbrevs = abbrevs;
AddrSize = debug_info_data.getU8(&offset);
bool versionOK = DWARFContext::isSupportedVersion(Version);
bool addrSizeOK = AddrSize == 4 || AddrSize == 8;
if (versionOK && addrSizeOK && abbrevsOK &&
debug_info_data.isValidOffset(offset))
return offset;
}
return 0;
}
bool DWARFUnit::extractRangeList(uint32_t RangeListOffset,
DWARFDebugRangeList &RangeList) const {
// Require that compile unit is extracted.
assert(DieArray.size() > 0);
DataExtractor RangesData(RangeSection, isLittleEndian, AddrSize);
uint32_t ActualRangeListOffset = RangeSectionBase + RangeListOffset;
return RangeList.extract(RangesData, &ActualRangeListOffset);
}
void DWARFUnit::clear() {
Offset = 0;
Length = 0;
Version = 0;
Abbrevs = 0;
AddrSize = 0;
BaseAddr = 0;
RangeSectionBase = 0;
AddrOffsetSectionBase = 0;
clearDIEs(false);
DWO.reset();
}
const char *DWARFUnit::getCompilationDir() {
extractDIEsIfNeeded(true);
if (DieArray.empty())
return 0;
return DieArray[0].getAttributeValueAsString(this, DW_AT_comp_dir, 0);
}
uint64_t DWARFUnit::getDWOId() {
extractDIEsIfNeeded(true);
const uint64_t FailValue = -1ULL;
if (DieArray.empty())
return FailValue;
return DieArray[0]
.getAttributeValueAsUnsigned(this, DW_AT_GNU_dwo_id, FailValue);
}
void DWARFUnit::setDIERelations() {
if (DieArray.empty())
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);
} else {
// NULL DIE that terminates a sibling chain
DWARFDebugInfoEntryMinimal *parent = curr_die->getParent();
if (parent)
parent->setSibling(next_die);
}
}
// 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);
}
void DWARFUnit::extractDIEsToVector(
bool AppendCUDie, bool AppendNonCUDies,
std::vector<DWARFDebugInfoEntryMinimal> &Dies) const {
if (!AppendCUDie && !AppendNonCUDies)
return;
// Set the offset to that of the first DIE and calculate the start of the
// next compilation unit header.
uint32_t Offset = getFirstDIEOffset();
uint32_t NextCUOffset = getNextUnitOffset();
DWARFDebugInfoEntryMinimal DIE;
uint32_t Depth = 0;
const uint8_t *FixedFormSizes =
DWARFFormValue::getFixedFormSizes(getAddressByteSize(), getVersion());
bool IsCUDie = true;
while (Offset < NextCUOffset &&
DIE.extractFast(this, FixedFormSizes, &Offset)) {
if (IsCUDie) {
if (AppendCUDie)
Dies.push_back(DIE);
if (!AppendNonCUDies)
break;
// The average bytes per DIE entry has been seen to be
// around 14-20 so let's pre-reserve the needed memory for
// our DIE entries accordingly.
Dies.reserve(Dies.size() + getDebugInfoSize() / 14);
IsCUDie = false;
} else {
Dies.push_back(DIE);
}
const DWARFAbbreviationDeclaration *AbbrDecl =
DIE.getAbbreviationDeclarationPtr();
if (AbbrDecl) {
// Normal DIE
if (AbbrDecl->hasChildren())
++Depth;
} else {
// NULL DIE.
if (Depth > 0)
--Depth;
if (Depth == 0)
break; // We are done with this compile unit!
}
}
// Give a little bit of info if we encounter corrupt DWARF (our offset
// should always terminate at or before the start of the next compilation
// unit header).
if (Offset > NextCUOffset)
fprintf(stderr, "warning: DWARF compile unit extends beyond its "
"bounds cu 0x%8.8x at 0x%8.8x'\n", getOffset(), Offset);
}
size_t DWARFUnit::extractDIEsIfNeeded(bool CUDieOnly) {
if ((CUDieOnly && DieArray.size() > 0) ||
DieArray.size() > 1)
return 0; // Already parsed.
bool HasCUDie = DieArray.size() > 0;
extractDIEsToVector(!HasCUDie, !CUDieOnly, DieArray);
if (DieArray.empty())
return 0;
// If CU DIE was just parsed, copy several attribute values from it.
if (!HasCUDie) {
uint64_t BaseAddr =
DieArray[0].getAttributeValueAsUnsigned(this, DW_AT_low_pc, -1U);
if (BaseAddr == -1U)
BaseAddr = DieArray[0].getAttributeValueAsUnsigned(this, DW_AT_entry_pc, 0);
setBaseAddress(BaseAddr);
AddrOffsetSectionBase =
DieArray[0].getAttributeValueAsReference(this, DW_AT_GNU_addr_base, 0);
RangeSectionBase =
DieArray[0].getAttributeValueAsReference(this, DW_AT_GNU_ranges_base, 0);
}
setDIERelations();
return DieArray.size();
}
DWARFUnit::DWOHolder::DWOHolder(object::ObjectFile *DWOFile)
: DWOFile(DWOFile),
DWOContext(cast<DWARFContext>(DIContext::getDWARFContext(DWOFile))),
DWOU(0) {
if (DWOContext->getNumDWOCompileUnits() > 0)
DWOU = DWOContext->getDWOCompileUnitAtIndex(0);
}
bool DWARFUnit::parseDWO() {
if (DWO.get() != 0)
return false;
extractDIEsIfNeeded(true);
if (DieArray.empty())
return false;
const char *DWOFileName =
DieArray[0].getAttributeValueAsString(this, DW_AT_GNU_dwo_name, 0);
if (DWOFileName == 0)
return false;
const char *CompilationDir =
DieArray[0].getAttributeValueAsString(this, DW_AT_comp_dir, 0);
SmallString<16> AbsolutePath;
if (sys::path::is_relative(DWOFileName) && CompilationDir != 0) {
sys::path::append(AbsolutePath, CompilationDir);
}
sys::path::append(AbsolutePath, DWOFileName);
object::ObjectFile *DWOFile =
object::ObjectFile::createObjectFile(AbsolutePath);
if (!DWOFile)
return false;
// Reset DWOHolder.
DWO.reset(new DWOHolder(DWOFile));
DWARFUnit *DWOCU = DWO->getUnit();
// Verify that compile unit in .dwo file is valid.
if (DWOCU == 0 || DWOCU->getDWOId() != getDWOId()) {
DWO.reset();
return false;
}
// Share .debug_addr and .debug_ranges section with compile unit in .dwo
DWOCU->setAddrOffsetSection(AddrOffsetSection, AddrOffsetSectionBase);
DWOCU->setRangesSection(RangeSection, RangeSectionBase);
return true;
}
void DWARFUnit::clearDIEs(bool KeepCUDie) {
if (DieArray.size() > (unsigned)KeepCUDie) {
// std::vectors never get any smaller when resized to a smaller size,
// or when clear() or erase() are called, the size will report that it
// is smaller, but the memory allocated remains intact (call capacity()
// to see this). So we need to create a temporary vector and swap the
// contents which will cause just the internal pointers to be swapped
// so that when temporary vector goes out of scope, it will destroy the
// contents.
std::vector<DWARFDebugInfoEntryMinimal> TmpArray;
DieArray.swap(TmpArray);
// Save at least the compile unit DIE
if (KeepCUDie)
DieArray.push_back(TmpArray.front());
}
}
void
DWARFUnit::buildAddressRangeTable(DWARFDebugAranges *debug_aranges,
bool clear_dies_if_already_not_parsed,
uint32_t CUOffsetInAranges) {
// This function is usually called if there in no .debug_aranges section
// in order to produce a compile unit level set of address ranges that
// is accurate. If the DIEs weren't parsed, then we don't want all dies for
// all compile units to stay loaded when they weren't needed. So we can end
// up parsing the DWARF and then throwing them all away to keep memory usage
// down.
const bool clear_dies = extractDIEsIfNeeded(false) > 1 &&
clear_dies_if_already_not_parsed;
DieArray[0].buildAddressRangeTable(this, debug_aranges, CUOffsetInAranges);
bool DWOCreated = parseDWO();
if (DWO.get()) {
// If there is a .dwo file for this compile unit, then skeleton CU DIE
// doesn't have children, and we should instead build address range table
// from DIEs in the .debug_info.dwo section of .dwo file.
DWO->getUnit()->buildAddressRangeTable(
debug_aranges, clear_dies_if_already_not_parsed, CUOffsetInAranges);
}
if (DWOCreated && clear_dies_if_already_not_parsed)
DWO.reset();
// Keep memory down by clearing DIEs if this generate function
// caused them to be parsed.
if (clear_dies)
clearDIEs(true);
}
const DWARFDebugInfoEntryMinimal *
DWARFUnit::getSubprogramForAddress(uint64_t Address) {
extractDIEsIfNeeded(false);
for (size_t i = 0, n = DieArray.size(); i != n; i++)
if (DieArray[i].isSubprogramDIE() &&
DieArray[i].addressRangeContainsAddress(this, Address)) {
return &DieArray[i];
}
return 0;
}
DWARFDebugInfoEntryInlinedChain
DWARFUnit::getInlinedChainForAddress(uint64_t Address) {
// First, find a subprogram that contains the given address (the root
// of inlined chain).
const DWARFUnit *ChainCU = 0;
const DWARFDebugInfoEntryMinimal *SubprogramDIE =
getSubprogramForAddress(Address);
if (SubprogramDIE) {
ChainCU = this;
} else {
// Try to look for subprogram DIEs in the DWO file.
parseDWO();
if (DWO.get()) {
SubprogramDIE = DWO->getUnit()->getSubprogramForAddress(Address);
if (SubprogramDIE)
ChainCU = DWO->getUnit();
}
}
// Get inlined chain rooted at this subprogram DIE.
if (!SubprogramDIE)
return DWARFDebugInfoEntryInlinedChain();
return SubprogramDIE->getInlinedChainForAddress(ChainCU, Address);
}

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//===-- DWARFUnit.h ---------------------------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_DEBUGINFO_DWARFUNIT_H
#define LLVM_DEBUGINFO_DWARFUNIT_H
#include "llvm/ADT/OwningPtr.h"
#include "DWARFDebugAbbrev.h"
#include "DWARFDebugInfoEntry.h"
#include "DWARFDebugRangeList.h"
#include "DWARFRelocMap.h"
#include <vector>
namespace llvm {
namespace object {
class ObjectFile;
}
class DWARFDebugAbbrev;
class StringRef;
class raw_ostream;
class DWARFUnit {
const DWARFDebugAbbrev *Abbrev;
StringRef InfoSection;
StringRef AbbrevSection;
StringRef RangeSection;
uint32_t RangeSectionBase;
StringRef StringSection;
StringRef StringOffsetSection;
StringRef AddrOffsetSection;
uint32_t AddrOffsetSectionBase;
const RelocAddrMap *RelocMap;
bool isLittleEndian;
uint32_t Offset;
uint32_t Length;
uint16_t Version;
const DWARFAbbreviationDeclarationSet *Abbrevs;
uint8_t AddrSize;
uint64_t BaseAddr;
// The compile unit debug information entry items.
std::vector<DWARFDebugInfoEntryMinimal> DieArray;
class DWOHolder {
OwningPtr<object::ObjectFile> DWOFile;
OwningPtr<DWARFContext> DWOContext;
DWARFUnit *DWOU;
public:
DWOHolder(object::ObjectFile *DWOFile);
DWARFUnit *getUnit() const { return DWOU; }
};
OwningPtr<DWOHolder> DWO;
protected:
virtual bool extractImpl(DataExtractor debug_info, uint32_t *offset_ptr);
public:
DWARFUnit(const DWARFDebugAbbrev *DA, StringRef IS, StringRef AS,
StringRef RS, StringRef SS, StringRef SOS, StringRef AOS,
const RelocAddrMap *M, bool LE);
virtual ~DWARFUnit();
StringRef getStringSection() const { return StringSection; }
StringRef getStringOffsetSection() const { return StringOffsetSection; }
void setAddrOffsetSection(StringRef AOS, uint32_t Base) {
AddrOffsetSection = AOS;
AddrOffsetSectionBase = Base;
}
void setRangesSection(StringRef RS, uint32_t Base) {
RangeSection = RS;
RangeSectionBase = Base;
}
bool getAddrOffsetSectionItem(uint32_t Index, uint64_t &Result) const;
// FIXME: Result should be uint64_t in DWARF64.
bool getStringOffsetSectionItem(uint32_t Index, uint32_t &Result) const;
DataExtractor getDebugInfoExtractor() const {
return DataExtractor(InfoSection, isLittleEndian, AddrSize);
}
DataExtractor getStringExtractor() const {
return DataExtractor(StringSection, false, 0);
}
const RelocAddrMap *getRelocMap() const { return RelocMap; }
bool extract(DataExtractor debug_info, uint32_t* offset_ptr);
uint32_t extract(uint32_t offset, DataExtractor debug_info_data,
const DWARFAbbreviationDeclarationSet *abbrevs);
/// extractDIEsIfNeeded - Parses a compile unit and indexes its DIEs if it
/// hasn't already been done. Returns the number of DIEs parsed at this call.
size_t extractDIEsIfNeeded(bool CUDieOnly);
/// extractRangeList - extracts the range list referenced by this compile
/// unit from .debug_ranges section. Returns true on success.
/// Requires that compile unit is already extracted.
bool extractRangeList(uint32_t RangeListOffset,
DWARFDebugRangeList &RangeList) const;
void clear();
uint32_t getOffset() const { return Offset; }
/// Size in bytes of the compile unit header.
virtual uint32_t getSize() const { return 11; }
bool containsDIEOffset(uint32_t die_offset) const {
return die_offset >= getFirstDIEOffset() &&
die_offset < getNextUnitOffset();
}
uint32_t getFirstDIEOffset() const { return Offset + getSize(); }
uint32_t getNextUnitOffset() const { return Offset + Length + 4; }
/// Size in bytes of the .debug_info data associated with this compile unit.
size_t getDebugInfoSize() const { return Length + 4 - getSize(); }
uint32_t getLength() const { return Length; }
uint16_t getVersion() const { return Version; }
const DWARFAbbreviationDeclarationSet *getAbbreviations() const {
return Abbrevs;
}
uint8_t getAddressByteSize() const { return AddrSize; }
uint64_t getBaseAddress() const { return BaseAddr; }
void setBaseAddress(uint64_t base_addr) {
BaseAddr = base_addr;
}
const DWARFDebugInfoEntryMinimal *
getCompileUnitDIE(bool extract_cu_die_only = true) {
extractDIEsIfNeeded(extract_cu_die_only);
return DieArray.empty() ? NULL : &DieArray[0];
}
const char *getCompilationDir();
uint64_t getDWOId();
/// setDIERelations - We read in all of the DIE entries into our flat list
/// of DIE entries and now we need to go back through all of them and set the
/// parent, sibling and child pointers for quick DIE navigation.
void setDIERelations();
void buildAddressRangeTable(DWARFDebugAranges *debug_aranges,
bool clear_dies_if_already_not_parsed,
uint32_t CUOffsetInAranges);
/// getInlinedChainForAddress - fetches inlined chain for a given address.
/// Returns empty chain if there is no subprogram containing address. The
/// chain is valid as long as parsed compile unit DIEs are not cleared.
DWARFDebugInfoEntryInlinedChain getInlinedChainForAddress(uint64_t Address);
private:
/// extractDIEsToVector - Appends all parsed DIEs to a vector.
void extractDIEsToVector(bool AppendCUDie, bool AppendNonCUDIEs,
std::vector<DWARFDebugInfoEntryMinimal> &DIEs) const;
/// clearDIEs - Clear parsed DIEs to keep memory usage low.
void clearDIEs(bool KeepCUDie);
/// parseDWO - Parses .dwo file for current compile unit. Returns true if
/// it was actually constructed.
bool parseDWO();
/// getSubprogramForAddress - Returns subprogram DIE with address range
/// encompassing the provided address. The pointer is alive as long as parsed
/// compile unit DIEs are not cleared.
const DWARFDebugInfoEntryMinimal *getSubprogramForAddress(uint64_t Address);
};
}
#endif