static std::vector<std::pair<uint64_t, uint64_t>>
findX86PltEntries(uint64_t PltSectionVA, ArrayRef<uint8_t> PltContents,
uint64_t GotPltSectionVA) {
// Do a lightweight parsing of PLT entries.
std::vector<std::pair<uint64_t, uint64_t>> Result;
for (uint64_t Byte = 0, End = PltContents.size(); Byte + 6 < End; ) {
// Recognize a jmp.
if (PltContents[Byte] == 0xff && PltContents[Byte + 1] == 0xa3) {
// The jmp instruction at the beginning of each PLT entry jumps to the
// address of the base of the .got.plt section plus the immediate.
uint32_t Imm = support::endian::read32le(PltContents.data() + Byte + 2);
Result.push_back(
std::make_pair(PltSectionVA + Byte, GotPltSectionVA + Imm));
Byte += 6;
} else if (PltContents[Byte] == 0xff && PltContents[Byte + 1] == 0x25) {
// The jmp instruction at the beginning of each PLT entry jumps to the
// immediate.
uint32_t Imm = support::endian::read32le(PltContents.data() + Byte + 2);
Result.push_back(std::make_pair(PltSectionVA + Byte, Imm));
Byte += 6;
} else
Byte++;
}
return Result;
}
// Parses a given list of options.
opt::InputArgList ELFOptTable::parse(ArrayRef<const char *> Argv) {
// Make InputArgList from string vectors.
unsigned MissingIndex;
unsigned MissingCount;
SmallVector<const char *, 256> Vec(Argv.data(), Argv.data() + Argv.size());
// We need to get the quoting style for response files before parsing all
// options so we parse here before and ignore all the options but
// --rsp-quoting.
opt::InputArgList Args = this->ParseArgs(Vec, MissingIndex, MissingCount);
// Expand response files (arguments in the form of @<filename>)
// and then parse the argument again.
cl::ExpandResponseFiles(Saver, getQuotingStyle(Args), Vec);
Args = this->ParseArgs(Vec, MissingIndex, MissingCount);
// Interpret -color-diagnostics early so that error messages
// for unknown flags are colored.
Config->ColorDiagnostics = getColorDiagnostics(Args);
if (MissingCount)
error(Twine(Args.getArgString(MissingIndex)) + ": missing argument");
for (auto *Arg : Args.filtered(OPT_UNKNOWN))
error("unknown argument: " + Arg->getSpelling());
return Args;
}
bool SymbolTable::AtomMappingInfo::isEqual(const DefinedAtom * const l,
const DefinedAtom * const r) {
if (l == r)
return true;
if (l == getEmptyKey())
return false;
if (r == getEmptyKey())
return false;
if (l == getTombstoneKey())
return false;
if (r == getTombstoneKey())
return false;
if (l->contentType() != r->contentType())
return false;
if (l->size() != r->size())
return false;
if (l->sectionChoice() != r->sectionChoice())
return false;
if (l->sectionChoice() == DefinedAtom::sectionCustomRequired) {
if (!l->customSectionName().equals(r->customSectionName()))
return false;
}
ArrayRef<uint8_t> lc = l->rawContent();
ArrayRef<uint8_t> rc = r->rawContent();
return memcmp(lc.data(), rc.data(), lc.size()) == 0;
}
ErrorOr<const typename MipsELFFile<ELFT>::Elf_Mips_RegInfo *>
MipsELFFile<ELFT>::findRegInfoSec() const {
using namespace llvm::ELF;
if (const Elf_Shdr *sec = findSectionByType(SHT_MIPS_OPTIONS)) {
auto contents = this->getSectionContents(sec);
if (std::error_code ec = contents.getError())
return ec;
ArrayRef<uint8_t> raw = contents.get();
while (!raw.empty()) {
if (raw.size() < sizeof(Elf_Mips_Options))
return make_dynamic_error_code(
StringRef("Invalid size of MIPS_OPTIONS section"));
const auto *opt = reinterpret_cast<const Elf_Mips_Options *>(raw.data());
if (opt->kind == ODK_REGINFO)
return &opt->getRegInfo();
raw = raw.slice(opt->size);
}
} else if (const Elf_Shdr *sec = findSectionByType(SHT_MIPS_REGINFO)) {
auto contents = this->getSectionContents(sec);
if (std::error_code ec = contents.getError())
return ec;
ArrayRef<uint8_t> raw = contents.get();
if (raw.size() != sizeof(Elf_Mips_RegInfo))
return make_dynamic_error_code(
StringRef("Invalid size of MIPS_REGINFO section"));
return reinterpret_cast<const Elf_Mips_RegInfo *>(raw.data());
}
return nullptr;
}
Error MappedBlockStream::readLongestContiguousChunk(
uint32_t Offset, ArrayRef<uint8_t> &Buffer) const {
// Make sure we aren't trying to read beyond the end of the stream.
if (Offset >= StreamLayout.Length)
return make_error<MSFError>(msf_error_code::insufficient_buffer);
uint32_t First = Offset / BlockSize;
uint32_t Last = First;
while (Last < NumBlocks - 1) {
if (StreamLayout.Blocks[Last] != StreamLayout.Blocks[Last + 1] - 1)
break;
++Last;
}
uint32_t OffsetInFirstBlock = Offset % BlockSize;
uint32_t BytesFromFirstBlock = BlockSize - OffsetInFirstBlock;
uint32_t BlockSpan = Last - First + 1;
uint32_t ByteSpan = BytesFromFirstBlock + (BlockSpan - 1) * BlockSize;
ArrayRef<uint8_t> BlockData;
uint32_t MsfOffset = blockToOffset(StreamLayout.Blocks[First], BlockSize);
if (auto EC = MsfData.readBytes(MsfOffset, BlockSize, BlockData))
return EC;
BlockData = BlockData.drop_front(OffsetInFirstBlock);
Buffer = ArrayRef<uint8_t>(BlockData.data(), ByteSpan);
return Error::success();
}
error_code
MachOObjectFile::getSectionName(DataRefImpl Sec,
StringRef &Result) const {
ArrayRef<char> Raw = getSectionRawName(Sec);
Result = parseSegmentOrSectionName(Raw.data());
return object_error::success;
}
/// Compute the address map. The address map is an array of symbol offsets
/// sorted so that it can be binary searched by address.
static std::vector<ulittle32_t> computeAddrMap(ArrayRef<CVSymbol> Records) {
// Make a vector of pointers to the symbols so we can sort it by address.
// Also gather the symbol offsets while we're at it.
std::vector<PublicSym32> DeserializedPublics;
std::vector<std::pair<const CVSymbol *, const PublicSym32 *>> PublicsByAddr;
std::vector<uint32_t> SymOffsets;
DeserializedPublics.reserve(Records.size());
PublicsByAddr.reserve(Records.size());
SymOffsets.reserve(Records.size());
uint32_t SymOffset = 0;
for (const CVSymbol &Sym : Records) {
assert(Sym.kind() == SymbolKind::S_PUB32);
DeserializedPublics.push_back(
cantFail(SymbolDeserializer::deserializeAs<PublicSym32>(Sym)));
PublicsByAddr.emplace_back(&Sym, &DeserializedPublics.back());
SymOffsets.push_back(SymOffset);
SymOffset += Sym.length();
}
llvm::stable_sort(PublicsByAddr, comparePubSymByAddrAndName);
// Fill in the symbol offsets in the appropriate order.
std::vector<ulittle32_t> AddrMap;
AddrMap.reserve(Records.size());
for (auto &Sym : PublicsByAddr) {
ptrdiff_t Idx = std::distance(Records.data(), Sym.first);
assert(Idx >= 0 && size_t(Idx) < Records.size());
AddrMap.push_back(ulittle32_t(SymOffsets[Idx]));
}
return AddrMap;
}
static void writeCieFde(uint8_t *Buf, ArrayRef<uint8_t> D) {
memcpy(Buf, D.data(), D.size());
// Fix the size field. -4 since size does not include the size field itself.
const endianness E = ELFT::TargetEndianness;
write32<E>(Buf, alignTo(D.size(), sizeof(typename ELFT::uint)) - 4);
}
void Dumper::printData(const Context &Ctx) {
for (const auto &Section : Ctx.COFF.sections()) {
StringRef Name;
Section.getName(Name);
if (Name != ".pdata" && !Name.startswith(".pdata$"))
continue;
const coff_section *PData = Ctx.COFF.getCOFFSection(Section);
ArrayRef<uint8_t> Contents;
error(Ctx.COFF.getSectionContents(PData, Contents));
if (Contents.empty())
continue;
const RuntimeFunction *Entries =
reinterpret_cast<const RuntimeFunction *>(Contents.data());
const size_t Count = Contents.size() / sizeof(RuntimeFunction);
ArrayRef<RuntimeFunction> RuntimeFunctions(Entries, Count);
size_t Index = 0;
for (const auto &RF : RuntimeFunctions) {
printRuntimeFunction(Ctx, Ctx.COFF.getCOFFSection(Section),
Index * sizeof(RuntimeFunction), RF);
++Index;
}
}
}
// 伸長
std::vector<byte> uncompress(ArrayRef<byte> src, size_t uncompSize) {
// データを格納するバッファの確保
std::vector<byte> data;
data.resize(uncompSize);
// 初期化
z_stream zs = {};
zs.next_in = const_cast<byte*>(src.data()); // データは書き換えられない
zs.avail_in = static_cast<uInt>(src.size());
zs.next_out = &data[0];
zs.avail_out = data.size();
if(inflateInit2(&zs, -MAX_WBITS))
BELL_THROW(DeflateError, "Failed to initialize uncompress stream.");
// 伸長
int res = inflate(&zs, Z_FINISH);
data.resize(zs.total_out);
inflateEnd(&zs);
if(res != Z_STREAM_END)
BELL_THROW(DeflateError, "Failed to uncompress.");
return data;
}
// 圧縮
std::vector<byte> compress(ArrayRef<byte> src, int level) {
// レベルを[1, 9]にクリップ
level = clamp(level, 1, 9);
// データを格納するバッファの確保
std::vector<byte> data;
data.resize(compressBound(static_cast<uLong>(src.size())));
// 初期化
z_stream zs = {};
zs.next_in = const_cast<byte*>(src.data()); // データは書き換えられない
zs.avail_in = static_cast<uInt>(src.size());
zs.next_out = &data[0];
zs.avail_out = data.size();
if(deflateInit2(&zs, level, Z_DEFLATED, -MAX_WBITS, 8, Z_DEFAULT_STRATEGY))
BELL_THROW(DeflateError, "Failed to initialize compress stream.");
// 圧縮
int res = ::deflate(&zs, Z_FINISH);
data.resize(zs.total_out);
// 片付け
deflateEnd(&zs);
if(res != Z_STREAM_END)
BELL_THROW(DeflateError, "Failed to compress.");
return data;
}
static std::error_code getSymbolAuxData(const COFFObjectFile *Obj,
const coff_symbol *Symbol,
const T *&Aux) {
ArrayRef<uint8_t> AuxData = Obj->getSymbolAuxData(Symbol);
Aux = reinterpret_cast<const T*>(AuxData.data());
return readobj_error::success;
}
void MappedBlockStream::fixCacheAfterWrite(uint32_t Offset,
ArrayRef<uint8_t> Data) const {
// If this write overlapped a read which previously came from the pool,
// someone may still be holding a pointer to that alloc which is now invalid.
// Compute the overlapping range and update the cache entry, so any
// outstanding buffers are automatically updated.
for (const auto &MapEntry : CacheMap) {
// If the end of the written extent precedes the beginning of the cached
// extent, ignore this map entry.
if (Offset + Data.size() < MapEntry.first)
continue;
for (const auto &Alloc : MapEntry.second) {
// If the end of the cached extent precedes the beginning of the written
// extent, ignore this alloc.
if (MapEntry.first + Alloc.size() < Offset)
continue;
// If we get here, they are guaranteed to overlap.
Interval WriteInterval = std::make_pair(Offset, Offset + Data.size());
Interval CachedInterval =
std::make_pair(MapEntry.first, MapEntry.first + Alloc.size());
// If they overlap, we need to write the new data into the overlapping
// range.
auto Intersection = intersect(WriteInterval, CachedInterval);
assert(Intersection.first <= Intersection.second);
uint32_t Length = Intersection.second - Intersection.first;
uint32_t SrcOffset =
AbsoluteDifference(WriteInterval.first, Intersection.first);
uint32_t DestOffset =
AbsoluteDifference(CachedInterval.first, Intersection.first);
::memcpy(Alloc.data() + DestOffset, Data.data() + SrcOffset, Length);
}
}
}
Error MappedBlockStream::readBytes(uint32_t Offset,
MutableArrayRef<uint8_t> Buffer) const {
uint32_t BlockNum = Offset / BlockSize;
uint32_t OffsetInBlock = Offset % BlockSize;
// Make sure we aren't trying to read beyond the end of the stream.
if (Buffer.size() > StreamLayout.Length)
return make_error<MSFError>(msf_error_code::insufficient_buffer);
if (Offset > StreamLayout.Length - Buffer.size())
return make_error<MSFError>(msf_error_code::insufficient_buffer);
uint32_t BytesLeft = Buffer.size();
uint32_t BytesWritten = 0;
uint8_t *WriteBuffer = Buffer.data();
while (BytesLeft > 0) {
uint32_t StreamBlockAddr = StreamLayout.Blocks[BlockNum];
ArrayRef<uint8_t> BlockData;
uint32_t Offset = blockToOffset(StreamBlockAddr, BlockSize);
if (auto EC = MsfData.readBytes(Offset, BlockSize, BlockData))
return EC;
const uint8_t *ChunkStart = BlockData.data() + OffsetInBlock;
uint32_t BytesInChunk = std::min(BytesLeft, BlockSize - OffsetInBlock);
::memcpy(WriteBuffer + BytesWritten, ChunkStart, BytesInChunk);
BytesWritten += BytesInChunk;
BytesLeft -= BytesInChunk;
++BlockNum;
OffsetInBlock = 0;
}
return Error::success();
}
// Given the COFF object file, this function returns the relocations for .pdata
// and the pointer to "runtime function" structs.
static bool getPDataSection(const COFFObjectFile *Obj,
std::vector<RelocationRef> &Rels,
const RuntimeFunction *&RFStart, int &NumRFs) {
for (const SectionRef &Section : Obj->sections()) {
StringRef Name;
error(Section.getName(Name));
if (Name != ".pdata")
continue;
const coff_section *Pdata = Obj->getCOFFSection(Section);
for (const RelocationRef &Reloc : Section.relocations())
Rels.push_back(Reloc);
// Sort relocations by address.
std::sort(Rels.begin(), Rels.end(), RelocAddressLess);
ArrayRef<uint8_t> Contents;
error(Obj->getSectionContents(Pdata, Contents));
if (Contents.empty())
continue;
RFStart = reinterpret_cast<const RuntimeFunction *>(Contents.data());
NumRFs = Contents.size() / sizeof(RuntimeFunction);
return true;
}
return false;
}
void ObjectFile::initializeChunks() {
uint32_t NumSections = COFFObj->getNumberOfSections();
Chunks.reserve(NumSections);
SparseChunks.resize(NumSections + 1);
for (uint32_t I = 1; I < NumSections + 1; ++I) {
const coff_section *Sec;
StringRef Name;
std::error_code EC = COFFObj->getSection(I, Sec);
error(EC, Twine("getSection failed: ") + Name);
EC = COFFObj->getSectionName(Sec, Name);
error(EC, Twine("getSectionName failed: ") + Name);
if (Name == ".sxdata") {
SXData = Sec;
continue;
}
if (Name == ".drectve") {
ArrayRef<uint8_t> Data;
COFFObj->getSectionContents(Sec, Data);
Directives = std::string((const char *)Data.data(), Data.size());
continue;
}
// Skip non-DWARF debug info. MSVC linker converts the sections into
// a PDB file, but we don't support that.
if (Name == ".debug" || Name.startswith(".debug$"))
continue;
// We want to preserve DWARF debug sections only when /debug is on.
if (!Config->Debug && Name.startswith(".debug"))
continue;
if (Sec->Characteristics & llvm::COFF::IMAGE_SCN_LNK_REMOVE)
continue;
auto *C = new (Alloc) SectionChunk(this, Sec);
Chunks.push_back(C);
SparseChunks[I] = C;
}
}
void printSymbolVersionDefinition(const typename ELFT::Shdr &Shdr,
ArrayRef<uint8_t> Contents,
StringRef StrTab) {
outs() << "Version definitions:\n";
const uint8_t *Buf = Contents.data();
uint32_t VerdefIndex = 1;
// sh_info contains the number of entries in the SHT_GNU_verdef section. To
// make the index column have consistent width, we should insert blank spaces
// according to sh_info.
uint16_t VerdefIndexWidth = std::to_string(Shdr.sh_info).size();
while (Buf) {
auto *Verdef = reinterpret_cast<const typename ELFT::Verdef *>(Buf);
outs() << format_decimal(VerdefIndex++, VerdefIndexWidth) << " "
<< format("0x%02" PRIx16 " ", (uint16_t)Verdef->vd_flags)
<< format("0x%08" PRIx32 " ", (uint32_t)Verdef->vd_hash);
const uint8_t *BufAux = Buf + Verdef->vd_aux;
uint16_t VerdauxIndex = 0;
while (BufAux) {
auto *Verdaux = reinterpret_cast<const typename ELFT::Verdaux *>(BufAux);
if (VerdauxIndex)
outs() << std::string(VerdefIndexWidth + 17, ' ');
outs() << StringRef(StrTab.drop_front(Verdaux->vda_name).data()) << '\n';
BufAux = Verdaux->vda_next ? BufAux + Verdaux->vda_next : nullptr;
++VerdauxIndex;
}
Buf = Verdef->vd_next ? Buf + Verdef->vd_next : nullptr;
}
}
static void handleMethodOverloadList(ArrayRef<uint8_t> Content,
SmallVectorImpl<TiReference> &Refs) {
uint32_t Offset = 0;
while (!Content.empty()) {
// Array of:
// 0: Attrs
// 2: Padding
// 4: TypeIndex
// if (isIntroVirtual())
// 8: VFTableOffset
// At least 8 bytes are guaranteed. 4 extra bytes come iff function is an
// intro virtual.
uint32_t Len = 8;
uint16_t Attrs = support::endian::read16le(Content.data());
Refs.push_back({TiRefKind::TypeRef, Offset + 4, 1});
if (LLVM_UNLIKELY(isIntroVirtual(Attrs)))
Len += 4;
Offset += Len;
Content = Content.drop_front(Len);
}
}
Error MappedBlockStream::readLongestContiguousChunk(
uint32_t Offset, ArrayRef<uint8_t> &Buffer) const {
// Make sure we aren't trying to read beyond the end of the stream.
if (Offset >= Data->getLength())
return make_error<RawError>(raw_error_code::insufficient_buffer);
uint32_t First = Offset / Pdb.getBlockSize();
uint32_t Last = First;
auto BlockList = Data->getStreamBlocks();
while (Last < Pdb.getBlockCount() - 1) {
if (BlockList[Last] != BlockList[Last + 1] - 1)
break;
++Last;
}
uint32_t OffsetInFirstBlock = Offset % Pdb.getBlockSize();
uint32_t BytesFromFirstBlock = Pdb.getBlockSize() - OffsetInFirstBlock;
uint32_t BlockSpan = Last - First + 1;
uint32_t ByteSpan =
BytesFromFirstBlock + (BlockSpan - 1) * Pdb.getBlockSize();
Buffer = Pdb.getBlockData(BlockList[First], Pdb.getBlockSize());
Buffer = Buffer.drop_front(OffsetInFirstBlock);
Buffer = ArrayRef<uint8_t>(Buffer.data(), ByteSpan);
return Error::success();
}
DelayedDiagnostic
DelayedDiagnostic::makeAvailability(AvailabilityResult AR,
ArrayRef<SourceLocation> Locs,
const NamedDecl *ReferringDecl,
const NamedDecl *OffendingDecl,
const ObjCInterfaceDecl *UnknownObjCClass,
const ObjCPropertyDecl *ObjCProperty,
StringRef Msg,
bool ObjCPropertyAccess) {
assert(!Locs.empty());
DelayedDiagnostic DD;
DD.Kind = Availability;
DD.Triggered = false;
DD.Loc = Locs.front();
DD.AvailabilityData.ReferringDecl = ReferringDecl;
DD.AvailabilityData.OffendingDecl = OffendingDecl;
DD.AvailabilityData.UnknownObjCClass = UnknownObjCClass;
DD.AvailabilityData.ObjCProperty = ObjCProperty;
char *MessageData = nullptr;
if (!Msg.empty()) {
MessageData = new char [Msg.size()];
memcpy(MessageData, Msg.data(), Msg.size());
}
DD.AvailabilityData.Message = MessageData;
DD.AvailabilityData.MessageLen = Msg.size();
DD.AvailabilityData.SelectorLocs = new SourceLocation[Locs.size()];
memcpy(DD.AvailabilityData.SelectorLocs, Locs.data(),
sizeof(SourceLocation) * Locs.size());
DD.AvailabilityData.NumSelectorLocs = Locs.size();
DD.AvailabilityData.AR = AR;
DD.AvailabilityData.ObjCPropertyAccess = ObjCPropertyAccess;
return DD;
}
void llvm::codeview::discoverTypeIndices(ArrayRef<uint8_t> RecordData,
SmallVectorImpl<TiReference> &Refs) {
const RecordPrefix *P =
reinterpret_cast<const RecordPrefix *>(RecordData.data());
TypeLeafKind K = static_cast<TypeLeafKind>(uint16_t(P->RecordKind));
::discoverTypeIndices(RecordData.drop_front(sizeof(RecordPrefix)), K, Refs);
}
// When directly dumping the .debug_loc without a compile unit, we have to guess
// at the DWARF version. This only affects DW_OP_call_ref, which is a rare
// expression that LLVM doesn't produce. Guessing the wrong version means we
// won't be able to pretty print expressions in DWARF2 binaries produced by
// non-LLVM tools.
static void dumpExpression(raw_ostream &OS, ArrayRef<char> Data,
bool IsLittleEndian, unsigned AddressSize,
const MCRegisterInfo *MRI) {
DWARFDataExtractor Extractor(StringRef(Data.data(), Data.size()),
IsLittleEndian, AddressSize);
DWARFExpression(Extractor, AddressSize, dwarf::DWARF_VERSION).print(OS, MRI);
}
static void writeWithCommas(raw_ostream &S, ArrayRef<char> Buffer) {
assert(!Buffer.empty());
ArrayRef<char> ThisGroup;
int InitialDigits = ((Buffer.size() - 1) % 3) + 1;
ThisGroup = Buffer.take_front(InitialDigits);
S.write(ThisGroup.data(), ThisGroup.size());
Buffer = Buffer.drop_front(InitialDigits);
assert(Buffer.size() % 3 == 0);
while (!Buffer.empty()) {
S << ',';
ThisGroup = Buffer.take_front(3);
S.write(ThisGroup.data(), 3);
Buffer = Buffer.drop_front(3);
}
}
static std::error_code getSymbolAuxData(const COFFObjectFile *Obj,
COFFSymbolRef Symbol,
uint8_t AuxSymbolIdx, const T *&Aux) {
ArrayRef<uint8_t> AuxData = Obj->getSymbolAuxData(Symbol);
AuxData = AuxData.slice(AuxSymbolIdx * Obj->getSymbolTableEntrySize());
Aux = reinterpret_cast<const T*>(AuxData.data());
return readobj_error::success;
}
BraceStmt::BraceStmt(SourceLoc lbloc, ArrayRef<ASTNode> elts,
SourceLoc rbloc, Optional<bool> implicit)
: Stmt(StmtKind::Brace, getDefaultImplicitFlag(implicit, lbloc)),
NumElements(elts.size()), LBLoc(lbloc), RBLoc(rbloc)
{
memcpy(getElementsStorage(), elts.data(),
elts.size() * sizeof(ASTNode));
}
std::error_code COFFObjectFile::getSectionContents(DataRefImpl Ref,
StringRef &Result) const {
const coff_section *Sec = toSec(Ref);
ArrayRef<uint8_t> Res;
std::error_code EC = getSectionContents(Sec, Res);
Result = StringRef(reinterpret_cast<const char*>(Res.data()), Res.size());
return EC;
}
void ARMAttributeParser::Parse(ArrayRef<uint8_t> Section) {
size_t Offset = 1;
unsigned SectionNumber = 0;
while (Offset < Section.size()) {
uint32_t SectionLength =
*reinterpret_cast<const support::ulittle32_t*>(Section.data() + Offset);
SW.startLine() << "Section " << ++SectionNumber << " {\n";
SW.indent();
ParseSubsection(Section.data() + Offset, SectionLength);
Offset = Offset + SectionLength;
SW.unindent();
SW.startLine() << "}\n";
}
}
static ArrayRef<uint8_t> consumeDebugMagic(ArrayRef<uint8_t> Data,
StringRef SecName) {
// First 4 bytes are section magic.
if (Data.size() < 4)
fatal(SecName + " too short");
if (support::endian::read32le(Data.data()) != COFF::DEBUG_SECTION_MAGIC)
fatal(SecName + " has an invalid magic");
return Data.slice(4);
}
void APValue::MakeMemberPointer(const ValueDecl *Member, bool IsDerivedMember,
ArrayRef<const CXXRecordDecl*> Path) {
assert(isUninit() && "Bad state change");
MemberPointerData *MPD = new ((void*)(char*)Data.buffer) MemberPointerData;
Kind = MemberPointer;
MPD->MemberAndIsDerivedMember.setPointer(Member);
MPD->MemberAndIsDerivedMember.setInt(IsDerivedMember);
MPD->resizePath(Path.size());
memcpy(MPD->getPath(), Path.data(), Path.size()*sizeof(const CXXRecordDecl*));
}
static Error writeBytes(uint32_t Offset, ArrayRef<uint8_t> Src,
MutableArrayRef<uint8_t> Dest) {
if (Dest.size() < Src.size())
return make_error<CodeViewError>(cv_error_code::insufficient_buffer);
if (Offset > Src.size() - Dest.size())
return make_error<CodeViewError>(cv_error_code::insufficient_buffer);
::memcpy(Dest.data() + Offset, Src.data(), Src.size());
return Error::success();
}