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Make ObjectFile and BitcodeReader always own the MemoryBuffer.

Browse Source 
This allows us to just use a std::unique_ptr to store the pointer to the buffer.
The flip side is that they have to support releasing the buffer back to the
caller.

Overall this looks like a more efficient and less brittle api.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@211542 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Rafael Espindola 2014-06-23 21:53:12 +00:00
parent 7e7e89f178
commit 1f659329b6
23 changed files with 117 additions and 154 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
include/llvm/Bitcode/ReaderWriter.h
View File

@ -30,8 +30,7 @@ namespace llvm {
/// deserialization of function bodies. If successful, this takes ownership
/// of 'buffer. On error, this *does not* take ownership of Buffer.
ErrorOr<Module *> getLazyBitcodeModule(MemoryBuffer *Buffer,
LLVMContext &Context,
bool BufferOwned = true);
LLVMContext &Context);
/// getStreamedBitcodeModule - Read the header of the specified stream
/// and prepare for lazy deserialization and streaming of function bodies.

2
include/llvm/IR/GVMaterializer.h
View File

@ -54,6 +54,8 @@ public:
/// Make sure the entire Module has been completely read.
///
virtual std::error_code MaterializeModule(Module *M) = 0;
virtual void releaseBuffer() = 0;
};
} // End llvm namespace

2
include/llvm/IR/Module.h
View File

@ -458,7 +458,7 @@ public:
/// Make sure all GlobalValues in this Module are fully read and clear the
/// Materializer. If the module is corrupt, this DOES NOT clear the old
/// Materializer.
std::error_code materializeAllPermanently();
std::error_code materializeAllPermanently(bool ReleaseBuffer = false);
/// @}
/// @name Direct access to the globals list, functions list, and symbol table

6
include/llvm/Object/Binary.h
View File

@ -32,12 +32,11 @@ private:
Binary(const Binary &other) LLVM_DELETED_FUNCTION;
unsigned int TypeID;
bool BufferOwned;
protected:
MemoryBuffer *Data;
std::unique_ptr<MemoryBuffer> Data;
Binary(unsigned int Type, MemoryBuffer *Source, bool BufferOwned = true);
Binary(unsigned int Type, MemoryBuffer *Source);
enum {
ID_Archive,
@ -79,6 +78,7 @@ public:
virtual ~Binary();
StringRef getData() const;
MemoryBuffer *releaseBuffer() { return Data.release(); }
StringRef getFileName() const;
// Cast methods.

3
include/llvm/Object/COFF.h
View File

@ -420,8 +420,7 @@ protected:
StringRef &Result) const override;
public:
COFFObjectFile(MemoryBuffer *Object, std::error_code &EC,
bool BufferOwned = true);
COFFObjectFile(MemoryBuffer *Object, std::error_code &EC);
basic_symbol_iterator symbol_begin_impl() const override;
basic_symbol_iterator symbol_end_impl() const override;
library_iterator needed_library_begin() const override;

8
include/llvm/Object/ELFObjectFile.h
View File

@ -177,8 +177,7 @@ protected:
bool isDyldELFObject;
public:
ELFObjectFile(MemoryBuffer *Object, std::error_code &EC,
bool BufferOwned = true);
ELFObjectFile(MemoryBuffer *Object, std::error_code &EC);
const Elf_Sym *getSymbol(DataRefImpl Symb) const;
@ -774,12 +773,11 @@ ELFObjectFile<ELFT>::getRela(DataRefImpl Rela) const {
}
template <class ELFT>
ELFObjectFile<ELFT>::ELFObjectFile(MemoryBuffer *Object, std::error_code &ec,
bool BufferOwned)
ELFObjectFile<ELFT>::ELFObjectFile(MemoryBuffer *Object, std::error_code &ec)
: ObjectFile(getELFType(static_cast<endianness>(ELFT::TargetEndianness) ==
support::little,
ELFT::Is64Bits),
Object, BufferOwned),
Object),
EF(Object, ec) {}
template <class ELFT>

4
include/llvm/Object/IRObjectFile.h
View File

@ -27,8 +27,8 @@ class IRObjectFile : public SymbolicFile {
std::unique_ptr<Mangler> Mang;
public:
IRObjectFile(MemoryBuffer *Object, std::error_code &EC, LLVMContext &Context,
bool BufferOwned);
IRObjectFile(MemoryBuffer *Object, std::error_code &EC, LLVMContext &Context);
~IRObjectFile();
void moveSymbolNext(DataRefImpl &Symb) const override;
std::error_code printSymbolName(raw_ostream &OS,
DataRefImpl Symb) const override;

2
include/llvm/Object/MachO.h
View File

@ -57,7 +57,7 @@ public:
};
MachOObjectFile(MemoryBuffer *Object, bool IsLittleEndian, bool Is64Bits,
std::error_code &EC, bool BufferOwned = true);
std::error_code &EC);
void moveSymbolNext(DataRefImpl &Symb) const override;
std::error_code getSymbolName(DataRefImpl Symb,

14
include/llvm/Object/ObjectFile.h
View File

@ -208,7 +208,7 @@ class ObjectFile : public SymbolicFile {
ObjectFile(const ObjectFile &other) LLVM_DELETED_FUNCTION;
protected:
ObjectFile(unsigned int Type, MemoryBuffer *Source, bool BufferOwned = true);
ObjectFile(unsigned int Type, MemoryBuffer *Source);
const uint8_t *base() const {
return reinterpret_cast<const uint8_t *>(Data->getBufferStart());
@ -334,10 +334,9 @@ public:
/// @brief Create ObjectFile from path.
static ErrorOr<ObjectFile *> createObjectFile(StringRef ObjectPath);
static ErrorOr<ObjectFile *> createObjectFile(MemoryBuffer *Object,
bool BufferOwned,
sys::fs::file_magic Type);
static ErrorOr<ObjectFile *> createObjectFile(MemoryBuffer *Object) {
return createObjectFile(Object, true, sys::fs::file_magic::unknown);
return createObjectFile(Object, sys::fs::file_magic::unknown);
}
@ -346,12 +345,9 @@ public:
}
public:
static ErrorOr<ObjectFile *> createCOFFObjectFile(MemoryBuffer *Object,
bool BufferOwned = true);
static ErrorOr<ObjectFile *> createELFObjectFile(MemoryBuffer *Object,
bool BufferOwned = true);
static ErrorOr<ObjectFile *> createMachOObjectFile(MemoryBuffer *Object,
bool BufferOwned = true);
static ErrorOr<ObjectFile *> createCOFFObjectFile(MemoryBuffer *Object);
static ErrorOr<ObjectFile *> createELFObjectFile(MemoryBuffer *Object);
static ErrorOr<ObjectFile *> createMachOObjectFile(MemoryBuffer *Object);
};
// Inline function definitions.

9
include/llvm/Object/SymbolicFile.h
View File

@ -115,7 +115,7 @@ const uint64_t UnknownAddressOrSize = ~0ULL;
class SymbolicFile : public Binary {
public:
virtual ~SymbolicFile();
SymbolicFile(unsigned int Type, MemoryBuffer *Source, bool BufferOwned);
SymbolicFile(unsigned int Type, MemoryBuffer *Source);
// virtual interface.
virtual void moveSymbolNext(DataRefImpl &Symb) const = 0;
@ -143,17 +143,14 @@ public:
// construction aux.
static ErrorOr<SymbolicFile *> createIRObjectFile(MemoryBuffer *Object,
LLVMContext &Context,
bool BufferOwned = true);
LLVMContext &Context);
static ErrorOr<SymbolicFile *> createSymbolicFile(MemoryBuffer *Object,
bool BufferOwned,
sys::fs::file_magic Type,
LLVMContext *Context);
static ErrorOr<SymbolicFile *> createSymbolicFile(MemoryBuffer *Object) {
return createSymbolicFile(Object, true, sys::fs::file_magic::unknown,
nullptr);
return createSymbolicFile(Object, sys::fs::file_magic::unknown, nullptr);
}
static ErrorOr<SymbolicFile *> createSymbolicFile(StringRef ObjectPath);

16
lib/Bitcode/Reader/BitcodeReader.cpp
View File

@ -39,8 +39,6 @@ void BitcodeReader::materializeForwardReferencedFunctions() {
}
void BitcodeReader::FreeState() {
if (BufferOwned)
delete Buffer;
Buffer = nullptr;
std::vector<Type*>().swap(TypeList);
ValueList.clear();
@ -3150,6 +3148,7 @@ std::error_code BitcodeReader::FindFunctionInStream(
// GVMaterializer implementation
//===----------------------------------------------------------------------===//
void BitcodeReader::releaseBuffer() { Buffer.release(); }
bool BitcodeReader::isMaterializable(const GlobalValue *GV) const {
if (const Function *F = dyn_cast<Function>(GV)) {
@ -3374,10 +3373,9 @@ const std::error_category &BitcodeReader::BitcodeErrorCategory() {
/// getLazyBitcodeModule - lazy function-at-a-time loading from a file.
///
ErrorOr<Module *> llvm::getLazyBitcodeModule(MemoryBuffer *Buffer,
LLVMContext &Context,
bool BufferOwned) {
LLVMContext &Context) {
Module *M = new Module(Buffer->getBufferIdentifier(), Context);
BitcodeReader *R = new BitcodeReader(Buffer, Context, BufferOwned);
BitcodeReader *R = new BitcodeReader(Buffer, Context);
M->setMaterializer(R);
if (std::error_code EC = R->ParseBitcodeInto(M)) {
R->releaseBuffer(); // Never take ownership on error.
@ -3409,13 +3407,12 @@ Module *llvm::getStreamedBitcodeModule(const std::string &name,
ErrorOr<Module *> llvm::parseBitcodeFile(MemoryBuffer *Buffer,
LLVMContext &Context) {
ErrorOr<Module *> ModuleOrErr = getLazyBitcodeModule(Buffer, Context, false);
ErrorOr<Module *> ModuleOrErr = getLazyBitcodeModule(Buffer, Context);
if (!ModuleOrErr)
return ModuleOrErr;
Module *M = ModuleOrErr.get();
// Read in the entire module, and destroy the BitcodeReader.
if (std::error_code EC = M->materializeAllPermanently()) {
if (std::error_code EC = M->materializeAllPermanently(true)) {
delete M;
return EC;
}
@ -3429,13 +3426,14 @@ ErrorOr<Module *> llvm::parseBitcodeFile(MemoryBuffer *Buffer,
std::string llvm::getBitcodeTargetTriple(MemoryBuffer *Buffer,
LLVMContext& Context,
std::string *ErrMsg) {
BitcodeReader *R = new BitcodeReader(Buffer, Context, /*BufferOwned*/ false);
BitcodeReader *R = new BitcodeReader(Buffer, Context);
std::string Triple("");
if (std::error_code EC = R->ParseTriple(Triple))
if (ErrMsg)
*ErrMsg = EC.message();
R->releaseBuffer();
delete R;
return Triple;
}

23
lib/Bitcode/Reader/BitcodeReader.h
View File

@ -125,8 +125,7 @@ public:
class BitcodeReader : public GVMaterializer {
LLVMContext &Context;
Module *TheModule;
MemoryBuffer *Buffer;
bool BufferOwned;
std::unique_ptr<MemoryBuffer> Buffer;
std::unique_ptr<BitstreamReader> StreamFile;
BitstreamCursor Stream;
DataStreamer *LazyStreamer;
@ -223,25 +222,21 @@ public:
return std::error_code(E, BitcodeErrorCategory());
}
explicit BitcodeReader(MemoryBuffer *buffer, LLVMContext &C, bool BufferOwned)
: Context(C), TheModule(nullptr), Buffer(buffer),
BufferOwned(BufferOwned), LazyStreamer(nullptr), NextUnreadBit(0),
SeenValueSymbolTable(false), ValueList(C), MDValueList(C),
SeenFirstFunctionBody(false), UseRelativeIDs(false) {}
explicit BitcodeReader(MemoryBuffer *buffer, LLVMContext &C)
: Context(C), TheModule(nullptr), Buffer(buffer), LazyStreamer(nullptr),
NextUnreadBit(0), SeenValueSymbolTable(false), ValueList(C),
MDValueList(C), SeenFirstFunctionBody(false), UseRelativeIDs(false) {}
explicit BitcodeReader(DataStreamer *streamer, LLVMContext &C)
: Context(C), TheModule(nullptr), Buffer(nullptr), BufferOwned(false),
LazyStreamer(streamer), NextUnreadBit(0), SeenValueSymbolTable(false),
ValueList(C), MDValueList(C), SeenFirstFunctionBody(false),
UseRelativeIDs(false) {}
: Context(C), TheModule(nullptr), Buffer(nullptr), LazyStreamer(streamer),
NextUnreadBit(0), SeenValueSymbolTable(false), ValueList(C),
MDValueList(C), SeenFirstFunctionBody(false), UseRelativeIDs(false) {}
~BitcodeReader() { FreeState(); }
void materializeForwardReferencedFunctions();
void FreeState();
void releaseBuffer() {
Buffer = nullptr;
}
void releaseBuffer() override;
bool isMaterializable(const GlobalValue *GV) const override;
bool isDematerializable(const GlobalValue *GV) const override;

5
lib/IR/Module.cpp
View File

@ -400,10 +400,13 @@ std::error_code Module::materializeAll() {
return Materializer->MaterializeModule(this);
}
std::error_code Module::materializeAllPermanently() {
std::error_code Module::materializeAllPermanently(bool ReleaseBuffer) {
if (std::error_code EC = materializeAll())
return EC;
if (ReleaseBuffer)
Materializer->releaseBuffer();
Materializer.reset();
return std::error_code();
}

7
lib/Object/Archive.cpp
View File

@ -181,7 +181,12 @@ Archive::Child::getAsBinary(LLVMContext *Context) const {
ErrorOr<std::unique_ptr<MemoryBuffer>> BuffOrErr = getMemoryBuffer();
if (std::error_code EC = BuffOrErr.getError())
return EC;
return createBinary(BuffOrErr.get().release(), Context);
std::unique_ptr<MemoryBuffer> Buff(BuffOrErr.get().release());
ErrorOr<std::unique_ptr<Binary>> Ret = createBinary(Buff.get(), Context);
if (!Ret.getError())
Buff.release();
return Ret;
}
ErrorOr<Archive*> Archive::create(MemoryBuffer *Source) {

21
lib/Object/Binary.cpp
View File

@ -25,13 +25,10 @@
using namespace llvm;
using namespace object;
Binary::~Binary() {
if (BufferOwned)
delete Data;
}
Binary::~Binary() {}
Binary::Binary(unsigned int Type, MemoryBuffer *Source, bool BufferOwned)
: TypeID(Type), BufferOwned(BufferOwned), Data(Source) {}
Binary::Binary(unsigned int Type, MemoryBuffer *Source)
: TypeID(Type), Data(Source) {}
StringRef Binary::getData() const {
return Data->getBuffer();
@ -41,14 +38,13 @@ StringRef Binary::getFileName() const {
return Data->getBufferIdentifier();
}
ErrorOr<Binary *> object::createBinary(MemoryBuffer *Source,
ErrorOr<Binary *> object::createBinary(MemoryBuffer *Buffer,
LLVMContext *Context) {
std::unique_ptr<MemoryBuffer> scopedSource(Source);
sys::fs::file_magic Type = sys::fs::identify_magic(Source->getBuffer());
sys::fs::file_magic Type = sys::fs::identify_magic(Buffer->getBuffer());
switch (Type) {
case sys::fs::file_magic::archive:
return Archive::create(scopedSource.release());
return Archive::create(Buffer);
case sys::fs::file_magic::elf_relocatable:
case sys::fs::file_magic::elf_executable:
case sys::fs::file_magic::elf_shared_object:
@ -67,10 +63,9 @@ ErrorOr<Binary *> object::createBinary(MemoryBuffer *Source,
case sys::fs::file_magic::coff_import_library:
case sys::fs::file_magic::pecoff_executable:
case sys::fs::file_magic::bitcode:
return ObjectFile::createSymbolicFile(scopedSource.release(), true, Type,
Context);
return ObjectFile::createSymbolicFile(Buffer, Type, Context);
case sys::fs::file_magic::macho_universal_binary:
return MachOUniversalBinary::create(scopedSource.release());
return MachOUniversalBinary::create(Buffer);
case sys::fs::file_magic::unknown:
case sys::fs::file_magic::windows_resource:
// Unrecognized object file format.

43
lib/Object/COFFObjectFile.cpp
View File

@ -31,9 +31,9 @@ using support::ulittle32_t;
using support::little16_t;
// Returns false if size is greater than the buffer size. And sets ec.
static bool checkSize(const MemoryBuffer *M, std::error_code &EC,
static bool checkSize(const MemoryBuffer &M, std::error_code &EC,
uint64_t Size) {
if (M->getBufferSize() < Size) {
if (M.getBufferSize() < Size) {
EC = object_error::unexpected_eof;
return false;
}
@ -43,13 +43,12 @@ static bool checkSize(const MemoryBuffer *M, std::error_code &EC,
// Sets Obj unless any bytes in [addr, addr + size) fall outsize of m.
// Returns unexpected_eof if error.
template <typename T>
static std::error_code getObject(const T *&Obj, const MemoryBuffer *M,
static std::error_code getObject(const T *&Obj, const MemoryBuffer &M,
const uint8_t *Ptr,
const size_t Size = sizeof(T)) {
uintptr_t Addr = uintptr_t(Ptr);
if (Addr + Size < Addr ||
Addr + Size < Size ||
Addr + Size > uintptr_t(M->getBufferEnd())) {
if (Addr + Size < Addr || Addr + Size < Size ||
Addr + Size > uintptr_t(M.getBufferEnd())) {
return object_error::unexpected_eof;
}
Obj = reinterpret_cast<const T *>(Addr);
@ -398,7 +397,7 @@ relocation_iterator COFFObjectFile::section_rel_end(DataRefImpl Ref) const {
// Initialize the pointer to the symbol table.
std::error_code COFFObjectFile::initSymbolTablePtr() {
if (std::error_code EC = getObject(
SymbolTable, Data, base() + COFFHeader->PointerToSymbolTable,
SymbolTable, *Data, base() + COFFHeader->PointerToSymbolTable,
COFFHeader->NumberOfSymbols * sizeof(coff_symbol)))
return EC;
@ -409,11 +408,12 @@ std::error_code COFFObjectFile::initSymbolTablePtr() {
base() + COFFHeader->PointerToSymbolTable +
COFFHeader->NumberOfSymbols * sizeof(coff_symbol);
const ulittle32_t *StringTableSizePtr;
if (std::error_code EC = getObject(StringTableSizePtr, Data, StringTableAddr))
if (std::error_code EC =
getObject(StringTableSizePtr, *Data, StringTableAddr))
return EC;
StringTableSize = *StringTableSizePtr;
if (std::error_code EC =
getObject(StringTable, Data, StringTableAddr, StringTableSize))
getObject(StringTable, *Data, StringTableAddr, StringTableSize))
return EC;
// Treat table sizes < 4 as empty because contrary to the PECOFF spec, some
@ -511,15 +511,15 @@ std::error_code COFFObjectFile::initExportTablePtr() {
return object_error::success;
}
COFFObjectFile::COFFObjectFile(MemoryBuffer *Object, std::error_code &EC,
bool BufferOwned)
: ObjectFile(Binary::ID_COFF, Object, BufferOwned), COFFHeader(nullptr),
COFFObjectFile::COFFObjectFile(MemoryBuffer *Object, std::error_code &EC)
: ObjectFile(Binary::ID_COFF, Object), COFFHeader(nullptr),
PE32Header(nullptr), PE32PlusHeader(nullptr), DataDirectory(nullptr),
SectionTable(nullptr), SymbolTable(nullptr), StringTable(nullptr),
StringTableSize(0), ImportDirectory(nullptr), NumberOfImportDirectory(0),
ExportDirectory(nullptr) {
// Check that we at least have enough room for a header.
if (!checkSize(Data, EC, sizeof(coff_file_header))) return;
if (!checkSize(*Data, EC, sizeof(coff_file_header)))
return;
// The current location in the file where we are looking at.
uint64_t CurPtr = 0;
@ -532,7 +532,8 @@ COFFObjectFile::COFFObjectFile(MemoryBuffer *Object, std::error_code &EC,
if (base()[0] == 0x4d && base()[1] == 0x5a) {
// PE/COFF, seek through MS-DOS compatibility stub and 4-byte
// PE signature to find 'normal' COFF header.
if (!checkSize(Data, EC, 0x3c + 8)) return;
if (!checkSize(*Data, EC, 0x3c + 8))
return;
CurPtr = *reinterpret_cast<const ulittle16_t *>(base() + 0x3c);
// Check the PE magic bytes. ("PE\0\0")
if (std::memcmp(base() + CurPtr, "PE\0\0", 4) != 0) {
@ -543,13 +544,13 @@ COFFObjectFile::COFFObjectFile(MemoryBuffer *Object, std::error_code &EC,
HasPEHeader = true;
}
if ((EC = getObject(COFFHeader, Data, base() + CurPtr)))
if ((EC = getObject(COFFHeader, *Data, base() + CurPtr)))
return;
CurPtr += sizeof(coff_file_header);
if (HasPEHeader) {
const pe32_header *Header;
if ((EC = getObject(Header, Data, base() + CurPtr)))
if ((EC = getObject(Header, *Data, base() + CurPtr)))
return;
const uint8_t *DataDirAddr;
@ -567,7 +568,7 @@ COFFObjectFile::COFFObjectFile(MemoryBuffer *Object, std::error_code &EC,
EC = object_error::parse_failed;
return;
}
if ((EC = getObject(DataDirectory, Data, DataDirAddr, DataDirSize)))
if ((EC = getObject(DataDirectory, *Data, DataDirAddr, DataDirSize)))
return;
CurPtr += COFFHeader->SizeOfOptionalHeader;
}
@ -575,7 +576,7 @@ COFFObjectFile::COFFObjectFile(MemoryBuffer *Object, std::error_code &EC,
if (COFFHeader->isImportLibrary())
return;
if ((EC = getObject(SectionTable, Data, base() + CurPtr,
if ((EC = getObject(SectionTable, *Data, base() + CurPtr,
COFFHeader->NumberOfSections * sizeof(coff_section))))
return;
@ -1110,11 +1111,9 @@ ExportDirectoryEntryRef::getSymbolName(StringRef &Result) const {
return object_error::success;
}
ErrorOr<ObjectFile *> ObjectFile::createCOFFObjectFile(MemoryBuffer *Object,
bool BufferOwned) {
ErrorOr<ObjectFile *> ObjectFile::createCOFFObjectFile(MemoryBuffer *Object) {
std::error_code EC;
std::unique_ptr<COFFObjectFile> Ret(
new COFFObjectFile(Object, EC, BufferOwned));
std::unique_ptr<COFFObjectFile> Ret(new COFFObjectFile(Object, EC));
if (EC)
return EC;
return Ret.release();

35
lib/Object/ELFObjectFile.cpp
View File

@ -17,8 +17,7 @@
namespace llvm {
using namespace object;
static ErrorOr<ObjectFile *> createELFObjectFileAux(MemoryBuffer *Obj,
bool BufferOwned) {
ErrorOr<ObjectFile *> ObjectFile::createELFObjectFile(MemoryBuffer *Obj) {
std::pair<unsigned char, unsigned char> Ident = getElfArchType(Obj);
std::size_t MaxAlignment =
1ULL << countTrailingZeros(uintptr_t(Obj->getBufferStart()));
@ -28,49 +27,41 @@ static ErrorOr<ObjectFile *> createELFObjectFileAux(MemoryBuffer *Obj,
if (Ident.first == ELF::ELFCLASS32 && Ident.second == ELF::ELFDATA2LSB)
#if !LLVM_IS_UNALIGNED_ACCESS_FAST
if (MaxAlignment >= 4)
R.reset(new ELFObjectFile<ELFType<support::little, 4, false> >(
Obj, EC, BufferOwned));
R.reset(new ELFObjectFile<ELFType<support::little, 4, false>>(Obj, EC));
else
#endif
if (MaxAlignment >= 2)
R.reset(new ELFObjectFile<ELFType<support::little, 2, false> >(
Obj, EC, BufferOwned));
R.reset(new ELFObjectFile<ELFType<support::little, 2, false>>(Obj, EC));
else
return object_error::parse_failed;
else if (Ident.first == ELF::ELFCLASS32 && Ident.second == ELF::ELFDATA2MSB)
#if !LLVM_IS_UNALIGNED_ACCESS_FAST
if (MaxAlignment >= 4)
R.reset(new ELFObjectFile<ELFType<support::big, 4, false> >(Obj, EC,
BufferOwned));
R.reset(new ELFObjectFile<ELFType<support::big, 4, false>>(Obj, EC));
else
#endif
if (MaxAlignment >= 2)
R.reset(new ELFObjectFile<ELFType<support::big, 2, false> >(Obj, EC,
BufferOwned));
R.reset(new ELFObjectFile<ELFType<support::big, 2, false>>(Obj, EC));
else
return object_error::parse_failed;
else if (Ident.first == ELF::ELFCLASS64 && Ident.second == ELF::ELFDATA2MSB)
#if !LLVM_IS_UNALIGNED_ACCESS_FAST
if (MaxAlignment >= 8)
R.reset(new ELFObjectFile<ELFType<support::big, 8, true> >(Obj, EC,
BufferOwned));
R.reset(new ELFObjectFile<ELFType<support::big, 8, true>>(Obj, EC));
else
#endif
if (MaxAlignment >= 2)
R.reset(new ELFObjectFile<ELFType<support::big, 2, true> >(Obj, EC,
BufferOwned));
R.reset(new ELFObjectFile<ELFType<support::big, 2, true>>(Obj, EC));
else
return object_error::parse_failed;
else if (Ident.first == ELF::ELFCLASS64 && Ident.second == ELF::ELFDATA2LSB) {
#if !LLVM_IS_UNALIGNED_ACCESS_FAST
if (MaxAlignment >= 8)
R.reset(new ELFObjectFile<ELFType<support::little, 8, true> >(
Obj, EC, BufferOwned));
R.reset(new ELFObjectFile<ELFType<support::little, 8, true>>(Obj, EC));
else
#endif
if (MaxAlignment >= 2)
R.reset(new ELFObjectFile<ELFType<support::little, 2, true> >(
Obj, EC, BufferOwned));
R.reset(new ELFObjectFile<ELFType<support::little, 2, true>>(Obj, EC));
else
return object_error::parse_failed;
}
@ -82,12 +73,4 @@ static ErrorOr<ObjectFile *> createELFObjectFileAux(MemoryBuffer *Obj,
return R.release();
}
ErrorOr<ObjectFile *> ObjectFile::createELFObjectFile(MemoryBuffer *Obj,
bool BufferOwned) {
ErrorOr<ObjectFile *> Ret = createELFObjectFileAux(Obj, BufferOwned);
if (BufferOwned && Ret.getError())
delete Obj;
return Ret;
}
} // end namespace llvm

18
lib/Object/IRObjectFile.cpp
View File

@ -13,6 +13,7 @@
#include "llvm/Bitcode/ReaderWriter.h"
#include "llvm/IR/LLVMContext.h"
#include "llvm/IR/GVMaterializer.h"
#include "llvm/IR/Mangler.h"
#include "llvm/IR/Module.h"
#include "llvm/Object/IRObjectFile.h"
@ -21,10 +22,9 @@ using namespace llvm;
using namespace object;
IRObjectFile::IRObjectFile(MemoryBuffer *Object, std::error_code &EC,
LLVMContext &Context, bool BufferOwned)
: SymbolicFile(Binary::ID_IR, Object, BufferOwned) {
ErrorOr<Module *> MOrErr =
getLazyBitcodeModule(Object, Context, /*BufferOwned*/ false);
LLVMContext &Context)
: SymbolicFile(Binary::ID_IR, Object) {
ErrorOr<Module *> MOrErr = getLazyBitcodeModule(Object, Context);
if ((EC = MOrErr.getError()))
return;
@ -38,6 +38,8 @@ IRObjectFile::IRObjectFile(MemoryBuffer *Object, std::error_code &EC,
Mang.reset(new Mangler(DL));
}
IRObjectFile::~IRObjectFile() { M->getMaterializer()->releaseBuffer(); }
static const GlobalValue &getGV(DataRefImpl &Symb) {
return *reinterpret_cast<GlobalValue*>(Symb.p & ~uintptr_t(3));
}
@ -151,11 +153,11 @@ basic_symbol_iterator IRObjectFile::symbol_end_impl() const {
return basic_symbol_iterator(BasicSymbolRef(Ret, this));
}
ErrorOr<SymbolicFile *> llvm::object::SymbolicFile::createIRObjectFile(
MemoryBuffer *Object, LLVMContext &Context, bool BufferOwned) {
ErrorOr<SymbolicFile *>
llvm::object::SymbolicFile::createIRObjectFile(MemoryBuffer *Object,
LLVMContext &Context) {
std::error_code EC;
std::unique_ptr<IRObjectFile> Ret(
new IRObjectFile(Object, EC, Context, BufferOwned));
std::unique_ptr<IRObjectFile> Ret(new IRObjectFile(Object, EC, Context));
if (EC)
return EC;
return Ret.release();

16
lib/Object/MachOObjectFile.cpp
View File

@ -423,9 +423,8 @@ static uint32_t getSectionFlags(const MachOObjectFile *O,
}
MachOObjectFile::MachOObjectFile(MemoryBuffer *Object, bool IsLittleEndian,
bool Is64bits, std::error_code &EC,
bool BufferOwned)
: ObjectFile(getMachOType(IsLittleEndian, Is64bits), Object, BufferOwned),
bool Is64bits, std::error_code &EC)
: ObjectFile(getMachOType(IsLittleEndian, Is64bits), Object),
SymtabLoadCmd(nullptr), DysymtabLoadCmd(nullptr),
DataInCodeLoadCmd(nullptr) {
uint32_t LoadCommandCount = this->getHeader().ncmds;
@ -1812,19 +1811,18 @@ void MachOObjectFile::ReadULEB128s(uint64_t Index,
}
}
ErrorOr<ObjectFile *> ObjectFile::createMachOObjectFile(MemoryBuffer *Buffer,
bool BufferOwned) {
ErrorOr<ObjectFile *> ObjectFile::createMachOObjectFile(MemoryBuffer *Buffer) {
StringRef Magic = Buffer->getBuffer().slice(0, 4);
std::error_code EC;
std::unique_ptr<MachOObjectFile> Ret;
if (Magic == "\xFE\xED\xFA\xCE")
Ret.reset(new MachOObjectFile(Buffer, false, false, EC, BufferOwned));
Ret.reset(new MachOObjectFile(Buffer, false, false, EC));
else if (Magic == "\xCE\xFA\xED\xFE")
Ret.reset(new MachOObjectFile(Buffer, true, false, EC, BufferOwned));
Ret.reset(new MachOObjectFile(Buffer, true, false, EC));
else if (Magic == "\xFE\xED\xFA\xCF")
Ret.reset(new MachOObjectFile(Buffer, false, true, EC, BufferOwned));
Ret.reset(new MachOObjectFile(Buffer, false, true, EC));
else if (Magic == "\xCF\xFA\xED\xFE")
Ret.reset(new MachOObjectFile(Buffer, true, true, EC, BufferOwned));
Ret.reset(new MachOObjectFile(Buffer, true, true, EC));
else {
delete Buffer;
return object_error::parse_failed;

14
lib/Object/ObjectFile.cpp
View File

@ -23,9 +23,8 @@ using namespace object;
void ObjectFile::anchor() { }
ObjectFile::ObjectFile(unsigned int Type, MemoryBuffer *Source,
bool BufferOwned)
: SymbolicFile(Type, Source, BufferOwned) {}
ObjectFile::ObjectFile(unsigned int Type, MemoryBuffer *Source)
: SymbolicFile(Type, Source) {}
std::error_code ObjectFile::printSymbolName(raw_ostream &OS,
DataRefImpl Symb) const {
@ -47,7 +46,6 @@ section_iterator ObjectFile::getRelocatedSection(DataRefImpl Sec) const {
}
ErrorOr<ObjectFile *> ObjectFile::createObjectFile(MemoryBuffer *Object,
bool BufferOwned,
sys::fs::file_magic Type) {
if (Type == sys::fs::file_magic::unknown)
Type = sys::fs::identify_magic(Object->getBuffer());
@ -58,14 +56,12 @@ ErrorOr<ObjectFile *> ObjectFile::createObjectFile(MemoryBuffer *Object,
case sys::fs::file_magic::archive:
case sys::fs::file_magic::macho_universal_binary:
case sys::fs::file_magic::windows_resource:
if (BufferOwned)
delete Object;
return object_error::invalid_file_type;
case sys::fs::file_magic::elf_relocatable:
case sys::fs::file_magic::elf_executable:
case sys::fs::file_magic::elf_shared_object:
case sys::fs::file_magic::elf_core:
return createELFObjectFile(Object, BufferOwned);
return createELFObjectFile(Object);
case sys::fs::file_magic::macho_object:
case sys::fs::file_magic::macho_executable:
case sys::fs::file_magic::macho_fixed_virtual_memory_shared_lib:
@ -76,11 +72,11 @@ ErrorOr<ObjectFile *> ObjectFile::createObjectFile(MemoryBuffer *Object,
case sys::fs::file_magic::macho_bundle:
case sys::fs::file_magic::macho_dynamically_linked_shared_lib_stub:
case sys::fs::file_magic::macho_dsym_companion:
return createMachOObjectFile(Object, BufferOwned);
return createMachOObjectFile(Object);
case sys::fs::file_magic::coff_object:
case sys::fs::file_magic::coff_import_library:
case sys::fs::file_magic::pecoff_executable:
return createCOFFObjectFile(Object, BufferOwned);
return createCOFFObjectFile(Object);
}
llvm_unreachable("Unexpected Object File Type");
}

14
lib/Object/SymbolicFile.cpp
View File

@ -19,15 +19,13 @@
using namespace llvm;
using namespace object;
SymbolicFile::SymbolicFile(unsigned int Type, MemoryBuffer *Source,
bool BufferOwned)
: Binary(Type, Source, BufferOwned) {}
SymbolicFile::SymbolicFile(unsigned int Type, MemoryBuffer *Source)
: Binary(Type, Source) {}
SymbolicFile::~SymbolicFile() {}
ErrorOr<SymbolicFile *>
SymbolicFile::createSymbolicFile(MemoryBuffer *Object, bool BufferOwned,
sys::fs::file_magic Type,
SymbolicFile::createSymbolicFile(MemoryBuffer *Object, sys::fs::file_magic Type,
LLVMContext *Context) {
if (Type == sys::fs::file_magic::unknown)
Type = sys::fs::identify_magic(Object->getBuffer());
@ -35,14 +33,12 @@ SymbolicFile::createSymbolicFile(MemoryBuffer *Object, bool BufferOwned,
switch (Type) {
case sys::fs::file_magic::bitcode:
if (Context)
return IRObjectFile::createIRObjectFile(Object, *Context, BufferOwned);
return IRObjectFile::createIRObjectFile(Object, *Context);
// Fallthrough
case sys::fs::file_magic::unknown:
case sys::fs::file_magic::archive:
case sys::fs::file_magic::macho_universal_binary:
case sys::fs::file_magic::windows_resource:
if (BufferOwned)
delete Object;
return object_error::invalid_file_type;
case sys::fs::file_magic::elf_relocatable:
case sys::fs::file_magic::elf_executable:
@ -61,7 +57,7 @@ SymbolicFile::createSymbolicFile(MemoryBuffer *Object, bool BufferOwned,
case sys::fs::file_magic::coff_object:
case sys::fs::file_magic::coff_import_library:
case sys::fs::file_magic::pecoff_executable:
return ObjectFile::createObjectFile(Object, BufferOwned, Type);
return ObjectFile::createObjectFile(Object, Type);
}
llvm_unreachable("Unexpected Binary File Type");
}

3
tools/llvm-ar/llvm-ar.cpp
View File

@ -699,7 +699,7 @@ writeSymbolTable(raw_fd_ostream &Out, ArrayRef<NewArchiveIterator> Members,
MemoryBuffer *MemberBuffer = Buffers[MemberNum].get();
ErrorOr<object::SymbolicFile *> ObjOrErr =
object::SymbolicFile::createSymbolicFile(
MemberBuffer, false, sys::fs::file_magic::unknown, &Context);
MemberBuffer, sys::fs::file_magic::unknown, &Context);
if (!ObjOrErr)
continue; // FIXME: check only for "not an object file" errors.
std::unique_ptr<object::SymbolicFile> Obj(ObjOrErr.get());
@ -724,6 +724,7 @@ writeSymbolTable(raw_fd_ostream &Out, ArrayRef<NewArchiveIterator> Members,
MemberOffsetRefs.push_back(std::make_pair(Out.tell(), MemberNum));
print32BE(Out, 0);
}
Obj->releaseBuffer();
}
Out << NameOS.str();

3
tools/llvm-nm/llvm-nm.cpp
View File

@ -726,9 +726,10 @@ static void dumpSymbolNamesFromFile(std::string &Filename) {
return;
LLVMContext &Context = getGlobalContext();
ErrorOr<Binary *> BinaryOrErr = createBinary(Buffer.release(), &Context);
ErrorOr<Binary *> BinaryOrErr = createBinary(Buffer.get(), &Context);
if (error(BinaryOrErr.getError(), Filename))
return;
Buffer.release();
std::unique_ptr<Binary> Bin(BinaryOrErr.get());
if (Archive *A = dyn_cast<Archive>(Bin.get())) {