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Make ObjectFile ownership of the MemoryBuffer optional.

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This allows llvm-ar to mmap the input files only once.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@200040 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Rafael Espindola
2014-01-24 21:32:21 +00:00
parent 0078935812
commit 584fe2db6a
11 changed files with 98 additions and 85 deletions
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19
lib/Object/MachOObjectFile.cpp
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@ -419,10 +419,10 @@ static uint32_t getSectionFlags(const MachOObjectFile *O,
return Sect.flags;
}
MachOObjectFile::MachOObjectFile(MemoryBuffer *Object,
bool IsLittleEndian, bool Is64bits,
error_code &ec)
: ObjectFile(getMachOType(IsLittleEndian, Is64bits), Object),
MachOObjectFile::MachOObjectFile(MemoryBuffer *Object, bool IsLittleEndian,
bool Is64bits, error_code &EC,
bool BufferOwned)
: ObjectFile(getMachOType(IsLittleEndian, Is64bits), Object, BufferOwned),
SymtabLoadCmd(NULL), DysymtabLoadCmd(NULL), DataInCodeLoadCmd(NULL) {
uint32_t LoadCommandCount = this->getHeader().ncmds;
MachO::LoadCommandType SegmentLoadType = is64Bit() ?
@ -1582,18 +1582,19 @@ void MachOObjectFile::ReadULEB128s(uint64_t Index,
}
}
ErrorOr<ObjectFile *> ObjectFile::createMachOObjectFile(MemoryBuffer *Buffer) {
ErrorOr<ObjectFile *> ObjectFile::createMachOObjectFile(MemoryBuffer *Buffer,
bool BufferOwned) {
StringRef Magic = Buffer->getBuffer().slice(0, 4);
error_code EC;
OwningPtr<MachOObjectFile> Ret;
if (Magic == "\xFE\xED\xFA\xCE")
Ret.reset(new MachOObjectFile(Buffer, false, false, EC));
Ret.reset(new MachOObjectFile(Buffer, false, false, EC, BufferOwned));
else if (Magic == "\xCE\xFA\xED\xFE")
Ret.reset(new MachOObjectFile(Buffer, true, false, EC));
Ret.reset(new MachOObjectFile(Buffer, true, false, EC, BufferOwned));
else if (Magic == "\xFE\xED\xFA\xCF")
Ret.reset(new MachOObjectFile(Buffer, false, true, EC));
Ret.reset(new MachOObjectFile(Buffer, false, true, EC, BufferOwned));
else if (Magic == "\xCF\xFA\xED\xFE")
Ret.reset(new MachOObjectFile(Buffer, true, true, EC));
Ret.reset(new MachOObjectFile(Buffer, true, true, EC, BufferOwned));
else {
delete Buffer;
return object_error::parse_failed;