mirror of
https://github.com/RPCSX/llvm.git
synced 2024-11-30 23:20:54 +00:00
eae4673c2f
make_error_code(object_error) is slow because object::object_category() uses a ManagedStatic variable. But the real problem is that the function is called too frequently. This patch uses std::error_code() instead of object_error::success. In most cases, we return "success", so this patch reduces number of function calls to that function. http://reviews.llvm.org/D10333 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@239409 91177308-0d34-0410-b5e6-96231b3b80d8
101 lines
3.6 KiB
C++
101 lines
3.6 KiB
C++
//===- ObjectFile.cpp - File format independent object file -----*- C++ -*-===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file defines a file format independent ObjectFile class.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "llvm/Object/COFF.h"
|
|
#include "llvm/Object/MachO.h"
|
|
#include "llvm/Object/ObjectFile.h"
|
|
#include "llvm/Support/ErrorHandling.h"
|
|
#include "llvm/Support/FileSystem.h"
|
|
#include "llvm/Support/MemoryBuffer.h"
|
|
#include "llvm/Support/raw_ostream.h"
|
|
#include <system_error>
|
|
|
|
using namespace llvm;
|
|
using namespace object;
|
|
|
|
void ObjectFile::anchor() { }
|
|
|
|
ObjectFile::ObjectFile(unsigned int Type, MemoryBufferRef Source)
|
|
: SymbolicFile(Type, Source) {}
|
|
|
|
std::error_code ObjectFile::printSymbolName(raw_ostream &OS,
|
|
DataRefImpl Symb) const {
|
|
StringRef Name;
|
|
if (std::error_code EC = getSymbolName(Symb, Name))
|
|
return EC;
|
|
OS << Name;
|
|
return std::error_code();
|
|
}
|
|
|
|
uint32_t ObjectFile::getSymbolAlignment(DataRefImpl DRI) const { return 0; }
|
|
|
|
section_iterator ObjectFile::getRelocatedSection(DataRefImpl Sec) const {
|
|
return section_iterator(SectionRef(Sec, this));
|
|
}
|
|
|
|
ErrorOr<std::unique_ptr<ObjectFile>>
|
|
ObjectFile::createObjectFile(MemoryBufferRef Object, sys::fs::file_magic Type) {
|
|
StringRef Data = Object.getBuffer();
|
|
if (Type == sys::fs::file_magic::unknown)
|
|
Type = sys::fs::identify_magic(Data);
|
|
|
|
switch (Type) {
|
|
case sys::fs::file_magic::unknown:
|
|
case sys::fs::file_magic::bitcode:
|
|
case sys::fs::file_magic::archive:
|
|
case sys::fs::file_magic::macho_universal_binary:
|
|
case sys::fs::file_magic::windows_resource:
|
|
return object_error::invalid_file_type;
|
|
case sys::fs::file_magic::elf:
|
|
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);
|
|
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:
|
|
case sys::fs::file_magic::macho_core:
|
|
case sys::fs::file_magic::macho_preload_executable:
|
|
case sys::fs::file_magic::macho_dynamically_linked_shared_lib:
|
|
case sys::fs::file_magic::macho_dynamic_linker:
|
|
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:
|
|
case sys::fs::file_magic::macho_kext_bundle:
|
|
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);
|
|
}
|
|
llvm_unreachable("Unexpected Object File Type");
|
|
}
|
|
|
|
ErrorOr<OwningBinary<ObjectFile>>
|
|
ObjectFile::createObjectFile(StringRef ObjectPath) {
|
|
ErrorOr<std::unique_ptr<MemoryBuffer>> FileOrErr =
|
|
MemoryBuffer::getFile(ObjectPath);
|
|
if (std::error_code EC = FileOrErr.getError())
|
|
return EC;
|
|
std::unique_ptr<MemoryBuffer> Buffer = std::move(FileOrErr.get());
|
|
|
|
ErrorOr<std::unique_ptr<ObjectFile>> ObjOrErr =
|
|
createObjectFile(Buffer->getMemBufferRef());
|
|
if (std::error_code EC = ObjOrErr.getError())
|
|
return EC;
|
|
std::unique_ptr<ObjectFile> Obj = std::move(ObjOrErr.get());
|
|
|
|
return OwningBinary<ObjectFile>(std::move(Obj), std::move(Buffer));
|
|
}
|