117 lines
4.5 KiB
C++
117 lines
4.5 KiB
C++
//===- bolt/RuntimeLibs/RuntimeLibrary.cpp - Runtime Library --------------===//
|
|
//
|
|
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
|
|
// See https://llvm.org/LICENSE.txt for license information.
|
|
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file implements the RuntimeLibrary class.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "bolt/RuntimeLibs/RuntimeLibrary.h"
|
|
#include "bolt/Core/Linker.h"
|
|
#include "bolt/RuntimeLibs/RuntimeLibraryVariables.inc"
|
|
#include "bolt/Utils/Utils.h"
|
|
#include "llvm/BinaryFormat/Magic.h"
|
|
#include "llvm/Object/Archive.h"
|
|
#include "llvm/Object/ObjectFile.h"
|
|
#include "llvm/Support/Path.h"
|
|
#include "llvm/Support/Program.h"
|
|
|
|
#define DEBUG_TYPE "bolt-rtlib"
|
|
|
|
using namespace llvm;
|
|
using namespace bolt;
|
|
|
|
void RuntimeLibrary::anchor() {}
|
|
|
|
std::string RuntimeLibrary::getLibPathByToolPath(StringRef ToolPath,
|
|
StringRef LibFileName) {
|
|
StringRef Dir = llvm::sys::path::parent_path(ToolPath);
|
|
SmallString<128> LibPath = llvm::sys::path::parent_path(Dir);
|
|
llvm::sys::path::append(LibPath, "lib" LLVM_LIBDIR_SUFFIX);
|
|
if (!llvm::sys::fs::exists(LibPath)) {
|
|
// In some cases we install bolt binary into one level deeper in bin/,
|
|
// we need to go back one more level to find lib directory.
|
|
LibPath = llvm::sys::path::parent_path(llvm::sys::path::parent_path(Dir));
|
|
llvm::sys::path::append(LibPath, "lib" LLVM_LIBDIR_SUFFIX);
|
|
}
|
|
llvm::sys::path::append(LibPath, LibFileName);
|
|
if (!llvm::sys::fs::exists(LibPath)) {
|
|
// If it is a symlink, check the directory that the symlink points to.
|
|
if (llvm::sys::fs::is_symlink_file(ToolPath)) {
|
|
SmallString<256> RealPath;
|
|
llvm::sys::fs::real_path(ToolPath, RealPath);
|
|
if (llvm::ErrorOr<std::string> P =
|
|
llvm::sys::findProgramByName(RealPath)) {
|
|
outs() << "BOLT-INFO: library not found: " << LibPath << "\n"
|
|
<< "BOLT-INFO: " << ToolPath << " is a symlink; will look up "
|
|
<< LibFileName
|
|
<< " at the target directory that the symlink points to\n";
|
|
return getLibPath(*P, LibFileName);
|
|
}
|
|
}
|
|
errs() << "BOLT-ERROR: library not found: " << LibPath << "\n";
|
|
exit(1);
|
|
}
|
|
return std::string(LibPath);
|
|
}
|
|
|
|
std::string RuntimeLibrary::getLibPathByInstalled(StringRef LibFileName) {
|
|
SmallString<128> LibPath(CMAKE_INSTALL_FULL_LIBDIR);
|
|
llvm::sys::path::append(LibPath, LibFileName);
|
|
return std::string(LibPath);
|
|
}
|
|
|
|
std::string RuntimeLibrary::getLibPath(StringRef ToolPath,
|
|
StringRef LibFileName) {
|
|
if (llvm::sys::fs::exists(LibFileName)) {
|
|
return std::string(LibFileName);
|
|
}
|
|
|
|
std::string ByTool = getLibPathByToolPath(ToolPath, LibFileName);
|
|
if (llvm::sys::fs::exists(ByTool)) {
|
|
return ByTool;
|
|
}
|
|
|
|
std::string ByInstalled = getLibPathByInstalled(LibFileName);
|
|
if (llvm::sys::fs::exists(ByInstalled)) {
|
|
return ByInstalled;
|
|
}
|
|
|
|
errs() << "BOLT-ERROR: library not found: " << ByTool << ", " << ByInstalled
|
|
<< ", or " << LibFileName << "\n";
|
|
exit(1);
|
|
}
|
|
|
|
void RuntimeLibrary::loadLibrary(StringRef LibPath, BOLTLinker &Linker,
|
|
BOLTLinker::SectionsMapper MapSections) {
|
|
ErrorOr<std::unique_ptr<MemoryBuffer>> MaybeBuf =
|
|
MemoryBuffer::getFile(LibPath, false, false);
|
|
check_error(MaybeBuf.getError(), LibPath);
|
|
std::unique_ptr<MemoryBuffer> B = std::move(MaybeBuf.get());
|
|
file_magic Magic = identify_magic(B->getBuffer());
|
|
|
|
if (Magic == file_magic::archive) {
|
|
Error Err = Error::success();
|
|
object::Archive Archive(B->getMemBufferRef(), Err);
|
|
for (const object::Archive::Child &C : Archive.children(Err)) {
|
|
std::unique_ptr<object::Binary> Bin = cantFail(C.getAsBinary());
|
|
if (object::ObjectFile *Obj = dyn_cast<object::ObjectFile>(&*Bin))
|
|
Linker.loadObject(Obj->getMemoryBufferRef(), MapSections);
|
|
}
|
|
check_error(std::move(Err), B->getBufferIdentifier());
|
|
} else if (Magic == file_magic::elf_relocatable ||
|
|
Magic == file_magic::elf_shared_object) {
|
|
std::unique_ptr<object::ObjectFile> Obj =
|
|
cantFail(object::ObjectFile::createObjectFile(B->getMemBufferRef()),
|
|
"error creating in-memory object");
|
|
Linker.loadObject(Obj->getMemoryBufferRef(), MapSections);
|
|
} else {
|
|
errs() << "BOLT-ERROR: unrecognized library format: " << LibPath << "\n";
|
|
exit(1);
|
|
}
|
|
}
|