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Sync ar_archive_writer to LLVM 18.1.3

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From LLVM 15.0.0-rc3. This adds support for COFF archives containing
Arm64EC object files and has various fixes for AIX big archive files.
This commit is contained in:
bjorn3 2024-04-16 18:31:43 +00:00
parent 959a2eb275
commit 58e551433d
8 changed files with 201 additions and 98 deletions
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128
compiler/rustc_llvm/llvm-wrapper/SymbolWrapper.cpp
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@ -4,12 +4,15 @@
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
// Derived from:
// * https://github.com/llvm/llvm-project/blob/8ef3e895ad8ab1724e2b87cabad1dacdc7a397a3/llvm/include/llvm/Object/ArchiveWriter.h
// * https://github.com/llvm/llvm-project/blob/8ef3e895ad8ab1724e2b87cabad1dacdc7a397a3/llvm/lib/Object/ArchiveWriter.cpp
// * https://github.com/llvm/llvm-project/blob/ef6d1ec07c693352c4a60dd58db08d2d8558f6ea/llvm/include/llvm/Object/ArchiveWriter.h
// * https://github.com/llvm/llvm-project/blob/ef6d1ec07c693352c4a60dd58db08d2d8558f6ea/llvm/lib/Object/ArchiveWriter.cpp
#include "SuppressLLVMWarnings.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/IR/LLVMContext.h"
#include "llvm/Object/COFF.h"
#include "llvm/Object/COFFImportFile.h"
#include "llvm/Object/IRObjectFile.h"
#include "llvm/Object/ObjectFile.h"
#include <llvm/Support/raw_ostream.h>
@ -34,6 +37,26 @@ static bool isArchiveSymbol(const object::BasicSymbolRef &S) {
typedef void *(*LLVMRustGetSymbolsCallback)(void *, const char *);
typedef void *(*LLVMRustGetSymbolsErrorCallback)(const char *);
static Expected<std::unique_ptr<SymbolicFile>>
getSymbolicFile(MemoryBufferRef Buf, LLVMContext &Context) {
const file_magic Type = identify_magic(Buf.getBuffer());
// Don't attempt to read non-symbolic file types.
if (!object::SymbolicFile::isSymbolicFile(Type, &Context))
return nullptr;
if (Type == file_magic::bitcode) {
auto ObjOrErr = object::SymbolicFile::createSymbolicFile(
Buf, file_magic::bitcode, &Context);
if (!ObjOrErr)
return ObjOrErr.takeError();
return std::move(*ObjOrErr);
} else {
auto ObjOrErr = object::SymbolicFile::createSymbolicFile(Buf);
if (!ObjOrErr)
return ObjOrErr.takeError();
return std::move(*ObjOrErr);
}
}
// Note: This is implemented in C++ instead of using the C api from Rust as
// IRObjectFile doesn't implement getSymbolName, only printSymbolName, which is
// inaccessible from the C api.
@ -49,36 +72,16 @@ LLVMRustGetSymbols(char *BufPtr, size_t BufLen, void *State,
// In the scenario when LLVMContext is populated SymbolicFile will contain a
// reference to it, thus SymbolicFile should be destroyed first.
LLVMContext Context;
std::unique_ptr<object::SymbolicFile> Obj;
const file_magic Type = identify_magic(Buf->getBuffer());
if (!object::SymbolicFile::isSymbolicFile(Type, &Context)) {
return 0;
}
if (Type == file_magic::bitcode) {
auto ObjOrErr = object::SymbolicFile::createSymbolicFile(
Buf->getMemBufferRef(), file_magic::bitcode, &Context);
if (!ObjOrErr) {
Error E = ObjOrErr.takeError();
SmallString<0> ErrorBuf;
auto Error = raw_svector_ostream(ErrorBuf);
Error << E << '\0';
return ErrorCallback(Error.str().data());
}
Obj = std::move(*ObjOrErr);
} else {
auto ObjOrErr =
object::SymbolicFile::createSymbolicFile(Buf->getMemBufferRef());
if (!ObjOrErr) {
Error E = ObjOrErr.takeError();
SmallString<0> ErrorBuf;
auto Error = raw_svector_ostream(ErrorBuf);
Error << E << '\0';
return ErrorCallback(Error.str().data());
}
Obj = std::move(*ObjOrErr);
Expected<std::unique_ptr<object::SymbolicFile>> ObjOrErr =
getSymbolicFile(Buf->getMemBufferRef(), Context);
if (!ObjOrErr) {
Error E = ObjOrErr.takeError();
SmallString<0> ErrorBuf;
auto Error = raw_svector_ostream(ErrorBuf);
Error << E << '\0';
return ErrorCallback(Error.str().data());
}
std::unique_ptr<object::SymbolicFile> Obj = std::move(*ObjOrErr);
for (const object::BasicSymbolRef &S : Obj->symbols()) {
if (!isArchiveSymbol(S))
@ -97,3 +100,66 @@ LLVMRustGetSymbols(char *BufPtr, size_t BufLen, void *State,
}
return 0;
}
// Encoding true and false as invalid pointer values
#define TRUE_PTR (void *)1
#define FALSE_PTR (void *)0
extern "C" bool LLVMRustIs64BitSymbolicFile(char *BufPtr, size_t BufLen) {
std::unique_ptr<MemoryBuffer> Buf = MemoryBuffer::getMemBuffer(
StringRef(BufPtr, BufLen), StringRef("LLVMRustGetSymbolsObject"), false);
SmallString<0> SymNameBuf;
auto SymName = raw_svector_ostream(SymNameBuf);
// In the scenario when LLVMContext is populated SymbolicFile will contain a
// reference to it, thus SymbolicFile should be destroyed first.
LLVMContext Context;
Expected<std::unique_ptr<object::SymbolicFile>> ObjOrErr =
getSymbolicFile(Buf->getMemBufferRef(), Context);
if (!ObjOrErr) {
return false;
}
std::unique_ptr<object::SymbolicFile> Obj = std::move(*ObjOrErr);
return Obj != nullptr ? Obj->is64Bit() : false;
}
extern "C" bool LLVMRustIsECObject(char *BufPtr, size_t BufLen) {
std::unique_ptr<MemoryBuffer> Buf = MemoryBuffer::getMemBuffer(
StringRef(BufPtr, BufLen), StringRef("LLVMRustGetSymbolsObject"), false);
SmallString<0> SymNameBuf;
auto SymName = raw_svector_ostream(SymNameBuf);
// In the scenario when LLVMContext is populated SymbolicFile will contain a
// reference to it, thus SymbolicFile should be destroyed first.
LLVMContext Context;
Expected<std::unique_ptr<object::SymbolicFile>> ObjOrErr =
getSymbolicFile(Buf->getMemBufferRef(), Context);
if (!ObjOrErr) {
return false;
}
std::unique_ptr<object::SymbolicFile> Obj = std::move(*ObjOrErr);
if (Obj == nullptr) {
return false;
}
if (Obj->isCOFF())
return cast<llvm::object::COFFObjectFile>(&*Obj)->getMachine() !=
COFF::IMAGE_FILE_MACHINE_ARM64;
if (Obj->isCOFFImportFile())
return cast<llvm::object::COFFImportFile>(&*Obj)->getMachine() !=
COFF::IMAGE_FILE_MACHINE_ARM64;
if (Obj->isIR()) {
Expected<std::string> TripleStr =
getBitcodeTargetTriple(Obj->getMemoryBufferRef());
if (!TripleStr)
return false;
Triple T(*TripleStr);
return T.isWindowsArm64EC() || T.getArch() == Triple::x86_64;
}
return false;
}