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//===----- TPCDebugObjectRegistrar.cpp - TPC-based debug registration -----===//
//
// 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
//
//===----------------------------------------------------------------------===//
#include "llvm/ExecutionEngine/Orc/TPCDebugObjectRegistrar.h"
#include "llvm/ExecutionEngine/Orc/Core.h"
#include "llvm/ExecutionEngine/Orc/TargetProcess/JITLoaderGDB.h"
#include "llvm/Support/BinaryStreamWriter.h"
namespace llvm {
namespace orc {
// Counterpart for readDebugObjectInfo() in TargetProcess/JITLoaderGDB.cpp
static std::vector<uint8_t>
writeDebugObjectInfo(sys::MemoryBlock TargetMemBlock) {
auto DebugObjAddr = pointerToJITTargetAddress(TargetMemBlock.base());
uint64_t DebugObjSize = TargetMemBlock.allocatedSize();
std::vector<uint8_t> ArgBuffer;
ArgBuffer.resize(sizeof(decltype(DebugObjAddr)) +
sizeof(decltype(DebugObjSize)));
BinaryStreamWriter ArgWriter(ArgBuffer, support::endianness::big);
cantFail(ArgWriter.writeInteger(DebugObjAddr));
cantFail(ArgWriter.writeInteger(DebugObjSize));
return ArgBuffer;
}
Expected<std::unique_ptr<TPCDebugObjectRegistrar>>
createJITLoaderGDBRegistrar(TargetProcessControl &TPC) {
auto ProcessHandle = TPC.loadDylib(nullptr);
if (!ProcessHandle)
return ProcessHandle.takeError();
SymbolStringPtr RegisterFn =
TPC.getTargetTriple().isOSBinFormatMachO()
? TPC.intern("_llvm_orc_registerJITLoaderGDBWrapper")
: TPC.intern("llvm_orc_registerJITLoaderGDBWrapper");
SymbolLookupSet RegistrationSymbols;
RegistrationSymbols.add(RegisterFn);
auto Result = TPC.lookupSymbols({{*ProcessHandle, RegistrationSymbols}});
if (!Result)
return Result.takeError();
assert(Result->size() == 1 && "Unexpected number of dylibs in result");
assert((*Result)[0].size() == 1 &&
"Unexpected number of addresses in result");
return std::make_unique<TPCDebugObjectRegistrar>(TPC, (*Result)[0][0],
&writeDebugObjectInfo);
}
} // namespace orc
} // namespace llvm
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