llvm/llvm/lib/ExecutionEngine/Orc/TargetProcess/JITLoaderGDB.cpp

//===- JITLoaderGDB.h - Register objects via GDB JIT interface -*- C++ -*-===//
//
// 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/TargetProcess/JITLoaderGDB.h"

#include "llvm/ExecutionEngine/JITSymbol.h"
#include "llvm/Support/BinaryStreamReader.h"
#include "llvm/Support/FormatVariadic.h"

#include <cstdint>
#include <mutex>
#include <utility>

#define DEBUG_TYPE …

// First version as landed in August 2009
static constexpr uint32_t JitDescriptorVersion = …;

extern "C" {

// We put information about the JITed function in this global, which the
// debugger reads.  Make sure to specify the version statically, because the
// debugger checks the version before we can set it during runtime.
LLVM_ATTRIBUTE_VISIBILITY_DEFAULT
struct jit_descriptor __jit_debug_descriptor = …;

// Debuggers that implement the GDB JIT interface put a special breakpoint in
// this function.
LLVM_ATTRIBUTE_VISIBILITY_DEFAULT
LLVM_ATTRIBUTE_NOINLINE void __jit_debug_register_code() { … }
}

usingnamespacellvm;
usingnamespacellvm::orc;

// Register debug object, return error message or null for success.
static void appendJITDebugDescriptor(const char *ObjAddr, size_t Size) { … }

extern "C" orc::shared::CWrapperFunctionResult
llvm_orc_registerJITLoaderGDBAllocAction(const char *Data, size_t Size) { … }

extern "C" orc::shared::CWrapperFunctionResult
llvm_orc_registerJITLoaderGDBWrapper(const char *Data, uint64_t Size) { … }