llvm/compiler-rt/lib/fuzzer/FuzzerExtFunctionsWeak.cpp

//===- FuzzerExtFunctionsWeak.cpp - Interface to external functions -------===//
//
// 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
//
//===----------------------------------------------------------------------===//
// Implementation for Linux. This relies on the linker's support for weak
// symbols. We don't use this approach on Apple platforms because it requires
// clients of LibFuzzer to pass ``-U _<symbol_name>`` to the linker to allow
// weak symbols to be undefined. That is a complication we don't want to expose
// to clients right now.
//===----------------------------------------------------------------------===//
#include "FuzzerPlatform.h"
#if LIBFUZZER_LINUX || LIBFUZZER_NETBSD || LIBFUZZER_FUCHSIA ||                \
    LIBFUZZER_FREEBSD || LIBFUZZER_EMSCRIPTEN

#include "FuzzerExtFunctions.h"
#include "FuzzerIO.h"

extern "C" {
// Declare these symbols as weak to allow them to be optionally defined.
#define EXT_FUNC …

#include "FuzzerExtFunctions.def"

#undef EXT_FUNC
}

usingnamespacefuzzer;

static void CheckFnPtr(void *FnPtr, const char *FnName, bool WarnIfMissing) { … }

namespace fuzzer {

ExternalFunctions::ExternalFunctions() { … }

} // namespace fuzzer

#endif