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to reflect the new license. We understand that people may be surprised that we're moving the header entirely to discuss the new license. We checked this carefully with the Foundation's lawyer and we believe this is the correct approach. Essentially, all code in the project is now made available by the LLVM project under our new license, so you will see that the license headers include that license only. Some of our contributors have contributed code under our old license, and accordingly, we have retained a copy of our old license notice in the top-level files in each project and repository. llvm-svn: 351636
52 lines
1.6 KiB
C++
52 lines
1.6 KiB
C++
//===- FuzzerExtFunctionsDlsym.cpp - Interface to external functions ------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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// Implementation for operating systems that support dlsym(). We only use it on
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// Apple platforms for now. We don't use this approach on Linux because it
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// requires that clients of LibFuzzer pass ``--export-dynamic`` to the linker.
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// That is a complication we don't wish to expose to clients right now.
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//===----------------------------------------------------------------------===//
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#include "FuzzerDefs.h"
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#if LIBFUZZER_APPLE
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#include "FuzzerExtFunctions.h"
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#include "FuzzerIO.h"
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#include <dlfcn.h>
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using namespace fuzzer;
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template <typename T>
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static T GetFnPtr(const char *FnName, bool WarnIfMissing) {
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dlerror(); // Clear any previous errors.
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void *Fn = dlsym(RTLD_DEFAULT, FnName);
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if (Fn == nullptr) {
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if (WarnIfMissing) {
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const char *ErrorMsg = dlerror();
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Printf("WARNING: Failed to find function \"%s\".", FnName);
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if (ErrorMsg)
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Printf(" Reason %s.", ErrorMsg);
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Printf("\n");
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}
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}
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return reinterpret_cast<T>(Fn);
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}
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namespace fuzzer {
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ExternalFunctions::ExternalFunctions() {
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#define EXT_FUNC(NAME, RETURN_TYPE, FUNC_SIG, WARN) \
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this->NAME = GetFnPtr<decltype(ExternalFunctions::NAME)>(#NAME, WARN)
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#include "FuzzerExtFunctions.def"
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#undef EXT_FUNC
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}
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} // namespace fuzzer
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#endif // LIBFUZZER_APPLE
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