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8b5c81728c
The motivation for this change is to fix linking issues on OSX. However this only partially fixes linking issues (the uninstrumented tests and a few others won't succesfully link yet). This change introduces a struct of function pointers (``fuzzer::ExternalFuntions``) which when initialised will point to the optional functions if they are available. Currently these ``LLVMFuzzerInitialize`` and ``LLVMFuzzerCustomMutator`` functions. Two implementations of ``fuzzer::ExternalFunctions`` constructor are provided one for Linux and one for OSX. The OSX implementation uses ``dlsym()`` because the prior implementation using weak symbols does not work unless the additional flags are passed to the linker. The Linux implementation continues to use weak symbols because the ``dlsym()`` approach does not work unless additional flags are passed to the linker. Differential Revision: http://reviews.llvm.org/D20741 llvm-svn: 271491
33 lines
967 B
C++
33 lines
967 B
C++
//===- FuzzerExtFunctions.h - Interface to external functions ---*- C++ -* ===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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// Defines an interface to (possibly optional) functions.
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_FUZZER_EXT_FUNCTIONS_H
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#define LLVM_FUZZER_EXT_FUNCTIONS_H
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#include <stddef.h>
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#include <stdint.h>
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namespace fuzzer {
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struct ExternalFunctions {
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// Initialize function pointers. Functions that are not available
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// will be set to nullptr.
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ExternalFunctions();
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#define EXT_FUNC(NAME, RETURN_TYPE, FUNC_SIG, WARN) \
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RETURN_TYPE(*NAME) FUNC_SIG = nullptr
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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
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