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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
24 lines
987 B
Modula-2
24 lines
987 B
Modula-2
//===- FuzzerExtFunctions.def - 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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// This defines the external function pointers that
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// ``fuzzer::ExternalFunctions`` should contain and try to initialize. The
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// EXT_FUNC macro must be defined at the point of inclusion. The signature of
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// the macro is:
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//
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// EXT_FUNC(<name>, <return_type>, <function_signature>, <warn_if_missing>)
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//===----------------------------------------------------------------------===//
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// Optional user functions
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EXT_FUNC(LLVMFuzzerInitialize, int, (int *argc, char ***argv), false);
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EXT_FUNC(LLVMFuzzerCustomMutator, size_t,
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(uint8_t * Data, size_t Size, size_t MaxSize, unsigned int Seed),
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false);
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// TODO: Sanitizer functions
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