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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
42 lines
1.5 KiB
C++
42 lines
1.5 KiB
C++
//===- FuzzerExtraCounters.cpp - Extra coverage counters ------------------===//
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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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// Extra coverage counters defined by user code.
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//===----------------------------------------------------------------------===//
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#include "FuzzerDefs.h"
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#if LIBFUZZER_LINUX || LIBFUZZER_NETBSD || LIBFUZZER_FREEBSD || \
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LIBFUZZER_OPENBSD
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__attribute__((weak)) extern uint8_t __start___libfuzzer_extra_counters;
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__attribute__((weak)) extern uint8_t __stop___libfuzzer_extra_counters;
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namespace fuzzer {
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uint8_t *ExtraCountersBegin() { return &__start___libfuzzer_extra_counters; }
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uint8_t *ExtraCountersEnd() { return &__stop___libfuzzer_extra_counters; }
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ATTRIBUTE_NO_SANITIZE_ALL
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void ClearExtraCounters() { // hand-written memset, don't asan-ify.
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uintptr_t *Beg = reinterpret_cast<uintptr_t*>(ExtraCountersBegin());
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uintptr_t *End = reinterpret_cast<uintptr_t*>(ExtraCountersEnd());
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for (; Beg < End; Beg++) {
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*Beg = 0;
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__asm__ __volatile__("" : : : "memory");
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}
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}
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} // namespace fuzzer
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#else
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// TODO: implement for other platforms.
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namespace fuzzer {
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uint8_t *ExtraCountersBegin() { return nullptr; }
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uint8_t *ExtraCountersEnd() { return nullptr; }
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void ClearExtraCounters() {}
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} // namespace fuzzer
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#endif
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