28219f7f99
The following patch is result of libsanitizer/merge.sh from c425db2eb558c263 (yesterday evening). Bootstrapped/regtested on x86_64-linux and i686-linux (together with the follow-up 3 patches I'm about to post). BTW, seems upstream has added riscv64 support for I think lsan/tsan, so if anyone is willing to try it there, it would be a matter of copying e.g. the s390*-*-linux* libsanitizer/configure.tgt entry to riscv64-*-linux* with the obvious s/s390x/riscv64/ change in it.
106 lines
4.2 KiB
C++
106 lines
4.2 KiB
C++
//===-- asan_interceptors_memintrinsics.cpp -------------------------------===//
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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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//
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// This file is a part of AddressSanitizer, an address sanity checker.
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//
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// ASan versions of memcpy, memmove, and memset.
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//===---------------------------------------------------------------------===//
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#define SANITIZER_COMMON_NO_REDEFINE_BUILTINS
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#include "asan_interceptors_memintrinsics.h"
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#include "asan_interceptors.h"
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#include "asan_report.h"
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#include "asan_stack.h"
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#include "asan_suppressions.h"
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using namespace __asan;
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// memcpy is called during __asan_init() from the internals of printf(...).
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// We do not treat memcpy with to==from as a bug.
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// See http://llvm.org/bugs/show_bug.cgi?id=11763.
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#define ASAN_MEMCPY_IMPL(ctx, to, from, size) \
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do { \
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if (LIKELY(replace_intrin_cached)) { \
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if (LIKELY(to != from)) { \
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CHECK_RANGES_OVERLAP("memcpy", to, size, from, size); \
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} \
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ASAN_READ_RANGE(ctx, from, size); \
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ASAN_WRITE_RANGE(ctx, to, size); \
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} else if (UNLIKELY(!AsanInited())) { \
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return internal_memcpy(to, from, size); \
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} \
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return REAL(memcpy)(to, from, size); \
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} while (0)
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// memset is called inside Printf.
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#define ASAN_MEMSET_IMPL(ctx, block, c, size) \
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do { \
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if (LIKELY(replace_intrin_cached)) { \
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ASAN_WRITE_RANGE(ctx, block, size); \
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} else if (UNLIKELY(!AsanInited())) { \
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return internal_memset(block, c, size); \
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} \
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return REAL(memset)(block, c, size); \
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} while (0)
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#define ASAN_MEMMOVE_IMPL(ctx, to, from, size) \
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do { \
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if (LIKELY(replace_intrin_cached)) { \
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ASAN_READ_RANGE(ctx, from, size); \
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ASAN_WRITE_RANGE(ctx, to, size); \
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} \
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return internal_memmove(to, from, size); \
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} while (0)
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void *__asan_memcpy(void *to, const void *from, uptr size) {
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ASAN_MEMCPY_IMPL(nullptr, to, from, size);
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}
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void *__asan_memset(void *block, int c, uptr size) {
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ASAN_MEMSET_IMPL(nullptr, block, c, size);
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}
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void *__asan_memmove(void *to, const void *from, uptr size) {
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ASAN_MEMMOVE_IMPL(nullptr, to, from, size);
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}
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#if SANITIZER_FUCHSIA
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// Fuchsia doesn't use sanitizer_common_interceptors.inc, but
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// the only things there it wants are these three. Just define them
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// as aliases here rather than repeating the contents.
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extern "C" decltype(__asan_memcpy) memcpy[[gnu::alias("__asan_memcpy")]];
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extern "C" decltype(__asan_memmove) memmove[[gnu::alias("__asan_memmove")]];
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extern "C" decltype(__asan_memset) memset[[gnu::alias("__asan_memset")]];
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#else // SANITIZER_FUCHSIA
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#define COMMON_INTERCEPTOR_MEMMOVE_IMPL(ctx, to, from, size) \
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do { \
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ASAN_INTERCEPTOR_ENTER(ctx, memmove); \
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ASAN_MEMMOVE_IMPL(ctx, to, from, size); \
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} while (false)
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#define COMMON_INTERCEPTOR_MEMCPY_IMPL(ctx, to, from, size) \
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do { \
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ASAN_INTERCEPTOR_ENTER(ctx, memcpy); \
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ASAN_MEMCPY_IMPL(ctx, to, from, size); \
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} while (false)
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#define COMMON_INTERCEPTOR_MEMSET_IMPL(ctx, block, c, size) \
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do { \
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ASAN_INTERCEPTOR_ENTER(ctx, memset); \
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ASAN_MEMSET_IMPL(ctx, block, c, size); \
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} while (false)
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#include "sanitizer_common/sanitizer_common_interceptors_memintrinsics.inc"
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#endif // SANITIZER_FUCHSIA
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