llvm/compiler-rt/lib/asan/asan_interceptors_memintrinsics.cpp

//===-- asan_interceptors_memintrinsics.cpp -------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===---------------------------------------------------------------------===//
//
// This file is a part of AddressSanitizer, an address sanity checker.
//
// ASan versions of memcpy, memmove, and memset.
//===---------------------------------------------------------------------===//

#define SANITIZER_COMMON_NO_REDEFINE_BUILTINS

#include "asan_interceptors_memintrinsics.h"

#include "asan_interceptors.h"
#include "asan_report.h"
#include "asan_stack.h"
#include "asan_suppressions.h"

usingnamespace__asan;

// memcpy is called during __asan_init() from the internals of printf(...).
// We do not treat memcpy with to==from as a bug.
// See http://llvm.org/bugs/show_bug.cgi?id=11763.
#define ASAN_MEMCPY_IMPL(ctx, to, from, size) …

// memset is called inside Printf.
#define ASAN_MEMSET_IMPL(ctx, block, c, size) …

#define ASAN_MEMMOVE_IMPL(ctx, to, from, size) …

void *__asan_memcpy(void *to, const void *from, uptr size) { … }

void *__asan_memset(void *block, int c, uptr size) { … }

void *__asan_memmove(void *to, const void *from, uptr size) { … }

#if SANITIZER_FUCHSIA

// Fuchsia doesn't use sanitizer_common_interceptors.inc, but
// the only things there it wants are these three.  Just define them
// as aliases here rather than repeating the contents.

extern "C" decltype(__asan_memcpy) memcpy[[gnu::alias("__asan_memcpy")]];
extern "C" decltype(__asan_memmove) memmove[[gnu::alias("__asan_memmove")]];
extern "C" decltype(__asan_memset) memset[[gnu::alias("__asan_memset")]];

#else  // SANITIZER_FUCHSIA

#define COMMON_INTERCEPTOR_MEMMOVE_IMPL(ctx, to, from, size) …

#define COMMON_INTERCEPTOR_MEMCPY_IMPL(ctx, to, from, size) …

#define COMMON_INTERCEPTOR_MEMSET_IMPL(ctx, block, c, size) …

#include "sanitizer_common/sanitizer_common_interceptors_memintrinsics.inc"

#endif  // SANITIZER_FUCHSIA