llvm/compiler-rt/lib/hwasan/hwasan_new_delete.cpp

//===-- hwasan_new_delete.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 HWAddressSanitizer.
//
// Interceptors for operators new and delete.
//===----------------------------------------------------------------------===//

#include "hwasan.h"
#include "interception/interception.h"
#include "sanitizer_common/sanitizer_allocator.h"
#include "sanitizer_common/sanitizer_allocator_report.h"

#include <stddef.h>
#include <stdlib.h>

#if HWASAN_REPLACE_OPERATORS_NEW_AND_DELETE

// TODO(alekseys): throw std::bad_alloc instead of dying on OOM.
#define OPERATOR_NEW_BODY(nothrow) …
#define OPERATOR_NEW_ALIGN_BODY(nothrow) …

#define OPERATOR_DELETE_BODY …

#elif defined(__ANDROID__)

// We don't actually want to intercept operator new and delete on Android, but
// since we previously released a runtime that intercepted these functions,
// removing the interceptors would break ABI. Therefore we simply forward to
// malloc and free.
#define OPERATOR_NEW_BODY …
#define OPERATOR_DELETE_BODY …

#endif

#ifdef OPERATOR_NEW_BODY

usingnamespace__hwasan;

// Fake std::nothrow_t to avoid including <new>.
namespace std {
struct nothrow_t { … };
}  // namespace std

INTERCEPTOR_ATTRIBUTE SANITIZER_WEAK_ATTRIBUTE void *operator new(size_t size) { … }
INTERCEPTOR_ATTRIBUTE SANITIZER_WEAK_ATTRIBUTE void *operator new[](
    size_t size) { … }
INTERCEPTOR_ATTRIBUTE SANITIZER_WEAK_ATTRIBUTE void *operator new(
    size_t size, std::nothrow_t const &) { … }
INTERCEPTOR_ATTRIBUTE SANITIZER_WEAK_ATTRIBUTE void *operator new[](
    size_t size, std::nothrow_t const &) { … }

INTERCEPTOR_ATTRIBUTE SANITIZER_WEAK_ATTRIBUTE void operator delete(
    void *ptr) NOEXCEPT { … }
INTERCEPTOR_ATTRIBUTE SANITIZER_WEAK_ATTRIBUTE void operator delete[](
    void *ptr) NOEXCEPT { … }
INTERCEPTOR_ATTRIBUTE SANITIZER_WEAK_ATTRIBUTE void operator delete(
    void *ptr, std::nothrow_t const &) { … }
INTERCEPTOR_ATTRIBUTE SANITIZER_WEAK_ATTRIBUTE void operator delete[](
    void *ptr, std::nothrow_t const &) { … }
INTERCEPTOR_ATTRIBUTE SANITIZER_WEAK_ATTRIBUTE void operator delete(
    void *ptr, size_t) NOEXCEPT { … }
INTERCEPTOR_ATTRIBUTE SANITIZER_WEAK_ATTRIBUTE void operator delete[](
    void *ptr, size_t) NOEXCEPT { … }

#endif  // OPERATOR_NEW_BODY

#ifdef OPERATOR_NEW_ALIGN_BODY

namespace std {
enum class align_val_t : size_t { … };
}  // namespace std

INTERCEPTOR_ATTRIBUTE SANITIZER_WEAK_ATTRIBUTE void *operator new(
    size_t size, std::align_val_t align) { … }
INTERCEPTOR_ATTRIBUTE SANITIZER_WEAK_ATTRIBUTE void *operator new[](
    size_t size, std::align_val_t align) { … }
INTERCEPTOR_ATTRIBUTE SANITIZER_WEAK_ATTRIBUTE void *operator new(
    size_t size, std::align_val_t align, std::nothrow_t const &) { … }
INTERCEPTOR_ATTRIBUTE SANITIZER_WEAK_ATTRIBUTE void *operator new[](
    size_t size, std::align_val_t align, std::nothrow_t const &) { … }

INTERCEPTOR_ATTRIBUTE SANITIZER_WEAK_ATTRIBUTE void operator delete(
    void *ptr, std::align_val_t align) NOEXCEPT { … }
INTERCEPTOR_ATTRIBUTE SANITIZER_WEAK_ATTRIBUTE void operator delete[](
    void *ptr, std::align_val_t) NOEXCEPT { … }
INTERCEPTOR_ATTRIBUTE SANITIZER_WEAK_ATTRIBUTE void operator delete(
    void *ptr, std::align_val_t, std::nothrow_t const &) NOEXCEPT { … }
INTERCEPTOR_ATTRIBUTE SANITIZER_WEAK_ATTRIBUTE void operator delete[](
    void *ptr, std::align_val_t, std::nothrow_t const &) NOEXCEPT { … }
INTERCEPTOR_ATTRIBUTE SANITIZER_WEAK_ATTRIBUTE void operator delete(
    void *ptr, size_t, std::align_val_t) NOEXCEPT { … }
INTERCEPTOR_ATTRIBUTE SANITIZER_WEAK_ATTRIBUTE void operator delete[](
    void *ptr, size_t, std::align_val_t) NOEXCEPT { … }
INTERCEPTOR_ATTRIBUTE SANITIZER_WEAK_ATTRIBUTE void operator delete(
    void *ptr, size_t, std::align_val_t, std::nothrow_t const &) NOEXCEPT { … }
INTERCEPTOR_ATTRIBUTE SANITIZER_WEAK_ATTRIBUTE void operator delete[](
    void *ptr, size_t, std::align_val_t, std::nothrow_t const &) NOEXCEPT { … }

#endif  // OPERATOR_NEW_ALIGN_BODY