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//===-- 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) \
GET_MALLOC_STACK_TRACE; \
void *res = hwasan_malloc(size, &stack);\
if (!nothrow && UNLIKELY(!res)) ReportOutOfMemory(size, &stack);\
return res
#define OPERATOR_NEW_ALIGN_BODY(nothrow) \
GET_MALLOC_STACK_TRACE; \
void *res = hwasan_aligned_alloc(static_cast<uptr>(align), size, &stack); \
if (!nothrow && UNLIKELY(!res)) \
ReportOutOfMemory(size, &stack); \
return res
#define OPERATOR_DELETE_BODY \
GET_MALLOC_STACK_TRACE; \
if (ptr) hwasan_free(ptr, &stack)
#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(nothrow) return malloc(size)
#define OPERATOR_DELETE_BODY free(ptr)
#endif
#ifdef OPERATOR_NEW_BODY
using namespace __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) { OPERATOR_NEW_BODY(false /*nothrow*/); }
INTERCEPTOR_ATTRIBUTE SANITIZER_WEAK_ATTRIBUTE
void *operator new[](size_t size) { OPERATOR_NEW_BODY(false /*nothrow*/); }
INTERCEPTOR_ATTRIBUTE SANITIZER_WEAK_ATTRIBUTE
void *operator new(size_t size, std::nothrow_t const&) {
OPERATOR_NEW_BODY(true /*nothrow*/);
}
INTERCEPTOR_ATTRIBUTE SANITIZER_WEAK_ATTRIBUTE
void *operator new[](size_t size, std::nothrow_t const&) {
OPERATOR_NEW_BODY(true /*nothrow*/);
}
INTERCEPTOR_ATTRIBUTE SANITIZER_WEAK_ATTRIBUTE void operator delete(void *ptr)
NOEXCEPT {
OPERATOR_DELETE_BODY;
}
INTERCEPTOR_ATTRIBUTE SANITIZER_WEAK_ATTRIBUTE void operator delete[](
void *ptr) NOEXCEPT {
OPERATOR_DELETE_BODY;
}
INTERCEPTOR_ATTRIBUTE SANITIZER_WEAK_ATTRIBUTE void operator delete(
void *ptr, std::nothrow_t const &) {
OPERATOR_DELETE_BODY;
}
INTERCEPTOR_ATTRIBUTE SANITIZER_WEAK_ATTRIBUTE void operator delete[](
void *ptr, std::nothrow_t const &) {
OPERATOR_DELETE_BODY;
}
#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) {
OPERATOR_NEW_ALIGN_BODY(false /*nothrow*/);
}
INTERCEPTOR_ATTRIBUTE SANITIZER_WEAK_ATTRIBUTE void *operator new[](
size_t size, std::align_val_t align) {
OPERATOR_NEW_ALIGN_BODY(false /*nothrow*/);
}
INTERCEPTOR_ATTRIBUTE SANITIZER_WEAK_ATTRIBUTE void *operator new(
size_t size, std::align_val_t align, std::nothrow_t const &) {
OPERATOR_NEW_ALIGN_BODY(true /*nothrow*/);
}
INTERCEPTOR_ATTRIBUTE SANITIZER_WEAK_ATTRIBUTE void *operator new[](
size_t size, std::align_val_t align, std::nothrow_t const &) {
OPERATOR_NEW_ALIGN_BODY(true /*nothrow*/);
}
INTERCEPTOR_ATTRIBUTE SANITIZER_WEAK_ATTRIBUTE void operator delete(
void *ptr, std::align_val_t align) NOEXCEPT {
OPERATOR_DELETE_BODY;
}
INTERCEPTOR_ATTRIBUTE SANITIZER_WEAK_ATTRIBUTE void operator delete[](
void *ptr, std::align_val_t) NOEXCEPT {
OPERATOR_DELETE_BODY;
}
INTERCEPTOR_ATTRIBUTE SANITIZER_WEAK_ATTRIBUTE void operator delete(
void *ptr, std::align_val_t, std::nothrow_t const &) NOEXCEPT {
OPERATOR_DELETE_BODY;
}
INTERCEPTOR_ATTRIBUTE SANITIZER_WEAK_ATTRIBUTE void operator delete[](
void *ptr, std::align_val_t, std::nothrow_t const &) NOEXCEPT {
OPERATOR_DELETE_BODY;
}
#endif // OPERATOR_NEW_ALIGN_BODY
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