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//===-- msan_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 MemorySanitizer.
//
// Interceptors for operators new and delete.
//===----------------------------------------------------------------------===//
#include "msan.h"
#include "interception/interception.h"
#include "sanitizer_common/sanitizer_allocator.h"
#include "sanitizer_common/sanitizer_allocator_report.h"
#if MSAN_REPLACE_OPERATORS_NEW_AND_DELETE
#include <stddef.h>
using namespace __msan;
// Fake std::nothrow_t and std::align_val_t to avoid including <new>.
namespace std {
struct nothrow_t {};
enum class align_val_t: size_t {};
} // namespace std
// TODO(alekseys): throw std::bad_alloc instead of dying on OOM.
# define OPERATOR_NEW_BODY(nothrow) \
GET_MALLOC_STACK_TRACE; \
void *res = msan_malloc(size, &stack); \
if (!nothrow && UNLIKELY(!res)) { \
GET_FATAL_STACK_TRACE_IF_EMPTY(&stack); \
ReportOutOfMemory(size, &stack); \
} \
return res
# define OPERATOR_NEW_BODY_ALIGN(nothrow) \
GET_MALLOC_STACK_TRACE; \
void *res = msan_memalign((uptr)align, size, &stack); \
if (!nothrow && UNLIKELY(!res)) { \
GET_FATAL_STACK_TRACE_IF_EMPTY(&stack); \
ReportOutOfMemory(size, &stack); \
} \
return res;
INTERCEPTOR_ATTRIBUTE
void *operator new(size_t size) { OPERATOR_NEW_BODY(false /*nothrow*/); }
INTERCEPTOR_ATTRIBUTE
void *operator new[](size_t size) { OPERATOR_NEW_BODY(false /*nothrow*/); }
INTERCEPTOR_ATTRIBUTE
void *operator new(size_t size, std::nothrow_t const&) {
OPERATOR_NEW_BODY(true /*nothrow*/);
}
INTERCEPTOR_ATTRIBUTE
void *operator new[](size_t size, std::nothrow_t const&) {
OPERATOR_NEW_BODY(true /*nothrow*/);
}
INTERCEPTOR_ATTRIBUTE
void *operator new(size_t size, std::align_val_t align)
{ OPERATOR_NEW_BODY_ALIGN(false /*nothrow*/); }
INTERCEPTOR_ATTRIBUTE
void *operator new[](size_t size, std::align_val_t align)
{ OPERATOR_NEW_BODY_ALIGN(false /*nothrow*/); }
INTERCEPTOR_ATTRIBUTE
void *operator new(size_t size, std::align_val_t align, std::nothrow_t const&)
{ OPERATOR_NEW_BODY_ALIGN(true /*nothrow*/); }
INTERCEPTOR_ATTRIBUTE
void *operator new[](size_t size, std::align_val_t align, std::nothrow_t const&)
{ OPERATOR_NEW_BODY_ALIGN(true /*nothrow*/); }
#define OPERATOR_DELETE_BODY \
GET_MALLOC_STACK_TRACE; \
if (ptr) MsanDeallocate(&stack, ptr)
INTERCEPTOR_ATTRIBUTE
void operator delete(void *ptr) NOEXCEPT { OPERATOR_DELETE_BODY; }
INTERCEPTOR_ATTRIBUTE
void operator delete[](void *ptr) NOEXCEPT { OPERATOR_DELETE_BODY; }
INTERCEPTOR_ATTRIBUTE
void operator delete(void *ptr, std::nothrow_t const&) { OPERATOR_DELETE_BODY; }
INTERCEPTOR_ATTRIBUTE
void operator delete[](void *ptr, std::nothrow_t const&) {
OPERATOR_DELETE_BODY;
}
INTERCEPTOR_ATTRIBUTE
void operator delete(void *ptr, size_t size) NOEXCEPT { OPERATOR_DELETE_BODY; }
INTERCEPTOR_ATTRIBUTE
void operator delete[](void *ptr, size_t size) NOEXCEPT
{ OPERATOR_DELETE_BODY; }
INTERCEPTOR_ATTRIBUTE
void operator delete(void *ptr, std::align_val_t align) NOEXCEPT
{ OPERATOR_DELETE_BODY; }
INTERCEPTOR_ATTRIBUTE
void operator delete[](void *ptr, std::align_val_t align) NOEXCEPT
{ OPERATOR_DELETE_BODY; }
INTERCEPTOR_ATTRIBUTE
void operator delete(void *ptr, std::align_val_t align, std::nothrow_t const&)
{ OPERATOR_DELETE_BODY; }
INTERCEPTOR_ATTRIBUTE
void operator delete[](void *ptr, std::align_val_t align, std::nothrow_t const&)
{ OPERATOR_DELETE_BODY; }
INTERCEPTOR_ATTRIBUTE
void operator delete(void *ptr, size_t size, std::align_val_t align) NOEXCEPT
{ OPERATOR_DELETE_BODY; }
INTERCEPTOR_ATTRIBUTE
void operator delete[](void *ptr, size_t size, std::align_val_t align) NOEXCEPT
{ OPERATOR_DELETE_BODY; }
#endif // MSAN_REPLACE_OPERATORS_NEW_AND_DELETE
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