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//===-- dfsan_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 DataflowSanitizer.
//
// Interceptors for operators new and delete.
//===----------------------------------------------------------------------===//
#include <stddef.h>
#include "dfsan.h"
#include "interception/interception.h"
#include "sanitizer_common/sanitizer_allocator.h"
#include "sanitizer_common/sanitizer_allocator_report.h"
using namespace __dfsan;
// 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) \
void *res = dfsan_malloc(size); \
if (!nothrow && UNLIKELY(!res)) { \
BufferedStackTrace stack; \
ReportOutOfMemory(size, &stack); \
} \
return res
#define OPERATOR_NEW_BODY_ALIGN(nothrow) \
void *res = dfsan_memalign((uptr)align, size); \
if (!nothrow && UNLIKELY(!res)) { \
BufferedStackTrace 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 \
if (ptr) \
dfsan_deallocate(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;
}
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