CoCalc -- dfsan_new

GitHub Repository: freebsd/freebsd-src
Path: blob/main/contrib/llvm-project/compiler-rt/lib/dfsan/dfsan_new_delete.cpp
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//===-- dfsan_new_delete.cpp ----------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This file is a part of DataflowSanitizer.
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//
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// Interceptors for operators new and delete.
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//===----------------------------------------------------------------------===//
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#include <stddef.h>
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#include "dfsan.h"
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#include "interception/interception.h"
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#include "sanitizer_common/sanitizer_allocator.h"
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#include "sanitizer_common/sanitizer_allocator_report.h"
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using namespace __dfsan;
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// Fake std::nothrow_t and std::align_val_t to avoid including <new>.
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namespace std {
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struct nothrow_t {};
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enum class align_val_t : size_t {};
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}  // namespace std
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// TODO(alekseys): throw std::bad_alloc instead of dying on OOM.
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#define OPERATOR_NEW_BODY(nothrow)   \
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  void *res = dfsan_malloc(size);    \
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  if (!nothrow && UNLIKELY(!res)) {  \
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    BufferedStackTrace stack;        \
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    ReportOutOfMemory(size, &stack); \
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  }                                  \
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  return res
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#define OPERATOR_NEW_BODY_ALIGN(nothrow)         \
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  void *res = dfsan_memalign((uptr)align, size); \
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  if (!nothrow && UNLIKELY(!res)) {              \
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    BufferedStackTrace stack;                    \
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    ReportOutOfMemory(size, &stack);             \
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  }                                              \
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  return res;
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INTERCEPTOR_ATTRIBUTE
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void *operator new(size_t size) { OPERATOR_NEW_BODY(false /*nothrow*/); }
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INTERCEPTOR_ATTRIBUTE
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void *operator new[](size_t size) { OPERATOR_NEW_BODY(false /*nothrow*/); }
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INTERCEPTOR_ATTRIBUTE
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void *operator new(size_t size, std::nothrow_t const &) {
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  OPERATOR_NEW_BODY(true /*nothrow*/);
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}
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INTERCEPTOR_ATTRIBUTE
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void *operator new[](size_t size, std::nothrow_t const &) {
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  OPERATOR_NEW_BODY(true /*nothrow*/);
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}
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INTERCEPTOR_ATTRIBUTE
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void *operator new(size_t size, std::align_val_t align) {
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  OPERATOR_NEW_BODY_ALIGN(false /*nothrow*/);
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}
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INTERCEPTOR_ATTRIBUTE
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void *operator new[](size_t size, std::align_val_t align) {
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  OPERATOR_NEW_BODY_ALIGN(false /*nothrow*/);
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}
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INTERCEPTOR_ATTRIBUTE
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void *operator new(size_t size, std::align_val_t align,
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                   std::nothrow_t const &) {
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  OPERATOR_NEW_BODY_ALIGN(true /*nothrow*/);
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}
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INTERCEPTOR_ATTRIBUTE
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void *operator new[](size_t size, std::align_val_t align,
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                     std::nothrow_t const &) {
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  OPERATOR_NEW_BODY_ALIGN(true /*nothrow*/);
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}
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#define OPERATOR_DELETE_BODY \
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  if (ptr)                   \
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  dfsan_deallocate(ptr)
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INTERCEPTOR_ATTRIBUTE
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void operator delete(void *ptr)NOEXCEPT { OPERATOR_DELETE_BODY; }
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INTERCEPTOR_ATTRIBUTE
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void operator delete[](void *ptr) NOEXCEPT { OPERATOR_DELETE_BODY; }
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INTERCEPTOR_ATTRIBUTE
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void operator delete(void *ptr, std::nothrow_t const &) {
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  OPERATOR_DELETE_BODY;
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}
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INTERCEPTOR_ATTRIBUTE
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void operator delete[](void *ptr, std::nothrow_t const &) {
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  OPERATOR_DELETE_BODY;
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}
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INTERCEPTOR_ATTRIBUTE
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void operator delete(void *ptr, size_t size)NOEXCEPT { OPERATOR_DELETE_BODY; }
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INTERCEPTOR_ATTRIBUTE
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void operator delete[](void *ptr, size_t size) NOEXCEPT {
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  OPERATOR_DELETE_BODY;
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}
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INTERCEPTOR_ATTRIBUTE
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void operator delete(void *ptr, std::align_val_t align)NOEXCEPT {
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  OPERATOR_DELETE_BODY;
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}
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INTERCEPTOR_ATTRIBUTE
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void operator delete[](void *ptr, std::align_val_t align) NOEXCEPT {
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  OPERATOR_DELETE_BODY;
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}
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INTERCEPTOR_ATTRIBUTE
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void operator delete(void *ptr, std::align_val_t align,
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                     std::nothrow_t const &) {
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  OPERATOR_DELETE_BODY;
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}
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INTERCEPTOR_ATTRIBUTE
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void operator delete[](void *ptr, std::align_val_t align,
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                       std::nothrow_t const &) {
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  OPERATOR_DELETE_BODY;
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}
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INTERCEPTOR_ATTRIBUTE
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void operator delete(void *ptr, size_t size, std::align_val_t align)NOEXCEPT {
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  OPERATOR_DELETE_BODY;
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}
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INTERCEPTOR_ATTRIBUTE
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void operator delete[](void *ptr, size_t size,
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                       std::align_val_t align) NOEXCEPT {
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  OPERATOR_DELETE_BODY;
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}
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