1ee3d1ef10
Introduce the libhwasan library from LLVM sources.
82 lines
2.7 KiB
C++
82 lines
2.7 KiB
C++
//===-- hwasan_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 HWAddressSanitizer.
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//
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// Interceptors for operators new and delete.
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//===----------------------------------------------------------------------===//
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#include "hwasan.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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#include <stddef.h>
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#include <stdlib.h>
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#if HWASAN_REPLACE_OPERATORS_NEW_AND_DELETE
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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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GET_MALLOC_STACK_TRACE; \
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void *res = hwasan_malloc(size, &stack);\
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if (!nothrow && UNLIKELY(!res)) ReportOutOfMemory(size, &stack);\
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return res
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#define OPERATOR_DELETE_BODY \
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GET_MALLOC_STACK_TRACE; \
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if (ptr) hwasan_free(ptr, &stack)
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#elif defined(__ANDROID__)
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// We don't actually want to intercept operator new and delete on Android, but
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// since we previously released a runtime that intercepted these functions,
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// removing the interceptors would break ABI. Therefore we simply forward to
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// malloc and free.
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#define OPERATOR_NEW_BODY(nothrow) return malloc(size)
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#define OPERATOR_DELETE_BODY free(ptr)
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#endif
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#ifdef OPERATOR_NEW_BODY
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using namespace __hwasan;
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// Fake std::nothrow_t to avoid including <new>.
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namespace std {
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struct nothrow_t {};
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} // namespace std
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INTERCEPTOR_ATTRIBUTE SANITIZER_WEAK_ATTRIBUTE
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void *operator new(size_t size) { OPERATOR_NEW_BODY(false /*nothrow*/); }
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INTERCEPTOR_ATTRIBUTE SANITIZER_WEAK_ATTRIBUTE
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void *operator new[](size_t size) { OPERATOR_NEW_BODY(false /*nothrow*/); }
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INTERCEPTOR_ATTRIBUTE SANITIZER_WEAK_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 SANITIZER_WEAK_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 SANITIZER_WEAK_ATTRIBUTE
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void operator delete(void *ptr) NOEXCEPT { OPERATOR_DELETE_BODY; }
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INTERCEPTOR_ATTRIBUTE SANITIZER_WEAK_ATTRIBUTE
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void operator delete[](void *ptr) NOEXCEPT { OPERATOR_DELETE_BODY; }
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INTERCEPTOR_ATTRIBUTE SANITIZER_WEAK_ATTRIBUTE
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void operator delete(void *ptr, std::nothrow_t const&) { OPERATOR_DELETE_BODY; }
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INTERCEPTOR_ATTRIBUTE SANITIZER_WEAK_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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#endif // OPERATOR_NEW_BODY
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