131 lines
4.0 KiB
C++
131 lines
4.0 KiB
C++
//===-- asan_interceptors.cc ----------------------------------------------===//
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file is a part of AddressSanitizer, an address sanity checker.
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//
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// Interceptors for operators new and delete.
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//===----------------------------------------------------------------------===//
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#include "asan_allocator.h"
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#include "asan_internal.h"
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#include "asan_stack.h"
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#include "sanitizer_common/sanitizer_interception.h"
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#include <stddef.h>
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// C++ operators can't have visibility attributes on Windows.
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#if SANITIZER_WINDOWS
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# define CXX_OPERATOR_ATTRIBUTE
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#else
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# define CXX_OPERATOR_ATTRIBUTE INTERCEPTOR_ATTRIBUTE
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#endif
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using namespace __asan; // NOLINT
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// This code has issues on OSX.
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// See https://code.google.com/p/address-sanitizer/issues/detail?id=131.
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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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#define OPERATOR_NEW_BODY(type) \
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GET_STACK_TRACE_MALLOC;\
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return asan_memalign(0, size, &stack, type);
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// On OS X it's not enough to just provide our own 'operator new' and
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// 'operator delete' implementations, because they're going to be in the
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// runtime dylib, and the main executable will depend on both the runtime
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// dylib and libstdc++, each of those'll have its implementation of new and
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// delete.
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// To make sure that C++ allocation/deallocation operators are overridden on
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// OS X we need to intercept them using their mangled names.
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#if !SANITIZER_MAC
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// FreeBSD prior v9.2 have wrong definition of 'size_t'.
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// http://svnweb.freebsd.org/base?view=revision&revision=232261
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#if SANITIZER_FREEBSD && SANITIZER_WORDSIZE == 32
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#include <sys/param.h>
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#if __FreeBSD_version <= 902001 // v9.2
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#define size_t unsigned
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#endif // __FreeBSD_version
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#endif // SANITIZER_FREEBSD && SANITIZER_WORDSIZE == 32
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CXX_OPERATOR_ATTRIBUTE
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void *operator new(size_t size) { OPERATOR_NEW_BODY(FROM_NEW); }
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CXX_OPERATOR_ATTRIBUTE
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void *operator new[](size_t size) { OPERATOR_NEW_BODY(FROM_NEW_BR); }
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CXX_OPERATOR_ATTRIBUTE
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void *operator new(size_t size, std::nothrow_t const&)
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{ OPERATOR_NEW_BODY(FROM_NEW); }
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CXX_OPERATOR_ATTRIBUTE
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void *operator new[](size_t size, std::nothrow_t const&)
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{ OPERATOR_NEW_BODY(FROM_NEW_BR); }
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#else // SANITIZER_MAC
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INTERCEPTOR(void *, _Znwm, size_t size) {
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OPERATOR_NEW_BODY(FROM_NEW);
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}
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INTERCEPTOR(void *, _Znam, size_t size) {
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OPERATOR_NEW_BODY(FROM_NEW_BR);
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}
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INTERCEPTOR(void *, _ZnwmRKSt9nothrow_t, size_t size, std::nothrow_t const&) {
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OPERATOR_NEW_BODY(FROM_NEW);
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}
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INTERCEPTOR(void *, _ZnamRKSt9nothrow_t, size_t size, std::nothrow_t const&) {
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OPERATOR_NEW_BODY(FROM_NEW_BR);
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}
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#endif
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#define OPERATOR_DELETE_BODY(type) \
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GET_STACK_TRACE_FREE;\
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asan_free(ptr, &stack, type);
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#if !SANITIZER_MAC
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CXX_OPERATOR_ATTRIBUTE
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void operator delete(void *ptr) throw() {
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OPERATOR_DELETE_BODY(FROM_NEW);
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}
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CXX_OPERATOR_ATTRIBUTE
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void operator delete[](void *ptr) throw() {
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OPERATOR_DELETE_BODY(FROM_NEW_BR);
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}
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CXX_OPERATOR_ATTRIBUTE
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void operator delete(void *ptr, std::nothrow_t const&) {
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OPERATOR_DELETE_BODY(FROM_NEW);
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}
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CXX_OPERATOR_ATTRIBUTE
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void operator delete[](void *ptr, std::nothrow_t const&) {
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OPERATOR_DELETE_BODY(FROM_NEW_BR);
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}
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CXX_OPERATOR_ATTRIBUTE
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void operator delete(void *ptr, size_t size) throw() {
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GET_STACK_TRACE_FREE;
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asan_sized_free(ptr, size, &stack, FROM_NEW);
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}
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CXX_OPERATOR_ATTRIBUTE
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void operator delete[](void *ptr, size_t size) throw() {
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GET_STACK_TRACE_FREE;
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asan_sized_free(ptr, size, &stack, FROM_NEW_BR);
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}
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#else // SANITIZER_MAC
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INTERCEPTOR(void, _ZdlPv, void *ptr) {
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OPERATOR_DELETE_BODY(FROM_NEW);
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}
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INTERCEPTOR(void, _ZdaPv, void *ptr) {
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OPERATOR_DELETE_BODY(FROM_NEW_BR);
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}
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INTERCEPTOR(void, _ZdlPvRKSt9nothrow_t, void *ptr, std::nothrow_t const&) {
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OPERATOR_DELETE_BODY(FROM_NEW);
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}
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INTERCEPTOR(void, _ZdaPvRKSt9nothrow_t, void *ptr, std::nothrow_t const&) {
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OPERATOR_DELETE_BODY(FROM_NEW_BR);
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}
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#endif
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