1 //===-- asan_interceptors.cc ----------------------------------------------===// 2 // 3 // This file is distributed under the University of Illinois Open Source 4 // License. See LICENSE.TXT for details. 5 // 6 //===----------------------------------------------------------------------===// 7 // 8 // This file is a part of AddressSanitizer, an address sanity checker. 9 // 10 // Interceptors for operators new and delete. 11 //===----------------------------------------------------------------------===// 12 13 #include "asan_allocator.h" 14 #include "asan_internal.h" 15 #include "asan_stack.h" 16 17 #include <stddef.h> 18 19 namespace __asan { 20 // This function is a no-op. We need it to make sure that object file 21 // with our replacements will actually be loaded from static ASan 22 // run-time library at link-time. 23 void ReplaceOperatorsNewAndDelete() { } 24 } 25 26 using namespace __asan; // NOLINT 27 28 // On Android new() goes through malloc interceptors. 29 // See also https://code.google.com/p/address-sanitizer/issues/detail?id=131. 30 #if !ASAN_ANDROID 31 32 // Fake std::nothrow_t to avoid including <new>. 33 namespace std { 34 struct nothrow_t {}; 35 } // namespace std 36 37 #define OPERATOR_NEW_BODY(type) \ 38 GET_STACK_TRACE_MALLOC;\ 39 return asan_memalign(0, size, &stack, type); 40 41 INTERCEPTOR_ATTRIBUTE 42 void *operator new(size_t size) { OPERATOR_NEW_BODY(FROM_NEW); } 43 INTERCEPTOR_ATTRIBUTE 44 void *operator new[](size_t size) { OPERATOR_NEW_BODY(FROM_NEW_BR); } 45 INTERCEPTOR_ATTRIBUTE 46 void *operator new(size_t size, std::nothrow_t const&) 47 { OPERATOR_NEW_BODY(FROM_NEW); } 48 INTERCEPTOR_ATTRIBUTE 49 void *operator new[](size_t size, std::nothrow_t const&) 50 { OPERATOR_NEW_BODY(FROM_NEW_BR); } 51 52 #define OPERATOR_DELETE_BODY(type) \ 53 GET_STACK_TRACE_FREE;\ 54 asan_free(ptr, &stack, type); 55 56 INTERCEPTOR_ATTRIBUTE 57 void operator delete(void *ptr) { OPERATOR_DELETE_BODY(FROM_NEW); } 58 INTERCEPTOR_ATTRIBUTE 59 void operator delete[](void *ptr) { OPERATOR_DELETE_BODY(FROM_NEW_BR); } 60 INTERCEPTOR_ATTRIBUTE 61 void operator delete(void *ptr, std::nothrow_t const&) 62 { OPERATOR_DELETE_BODY(FROM_NEW); } 63 INTERCEPTOR_ATTRIBUTE 64 void operator delete[](void *ptr, std::nothrow_t const&) 65 { OPERATOR_DELETE_BODY(FROM_NEW_BR); } 66 67 #endif 68