| //===-- asan_interceptors.cc ----------------------------------------------===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This file is a part of AddressSanitizer, an address sanity checker. |
| // |
| // Interceptors for operators new and delete. |
| //===----------------------------------------------------------------------===// |
| |
| #include "asan_allocator.h" |
| #include "asan_internal.h" |
| #include "asan_malloc_local.h" |
| #include "asan_report.h" |
| #include "asan_stack.h" |
| |
| #include "interception/interception.h" |
| |
| #include <stddef.h> |
| |
| // C++ operators can't have dllexport attributes on Windows. We export them |
| // anyway by passing extra -export flags to the linker, which is exactly that |
| // dllexport would normally do. We need to export them in order to make the |
| // VS2015 dynamic CRT (MD) work. |
| #if SANITIZER_WINDOWS |
| #define CXX_OPERATOR_ATTRIBUTE |
| #define COMMENT_EXPORT(sym) __pragma(comment(linker, "/export:" sym)) |
| #ifdef _WIN64 |
| COMMENT_EXPORT("??2@YAPEAX_K@Z") // operator new |
| COMMENT_EXPORT("??2@YAPEAX_KAEBUnothrow_t@std@@@Z") // operator new nothrow |
| COMMENT_EXPORT("??3@YAXPEAX@Z") // operator delete |
| COMMENT_EXPORT("??3@YAXPEAX_K@Z") // sized operator delete |
| COMMENT_EXPORT("??_U@YAPEAX_K@Z") // operator new[] |
| COMMENT_EXPORT("??_V@YAXPEAX@Z") // operator delete[] |
| #else |
| COMMENT_EXPORT("??2@YAPAXI@Z") // operator new |
| COMMENT_EXPORT("??2@YAPAXIABUnothrow_t@std@@@Z") // operator new nothrow |
| COMMENT_EXPORT("??3@YAXPAX@Z") // operator delete |
| COMMENT_EXPORT("??3@YAXPAXI@Z") // sized operator delete |
| COMMENT_EXPORT("??_U@YAPAXI@Z") // operator new[] |
| COMMENT_EXPORT("??_V@YAXPAX@Z") // operator delete[] |
| #endif |
| #undef COMMENT_EXPORT |
| #else |
| #define CXX_OPERATOR_ATTRIBUTE INTERCEPTOR_ATTRIBUTE |
| #endif |
| |
| using namespace __asan; // NOLINT |
| |
| // FreeBSD prior v9.2 have wrong definition of 'size_t'. |
| // http://svnweb.freebsd.org/base?view=revision&revision=232261 |
| #if SANITIZER_FREEBSD && SANITIZER_WORDSIZE == 32 |
| #include <sys/param.h> |
| #if __FreeBSD_version <= 902001 // v9.2 |
| #define size_t unsigned |
| #endif // __FreeBSD_version |
| #endif // SANITIZER_FREEBSD && SANITIZER_WORDSIZE == 32 |
| |
| // This code has issues on OSX. |
| // See https://github.com/google/sanitizers/issues/131. |
| |
| // 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(alekseyshl): throw std::bad_alloc instead of dying on OOM. |
| // For local pool allocation, align to SHADOW_GRANULARITY to match asan |
| // allocator behavior. |
| #define OPERATOR_NEW_BODY(type, nothrow) \ |
| if (ALLOCATE_FROM_LOCAL_POOL) {\ |
| void *res = MemalignFromLocalPool(SHADOW_GRANULARITY, size);\ |
| if (!nothrow) CHECK(res);\ |
| return res;\ |
| }\ |
| GET_STACK_TRACE_MALLOC;\ |
| void *res = asan_memalign(0, size, &stack, type);\ |
| if (!nothrow && UNLIKELY(!res)) ReportOutOfMemory(size, &stack);\ |
| return res; |
| #define OPERATOR_NEW_BODY_ALIGN(type, nothrow) \ |
| if (ALLOCATE_FROM_LOCAL_POOL) {\ |
| void *res = MemalignFromLocalPool((uptr)align, size);\ |
| if (!nothrow) CHECK(res);\ |
| return res;\ |
| }\ |
| GET_STACK_TRACE_MALLOC;\ |
| void *res = asan_memalign((uptr)align, size, &stack, type);\ |
| if (!nothrow && UNLIKELY(!res)) ReportOutOfMemory(size, &stack);\ |
| return res; |
| |
| // On OS X it's not enough to just provide our own 'operator new' and |
| // 'operator delete' implementations, because they're going to be in the |
| // runtime dylib, and the main executable will depend on both the runtime |
| // dylib and libstdc++, each of those'll have its implementation of new and |
| // delete. |
| // To make sure that C++ allocation/deallocation operators are overridden on |
| // OS X we need to intercept them using their mangled names. |
| #if !SANITIZER_MAC |
| CXX_OPERATOR_ATTRIBUTE |
| void *operator new(size_t size) |
| { OPERATOR_NEW_BODY(FROM_NEW, false /*nothrow*/); } |
| CXX_OPERATOR_ATTRIBUTE |
| void *operator new[](size_t size) |
| { OPERATOR_NEW_BODY(FROM_NEW_BR, false /*nothrow*/); } |
| CXX_OPERATOR_ATTRIBUTE |
| void *operator new(size_t size, std::nothrow_t const&) |
| { OPERATOR_NEW_BODY(FROM_NEW, true /*nothrow*/); } |
| CXX_OPERATOR_ATTRIBUTE |
| void *operator new[](size_t size, std::nothrow_t const&) |
| { OPERATOR_NEW_BODY(FROM_NEW_BR, true /*nothrow*/); } |
| CXX_OPERATOR_ATTRIBUTE |
| void *operator new(size_t size, std::align_val_t align) |
| { OPERATOR_NEW_BODY_ALIGN(FROM_NEW, false /*nothrow*/); } |
| CXX_OPERATOR_ATTRIBUTE |
| void *operator new[](size_t size, std::align_val_t align) |
| { OPERATOR_NEW_BODY_ALIGN(FROM_NEW_BR, false /*nothrow*/); } |
| CXX_OPERATOR_ATTRIBUTE |
| void *operator new(size_t size, std::align_val_t align, std::nothrow_t const&) |
| { OPERATOR_NEW_BODY_ALIGN(FROM_NEW, true /*nothrow*/); } |
| CXX_OPERATOR_ATTRIBUTE |
| void *operator new[](size_t size, std::align_val_t align, std::nothrow_t const&) |
| { OPERATOR_NEW_BODY_ALIGN(FROM_NEW_BR, true /*nothrow*/); } |
| |
| #else // SANITIZER_MAC |
| INTERCEPTOR(void *, _Znwm, size_t size) { |
| OPERATOR_NEW_BODY(FROM_NEW, false /*nothrow*/); |
| } |
| INTERCEPTOR(void *, _Znam, size_t size) { |
| OPERATOR_NEW_BODY(FROM_NEW_BR, false /*nothrow*/); |
| } |
| INTERCEPTOR(void *, _ZnwmRKSt9nothrow_t, size_t size, std::nothrow_t const&) { |
| OPERATOR_NEW_BODY(FROM_NEW, true /*nothrow*/); |
| } |
| INTERCEPTOR(void *, _ZnamRKSt9nothrow_t, size_t size, std::nothrow_t const&) { |
| OPERATOR_NEW_BODY(FROM_NEW_BR, true /*nothrow*/); |
| } |
| #endif // !SANITIZER_MAC |
| |
| #define OPERATOR_DELETE_BODY(type) \ |
| if (IS_FROM_LOCAL_POOL(ptr)) return;\ |
| GET_STACK_TRACE_FREE;\ |
| asan_delete(ptr, 0, 0, &stack, type); |
| |
| #define OPERATOR_DELETE_BODY_SIZE(type) \ |
| if (IS_FROM_LOCAL_POOL(ptr)) return;\ |
| GET_STACK_TRACE_FREE;\ |
| asan_delete(ptr, size, 0, &stack, type); |
| |
| #define OPERATOR_DELETE_BODY_ALIGN(type) \ |
| if (IS_FROM_LOCAL_POOL(ptr)) return;\ |
| GET_STACK_TRACE_FREE;\ |
| asan_delete(ptr, 0, static_cast<uptr>(align), &stack, type); |
| |
| #define OPERATOR_DELETE_BODY_SIZE_ALIGN(type) \ |
| if (IS_FROM_LOCAL_POOL(ptr)) return;\ |
| GET_STACK_TRACE_FREE;\ |
| asan_delete(ptr, size, static_cast<uptr>(align), &stack, type); |
| |
| #if !SANITIZER_MAC |
| CXX_OPERATOR_ATTRIBUTE |
| void operator delete(void *ptr) NOEXCEPT |
| { OPERATOR_DELETE_BODY(FROM_NEW); } |
| CXX_OPERATOR_ATTRIBUTE |
| void operator delete[](void *ptr) NOEXCEPT |
| { OPERATOR_DELETE_BODY(FROM_NEW_BR); } |
| CXX_OPERATOR_ATTRIBUTE |
| void operator delete(void *ptr, std::nothrow_t const&) |
| { OPERATOR_DELETE_BODY(FROM_NEW); } |
| CXX_OPERATOR_ATTRIBUTE |
| void operator delete[](void *ptr, std::nothrow_t const&) |
| { OPERATOR_DELETE_BODY(FROM_NEW_BR); } |
| CXX_OPERATOR_ATTRIBUTE |
| void operator delete(void *ptr, size_t size) NOEXCEPT |
| { OPERATOR_DELETE_BODY_SIZE(FROM_NEW); } |
| CXX_OPERATOR_ATTRIBUTE |
| void operator delete[](void *ptr, size_t size) NOEXCEPT |
| { OPERATOR_DELETE_BODY_SIZE(FROM_NEW_BR); } |
| CXX_OPERATOR_ATTRIBUTE |
| void operator delete(void *ptr, std::align_val_t align) NOEXCEPT |
| { OPERATOR_DELETE_BODY_ALIGN(FROM_NEW); } |
| CXX_OPERATOR_ATTRIBUTE |
| void operator delete[](void *ptr, std::align_val_t align) NOEXCEPT |
| { OPERATOR_DELETE_BODY_ALIGN(FROM_NEW_BR); } |
| CXX_OPERATOR_ATTRIBUTE |
| void operator delete(void *ptr, std::align_val_t align, std::nothrow_t const&) |
| { OPERATOR_DELETE_BODY_ALIGN(FROM_NEW); } |
| CXX_OPERATOR_ATTRIBUTE |
| void operator delete[](void *ptr, std::align_val_t align, std::nothrow_t const&) |
| { OPERATOR_DELETE_BODY_ALIGN(FROM_NEW_BR); } |
| CXX_OPERATOR_ATTRIBUTE |
| void operator delete(void *ptr, size_t size, std::align_val_t align) NOEXCEPT |
| { OPERATOR_DELETE_BODY_SIZE_ALIGN(FROM_NEW); } |
| CXX_OPERATOR_ATTRIBUTE |
| void operator delete[](void *ptr, size_t size, std::align_val_t align) NOEXCEPT |
| { OPERATOR_DELETE_BODY_SIZE_ALIGN(FROM_NEW_BR); } |
| |
| #else // SANITIZER_MAC |
| INTERCEPTOR(void, _ZdlPv, void *ptr) |
| { OPERATOR_DELETE_BODY(FROM_NEW); } |
| INTERCEPTOR(void, _ZdaPv, void *ptr) |
| { OPERATOR_DELETE_BODY(FROM_NEW_BR); } |
| INTERCEPTOR(void, _ZdlPvRKSt9nothrow_t, void *ptr, std::nothrow_t const&) |
| { OPERATOR_DELETE_BODY(FROM_NEW); } |
| INTERCEPTOR(void, _ZdaPvRKSt9nothrow_t, void *ptr, std::nothrow_t const&) |
| { OPERATOR_DELETE_BODY(FROM_NEW_BR); } |
| #endif // !SANITIZER_MAC |