| //===-- asan_malloc_win.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. |
| // |
| // Windows-specific malloc interception. |
| //===----------------------------------------------------------------------===// |
| |
| #include "sanitizer_common/sanitizer_platform.h" |
| #if SANITIZER_WINDOWS |
| |
| #include "asan_allocator.h" |
| #include "asan_interceptors.h" |
| #include "asan_internal.h" |
| #include "asan_stack.h" |
| #include "interception/interception.h" |
| |
| #include <stddef.h> |
| |
| using namespace __asan; // NOLINT |
| |
| // MT: Simply defining functions with the same signature in *.obj |
| // files overrides the standard functions in the CRT. |
| // MD: Memory allocation functions are defined in the CRT .dll, |
| // so we have to intercept them before they are called for the first time. |
| |
| #if ASAN_DYNAMIC |
| # define ALLOCATION_FUNCTION_ATTRIBUTE |
| #else |
| # define ALLOCATION_FUNCTION_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE |
| #endif |
| |
| extern "C" { |
| ALLOCATION_FUNCTION_ATTRIBUTE |
| void free(void *ptr) { |
| GET_STACK_TRACE_FREE; |
| return asan_free(ptr, &stack, FROM_MALLOC); |
| } |
| |
| ALLOCATION_FUNCTION_ATTRIBUTE |
| void _free_dbg(void *ptr, int) { |
| free(ptr); |
| } |
| |
| ALLOCATION_FUNCTION_ATTRIBUTE |
| void cfree(void *ptr) { |
| CHECK(!"cfree() should not be used on Windows"); |
| } |
| |
| ALLOCATION_FUNCTION_ATTRIBUTE |
| void *malloc(size_t size) { |
| GET_STACK_TRACE_MALLOC; |
| return asan_malloc(size, &stack); |
| } |
| |
| ALLOCATION_FUNCTION_ATTRIBUTE |
| void *_malloc_dbg(size_t size, int, const char *, int) { |
| return malloc(size); |
| } |
| |
| ALLOCATION_FUNCTION_ATTRIBUTE |
| void *calloc(size_t nmemb, size_t size) { |
| GET_STACK_TRACE_MALLOC; |
| return asan_calloc(nmemb, size, &stack); |
| } |
| |
| ALLOCATION_FUNCTION_ATTRIBUTE |
| void *_calloc_dbg(size_t nmemb, size_t size, int, const char *, int) { |
| return calloc(nmemb, size); |
| } |
| |
| ALLOCATION_FUNCTION_ATTRIBUTE |
| void *_calloc_impl(size_t nmemb, size_t size, int *errno_tmp) { |
| return calloc(nmemb, size); |
| } |
| |
| ALLOCATION_FUNCTION_ATTRIBUTE |
| void *realloc(void *ptr, size_t size) { |
| GET_STACK_TRACE_MALLOC; |
| return asan_realloc(ptr, size, &stack); |
| } |
| |
| ALLOCATION_FUNCTION_ATTRIBUTE |
| void *_realloc_dbg(void *ptr, size_t size, int) { |
| CHECK(!"_realloc_dbg should not exist!"); |
| return 0; |
| } |
| |
| ALLOCATION_FUNCTION_ATTRIBUTE |
| void *_recalloc(void *p, size_t n, size_t elem_size) { |
| if (!p) |
| return calloc(n, elem_size); |
| const size_t size = n * elem_size; |
| if (elem_size != 0 && size / elem_size != n) |
| return 0; |
| return realloc(p, size); |
| } |
| |
| ALLOCATION_FUNCTION_ATTRIBUTE |
| size_t _msize(void *ptr) { |
| GET_CURRENT_PC_BP_SP; |
| (void)sp; |
| return asan_malloc_usable_size(ptr, pc, bp); |
| } |
| |
| ALLOCATION_FUNCTION_ATTRIBUTE |
| void *_expand(void *memblock, size_t size) { |
| // _expand is used in realloc-like functions to resize the buffer if possible. |
| // We don't want memory to stand still while resizing buffers, so return 0. |
| return 0; |
| } |
| |
| ALLOCATION_FUNCTION_ATTRIBUTE |
| void *_expand_dbg(void *memblock, size_t size) { |
| return _expand(memblock, size); |
| } |
| |
| // TODO(timurrrr): Might want to add support for _aligned_* allocation |
| // functions to detect a bit more bugs. Those functions seem to wrap malloc(). |
| |
| int _CrtDbgReport(int, const char*, int, |
| const char*, const char*, ...) { |
| ShowStatsAndAbort(); |
| } |
| |
| int _CrtDbgReportW(int reportType, const wchar_t*, int, |
| const wchar_t*, const wchar_t*, ...) { |
| ShowStatsAndAbort(); |
| } |
| |
| int _CrtSetReportMode(int, int) { |
| return 0; |
| } |
| } // extern "C" |
| |
| namespace __asan { |
| void ReplaceSystemMalloc() { |
| #if defined(ASAN_DYNAMIC) |
| // We don't check the result because CRT might not be used in the process. |
| __interception::OverrideFunction("free", (uptr)free); |
| __interception::OverrideFunction("malloc", (uptr)malloc); |
| __interception::OverrideFunction("_malloc_crt", (uptr)malloc); |
| __interception::OverrideFunction("calloc", (uptr)calloc); |
| __interception::OverrideFunction("_calloc_crt", (uptr)calloc); |
| __interception::OverrideFunction("realloc", (uptr)realloc); |
| __interception::OverrideFunction("_realloc_crt", (uptr)realloc); |
| __interception::OverrideFunction("_recalloc", (uptr)_recalloc); |
| __interception::OverrideFunction("_recalloc_crt", (uptr)_recalloc); |
| __interception::OverrideFunction("_msize", (uptr)_msize); |
| __interception::OverrideFunction("_expand", (uptr)_expand); |
| |
| // Override different versions of 'operator new' and 'operator delete'. |
| // No need to override the nothrow versions as they just wrap the throw |
| // versions. |
| // FIXME: Unfortunately, MSVC miscompiles the statements that take the |
| // addresses of the array versions of these operators, |
| // see https://connect.microsoft.com/VisualStudio/feedbackdetail/view/946992 |
| // We might want to try to work around this by [inline] assembly or compiling |
| // parts of the RTL with Clang. |
| void *(*op_new)(size_t sz) = operator new; |
| void (*op_delete)(void *p) = operator delete; |
| void *(*op_array_new)(size_t sz) = operator new[]; |
| void (*op_array_delete)(void *p) = operator delete[]; |
| __interception::OverrideFunction("??2@YAPAXI@Z", (uptr)op_new); |
| __interception::OverrideFunction("??3@YAXPAX@Z", (uptr)op_delete); |
| __interception::OverrideFunction("??_U@YAPAXI@Z", (uptr)op_array_new); |
| __interception::OverrideFunction("??_V@YAXPAX@Z", (uptr)op_array_delete); |
| #endif |
| } |
| } // namespace __asan |
| |
| #endif // _WIN32 |