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Diffstat (limited to 'lib/asan/asan_win.cc')
| -rw-r--r-- | lib/asan/asan_win.cc | 348 |
1 files changed, 0 insertions, 348 deletions
diff --git a/lib/asan/asan_win.cc b/lib/asan/asan_win.cc deleted file mode 100644 index 67125d38ad4a3..0000000000000 --- a/lib/asan/asan_win.cc +++ /dev/null @@ -1,348 +0,0 @@ -//===-- asan_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 details. -//===----------------------------------------------------------------------===// - -#include "sanitizer_common/sanitizer_platform.h" -#if SANITIZER_WINDOWS -#define WIN32_LEAN_AND_MEAN -#include <windows.h> - -#include <stdlib.h> - -#include "asan_interceptors.h" -#include "asan_internal.h" -#include "asan_report.h" -#include "asan_stack.h" -#include "asan_thread.h" -#include "asan_mapping.h" -#include "sanitizer_common/sanitizer_libc.h" -#include "sanitizer_common/sanitizer_mutex.h" -#include "sanitizer_common/sanitizer_win.h" -#include "sanitizer_common/sanitizer_win_defs.h" - -using namespace __asan; // NOLINT - -extern "C" { -SANITIZER_INTERFACE_ATTRIBUTE -int __asan_should_detect_stack_use_after_return() { - __asan_init(); - return __asan_option_detect_stack_use_after_return; -} - -SANITIZER_INTERFACE_ATTRIBUTE -uptr __asan_get_shadow_memory_dynamic_address() { - __asan_init(); - return __asan_shadow_memory_dynamic_address; -} -} // extern "C" - -// ---------------------- Windows-specific interceptors ---------------- {{{ -static LPTOP_LEVEL_EXCEPTION_FILTER default_seh_handler; -static LPTOP_LEVEL_EXCEPTION_FILTER user_seh_handler; - -extern "C" SANITIZER_INTERFACE_ATTRIBUTE -long __asan_unhandled_exception_filter(EXCEPTION_POINTERS *info) { - EXCEPTION_RECORD *exception_record = info->ExceptionRecord; - CONTEXT *context = info->ContextRecord; - - // FIXME: Handle EXCEPTION_STACK_OVERFLOW here. - - SignalContext sig(exception_record, context); - ReportDeadlySignal(sig); - UNREACHABLE("returned from reporting deadly signal"); -} - -// Wrapper SEH Handler. If the exception should be handled by asan, we call -// __asan_unhandled_exception_filter, otherwise, we execute the user provided -// exception handler or the default. -static long WINAPI SEHHandler(EXCEPTION_POINTERS *info) { - DWORD exception_code = info->ExceptionRecord->ExceptionCode; - if (__sanitizer::IsHandledDeadlyException(exception_code)) - return __asan_unhandled_exception_filter(info); - if (user_seh_handler) - return user_seh_handler(info); - // Bubble out to the default exception filter. - if (default_seh_handler) - return default_seh_handler(info); - return EXCEPTION_CONTINUE_SEARCH; -} - -INTERCEPTOR_WINAPI(LPTOP_LEVEL_EXCEPTION_FILTER, SetUnhandledExceptionFilter, - LPTOP_LEVEL_EXCEPTION_FILTER ExceptionFilter) { - CHECK(REAL(SetUnhandledExceptionFilter)); - if (ExceptionFilter == &SEHHandler) - return REAL(SetUnhandledExceptionFilter)(ExceptionFilter); - // We record the user provided exception handler to be called for all the - // exceptions unhandled by asan. - Swap(ExceptionFilter, user_seh_handler); - return ExceptionFilter; -} - -INTERCEPTOR_WINAPI(void, RtlRaiseException, EXCEPTION_RECORD *ExceptionRecord) { - CHECK(REAL(RtlRaiseException)); - // This is a noreturn function, unless it's one of the exceptions raised to - // communicate with the debugger, such as the one from OutputDebugString. - if (ExceptionRecord->ExceptionCode != DBG_PRINTEXCEPTION_C) - __asan_handle_no_return(); - REAL(RtlRaiseException)(ExceptionRecord); -} - -INTERCEPTOR_WINAPI(void, RaiseException, void *a, void *b, void *c, void *d) { - CHECK(REAL(RaiseException)); - __asan_handle_no_return(); - REAL(RaiseException)(a, b, c, d); -} - -#ifdef _WIN64 - -INTERCEPTOR_WINAPI(int, __C_specific_handler, void *a, void *b, void *c, void *d) { // NOLINT - CHECK(REAL(__C_specific_handler)); - __asan_handle_no_return(); - return REAL(__C_specific_handler)(a, b, c, d); -} - -#else - -INTERCEPTOR(int, _except_handler3, void *a, void *b, void *c, void *d) { - CHECK(REAL(_except_handler3)); - __asan_handle_no_return(); - return REAL(_except_handler3)(a, b, c, d); -} - -#if ASAN_DYNAMIC -// This handler is named differently in -MT and -MD CRTs. -#define _except_handler4 _except_handler4_common -#endif -INTERCEPTOR(int, _except_handler4, void *a, void *b, void *c, void *d) { - CHECK(REAL(_except_handler4)); - __asan_handle_no_return(); - return REAL(_except_handler4)(a, b, c, d); -} -#endif - -static thread_return_t THREAD_CALLING_CONV asan_thread_start(void *arg) { - AsanThread *t = (AsanThread*)arg; - SetCurrentThread(t); - return t->ThreadStart(GetTid(), /* signal_thread_is_registered */ nullptr); -} - -INTERCEPTOR_WINAPI(DWORD, CreateThread, - void* security, uptr stack_size, - DWORD (__stdcall *start_routine)(void*), void* arg, - DWORD thr_flags, void* tid) { - // Strict init-order checking is thread-hostile. - if (flags()->strict_init_order) - StopInitOrderChecking(); - GET_STACK_TRACE_THREAD; - // FIXME: The CreateThread interceptor is not the same as a pthread_create - // one. This is a bandaid fix for PR22025. - bool detached = false; // FIXME: how can we determine it on Windows? - u32 current_tid = GetCurrentTidOrInvalid(); - AsanThread *t = - AsanThread::Create(start_routine, arg, current_tid, &stack, detached); - return REAL(CreateThread)(security, stack_size, - asan_thread_start, t, thr_flags, tid); -} - -// }}} - -namespace __asan { - -void InitializePlatformInterceptors() { - ASAN_INTERCEPT_FUNC(CreateThread); - ASAN_INTERCEPT_FUNC(SetUnhandledExceptionFilter); - -#ifdef _WIN64 - ASAN_INTERCEPT_FUNC(__C_specific_handler); -#else - ASAN_INTERCEPT_FUNC(_except_handler3); - ASAN_INTERCEPT_FUNC(_except_handler4); -#endif - - // Try to intercept kernel32!RaiseException, and if that fails, intercept - // ntdll!RtlRaiseException instead. - if (!::__interception::OverrideFunction("RaiseException", - (uptr)WRAP(RaiseException), - (uptr *)&REAL(RaiseException))) { - CHECK(::__interception::OverrideFunction("RtlRaiseException", - (uptr)WRAP(RtlRaiseException), - (uptr *)&REAL(RtlRaiseException))); - } -} - -void AsanApplyToGlobals(globals_op_fptr op, const void *needle) { - UNIMPLEMENTED(); -} - -// ---------------------- TSD ---------------- {{{ -static bool tsd_key_inited = false; - -static __declspec(thread) void *fake_tsd = 0; - -void AsanTSDInit(void (*destructor)(void *tsd)) { - // FIXME: we're ignoring the destructor for now. - tsd_key_inited = true; -} - -void *AsanTSDGet() { - CHECK(tsd_key_inited); - return fake_tsd; -} - -void AsanTSDSet(void *tsd) { - CHECK(tsd_key_inited); - fake_tsd = tsd; -} - -void PlatformTSDDtor(void *tsd) { - AsanThread::TSDDtor(tsd); -} -// }}} - -// ---------------------- Various stuff ---------------- {{{ -void *AsanDoesNotSupportStaticLinkage() { -#if defined(_DEBUG) -#error Please build the runtime with a non-debug CRT: /MD or /MT -#endif - return 0; -} - -uptr FindDynamicShadowStart() { - uptr granularity = GetMmapGranularity(); - uptr alignment = 8 * granularity; - uptr left_padding = granularity; - uptr space_size = kHighShadowEnd + left_padding; - uptr shadow_start = FindAvailableMemoryRange(space_size, alignment, - granularity, nullptr, nullptr); - CHECK_NE((uptr)0, shadow_start); - CHECK(IsAligned(shadow_start, alignment)); - return shadow_start; -} - -void AsanCheckDynamicRTPrereqs() {} - -void AsanCheckIncompatibleRT() {} - -void ReadContextStack(void *context, uptr *stack, uptr *ssize) { - UNIMPLEMENTED(); -} - -void AsanOnDeadlySignal(int, void *siginfo, void *context) { - UNIMPLEMENTED(); -} - -#if SANITIZER_WINDOWS64 -// Exception handler for dealing with shadow memory. -static LONG CALLBACK -ShadowExceptionHandler(PEXCEPTION_POINTERS exception_pointers) { - uptr page_size = GetPageSizeCached(); - // Only handle access violations. - if (exception_pointers->ExceptionRecord->ExceptionCode != - EXCEPTION_ACCESS_VIOLATION) { - return EXCEPTION_CONTINUE_SEARCH; - } - - // Only handle access violations that land within the shadow memory. - uptr addr = - (uptr)(exception_pointers->ExceptionRecord->ExceptionInformation[1]); - - // Check valid shadow range. - if (!AddrIsInShadow(addr)) return EXCEPTION_CONTINUE_SEARCH; - - // This is an access violation while trying to read from the shadow. Commit - // the relevant page and let execution continue. - - // Determine the address of the page that is being accessed. - uptr page = RoundDownTo(addr, page_size); - - // Commit the page. - uptr result = - (uptr)::VirtualAlloc((LPVOID)page, page_size, MEM_COMMIT, PAGE_READWRITE); - if (result != page) return EXCEPTION_CONTINUE_SEARCH; - - // The page mapping succeeded, so continue execution as usual. - return EXCEPTION_CONTINUE_EXECUTION; -} - -#endif - -void InitializePlatformExceptionHandlers() { -#if SANITIZER_WINDOWS64 - // On Win64, we map memory on demand with access violation handler. - // Install our exception handler. - CHECK(AddVectoredExceptionHandler(TRUE, &ShadowExceptionHandler)); -#endif -} - -bool IsSystemHeapAddress(uptr addr) { - return ::HeapValidate(GetProcessHeap(), 0, (void*)addr) != FALSE; -} - -// We want to install our own exception handler (EH) to print helpful reports -// on access violations and whatnot. Unfortunately, the CRT initializers assume -// they are run before any user code and drop any previously-installed EHs on -// the floor, so we can't install our handler inside __asan_init. -// (See crt0dat.c in the CRT sources for the details) -// -// Things get even more complicated with the dynamic runtime, as it finishes its -// initialization before the .exe module CRT begins to initialize. -// -// For the static runtime (-MT), it's enough to put a callback to -// __asan_set_seh_filter in the last section for C initializers. -// -// For the dynamic runtime (-MD), we want link the same -// asan_dynamic_runtime_thunk.lib to all the modules, thus __asan_set_seh_filter -// will be called for each instrumented module. This ensures that at least one -// __asan_set_seh_filter call happens after the .exe module CRT is initialized. -extern "C" SANITIZER_INTERFACE_ATTRIBUTE -int __asan_set_seh_filter() { - // We should only store the previous handler if it's not our own handler in - // order to avoid loops in the EH chain. - auto prev_seh_handler = SetUnhandledExceptionFilter(SEHHandler); - if (prev_seh_handler != &SEHHandler) - default_seh_handler = prev_seh_handler; - return 0; -} - -#if !ASAN_DYNAMIC -// The CRT runs initializers in this order: -// - C initializers, from XIA to XIZ -// - C++ initializers, from XCA to XCZ -// Prior to 2015, the CRT set the unhandled exception filter at priority XIY, -// near the end of C initialization. Starting in 2015, it was moved to the -// beginning of C++ initialization. We set our priority to XCAB to run -// immediately after the CRT runs. This way, our exception filter is called -// first and we can delegate to their filter if appropriate. -#pragma section(".CRT$XCAB", long, read) // NOLINT -__declspec(allocate(".CRT$XCAB")) int (*__intercept_seh)() = - __asan_set_seh_filter; - -// Piggyback on the TLS initialization callback directory to initialize asan as -// early as possible. Initializers in .CRT$XL* are called directly by ntdll, -// which run before the CRT. Users also add code to .CRT$XLC, so it's important -// to run our initializers first. -static void NTAPI asan_thread_init(void *module, DWORD reason, void *reserved) { - if (reason == DLL_PROCESS_ATTACH) __asan_init(); -} - -#pragma section(".CRT$XLAB", long, read) // NOLINT -__declspec(allocate(".CRT$XLAB")) void (NTAPI *__asan_tls_init)(void *, - unsigned long, void *) = asan_thread_init; -#endif - -WIN_FORCE_LINK(__asan_dso_reg_hook) - -// }}} -} // namespace __asan - -#endif // SANITIZER_WINDOWS |