mirror of
https://github.com/autc04/Retro68.git
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261 lines
9.0 KiB
C++
261 lines
9.0 KiB
C++
//===-- asan_win.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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// Windows-specific details.
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//===----------------------------------------------------------------------===//
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#include "sanitizer_common/sanitizer_platform.h"
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#if SANITIZER_WINDOWS
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#define WIN32_LEAN_AND_MEAN
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#include <windows.h>
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#include <stdlib.h>
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#include "asan_interceptors.h"
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#include "asan_internal.h"
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#include "asan_report.h"
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#include "asan_stack.h"
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#include "asan_thread.h"
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#include "sanitizer_common/sanitizer_libc.h"
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#include "sanitizer_common/sanitizer_mutex.h"
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using namespace __asan; // NOLINT
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extern "C" {
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SANITIZER_INTERFACE_ATTRIBUTE
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int __asan_should_detect_stack_use_after_return() {
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__asan_init();
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return __asan_option_detect_stack_use_after_return;
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}
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// -------------------- A workaround for the abscence of weak symbols ----- {{{
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// We don't have a direct equivalent of weak symbols when using MSVC, but we can
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// use the /alternatename directive to tell the linker to default a specific
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// symbol to a specific value, which works nicely for allocator hooks and
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// __asan_default_options().
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void __sanitizer_default_malloc_hook(void *ptr, uptr size) { }
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void __sanitizer_default_free_hook(void *ptr) { }
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const char* __asan_default_default_options() { return ""; }
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const char* __asan_default_default_suppressions() { return ""; }
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void __asan_default_on_error() {}
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#pragma comment(linker, "/alternatename:___sanitizer_malloc_hook=___sanitizer_default_malloc_hook") // NOLINT
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#pragma comment(linker, "/alternatename:___sanitizer_free_hook=___sanitizer_default_free_hook") // NOLINT
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#pragma comment(linker, "/alternatename:___asan_default_options=___asan_default_default_options") // NOLINT
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#pragma comment(linker, "/alternatename:___asan_default_suppressions=___asan_default_default_suppressions") // NOLINT
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#pragma comment(linker, "/alternatename:___asan_on_error=___asan_default_on_error") // NOLINT
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// }}}
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} // extern "C"
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// ---------------------- Windows-specific inteceptors ---------------- {{{
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INTERCEPTOR_WINAPI(void, RaiseException, void *a, void *b, void *c, void *d) {
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CHECK(REAL(RaiseException));
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__asan_handle_no_return();
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REAL(RaiseException)(a, b, c, d);
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}
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INTERCEPTOR(int, _except_handler3, void *a, void *b, void *c, void *d) {
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CHECK(REAL(_except_handler3));
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__asan_handle_no_return();
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return REAL(_except_handler3)(a, b, c, d);
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}
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#if ASAN_DYNAMIC
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// This handler is named differently in -MT and -MD CRTs.
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#define _except_handler4 _except_handler4_common
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#endif
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INTERCEPTOR(int, _except_handler4, void *a, void *b, void *c, void *d) {
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CHECK(REAL(_except_handler4));
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__asan_handle_no_return();
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return REAL(_except_handler4)(a, b, c, d);
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}
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static thread_return_t THREAD_CALLING_CONV asan_thread_start(void *arg) {
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AsanThread *t = (AsanThread*)arg;
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SetCurrentThread(t);
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return t->ThreadStart(GetTid(), /* signal_thread_is_registered */ nullptr);
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}
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INTERCEPTOR_WINAPI(DWORD, CreateThread,
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void* security, uptr stack_size,
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DWORD (__stdcall *start_routine)(void*), void* arg,
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DWORD thr_flags, void* tid) {
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// Strict init-order checking is thread-hostile.
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if (flags()->strict_init_order)
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StopInitOrderChecking();
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GET_STACK_TRACE_THREAD;
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// FIXME: The CreateThread interceptor is not the same as a pthread_create
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// one. This is a bandaid fix for PR22025.
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bool detached = false; // FIXME: how can we determine it on Windows?
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u32 current_tid = GetCurrentTidOrInvalid();
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AsanThread *t =
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AsanThread::Create(start_routine, arg, current_tid, &stack, detached);
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return REAL(CreateThread)(security, stack_size,
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asan_thread_start, t, thr_flags, tid);
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}
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namespace {
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BlockingMutex mu_for_thread_tracking(LINKER_INITIALIZED);
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void EnsureWorkerThreadRegistered() {
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// FIXME: GetCurrentThread relies on TSD, which might not play well with
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// system thread pools. We might want to use something like reference
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// counting to zero out GetCurrentThread() underlying storage when the last
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// work item finishes? Or can we disable reclaiming of threads in the pool?
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BlockingMutexLock l(&mu_for_thread_tracking);
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if (__asan::GetCurrentThread())
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return;
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AsanThread *t = AsanThread::Create(
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/* start_routine */ nullptr, /* arg */ nullptr,
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/* parent_tid */ -1, /* stack */ nullptr, /* detached */ true);
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t->Init();
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asanThreadRegistry().StartThread(t->tid(), 0, 0);
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SetCurrentThread(t);
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}
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} // namespace
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INTERCEPTOR_WINAPI(DWORD, NtWaitForWorkViaWorkerFactory, DWORD a, DWORD b) {
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// NtWaitForWorkViaWorkerFactory is called from system worker pool threads to
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// query work scheduled by BindIoCompletionCallback, QueueUserWorkItem, etc.
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// System worker pool threads are created at arbitraty point in time and
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// without using CreateThread, so we wrap NtWaitForWorkViaWorkerFactory
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// instead and don't register a specific parent_tid/stack.
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EnsureWorkerThreadRegistered();
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return REAL(NtWaitForWorkViaWorkerFactory)(a, b);
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}
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// }}}
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namespace __asan {
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void InitializePlatformInterceptors() {
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ASAN_INTERCEPT_FUNC(CreateThread);
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ASAN_INTERCEPT_FUNC(RaiseException);
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ASAN_INTERCEPT_FUNC(_except_handler3);
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ASAN_INTERCEPT_FUNC(_except_handler4);
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// NtWaitForWorkViaWorkerFactory is always linked dynamically.
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CHECK(::__interception::OverrideFunction(
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"NtWaitForWorkViaWorkerFactory",
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(uptr)WRAP(NtWaitForWorkViaWorkerFactory),
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(uptr *)&REAL(NtWaitForWorkViaWorkerFactory)));
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}
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// ---------------------- TSD ---------------- {{{
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static bool tsd_key_inited = false;
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static __declspec(thread) void *fake_tsd = 0;
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void AsanTSDInit(void (*destructor)(void *tsd)) {
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// FIXME: we're ignoring the destructor for now.
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tsd_key_inited = true;
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}
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void *AsanTSDGet() {
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CHECK(tsd_key_inited);
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return fake_tsd;
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}
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void AsanTSDSet(void *tsd) {
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CHECK(tsd_key_inited);
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fake_tsd = tsd;
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}
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void PlatformTSDDtor(void *tsd) {
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AsanThread::TSDDtor(tsd);
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}
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// }}}
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// ---------------------- Various stuff ---------------- {{{
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void DisableReexec() {
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// No need to re-exec on Windows.
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}
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void MaybeReexec() {
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// No need to re-exec on Windows.
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}
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void *AsanDoesNotSupportStaticLinkage() {
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#if defined(_DEBUG)
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#error Please build the runtime with a non-debug CRT: /MD or /MT
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#endif
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return 0;
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}
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void AsanCheckDynamicRTPrereqs() {}
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void AsanCheckIncompatibleRT() {}
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void ReadContextStack(void *context, uptr *stack, uptr *ssize) {
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UNIMPLEMENTED();
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}
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void AsanOnDeadlySignal(int, void *siginfo, void *context) {
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UNIMPLEMENTED();
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}
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static LPTOP_LEVEL_EXCEPTION_FILTER default_seh_handler;
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static long WINAPI SEHHandler(EXCEPTION_POINTERS *info) {
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EXCEPTION_RECORD *exception_record = info->ExceptionRecord;
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CONTEXT *context = info->ContextRecord;
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if (exception_record->ExceptionCode == EXCEPTION_ACCESS_VIOLATION ||
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exception_record->ExceptionCode == EXCEPTION_IN_PAGE_ERROR) {
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const char *description =
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(exception_record->ExceptionCode == EXCEPTION_ACCESS_VIOLATION)
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? "access-violation"
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: "in-page-error";
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SignalContext sig = SignalContext::Create(exception_record, context);
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ReportDeadlySignal(description, sig);
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}
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// FIXME: Handle EXCEPTION_STACK_OVERFLOW here.
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return default_seh_handler(info);
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}
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// We want to install our own exception handler (EH) to print helpful reports
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// on access violations and whatnot. Unfortunately, the CRT initializers assume
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// they are run before any user code and drop any previously-installed EHs on
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// the floor, so we can't install our handler inside __asan_init.
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// (See crt0dat.c in the CRT sources for the details)
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//
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// Things get even more complicated with the dynamic runtime, as it finishes its
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// initialization before the .exe module CRT begins to initialize.
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//
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// For the static runtime (-MT), it's enough to put a callback to
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// __asan_set_seh_filter in the last section for C initializers.
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//
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// For the dynamic runtime (-MD), we want link the same
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// asan_dynamic_runtime_thunk.lib to all the modules, thus __asan_set_seh_filter
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// will be called for each instrumented module. This ensures that at least one
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// __asan_set_seh_filter call happens after the .exe module CRT is initialized.
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extern "C" SANITIZER_INTERFACE_ATTRIBUTE
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int __asan_set_seh_filter() {
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// We should only store the previous handler if it's not our own handler in
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// order to avoid loops in the EH chain.
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auto prev_seh_handler = SetUnhandledExceptionFilter(SEHHandler);
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if (prev_seh_handler != &SEHHandler)
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default_seh_handler = prev_seh_handler;
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return 0;
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}
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#if !ASAN_DYNAMIC
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// Put a pointer to __asan_set_seh_filter at the end of the global list
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// of C initializers, after the default EH is set by the CRT.
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#pragma section(".CRT$XIZ", long, read) // NOLINT
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__declspec(allocate(".CRT$XIZ"))
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int (*__intercept_seh)() = __asan_set_seh_filter;
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#endif
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// }}}
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} // namespace __asan
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#endif // _WIN32
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