// Copyright 2018 the V8 project authors. All rights reserved. // Use of this source code is governed by a BSD-style license that can be // found in the LICENSE file. // PLEASE READ BEFORE CHANGING THIS FILE! // // This file implements the support code for the out of bounds trap handler. // Nothing in here actually runs in the trap handler, but the code here // manipulates data structures used by the trap handler so we still need to be // careful. In order to minimize this risk, here are some rules to follow. // // 1. Avoid introducing new external dependencies. The files in src/trap-handler // should be as self-contained as possible to make it easy to audit the code. // // 2. Any changes must be reviewed by someone from the crash reporting // or security team. Se OWNERS for suggested reviewers. // // For more information, see https://goo.gl/yMeyUY. // // For the code that runs in the trap handler itself, see handler-inside.cc. #include <windows.h> #include "src/trap-handler/handler-inside-win.h" #include "src/trap-handler/trap-handler.h" namespace v8 { namespace internal { namespace trap_handler { #if V8_TRAP_HANDLER_SUPPORTED namespace { // A handle to our registered exception handler, so that we can remove it // again later. void* g_registered_handler = nullptr; } // namespace bool RegisterDefaultTrapHandler() { constexpr ULONG first = TRUE; CHECK_NULL(g_registered_handler); g_registered_handler = AddVectoredExceptionHandler(first, HandleWasmTrap); return nullptr != g_registered_handler; } void RemoveTrapHandler() { if (!g_registered_handler) return; RemoveVectoredExceptionHandler(g_registered_handler); g_registered_handler = nullptr; } #endif // V8_TRAP_HANDLER_SUPPORTED } // namespace trap_handler } // namespace internal } // namespace v8