The Tor Browser / file comparison
comparison: js/src/jit/AsmJSSignalHandlers.h
js/src/jit/AsmJSSignalHandlers.h
- changeset 0
- 6474c204b198
equal
deleted
inserted
replaced
| -1:000000000000 | 0:ed678f14b7f6 |
|---|---|
| 1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- | |
| 2 * vim: set ts=8 sts=4 et sw=4 tw=99: | |
| 3 * This Source Code Form is subject to the terms of the Mozilla Public | |
| 4 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 6 | |
| 7 #ifndef jit_AsmJSSignalHandlers_h | |
| 8 #define jit_AsmJSSignalHandlers_h | |
| 9 | |
| 10 struct JSRuntime; | |
| 11 | |
| 12 #ifdef XP_MACOSX | |
| 13 # include <mach/mach.h> | |
| 14 # include "jslock.h" | |
| 15 #endif | |
| 16 | |
| 17 namespace js { | |
| 18 | |
| 19 // Returns whether signal handlers for asm.js and for JitRuntime access | |
| 20 // violations have been installed. | |
| 21 bool | |
| 22 EnsureAsmJSSignalHandlersInstalled(JSRuntime *rt); | |
| 23 | |
| 24 // Force any currently-executing asm.js code to call | |
| 25 // js::HandleExecutionInterrupt. | |
| 26 extern void | |
| 27 RequestInterruptForAsmJSCode(JSRuntime *rt); | |
| 28 | |
| 29 // On OSX we are forced to use the lower-level Mach exception mechanism instead | |
| 30 // of Unix signals. Mach exceptions are not handled on the victim's stack but | |
| 31 // rather require an extra thread. For simplicity, we create one such thread | |
| 32 // per JSRuntime (upon the first use of asm.js in the JSRuntime). This thread | |
| 33 // and related resources are owned by AsmJSMachExceptionHandler which is owned | |
| 34 // by JSRuntime. | |
| 35 #ifdef XP_MACOSX | |
| 36 class AsmJSMachExceptionHandler | |
| 37 { | |
| 38 bool installed_; | |
| 39 PRThread *thread_; | |
| 40 mach_port_t port_; | |
| 41 | |
| 42 void uninstall(); | |
| 43 | |
| 44 public: | |
| 45 AsmJSMachExceptionHandler(); | |
| 46 ~AsmJSMachExceptionHandler() { uninstall(); } | |
| 47 mach_port_t port() const { return port_; } | |
| 48 bool installed() const { return installed_; } | |
| 49 bool install(JSRuntime *rt); | |
| 50 }; | |
| 51 #endif | |
| 52 | |
| 53 } // namespace js | |
| 54 | |
| 55 #endif // jit_AsmJSSignalHandlers_h |
