mirror of
https://repo.dactyloidae.xyz/Dactyloidae/UXP.git
synced 2026-11-01 12:07:34 +09:00
81 lines
2.4 KiB
C
81 lines
2.4 KiB
C
|
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
|
||
|
|
* vim: set ts=8 sts=4 et sw=4 tw=99:
|
||
|
|
*
|
||
|
|
* Copyright 2014 Mozilla Foundation
|
||
|
|
*
|
||
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
||
|
|
* you may not use this file except in compliance with the License.
|
||
|
|
* You may obtain a copy of the License at
|
||
|
|
*
|
||
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
||
|
|
*
|
||
|
|
* Unless required by applicable law or agreed to in writing, software
|
||
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
||
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||
|
|
* See the License for the specific language governing permissions and
|
||
|
|
* limitations under the License.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef wasm_signal_handlers_h
|
||
|
|
#define wasm_signal_handlers_h
|
||
|
|
|
||
|
|
#include "mozilla/Attributes.h"
|
||
|
|
|
||
|
|
#if defined(XP_DARWIN)
|
||
|
|
# include <mach/mach.h>
|
||
|
|
#endif
|
||
|
|
#include "threading/Thread.h"
|
||
|
|
|
||
|
|
struct JSRuntime;
|
||
|
|
|
||
|
|
namespace js {
|
||
|
|
|
||
|
|
// Force any currently-executing asm.js/ion code to call HandleExecutionInterrupt.
|
||
|
|
extern void
|
||
|
|
InterruptRunningJitCode(JSRuntime* rt);
|
||
|
|
|
||
|
|
namespace wasm {
|
||
|
|
|
||
|
|
// Ensure the given JSRuntime is set up to use signals. Failure to enable signal
|
||
|
|
// handlers indicates some catastrophic failure and creation of the runtime must
|
||
|
|
// fail.
|
||
|
|
MOZ_MUST_USE bool
|
||
|
|
EnsureSignalHandlers(JSRuntime* rt);
|
||
|
|
|
||
|
|
// Return whether signals can be used in this process for interrupts or
|
||
|
|
// asm.js/wasm out-of-bounds.
|
||
|
|
bool
|
||
|
|
HaveSignalHandlers();
|
||
|
|
|
||
|
|
#if defined(XP_DARWIN)
|
||
|
|
// On OSX we are forced to use the lower-level Mach exception mechanism instead
|
||
|
|
// of Unix signals. Mach exceptions are not handled on the victim's stack but
|
||
|
|
// rather require an extra thread. For simplicity, we create one such thread
|
||
|
|
// per JSRuntime (upon the first use of asm.js in the JSRuntime). This thread
|
||
|
|
// and related resources are owned by AsmJSMachExceptionHandler which is owned
|
||
|
|
// by JSRuntime.
|
||
|
|
class MachExceptionHandler
|
||
|
|
{
|
||
|
|
bool installed_;
|
||
|
|
js::Thread thread_;
|
||
|
|
mach_port_t port_;
|
||
|
|
|
||
|
|
void uninstall();
|
||
|
|
|
||
|
|
public:
|
||
|
|
MachExceptionHandler();
|
||
|
|
~MachExceptionHandler() { uninstall(); }
|
||
|
|
mach_port_t port() const { return port_; }
|
||
|
|
bool installed() const { return installed_; }
|
||
|
|
bool install(JSRuntime* rt);
|
||
|
|
};
|
||
|
|
#endif
|
||
|
|
|
||
|
|
// Test whether the given PC is within the innermost wasm activation. Return
|
||
|
|
// false if it is not, or it cannot be determined.
|
||
|
|
bool IsPCInWasmCode(void *pc);
|
||
|
|
|
||
|
|
} // namespace wasm
|
||
|
|
} // namespace js
|
||
|
|
|
||
|
|
#endif // wasm_signal_handlers_h
|