blob: 33140a3ea12c2f0466923b5b7da1e6c3ee12e803 [file] [log] [blame]
/*
* Copyright (C) 2017 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "WasmMachineThreads.h"
#if ENABLE(WEBASSEMBLY)
#include "MachineStackMarker.h"
#include <wtf/NeverDestroyed.h>
#include <wtf/ThreadMessage.h>
namespace JSC { namespace Wasm {
inline MachineThreads& wasmThreads()
{
static LazyNeverDestroyed<MachineThreads> threads;
static std::once_flag once;
std::call_once(once, [] {
threads.construct();
});
return threads;
}
void startTrackingCurrentThread()
{
wasmThreads().addCurrentThread();
}
void resetInstructionCacheOnAllThreads()
{
Locker locker { wasmThreads().getLock() };
ThreadSuspendLocker threadSuspendLocker;
for (auto& thread : wasmThreads().threads(locker)) {
sendMessage(threadSuspendLocker, thread.get(), [] (const PlatformRegisters&) {
// It's likely that the signal handler will already reset the instruction cache but we might as well be sure.
WTF::crossModifyingCodeFence();
});
}
}
} } // namespace JSC::Wasm
#endif // ENABLE(WEBASSEMBLY)