/* * 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 "WasmContext.h" #if ENABLE(WEBASSEMBLY) #include "VM.h" #include <mutex> #include <wtf/FastTLS.h> namespace JSC { namespace Wasm { Context* loadContext(VM& vm) { #if ENABLE(FAST_TLS_JIT) if (useFastTLSForContext()) return bitwise_cast<Context*>(_pthread_getspecific_direct(WTF_WASM_CONTEXT_KEY)); #endif return vm.wasmContext; } void storeContext(VM& vm, Context* context) { #if ENABLE(FAST_TLS_JIT) if (useFastTLSForContext()) _pthread_setspecific_direct(WTF_WASM_CONTEXT_KEY, bitwise_cast<void*>(context)); #endif vm.wasmContext = context; if (context) context->setCachedStackLimit(vm.softStackLimit()); } } } // namespace JSC::Wasm #endif // ENABLE(WEBASSEMBLY)