/* * Copyright (C) 2013, 2014 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 "VMEntryScope.h" #include "Debugger.h" #include "Options.h" #include "VM.h" #include <wtf/StackBounds.h> namespace JSC { VMEntryScope::VMEntryScope(VM& vm, JSGlobalObject* globalObject) : m_vm(vm) , m_globalObject(globalObject) , m_recompilationNeeded(false) { ASSERT(wtfThreadData().stack().isGrowingDownward()); if (!vm.entryScope) { #if ENABLE(ASSEMBLER) if (ExecutableAllocator::underMemoryPressure()) vm.heap.deleteAllCompiledCode(); #endif vm.entryScope = this; // Reset the date cache between JS invocations to force the VM to // observe time xone changes. vm.resetDateCache(); } // Clear the captured exception stack between entries vm.clearExceptionStack(); } VMEntryScope::~VMEntryScope() { if (m_vm.entryScope != this) return; m_vm.entryScope = nullptr; if (m_recompilationNeeded) { if (Debugger* debugger = m_globalObject->debugger()) debugger->recompileAllJSFunctions(&m_vm); } } } // namespace JSC