JavaScriptCore-7600.1.4.9.tar.gz

[apple/javascriptcore.git] / runtime / ErrorHandlingScope.cpp

diff --git a/runtime/ErrorHandlingScope.cpp b/runtime/ErrorHandlingScope.cpp
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+/*
+ * Copyright (C) 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 "ErrorHandlingScope.h"
+
+#include "Interpreter.h"
+#include "Options.h"
+#include "VM.h"
+
+namespace JSC {
+
+ErrorHandlingScope::ErrorHandlingScope(VM& vm)
+    : m_vm(vm)
+{
+    RELEASE_ASSERT(m_vm.stackPointerAtVMEntry());
+    size_t newReservedZoneSize = Options::errorModeReservedZoneSize();
+    m_savedReservedZoneSize = m_vm.updateReservedZoneSize(newReservedZoneSize);
+#if !ENABLE(JIT)
+    m_vm.interpreter->stack().setReservedZoneSize(newReservedZoneSize);
+#endif
+}
+
+ErrorHandlingScope::~ErrorHandlingScope()
+{
+    RELEASE_ASSERT(m_vm.stackPointerAtVMEntry());
+    m_vm.updateReservedZoneSize(m_savedReservedZoneSize);
+#if !ENABLE(JIT)
+    m_vm.interpreter->stack().setReservedZoneSize(m_savedReservedZoneSize);
+#endif
+}
+
+} // namespace JSC