JavaScriptCore-7601.1.46.3.tar.gz

[apple/javascriptcore.git] / interpreter / VMEntryRecord.h

diff --git a/interpreter/VMEntryRecord.h b/interpreter/VMEntryRecord.h
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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.
+ */
+
+#ifndef VMEntryRecord_h
+#define VMEntryRecord_h
+
+namespace JSC {
+
+typedef void VMEntryFrame;
+
+class ExecState;
+class VM;
+
+struct VMEntryRecord {
+    /*
+     * This record stored in a vmEntryTo{JavaScript,Host} allocated frame. It is allocated on the stack
+     * after callee save registers where local variables would go.
+     */
+    VM* m_vm;
+    ExecState* m_prevTopCallFrame;
+    VMEntryFrame* m_prevTopVMEntryFrame;
+
+    ExecState* prevTopCallFrame() { return m_prevTopCallFrame; }
+
+    VMEntryFrame* prevTopVMEntryFrame() { return m_prevTopVMEntryFrame; }
+};
+
+extern "C" VMEntryRecord* vmEntryRecord(VMEntryFrame*);
+
+} // namespace JSC
+
+#endif // VMEntryRecord_h