webkitgtk-2.16.5HEADwebkitgtk-2.16.5master

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diff --git a/Source/JavaScriptCore/runtime/ThrowScope.h b/Source/JavaScriptCore/runtime/ThrowScope.h
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+++ b/Source/JavaScriptCore/runtime/ThrowScope.h
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+/*
+ * Copyright (C) 2016 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.
+ */
+
+#pragma once
+
+#include "ExceptionScope.h"
+
+namespace JSC {
+
+class ExecState;
+class JSObject;
+
+#if ENABLE(EXCEPTION_SCOPE_VERIFICATION)
+
+// If a function can throw a JS exception, it should declare a ThrowScope at the
+// top of the function (as early as possible) using the DECLARE_THROW_SCOPE macro.
+// Declaring a ThrowScope in a function means that the function may throw an
+// exception that its caller will have to handle.
+
+class ThrowScope : public ExceptionScope {
+public:
+    JS_EXPORT_PRIVATE ThrowScope(VM&, ExceptionEventLocation);
+    JS_EXPORT_PRIVATE ~ThrowScope();
+
+    ThrowScope(const ThrowScope&) = delete;
+    ThrowScope(ThrowScope&&) = default;
+
+    JS_EXPORT_PRIVATE void throwException(ExecState*, Exception*);
+    JS_EXPORT_PRIVATE JSValue throwException(ExecState*, JSValue);
+    JS_EXPORT_PRIVATE JSObject* throwException(ExecState*, JSObject*);
+
+    void release() { m_isReleased = true; }
+
+    JS_EXPORT_PRIVATE void printIfNeedCheck(const char* functionName, const char* file, unsigned line);
+
+private:
+    void simulateThrow();
+
+    bool m_isReleased { false };
+};
+
+#define DECLARE_THROW_SCOPE(vm__) \
+    JSC::ThrowScope((vm__), JSC::ExceptionEventLocation(__FUNCTION__, __FILE__, __LINE__))
+
+#define throwScopePrintIfNeedCheck(scope__) \
+    scope__.printIfNeedCheck(__FUNCTION__, __FILE__, __LINE__)
+
+#else // not ENABLE(EXCEPTION_SCOPE_VERIFICATION)
+
+class ThrowScope : public ExceptionScope {
+public:
+    ALWAYS_INLINE ThrowScope(VM& vm)
+        : ExceptionScope(vm)
+    { }
+    ThrowScope(const ThrowScope&) = delete;
+    ThrowScope(ThrowScope&&) = default;
+
+    ALWAYS_INLINE void throwException(ExecState* exec, Exception* exception) { m_vm.throwException(exec, exception); }
+    ALWAYS_INLINE JSValue throwException(ExecState* exec, JSValue value) { return m_vm.throwException(exec, value); }
+    ALWAYS_INLINE JSObject* throwException(ExecState* exec, JSObject* obj) { return m_vm.throwException(exec, obj); }
+
+    ALWAYS_INLINE void release() { }
+};
+
+#define DECLARE_THROW_SCOPE(vm__) \
+    JSC::ThrowScope((vm__))
+
+#endif // ENABLE(EXCEPTION_SCOPE_VERIFICATION)
+
+ALWAYS_INLINE void throwException(ExecState* exec, ThrowScope& scope, Exception* exception)
+{
+    scope.throwException(exec, exception);
+}
+
+ALWAYS_INLINE JSValue throwException(ExecState* exec, ThrowScope& scope, JSValue value)
+{
+    return scope.throwException(exec, value);
+}
+
+ALWAYS_INLINE JSObject* throwException(ExecState* exec, ThrowScope& scope, JSObject* obj)
+{
+    return scope.throwException(exec, obj);
+}
+
+} // namespace JSC