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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 CallFrame;
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 Exception* throwException(JSGlobalObject*, Exception*);
JS_EXPORT_PRIVATE Exception* throwException(JSGlobalObject*, JSValue);
void release() { m_isReleased = true; }
void clearException() { m_vm.clearException(); }
private:
void simulateThrow();
bool m_isReleased { false };
};
#define DECLARE_THROW_SCOPE(vm__) \
JSC::ThrowScope((vm__), JSC::ExceptionEventLocation(EXCEPTION_SCOPE_POSITION_FOR_ASAN(vm__), __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 Exception* throwException(JSGlobalObject* globalObject, Exception* exception) { return m_vm.throwException(globalObject, exception); }
ALWAYS_INLINE Exception* throwException(JSGlobalObject* globalObject, JSValue value) { return m_vm.throwException(globalObject, value); }
ALWAYS_INLINE void release() { }
ALWAYS_INLINE void clearException() { m_vm.clearException(); }
};
#define DECLARE_THROW_SCOPE(vm__) \
JSC::ThrowScope((vm__))
#endif // ENABLE(EXCEPTION_SCOPE_VERIFICATION)
ALWAYS_INLINE Exception* throwException(JSGlobalObject* globalObject, ThrowScope& scope, Exception* exception)
{
return scope.throwException(globalObject, exception);
}
ALWAYS_INLINE Exception* throwException(JSGlobalObject* globalObject, ThrowScope& scope, JSValue value)
{
return scope.throwException(globalObject, value);
}
ALWAYS_INLINE EncodedJSValue throwVMException(JSGlobalObject* globalObject, ThrowScope& scope, Exception* exception)
{
throwException(globalObject, scope, exception);
return encodedJSValue();
}
ALWAYS_INLINE EncodedJSValue throwVMException(JSGlobalObject* globalObject, ThrowScope& scope, JSValue value)
{
throwException(globalObject, scope, value);
return encodedJSValue();
}
} // namespace JSC
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