mirror of
https://github.com/darlinghq/darling-JavaScriptCore.git
synced 2025-04-15 21:39:58 +00:00
117 lines
4.1 KiB
C++
117 lines
4.1 KiB
C++
/*
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* Copyright (C) 2016-2018 Apple Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#include "VM.h"
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#include <wtf/StackPointer.h>
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namespace JSC {
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class Exception;
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#if ENABLE(EXCEPTION_SCOPE_VERIFICATION)
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#define EXCEPTION_ASSERT(assertion) RELEASE_ASSERT(assertion)
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#define EXCEPTION_ASSERT_UNUSED(variable, assertion) RELEASE_ASSERT(assertion)
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#define EXCEPTION_ASSERT_WITH_MESSAGE(assertion, message) RELEASE_ASSERT_WITH_MESSAGE(assertion, message)
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#if ENABLE(C_LOOP)
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#define EXCEPTION_SCOPE_POSITION_FOR_ASAN(vm__) (vm__).currentCLoopStackPointer()
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#elif ASAN_ENABLED && COMPILER(GCC_COMPATIBLE)
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#define EXCEPTION_SCOPE_POSITION_FOR_ASAN(vm__) currentStackPointer()
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#else
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#define EXCEPTION_SCOPE_POSITION_FOR_ASAN(vm__) nullptr
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#endif
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class ExceptionScope {
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public:
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VM& vm() const { return m_vm; }
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unsigned recursionDepth() const { return m_recursionDepth; }
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Exception* exception() { return m_vm.exception(); }
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ALWAYS_INLINE void assertNoException() { RELEASE_ASSERT_WITH_MESSAGE(!exception(), "%s", unexpectedExceptionMessage().data()); }
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ALWAYS_INLINE void releaseAssertNoException() { RELEASE_ASSERT_WITH_MESSAGE(!exception(), "%s", unexpectedExceptionMessage().data()); }
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#if ASAN_ENABLED || ENABLE(C_LOOP)
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const void* stackPosition() const { return m_location.stackPosition; }
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#else
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const void* stackPosition() const { return this; }
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#endif
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protected:
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ExceptionScope(VM&, ExceptionEventLocation);
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ExceptionScope(const ExceptionScope&) = delete;
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ExceptionScope(ExceptionScope&&) = default;
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~ExceptionScope();
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JS_EXPORT_PRIVATE CString unexpectedExceptionMessage();
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VM& m_vm;
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ExceptionScope* m_previousScope;
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ExceptionEventLocation m_location;
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unsigned m_recursionDepth;
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};
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#else // not ENABLE(EXCEPTION_SCOPE_VERIFICATION)
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#define EXCEPTION_ASSERT(x) ASSERT(x)
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#define EXCEPTION_ASSERT_UNUSED(variable, assertion) ASSERT_UNUSED(variable, assertion)
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#define EXCEPTION_ASSERT_WITH_MESSAGE(assertion, message) ASSERT_WITH_MESSAGE(assertion, message)
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class ExceptionScope {
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public:
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ALWAYS_INLINE VM& vm() const { return m_vm; }
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ALWAYS_INLINE Exception* exception() { return m_vm.exception(); }
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ALWAYS_INLINE void assertNoException() { ASSERT(!exception()); }
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ALWAYS_INLINE void releaseAssertNoException() { RELEASE_ASSERT(!exception()); }
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protected:
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ALWAYS_INLINE ExceptionScope(VM& vm)
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: m_vm(vm)
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{ }
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ExceptionScope(const ExceptionScope&) = delete;
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ExceptionScope(ExceptionScope&&) = default;
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ALWAYS_INLINE CString unexpectedExceptionMessage() { return { }; }
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VM& m_vm;
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};
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#endif // ENABLE(EXCEPTION_SCOPE_VERIFICATION)
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#define RETURN_IF_EXCEPTION(scope__, value__) do { \
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if (UNLIKELY((scope__).exception())) \
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return value__; \
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} while (false)
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#define RELEASE_AND_RETURN(scope__, expression__) do { \
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scope__.release(); \
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return expression__; \
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} while (false)
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} // namespace JSC
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