/* * Copyright (C) 2016 Apple Inc. All rights reserved. * Copyright (C) 2017 Yusuke Suzuki <utatane.tea@gmail.com>. * * 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 #if ENABLE(JIT) #include "CCallHelpers.h" namespace JSC { class SnippetParams; typedef CCallHelpers::JumpList SnippetCompilerFunction(CCallHelpers&, SnippetParams&); typedef SharedTask<SnippetCompilerFunction> SnippetCompiler; // Snippet is the way to inject an opaque code generator into DFG and FTL. // While B3::Patchpoint is self-contained about its compilation information, // Snippet depends on which DFG Node invokes. For example, CheckDOM will // link returned failureCases to BadType OSRExit, but this information is offered // from CheckDOM DFG Node, not from this snippet. This snippet mainly focuses // on injecting a snippet generator that can tell register usage and can be used // in both DFG and FTL. class Snippet : public ThreadSafeRefCounted<Snippet> { public: static Ref<Snippet> create() { return adoptRef(*new Snippet()); } template<typename Functor> void setGenerator(const Functor& functor) { m_generator = createSharedTask<SnippetCompilerFunction>(functor); } RefPtr<SnippetCompiler> generator() const { return m_generator; } uint8_t numGPScratchRegisters { 0 }; uint8_t numFPScratchRegisters { 0 }; protected: Snippet() = default; private: RefPtr<SnippetCompiler> m_generator; }; } #endif