mirror of
https://github.com/darlinghq/darling-JavaScriptCore.git
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77 lines
2.7 KiB
C++
77 lines
2.7 KiB
C++
/*
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* Copyright (C) 1999-2000 Harri Porten (porten@kde.org)
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* Copyright (C) 2001 Peter Kelly (pmk@post.com)
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* Copyright (C) 2003-2017 Apple Inc. All rights reserved.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*/
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#pragma once
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#include "RegisterState.h"
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#include <wtf/Lock.h>
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#include <wtf/ScopedLambda.h>
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#include <wtf/ThreadGroup.h>
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namespace JSC {
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class CodeBlockSet;
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class ConservativeRoots;
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class Heap;
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class JITStubRoutineSet;
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struct CurrentThreadState {
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void* stackOrigin { nullptr };
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void* stackTop { nullptr };
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RegisterState* registerState { nullptr };
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};
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class MachineThreads {
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WTF_MAKE_FAST_ALLOCATED;
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WTF_MAKE_NONCOPYABLE(MachineThreads);
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public:
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MachineThreads();
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void gatherConservativeRoots(ConservativeRoots&, JITStubRoutineSet&, CodeBlockSet&, CurrentThreadState*, Thread*);
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// Only needs to be called by clients that can use the same heap from multiple threads.
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bool addCurrentThread() { return m_threadGroup->addCurrentThread() == ThreadGroupAddResult::NewlyAdded; }
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WordLock& getLock() { return m_threadGroup->getLock(); }
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const ListHashSet<Ref<Thread>>& threads(const AbstractLocker& locker) const { return m_threadGroup->threads(locker); }
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private:
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void gatherFromCurrentThread(ConservativeRoots&, JITStubRoutineSet&, CodeBlockSet&, CurrentThreadState&);
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void tryCopyOtherThreadStack(Thread&, void*, size_t capacity, size_t*);
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bool tryCopyOtherThreadStacks(const AbstractLocker&, void*, size_t capacity, size_t*, Thread&);
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std::shared_ptr<ThreadGroup> m_threadGroup;
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};
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#define DECLARE_AND_COMPUTE_CURRENT_THREAD_STATE(stateName) \
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CurrentThreadState stateName; \
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stateName.stackTop = &stateName; \
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stateName.stackOrigin = Thread::current().stack().origin(); \
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ALLOCATE_AND_GET_REGISTER_STATE(stateName ## _registerState); \
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stateName.registerState = &stateName ## _registerState
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// The return value is meaningless. We just use it to suppress tail call optimization.
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int callWithCurrentThreadState(const ScopedLambda<void(CurrentThreadState&)>&);
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} // namespace JSC
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