mirror of
https://github.com/darlinghq/darling-JavaScriptCore.git
synced 2025-04-16 05:49:58 +00:00
127 lines
4.2 KiB
C++
127 lines
4.2 KiB
C++
/*
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* Copyright (C) 2012 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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#include "config.h"
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#include "JITStubRoutineSet.h"
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#if ENABLE(JIT)
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#include "GCAwareJITStubRoutine.h"
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#include "JSCInlines.h"
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#include "SlotVisitor.h"
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namespace JSC {
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JITStubRoutineSet::JITStubRoutineSet() { }
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JITStubRoutineSet::~JITStubRoutineSet()
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{
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for (size_t i = m_listOfRoutines.size(); i--;) {
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GCAwareJITStubRoutine* routine = m_listOfRoutines[i];
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routine->m_mayBeExecuting = false;
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if (!routine->m_isJettisoned) {
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// Inform the deref() routine that it should delete this guy as soon
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// as the ref count reaches zero.
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routine->m_isJettisoned = true;
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continue;
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}
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routine->deleteFromGC();
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}
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}
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void JITStubRoutineSet::add(GCAwareJITStubRoutine* routine)
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{
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ASSERT(!routine->m_isJettisoned);
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m_listOfRoutines.append(routine);
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uintptr_t start = routine->startAddress();
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uintptr_t end = routine->endAddress();
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uintptr_t step = JITStubRoutine::addressStep();
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for (uintptr_t iter = start; iter < end; iter += step) {
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ASSERT(m_addressToRoutineMap.find(iter) == m_addressToRoutineMap.end());
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m_addressToRoutineMap.add(iter, routine);
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}
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}
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void JITStubRoutineSet::clearMarks()
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{
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for (size_t i = m_listOfRoutines.size(); i--;)
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m_listOfRoutines[i]->m_mayBeExecuting = false;
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}
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void JITStubRoutineSet::markSlow(uintptr_t address)
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{
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HashMap<uintptr_t, GCAwareJITStubRoutine*>::iterator iter =
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m_addressToRoutineMap.find(address & ~(JITStubRoutine::addressStep() - 1));
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if (iter == m_addressToRoutineMap.end())
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return;
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iter->value->m_mayBeExecuting = true;
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}
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void JITStubRoutineSet::deleteUnmarkedJettisonedStubRoutines()
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{
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for (size_t i = 0; i < m_listOfRoutines.size(); i++) {
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GCAwareJITStubRoutine* routine = m_listOfRoutines[i];
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if (!routine->m_isJettisoned || routine->m_mayBeExecuting)
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continue;
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uintptr_t start = routine->startAddress();
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uintptr_t end = routine->endAddress();
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uintptr_t step = JITStubRoutine::addressStep();
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for (uintptr_t iter = start; iter < end; iter += step) {
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ASSERT(m_addressToRoutineMap.find(iter) != m_addressToRoutineMap.end());
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ASSERT(m_addressToRoutineMap.find(iter)->value == routine);
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m_addressToRoutineMap.remove(iter);
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}
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routine->deleteFromGC();
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m_listOfRoutines[i] = m_listOfRoutines.last();
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m_listOfRoutines.removeLast();
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i--;
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}
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}
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void JITStubRoutineSet::traceMarkedStubRoutines(SlotVisitor& visitor)
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{
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for (size_t i = m_listOfRoutines.size(); i--;) {
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GCAwareJITStubRoutine* routine = m_listOfRoutines[i];
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if (!routine->m_mayBeExecuting)
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continue;
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routine->markRequiredObjects(visitor);
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}
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}
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} // namespace JSC
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#endif // ENABLE(JIT)
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