| /* |
| * Copyright (C) 2013-2020 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. |
| */ |
| |
| #include "config.h" |
| #include "DFGDesiredIdentifiers.h" |
| |
| #if ENABLE(DFG_JIT) |
| |
| #include "CodeBlock.h" |
| #include "DFGCommonData.h" |
| #include "IdentifierInlines.h" |
| |
| namespace JSC { namespace DFG { |
| |
| DesiredIdentifiers::DesiredIdentifiers() |
| : m_codeBlock(nullptr) |
| , m_didProcessIdentifiers(false) |
| { |
| } |
| |
| DesiredIdentifiers::DesiredIdentifiers(CodeBlock* codeBlock) |
| : m_codeBlock(codeBlock) |
| , m_didProcessIdentifiers(false) |
| { |
| } |
| |
| DesiredIdentifiers::~DesiredIdentifiers() |
| { |
| } |
| |
| unsigned DesiredIdentifiers::numberOfIdentifiers() |
| { |
| return m_codeBlock->numberOfIdentifiers() + m_addedIdentifiers.size(); |
| } |
| |
| unsigned DesiredIdentifiers::ensure(UniquedStringImpl* rep) |
| { |
| if (!m_didProcessIdentifiers) { |
| // Do this now instead of the constructor so that we don't pay the price on the main |
| // thread. Also, not all compilations need to call ensure(). |
| for (unsigned index = m_codeBlock->numberOfIdentifiers(); index--;) |
| m_identifierNumberForName.add(m_codeBlock->identifier(index).impl(), index); |
| m_didProcessIdentifiers = true; |
| } |
| |
| auto addResult = m_identifierNumberForName.add(rep, numberOfIdentifiers()); |
| unsigned result = addResult.iterator->value; |
| if (addResult.isNewEntry) { |
| m_addedIdentifiers.append(rep); |
| ASSERT(at(result) == rep); |
| } |
| return result; |
| } |
| |
| UniquedStringImpl* DesiredIdentifiers::at(unsigned index) const |
| { |
| UniquedStringImpl* result; |
| if (index < m_codeBlock->numberOfIdentifiers()) |
| result = m_codeBlock->identifier(index).impl(); |
| else |
| result = m_addedIdentifiers[index - m_codeBlock->numberOfIdentifiers()]; |
| ASSERT(result->hasAtLeastOneRef()); |
| return result; |
| } |
| |
| void DesiredIdentifiers::reallyAdd(VM& vm, CommonData* commonData) |
| { |
| for (auto rep : m_addedIdentifiers) { |
| ASSERT(rep->hasAtLeastOneRef()); |
| Identifier uid = Identifier::fromUid(vm, rep); |
| { |
| ConcurrentJSLocker locker(m_codeBlock->m_lock); |
| commonData->dfgIdentifiers.append(WTFMove(uid)); |
| } |
| } |
| } |
| |
| } } // namespace JSC::DFG |
| |
| #endif // ENABLE(DFG_JIT) |
| |