mirror of
https://github.com/darlinghq/darling-JavaScriptCore.git
synced 2024-11-23 04:09:40 +00:00
103 lines
3.8 KiB
C++
103 lines
3.8 KiB
C++
/*
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* Copyright (C) 2014 Apple Inc. All rights reserved.
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* Copyright (C) 2014 Saam Barati. <saambarati1@gmail.com>
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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 "BasicBlockLocation.h"
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#include "CCallHelpers.h"
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#include <climits>
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#include <wtf/DataLog.h>
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namespace JSC {
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BasicBlockLocation::BasicBlockLocation(int startOffset, int endOffset)
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: m_startOffset(startOffset)
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, m_endOffset(endOffset)
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, m_executionCount(0)
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{
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}
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void BasicBlockLocation::insertGap(int startOffset, int endOffset)
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{
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std::pair<int, int> gap(startOffset, endOffset);
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if (!m_gaps.contains(gap))
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m_gaps.append(gap);
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}
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Vector<std::pair<int, int>> BasicBlockLocation::getExecutedRanges() const
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{
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Vector<Gap> result;
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Vector<Gap> gaps = m_gaps;
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int nextRangeStart = m_startOffset;
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while (gaps.size()) {
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Gap minGap(INT_MAX, 0);
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unsigned minIdx = std::numeric_limits<unsigned>::max();
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for (unsigned idx = 0; idx < gaps.size(); idx++) {
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// Because we know that the Gaps inside m_gaps aren't enclosed within one another, it suffices to just check the first element to test ordering.
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if (gaps[idx].first < minGap.first) {
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minGap = gaps[idx];
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minIdx = idx;
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}
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}
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result.append(Gap(nextRangeStart, minGap.first - 1));
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nextRangeStart = minGap.second + 1;
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gaps.remove(minIdx);
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}
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result.append(Gap(nextRangeStart, m_endOffset));
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return result;
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}
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void BasicBlockLocation::dumpData() const
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{
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Vector<Gap> executedRanges = getExecutedRanges();
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for (Gap gap : executedRanges) {
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dataLogF("\tBasicBlock: [%d, %d] hasExecuted: %s, executionCount:", gap.first, gap.second, hasExecuted() ? "true" : "false");
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dataLogLn(m_executionCount);
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}
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}
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#if ENABLE(JIT)
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#if USE(JSVALUE64)
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void BasicBlockLocation::emitExecuteCode(CCallHelpers& jit) const
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{
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static_assert(sizeof(UCPURegister) == 8, "Assuming size_t is 64 bits on 64 bit platforms.");
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jit.add64(CCallHelpers::TrustedImm32(1), CCallHelpers::AbsoluteAddress(&m_executionCount));
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}
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#else
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void BasicBlockLocation::emitExecuteCode(CCallHelpers& jit, MacroAssembler::RegisterID scratch) const
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{
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static_assert(sizeof(size_t) == 4, "Assuming size_t is 32 bits on 32 bit platforms.");
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jit.load32(&m_executionCount, scratch);
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CCallHelpers::Jump done = jit.branchAdd32(CCallHelpers::Zero, scratch, CCallHelpers::TrustedImm32(1), scratch);
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jit.store32(scratch, bitwise_cast<void*>(&m_executionCount));
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done.link(&jit);
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}
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#endif // USE(JSVALUE64)
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#endif // ENABLE(JIT)
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} // namespace JSC
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