| /* |
| * Copyright (C) 2011 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 "DFGOSRExit.h" |
| |
| #if ENABLE(DFG_JIT) |
| |
| #include "DFGAssemblyHelpers.h" |
| #include "DFGSpeculativeJIT.h" |
| |
| namespace JSC { namespace DFG { |
| |
| OSRExit::OSRExit(ExitKind kind, JSValueSource jsValueSource, MethodOfGettingAValueProfile valueProfile, MacroAssembler::Jump check, SpeculativeJIT* jit, unsigned streamIndex, unsigned recoveryIndex) |
| : m_jsValueSource(jsValueSource) |
| , m_valueProfile(valueProfile) |
| , m_check(check) |
| , m_nodeIndex(jit->m_compileIndex) |
| , m_codeOrigin(jit->m_codeOriginForOSR) |
| , m_codeOriginForExitProfile(m_codeOrigin) |
| , m_recoveryIndex(recoveryIndex) |
| , m_watchpointIndex(std::numeric_limits<unsigned>::max()) |
| , m_kind(kind) |
| , m_count(0) |
| , m_streamIndex(streamIndex) |
| , m_lastSetOperand(jit->m_lastSetOperand) |
| { |
| ASSERT(m_codeOrigin.isSet()); |
| } |
| |
| bool OSRExit::considerAddingAsFrequentExitSiteSlow(CodeBlock* dfgCodeBlock, CodeBlock* profiledCodeBlock) |
| { |
| if (static_cast<double>(m_count) / dfgCodeBlock->osrExitCounter() <= Options::osrExitProminenceForFrequentExitSite()) |
| return false; |
| |
| FrequentExitSite exitSite; |
| |
| if (m_kind == ArgumentsEscaped) { |
| // Count this one globally. It doesn't matter where in the code block the arguments excaped; |
| // the fact that they did is not associated with any particular instruction. |
| exitSite = FrequentExitSite(m_kind); |
| } else |
| exitSite = FrequentExitSite(m_codeOriginForExitProfile.bytecodeIndex, m_kind); |
| |
| return baselineCodeBlockForOriginAndBaselineCodeBlock(m_codeOriginForExitProfile, profiledCodeBlock)->addFrequentExitSite(exitSite); |
| } |
| |
| } } // namespace JSC::DFG |
| |
| #endif // ENABLE(DFG_JIT) |
