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authorLorry Tar Creator <lorry-tar-importer@lorry>2016-04-10 09:28:39 +0000
committerLorry Tar Creator <lorry-tar-importer@lorry>2016-04-10 09:28:39 +0000
commit32761a6cee1d0dee366b885b7b9c777e67885688 (patch)
treed6bec92bebfb216f4126356e55518842c2f476a1 /Source/JavaScriptCore/jit/PolymorphicCallStubRoutine.cpp
parenta4e969f4965059196ca948db781e52f7cfebf19e (diff)
downloadWebKitGtk-tarball-32761a6cee1d0dee366b885b7b9c777e67885688.tar.gz
webkitgtk-2.4.11webkitgtk-2.4.11
Diffstat (limited to 'Source/JavaScriptCore/jit/PolymorphicCallStubRoutine.cpp')
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diff --git a/Source/JavaScriptCore/jit/PolymorphicCallStubRoutine.cpp b/Source/JavaScriptCore/jit/PolymorphicCallStubRoutine.cpp
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-/*
- * Copyright (C) 2015 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 "PolymorphicCallStubRoutine.h"
-
-#if ENABLE(JIT)
-
-#include "CallLinkInfo.h"
-#include "CodeBlock.h"
-#include "JSCInlines.h"
-#include "LinkBuffer.h"
-
-namespace JSC {
-
-PolymorphicCallNode::~PolymorphicCallNode()
-{
- if (isOnList())
- remove();
-}
-
-void PolymorphicCallNode::unlink(VM& vm)
-{
- if (m_callLinkInfo) {
- if (Options::dumpDisassembly())
- dataLog("Unlinking polymorphic call at ", m_callLinkInfo->callReturnLocation(), ", ", m_callLinkInfo->codeOrigin(), "\n");
-
- m_callLinkInfo->unlink(vm);
- }
-
- if (isOnList())
- remove();
-}
-
-void PolymorphicCallNode::clearCallLinkInfo()
-{
- if (Options::dumpDisassembly())
- dataLog("Clearing call link info for polymorphic call at ", m_callLinkInfo->callReturnLocation(), ", ", m_callLinkInfo->codeOrigin(), "\n");
-
- m_callLinkInfo = nullptr;
-}
-
-void PolymorphicCallCase::dump(PrintStream& out) const
-{
- out.print("<variant = ", m_variant, ", codeBlock = ", pointerDump(m_codeBlock), ">");
-}
-
-PolymorphicCallStubRoutine::PolymorphicCallStubRoutine(
- const MacroAssemblerCodeRef& codeRef, VM& vm, const JSCell* owner, ExecState* callerFrame,
- CallLinkInfo& info, const Vector<PolymorphicCallCase>& cases,
- std::unique_ptr<uint32_t[]> fastCounts)
- : GCAwareJITStubRoutine(codeRef, vm)
- , m_fastCounts(WTFMove(fastCounts))
-{
- for (PolymorphicCallCase callCase : cases) {
- m_variants.append(WriteBarrier<JSCell>(vm, owner, callCase.variant().rawCalleeCell()));
- if (shouldDumpDisassemblyFor(callerFrame->codeBlock()))
- dataLog("Linking polymorphic call in ", *callerFrame->codeBlock(), " at ", callerFrame->codeOrigin(), " to ", callCase.variant(), ", codeBlock = ", pointerDump(callCase.codeBlock()), "\n");
- if (CodeBlock* codeBlock = callCase.codeBlock())
- codeBlock->linkIncomingPolymorphicCall(callerFrame, m_callNodes.add(&info));
- }
- m_variants.shrinkToFit();
- WTF::storeStoreFence();
-}
-
-PolymorphicCallStubRoutine::~PolymorphicCallStubRoutine() { }
-
-CallVariantList PolymorphicCallStubRoutine::variants() const
-{
- CallVariantList result;
- for (size_t i = 0; i < m_variants.size(); ++i)
- result.append(CallVariant(m_variants[i].get()));
- return result;
-}
-
-CallEdgeList PolymorphicCallStubRoutine::edges() const
-{
- // We wouldn't have these if this was an FTL stub routine. We shouldn't be asking for profiling
- // from the FTL.
- RELEASE_ASSERT(m_fastCounts);
-
- CallEdgeList result;
- for (size_t i = 0; i < m_variants.size(); ++i)
- result.append(CallEdge(CallVariant(m_variants[i].get()), m_fastCounts[i]));
- return result;
-}
-
-void PolymorphicCallStubRoutine::clearCallNodesFor(CallLinkInfo* info)
-{
- for (Bag<PolymorphicCallNode>::iterator iter = m_callNodes.begin(); !!iter; ++iter) {
- PolymorphicCallNode& node = **iter;
- // All nodes should point to info, but okay to be a little paranoid.
- if (node.hasCallLinkInfo(info))
- node.clearCallLinkInfo();
- }
-}
-
-bool PolymorphicCallStubRoutine::visitWeak(VM&)
-{
- for (auto& variant : m_variants) {
- if (!Heap::isMarked(variant.get()))
- return false;
- }
- return true;
-}
-
-void PolymorphicCallStubRoutine::markRequiredObjectsInternal(SlotVisitor& visitor)
-{
- for (auto& variant : m_variants)
- visitor.append(&variant);
-}
-
-} // namespace JSC
-
-#endif // ENABLE(JIT)