PolymorphicCallStubRoutine.cpp [plain text]
#include "config.h"
#include "PolymorphicCallStubRoutine.h"
#if ENABLE(JIT)
#include "CallLinkInfo.h"
#include "CodeBlock.h"
#include "FullCodeOrigin.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 ", FullCodeOrigin(callerFrame->codeBlock(), 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
{
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;
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);
}
}
#endif // ENABLE(JIT)