void CallLinkInfo::visitWeak(RepatchBuffer& repatchBuffer)
{
if (isLinked()) {
if (stub) {
if (!Heap::isMarked(stub->executable())) {
if (Options::verboseOSR()) {
dataLog(
"Clearing closure call from ", *repatchBuffer.codeBlock(), " to ",
stub->executable()->hashFor(specializationKind()),
", stub routine ", RawPointer(stub.get()), ".\n");
}
unlink(repatchBuffer);
}
} else if (!Heap::isMarked(callee.get())) {
if (Options::verboseOSR()) {
dataLog(
"Clearing call from ", *repatchBuffer.codeBlock(), " to ",
RawPointer(callee.get()), " (",
callee.get()->executable()->hashFor(specializationKind()),
").\n");
}
unlink(repatchBuffer);
}
}
if (!!lastSeenCallee && !Heap::isMarked(lastSeenCallee.get()))
lastSeenCallee.clear();
}
void CallLinkInfo::unlink(RepatchBuffer& repatchBuffer)
{
ASSERT(isLinked());
if (Options::showDisassembly())
dataLog("Unlinking call from ", callReturnLocation, " to ", pointerDump(repatchBuffer.codeBlock()), "\n");
repatchBuffer.revertJumpReplacementToBranchPtrWithPatch(RepatchBuffer::startOfBranchPtrWithPatchOnRegister(hotPathBegin), static_cast<MacroAssembler::RegisterID>(calleeGPR), 0);
repatchBuffer.relink(
callReturnLocation,
repatchBuffer.codeBlock()->vm()->getCTIStub(linkThunkGeneratorFor(
(callType == Construct || callType == ConstructVarargs)? CodeForConstruct : CodeForCall,
isFTL ? MustPreserveRegisters : RegisterPreservationNotRequired)).code());
hasSeenShouldRepatch = false;
callee.clear();
stub.clear();
// It will be on a list if the callee has a code block.
if (isOnList())
remove();
}
void CallLinkInfo::visitWeak(RepatchBuffer& repatchBuffer)
{
auto handleSpecificCallee = [&] (JSFunction* callee) {
if (Heap::isMarked(callee->executable()))
m_hasSeenClosure = true;
else
m_clearedByGC = true;
};
if (isLinked()) {
if (stub()) {
if (!stub()->visitWeak(repatchBuffer)) {
if (Options::verboseOSR()) {
dataLog(
"Clearing closure call from ", *repatchBuffer.codeBlock(), " to ",
listDump(stub()->variants()), ", stub routine ", RawPointer(stub()),
".\n");
}
unlink(repatchBuffer);
m_clearedByGC = true;
}
} else if (!Heap::isMarked(m_callee.get())) {
if (Options::verboseOSR()) {
dataLog(
"Clearing call from ", *repatchBuffer.codeBlock(), " to ",
RawPointer(m_callee.get()), " (",
m_callee.get()->executable()->hashFor(specializationKind()),
").\n");
}
handleSpecificCallee(m_callee.get());
unlink(repatchBuffer);
}
}
if (haveLastSeenCallee() && !Heap::isMarked(lastSeenCallee())) {
handleSpecificCallee(lastSeenCallee());
clearLastSeenCallee();
}
}