#include "config.h"
#include "CallLinkInfo.h"
#include "DFGOperations.h"
#include "DFGThunks.h"
#include "JSCInlines.h"
#include "RepatchBuffer.h"
#include <wtf/NeverDestroyed.h>
#if ENABLE(JIT)
namespace JSC {
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();
if (isOnList())
remove();
}
void CallLinkInfo::visitWeak(RepatchBuffer& repatchBuffer)
{
if (isLinked()) {
if (stub) {
if (!Heap::isMarked(stub->structure())
|| !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();
}
CallLinkInfo& CallLinkInfo::dummy()
{
static NeverDestroyed<CallLinkInfo> dummy;
return dummy;
}
} #endif // ENABLE(JIT)