#include "config.h"
#include "CallLinkInfo.h"
#include "DFGOperations.h"
#include "DFGThunks.h"
#include "JSCInlines.h"
#include "Repatch.h"
#include "RepatchBuffer.h"
#include <wtf/ListDump.h>
#include <wtf/NeverDestroyed.h>
#if ENABLE(JIT)
namespace JSC {
void CallLinkInfo::clearStub()
{
if (!stub())
return;
m_stub->clearCallNodesFor(this);
m_stub = nullptr;
}
void CallLinkInfo::unlink(RepatchBuffer& repatchBuffer)
{
if (!isLinked()) {
RELEASE_ASSERT(!isOnList());
return;
}
unlinkFor(
repatchBuffer, *this,
(m_callType == Construct || m_callType == ConstructVarargs)? CodeForConstruct : CodeForCall,
m_isFTL ? MustPreserveRegisters : RegisterPreservationNotRequired);
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();
}
}
CallLinkInfo& CallLinkInfo::dummy()
{
static NeverDestroyed<CallLinkInfo> dummy;
return dummy;
}
} #endif // ENABLE(JIT)