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src/hotspot/share/prims/unsafe.cpp
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@@ -947,31 +947,20 @@
JavaThread* thr = NULL;
oop java_thread = NULL;
(void) tlh.cv_internal_thread_to_JavaThread(jthread, &thr, &java_thread);
if (java_thread != NULL) {
// This is a valid oop.
- jlong lp = java_lang_Thread::park_event(java_thread);
- if (lp != 0) {
- // This cast is OK even though the jlong might have been read
- // non-atomically on 32bit systems, since there, one word will
- // always be zero anyway and the value set is always the same
- p = (Parker*)addr_from_java(lp);
- } else {
- // Not cached in the java.lang.Thread oop yet (could be an
- // older version of library).
if (thr != NULL) {
// The JavaThread is alive.
p = thr->parker();
- if (p != NULL) {
- // Cache the Parker in the java.lang.Thread oop for next time.
- java_lang_Thread::set_park_event(java_thread, addr_to_java(p));
- }
- }
}
}
} // ThreadsListHandle is destroyed here.
+ // 'p' points to type-stable-memory if non-NULL. If the target
+ // thread terminates before we get here the new user of this
+ // Parker will get a 'spurious' unpark - which is perfectly valid.
if (p != NULL) {
HOTSPOT_THREAD_UNPARK((uintptr_t) p);
p->unpark();
}
} UNSAFE_END
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