src/hotspot/share/runtime/biasedLocking.cpp

rev 54936 : imported patch 8221734-v3
rev 54937 : imported patch 8221734-v4

*** 626,635 ****
--- 626,658 ----
    event->set_disableBiasing(!op->is_bulk_rebias());
    event->set_safepointId(op->safepoint_id());
    event->commit();
  }
  
+ BiasedLocking::Condition BiasedLocking::revoke_own_locks_in_handshake(Handle obj, TRAPS) {
+   markOop mark = obj->mark();
+ 
+   if (!mark->has_bias_pattern()) {
+     return NOT_BIASED;
+   }
+ 
+   Klass *k = obj->klass();
+   markOop prototype_header = k->prototype_header();
+   assert(mark->biased_locker() == THREAD &&
+             prototype_header->bias_epoch() == mark->bias_epoch(), "Revoke failed, unhandled biased lock state");
+   ResourceMark rm;
+   log_info(biasedlocking)("Revoking bias by walking my own stack:");
+   EventBiasedLockSelfRevocation event;
+   BiasedLocking::Condition cond = revoke_bias(obj(), false, false, (JavaThread*) THREAD, NULL);
+   ((JavaThread*) THREAD)->set_cached_monitor_info(NULL);
+   assert(cond == BIAS_REVOKED, "why not?");
+   if (event.should_commit()) {
+     post_self_revocation_event(&event, k);
+   }
+   return cond;
+ }
+ 
  BiasedLocking::Condition BiasedLocking::revoke_and_rebias(Handle obj, bool attempt_rebias, TRAPS) {
    assert(!SafepointSynchronize::is_at_safepoint(), "must not be called while at safepoint");
  
    // We can revoke the biases of anonymously-biased objects
    // efficiently enough that we should not cause these revocations to