src/hotspot/share/runtime/synchronizer.cpp

*** 256,268 ****
    return false;        // revert to slow-path
  }
  
  // -----------------------------------------------------------------------------
  // Monitor Enter/Exit
! // The interpreter and compiler use some assembly copies of this code. Make sure
! // update those code if the following function is changed. The implementation
! // is extremely sensitive to race condition. Be careful.
  
  void ObjectSynchronizer::enter(Handle obj, BasicLock* lock, TRAPS) {
    if (UseBiasedLocking) {
      if (!SafepointSynchronize::is_at_safepoint()) {
        BiasedLocking::revoke(obj, THREAD);
--- 256,268 ----
    return false;        // revert to slow-path
  }
  
  // -----------------------------------------------------------------------------
  // Monitor Enter/Exit
! // The interpreter and compiler assembly code tries to lock using the fast path
! // of this algorithm. Make sure to update that code if the following function is
! // changed. The implementation is extremely sensitive to race condition. Be careful.
  
  void ObjectSynchronizer::enter(Handle obj, BasicLock* lock, TRAPS) {
    if (UseBiasedLocking) {
      if (!SafepointSynchronize::is_at_safepoint()) {
        BiasedLocking::revoke(obj, THREAD);