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diff src/share/vm/gc_implementation/shared/concurrentGCThread.cpp @ 4022:db89aa49298f

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7099824: G1: we should take the pending list lock before doing the remark pause Summary: Acquire the pending list lock in the prologue method of G1's concurrent VM_Operation and release the lock in the epilogue() method. The locking/unlocking order of the pending list lock and the Heap_lock should match that in the prologue and epilogue methods of VM_GC_Operation. Reviewed-by: tonyp, ysr
author johnc
date Thu, 20 Oct 2011 12:06:20 -0700
parents 2a241e764894
children da91efe96a93
line wrap: on
line diff
--- a/src/share/vm/gc_implementation/shared/concurrentGCThread.cpp	Fri Oct 21 12:42:42 2011 -0400
+++ b/src/share/vm/gc_implementation/shared/concurrentGCThread.cpp	Thu Oct 20 12:06:20 2011 -0700
@@ -224,6 +224,8 @@
   MutexLockerEx x(&_monitor, Mutex::_no_safepoint_check_flag);
   assert(_buffer == empty, "Should be empty");
   assert(msg != empty, "empty message");
+  assert(!Heap_lock->owned_by_self(), "Heap_lock owned by requesting thread");
+
   _buffer = msg;
   while (_buffer != empty) {
     _monitor.notify();