--- a/hotspot/src/share/vm/runtime/sweeper.cpp Wed Feb 15 10:12:55 2012 -0800
+++ b/hotspot/src/share/vm/runtime/sweeper.cpp Wed Feb 15 12:32:03 2012 -0800
@@ -266,7 +266,17 @@
// The last invocation iterates until there are no more nmethods
for (int i = 0; (i < todo || _invocations == 1) && _current != NULL; i++) {
+ if (SafepointSynchronize::is_synchronizing()) { // Safepoint request
+ if (PrintMethodFlushing && Verbose) {
+ tty->print_cr("### Sweep at %d out of %d, invocation: %d, yielding to safepoint", _seen, CodeCache::nof_nmethods(), _invocations);
+ }
+ MutexUnlockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
+ assert(Thread::current()->is_Java_thread(), "should be java thread");
+ JavaThread* thread = (JavaThread*)Thread::current();
+ ThreadBlockInVM tbivm(thread);
+ thread->java_suspend_self();
+ }
// Since we will give up the CodeCache_lock, always skip ahead
// to the next nmethod. Other blobs can be deleted by other
// threads but nmethods are only reclaimed by the sweeper.