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comparison src/share/vm/runtime/sweeper.cpp @ 4945:cfdfbeac0a5b

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7145345: Code cache sweeper must cooperate with safepoints Summary: Safepoint in the sweeper loop in necessary Reviewed-by: kvn, never
author iveresov
date Wed, 15 Feb 2012 12:32:03 -0800
parents f52ed367b66d
children 33df1aeaebbf d2a62e0f25eb
comparison
equal deleted inserted replaced
4944:09d00c18e323 4945:cfdfbeac0a5b
264 { 264 {
265 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); 265 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
266 266
267 // The last invocation iterates until there are no more nmethods 267 // The last invocation iterates until there are no more nmethods
268 for (int i = 0; (i < todo || _invocations == 1) && _current != NULL; i++) { 268 for (int i = 0; (i < todo || _invocations == 1) && _current != NULL; i++) {
269 269 if (SafepointSynchronize::is_synchronizing()) { // Safepoint request
270 if (PrintMethodFlushing && Verbose) {
271 tty->print_cr("### Sweep at %d out of %d, invocation: %d, yielding to safepoint", _seen, CodeCache::nof_nmethods(), _invocations);
272 }
273 MutexUnlockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
274
275 assert(Thread::current()->is_Java_thread(), "should be java thread");
276 JavaThread* thread = (JavaThread*)Thread::current();
277 ThreadBlockInVM tbivm(thread);
278 thread->java_suspend_self();
279 }
270 // Since we will give up the CodeCache_lock, always skip ahead 280 // Since we will give up the CodeCache_lock, always skip ahead
271 // to the next nmethod. Other blobs can be deleted by other 281 // to the next nmethod. Other blobs can be deleted by other
272 // threads but nmethods are only reclaimed by the sweeper. 282 // threads but nmethods are only reclaimed by the sweeper.
273 nmethod* next = CodeCache::next_nmethod(_current); 283 nmethod* next = CodeCache::next_nmethod(_current);
274 284