23 */
24
25 #include "precompiled.hpp"
26 #include "compiler/compileBroker.hpp"
27 #include "gc/shared/collectedHeap.hpp"
28 #include "jfr/jfrEvents.hpp"
29 #include "jfr/support/jfrThreadId.hpp"
30 #include "logging/log.hpp"
31 #include "logging/logStream.hpp"
32 #include "logging/logConfiguration.hpp"
33 #include "memory/resourceArea.hpp"
34 #include "memory/universe.hpp"
35 #include "oops/method.hpp"
36 #include "oops/oop.inline.hpp"
37 #include "oops/verifyOopClosure.hpp"
38 #include "runtime/handles.inline.hpp"
39 #include "runtime/interfaceSupport.inline.hpp"
40 #include "runtime/mutexLocker.hpp"
41 #include "runtime/os.hpp"
42 #include "runtime/safepoint.hpp"
43 #include "runtime/thread.inline.hpp"
44 #include "runtime/vmThread.hpp"
45 #include "runtime/vmOperations.hpp"
46 #include "services/runtimeService.hpp"
47 #include "utilities/dtrace.hpp"
48 #include "utilities/events.hpp"
49 #include "utilities/vmError.hpp"
50 #include "utilities/xmlstream.hpp"
51
52 VMOperationQueue::VMOperationQueue() {
53 // The queue is a circular doubled-linked list, which always contains
54 // one element (i.e., one element means empty).
55 for(int i = 0; i < nof_priorities; i++) {
56 _queue_length[i] = 0;
57 _queue_counter = 0;
58 _queue[i] = new VM_None("QueueHead");
59 _queue[i]->set_next(_queue[i]);
60 _queue[i]->set_prev(_queue[i]);
61 }
62 _drain_list = NULL;
293 : VMThreadPriority;
294 // Note that I cannot call os::set_priority because it expects Java
295 // priorities and I am *explicitly* using OS priorities so that it's
296 // possible to set the VM thread priority higher than any Java thread.
297 os::set_native_priority( this, prio );
298
299 // Wait for VM_Operations until termination
300 this->loop();
301
302 // Note the intention to exit before safepointing.
303 // 6295565 This has the effect of waiting for any large tty
304 // outputs to finish.
305 if (xtty != NULL) {
306 ttyLocker ttyl;
307 xtty->begin_elem("destroy_vm");
308 xtty->stamp();
309 xtty->end_elem();
310 assert(should_terminate(), "termination flag must be set");
311 }
312
313 // 4526887 let VM thread exit at Safepoint
314 _cur_vm_operation = &halt_op;
315 SafepointSynchronize::begin();
316
317 if (VerifyBeforeExit) {
318 HandleMark hm(VMThread::vm_thread());
319 // Among other things, this ensures that Eden top is correct.
320 Universe::heap()->prepare_for_verify();
321 // Silent verification so as not to pollute normal output,
322 // unless we really asked for it.
323 Universe::verify();
324 }
325
326 CompileBroker::set_should_block();
327
328 // wait for threads (compiler threads or daemon threads) in the
329 // _thread_in_native state to block.
330 VM_Exit::wait_for_threads_in_native_to_block();
331
332 // signal other threads that VM process is gone
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23 */
24
25 #include "precompiled.hpp"
26 #include "compiler/compileBroker.hpp"
27 #include "gc/shared/collectedHeap.hpp"
28 #include "jfr/jfrEvents.hpp"
29 #include "jfr/support/jfrThreadId.hpp"
30 #include "logging/log.hpp"
31 #include "logging/logStream.hpp"
32 #include "logging/logConfiguration.hpp"
33 #include "memory/resourceArea.hpp"
34 #include "memory/universe.hpp"
35 #include "oops/method.hpp"
36 #include "oops/oop.inline.hpp"
37 #include "oops/verifyOopClosure.hpp"
38 #include "runtime/handles.inline.hpp"
39 #include "runtime/interfaceSupport.inline.hpp"
40 #include "runtime/mutexLocker.hpp"
41 #include "runtime/os.hpp"
42 #include "runtime/safepoint.hpp"
43 #include "runtime/synchronizer.hpp"
44 #include "runtime/thread.inline.hpp"
45 #include "runtime/vmThread.hpp"
46 #include "runtime/vmOperations.hpp"
47 #include "services/runtimeService.hpp"
48 #include "utilities/dtrace.hpp"
49 #include "utilities/events.hpp"
50 #include "utilities/vmError.hpp"
51 #include "utilities/xmlstream.hpp"
52
53 VMOperationQueue::VMOperationQueue() {
54 // The queue is a circular doubled-linked list, which always contains
55 // one element (i.e., one element means empty).
56 for(int i = 0; i < nof_priorities; i++) {
57 _queue_length[i] = 0;
58 _queue_counter = 0;
59 _queue[i] = new VM_None("QueueHead");
60 _queue[i]->set_next(_queue[i]);
61 _queue[i]->set_prev(_queue[i]);
62 }
63 _drain_list = NULL;
294 : VMThreadPriority;
295 // Note that I cannot call os::set_priority because it expects Java
296 // priorities and I am *explicitly* using OS priorities so that it's
297 // possible to set the VM thread priority higher than any Java thread.
298 os::set_native_priority( this, prio );
299
300 // Wait for VM_Operations until termination
301 this->loop();
302
303 // Note the intention to exit before safepointing.
304 // 6295565 This has the effect of waiting for any large tty
305 // outputs to finish.
306 if (xtty != NULL) {
307 ttyLocker ttyl;
308 xtty->begin_elem("destroy_vm");
309 xtty->stamp();
310 xtty->end_elem();
311 assert(should_terminate(), "termination flag must be set");
312 }
313
314 if (AsyncDeflateIdleMonitors && log_is_enabled(Info, monitorinflation)) {
315 // AsyncDeflateIdleMonitors does a special deflation at the final
316 // safepoint in order to reduce the in-use monitor population that
317 // is reported by ObjectSynchronizer::log_in_use_monitor_details()
318 // at VM exit.
319 ObjectSynchronizer::set_is_special_deflation_requested(true);
320 }
321
322 // 4526887 let VM thread exit at Safepoint
323 _cur_vm_operation = &halt_op;
324 SafepointSynchronize::begin();
325
326 if (VerifyBeforeExit) {
327 HandleMark hm(VMThread::vm_thread());
328 // Among other things, this ensures that Eden top is correct.
329 Universe::heap()->prepare_for_verify();
330 // Silent verification so as not to pollute normal output,
331 // unless we really asked for it.
332 Universe::verify();
333 }
334
335 CompileBroker::set_should_block();
336
337 // wait for threads (compiler threads or daemon threads) in the
338 // _thread_in_native state to block.
339 VM_Exit::wait_for_threads_in_native_to_block();
340
341 // signal other threads that VM process is gone
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