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