Mercurial > hg > truffle
annotate src/share/vm/gc_implementation/g1/satbQueue.hpp @ 941:8b46c4d82093
4957990: Perm heap bloat in JVM
Summary: Treat ProfileData in MDO's as a source of weak, not strong, roots. Fixes the bug for stop-world collection -- the case of concurrent collection will be fixed separately.
Reviewed-by: jcoomes, jmasa, kvn, never
| author | ysr |
|---|---|
| date | Wed, 02 Sep 2009 00:04:29 -0700 |
| parents | df6caf649ff7 |
| children | 44f61c24ddab |
| rev | line source |
|---|---|
| 342 | 1 /* |
| 2 * Copyright 2001-2007 Sun Microsystems, Inc. All Rights Reserved. | |
| 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
| 19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
| 20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
| 21 * have any questions. | |
| 22 * | |
| 23 */ | |
| 24 | |
| 25 class ObjectClosure; | |
| 26 class JavaThread; | |
| 27 | |
| 28 // A ptrQueue whose elements are "oops", pointers to object heads. | |
| 29 class ObjPtrQueue: public PtrQueue { | |
| 30 public: | |
| 31 ObjPtrQueue(PtrQueueSet* qset_, bool perm = false) : | |
| 32 PtrQueue(qset_, perm) | |
| 33 {} | |
| 34 // Apply the closure to all elements, and reset the index to make the | |
| 35 // buffer empty. | |
| 36 void apply_closure(ObjectClosure* cl); | |
| 37 | |
| 38 // Apply the closure to all elements of "buf", down to "index" (inclusive.) | |
| 39 static void apply_closure_to_buffer(ObjectClosure* cl, | |
| 40 void** buf, size_t index, size_t sz); | |
| 41 | |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
342
diff
changeset
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42 void verify_oops_in_buffer() NOT_DEBUG_RETURN; |
| 342 | 43 }; |
| 44 | |
| 45 | |
| 46 | |
| 47 class SATBMarkQueueSet: public PtrQueueSet { | |
| 48 ObjectClosure* _closure; | |
| 49 ObjectClosure** _par_closures; // One per ParGCThread. | |
| 50 | |
| 51 ObjPtrQueue _shared_satb_queue; | |
| 52 | |
| 53 // Utility function to support sequential and parallel versions. If | |
| 54 // "par" is true, then "worker" is the par thread id; if "false", worker | |
| 55 // is ignored. | |
| 56 bool apply_closure_to_completed_buffer_work(bool par, int worker); | |
| 57 | |
| 58 | |
| 59 public: | |
| 60 SATBMarkQueueSet(); | |
| 61 | |
| 62 void initialize(Monitor* cbl_mon, Mutex* fl_lock, | |
| 63 int max_completed_queue = 0, | |
| 64 Mutex* lock = NULL); | |
| 65 | |
| 66 static void handle_zero_index_for_thread(JavaThread* t); | |
| 67 | |
| 68 // Apply "set_active(b)" to all thread tloq's. Should be called only | |
| 69 // with the world stopped. | |
| 70 void set_active_all_threads(bool b); | |
| 71 | |
| 72 // Register "blk" as "the closure" for all queues. Only one such closure | |
| 73 // is allowed. The "apply_closure_to_completed_buffer" method will apply | |
| 74 // this closure to a completed buffer, and "iterate_closure_all_threads" | |
| 75 // applies it to partially-filled buffers (the latter should only be done | |
| 76 // with the world stopped). | |
| 77 void set_closure(ObjectClosure* closure); | |
| 78 // Set the parallel closures: pointer is an array of pointers to | |
| 79 // closures, one for each parallel GC thread. | |
| 80 void set_par_closure(int i, ObjectClosure* closure); | |
| 81 | |
| 82 // If there is a registered closure for buffers, apply it to all entries | |
| 83 // in all currently-active buffers. This should only be applied at a | |
| 84 // safepoint. (Currently must not be called in parallel; this should | |
| 85 // change in the future.) | |
| 86 void iterate_closure_all_threads(); | |
| 87 // Parallel version of the above. | |
| 88 void par_iterate_closure_all_threads(int worker); | |
| 89 | |
| 90 // If there exists some completed buffer, pop it, then apply the | |
| 91 // registered closure to all its elements, and return true. If no | |
| 92 // completed buffers exist, return false. | |
| 93 bool apply_closure_to_completed_buffer() { | |
| 94 return apply_closure_to_completed_buffer_work(false, 0); | |
| 95 } | |
| 96 // Parallel version of the above. | |
| 97 bool par_apply_closure_to_completed_buffer(int worker) { | |
| 98 return apply_closure_to_completed_buffer_work(true, worker); | |
| 99 } | |
| 100 | |
| 101 ObjPtrQueue* shared_satb_queue() { return &_shared_satb_queue; } | |
| 102 | |
| 103 // If a marking is being abandoned, reset any unprocessed log buffers. | |
| 104 void abandon_partial_marking(); | |
| 105 | |
| 106 }; |