Mercurial > jdk8-mips64-public > hotspot / file comparison
comparison: src/share/vm/jfr/leakprofiler/leakProfiler.cpp
src/share/vm/jfr/leakprofiler/leakProfiler.cpp
- changeset 9858
- b985cbb00e68
- child 9885
- 8e875c964f41
equal
deleted
inserted
replaced
| 9727:c7a3e57fdf4a | 9858:b985cbb00e68 |
|---|---|
| 1 /* | |
| 2 * Copyright (c) 2014, 2018, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | |
| 20 * or visit www.oracle.com if you need additional information or have any | |
| 21 * questions. | |
| 22 * | |
| 23 */ | |
| 24 | |
| 25 #include "precompiled.hpp" | |
| 26 #include "jfr/leakprofiler/emitEventOperation.hpp" | |
| 27 #include "jfr/leakprofiler/leakProfiler.hpp" | |
| 28 #include "jfr/leakprofiler/startOperation.hpp" | |
| 29 #include "jfr/leakprofiler/stopOperation.hpp" | |
| 30 #include "jfr/leakprofiler/sampling/objectSampler.hpp" | |
| 31 #include "jfr/recorder/service/jfrOptionSet.hpp" | |
| 32 #include "memory/iterator.hpp" | |
| 33 #include "oops/oop.hpp" | |
| 34 #include "runtime/atomic.hpp" | |
| 35 #include "runtime/orderAccess.hpp" | |
| 36 #include "runtime/thread.inline.hpp" | |
| 37 #include "runtime/vmThread.hpp" | |
| 38 #include "utilities/ostream.hpp" | |
| 39 | |
| 40 // Only to be updated during safepoint | |
| 41 ObjectSampler* LeakProfiler::_object_sampler = NULL; | |
| 42 | |
| 43 static volatile jbyte suspended = 0; | |
| 44 bool LeakProfiler::start(jint sample_count) { | |
| 45 if (_object_sampler != NULL) { | |
| 46 // already started | |
| 47 return true; | |
| 48 } | |
| 49 // Allows user to disable leak profiler on command line by setting queue size to zero. | |
| 50 if (sample_count > 0) { | |
| 51 StartOperation op(sample_count); | |
| 52 VMThread::execute(&op); | |
| 53 return _object_sampler != NULL; | |
| 54 } | |
| 55 return false; | |
| 56 } | |
| 57 | |
| 58 bool LeakProfiler::stop() { | |
| 59 if (_object_sampler == NULL) { | |
| 60 // already stopped/not started | |
| 61 return true; | |
| 62 } | |
| 63 StopOperation op; | |
| 64 VMThread::execute(&op); | |
| 65 return _object_sampler == NULL; | |
| 66 } | |
| 67 | |
| 68 void LeakProfiler::emit_events(jlong cutoff_ticks, bool emit_all) { | |
| 69 if (!is_running()) { | |
| 70 return; | |
| 71 } | |
| 72 EmitEventOperation op(cutoff_ticks, emit_all); | |
| 73 VMThread::execute(&op); | |
| 74 } | |
| 75 | |
| 76 void LeakProfiler::oops_do(BoolObjectClosure* is_alive, OopClosure* f) { | |
| 77 assert(SafepointSynchronize::is_at_safepoint(), | |
| 78 "Leak Profiler::oops_do(...) may only be called during safepoint"); | |
| 79 | |
| 80 if (_object_sampler != NULL) { | |
| 81 _object_sampler->oops_do(is_alive, f); | |
| 82 } | |
| 83 } | |
| 84 | |
| 85 void LeakProfiler::sample(HeapWord* object, | |
| 86 size_t size, | |
| 87 JavaThread* thread) { | |
| 88 assert(is_running(), "invariant"); | |
| 89 assert(thread != NULL, "invariant"); | |
| 90 assert(thread->thread_state() == _thread_in_vm, "invariant"); | |
| 91 | |
| 92 // exclude compiler threads and code sweeper thread | |
| 93 if (thread->is_hidden_from_external_view()) { | |
| 94 return; | |
| 95 } | |
| 96 | |
| 97 _object_sampler->add(object, size, thread); | |
| 98 } | |
| 99 | |
| 100 ObjectSampler* LeakProfiler::object_sampler() { | |
| 101 assert(is_suspended() || SafepointSynchronize::is_at_safepoint(), | |
| 102 "Leak Profiler::object_sampler() may only be called during safepoint"); | |
| 103 return _object_sampler; | |
| 104 } | |
| 105 | |
| 106 void LeakProfiler::set_object_sampler(ObjectSampler* object_sampler) { | |
| 107 assert(SafepointSynchronize::is_at_safepoint(), | |
| 108 "Leak Profiler::set_object_sampler() may only be called during safepoint"); | |
| 109 _object_sampler = object_sampler; | |
| 110 } | |
| 111 | |
| 112 bool LeakProfiler::is_running() { | |
| 113 return _object_sampler != NULL && !suspended; | |
| 114 } | |
| 115 | |
| 116 bool LeakProfiler::is_suspended() { | |
| 117 return _object_sampler != NULL && suspended; | |
| 118 } | |
| 119 | |
| 120 void LeakProfiler::resume() { | |
| 121 assert(is_suspended(), "invariant"); | |
| 122 OrderAccess::storestore(); | |
| 123 Atomic::store((jbyte)0, &suspended); | |
| 124 assert(is_running(), "invariant"); | |
| 125 } | |
| 126 | |
| 127 void LeakProfiler::suspend() { | |
| 128 assert(SafepointSynchronize::is_at_safepoint(), "invariant"); | |
| 129 assert(_object_sampler != NULL, "invariant"); | |
| 130 assert(!is_suspended(), "invariant"); | |
| 131 suspended = (jbyte)1; // safepoint visible | |
| 132 } |
