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 #ifndef SHARE_VM_LEAKPROFILER_STARTOPERATION_HPP 26 #define SHARE_VM_LEAKPROFILER_STARTOPERATION_HPP 27 28 #include "jfr/recorder/jfrRecorder.hpp" 29 #include "jfr/leakprofiler/leakProfiler.hpp" 30 #include "jfr/leakprofiler/sampling/objectSampler.hpp" 31 #include "jfr/recorder/access/jfrOptionSet.hpp" 32 #include "logging/log.hpp" 33 #include "runtime/vm_operations.hpp" 34 35 // Safepoint operation for starting leak profiler object sampler 36 class StartOperation : public VM_Operation { 37 private: 38 jlong _sample_count; 39 public: 40 StartOperation(jlong sample_count) : 41 _sample_count(sample_count) { 42 } 43 44 Mode evaluation_mode() const { 45 return _safepoint; 46 } 47 48 VMOp_Type type() const { 49 return VMOp_GC_HeapInspection; 50 } 51 52 virtual void doit() { 53 assert(!LeakProfiler::is_running(), "invariant"); 54 jint queue_size = JfrOptionSet::old_object_queue_size(); 55 LeakProfiler::set_object_sampler(new ObjectSampler(queue_size)); 56 log_trace(jfr, system)( "Object sampling started"); 57 } 58 }; 59 60 #endif // SHARE_VM_LEAKPROFILER_STARTOPERATION_HPP