1 /* 2 * Copyright (c) 1997, 2015, 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 "memory/allocation.inline.hpp" 27 #include "oops/instanceKlass.hpp" 28 #include "runtime/mutexLocker.hpp" 29 #include "runtime/os.inline.hpp" 30 #include "runtime/osThread.hpp" 31 #include "runtime/thread.inline.hpp" 32 #include "runtime/threadCritical.hpp" 33 #include "runtime/timer.hpp" 34 #include "utilities/events.hpp" 35 36 37 EventLog* Events::_logs = NULL; 38 StringEventLog* Events::_messages = NULL; 39 StringEventLog* Events::_exceptions = NULL; 40 StringEventLog* Events::_redefinitions = NULL; 41 UnloadingEventLog* Events::_class_unloading = NULL; 42 StringEventLog* Events::_deopt_messages = NULL; 43 44 EventLog::EventLog() { 45 // This normally done during bootstrap when we're only single 46 // threaded but use a ThreadCritical to ensure inclusion in case 47 // some are created slightly late. 48 ThreadCritical tc; 49 _next = Events::_logs; 50 Events::_logs = this; 51 } 52 53 // For each registered event logger, print out the current contents of 54 // the buffer. This is normally called when the JVM is crashing. 55 void Events::print_all(outputStream* out) { 56 EventLog* log = _logs; 57 while (log != NULL) { 58 log->print_log_on(out); 59 log = log->next(); 60 } 61 } 62 63 void Events::print() { 64 print_all(tty); 65 } 66 67 void Events::init() { 68 if (LogEvents) { 69 _messages = new StringEventLog("Events"); 70 _exceptions = new StringEventLog("Internal exceptions"); 71 _redefinitions = new StringEventLog("Classes redefined"); 72 _class_unloading = new UnloadingEventLog("Classes unloaded"); 73 _deopt_messages = new StringEventLog("Deoptimization events"); 74 } 75 } 76 77 void eventlog_init() { 78 Events::init(); 79 } 80 81 /////////////////////////////////////////////////////////////////////////// 82 // EventMark 83 84 EventMark::EventMark(const char* format, ...) { 85 if (LogEvents) { 86 va_list ap; 87 va_start(ap, format); 88 // Save a copy of begin message and log it. 89 _buffer.printv(format, ap); 90 Events::log(NULL, "%s", _buffer.buffer()); 91 va_end(ap); 92 } 93 } 94 95 EventMark::~EventMark() { 96 if (LogEvents) { 97 // Append " done" to the begin message and log it 98 _buffer.append(" done"); 99 Events::log(NULL, "%s", _buffer.buffer()); 100 } 101 } 102 103 void UnloadingEventLog::log(Thread* thread, InstanceKlass* ik) { 104 if (!should_log()) return; 105 106 double timestamp = fetch_timestamp(); 107 // Unloading events are single threaded. 108 int index = compute_log_index(); 109 _records[index].thread = thread; 110 _records[index].timestamp = timestamp; 111 stringStream st = _records[index].data.stream(); 112 st.print("Unloading class " INTPTR_FORMAT " ", p2i(ik)); 113 ik->name()->print_value_on(&st); 114 }