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 "runtime/mutexLocker.hpp"
  28 #include "runtime/os.inline.hpp"
  29 #include "runtime/osThread.hpp"
  30 #include "runtime/thread.inline.hpp"
  31 #include "runtime/threadCritical.hpp"
  32 #include "runtime/threadLocalStorage.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 StringEventLog* Events::_deopt_messages = NULL;
  42 
  43 EventLog::EventLog() {
  44   // This normally done during bootstrap when we're only single
  45   // threaded but use a ThreadCritical to ensure inclusion in case
  46   // some are created slightly late.
  47   ThreadCritical tc;
  48   _next = Events::_logs;
  49   Events::_logs = this;
  50 }
  51 
  52 // For each registered event logger, print out the current contents of
  53 // the buffer.  This is normally called when the JVM is crashing.
  54 void Events::print_all(outputStream* out) {
  55   EventLog* log = _logs;
  56   while (log != NULL) {
  57     log->print_log_on(out);
  58     log = log->next();
  59   }
  60 }
  61 
  62 void Events::print() {
  63   print_all(tty);
  64 }
  65 
  66 void Events::init() {
  67   if (LogEvents) {
  68     _messages = new StringEventLog("Events");
  69     _exceptions = new StringEventLog("Internal exceptions");
  70     _redefinitions = new StringEventLog("Classes redefined");
  71     _deopt_messages = new StringEventLog("Deoptimization events");
  72   }
  73 }
  74 
  75 void eventlog_init() {
  76   Events::init();
  77 }
  78 
  79 ///////////////////////////////////////////////////////////////////////////
  80 // EventMark
  81 
  82 EventMark::EventMark(const char* format, ...) {
  83   if (LogEvents) {
  84     va_list ap;
  85     va_start(ap, format);
  86     // Save a copy of begin message and log it.
  87     _buffer.printv(format, ap);
  88     Events::log(NULL, "%s", _buffer.buffer());
  89     va_end(ap);
  90   }
  91 }
  92 
  93 EventMark::~EventMark() {
  94   if (LogEvents) {
  95     // Append " done" to the begin message and log it
  96     _buffer.append(" done");
  97     Events::log(NULL, "%s", _buffer.buffer());
  98   }
  99 }