view src/share/vm/utilities/events.hpp @ 1239:9dcad51c5c70

Added tag hs15-b03 for changeset 2581d90c6c9b
author trims
date Thu, 11 Feb 2010 20:37:01 -0800
children c18cbe5936b8
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 * Copyright 1997-2003 Sun Microsystems, Inc.  All Rights Reserved.
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
 * CA 95054 USA or visit if you need additional information or
 * have any questions.

// Events and EventMark provide interfaces to log events taking place in the vm.
// This facility is extremly useful for post-mortem debugging. The eventlog
// often provides crucial information about events leading up to the crash.
// All arguments past the format string must be passed as an intptr_t.
// To log a single event use:
//    Events::log("New nmethod has been created " INTPTR_FORMAT, nm);
// To log a block of events use:
//    EventMark m("GarbageCollecting %d", (intptr_t)gc_number);
// The constructor to eventlog indents the eventlog until the
// destructor has been executed.
//   Max 3 arguments are saved for each logged event.

class Events : AllStatic {
  // Logs an event, format as printf
  static void log(const char* format, ...) PRODUCT_RETURN;

  // Prints all events in the buffer
  static void print_all(outputStream* st) PRODUCT_RETURN;

  // Prints last number events from the event buffer
  static void print_last(outputStream *st, int number) PRODUCT_RETURN;

class EventMark : public StackObj {
  // log a begin event, format as printf
  EventMark(const char* format, ...) PRODUCT_RETURN;
  // log an end event
  ~EventMark() PRODUCT_RETURN;

int print_all_events(outputStream *st);