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comparison src/share/vm/utilities/events.hpp @ 0:a61af66fc99e jdk7-b24

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author duke
date Sat, 01 Dec 2007 00:00:00 +0000
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1 /*
2 * Copyright 1997-2003 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 * have any questions.
22 *
23 */
24
25 // Events and EventMark provide interfaces to log events taking place in the vm.
26 // This facility is extremly useful for post-mortem debugging. The eventlog
27 // often provides crucial information about events leading up to the crash.
28 //
29 // All arguments past the format string must be passed as an intptr_t.
30 //
31 // To log a single event use:
32 // Events::log("New nmethod has been created " INTPTR_FORMAT, nm);
33 //
34 // To log a block of events use:
35 // EventMark m("GarbageCollecting %d", (intptr_t)gc_number);
36 //
37 // The constructor to eventlog indents the eventlog until the
38 // destructor has been executed.
39 //
40 // IMPLEMENTATION RESTRICTION:
41 // Max 3 arguments are saved for each logged event.
42 //
43
44 class Events : AllStatic {
45 public:
46 // Logs an event, format as printf
47 static void log(const char* format, ...) PRODUCT_RETURN;
48
49 // Prints all events in the buffer
50 static void print_all(outputStream* st) PRODUCT_RETURN;
51
52 // Prints last number events from the event buffer
53 static void print_last(outputStream *st, int number) PRODUCT_RETURN;
54 };
55
56 class EventMark : public StackObj {
57 public:
58 // log a begin event, format as printf
59 EventMark(const char* format, ...) PRODUCT_RETURN;
60 // log an end event
61 ~EventMark() PRODUCT_RETURN;
62 };
63
64 int print_all_events(outputStream *st);