65 lines
2.3 KiB
C++
65 lines
2.3 KiB
C++
/*
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* Copyright (c) 1997, 2003, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*
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*/
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// Events and EventMark provide interfaces to log events taking place in the vm.
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// This facility is extremly useful for post-mortem debugging. The eventlog
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// often provides crucial information about events leading up to the crash.
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//
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// All arguments past the format string must be passed as an intptr_t.
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//
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// To log a single event use:
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// Events::log("New nmethod has been created " INTPTR_FORMAT, nm);
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//
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// To log a block of events use:
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// EventMark m("GarbageCollecting %d", (intptr_t)gc_number);
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//
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// The constructor to eventlog indents the eventlog until the
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// destructor has been executed.
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//
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// IMPLEMENTATION RESTRICTION:
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// Max 3 arguments are saved for each logged event.
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//
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class Events : AllStatic {
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public:
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// Logs an event, format as printf
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static void log(const char* format, ...) PRODUCT_RETURN;
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// Prints all events in the buffer
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static void print_all(outputStream* st) PRODUCT_RETURN;
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// Prints last number events from the event buffer
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static void print_last(outputStream *st, int number) PRODUCT_RETURN;
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};
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class EventMark : public StackObj {
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public:
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// log a begin event, format as printf
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EventMark(const char* format, ...) PRODUCT_RETURN;
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// log an end event
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~EventMark() PRODUCT_RETURN;
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};
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int print_all_events(outputStream *st);
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