Mercurial > hg > truffle
diff src/share/vm/utilities/events.hpp @ 0:a61af66fc99e jdk7-b24
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author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
parents | |
children | c18cbe5936b8 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/share/vm/utilities/events.hpp Sat Dec 01 00:00:00 2007 +0000 @@ -0,0 +1,64 @@ +/* + * Copyright 1997-2003 Sun Microsystems, Inc. All Rights Reserved. + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * 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 www.sun.com 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. +// +// IMPLEMENTATION RESTRICTION: +// Max 3 arguments are saved for each logged event. +// + +class Events : AllStatic { + public: + // 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 { + public: + // 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);