Mercurial > hg > truffle
view src/share/vm/utilities/events.hpp @ 1359:23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
Summary: Make sure that two marking cycles do not overlap, i.e., a new one can only start after the concurrent marking thread finishes all its work. In the fix I piggy-back a couple of minor extra fixes: some general code reformatting for consistency (only around the code I modified), the removal of a field (G1CollectorPolicy::_should_initiate_conc_mark) which doesn't seem to be used at all (it's only set but never read), as well as moving the "is GC locker active" test earlier into the G1 pause / Full GC and using a more appropriate method for it.
Reviewed-by: johnc, jmasa, jcoomes, ysr
author | tonyp |
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date | Tue, 06 Apr 2010 10:59:45 -0400 |
parents | a61af66fc99e |
children | c18cbe5936b8 |
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/* * 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);