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src/share/vm/runtime/memprofiler.hpp@2b42b31e7928 (annotated)

src/share/vm/runtime/memprofiler.hpp

Fri, 21 Nov 2008 08:09:11 -0800

author

coleenp

date

Fri, 21 Nov 2008 08:09:11 -0800

changeset 882

2b42b31e7928

parent 435

a61af66fc99e

child 1907

c18cbe5936b8

permissions

-rw-r--r--

6676175: BigApps crash JVM Client VM (build 10.0-b22, mixed mode, sharing) with SIGSEGV (0xb)
Summary: Add test for biased locking epoch before walking own thread stack in case of rare race
Reviewed-by: phh, never

duke@435	1	/*
duke@435	2	* Copyright 1998 Sun Microsystems, Inc. All Rights Reserved.
duke@435	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@435	4	*
duke@435	5	* This code is free software; you can redistribute it and/or modify it
duke@435	6	* under the terms of the GNU General Public License version 2 only, as
duke@435	7	* published by the Free Software Foundation.
duke@435	8	*
duke@435	9	* This code is distributed in the hope that it will be useful, but WITHOUT
duke@435	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@435	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
duke@435	12	* version 2 for more details (a copy is included in the LICENSE file that
duke@435	13	* accompanied this code).
duke@435	14	*
duke@435	15	* You should have received a copy of the GNU General Public License version
duke@435	16	* 2 along with this work; if not, write to the Free Software Foundation,
duke@435	17	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@435	18	*
duke@435	19	* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
duke@435	20	* CA 95054 USA or visit www.sun.com if you need additional information or
duke@435	21	* have any questions.
duke@435	22	*
duke@435	23	*/
duke@435	24
duke@435	25	// Prints periodic memory usage trace of HotSpot VM
duke@435	26
duke@435	27	class MemProfilerTask;
duke@435	28
duke@435	29	class MemProfiler : AllStatic {
duke@435	30	friend class MemProfilerTask;
duke@435	31	private:
duke@435	32	static MemProfilerTask* _task;
duke@435	33	static FILE* _log_fp;
duke@435	34	// Do trace (callback from MemProfilerTask and from disengage)
duke@435	35	static void do_trace() PRODUCT_RETURN;
duke@435	36	public:
duke@435	37	// Start/stop the profiler
duke@435	38	static void engage() PRODUCT_RETURN;
duke@435	39	static void disengage() PRODUCT_RETURN;
duke@435	40	// Tester
duke@435	41	static bool is_active() PRODUCT_RETURN0;
duke@435	42	};