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src/share/vm/gc_interface/gcCause.hpp@0ede345ec7c9 (annotated)

src/share/vm/gc_interface/gcCause.hpp

Wed, 13 Mar 2013 15:15:56 -0400

author

coleenp

date

Wed, 13 Mar 2013 15:15:56 -0400

changeset 4718

0ede345ec7c9

parent 4391

0b54ffe4c2d3

child 5237

f2110083203d

permissions

-rw-r--r--

8009829: CDS: JDK JPRT test fails crash in Symbol::equals()
Summary: -Xshare:dump was creating a Symbol in C_heap. There's an assert there that jdk jprt wasn't hitting because it was only done in product
Reviewed-by: dholmes, hseigel, iklam

duke@435	1	/*
brutisso@3456	2	* Copyright (c) 2002, 2012, Oracle and/or its affiliates. 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	*
trims@1907	19	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
trims@1907	20	* or visit www.oracle.com if you need additional information or have any
trims@1907	21	* questions.
duke@435	22	*
duke@435	23	*/
duke@435	24
stefank@2314	25	#ifndef SHARE_VM_GC_INTERFACE_GCCAUSE_HPP
stefank@2314	26	#define SHARE_VM_GC_INTERFACE_GCCAUSE_HPP
stefank@2314	27
stefank@2314	28	#include "memory/allocation.hpp"
stefank@2314	29
duke@435	30	//
duke@435	31	// This class exposes implementation details of the various
duke@435	32	// collector(s), and we need to be very careful with it. If
duke@435	33	// use of this class grows, we should split it into public
duke@435	34	// and implemenation-private "causes".
duke@435	35	//
duke@435	36
duke@435	37	class GCCause : public AllStatic {
duke@435	38	public:
duke@435	39	enum Cause {
duke@435	40	/* public */
duke@435	41	_java_lang_system_gc,
duke@435	42	_full_gc_alot,
duke@435	43	_scavenge_alot,
duke@435	44	_allocation_profiler,
duke@435	45	_jvmti_force_gc,
duke@435	46	_gc_locker,
duke@435	47	_heap_inspection,
duke@435	48	_heap_dump,
duke@435	49
duke@435	50	/* implementation independent, but reserved for GC use */
duke@435	51	_no_gc,
duke@435	52	_no_cause_specified,
duke@435	53	_allocation_failure,
duke@435	54
duke@435	55	/* implementation specific */
duke@435	56
duke@435	57	_tenured_generation_full,
coleenp@4037	58	_metadata_GC_threshold,
duke@435	59
duke@435	60	_cms_generation_full,
duke@435	61	_cms_initial_mark,
duke@435	62	_cms_final_remark,
duke@435	63
duke@435	64	_old_generation_expanded_on_last_scavenge,
duke@435	65	_old_generation_too_full_to_scavenge,
duke@435	66	_adaptive_size_policy,
duke@435	67
apetrusenko@1112	68	_g1_inc_collection_pause,
brutisso@3456	69	_g1_humongous_allocation,
ysr@777	70
duke@435	71	_last_ditch_collection,
duke@435	72	_last_gc_cause
duke@435	73	};
duke@435	74
duke@435	75	inline static bool is_user_requested_gc(GCCause::Cause cause) {
duke@435	76	return (cause == GCCause::_java_lang_system_gc ||
duke@435	77	cause == GCCause::_jvmti_force_gc);
duke@435	78	}
ysr@777	79
duke@435	80	inline static bool is_serviceability_requested_gc(GCCause::Cause
duke@435	81	cause) {
duke@435	82	return (cause == GCCause::_jvmti_force_gc ||
duke@435	83	cause == GCCause::_heap_inspection ||
duke@435	84	cause == GCCause::_heap_dump);
duke@435	85	}
ysr@777	86
duke@435	87	// Return a string describing the GCCause.
duke@435	88	static const char* to_string(GCCause::Cause cause);
duke@435	89	};
stefank@2314	90
brutisso@3767	91	// Helper class for doing logging that includes the GC Cause
brutisso@3767	92	// as a string.
brutisso@3767	93	class GCCauseString : StackObj {
brutisso@3767	94	private:
brutisso@3767	95	static const int _length = 128;
brutisso@3767	96	char _buffer[_length];
brutisso@3767	97	int _position;
brutisso@3767	98
brutisso@3767	99	public:
brutisso@3767	100	GCCauseString(const char* prefix, GCCause::Cause cause) {
brutisso@3767	101	if (PrintGCCause) {
jmasa@4391	102	_position = jio_snprintf(_buffer, _length, "%s (%s) ", prefix, GCCause::to_string(cause));
brutisso@3767	103	} else {
jmasa@4391	104	_position = jio_snprintf(_buffer, _length, "%s ", prefix);
brutisso@3767	105	}
brutisso@3767	106	assert(_position >= 0 && _position <= _length,
brutisso@3767	107	err_msg("Need to increase the buffer size in GCCauseString? %d", _position));
brutisso@3767	108	}
brutisso@3767	109
brutisso@3767	110	GCCauseString& append(const char* str) {
brutisso@3767	111	int res = jio_snprintf(_buffer + _position, _length - _position, "%s", str);
brutisso@3767	112	_position += res;
brutisso@3767	113	assert(res >= 0 && _position <= _length,
brutisso@3767	114	err_msg("Need to increase the buffer size in GCCauseString? %d", res));
brutisso@3767	115	return *this;
brutisso@3767	116	}
brutisso@3767	117
brutisso@3767	118	operator const char*() {
brutisso@3767	119	return _buffer;
brutisso@3767	120	}
brutisso@3767	121	};
brutisso@3767	122
stefank@2314	123	#endif // SHARE_VM_GC_INTERFACE_GCCAUSE_HPP