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src/share/vm/gc_interface/gcCause.hpp@eef07cd490d4 (annotated)

src/share/vm/gc_interface/gcCause.hpp

Wed, 03 Jul 2019 20:42:37 +0800

author

aoqi

date

Wed, 03 Jul 2019 20:42:37 +0800

changeset 9637

eef07cd490d4

parent 8604

04d83ba48607

permissions

-rw-r--r--

Merge

aoqi@0	1	/*
aoqi@0	2	* Copyright (c) 2002, 2013, Oracle and/or its affiliates. All rights reserved.
aoqi@0	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0	4	*
aoqi@0	5	* This code is free software; you can redistribute it and/or modify it
aoqi@0	6	* under the terms of the GNU General Public License version 2 only, as
aoqi@0	7	* published by the Free Software Foundation.
aoqi@0	8	*
aoqi@0	9	* This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
aoqi@0	12	* version 2 for more details (a copy is included in the LICENSE file that
aoqi@0	13	* accompanied this code).
aoqi@0	14	*
aoqi@0	15	* You should have received a copy of the GNU General Public License version
aoqi@0	16	* 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0	17	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0	18	*
aoqi@0	19	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0	20	* or visit www.oracle.com if you need additional information or have any
aoqi@0	21	* questions.
aoqi@0	22	*
aoqi@0	23	*/
aoqi@0	24
aoqi@0	25	#ifndef SHARE_VM_GC_INTERFACE_GCCAUSE_HPP
aoqi@0	26	#define SHARE_VM_GC_INTERFACE_GCCAUSE_HPP
aoqi@0	27
aoqi@0	28	#include "memory/allocation.hpp"
aoqi@0	29
aoqi@0	30	//
aoqi@0	31	// This class exposes implementation details of the various
aoqi@0	32	// collector(s), and we need to be very careful with it. If
aoqi@0	33	// use of this class grows, we should split it into public
aoqi@0	34	// and implemenation-private "causes".
aoqi@0	35	//
aoqi@0	36
aoqi@0	37	class GCCause : public AllStatic {
aoqi@0	38	public:
aoqi@0	39	enum Cause {
aoqi@0	40	/* public */
aoqi@0	41	_java_lang_system_gc,
aoqi@0	42	_full_gc_alot,
aoqi@0	43	_scavenge_alot,
aoqi@0	44	_allocation_profiler,
aoqi@0	45	_jvmti_force_gc,
aoqi@0	46	_gc_locker,
aoqi@0	47	_heap_inspection,
aoqi@0	48	_heap_dump,
tschatzl@7071	49	_wb_young_gc,
kevinw@8194	50	_wb_conc_mark,
sjohanss@7236	51	_update_allocation_context_stats_inc,
sjohanss@7236	52	_update_allocation_context_stats_full,
aoqi@0	53
aoqi@0	54	/* implementation independent, but reserved for GC use */
aoqi@0	55	_no_gc,
aoqi@0	56	_no_cause_specified,
aoqi@0	57	_allocation_failure,
aoqi@0	58
aoqi@0	59	/* implementation specific */
aoqi@0	60
aoqi@0	61	_tenured_generation_full,
aoqi@0	62	_metadata_GC_threshold,
aoqi@0	63
aoqi@0	64	_cms_generation_full,
aoqi@0	65	_cms_initial_mark,
aoqi@0	66	_cms_final_remark,
aoqi@0	67	_cms_concurrent_mark,
aoqi@0	68
aoqi@0	69	_old_generation_expanded_on_last_scavenge,
aoqi@0	70	_old_generation_too_full_to_scavenge,
aoqi@0	71	_adaptive_size_policy,
aoqi@0	72
aoqi@0	73	_g1_inc_collection_pause,
aoqi@0	74	_g1_humongous_allocation,
aoqi@0	75
aoqi@0	76	_last_ditch_collection,
aoqi@0	77	_last_gc_cause
aoqi@0	78	};
aoqi@0	79
aoqi@0	80	inline static bool is_user_requested_gc(GCCause::Cause cause) {
aoqi@0	81	return (cause == GCCause::_java_lang_system_gc ||
aoqi@0	82	cause == GCCause::_jvmti_force_gc);
aoqi@0	83	}
aoqi@0	84
aoqi@0	85	inline static bool is_serviceability_requested_gc(GCCause::Cause
aoqi@0	86	cause) {
aoqi@0	87	return (cause == GCCause::_jvmti_force_gc ||
aoqi@0	88	cause == GCCause::_heap_inspection ||
aoqi@0	89	cause == GCCause::_heap_dump);
aoqi@0	90	}
aoqi@0	91
aoqi@0	92	// Return a string describing the GCCause.
aoqi@0	93	static const char* to_string(GCCause::Cause cause);
aoqi@0	94	};
aoqi@0	95
aoqi@0	96	// Helper class for doing logging that includes the GC Cause
aoqi@0	97	// as a string.
aoqi@0	98	class GCCauseString : StackObj {
aoqi@0	99	private:
aoqi@0	100	static const int _length = 128;
aoqi@0	101	char _buffer[_length];
aoqi@0	102	int _position;
aoqi@0	103
aoqi@0	104	public:
aoqi@0	105	GCCauseString(const char* prefix, GCCause::Cause cause) {
aoqi@0	106	if (PrintGCCause) {
aoqi@0	107	_position = jio_snprintf(_buffer, _length, "%s (%s) ", prefix, GCCause::to_string(cause));
aoqi@0	108	} else {
aoqi@0	109	_position = jio_snprintf(_buffer, _length, "%s ", prefix);
aoqi@0	110	}
aoqi@0	111	assert(_position >= 0 && _position <= _length,
aoqi@0	112	err_msg("Need to increase the buffer size in GCCauseString? %d", _position));
aoqi@0	113	}
aoqi@0	114
aoqi@0	115	GCCauseString& append(const char* str) {
aoqi@0	116	int res = jio_snprintf(_buffer + _position, _length - _position, "%s", str);
aoqi@0	117	_position += res;
aoqi@0	118	assert(res >= 0 && _position <= _length,
aoqi@0	119	err_msg("Need to increase the buffer size in GCCauseString? %d", res));
aoqi@0	120	return *this;
aoqi@0	121	}
aoqi@0	122
aoqi@0	123	operator const char*() {
aoqi@0	124	return _buffer;
aoqi@0	125	}
aoqi@0	126	};
aoqi@0	127
aoqi@0	128	#endif // SHARE_VM_GC_INTERFACE_GCCAUSE_HPP