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src/share/vm/oops/oop.cpp@da91efe96a93 (annotated)

src/share/vm/oops/oop.cpp

Sat, 01 Sep 2012 13:25:18 -0400

author

coleenp

date

Sat, 01 Sep 2012 13:25:18 -0400

changeset 4037

da91efe96a93

parent 3711

b632e80fc9dc

child 4299

f34d701e952e

permissions

-rw-r--r--

6964458: Reimplement class meta-data storage to use native memory
Summary: Remove PermGen, allocate meta-data in metaspace linked to class loaders, rewrite GC walking, rewrite and rename metadata to be C++ classes
Reviewed-by: jmasa, stefank, never, coleenp, kvn, brutisso, mgerdin, dholmes, jrose, twisti, roland
Contributed-by: jmasa <jon.masamitsu@oracle.com>, stefank <stefan.karlsson@oracle.com>, mgerdin <mikael.gerdin@oracle.com>, never <tom.rodriguez@oracle.com>

duke@435	1	/*
brutisso@3711	2	* Copyright (c) 1997, 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	#include "precompiled.hpp"
coleenp@4037	26	#include "classfile/altHashing.hpp"
stefank@2314	27	#include "classfile/javaClasses.hpp"
stefank@2314	28	#include "oops/oop.inline.hpp"
stefank@2314	29	#include "runtime/handles.inline.hpp"
stefank@2314	30	#include "utilities/copy.hpp"
stefank@2314	31	#ifdef TARGET_OS_FAMILY_linux
stefank@2314	32	# include "thread_linux.inline.hpp"
stefank@2314	33	#endif
stefank@2314	34	#ifdef TARGET_OS_FAMILY_solaris
stefank@2314	35	# include "thread_solaris.inline.hpp"
stefank@2314	36	#endif
stefank@2314	37	#ifdef TARGET_OS_FAMILY_windows
stefank@2314	38	# include "thread_windows.inline.hpp"
stefank@2314	39	#endif
never@3156	40	#ifdef TARGET_OS_FAMILY_bsd
never@3156	41	# include "thread_bsd.inline.hpp"
never@3156	42	#endif
duke@435	43
duke@435	44	bool always_do_update_barrier = false;
duke@435	45
duke@435	46	BarrierSet* oopDesc::_bs = NULL;
duke@435	47
duke@435	48	void oopDesc::print_on(outputStream* st) const {
duke@435	49	if (this == NULL) {
duke@435	50	st->print_cr("NULL");
duke@435	51	} else {
coleenp@4037	52	klass()->oop_print_on(oop(this), st);
duke@435	53	}
duke@435	54	}
duke@435	55
duke@435	56	void oopDesc::print_address_on(outputStream* st) const {
duke@435	57	if (PrintOopAddress) {
jrose@1100	58	st->print("{"INTPTR_FORMAT"}", this);
duke@435	59	}
duke@435	60	}
duke@435	61
duke@435	62	void oopDesc::print() { print_on(tty); }
duke@435	63
duke@435	64	void oopDesc::print_address() { print_address_on(tty); }
duke@435	65
duke@435	66	char* oopDesc::print_string() {
jrose@1590	67	stringStream st;
jrose@1590	68	print_on(&st);
jrose@1590	69	return st.as_string();
jrose@1590	70	}
jrose@1590	71
jrose@1590	72	void oopDesc::print_value() {
jrose@1590	73	print_value_on(tty);
duke@435	74	}
duke@435	75
duke@435	76	char* oopDesc::print_value_string() {
jrose@1590	77	char buf[100];
jrose@1590	78	stringStream st(buf, sizeof(buf));
jrose@1590	79	print_value_on(&st);
jrose@1590	80	return st.as_string();
duke@435	81	}
duke@435	82
jrose@1590	83	void oopDesc::print_value_on(outputStream* st) const {
jrose@1590	84	oop obj = oop(this);
jrose@1590	85	if (this == NULL) {
jrose@1590	86	st->print("NULL");
jrose@1590	87	} else if (java_lang_String::is_instance(obj)) {
jrose@1590	88	java_lang_String::print(obj, st);
jrose@1590	89	if (PrintOopAddress) print_address_on(st);
jrose@1590	90	} else {
coleenp@4037	91	klass()->oop_print_value_on(obj, st);
jrose@1590	92	}
jrose@1590	93	}
jrose@1590	94
duke@435	95
duke@435	96	void oopDesc::verify_on(outputStream* st) {
duke@435	97	if (this != NULL) {
coleenp@4037	98	klass()->oop_verify_on(this, st);
duke@435	99	}
duke@435	100	}
duke@435	101
duke@435	102
duke@435	103	void oopDesc::verify() {
duke@435	104	verify_on(tty);
duke@435	105	}
duke@435	106
duke@435	107	intptr_t oopDesc::slow_identity_hash() {
duke@435	108	// slow case; we have to acquire the micro lock in order to locate the header
duke@435	109	ResetNoHandleMark rnm; // Might be called from LEAF/QUICK ENTRY
duke@435	110	HandleMark hm;
coleenp@4037	111	Handle object(this);
duke@435	112	return ObjectSynchronizer::identity_hash_value_for(object);
duke@435	113	}
duke@435	114
coleenp@4037	115	// When String table needs to rehash
coleenp@4037	116	unsigned int oopDesc::new_hash(jint seed) {
coleenp@4037	117	ResourceMark rm;
coleenp@4037	118	int length;
coleenp@4037	119	jchar* chars = java_lang_String::as_unicode_string(this, length);
coleenp@4037	120	// Use alternate hashing algorithm on the string
coleenp@4037	121	return AltHashing::murmur3_32(seed, chars, length);
coleenp@4037	122	}
coleenp@4037	123
duke@435	124	VerifyOopClosure VerifyOopClosure::verify_oop;
coleenp@548	125
coleenp@548	126	void VerifyOopClosure::do_oop(oop* p) { VerifyOopClosure::do_oop_work(p); }
coleenp@548	127	void VerifyOopClosure::do_oop(narrowOop* p) { VerifyOopClosure::do_oop_work(p); }