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src/share/vm/oops/oop.cpp@624a0741915c (annotated)

src/share/vm/oops/oop.cpp

Thu, 04 Apr 2019 17:56:29 +0800

author

aoqi

date

Thu, 04 Apr 2019 17:56:29 +0800

changeset 9572

624a0741915c

parent 9448

73d689add964

child 10015

eb7ce841ccec

permissions

-rw-r--r--

Merge

aoqi@0	1	/*
aoqi@0	2	* Copyright (c) 1997, 2014, 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	#include "precompiled.hpp"
aoqi@0	26	#include "classfile/altHashing.hpp"
aoqi@0	27	#include "classfile/javaClasses.hpp"
aoqi@0	28	#include "oops/oop.inline.hpp"
aoqi@0	29	#include "runtime/handles.inline.hpp"
aoqi@0	30	#include "runtime/thread.inline.hpp"
aoqi@0	31	#include "utilities/copy.hpp"
aoqi@0	32
aoqi@0	33	PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC
aoqi@0	34
aoqi@0	35	bool always_do_update_barrier = false;
aoqi@0	36
aoqi@0	37	BarrierSet* oopDesc::_bs = NULL;
aoqi@0	38
aoqi@0	39	void oopDesc::print_on(outputStream* st) const {
aoqi@0	40	if (this == NULL) {
aoqi@0	41	st->print_cr("NULL");
aoqi@0	42	} else {
aoqi@0	43	klass()->oop_print_on(oop(this), st);
aoqi@0	44	}
aoqi@0	45	}
aoqi@0	46
aoqi@0	47	void oopDesc::print_address_on(outputStream* st) const {
aoqi@0	48	if (PrintOopAddress) {
kevinw@9327	49	st->print("{" INTPTR_FORMAT "}", this);
aoqi@0	50	}
aoqi@0	51	}
aoqi@0	52
aoqi@0	53	void oopDesc::print() { print_on(tty); }
aoqi@0	54
aoqi@0	55	void oopDesc::print_address() { print_address_on(tty); }
aoqi@0	56
aoqi@0	57	char* oopDesc::print_string() {
aoqi@0	58	stringStream st;
aoqi@0	59	print_on(&st);
aoqi@0	60	return st.as_string();
aoqi@0	61	}
aoqi@0	62
aoqi@0	63	void oopDesc::print_value() {
aoqi@0	64	print_value_on(tty);
aoqi@0	65	}
aoqi@0	66
aoqi@0	67	char* oopDesc::print_value_string() {
aoqi@0	68	char buf[100];
aoqi@0	69	stringStream st(buf, sizeof(buf));
aoqi@0	70	print_value_on(&st);
aoqi@0	71	return st.as_string();
aoqi@0	72	}
aoqi@0	73
aoqi@0	74	void oopDesc::print_value_on(outputStream* st) const {
aoqi@0	75	oop obj = oop(this);
aoqi@0	76	if (this == NULL) {
aoqi@0	77	st->print("NULL");
aoqi@0	78	} else if (java_lang_String::is_instance(obj)) {
aoqi@0	79	java_lang_String::print(obj, st);
aoqi@0	80	if (PrintOopAddress) print_address_on(st);
aoqi@0	81	} else {
aoqi@0	82	klass()->oop_print_value_on(obj, st);
aoqi@0	83	}
aoqi@0	84	}
aoqi@0	85
aoqi@0	86
aoqi@0	87	void oopDesc::verify_on(outputStream* st) {
aoqi@0	88	if (this != NULL) {
aoqi@0	89	klass()->oop_verify_on(this, st);
aoqi@0	90	}
aoqi@0	91	}
aoqi@0	92
aoqi@0	93
aoqi@0	94	void oopDesc::verify() {
aoqi@0	95	verify_on(tty);
aoqi@0	96	}
aoqi@0	97
aoqi@0	98	intptr_t oopDesc::slow_identity_hash() {
aoqi@0	99	// slow case; we have to acquire the micro lock in order to locate the header
aoqi@0	100	ResetNoHandleMark rnm; // Might be called from LEAF/QUICK ENTRY
aoqi@0	101	HandleMark hm;
aoqi@0	102	Handle object(this);
aoqi@0	103	return ObjectSynchronizer::identity_hash_value_for(object);
aoqi@0	104	}
aoqi@0	105
aoqi@0	106	// When String table needs to rehash
aoqi@0	107	unsigned int oopDesc::new_hash(juint seed) {
aoqi@0	108	EXCEPTION_MARK;
aoqi@0	109	ResourceMark rm;
aoqi@0	110	int length;
aoqi@0	111	jchar* chars = java_lang_String::as_unicode_string(this, length, THREAD);
aoqi@0	112	if (chars != NULL) {
aoqi@0	113	// Use alternate hashing algorithm on the string
aoqi@0	114	return AltHashing::murmur3_32(seed, chars, length);
aoqi@0	115	} else {
aoqi@0	116	vm_exit_out_of_memory(length, OOM_MALLOC_ERROR, "unable to create Unicode strings for String table rehash");
aoqi@0	117	return 0;
aoqi@0	118	}
aoqi@0	119	}
aoqi@0	120
aoqi@0	121	VerifyOopClosure VerifyOopClosure::verify_oop;
aoqi@0	122
aoqi@0	123	void VerifyOopClosure::do_oop(oop* p) { VerifyOopClosure::do_oop_work(p); }
aoqi@0	124	void VerifyOopClosure::do_oop(narrowOop* p) { VerifyOopClosure::do_oop_work(p); }