a90e842e0c
AltHashing used jint the way of juint in bit shifting which could lead loss of precision. Fix by change _seed defined as juint. Reviewed-by: coleenp, ccheung
123 lines
3.5 KiB
C++
123 lines
3.5 KiB
C++
/*
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* Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*
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*/
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#include "precompiled.hpp"
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#include "classfile/altHashing.hpp"
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#include "classfile/javaClasses.hpp"
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#include "oops/oop.inline.hpp"
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#include "runtime/handles.inline.hpp"
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#include "runtime/thread.inline.hpp"
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#include "utilities/copy.hpp"
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bool always_do_update_barrier = false;
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BarrierSet* oopDesc::_bs = NULL;
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void oopDesc::print_on(outputStream* st) const {
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if (this == NULL) {
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st->print_cr("NULL");
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} else {
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klass()->oop_print_on(oop(this), st);
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}
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}
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void oopDesc::print_address_on(outputStream* st) const {
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if (PrintOopAddress) {
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st->print("{"INTPTR_FORMAT"}", this);
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}
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}
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void oopDesc::print() { print_on(tty); }
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void oopDesc::print_address() { print_address_on(tty); }
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char* oopDesc::print_string() {
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stringStream st;
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print_on(&st);
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return st.as_string();
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}
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void oopDesc::print_value() {
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print_value_on(tty);
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}
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char* oopDesc::print_value_string() {
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char buf[100];
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stringStream st(buf, sizeof(buf));
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print_value_on(&st);
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return st.as_string();
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}
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void oopDesc::print_value_on(outputStream* st) const {
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oop obj = oop(this);
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if (this == NULL) {
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st->print("NULL");
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} else if (java_lang_String::is_instance(obj)) {
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java_lang_String::print(obj, st);
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if (PrintOopAddress) print_address_on(st);
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} else {
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klass()->oop_print_value_on(obj, st);
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}
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}
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void oopDesc::verify_on(outputStream* st) {
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if (this != NULL) {
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klass()->oop_verify_on(this, st);
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}
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}
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void oopDesc::verify() {
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verify_on(tty);
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}
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intptr_t oopDesc::slow_identity_hash() {
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// slow case; we have to acquire the micro lock in order to locate the header
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ResetNoHandleMark rnm; // Might be called from LEAF/QUICK ENTRY
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HandleMark hm;
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Handle object(this);
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return ObjectSynchronizer::identity_hash_value_for(object);
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}
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// When String table needs to rehash
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unsigned int oopDesc::new_hash(juint seed) {
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EXCEPTION_MARK;
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ResourceMark rm;
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int length;
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jchar* chars = java_lang_String::as_unicode_string(this, length, THREAD);
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if (chars != NULL) {
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// Use alternate hashing algorithm on the string
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return AltHashing::murmur3_32(seed, chars, length);
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} else {
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vm_exit_out_of_memory(length, OOM_MALLOC_ERROR, "unable to create Unicode strings for String table rehash");
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return 0;
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}
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}
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VerifyOopClosure VerifyOopClosure::verify_oop;
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void VerifyOopClosure::do_oop(oop* p) { VerifyOopClosure::do_oop_work(p); }
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void VerifyOopClosure::do_oop(narrowOop* p) { VerifyOopClosure::do_oop_work(p); }
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