jdk8-mips64-public/hotspot: src/share/vm/oops/oop.cpp@80e866b1d053

     1 /*

     2  * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

    14  *

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  *

    19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20  * or visit www.oracle.com if you need additional information or have any

    21  * questions.

    22  *

    23  */

    25 #include "precompiled.hpp"

    26 #include "classfile/altHashing.hpp"

    27 #include "classfile/javaClasses.hpp"

    28 #include "oops/oop.inline.hpp"

    29 #include "runtime/handles.inline.hpp"

    30 #include "utilities/copy.hpp"

    31 #ifdef TARGET_OS_FAMILY_linux

    32 # include "thread_linux.inline.hpp"

    33 #endif

    34 #ifdef TARGET_OS_FAMILY_solaris

    35 # include "thread_solaris.inline.hpp"

    36 #endif

    37 #ifdef TARGET_OS_FAMILY_windows

    38 # include "thread_windows.inline.hpp"

    39 #endif

    40 #ifdef TARGET_OS_FAMILY_bsd

    41 # include "thread_bsd.inline.hpp"

    42 #endif

    44 bool always_do_update_barrier = false;

    46 BarrierSet* oopDesc::_bs = NULL;

    48 void oopDesc::print_on(outputStream* st) const {

    49   if (this == NULL) {

    50     st->print_cr("NULL");

    51   } else {

    52     klass()->oop_print_on(oop(this), st);

    53   }

    54 }

    56 void oopDesc::print_address_on(outputStream* st) const {

    57   if (PrintOopAddress) {

    58     st->print("{"INTPTR_FORMAT"}", this);

    59   }

    60 }

    62 void oopDesc::print()         { print_on(tty);         }

    64 void oopDesc::print_address() { print_address_on(tty); }

    66 char* oopDesc::print_string() {

    67   stringStream st;

    68   print_on(&st);

    69   return st.as_string();

    70 }

    72 void oopDesc::print_value() {

    73   print_value_on(tty);

    74 }

    76 char* oopDesc::print_value_string() {

    77   char buf[100];

    78   stringStream st(buf, sizeof(buf));

    79   print_value_on(&st);

    80   return st.as_string();

    81 }

    83 void oopDesc::print_value_on(outputStream* st) const {

    84   oop obj = oop(this);

    85   if (this == NULL) {

    86     st->print("NULL");

    87   } else if (java_lang_String::is_instance(obj)) {

    88     java_lang_String::print(obj, st);

    89     if (PrintOopAddress) print_address_on(st);

    90   } else {

    91     klass()->oop_print_value_on(obj, st);

    92   }

    93 }

    96 void oopDesc::verify_on(outputStream* st) {

    97   if (this != NULL) {

    98     klass()->oop_verify_on(this, st);

    99   }

   100 }

   103 void oopDesc::verify() {

   104   verify_on(tty);

   105 }

   107 intptr_t oopDesc::slow_identity_hash() {

   108   // slow case; we have to acquire the micro lock in order to locate the header

   109   ResetNoHandleMark rnm; // Might be called from LEAF/QUICK ENTRY

   110   HandleMark hm;

   111   Handle object(this);

   112   return ObjectSynchronizer::identity_hash_value_for(object);

   113 }

   115 // When String table needs to rehash

   116 unsigned int oopDesc::new_hash(jint seed) {

   117   ResourceMark rm;

   118   int length;

   119   jchar* chars = java_lang_String::as_unicode_string(this, length);

   120   // Use alternate hashing algorithm on the string

   121   return AltHashing::murmur3_32(seed, chars, length);

   122 }

   124 VerifyOopClosure VerifyOopClosure::verify_oop;

   126 void VerifyOopClosure::do_oop(oop* p)       { VerifyOopClosure::do_oop_work(p); }

   127 void VerifyOopClosure::do_oop(narrowOop* p) { VerifyOopClosure::do_oop_work(p); }

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