1 /* 2 * Copyright (c) 1997, 2014, 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 */ 24 25 #include "precompiled.hpp" 26 #include "classfile/altHashing.hpp" 27 #include "classfile/javaClasses.inline.hpp" 28 #include "oops/oop.inline.hpp" 29 #include "runtime/handles.inline.hpp" 30 #include "runtime/thread.inline.hpp" 31 #include "utilities/copy.hpp" 32 33 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC 34 35 bool always_do_update_barrier = false; 36 37 BarrierSet* oopDesc::_bs = NULL; 38 39 void oopDesc::print_on(outputStream* st) const { 40 if (this == NULL) { 41 st->print_cr("NULL"); 42 } else { 43 klass()->oop_print_on(oop(this), st); 44 } 45 } 46 47 void oopDesc::print_address_on(outputStream* st) const { 48 if (PrintOopAddress) { 49 st->print("{"INTPTR_FORMAT"}", this); 50 } 51 } 52 53 void oopDesc::print() { print_on(tty); } 54 55 void oopDesc::print_address() { print_address_on(tty); } 56 57 char* oopDesc::print_string() { 58 stringStream st; 59 print_on(&st); 60 return st.as_string(); 61 } 62 63 void oopDesc::print_value() { 64 print_value_on(tty); 65 } 66 67 char* oopDesc::print_value_string() { 68 char buf[100]; 69 stringStream st(buf, sizeof(buf)); 70 print_value_on(&st); 71 return st.as_string(); 72 } 73 74 void oopDesc::print_value_on(outputStream* st) const { 75 oop obj = oop(this); 76 if (this == NULL) { 77 st->print("NULL"); 78 } else if (java_lang_String::is_instance(obj)) { 79 java_lang_String::print(obj, st); 80 if (PrintOopAddress) print_address_on(st); 81 } else { 82 klass()->oop_print_value_on(obj, st); 83 } 84 } 85 86 87 void oopDesc::verify_on(outputStream* st) { 88 if (this != NULL) { 89 klass()->oop_verify_on(this, st); 90 } 91 } 92 93 94 void oopDesc::verify() { 95 verify_on(tty); 96 } 97 98 intptr_t oopDesc::slow_identity_hash() { 99 // slow case; we have to acquire the micro lock in order to locate the header 100 ResetNoHandleMark rnm; // Might be called from LEAF/QUICK ENTRY 101 HandleMark hm; 102 Handle object(this); 103 return ObjectSynchronizer::identity_hash_value_for(object); 104 } 105 106 // When String table needs to rehash 107 unsigned int oopDesc::new_hash(juint seed) { 108 EXCEPTION_MARK; 109 ResourceMark rm; 110 int length; 111 jchar* chars = java_lang_String::as_unicode_string(this, length, THREAD); 112 if (chars != NULL) { 113 // Use alternate hashing algorithm on the string 114 return AltHashing::murmur3_32(seed, chars, length); 115 } else { 116 vm_exit_out_of_memory(length, OOM_MALLOC_ERROR, "unable to create Unicode strings for String table rehash"); 117 return 0; 118 } 119 } 120 121 VerifyOopClosure VerifyOopClosure::verify_oop; 122 123 void VerifyOopClosure::do_oop(oop* p) { VerifyOopClosure::do_oop_work(p); } 124 void VerifyOopClosure::do_oop(narrowOop* p) { VerifyOopClosure::do_oop_work(p); } 125 126 // type test operations that doesn't require inclusion of oop.inline.hpp. 127 bool oopDesc::is_instance_noinline() const { return is_instance(); } 128 bool oopDesc::is_instanceMirror_noinline() const { return is_instanceMirror(); } 129 bool oopDesc::is_instanceClassLoader_noline() const { return is_instanceClassLoader(); } 130 bool oopDesc::is_instanceRef_noline() const { return is_instanceRef(); } 131 bool oopDesc::is_array_noinline() const { return is_array(); } 132 bool oopDesc::is_objArray_noinline() const { return is_objArray(); } 133 bool oopDesc::is_typeArray_noinline() const { return is_typeArray(); } 134 135 bool oopDesc::has_klass_gap() { 136 // Only has a klass gap when compressed class pointers are used. 137 return UseCompressedClassPointers; 138 }