Mercurial > hg > graal-compiler
annotate src/share/vm/oops/oop.inline.hpp @ 20262:76b588255908
8035746: Add missing Klass::oop_is_instanceClassLoader() function
Reviewed-by: mgerdin, coleenp
author | stefank |
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date | Thu, 27 Feb 2014 10:36:50 +0100 |
parents | ce8f6bb717c9 |
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rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved. |
0 | 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 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #ifndef SHARE_VM_OOPS_OOP_INLINE_HPP |
26 #define SHARE_VM_OOPS_OOP_INLINE_HPP | |
27 | |
28 #include "gc_implementation/shared/ageTable.hpp" | |
29 #include "gc_implementation/shared/markSweep.inline.hpp" | |
30 #include "gc_interface/collectedHeap.inline.hpp" | |
31 #include "memory/barrierSet.inline.hpp" | |
32 #include "memory/cardTableModRefBS.hpp" | |
33 #include "memory/genCollectedHeap.hpp" | |
34 #include "memory/generation.hpp" | |
35 #include "memory/specialized_oop_closures.hpp" | |
36 #include "oops/arrayKlass.hpp" | |
37 #include "oops/arrayOop.hpp" | |
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38 #include "oops/klass.inline.hpp" |
1972 | 39 #include "oops/markOop.inline.hpp" |
40 #include "oops/oop.hpp" | |
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41 #include "runtime/atomic.inline.hpp" |
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42 #include "runtime/orderAccess.inline.hpp" |
1972 | 43 #include "runtime/os.hpp" |
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44 #include "utilities/macros.hpp" |
1972 | 45 #ifdef TARGET_ARCH_x86 |
46 # include "bytes_x86.hpp" | |
47 #endif | |
48 #ifdef TARGET_ARCH_sparc | |
49 # include "bytes_sparc.hpp" | |
50 #endif | |
51 #ifdef TARGET_ARCH_zero | |
52 # include "bytes_zero.hpp" | |
53 #endif | |
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54 #ifdef TARGET_ARCH_arm |
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55 # include "bytes_arm.hpp" |
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56 #endif |
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57 #ifdef TARGET_ARCH_ppc |
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58 # include "bytes_ppc.hpp" |
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59 #endif |
1972 | 60 |
0 | 61 // Implementation of all inlined member functions defined in oop.hpp |
62 // We need a separate file to avoid circular references | |
63 | |
64 inline void oopDesc::release_set_mark(markOop m) { | |
65 OrderAccess::release_store_ptr(&_mark, m); | |
66 } | |
67 | |
68 inline markOop oopDesc::cas_set_mark(markOop new_mark, markOop old_mark) { | |
69 return (markOop) Atomic::cmpxchg_ptr(new_mark, &_mark, old_mark); | |
70 } | |
71 | |
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72 inline Klass* oopDesc::klass() const { |
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73 if (UseCompressedClassPointers) { |
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74 return Klass::decode_klass_not_null(_metadata._compressed_klass); |
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75 } else { |
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76 return _metadata._klass; |
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77 } |
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78 } |
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79 |
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80 inline Klass* oopDesc::klass_or_null() const volatile { |
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81 // can be NULL in CMS |
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82 if (UseCompressedClassPointers) { |
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83 return Klass::decode_klass(_metadata._compressed_klass); |
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84 } else { |
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85 return _metadata._klass; |
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86 } |
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87 } |
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88 |
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89 inline int oopDesc::klass_gap_offset_in_bytes() { |
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90 assert(UseCompressedClassPointers, "only applicable to compressed klass pointers"); |
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91 return oopDesc::klass_offset_in_bytes() + sizeof(narrowKlass); |
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92 } |
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93 |
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94 inline Klass** oopDesc::klass_addr() { |
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95 // Only used internally and with CMS and will not work with |
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96 // UseCompressedOops |
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97 assert(!UseCompressedClassPointers, "only supported with uncompressed klass pointers"); |
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98 return (Klass**) &_metadata._klass; |
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99 } |
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100 |
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101 inline narrowKlass* oopDesc::compressed_klass_addr() { |
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102 assert(UseCompressedClassPointers, "only called by compressed klass pointers"); |
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103 return &_metadata._compressed_klass; |
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104 } |
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105 |
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106 inline void oopDesc::set_klass(Klass* k) { |
0 | 107 // since klasses are promoted no store check is needed |
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108 assert(Universe::is_bootstrapping() || k != NULL, "must be a real Klass*"); |
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109 assert(Universe::is_bootstrapping() || k->is_klass(), "not a Klass*"); |
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110 if (UseCompressedClassPointers) { |
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111 *compressed_klass_addr() = Klass::encode_klass_not_null(k); |
113
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112 } else { |
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113 *klass_addr() = k; |
113
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114 } |
0 | 115 } |
116 | |
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117 inline int oopDesc::klass_gap() const { |
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118 return *(int*)(((intptr_t)this) + klass_gap_offset_in_bytes()); |
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119 } |
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120 |
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121 inline void oopDesc::set_klass_gap(int v) { |
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122 if (UseCompressedClassPointers) { |
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123 *(int*)(((intptr_t)this) + klass_gap_offset_in_bytes()) = v; |
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124 } |
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125 } |
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126 |
0 | 127 inline void oopDesc::set_klass_to_list_ptr(oop k) { |
128 // This is only to be used during GC, for from-space objects, so no | |
129 // barrier is needed. | |
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130 if (UseCompressedClassPointers) { |
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131 _metadata._compressed_klass = (narrowKlass)encode_heap_oop(k); // may be null (parnew overflow handling) |
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132 } else { |
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133 _metadata._klass = (Klass*)(address)k; |
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134 } |
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135 } |
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136 |
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137 inline oop oopDesc::list_ptr_from_klass() { |
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138 // This is only to be used during GC, for from-space objects. |
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139 if (UseCompressedClassPointers) { |
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140 return decode_heap_oop((narrowOop)_metadata._compressed_klass); |
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141 } else { |
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142 // Special case for GC |
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143 return (oop)(address)_metadata._klass; |
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144 } |
0 | 145 } |
146 | |
147 inline void oopDesc::init_mark() { set_mark(markOopDesc::prototype_for_object(this)); } | |
148 | |
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149 inline bool oopDesc::is_a(Klass* k) const { return klass()->is_subtype_of(k); } |
0 | 150 |
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151 inline bool oopDesc::is_instance() const { return klass()->oop_is_instance(); } |
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152 inline bool oopDesc::is_instanceClassLoader() const { return klass()->oop_is_instanceClassLoader(); } |
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153 inline bool oopDesc::is_instanceMirror() const { return klass()->oop_is_instanceMirror(); } |
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154 inline bool oopDesc::is_instanceRef() const { return klass()->oop_is_instanceRef(); } |
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155 inline bool oopDesc::is_array() const { return klass()->oop_is_array(); } |
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156 inline bool oopDesc::is_objArray() const { return klass()->oop_is_objArray(); } |
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157 inline bool oopDesc::is_typeArray() const { return klass()->oop_is_typeArray(); } |
0 | 158 |
159 inline void* oopDesc::field_base(int offset) const { return (void*)&((char*)this)[offset]; } | |
160 | |
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161 template <class T> inline T* oopDesc::obj_field_addr(int offset) const { return (T*)field_base(offset); } |
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162 inline Metadata** oopDesc::metadata_field_addr(int offset) const { return (Metadata**)field_base(offset); } |
0 | 163 inline jbyte* oopDesc::byte_field_addr(int offset) const { return (jbyte*) field_base(offset); } |
164 inline jchar* oopDesc::char_field_addr(int offset) const { return (jchar*) field_base(offset); } | |
165 inline jboolean* oopDesc::bool_field_addr(int offset) const { return (jboolean*)field_base(offset); } | |
166 inline jint* oopDesc::int_field_addr(int offset) const { return (jint*) field_base(offset); } | |
167 inline jshort* oopDesc::short_field_addr(int offset) const { return (jshort*) field_base(offset); } | |
168 inline jlong* oopDesc::long_field_addr(int offset) const { return (jlong*) field_base(offset); } | |
169 inline jfloat* oopDesc::float_field_addr(int offset) const { return (jfloat*) field_base(offset); } | |
170 inline jdouble* oopDesc::double_field_addr(int offset) const { return (jdouble*) field_base(offset); } | |
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171 inline address* oopDesc::address_field_addr(int offset) const { return (address*) field_base(offset); } |
0 | 172 |
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173 |
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174 // Functions for getting and setting oops within instance objects. |
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175 // If the oops are compressed, the type passed to these overloaded functions |
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176 // is narrowOop. All functions are overloaded so they can be called by |
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177 // template functions without conditionals (the compiler instantiates via |
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178 // the right type and inlines the appopriate code). |
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179 |
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180 inline bool oopDesc::is_null(oop obj) { return obj == NULL; } |
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181 inline bool oopDesc::is_null(narrowOop obj) { return obj == 0; } |
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182 |
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183 // Algorithm for encoding and decoding oops from 64 bit pointers to 32 bit |
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184 // offset from the heap base. Saving the check for null can save instructions |
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185 // in inner GC loops so these are separated. |
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186 |
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187 inline bool check_obj_alignment(oop obj) { |
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188 return cast_from_oop<intptr_t>(obj) % MinObjAlignmentInBytes == 0; |
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189 } |
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190 |
113
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191 inline narrowOop oopDesc::encode_heap_oop_not_null(oop v) { |
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192 assert(!is_null(v), "oop value can never be zero"); |
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193 assert(check_obj_alignment(v), "Address not aligned"); |
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194 assert(Universe::heap()->is_in_reserved(v), "Address not in heap"); |
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195 address base = Universe::narrow_oop_base(); |
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196 int shift = Universe::narrow_oop_shift(); |
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197 uint64_t pd = (uint64_t)(pointer_delta((void*)v, (void*)base, 1)); |
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198 assert(OopEncodingHeapMax > pd, "change encoding max if new encoding"); |
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199 uint64_t result = pd >> shift; |
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200 assert((result & CONST64(0xffffffff00000000)) == 0, "narrow oop overflow"); |
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201 assert(decode_heap_oop(result) == v, "reversibility"); |
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202 return (narrowOop)result; |
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203 } |
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204 |
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205 inline narrowOop oopDesc::encode_heap_oop(oop v) { |
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206 return (is_null(v)) ? (narrowOop)0 : encode_heap_oop_not_null(v); |
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207 } |
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208 |
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209 inline oop oopDesc::decode_heap_oop_not_null(narrowOop v) { |
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210 assert(!is_null(v), "narrow oop value can never be zero"); |
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211 address base = Universe::narrow_oop_base(); |
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212 int shift = Universe::narrow_oop_shift(); |
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213 oop result = (oop)(void*)((uintptr_t)base + ((uintptr_t)v << shift)); |
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214 assert(check_obj_alignment(result), err_msg("address not aligned: " INTPTR_FORMAT, p2i((void*) result))); |
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215 return result; |
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216 } |
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217 |
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218 inline oop oopDesc::decode_heap_oop(narrowOop v) { |
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219 return is_null(v) ? (oop)NULL : decode_heap_oop_not_null(v); |
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220 } |
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221 |
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222 inline oop oopDesc::decode_heap_oop_not_null(oop v) { return v; } |
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223 inline oop oopDesc::decode_heap_oop(oop v) { return v; } |
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224 |
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225 // Load an oop out of the Java heap as is without decoding. |
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226 // Called by GC to check for null before decoding. |
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227 inline oop oopDesc::load_heap_oop(oop* p) { return *p; } |
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228 inline narrowOop oopDesc::load_heap_oop(narrowOop* p) { return *p; } |
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229 |
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230 // Load and decode an oop out of the Java heap into a wide oop. |
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231 inline oop oopDesc::load_decode_heap_oop_not_null(oop* p) { return *p; } |
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232 inline oop oopDesc::load_decode_heap_oop_not_null(narrowOop* p) { |
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233 return decode_heap_oop_not_null(*p); |
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234 } |
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235 |
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236 // Load and decode an oop out of the heap accepting null |
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237 inline oop oopDesc::load_decode_heap_oop(oop* p) { return *p; } |
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238 inline oop oopDesc::load_decode_heap_oop(narrowOop* p) { |
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239 return decode_heap_oop(*p); |
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240 } |
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241 |
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242 // Store already encoded heap oop into the heap. |
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243 inline void oopDesc::store_heap_oop(oop* p, oop v) { *p = v; } |
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244 inline void oopDesc::store_heap_oop(narrowOop* p, narrowOop v) { *p = v; } |
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245 |
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246 // Encode and store a heap oop. |
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247 inline void oopDesc::encode_store_heap_oop_not_null(narrowOop* p, oop v) { |
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248 *p = encode_heap_oop_not_null(v); |
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249 } |
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250 inline void oopDesc::encode_store_heap_oop_not_null(oop* p, oop v) { *p = v; } |
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251 |
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252 // Encode and store a heap oop allowing for null. |
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253 inline void oopDesc::encode_store_heap_oop(narrowOop* p, oop v) { |
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254 *p = encode_heap_oop(v); |
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255 } |
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256 inline void oopDesc::encode_store_heap_oop(oop* p, oop v) { *p = v; } |
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257 |
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258 // Store heap oop as is for volatile fields. |
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259 inline void oopDesc::release_store_heap_oop(volatile oop* p, oop v) { |
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260 OrderAccess::release_store_ptr(p, v); |
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261 } |
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262 inline void oopDesc::release_store_heap_oop(volatile narrowOop* p, |
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263 narrowOop v) { |
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264 OrderAccess::release_store(p, v); |
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265 } |
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266 |
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267 inline void oopDesc::release_encode_store_heap_oop_not_null( |
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268 volatile narrowOop* p, oop v) { |
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269 // heap oop is not pointer sized. |
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270 OrderAccess::release_store(p, encode_heap_oop_not_null(v)); |
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271 } |
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272 |
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273 inline void oopDesc::release_encode_store_heap_oop_not_null( |
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274 volatile oop* p, oop v) { |
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275 OrderAccess::release_store_ptr(p, v); |
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276 } |
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277 |
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278 inline void oopDesc::release_encode_store_heap_oop(volatile oop* p, |
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279 oop v) { |
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280 OrderAccess::release_store_ptr(p, v); |
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281 } |
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282 inline void oopDesc::release_encode_store_heap_oop( |
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283 volatile narrowOop* p, oop v) { |
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284 OrderAccess::release_store(p, encode_heap_oop(v)); |
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285 } |
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286 |
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287 |
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288 // These functions are only used to exchange oop fields in instances, |
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289 // not headers. |
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290 inline oop oopDesc::atomic_exchange_oop(oop exchange_value, volatile HeapWord *dest) { |
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291 if (UseCompressedOops) { |
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292 // encode exchange value from oop to T |
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293 narrowOop val = encode_heap_oop(exchange_value); |
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294 narrowOop old = (narrowOop)Atomic::xchg(val, (narrowOop*)dest); |
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295 // decode old from T to oop |
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296 return decode_heap_oop(old); |
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297 } else { |
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298 return (oop)Atomic::xchg_ptr(exchange_value, (oop*)dest); |
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299 } |
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300 } |
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301 |
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302 // In order to put or get a field out of an instance, must first check |
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303 // if the field has been compressed and uncompress it. |
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304 inline oop oopDesc::obj_field(int offset) const { |
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305 return UseCompressedOops ? |
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306 load_decode_heap_oop(obj_field_addr<narrowOop>(offset)) : |
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307 load_decode_heap_oop(obj_field_addr<oop>(offset)); |
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308 } |
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309 inline volatile oop oopDesc::obj_field_volatile(int offset) const { |
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310 volatile oop value = obj_field(offset); |
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311 OrderAccess::acquire(); |
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312 return value; |
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313 } |
113
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314 inline void oopDesc::obj_field_put(int offset, oop value) { |
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315 UseCompressedOops ? oop_store(obj_field_addr<narrowOop>(offset), value) : |
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316 oop_store(obj_field_addr<oop>(offset), value); |
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317 } |
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318 |
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319 inline Metadata* oopDesc::metadata_field(int offset) const { |
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320 return *metadata_field_addr(offset); |
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321 } |
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322 |
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323 inline void oopDesc::metadata_field_put(int offset, Metadata* value) { |
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324 *metadata_field_addr(offset) = value; |
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325 } |
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326 |
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327 inline void oopDesc::obj_field_put_raw(int offset, oop value) { |
113
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328 UseCompressedOops ? |
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329 encode_store_heap_oop(obj_field_addr<narrowOop>(offset), value) : |
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330 encode_store_heap_oop(obj_field_addr<oop>(offset), value); |
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331 } |
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332 inline void oopDesc::obj_field_put_volatile(int offset, oop value) { |
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333 OrderAccess::release(); |
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334 obj_field_put(offset, value); |
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335 OrderAccess::fence(); |
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336 } |
0 | 337 |
338 inline jbyte oopDesc::byte_field(int offset) const { return (jbyte) *byte_field_addr(offset); } | |
339 inline void oopDesc::byte_field_put(int offset, jbyte contents) { *byte_field_addr(offset) = (jint) contents; } | |
340 | |
341 inline jboolean oopDesc::bool_field(int offset) const { return (jboolean) *bool_field_addr(offset); } | |
342 inline void oopDesc::bool_field_put(int offset, jboolean contents) { *bool_field_addr(offset) = (jint) contents; } | |
343 | |
344 inline jchar oopDesc::char_field(int offset) const { return (jchar) *char_field_addr(offset); } | |
345 inline void oopDesc::char_field_put(int offset, jchar contents) { *char_field_addr(offset) = (jint) contents; } | |
346 | |
347 inline jint oopDesc::int_field(int offset) const { return *int_field_addr(offset); } | |
348 inline void oopDesc::int_field_put(int offset, jint contents) { *int_field_addr(offset) = contents; } | |
349 | |
350 inline jshort oopDesc::short_field(int offset) const { return (jshort) *short_field_addr(offset); } | |
351 inline void oopDesc::short_field_put(int offset, jshort contents) { *short_field_addr(offset) = (jint) contents;} | |
352 | |
353 inline jlong oopDesc::long_field(int offset) const { return *long_field_addr(offset); } | |
354 inline void oopDesc::long_field_put(int offset, jlong contents) { *long_field_addr(offset) = contents; } | |
355 | |
356 inline jfloat oopDesc::float_field(int offset) const { return *float_field_addr(offset); } | |
357 inline void oopDesc::float_field_put(int offset, jfloat contents) { *float_field_addr(offset) = contents; } | |
358 | |
359 inline jdouble oopDesc::double_field(int offset) const { return *double_field_addr(offset); } | |
360 inline void oopDesc::double_field_put(int offset, jdouble contents) { *double_field_addr(offset) = contents; } | |
361 | |
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362 inline address oopDesc::address_field(int offset) const { return *address_field_addr(offset); } |
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363 inline void oopDesc::address_field_put(int offset, address contents) { *address_field_addr(offset) = contents; } |
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364 |
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365 inline oop oopDesc::obj_field_acquire(int offset) const { |
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366 return UseCompressedOops ? |
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367 decode_heap_oop((narrowOop) |
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368 OrderAccess::load_acquire(obj_field_addr<narrowOop>(offset))) |
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369 : decode_heap_oop((oop) |
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370 OrderAccess::load_ptr_acquire(obj_field_addr<oop>(offset))); |
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371 } |
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372 inline void oopDesc::release_obj_field_put(int offset, oop value) { |
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373 UseCompressedOops ? |
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374 oop_store((volatile narrowOop*)obj_field_addr<narrowOop>(offset), value) : |
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375 oop_store((volatile oop*) obj_field_addr<oop>(offset), value); |
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376 } |
0 | 377 |
378 inline jbyte oopDesc::byte_field_acquire(int offset) const { return OrderAccess::load_acquire(byte_field_addr(offset)); } | |
379 inline void oopDesc::release_byte_field_put(int offset, jbyte contents) { OrderAccess::release_store(byte_field_addr(offset), contents); } | |
380 | |
381 inline jboolean oopDesc::bool_field_acquire(int offset) const { return OrderAccess::load_acquire(bool_field_addr(offset)); } | |
382 inline void oopDesc::release_bool_field_put(int offset, jboolean contents) { OrderAccess::release_store(bool_field_addr(offset), contents); } | |
383 | |
384 inline jchar oopDesc::char_field_acquire(int offset) const { return OrderAccess::load_acquire(char_field_addr(offset)); } | |
385 inline void oopDesc::release_char_field_put(int offset, jchar contents) { OrderAccess::release_store(char_field_addr(offset), contents); } | |
386 | |
387 inline jint oopDesc::int_field_acquire(int offset) const { return OrderAccess::load_acquire(int_field_addr(offset)); } | |
388 inline void oopDesc::release_int_field_put(int offset, jint contents) { OrderAccess::release_store(int_field_addr(offset), contents); } | |
389 | |
390 inline jshort oopDesc::short_field_acquire(int offset) const { return (jshort)OrderAccess::load_acquire(short_field_addr(offset)); } | |
391 inline void oopDesc::release_short_field_put(int offset, jshort contents) { OrderAccess::release_store(short_field_addr(offset), contents); } | |
392 | |
393 inline jlong oopDesc::long_field_acquire(int offset) const { return OrderAccess::load_acquire(long_field_addr(offset)); } | |
394 inline void oopDesc::release_long_field_put(int offset, jlong contents) { OrderAccess::release_store(long_field_addr(offset), contents); } | |
395 | |
396 inline jfloat oopDesc::float_field_acquire(int offset) const { return OrderAccess::load_acquire(float_field_addr(offset)); } | |
397 inline void oopDesc::release_float_field_put(int offset, jfloat contents) { OrderAccess::release_store(float_field_addr(offset), contents); } | |
398 | |
399 inline jdouble oopDesc::double_field_acquire(int offset) const { return OrderAccess::load_acquire(double_field_addr(offset)); } | |
400 inline void oopDesc::release_double_field_put(int offset, jdouble contents) { OrderAccess::release_store(double_field_addr(offset), contents); } | |
401 | |
710 | 402 inline address oopDesc::address_field_acquire(int offset) const { return (address) OrderAccess::load_ptr_acquire(address_field_addr(offset)); } |
403 inline void oopDesc::release_address_field_put(int offset, address contents) { OrderAccess::release_store_ptr(address_field_addr(offset), contents); } | |
404 | |
0 | 405 inline int oopDesc::size_given_klass(Klass* klass) { |
406 int lh = klass->layout_helper(); | |
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407 int s; |
0 | 408 |
409 // lh is now a value computed at class initialization that may hint | |
410 // at the size. For instances, this is positive and equal to the | |
411 // size. For arrays, this is negative and provides log2 of the | |
412 // array element size. For other oops, it is zero and thus requires | |
413 // a virtual call. | |
414 // | |
415 // We go to all this trouble because the size computation is at the | |
416 // heart of phase 2 of mark-compaction, and called for every object, | |
417 // alive or dead. So the speed here is equal in importance to the | |
418 // speed of allocation. | |
419 | |
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420 if (lh > Klass::_lh_neutral_value) { |
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421 if (!Klass::layout_helper_needs_slow_path(lh)) { |
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422 s = lh >> LogHeapWordSize; // deliver size scaled by wordSize |
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423 } else { |
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424 s = klass->oop_size(this); |
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425 } |
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426 } else if (lh <= Klass::_lh_neutral_value) { |
0 | 427 // The most common case is instances; fall through if so. |
428 if (lh < Klass::_lh_neutral_value) { | |
429 // Second most common case is arrays. We have to fetch the | |
430 // length of the array, shift (multiply) it appropriately, | |
431 // up to wordSize, add the header, and align to object size. | |
432 size_t size_in_bytes; | |
433 #ifdef _M_IA64 | |
434 // The Windows Itanium Aug 2002 SDK hoists this load above | |
435 // the check for s < 0. An oop at the end of the heap will | |
436 // cause an access violation if this load is performed on a non | |
437 // array oop. Making the reference volatile prohibits this. | |
438 // (%%% please explain by what magic the length is actually fetched!) | |
439 volatile int *array_length; | |
440 array_length = (volatile int *)( (intptr_t)this + | |
441 arrayOopDesc::length_offset_in_bytes() ); | |
442 assert(array_length > 0, "Integer arithmetic problem somewhere"); | |
443 // Put into size_t to avoid overflow. | |
444 size_in_bytes = (size_t) array_length; | |
445 size_in_bytes = size_in_bytes << Klass::layout_helper_log2_element_size(lh); | |
446 #else | |
447 size_t array_length = (size_t) ((arrayOop)this)->length(); | |
448 size_in_bytes = array_length << Klass::layout_helper_log2_element_size(lh); | |
449 #endif | |
450 size_in_bytes += Klass::layout_helper_header_size(lh); | |
451 | |
452 // This code could be simplified, but by keeping array_header_in_bytes | |
453 // in units of bytes and doing it this way we can round up just once, | |
454 // skipping the intermediate round to HeapWordSize. Cast the result | |
455 // of round_to to size_t to guarantee unsigned division == right shift. | |
456 s = (int)((size_t)round_to(size_in_bytes, MinObjAlignmentInBytes) / | |
457 HeapWordSize); | |
458 | |
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459 // UseParNewGC, UseParallelGC and UseG1GC can change the length field |
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460 // of an "old copy" of an object array in the young gen so it indicates |
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461 // the grey portion of an already copied array. This will cause the first |
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462 // disjunct below to fail if the two comparands are computed across such |
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463 // a concurrent change. |
0 | 464 // UseParNewGC also runs with promotion labs (which look like int |
465 // filler arrays) which are subject to changing their declared size | |
466 // when finally retiring a PLAB; this also can cause the first disjunct | |
467 // to fail for another worker thread that is concurrently walking the block | |
468 // offset table. Both these invariant failures are benign for their | |
469 // current uses; we relax the assertion checking to cover these two cases below: | |
470 // is_objArray() && is_forwarded() // covers first scenario above | |
471 // || is_typeArray() // covers second scenario above | |
472 // If and when UseParallelGC uses the same obj array oop stealing/chunking | |
342
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473 // technique, we will need to suitably modify the assertion. |
0 | 474 assert((s == klass->oop_size(this)) || |
342
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475 (Universe::heap()->is_gc_active() && |
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476 ((is_typeArray() && UseParNewGC) || |
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477 (is_objArray() && is_forwarded() && (UseParNewGC || UseParallelGC || UseG1GC)))), |
0 | 478 "wrong array object size"); |
479 } else { | |
480 // Must be zero, so bite the bullet and take the virtual call. | |
481 s = klass->oop_size(this); | |
482 } | |
483 } | |
484 | |
485 assert(s % MinObjAlignment == 0, "alignment check"); | |
486 assert(s > 0, "Bad size calculated"); | |
487 return s; | |
488 } | |
489 | |
490 | |
491 inline int oopDesc::size() { | |
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492 return size_given_klass(klass()); |
518
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493 } |
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494 |
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495 inline void update_barrier_set(void* p, oop v, bool release = false) { |
0 | 496 assert(oopDesc::bs() != NULL, "Uninitialized bs in oop!"); |
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497 oopDesc::bs()->write_ref_field(p, v, release); |
0 | 498 } |
499 | |
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500 template <class T> inline void update_barrier_set_pre(T* p, oop v) { |
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501 oopDesc::bs()->write_ref_field_pre(p, v); |
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502 } |
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503 |
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504 template <class T> inline void oop_store(T* p, oop v) { |
0 | 505 if (always_do_update_barrier) { |
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506 oop_store((volatile T*)p, v); |
0 | 507 } else { |
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508 update_barrier_set_pre(p, v); |
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509 oopDesc::encode_store_heap_oop(p, v); |
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510 // always_do_update_barrier == false => |
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511 // Either we are at a safepoint (in GC) or CMS is not used. In both |
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512 // cases it's unnecessary to mark the card as dirty with release sematics. |
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513 update_barrier_set((void*)p, v, false /* release */); // cast away type |
0 | 514 } |
515 } | |
516 | |
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517 template <class T> inline void oop_store(volatile T* p, oop v) { |
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518 update_barrier_set_pre((T*)p, v); // cast away volatile |
0 | 519 // Used by release_obj_field_put, so use release_store_ptr. |
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520 oopDesc::release_encode_store_heap_oop(p, v); |
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521 // When using CMS we must mark the card corresponding to p as dirty |
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522 // with release sematics to prevent that CMS sees the dirty card but |
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523 // not the new value v at p due to reordering of the two |
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524 // stores. Note that CMS has a concurrent precleaning phase, where |
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525 // it reads the card table while the Java threads are running. |
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526 update_barrier_set((void*)p, v, true /* release */); // cast away type |
0 | 527 } |
528 | |
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529 // Should replace *addr = oop assignments where addr type depends on UseCompressedOops |
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530 // (without having to remember the function name this calls). |
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531 inline void oop_store_raw(HeapWord* addr, oop value) { |
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532 if (UseCompressedOops) { |
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533 oopDesc::encode_store_heap_oop((narrowOop*)addr, value); |
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534 } else { |
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535 oopDesc::encode_store_heap_oop((oop*)addr, value); |
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536 } |
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537 } |
0 | 538 |
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539 inline oop oopDesc::atomic_compare_exchange_oop(oop exchange_value, |
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540 volatile HeapWord *dest, |
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541 oop compare_value, |
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542 bool prebarrier) { |
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543 if (UseCompressedOops) { |
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544 if (prebarrier) { |
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545 update_barrier_set_pre((narrowOop*)dest, exchange_value); |
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546 } |
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547 // encode exchange and compare value from oop to T |
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548 narrowOop val = encode_heap_oop(exchange_value); |
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549 narrowOop cmp = encode_heap_oop(compare_value); |
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550 |
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551 narrowOop old = (narrowOop) Atomic::cmpxchg(val, (narrowOop*)dest, cmp); |
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552 // decode old from T to oop |
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553 return decode_heap_oop(old); |
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554 } else { |
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555 if (prebarrier) { |
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556 update_barrier_set_pre((oop*)dest, exchange_value); |
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557 } |
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558 return (oop)Atomic::cmpxchg_ptr(exchange_value, (oop*)dest, compare_value); |
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559 } |
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560 } |
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561 |
0 | 562 // Used only for markSweep, scavenging |
563 inline bool oopDesc::is_gc_marked() const { | |
564 return mark()->is_marked(); | |
565 } | |
566 | |
567 inline bool oopDesc::is_locked() const { | |
568 return mark()->is_locked(); | |
569 } | |
570 | |
571 inline bool oopDesc::is_unlocked() const { | |
572 return mark()->is_unlocked(); | |
573 } | |
574 | |
575 inline bool oopDesc::has_bias_pattern() const { | |
576 return mark()->has_bias_pattern(); | |
577 } | |
578 | |
579 | |
580 // used only for asserts | |
581 inline bool oopDesc::is_oop(bool ignore_mark_word) const { | |
582 oop obj = (oop) this; | |
583 if (!check_obj_alignment(obj)) return false; | |
584 if (!Universe::heap()->is_in_reserved(obj)) return false; | |
585 // obj is aligned and accessible in heap | |
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586 if (Universe::heap()->is_in_reserved(obj->klass_or_null())) return false; |
0 | 587 |
588 // Header verification: the mark is typically non-NULL. If we're | |
589 // at a safepoint, it must not be null. | |
590 // Outside of a safepoint, the header could be changing (for example, | |
591 // another thread could be inflating a lock on this object). | |
592 if (ignore_mark_word) { | |
593 return true; | |
594 } | |
595 if (mark() != NULL) { | |
596 return true; | |
597 } | |
598 return !SafepointSynchronize::is_at_safepoint(); | |
599 } | |
600 | |
601 | |
602 // used only for asserts | |
603 inline bool oopDesc::is_oop_or_null(bool ignore_mark_word) const { | |
604 return this == NULL ? true : is_oop(ignore_mark_word); | |
605 } | |
606 | |
607 #ifndef PRODUCT | |
608 // used only for asserts | |
609 inline bool oopDesc::is_unlocked_oop() const { | |
610 if (!Universe::heap()->is_in_reserved(this)) return false; | |
611 return mark()->is_unlocked(); | |
612 } | |
613 #endif // PRODUCT | |
614 | |
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615 inline void oopDesc::follow_contents(void) { |
0 | 616 assert (is_gc_marked(), "should be marked"); |
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617 klass()->oop_follow_contents(this); |
0 | 618 } |
619 | |
620 // Used by scavengers | |
621 | |
622 inline bool oopDesc::is_forwarded() const { | |
623 // The extra heap check is needed since the obj might be locked, in which case the | |
624 // mark would point to a stack location and have the sentinel bit cleared | |
625 return mark()->is_marked(); | |
626 } | |
627 | |
628 // Used by scavengers | |
629 inline void oopDesc::forward_to(oop p) { | |
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630 assert(check_obj_alignment(p), |
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631 "forwarding to something not aligned"); |
0 | 632 assert(Universe::heap()->is_in_reserved(p), |
633 "forwarding to something not in heap"); | |
634 markOop m = markOopDesc::encode_pointer_as_mark(p); | |
635 assert(m->decode_pointer() == p, "encoding must be reversable"); | |
636 set_mark(m); | |
637 } | |
638 | |
639 // Used by parallel scavengers | |
640 inline bool oopDesc::cas_forward_to(oop p, markOop compare) { | |
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641 assert(check_obj_alignment(p), |
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642 "forwarding to something not aligned"); |
0 | 643 assert(Universe::heap()->is_in_reserved(p), |
644 "forwarding to something not in heap"); | |
645 markOop m = markOopDesc::encode_pointer_as_mark(p); | |
646 assert(m->decode_pointer() == p, "encoding must be reversable"); | |
647 return cas_set_mark(m, compare) == compare; | |
648 } | |
649 | |
650 // Note that the forwardee is not the same thing as the displaced_mark. | |
651 // The forwardee is used when copying during scavenge and mark-sweep. | |
652 // It does need to clear the low two locking- and GC-related bits. | |
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653 inline oop oopDesc::forwardee() const { |
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654 return (oop) mark()->decode_pointer(); |
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655 } |
0 | 656 |
657 inline bool oopDesc::has_displaced_mark() const { | |
658 return mark()->has_displaced_mark_helper(); | |
659 } | |
660 | |
661 inline markOop oopDesc::displaced_mark() const { | |
662 return mark()->displaced_mark_helper(); | |
663 } | |
664 | |
665 inline void oopDesc::set_displaced_mark(markOop m) { | |
666 mark()->set_displaced_mark_helper(m); | |
667 } | |
668 | |
669 // The following method needs to be MT safe. | |
6818 | 670 inline uint oopDesc::age() const { |
0 | 671 assert(!is_forwarded(), "Attempt to read age from forwarded mark"); |
672 if (has_displaced_mark()) { | |
673 return displaced_mark()->age(); | |
674 } else { | |
675 return mark()->age(); | |
676 } | |
677 } | |
678 | |
679 inline void oopDesc::incr_age() { | |
680 assert(!is_forwarded(), "Attempt to increment age of forwarded mark"); | |
681 if (has_displaced_mark()) { | |
682 set_displaced_mark(displaced_mark()->incr_age()); | |
683 } else { | |
684 set_mark(mark()->incr_age()); | |
685 } | |
686 } | |
687 | |
688 | |
689 inline intptr_t oopDesc::identity_hash() { | |
690 // Fast case; if the object is unlocked and the hash value is set, no locking is needed | |
691 // Note: The mark must be read into local variable to avoid concurrent updates. | |
692 markOop mrk = mark(); | |
693 if (mrk->is_unlocked() && !mrk->has_no_hash()) { | |
694 return mrk->hash(); | |
695 } else if (mrk->is_marked()) { | |
696 return mrk->hash(); | |
697 } else { | |
698 return slow_identity_hash(); | |
699 } | |
700 } | |
701 | |
702 inline int oopDesc::adjust_pointers() { | |
703 debug_only(int check_size = size()); | |
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704 int s = klass()->oop_adjust_pointers(this); |
0 | 705 assert(s == check_size, "should be the same"); |
706 return s; | |
707 } | |
708 | |
709 #define OOP_ITERATE_DEFN(OopClosureType, nv_suffix) \ | |
710 \ | |
711 inline int oopDesc::oop_iterate(OopClosureType* blk) { \ | |
712 SpecializationStats::record_call(); \ | |
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713 return klass()->oop_oop_iterate##nv_suffix(this, blk); \ |
0 | 714 } \ |
715 \ | |
716 inline int oopDesc::oop_iterate(OopClosureType* blk, MemRegion mr) { \ | |
717 SpecializationStats::record_call(); \ | |
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718 return klass()->oop_oop_iterate##nv_suffix##_m(this, blk, mr); \ |
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719 } |
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720 |
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721 |
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722 inline int oopDesc::oop_iterate_no_header(OopClosure* blk) { |
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723 // The NoHeaderExtendedOopClosure wraps the OopClosure and proxies all |
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724 // the do_oop calls, but turns off all other features in ExtendedOopClosure. |
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725 NoHeaderExtendedOopClosure cl(blk); |
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726 return oop_iterate(&cl); |
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727 } |
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728 |
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729 inline int oopDesc::oop_iterate_no_header(OopClosure* blk, MemRegion mr) { |
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730 NoHeaderExtendedOopClosure cl(blk); |
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731 return oop_iterate(&cl, mr); |
0 | 732 } |
733 | |
734 ALL_OOP_OOP_ITERATE_CLOSURES_1(OOP_ITERATE_DEFN) | |
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735 ALL_OOP_OOP_ITERATE_CLOSURES_2(OOP_ITERATE_DEFN) |
0 | 736 |
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737 #if INCLUDE_ALL_GCS |
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738 #define OOP_ITERATE_BACKWARDS_DEFN(OopClosureType, nv_suffix) \ |
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739 \ |
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740 inline int oopDesc::oop_iterate_backwards(OopClosureType* blk) { \ |
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741 SpecializationStats::record_call(); \ |
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742 return klass()->oop_oop_iterate_backwards##nv_suffix(this, blk); \ |
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743 } |
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744 |
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745 ALL_OOP_OOP_ITERATE_CLOSURES_1(OOP_ITERATE_BACKWARDS_DEFN) |
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746 ALL_OOP_OOP_ITERATE_CLOSURES_2(OOP_ITERATE_BACKWARDS_DEFN) |
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747 #endif // INCLUDE_ALL_GCS |
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1972 | 749 #endif // SHARE_VM_OOPS_OOP_INLINE_HPP |