Mercurial > hg > graal-compiler
annotate src/share/vm/oops/oop.inline.hpp @ 8124:5fc51c1ecdeb
Merge.
| author | Thomas Wuerthinger <thomas.wuerthinger@oracle.com> |
|---|---|
| date | Tue, 05 Mar 2013 23:44:54 +0100 |
| parents | e522a00b91aa 3c9bc17b9403 |
| children | 58fc8e2b7b6d |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 1997, 2013, 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" | |
| 38 #include "oops/klass.hpp" | |
| 39 #include "oops/markOop.inline.hpp" | |
| 40 #include "oops/oop.hpp" | |
| 41 #include "runtime/atomic.hpp" | |
| 42 #include "runtime/os.hpp" | |
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43 #include "utilities/macros.hpp" |
| 1972 | 44 #ifdef TARGET_ARCH_x86 |
| 45 # include "bytes_x86.hpp" | |
| 46 #endif | |
| 47 #ifdef TARGET_ARCH_sparc | |
| 48 # include "bytes_sparc.hpp" | |
| 49 #endif | |
| 50 #ifdef TARGET_ARCH_zero | |
| 51 # include "bytes_zero.hpp" | |
| 52 #endif | |
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53 #ifdef TARGET_ARCH_arm |
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54 # include "bytes_arm.hpp" |
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55 #endif |
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56 #ifdef TARGET_ARCH_ppc |
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57 # include "bytes_ppc.hpp" |
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58 #endif |
| 1972 | 59 |
| 0 | 60 // Implementation of all inlined member functions defined in oop.hpp |
| 61 // We need a separate file to avoid circular references | |
| 62 | |
| 63 inline void oopDesc::release_set_mark(markOop m) { | |
| 64 OrderAccess::release_store_ptr(&_mark, m); | |
| 65 } | |
| 66 | |
| 67 inline markOop oopDesc::cas_set_mark(markOop new_mark, markOop old_mark) { | |
| 68 return (markOop) Atomic::cmpxchg_ptr(new_mark, &_mark, old_mark); | |
| 69 } | |
| 70 | |
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71 inline Klass* oopDesc::klass() const { |
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72 if (UseCompressedKlassPointers) { |
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73 return decode_klass_not_null(_metadata._compressed_klass); |
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74 } else { |
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75 return _metadata._klass; |
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76 } |
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77 } |
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78 |
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79 inline Klass* oopDesc::klass_or_null() const volatile { |
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80 // can be NULL in CMS |
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81 if (UseCompressedKlassPointers) { |
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82 return decode_klass(_metadata._compressed_klass); |
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83 } else { |
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84 return _metadata._klass; |
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85 } |
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86 } |
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87 |
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88 inline int oopDesc::klass_gap_offset_in_bytes() { |
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89 assert(UseCompressedKlassPointers, "only applicable to compressed klass pointers"); |
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90 return oopDesc::klass_offset_in_bytes() + sizeof(narrowOop); |
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91 } |
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92 |
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93 inline Klass** oopDesc::klass_addr() { |
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94 // Only used internally and with CMS and will not work with |
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95 // UseCompressedOops |
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96 assert(!UseCompressedKlassPointers, "only supported with uncompressed klass pointers"); |
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97 return (Klass**) &_metadata._klass; |
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98 } |
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99 |
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100 inline narrowOop* oopDesc::compressed_klass_addr() { |
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101 assert(UseCompressedKlassPointers, "only called by compressed klass pointers"); |
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102 return (narrowOop*) &_metadata._compressed_klass; |
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103 } |
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104 |
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105 inline void oopDesc::set_klass(Klass* k) { |
| 0 | 106 // since klasses are promoted no store check is needed |
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107 assert(Universe::is_bootstrapping() || k != NULL, "must be a real Klass*"); |
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108 assert(Universe::is_bootstrapping() || k->is_klass(), "not a Klass*"); |
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109 if (UseCompressedKlassPointers) { |
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110 *compressed_klass_addr() = encode_klass_not_null(k); |
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111 } else { |
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112 *klass_addr() = k; |
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113 } |
| 0 | 114 } |
| 115 | |
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116 inline int oopDesc::klass_gap() const { |
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117 return *(int*)(((intptr_t)this) + klass_gap_offset_in_bytes()); |
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118 } |
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119 |
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120 inline void oopDesc::set_klass_gap(int v) { |
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121 if (UseCompressedKlassPointers) { |
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122 *(int*)(((intptr_t)this) + klass_gap_offset_in_bytes()) = v; |
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123 } |
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124 } |
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125 |
| 0 | 126 inline void oopDesc::set_klass_to_list_ptr(oop k) { |
| 127 // This is only to be used during GC, for from-space objects, so no | |
| 128 // barrier is needed. | |
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129 if (UseCompressedKlassPointers) { |
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130 _metadata._compressed_klass = encode_heap_oop(k); // may be null (parnew overflow handling) |
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131 } else { |
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132 _metadata._klass = (Klass*)(address)k; |
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133 } |
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134 } |
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135 |
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136 inline oop oopDesc::list_ptr_from_klass() { |
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137 // This is only to be used during GC, for from-space objects. |
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138 if (UseCompressedKlassPointers) { |
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139 return decode_heap_oop(_metadata._compressed_klass); |
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140 } else { |
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141 // Special case for GC |
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142 return (oop)(address)_metadata._klass; |
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143 } |
| 0 | 144 } |
| 145 | |
| 146 inline void oopDesc::init_mark() { set_mark(markOopDesc::prototype_for_object(this)); } | |
| 147 | |
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148 inline bool oopDesc::is_a(Klass* k) const { return klass()->is_subtype_of(k); } |
| 0 | 149 |
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150 inline bool oopDesc::is_instance() const { return klass()->oop_is_instance(); } |
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151 inline bool oopDesc::is_instanceMirror() const { return klass()->oop_is_instanceMirror(); } |
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152 inline bool oopDesc::is_instanceRef() const { return klass()->oop_is_instanceRef(); } |
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153 inline bool oopDesc::is_array() const { return klass()->oop_is_array(); } |
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154 inline bool oopDesc::is_objArray() const { return klass()->oop_is_objArray(); } |
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155 inline bool oopDesc::is_typeArray() const { return klass()->oop_is_typeArray(); } |
| 0 | 156 |
| 157 inline void* oopDesc::field_base(int offset) const { return (void*)&((char*)this)[offset]; } | |
| 158 | |
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159 template <class T> inline T* oopDesc::obj_field_addr(int offset) const { return (T*)field_base(offset); } |
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160 inline Metadata** oopDesc::metadata_field_addr(int offset) const { return (Metadata**)field_base(offset); } |
| 0 | 161 inline jbyte* oopDesc::byte_field_addr(int offset) const { return (jbyte*) field_base(offset); } |
| 162 inline jchar* oopDesc::char_field_addr(int offset) const { return (jchar*) field_base(offset); } | |
| 163 inline jboolean* oopDesc::bool_field_addr(int offset) const { return (jboolean*)field_base(offset); } | |
| 164 inline jint* oopDesc::int_field_addr(int offset) const { return (jint*) field_base(offset); } | |
| 165 inline jshort* oopDesc::short_field_addr(int offset) const { return (jshort*) field_base(offset); } | |
| 166 inline jlong* oopDesc::long_field_addr(int offset) const { return (jlong*) field_base(offset); } | |
| 167 inline jfloat* oopDesc::float_field_addr(int offset) const { return (jfloat*) field_base(offset); } | |
| 168 inline jdouble* oopDesc::double_field_addr(int offset) const { return (jdouble*) field_base(offset); } | |
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169 inline address* oopDesc::address_field_addr(int offset) const { return (address*) field_base(offset); } |
| 0 | 170 |
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171 |
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172 // Functions for getting and setting oops within instance objects. |
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173 // If the oops are compressed, the type passed to these overloaded functions |
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174 // is narrowOop. All functions are overloaded so they can be called by |
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175 // template functions without conditionals (the compiler instantiates via |
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176 // the right type and inlines the appopriate code). |
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177 |
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178 inline bool oopDesc::is_null(oop obj) { return obj == NULL; } |
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179 inline bool oopDesc::is_null(Klass* obj) { return obj == NULL; } |
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180 inline bool oopDesc::is_null(narrowOop obj) { return obj == 0; } |
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181 |
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182 // Algorithm for encoding and decoding oops from 64 bit pointers to 32 bit |
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183 // offset from the heap base. Saving the check for null can save instructions |
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184 // in inner GC loops so these are separated. |
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185 |
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186 inline bool check_obj_alignment(oop obj) { |
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187 return (intptr_t)obj % MinObjAlignmentInBytes == 0; |
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188 } |
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189 inline bool check_klass_alignment(Klass* obj) { |
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190 return (intptr_t)obj % KlassAlignmentInBytes == 0; |
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191 } |
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192 |
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193 inline narrowOop oopDesc::encode_heap_oop_not_null(oop v) { |
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194 assert(!is_null(v), "oop value can never be zero"); |
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195 assert(check_obj_alignment(v), "Address not aligned"); |
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196 assert(Universe::heap()->is_in_reserved(v), "Address not in heap"); |
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197 address base = Universe::narrow_oop_base(); |
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198 int shift = Universe::narrow_oop_shift(); |
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199 uint64_t pd = (uint64_t)(pointer_delta((void*)v, (void*)base, 1)); |
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200 assert(OopEncodingHeapMax > pd, "change encoding max if new encoding"); |
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201 uint64_t result = pd >> shift; |
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202 assert((result & CONST64(0xffffffff00000000)) == 0, "narrow oop overflow"); |
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203 assert(decode_heap_oop(result) == v, "reversibility"); |
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204 return (narrowOop)result; |
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205 } |
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206 |
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207 inline narrowOop oopDesc::encode_heap_oop(oop v) { |
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208 return (is_null(v)) ? (narrowOop)0 : encode_heap_oop_not_null(v); |
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209 } |
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210 |
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211 inline oop oopDesc::decode_heap_oop_not_null(narrowOop v) { |
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212 assert(!is_null(v), "narrow oop value can never be zero"); |
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213 address base = Universe::narrow_oop_base(); |
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214 int shift = Universe::narrow_oop_shift(); |
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215 oop result = (oop)(void*)((uintptr_t)base + ((uintptr_t)v << shift)); |
| 1846 | 216 assert(check_obj_alignment(result), err_msg("address not aligned: " PTR_FORMAT, (void*) result)); |
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217 return result; |
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218 } |
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219 |
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220 inline oop oopDesc::decode_heap_oop(narrowOop v) { |
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221 return is_null(v) ? (oop)NULL : decode_heap_oop_not_null(v); |
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222 } |
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223 |
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224 inline oop oopDesc::decode_heap_oop_not_null(oop v) { return v; } |
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225 inline oop oopDesc::decode_heap_oop(oop v) { return v; } |
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226 |
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227 // Encoding and decoding for klass field. It is copied code, but someday |
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228 // might not be the same as oop. |
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229 |
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230 inline narrowOop oopDesc::encode_klass_not_null(Klass* v) { |
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231 assert(!is_null(v), "klass value can never be zero"); |
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232 assert(check_klass_alignment(v), "Address not aligned"); |
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233 address base = Universe::narrow_klass_base(); |
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234 int shift = Universe::narrow_klass_shift(); |
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235 uint64_t pd = (uint64_t)(pointer_delta((void*)v, (void*)base, 1)); |
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236 assert(KlassEncodingMetaspaceMax > pd, "change encoding max if new encoding"); |
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237 uint64_t result = pd >> shift; |
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238 assert((result & CONST64(0xffffffff00000000)) == 0, "narrow klass pointer overflow"); |
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239 assert(decode_klass(result) == v, "reversibility"); |
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240 return (narrowOop)result; |
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241 } |
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242 |
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243 inline narrowOop oopDesc::encode_klass(Klass* v) { |
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244 return (is_null(v)) ? (narrowOop)0 : encode_klass_not_null(v); |
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245 } |
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246 |
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247 inline Klass* oopDesc::decode_klass_not_null(narrowOop v) { |
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248 assert(!is_null(v), "narrow oop value can never be zero"); |
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249 address base = Universe::narrow_klass_base(); |
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250 int shift = Universe::narrow_klass_shift(); |
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251 Klass* result = (Klass*)(void*)((uintptr_t)base + ((uintptr_t)v << shift)); |
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252 assert(check_klass_alignment(result), err_msg("address not aligned: " PTR_FORMAT, (void*) result)); |
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253 return result; |
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254 } |
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255 |
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256 inline Klass* oopDesc::decode_klass(narrowOop v) { |
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257 return is_null(v) ? (Klass*)NULL : decode_klass_not_null(v); |
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258 } |
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259 |
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260 // Load an oop out of the Java heap as is without decoding. |
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261 // Called by GC to check for null before decoding. |
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262 inline oop oopDesc::load_heap_oop(oop* p) { return *p; } |
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263 inline narrowOop oopDesc::load_heap_oop(narrowOop* p) { return *p; } |
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264 |
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265 // Load and decode an oop out of the Java heap into a wide oop. |
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266 inline oop oopDesc::load_decode_heap_oop_not_null(oop* p) { return *p; } |
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267 inline oop oopDesc::load_decode_heap_oop_not_null(narrowOop* p) { |
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268 return decode_heap_oop_not_null(*p); |
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269 } |
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270 |
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271 // Load and decode an oop out of the heap accepting null |
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272 inline oop oopDesc::load_decode_heap_oop(oop* p) { return *p; } |
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273 inline oop oopDesc::load_decode_heap_oop(narrowOop* p) { |
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274 return decode_heap_oop(*p); |
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275 } |
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276 |
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277 // Store already encoded heap oop into the heap. |
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278 inline void oopDesc::store_heap_oop(oop* p, oop v) { *p = v; } |
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279 inline void oopDesc::store_heap_oop(narrowOop* p, narrowOop v) { *p = v; } |
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280 |
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281 // Encode and store a heap oop. |
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282 inline void oopDesc::encode_store_heap_oop_not_null(narrowOop* p, oop v) { |
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283 *p = encode_heap_oop_not_null(v); |
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284 } |
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285 inline void oopDesc::encode_store_heap_oop_not_null(oop* p, oop v) { *p = v; } |
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286 |
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287 // Encode and store a heap oop allowing for null. |
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288 inline void oopDesc::encode_store_heap_oop(narrowOop* p, oop v) { |
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289 *p = encode_heap_oop(v); |
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290 } |
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291 inline void oopDesc::encode_store_heap_oop(oop* p, oop v) { *p = v; } |
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292 |
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293 // Store heap oop as is for volatile fields. |
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294 inline void oopDesc::release_store_heap_oop(volatile oop* p, oop v) { |
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295 OrderAccess::release_store_ptr(p, v); |
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296 } |
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297 inline void oopDesc::release_store_heap_oop(volatile narrowOop* p, |
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298 narrowOop v) { |
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299 OrderAccess::release_store(p, v); |
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300 } |
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301 |
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302 inline void oopDesc::release_encode_store_heap_oop_not_null( |
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303 volatile narrowOop* p, oop v) { |
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304 // heap oop is not pointer sized. |
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305 OrderAccess::release_store(p, encode_heap_oop_not_null(v)); |
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306 } |
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307 |
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308 inline void oopDesc::release_encode_store_heap_oop_not_null( |
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309 volatile oop* p, oop v) { |
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310 OrderAccess::release_store_ptr(p, v); |
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311 } |
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312 |
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313 inline void oopDesc::release_encode_store_heap_oop(volatile oop* p, |
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314 oop v) { |
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315 OrderAccess::release_store_ptr(p, v); |
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316 } |
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317 inline void oopDesc::release_encode_store_heap_oop( |
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318 volatile narrowOop* p, oop v) { |
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319 OrderAccess::release_store(p, encode_heap_oop(v)); |
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320 } |
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321 |
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322 |
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323 // These functions are only used to exchange oop fields in instances, |
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324 // not headers. |
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325 inline oop oopDesc::atomic_exchange_oop(oop exchange_value, volatile HeapWord *dest) { |
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326 if (UseCompressedOops) { |
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327 // encode exchange value from oop to T |
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328 narrowOop val = encode_heap_oop(exchange_value); |
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329 narrowOop old = (narrowOop)Atomic::xchg(val, (narrowOop*)dest); |
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330 // decode old from T to oop |
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331 return decode_heap_oop(old); |
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332 } else { |
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333 return (oop)Atomic::xchg_ptr(exchange_value, (oop*)dest); |
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334 } |
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335 } |
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336 |
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337 // In order to put or get a field out of an instance, must first check |
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338 // if the field has been compressed and uncompress it. |
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339 inline oop oopDesc::obj_field(int offset) const { |
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340 return UseCompressedOops ? |
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341 load_decode_heap_oop(obj_field_addr<narrowOop>(offset)) : |
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342 load_decode_heap_oop(obj_field_addr<oop>(offset)); |
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343 } |
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344 inline volatile oop oopDesc::obj_field_volatile(int offset) const { |
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345 volatile oop value = obj_field(offset); |
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346 OrderAccess::acquire(); |
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347 return value; |
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348 } |
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349 inline void oopDesc::obj_field_put(int offset, oop value) { |
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350 UseCompressedOops ? oop_store(obj_field_addr<narrowOop>(offset), value) : |
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351 oop_store(obj_field_addr<oop>(offset), value); |
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352 } |
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353 |
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354 inline Metadata* oopDesc::metadata_field(int offset) const { |
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355 return *metadata_field_addr(offset); |
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356 } |
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357 |
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358 inline void oopDesc::metadata_field_put(int offset, Metadata* value) { |
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359 *metadata_field_addr(offset) = value; |
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360 } |
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361 |
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362 inline void oopDesc::obj_field_put_raw(int offset, oop value) { |
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363 UseCompressedOops ? |
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364 encode_store_heap_oop(obj_field_addr<narrowOop>(offset), value) : |
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365 encode_store_heap_oop(obj_field_addr<oop>(offset), value); |
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366 } |
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367 inline void oopDesc::obj_field_put_volatile(int offset, oop value) { |
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368 OrderAccess::release(); |
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369 obj_field_put(offset, value); |
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370 OrderAccess::fence(); |
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371 } |
| 0 | 372 |
| 373 inline jbyte oopDesc::byte_field(int offset) const { return (jbyte) *byte_field_addr(offset); } | |
| 374 inline void oopDesc::byte_field_put(int offset, jbyte contents) { *byte_field_addr(offset) = (jint) contents; } | |
| 375 | |
| 376 inline jboolean oopDesc::bool_field(int offset) const { return (jboolean) *bool_field_addr(offset); } | |
| 377 inline void oopDesc::bool_field_put(int offset, jboolean contents) { *bool_field_addr(offset) = (jint) contents; } | |
| 378 | |
| 379 inline jchar oopDesc::char_field(int offset) const { return (jchar) *char_field_addr(offset); } | |
| 380 inline void oopDesc::char_field_put(int offset, jchar contents) { *char_field_addr(offset) = (jint) contents; } | |
| 381 | |
| 382 inline jint oopDesc::int_field(int offset) const { return *int_field_addr(offset); } | |
| 383 inline void oopDesc::int_field_put(int offset, jint contents) { *int_field_addr(offset) = contents; } | |
| 384 | |
| 385 inline jshort oopDesc::short_field(int offset) const { return (jshort) *short_field_addr(offset); } | |
| 386 inline void oopDesc::short_field_put(int offset, jshort contents) { *short_field_addr(offset) = (jint) contents;} | |
| 387 | |
| 388 inline jlong oopDesc::long_field(int offset) const { return *long_field_addr(offset); } | |
| 389 inline void oopDesc::long_field_put(int offset, jlong contents) { *long_field_addr(offset) = contents; } | |
| 390 | |
| 391 inline jfloat oopDesc::float_field(int offset) const { return *float_field_addr(offset); } | |
| 392 inline void oopDesc::float_field_put(int offset, jfloat contents) { *float_field_addr(offset) = contents; } | |
| 393 | |
| 394 inline jdouble oopDesc::double_field(int offset) const { return *double_field_addr(offset); } | |
| 395 inline void oopDesc::double_field_put(int offset, jdouble contents) { *double_field_addr(offset) = contents; } | |
| 396 | |
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397 inline address oopDesc::address_field(int offset) const { return *address_field_addr(offset); } |
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398 inline void oopDesc::address_field_put(int offset, address contents) { *address_field_addr(offset) = contents; } |
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399 |
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400 inline oop oopDesc::obj_field_acquire(int offset) const { |
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401 return UseCompressedOops ? |
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402 decode_heap_oop((narrowOop) |
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403 OrderAccess::load_acquire(obj_field_addr<narrowOop>(offset))) |
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404 : decode_heap_oop((oop) |
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405 OrderAccess::load_ptr_acquire(obj_field_addr<oop>(offset))); |
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406 } |
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407 inline void oopDesc::release_obj_field_put(int offset, oop value) { |
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408 UseCompressedOops ? |
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409 oop_store((volatile narrowOop*)obj_field_addr<narrowOop>(offset), value) : |
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410 oop_store((volatile oop*) obj_field_addr<oop>(offset), value); |
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411 } |
| 0 | 412 |
| 413 inline jbyte oopDesc::byte_field_acquire(int offset) const { return OrderAccess::load_acquire(byte_field_addr(offset)); } | |
| 414 inline void oopDesc::release_byte_field_put(int offset, jbyte contents) { OrderAccess::release_store(byte_field_addr(offset), contents); } | |
| 415 | |
| 416 inline jboolean oopDesc::bool_field_acquire(int offset) const { return OrderAccess::load_acquire(bool_field_addr(offset)); } | |
| 417 inline void oopDesc::release_bool_field_put(int offset, jboolean contents) { OrderAccess::release_store(bool_field_addr(offset), contents); } | |
| 418 | |
| 419 inline jchar oopDesc::char_field_acquire(int offset) const { return OrderAccess::load_acquire(char_field_addr(offset)); } | |
| 420 inline void oopDesc::release_char_field_put(int offset, jchar contents) { OrderAccess::release_store(char_field_addr(offset), contents); } | |
| 421 | |
| 422 inline jint oopDesc::int_field_acquire(int offset) const { return OrderAccess::load_acquire(int_field_addr(offset)); } | |
| 423 inline void oopDesc::release_int_field_put(int offset, jint contents) { OrderAccess::release_store(int_field_addr(offset), contents); } | |
| 424 | |
| 425 inline jshort oopDesc::short_field_acquire(int offset) const { return (jshort)OrderAccess::load_acquire(short_field_addr(offset)); } | |
| 426 inline void oopDesc::release_short_field_put(int offset, jshort contents) { OrderAccess::release_store(short_field_addr(offset), contents); } | |
| 427 | |
| 428 inline jlong oopDesc::long_field_acquire(int offset) const { return OrderAccess::load_acquire(long_field_addr(offset)); } | |
| 429 inline void oopDesc::release_long_field_put(int offset, jlong contents) { OrderAccess::release_store(long_field_addr(offset), contents); } | |
| 430 | |
| 431 inline jfloat oopDesc::float_field_acquire(int offset) const { return OrderAccess::load_acquire(float_field_addr(offset)); } | |
| 432 inline void oopDesc::release_float_field_put(int offset, jfloat contents) { OrderAccess::release_store(float_field_addr(offset), contents); } | |
| 433 | |
| 434 inline jdouble oopDesc::double_field_acquire(int offset) const { return OrderAccess::load_acquire(double_field_addr(offset)); } | |
| 435 inline void oopDesc::release_double_field_put(int offset, jdouble contents) { OrderAccess::release_store(double_field_addr(offset), contents); } | |
| 436 | |
| 710 | 437 inline address oopDesc::address_field_acquire(int offset) const { return (address) OrderAccess::load_ptr_acquire(address_field_addr(offset)); } |
| 438 inline void oopDesc::release_address_field_put(int offset, address contents) { OrderAccess::release_store_ptr(address_field_addr(offset), contents); } | |
| 439 | |
| 0 | 440 inline int oopDesc::size_given_klass(Klass* klass) { |
| 441 int lh = klass->layout_helper(); | |
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442 int s; |
| 0 | 443 |
| 444 // lh is now a value computed at class initialization that may hint | |
| 445 // at the size. For instances, this is positive and equal to the | |
| 446 // size. For arrays, this is negative and provides log2 of the | |
| 447 // array element size. For other oops, it is zero and thus requires | |
| 448 // a virtual call. | |
| 449 // | |
| 450 // We go to all this trouble because the size computation is at the | |
| 451 // heart of phase 2 of mark-compaction, and called for every object, | |
| 452 // alive or dead. So the speed here is equal in importance to the | |
| 453 // speed of allocation. | |
| 454 | |
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455 if (lh > Klass::_lh_neutral_value) { |
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456 if (!Klass::layout_helper_needs_slow_path(lh)) { |
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457 s = lh >> LogHeapWordSize; // deliver size scaled by wordSize |
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458 } else { |
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459 s = klass->oop_size(this); |
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460 } |
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461 } else if (lh <= Klass::_lh_neutral_value) { |
| 0 | 462 // The most common case is instances; fall through if so. |
| 463 if (lh < Klass::_lh_neutral_value) { | |
| 464 // Second most common case is arrays. We have to fetch the | |
| 465 // length of the array, shift (multiply) it appropriately, | |
| 466 // up to wordSize, add the header, and align to object size. | |
| 467 size_t size_in_bytes; | |
| 468 #ifdef _M_IA64 | |
| 469 // The Windows Itanium Aug 2002 SDK hoists this load above | |
| 470 // the check for s < 0. An oop at the end of the heap will | |
| 471 // cause an access violation if this load is performed on a non | |
| 472 // array oop. Making the reference volatile prohibits this. | |
| 473 // (%%% please explain by what magic the length is actually fetched!) | |
| 474 volatile int *array_length; | |
| 475 array_length = (volatile int *)( (intptr_t)this + | |
| 476 arrayOopDesc::length_offset_in_bytes() ); | |
| 477 assert(array_length > 0, "Integer arithmetic problem somewhere"); | |
| 478 // Put into size_t to avoid overflow. | |
| 479 size_in_bytes = (size_t) array_length; | |
| 480 size_in_bytes = size_in_bytes << Klass::layout_helper_log2_element_size(lh); | |
| 481 #else | |
| 482 size_t array_length = (size_t) ((arrayOop)this)->length(); | |
| 483 size_in_bytes = array_length << Klass::layout_helper_log2_element_size(lh); | |
| 484 #endif | |
| 485 size_in_bytes += Klass::layout_helper_header_size(lh); | |
| 486 | |
| 487 // This code could be simplified, but by keeping array_header_in_bytes | |
| 488 // in units of bytes and doing it this way we can round up just once, | |
| 489 // skipping the intermediate round to HeapWordSize. Cast the result | |
| 490 // of round_to to size_t to guarantee unsigned division == right shift. | |
| 491 s = (int)((size_t)round_to(size_in_bytes, MinObjAlignmentInBytes) / | |
| 492 HeapWordSize); | |
| 493 | |
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494 // UseParNewGC, UseParallelGC and UseG1GC can change the length field |
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495 // of an "old copy" of an object array in the young gen so it indicates |
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496 // the grey portion of an already copied array. This will cause the first |
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497 // disjunct below to fail if the two comparands are computed across such |
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498 // a concurrent change. |
| 0 | 499 // UseParNewGC also runs with promotion labs (which look like int |
| 500 // filler arrays) which are subject to changing their declared size | |
| 501 // when finally retiring a PLAB; this also can cause the first disjunct | |
| 502 // to fail for another worker thread that is concurrently walking the block | |
| 503 // offset table. Both these invariant failures are benign for their | |
| 504 // current uses; we relax the assertion checking to cover these two cases below: | |
| 505 // is_objArray() && is_forwarded() // covers first scenario above | |
| 506 // || is_typeArray() // covers second scenario above | |
| 507 // If and when UseParallelGC uses the same obj array oop stealing/chunking | |
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508 // technique, we will need to suitably modify the assertion. |
| 0 | 509 assert((s == klass->oop_size(this)) || |
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510 (Universe::heap()->is_gc_active() && |
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511 ((is_typeArray() && UseParNewGC) || |
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512 (is_objArray() && is_forwarded() && (UseParNewGC || UseParallelGC || UseG1GC)))), |
| 0 | 513 "wrong array object size"); |
| 514 } else { | |
| 515 // Must be zero, so bite the bullet and take the virtual call. | |
| 516 s = klass->oop_size(this); | |
| 517 } | |
| 518 } | |
| 519 | |
| 520 assert(s % MinObjAlignment == 0, "alignment check"); | |
| 521 assert(s > 0, "Bad size calculated"); | |
| 522 return s; | |
| 523 } | |
| 524 | |
| 525 | |
| 526 inline int oopDesc::size() { | |
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527 return size_given_klass(klass()); |
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528 } |
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529 |
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530 inline void update_barrier_set(void* p, oop v) { |
| 0 | 531 assert(oopDesc::bs() != NULL, "Uninitialized bs in oop!"); |
| 532 oopDesc::bs()->write_ref_field(p, v); | |
| 533 } | |
| 534 | |
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535 template <class T> inline void update_barrier_set_pre(T* p, oop v) { |
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536 oopDesc::bs()->write_ref_field_pre(p, v); |
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537 } |
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538 |
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539 template <class T> inline void oop_store(T* p, oop v) { |
| 0 | 540 if (always_do_update_barrier) { |
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541 oop_store((volatile T*)p, v); |
| 0 | 542 } else { |
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543 update_barrier_set_pre(p, v); |
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544 oopDesc::encode_store_heap_oop(p, v); |
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545 update_barrier_set((void*)p, v); // cast away type |
| 0 | 546 } |
| 547 } | |
| 548 | |
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549 template <class T> inline void oop_store(volatile T* p, oop v) { |
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550 update_barrier_set_pre((T*)p, v); // cast away volatile |
| 0 | 551 // Used by release_obj_field_put, so use release_store_ptr. |
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552 oopDesc::release_encode_store_heap_oop(p, v); |
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553 update_barrier_set((void*)p, v); // cast away type |
| 0 | 554 } |
| 555 | |
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556 // Should replace *addr = oop assignments where addr type depends on UseCompressedOops |
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557 // (without having to remember the function name this calls). |
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558 inline void oop_store_raw(HeapWord* addr, oop value) { |
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559 if (UseCompressedOops) { |
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560 oopDesc::encode_store_heap_oop((narrowOop*)addr, value); |
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561 } else { |
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562 oopDesc::encode_store_heap_oop((oop*)addr, value); |
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563 } |
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564 } |
| 0 | 565 |
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566 inline oop oopDesc::atomic_compare_exchange_oop(oop exchange_value, |
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567 volatile HeapWord *dest, |
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568 oop compare_value, |
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569 bool prebarrier) { |
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570 if (UseCompressedOops) { |
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571 if (prebarrier) { |
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572 update_barrier_set_pre((narrowOop*)dest, exchange_value); |
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573 } |
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574 // encode exchange and compare value from oop to T |
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575 narrowOop val = encode_heap_oop(exchange_value); |
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576 narrowOop cmp = encode_heap_oop(compare_value); |
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577 |
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578 narrowOop old = (narrowOop) Atomic::cmpxchg(val, (narrowOop*)dest, cmp); |
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579 // decode old from T to oop |
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580 return decode_heap_oop(old); |
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581 } else { |
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582 if (prebarrier) { |
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583 update_barrier_set_pre((oop*)dest, exchange_value); |
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584 } |
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585 return (oop)Atomic::cmpxchg_ptr(exchange_value, (oop*)dest, compare_value); |
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586 } |
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587 } |
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588 |
| 0 | 589 // Used only for markSweep, scavenging |
| 590 inline bool oopDesc::is_gc_marked() const { | |
| 591 return mark()->is_marked(); | |
| 592 } | |
| 593 | |
| 594 inline bool oopDesc::is_locked() const { | |
| 595 return mark()->is_locked(); | |
| 596 } | |
| 597 | |
| 598 inline bool oopDesc::is_unlocked() const { | |
| 599 return mark()->is_unlocked(); | |
| 600 } | |
| 601 | |
| 602 inline bool oopDesc::has_bias_pattern() const { | |
| 603 return mark()->has_bias_pattern(); | |
| 604 } | |
| 605 | |
| 606 | |
| 607 // used only for asserts | |
| 608 inline bool oopDesc::is_oop(bool ignore_mark_word) const { | |
| 609 oop obj = (oop) this; | |
| 610 if (!check_obj_alignment(obj)) return false; | |
| 611 if (!Universe::heap()->is_in_reserved(obj)) return false; | |
| 612 // obj is aligned and accessible in heap | |
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613 if (Universe::heap()->is_in_reserved(obj->klass_or_null())) return false; |
| 0 | 614 |
| 615 // Header verification: the mark is typically non-NULL. If we're | |
| 616 // at a safepoint, it must not be null. | |
| 617 // Outside of a safepoint, the header could be changing (for example, | |
| 618 // another thread could be inflating a lock on this object). | |
| 619 if (ignore_mark_word) { | |
| 620 return true; | |
| 621 } | |
| 622 if (mark() != NULL) { | |
| 623 return true; | |
| 624 } | |
| 625 return !SafepointSynchronize::is_at_safepoint(); | |
| 626 } | |
| 627 | |
| 628 | |
| 629 // used only for asserts | |
| 630 inline bool oopDesc::is_oop_or_null(bool ignore_mark_word) const { | |
| 631 return this == NULL ? true : is_oop(ignore_mark_word); | |
| 632 } | |
| 633 | |
| 634 #ifndef PRODUCT | |
| 635 // used only for asserts | |
| 636 inline bool oopDesc::is_unlocked_oop() const { | |
| 637 if (!Universe::heap()->is_in_reserved(this)) return false; | |
| 638 return mark()->is_unlocked(); | |
| 639 } | |
| 640 #endif // PRODUCT | |
| 641 | |
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642 inline void oopDesc::follow_contents(void) { |
| 0 | 643 assert (is_gc_marked(), "should be marked"); |
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644 klass()->oop_follow_contents(this); |
| 0 | 645 } |
| 646 | |
| 647 // Used by scavengers | |
| 648 | |
| 649 inline bool oopDesc::is_forwarded() const { | |
| 650 // The extra heap check is needed since the obj might be locked, in which case the | |
| 651 // mark would point to a stack location and have the sentinel bit cleared | |
| 652 return mark()->is_marked(); | |
| 653 } | |
| 654 | |
| 655 // Used by scavengers | |
| 656 inline void oopDesc::forward_to(oop p) { | |
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657 assert(check_obj_alignment(p), |
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658 "forwarding to something not aligned"); |
| 0 | 659 assert(Universe::heap()->is_in_reserved(p), |
| 660 "forwarding to something not in heap"); | |
| 661 markOop m = markOopDesc::encode_pointer_as_mark(p); | |
| 662 assert(m->decode_pointer() == p, "encoding must be reversable"); | |
| 663 set_mark(m); | |
| 664 } | |
| 665 | |
| 666 // Used by parallel scavengers | |
| 667 inline bool oopDesc::cas_forward_to(oop p, markOop compare) { | |
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668 assert(check_obj_alignment(p), |
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669 "forwarding to something not aligned"); |
| 0 | 670 assert(Universe::heap()->is_in_reserved(p), |
| 671 "forwarding to something not in heap"); | |
| 672 markOop m = markOopDesc::encode_pointer_as_mark(p); | |
| 673 assert(m->decode_pointer() == p, "encoding must be reversable"); | |
| 674 return cas_set_mark(m, compare) == compare; | |
| 675 } | |
| 676 | |
| 677 // Note that the forwardee is not the same thing as the displaced_mark. | |
| 678 // The forwardee is used when copying during scavenge and mark-sweep. | |
| 679 // It does need to clear the low two locking- and GC-related bits. | |
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680 inline oop oopDesc::forwardee() const { |
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681 return (oop) mark()->decode_pointer(); |
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682 } |
| 0 | 683 |
| 684 inline bool oopDesc::has_displaced_mark() const { | |
| 685 return mark()->has_displaced_mark_helper(); | |
| 686 } | |
| 687 | |
| 688 inline markOop oopDesc::displaced_mark() const { | |
| 689 return mark()->displaced_mark_helper(); | |
| 690 } | |
| 691 | |
| 692 inline void oopDesc::set_displaced_mark(markOop m) { | |
| 693 mark()->set_displaced_mark_helper(m); | |
| 694 } | |
| 695 | |
| 696 // The following method needs to be MT safe. | |
| 6818 | 697 inline uint oopDesc::age() const { |
| 0 | 698 assert(!is_forwarded(), "Attempt to read age from forwarded mark"); |
| 699 if (has_displaced_mark()) { | |
| 700 return displaced_mark()->age(); | |
| 701 } else { | |
| 702 return mark()->age(); | |
| 703 } | |
| 704 } | |
| 705 | |
| 706 inline void oopDesc::incr_age() { | |
| 707 assert(!is_forwarded(), "Attempt to increment age of forwarded mark"); | |
| 708 if (has_displaced_mark()) { | |
| 709 set_displaced_mark(displaced_mark()->incr_age()); | |
| 710 } else { | |
| 711 set_mark(mark()->incr_age()); | |
| 712 } | |
| 713 } | |
| 714 | |
| 715 | |
| 716 inline intptr_t oopDesc::identity_hash() { | |
| 717 // Fast case; if the object is unlocked and the hash value is set, no locking is needed | |
| 718 // Note: The mark must be read into local variable to avoid concurrent updates. | |
| 719 markOop mrk = mark(); | |
| 720 if (mrk->is_unlocked() && !mrk->has_no_hash()) { | |
| 721 return mrk->hash(); | |
| 722 } else if (mrk->is_marked()) { | |
| 723 return mrk->hash(); | |
| 724 } else { | |
| 725 return slow_identity_hash(); | |
| 726 } | |
| 727 } | |
| 728 | |
| 729 inline int oopDesc::adjust_pointers() { | |
| 730 debug_only(int check_size = size()); | |
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731 int s = klass()->oop_adjust_pointers(this); |
| 0 | 732 assert(s == check_size, "should be the same"); |
| 733 return s; | |
| 734 } | |
| 735 | |
| 736 #define OOP_ITERATE_DEFN(OopClosureType, nv_suffix) \ | |
| 737 \ | |
| 738 inline int oopDesc::oop_iterate(OopClosureType* blk) { \ | |
| 739 SpecializationStats::record_call(); \ | |
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740 return klass()->oop_oop_iterate##nv_suffix(this, blk); \ |
| 0 | 741 } \ |
| 742 \ | |
| 743 inline int oopDesc::oop_iterate(OopClosureType* blk, MemRegion mr) { \ | |
| 744 SpecializationStats::record_call(); \ | |
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745 return klass()->oop_oop_iterate##nv_suffix##_m(this, blk, mr); \ |
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746 } |
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747 |
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748 |
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749 inline int oopDesc::oop_iterate_no_header(OopClosure* blk) { |
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750 // The NoHeaderExtendedOopClosure wraps the OopClosure and proxies all |
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751 // the do_oop calls, but turns off all other features in ExtendedOopClosure. |
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752 NoHeaderExtendedOopClosure cl(blk); |
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753 return oop_iterate(&cl); |
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754 } |
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755 |
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756 inline int oopDesc::oop_iterate_no_header(OopClosure* blk, MemRegion mr) { |
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757 NoHeaderExtendedOopClosure cl(blk); |
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758 return oop_iterate(&cl, mr); |
| 0 | 759 } |
| 760 | |
| 761 ALL_OOP_OOP_ITERATE_CLOSURES_1(OOP_ITERATE_DEFN) | |
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762 ALL_OOP_OOP_ITERATE_CLOSURES_2(OOP_ITERATE_DEFN) |
| 0 | 763 |
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764 #if INCLUDE_ALL_GCS |
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765 #define OOP_ITERATE_BACKWARDS_DEFN(OopClosureType, nv_suffix) \ |
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766 \ |
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767 inline int oopDesc::oop_iterate_backwards(OopClosureType* blk) { \ |
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768 SpecializationStats::record_call(); \ |
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769 return klass()->oop_oop_iterate_backwards##nv_suffix(this, blk); \ |
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770 } |
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771 |
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772 ALL_OOP_OOP_ITERATE_CLOSURES_1(OOP_ITERATE_BACKWARDS_DEFN) |
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773 ALL_OOP_OOP_ITERATE_CLOSURES_2(OOP_ITERATE_BACKWARDS_DEFN) |
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774 #endif // INCLUDE_ALL_GCS |
| 0 | 775 |
| 1972 | 776 #endif // SHARE_VM_OOPS_OOP_INLINE_HPP |