Mercurial > hg > graal-jvmci-8
annotate src/share/vm/oops/objArrayKlass.cpp @ 845:df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
Summary: Modifications to G1 so as to allow the use of compressed oops.
Reviewed-by: apetrusenko, coleenp, jmasa, kvn, never, phh, tonyp
author | ysr |
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date | Tue, 14 Jul 2009 15:40:39 -0700 |
parents | c89f86385056 |
children | 494244ae0171 |
rev | line source |
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0 | 1 /* |
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2 * Copyright 1997-2009 Sun Microsystems, Inc. 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 * | |
19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
21 * have any questions. | |
22 * | |
23 */ | |
24 | |
25 # include "incls/_precompiled.incl" | |
26 # include "incls/_objArrayKlass.cpp.incl" | |
27 | |
28 int objArrayKlass::oop_size(oop obj) const { | |
29 assert(obj->is_objArray(), "must be object array"); | |
30 return objArrayOop(obj)->object_size(); | |
31 } | |
32 | |
33 objArrayOop objArrayKlass::allocate(int length, TRAPS) { | |
34 if (length >= 0) { | |
35 if (length <= arrayOopDesc::max_array_length(T_OBJECT)) { | |
36 int size = objArrayOopDesc::object_size(length); | |
37 KlassHandle h_k(THREAD, as_klassOop()); | |
38 objArrayOop a = (objArrayOop)CollectedHeap::array_allocate(h_k, size, length, CHECK_NULL); | |
39 assert(a->is_parsable(), "Can't publish unless parsable"); | |
40 return a; | |
41 } else { | |
42 THROW_OOP_0(Universe::out_of_memory_error_array_size()); | |
43 } | |
44 } else { | |
45 THROW_0(vmSymbols::java_lang_NegativeArraySizeException()); | |
46 } | |
47 } | |
48 | |
49 static int multi_alloc_counter = 0; | |
50 | |
51 oop objArrayKlass::multi_allocate(int rank, jint* sizes, TRAPS) { | |
52 int length = *sizes; | |
53 // Call to lower_dimension uses this pointer, so most be called before a | |
54 // possible GC | |
55 KlassHandle h_lower_dimension(THREAD, lower_dimension()); | |
56 // If length < 0 allocate will throw an exception. | |
57 objArrayOop array = allocate(length, CHECK_NULL); | |
58 assert(array->is_parsable(), "Don't handlize unless parsable"); | |
59 objArrayHandle h_array (THREAD, array); | |
60 if (rank > 1) { | |
61 if (length != 0) { | |
62 for (int index = 0; index < length; index++) { | |
63 arrayKlass* ak = arrayKlass::cast(h_lower_dimension()); | |
64 oop sub_array = ak->multi_allocate(rank-1, &sizes[1], CHECK_NULL); | |
65 assert(sub_array->is_parsable(), "Don't publish until parsable"); | |
66 h_array->obj_at_put(index, sub_array); | |
67 } | |
68 } else { | |
69 // Since this array dimension has zero length, nothing will be | |
70 // allocated, however the lower dimension values must be checked | |
71 // for illegal values. | |
72 for (int i = 0; i < rank - 1; ++i) { | |
73 sizes += 1; | |
74 if (*sizes < 0) { | |
75 THROW_0(vmSymbols::java_lang_NegativeArraySizeException()); | |
76 } | |
77 } | |
78 } | |
79 } | |
80 return h_array(); | |
81 } | |
82 | |
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83 // Either oop or narrowOop depending on UseCompressedOops. |
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84 template <class T> void objArrayKlass::do_copy(arrayOop s, T* src, |
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85 arrayOop d, T* dst, int length, TRAPS) { |
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86 |
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87 BarrierSet* bs = Universe::heap()->barrier_set(); |
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88 // For performance reasons, we assume we are that the write barrier we |
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89 // are using has optimized modes for arrays of references. At least one |
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90 // of the asserts below will fail if this is not the case. |
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91 assert(bs->has_write_ref_array_opt(), "Barrier set must have ref array opt"); |
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92 assert(bs->has_write_ref_array_pre_opt(), "For pre-barrier as well."); |
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93 |
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94 if (s == d) { |
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95 // since source and destination are equal we do not need conversion checks. |
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96 assert(length > 0, "sanity check"); |
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97 bs->write_ref_array_pre(dst, length); |
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98 Copy::conjoint_oops_atomic(src, dst, length); |
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99 } else { |
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100 // We have to make sure all elements conform to the destination array |
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101 klassOop bound = objArrayKlass::cast(d->klass())->element_klass(); |
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102 klassOop stype = objArrayKlass::cast(s->klass())->element_klass(); |
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103 if (stype == bound || Klass::cast(stype)->is_subtype_of(bound)) { |
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104 // elements are guaranteed to be subtypes, so no check necessary |
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105 bs->write_ref_array_pre(dst, length); |
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106 Copy::conjoint_oops_atomic(src, dst, length); |
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107 } else { |
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108 // slow case: need individual subtype checks |
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109 // note: don't use obj_at_put below because it includes a redundant store check |
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110 T* from = src; |
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111 T* end = from + length; |
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112 for (T* p = dst; from < end; from++, p++) { |
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113 // XXX this is going to be slow. |
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114 T element = *from; |
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115 // even slower now |
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116 bool element_is_null = oopDesc::is_null(element); |
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117 oop new_val = element_is_null ? oop(NULL) |
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118 : oopDesc::decode_heap_oop_not_null(element); |
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119 if (element_is_null || |
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120 Klass::cast((new_val->klass()))->is_subtype_of(bound)) { |
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121 bs->write_ref_field_pre(p, new_val); |
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122 *p = *from; |
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123 } else { |
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124 // We must do a barrier to cover the partial copy. |
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125 const size_t pd = pointer_delta(p, dst, (size_t)heapOopSize); |
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126 // pointer delta is scaled to number of elements (length field in |
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127 // objArrayOop) which we assume is 32 bit. |
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128 assert(pd == (size_t)(int)pd, "length field overflow"); |
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129 const size_t done_word_len = objArrayOopDesc::array_size((int)pd); |
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130 bs->write_ref_array(MemRegion((HeapWord*)dst, done_word_len)); |
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131 THROW(vmSymbols::java_lang_ArrayStoreException()); |
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132 return; |
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133 } |
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134 } |
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135 } |
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136 } |
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137 const size_t word_len = objArrayOopDesc::array_size(length); |
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138 bs->write_ref_array(MemRegion((HeapWord*)dst, word_len)); |
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139 } |
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140 |
0 | 141 void objArrayKlass::copy_array(arrayOop s, int src_pos, arrayOop d, |
142 int dst_pos, int length, TRAPS) { | |
143 assert(s->is_objArray(), "must be obj array"); | |
144 | |
145 if (!d->is_objArray()) { | |
146 THROW(vmSymbols::java_lang_ArrayStoreException()); | |
147 } | |
148 | |
149 // Check is all offsets and lengths are non negative | |
150 if (src_pos < 0 || dst_pos < 0 || length < 0) { | |
151 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); | |
152 } | |
153 // Check if the ranges are valid | |
154 if ( (((unsigned int) length + (unsigned int) src_pos) > (unsigned int) s->length()) | |
155 || (((unsigned int) length + (unsigned int) dst_pos) > (unsigned int) d->length()) ) { | |
156 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); | |
157 } | |
158 | |
159 // Special case. Boundary cases must be checked first | |
160 // This allows the following call: copy_array(s, s.length(), d.length(), 0). | |
161 // This is correct, since the position is supposed to be an 'in between point', i.e., s.length(), | |
162 // points to the right of the last element. | |
163 if (length==0) { | |
164 return; | |
165 } | |
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166 if (UseCompressedOops) { |
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167 narrowOop* const src = objArrayOop(s)->obj_at_addr<narrowOop>(src_pos); |
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168 narrowOop* const dst = objArrayOop(d)->obj_at_addr<narrowOop>(dst_pos); |
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169 do_copy<narrowOop>(s, src, d, dst, length, CHECK); |
0 | 170 } else { |
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171 oop* const src = objArrayOop(s)->obj_at_addr<oop>(src_pos); |
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172 oop* const dst = objArrayOop(d)->obj_at_addr<oop>(dst_pos); |
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173 do_copy<oop> (s, src, d, dst, length, CHECK); |
0 | 174 } |
175 } | |
176 | |
177 | |
178 klassOop objArrayKlass::array_klass_impl(bool or_null, int n, TRAPS) { | |
179 objArrayKlassHandle h_this(THREAD, as_klassOop()); | |
180 return array_klass_impl(h_this, or_null, n, CHECK_NULL); | |
181 } | |
182 | |
183 | |
184 klassOop objArrayKlass::array_klass_impl(objArrayKlassHandle this_oop, bool or_null, int n, TRAPS) { | |
185 | |
186 assert(this_oop->dimension() <= n, "check order of chain"); | |
187 int dimension = this_oop->dimension(); | |
188 if (dimension == n) | |
189 return this_oop(); | |
190 | |
191 objArrayKlassHandle ak (THREAD, this_oop->higher_dimension()); | |
192 if (ak.is_null()) { | |
193 if (or_null) return NULL; | |
194 | |
195 ResourceMark rm; | |
196 JavaThread *jt = (JavaThread *)THREAD; | |
197 { | |
198 MutexLocker mc(Compile_lock, THREAD); // for vtables | |
199 // Ensure atomic creation of higher dimensions | |
200 MutexLocker mu(MultiArray_lock, THREAD); | |
201 | |
202 // Check if another thread beat us | |
203 ak = objArrayKlassHandle(THREAD, this_oop->higher_dimension()); | |
204 if( ak.is_null() ) { | |
205 | |
206 // Create multi-dim klass object and link them together | |
207 klassOop new_klass = | |
208 objArrayKlassKlass::cast(Universe::objArrayKlassKlassObj())-> | |
209 allocate_objArray_klass(dimension + 1, this_oop, CHECK_NULL); | |
210 ak = objArrayKlassHandle(THREAD, new_klass); | |
211 this_oop->set_higher_dimension(ak()); | |
212 ak->set_lower_dimension(this_oop()); | |
213 assert(ak->oop_is_objArray(), "incorrect initialization of objArrayKlass"); | |
214 } | |
215 } | |
216 } else { | |
217 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops()); | |
218 } | |
219 | |
220 if (or_null) { | |
221 return ak->array_klass_or_null(n); | |
222 } | |
223 return ak->array_klass(n, CHECK_NULL); | |
224 } | |
225 | |
226 klassOop objArrayKlass::array_klass_impl(bool or_null, TRAPS) { | |
227 return array_klass_impl(or_null, dimension() + 1, CHECK_NULL); | |
228 } | |
229 | |
230 bool objArrayKlass::can_be_primary_super_slow() const { | |
231 if (!bottom_klass()->klass_part()->can_be_primary_super()) | |
232 // array of interfaces | |
233 return false; | |
234 else | |
235 return Klass::can_be_primary_super_slow(); | |
236 } | |
237 | |
238 objArrayOop objArrayKlass::compute_secondary_supers(int num_extra_slots, TRAPS) { | |
239 // interfaces = { cloneable_klass, serializable_klass, elemSuper[], ... }; | |
240 objArrayOop es = Klass::cast(element_klass())->secondary_supers(); | |
241 objArrayHandle elem_supers (THREAD, es); | |
242 int num_elem_supers = elem_supers.is_null() ? 0 : elem_supers->length(); | |
243 int num_secondaries = num_extra_slots + 2 + num_elem_supers; | |
244 if (num_secondaries == 2) { | |
245 // Must share this for correct bootstrapping! | |
246 return Universe::the_array_interfaces_array(); | |
247 } else { | |
248 objArrayOop sec_oop = oopFactory::new_system_objArray(num_secondaries, CHECK_NULL); | |
249 objArrayHandle secondaries(THREAD, sec_oop); | |
250 secondaries->obj_at_put(num_extra_slots+0, SystemDictionary::cloneable_klass()); | |
251 secondaries->obj_at_put(num_extra_slots+1, SystemDictionary::serializable_klass()); | |
252 for (int i = 0; i < num_elem_supers; i++) { | |
253 klassOop elem_super = (klassOop) elem_supers->obj_at(i); | |
254 klassOop array_super = elem_super->klass_part()->array_klass_or_null(); | |
255 assert(array_super != NULL, "must already have been created"); | |
256 secondaries->obj_at_put(num_extra_slots+2+i, array_super); | |
257 } | |
258 return secondaries(); | |
259 } | |
260 } | |
261 | |
262 bool objArrayKlass::compute_is_subtype_of(klassOop k) { | |
263 if (!k->klass_part()->oop_is_objArray()) | |
264 return arrayKlass::compute_is_subtype_of(k); | |
265 | |
266 objArrayKlass* oak = objArrayKlass::cast(k); | |
267 return element_klass()->klass_part()->is_subtype_of(oak->element_klass()); | |
268 } | |
269 | |
270 void objArrayKlass::initialize(TRAPS) { | |
271 Klass::cast(bottom_klass())->initialize(THREAD); // dispatches to either instanceKlass or typeArrayKlass | |
272 } | |
273 | |
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274 #define ObjArrayKlass_SPECIALIZED_OOP_ITERATE(T, a, p, do_oop) \ |
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275 { \ |
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276 T* p = (T*)(a)->base(); \ |
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277 T* const end = p + (a)->length(); \ |
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278 while (p < end) { \ |
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279 do_oop; \ |
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280 p++; \ |
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281 } \ |
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282 } |
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283 |
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284 #define ObjArrayKlass_SPECIALIZED_BOUNDED_OOP_ITERATE(T, a, p, low, high, do_oop) \ |
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285 { \ |
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286 T* const l = (T*)(low); \ |
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287 T* const h = (T*)(high); \ |
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288 T* p = (T*)(a)->base(); \ |
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289 T* end = p + (a)->length(); \ |
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290 if (p < l) p = l; \ |
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291 if (end > h) end = h; \ |
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292 while (p < end) { \ |
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293 do_oop; \ |
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294 ++p; \ |
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295 } \ |
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296 } |
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297 |
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298 #define ObjArrayKlass_OOP_ITERATE(a, p, do_oop) \ |
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299 if (UseCompressedOops) { \ |
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300 ObjArrayKlass_SPECIALIZED_OOP_ITERATE(narrowOop, \ |
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301 a, p, do_oop) \ |
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302 } else { \ |
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303 ObjArrayKlass_SPECIALIZED_OOP_ITERATE(oop, \ |
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304 a, p, do_oop) \ |
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305 } |
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306 |
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307 #define ObjArrayKlass_BOUNDED_OOP_ITERATE(a, p, low, high, do_oop) \ |
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308 if (UseCompressedOops) { \ |
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309 ObjArrayKlass_SPECIALIZED_BOUNDED_OOP_ITERATE(narrowOop, \ |
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310 a, p, low, high, do_oop) \ |
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311 } else { \ |
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312 ObjArrayKlass_SPECIALIZED_BOUNDED_OOP_ITERATE(oop, \ |
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313 a, p, low, high, do_oop) \ |
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314 } |
0 | 315 |
316 void objArrayKlass::oop_follow_contents(oop obj) { | |
317 assert (obj->is_array(), "obj must be array"); | |
113
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318 objArrayOop a = objArrayOop(obj); |
0 | 319 a->follow_header(); |
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320 ObjArrayKlass_OOP_ITERATE( \ |
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321 a, p, \ |
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322 /* we call mark_and_follow here to avoid excessive marking stack usage */ \ |
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323 MarkSweep::mark_and_follow(p)) |
0 | 324 } |
325 | |
326 #ifndef SERIALGC | |
327 void objArrayKlass::oop_follow_contents(ParCompactionManager* cm, | |
328 oop obj) { | |
329 assert (obj->is_array(), "obj must be array"); | |
113
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330 objArrayOop a = objArrayOop(obj); |
0 | 331 a->follow_header(cm); |
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332 ObjArrayKlass_OOP_ITERATE( \ |
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333 a, p, \ |
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334 /* we call mark_and_follow here to avoid excessive marking stack usage */ \ |
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335 PSParallelCompact::mark_and_follow(cm, p)) |
0 | 336 } |
337 #endif // SERIALGC | |
338 | |
339 #define ObjArrayKlass_OOP_OOP_ITERATE_DEFN(OopClosureType, nv_suffix) \ | |
340 \ | |
341 int objArrayKlass::oop_oop_iterate##nv_suffix(oop obj, \ | |
342 OopClosureType* closure) { \ | |
343 SpecializationStats::record_iterate_call##nv_suffix(SpecializationStats::oa); \ | |
344 assert (obj->is_array(), "obj must be array"); \ | |
345 objArrayOop a = objArrayOop(obj); \ | |
346 /* Get size before changing pointers. */ \ | |
347 /* Don't call size() or oop_size() since that is a virtual call. */ \ | |
348 int size = a->object_size(); \ | |
349 if (closure->do_header()) { \ | |
350 a->oop_iterate_header(closure); \ | |
351 } \ | |
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352 ObjArrayKlass_OOP_ITERATE(a, p, (closure)->do_oop##nv_suffix(p)) \ |
0 | 353 return size; \ |
354 } | |
355 | |
356 #define ObjArrayKlass_OOP_OOP_ITERATE_DEFN_m(OopClosureType, nv_suffix) \ | |
357 \ | |
358 int objArrayKlass::oop_oop_iterate##nv_suffix##_m(oop obj, \ | |
359 OopClosureType* closure, \ | |
360 MemRegion mr) { \ | |
361 SpecializationStats::record_iterate_call##nv_suffix(SpecializationStats::oa); \ | |
362 assert(obj->is_array(), "obj must be array"); \ | |
363 objArrayOop a = objArrayOop(obj); \ | |
364 /* Get size before changing pointers. */ \ | |
365 /* Don't call size() or oop_size() since that is a virtual call */ \ | |
366 int size = a->object_size(); \ | |
367 if (closure->do_header()) { \ | |
368 a->oop_iterate_header(closure, mr); \ | |
369 } \ | |
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370 ObjArrayKlass_BOUNDED_OOP_ITERATE( \ |
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371 a, p, mr.start(), mr.end(), (closure)->do_oop##nv_suffix(p)) \ |
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372 return size; \ |
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373 } |
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374 |
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375 // Like oop_oop_iterate but only iterates over a specified range and only used |
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376 // for objArrayOops. |
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377 #define ObjArrayKlass_OOP_OOP_ITERATE_DEFN_r(OopClosureType, nv_suffix) \ |
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378 \ |
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379 int objArrayKlass::oop_oop_iterate_range##nv_suffix(oop obj, \ |
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380 OopClosureType* closure, \ |
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381 int start, int end) { \ |
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382 SpecializationStats::record_iterate_call##nv_suffix(SpecializationStats::oa); \ |
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383 assert(obj->is_array(), "obj must be array"); \ |
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384 objArrayOop a = objArrayOop(obj); \ |
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385 /* Get size before changing pointers. */ \ |
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386 /* Don't call size() or oop_size() since that is a virtual call */ \ |
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387 int size = a->object_size(); \ |
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388 if (UseCompressedOops) { \ |
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389 HeapWord* low = start == 0 ? (HeapWord*)a : (HeapWord*)a->obj_at_addr<narrowOop>(start);\ |
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390 /* this might be wierd if end needs to be aligned on HeapWord boundary */ \ |
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391 HeapWord* high = (HeapWord*)((narrowOop*)a->base() + end); \ |
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392 MemRegion mr(low, high); \ |
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393 if (closure->do_header()) { \ |
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394 a->oop_iterate_header(closure, mr); \ |
0 | 395 } \ |
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396 ObjArrayKlass_SPECIALIZED_BOUNDED_OOP_ITERATE(narrowOop, \ |
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397 a, p, low, high, (closure)->do_oop##nv_suffix(p)) \ |
0 | 398 } else { \ |
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399 HeapWord* low = start == 0 ? (HeapWord*)a : (HeapWord*)a->obj_at_addr<oop>(start); \ |
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400 HeapWord* high = (HeapWord*)((oop*)a->base() + end); \ |
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401 MemRegion mr(low, high); \ |
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402 if (closure->do_header()) { \ |
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403 a->oop_iterate_header(closure, mr); \ |
0 | 404 } \ |
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405 ObjArrayKlass_SPECIALIZED_BOUNDED_OOP_ITERATE(oop, \ |
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406 a, p, low, high, (closure)->do_oop##nv_suffix(p)) \ |
0 | 407 } \ |
408 return size; \ | |
409 } | |
410 | |
411 ALL_OOP_OOP_ITERATE_CLOSURES_1(ObjArrayKlass_OOP_OOP_ITERATE_DEFN) | |
342
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412 ALL_OOP_OOP_ITERATE_CLOSURES_2(ObjArrayKlass_OOP_OOP_ITERATE_DEFN) |
0 | 413 ALL_OOP_OOP_ITERATE_CLOSURES_1(ObjArrayKlass_OOP_OOP_ITERATE_DEFN_m) |
342
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414 ALL_OOP_OOP_ITERATE_CLOSURES_2(ObjArrayKlass_OOP_OOP_ITERATE_DEFN_m) |
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415 ALL_OOP_OOP_ITERATE_CLOSURES_1(ObjArrayKlass_OOP_OOP_ITERATE_DEFN_r) |
342
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416 ALL_OOP_OOP_ITERATE_CLOSURES_2(ObjArrayKlass_OOP_OOP_ITERATE_DEFN_r) |
0 | 417 |
418 int objArrayKlass::oop_adjust_pointers(oop obj) { | |
419 assert(obj->is_objArray(), "obj must be obj array"); | |
420 objArrayOop a = objArrayOop(obj); | |
421 // Get size before changing pointers. | |
422 // Don't call size() or oop_size() since that is a virtual call. | |
423 int size = a->object_size(); | |
424 a->adjust_header(); | |
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425 ObjArrayKlass_OOP_ITERATE(a, p, MarkSweep::adjust_pointer(p)) |
0 | 426 return size; |
427 } | |
428 | |
429 #ifndef SERIALGC | |
430 void objArrayKlass::oop_copy_contents(PSPromotionManager* pm, oop obj) { | |
431 assert(!pm->depth_first(), "invariant"); | |
432 assert(obj->is_objArray(), "obj must be obj array"); | |
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433 ObjArrayKlass_OOP_ITERATE( \ |
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434 objArrayOop(obj), p, \ |
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435 if (PSScavenge::should_scavenge(p)) { \ |
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436 pm->claim_or_forward_breadth(p); \ |
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437 }) |
0 | 438 } |
439 | |
440 void objArrayKlass::oop_push_contents(PSPromotionManager* pm, oop obj) { | |
441 assert(pm->depth_first(), "invariant"); | |
442 assert(obj->is_objArray(), "obj must be obj array"); | |
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443 ObjArrayKlass_OOP_ITERATE( \ |
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444 objArrayOop(obj), p, \ |
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445 if (PSScavenge::should_scavenge(p)) { \ |
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446 pm->claim_or_forward_depth(p); \ |
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447 }) |
0 | 448 } |
449 | |
450 int objArrayKlass::oop_update_pointers(ParCompactionManager* cm, oop obj) { | |
451 assert (obj->is_objArray(), "obj must be obj array"); | |
452 objArrayOop a = objArrayOop(obj); | |
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453 ObjArrayKlass_OOP_ITERATE(a, p, PSParallelCompact::adjust_pointer(p)) |
0 | 454 return a->object_size(); |
455 } | |
456 | |
457 int objArrayKlass::oop_update_pointers(ParCompactionManager* cm, oop obj, | |
458 HeapWord* beg_addr, HeapWord* end_addr) { | |
459 assert (obj->is_objArray(), "obj must be obj array"); | |
460 objArrayOop a = objArrayOop(obj); | |
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461 ObjArrayKlass_BOUNDED_OOP_ITERATE( \ |
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462 a, p, beg_addr, end_addr, \ |
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463 PSParallelCompact::adjust_pointer(p)) |
0 | 464 return a->object_size(); |
465 } | |
466 #endif // SERIALGC | |
467 | |
468 // JVM support | |
469 | |
470 jint objArrayKlass::compute_modifier_flags(TRAPS) const { | |
471 // The modifier for an objectArray is the same as its element | |
472 if (element_klass() == NULL) { | |
473 assert(Universe::is_bootstrapping(), "partial objArray only at startup"); | |
474 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC; | |
475 } | |
398
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476 // Return the flags of the bottom element type. |
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477 jint element_flags = Klass::cast(bottom_klass())->compute_modifier_flags(CHECK_0); |
0 | 478 |
479 return (element_flags & (JVM_ACC_PUBLIC | JVM_ACC_PRIVATE | JVM_ACC_PROTECTED)) | |
480 | (JVM_ACC_ABSTRACT | JVM_ACC_FINAL); | |
481 } | |
482 | |
483 | |
484 #ifndef PRODUCT | |
485 // Printing | |
486 | |
487 void objArrayKlass::oop_print_on(oop obj, outputStream* st) { | |
488 arrayKlass::oop_print_on(obj, st); | |
489 assert(obj->is_objArray(), "must be objArray"); | |
490 objArrayOop oa = objArrayOop(obj); | |
491 int print_len = MIN2((intx) oa->length(), MaxElementPrintSize); | |
492 for(int index = 0; index < print_len; index++) { | |
493 st->print(" - %3d : ", index); | |
494 oa->obj_at(index)->print_value_on(st); | |
495 st->cr(); | |
496 } | |
497 int remaining = oa->length() - print_len; | |
498 if (remaining > 0) { | |
499 tty->print_cr(" - <%d more elements, increase MaxElementPrintSize to print>", remaining); | |
500 } | |
501 } | |
502 | |
665
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503 static int max_objArray_print_length = 4; |
0 | 504 |
505 void objArrayKlass::oop_print_value_on(oop obj, outputStream* st) { | |
506 assert(obj->is_objArray(), "must be objArray"); | |
665
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507 st->print("a "); |
0 | 508 element_klass()->print_value_on(st); |
665
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509 int len = objArrayOop(obj)->length(); |
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510 st->print("[%d] ", len); |
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511 obj->print_address_on(st); |
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512 if (PrintOopAddress || PrintMiscellaneous && (WizardMode || Verbose)) { |
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513 st->print("{"); |
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514 for (int i = 0; i < len; i++) { |
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515 if (i > max_objArray_print_length) { |
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516 st->print("..."); break; |
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517 } |
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518 st->print(" "INTPTR_FORMAT, (intptr_t)(void*)objArrayOop(obj)->obj_at(i)); |
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519 } |
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520 st->print(" }"); |
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521 } |
0 | 522 } |
523 | |
524 #endif // PRODUCT | |
525 | |
526 const char* objArrayKlass::internal_name() const { | |
527 return external_name(); | |
528 } | |
529 | |
530 // Verification | |
531 | |
532 void objArrayKlass::oop_verify_on(oop obj, outputStream* st) { | |
533 arrayKlass::oop_verify_on(obj, st); | |
534 guarantee(obj->is_objArray(), "must be objArray"); | |
535 objArrayOop oa = objArrayOop(obj); | |
536 for(int index = 0; index < oa->length(); index++) { | |
537 guarantee(oa->obj_at(index)->is_oop_or_null(), "should be oop"); | |
538 } | |
539 } | |
540 | |
541 void objArrayKlass::oop_verify_old_oop(oop obj, oop* p, bool allow_dirty) { | |
542 /* $$$ move into remembered set verification? | |
543 RememberedSet::verify_old_oop(obj, p, allow_dirty, true); | |
544 */ | |
545 } | |
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546 void objArrayKlass::oop_verify_old_oop(oop obj, narrowOop* p, bool allow_dirty) {} |