Mercurial > hg > graal-jvmci-8
annotate src/share/vm/memory/universe.cpp @ 23822:626f594dffa6
8139040: Fix initializations before ShouldNotReachHere() etc. and enable -Wuninitialized on linux.
Reviewed-by: stuefe, coleenp, roland
author | csahu |
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date | Tue, 01 Mar 2016 12:50:37 +0530 |
parents | 6acf14e730dd |
children | f13e777eb255 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2016, 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 #include "precompiled.hpp" |
26 #include "classfile/classLoader.hpp" | |
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27 #include "classfile/classLoaderData.hpp" |
1972 | 28 #include "classfile/javaClasses.hpp" |
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29 #if INCLUDE_CDS |
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30 #include "classfile/sharedClassUtil.hpp" |
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31 #endif |
1972 | 32 #include "classfile/symbolTable.hpp" |
33 #include "classfile/systemDictionary.hpp" | |
34 #include "classfile/vmSymbols.hpp" | |
35 #include "code/codeCache.hpp" | |
36 #include "code/dependencies.hpp" | |
37 #include "gc_interface/collectedHeap.inline.hpp" | |
38 #include "interpreter/interpreter.hpp" | |
39 #include "memory/cardTableModRefBS.hpp" | |
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40 #include "memory/filemap.hpp" |
1972 | 41 #include "memory/gcLocker.inline.hpp" |
42 #include "memory/genCollectedHeap.hpp" | |
43 #include "memory/genRemSet.hpp" | |
44 #include "memory/generation.hpp" | |
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45 #include "memory/metadataFactory.hpp" |
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46 #include "memory/metaspaceShared.hpp" |
1972 | 47 #include "memory/oopFactory.hpp" |
48 #include "memory/space.hpp" | |
49 #include "memory/universe.hpp" | |
50 #include "memory/universe.inline.hpp" | |
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51 #include "oops/constantPool.hpp" |
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52 #include "oops/instanceClassLoaderKlass.hpp" |
1972 | 53 #include "oops/instanceKlass.hpp" |
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54 #include "oops/instanceMirrorKlass.hpp" |
1972 | 55 #include "oops/instanceRefKlass.hpp" |
56 #include "oops/oop.inline.hpp" | |
57 #include "oops/typeArrayKlass.hpp" | |
58 #include "prims/jvmtiRedefineClassesTrace.hpp" | |
59 #include "runtime/arguments.hpp" | |
60 #include "runtime/deoptimization.hpp" | |
61 #include "runtime/fprofiler.hpp" | |
62 #include "runtime/handles.inline.hpp" | |
63 #include "runtime/init.hpp" | |
64 #include "runtime/java.hpp" | |
65 #include "runtime/javaCalls.hpp" | |
66 #include "runtime/sharedRuntime.hpp" | |
67 #include "runtime/synchronizer.hpp" | |
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68 #include "runtime/thread.inline.hpp" |
1972 | 69 #include "runtime/timer.hpp" |
70 #include "runtime/vm_operations.hpp" | |
71 #include "services/memoryService.hpp" | |
72 #include "utilities/copy.hpp" | |
73 #include "utilities/events.hpp" | |
74 #include "utilities/hashtable.inline.hpp" | |
75 #include "utilities/preserveException.hpp" | |
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76 #include "utilities/macros.hpp" |
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77 #if INCLUDE_ALL_GCS |
1972 | 78 #include "gc_implementation/concurrentMarkSweep/cmsAdaptiveSizePolicy.hpp" |
79 #include "gc_implementation/concurrentMarkSweep/cmsCollectorPolicy.hpp" | |
80 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp" | |
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81 #include "gc_implementation/g1/g1CollectorPolicy_ext.hpp" |
1972 | 82 #include "gc_implementation/parallelScavenge/parallelScavengeHeap.hpp" |
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83 #endif // INCLUDE_ALL_GCS |
0 | 84 |
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85 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC |
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86 |
0 | 87 // Known objects |
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88 Klass* Universe::_boolArrayKlassObj = NULL; |
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89 Klass* Universe::_byteArrayKlassObj = NULL; |
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90 Klass* Universe::_charArrayKlassObj = NULL; |
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91 Klass* Universe::_intArrayKlassObj = NULL; |
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92 Klass* Universe::_shortArrayKlassObj = NULL; |
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93 Klass* Universe::_longArrayKlassObj = NULL; |
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94 Klass* Universe::_singleArrayKlassObj = NULL; |
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95 Klass* Universe::_doubleArrayKlassObj = NULL; |
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96 Klass* Universe::_typeArrayKlassObjs[T_VOID+1] = { NULL /*, NULL...*/ }; |
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97 Klass* Universe::_objectArrayKlassObj = NULL; |
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98 oop Universe::_int_mirror = NULL; |
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99 oop Universe::_float_mirror = NULL; |
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100 oop Universe::_double_mirror = NULL; |
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101 oop Universe::_byte_mirror = NULL; |
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102 oop Universe::_bool_mirror = NULL; |
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103 oop Universe::_char_mirror = NULL; |
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104 oop Universe::_long_mirror = NULL; |
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105 oop Universe::_short_mirror = NULL; |
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106 oop Universe::_void_mirror = NULL; |
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107 oop Universe::_mirrors[T_VOID+1] = { NULL /*, NULL...*/ }; |
0 | 108 oop Universe::_main_thread_group = NULL; |
109 oop Universe::_system_thread_group = NULL; | |
110 objArrayOop Universe::_the_empty_class_klass_array = NULL; | |
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111 Array<Klass*>* Universe::_the_array_interfaces_array = NULL; |
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112 oop Universe::_the_null_string = NULL; |
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113 oop Universe::_the_min_jint_string = NULL; |
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114 LatestMethodCache* Universe::_finalizer_register_cache = NULL; |
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115 LatestMethodCache* Universe::_loader_addClass_cache = NULL; |
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116 LatestMethodCache* Universe::_pd_implies_cache = NULL; |
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117 LatestMethodCache* Universe::_throw_illegal_access_error_cache = NULL; |
0 | 118 oop Universe::_out_of_memory_error_java_heap = NULL; |
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119 oop Universe::_out_of_memory_error_metaspace = NULL; |
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120 oop Universe::_out_of_memory_error_class_metaspace = NULL; |
0 | 121 oop Universe::_out_of_memory_error_array_size = NULL; |
122 oop Universe::_out_of_memory_error_gc_overhead_limit = NULL; | |
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123 oop Universe::_out_of_memory_error_realloc_objects = NULL; |
0 | 124 objArrayOop Universe::_preallocated_out_of_memory_error_array = NULL; |
125 volatile jint Universe::_preallocated_out_of_memory_error_avail_count = 0; | |
126 bool Universe::_verify_in_progress = false; | |
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127 long Universe::verify_flags = Universe::Verify_All; |
0 | 128 oop Universe::_null_ptr_exception_instance = NULL; |
129 oop Universe::_arithmetic_exception_instance = NULL; | |
130 oop Universe::_virtual_machine_error_instance = NULL; | |
131 oop Universe::_vm_exception = NULL; | |
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132 oop Universe::_allocation_context_notification_obj = NULL; |
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133 |
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134 Array<int>* Universe::_the_empty_int_array = NULL; |
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135 Array<u2>* Universe::_the_empty_short_array = NULL; |
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136 Array<Klass*>* Universe::_the_empty_klass_array = NULL; |
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137 Array<Method*>* Universe::_the_empty_method_array = NULL; |
0 | 138 |
139 // These variables are guarded by FullGCALot_lock. | |
140 debug_only(objArrayOop Universe::_fullgc_alot_dummy_array = NULL;) | |
141 debug_only(int Universe::_fullgc_alot_dummy_next = 0;) | |
142 | |
143 // Heap | |
144 int Universe::_verify_count = 0; | |
145 | |
146 int Universe::_base_vtable_size = 0; | |
147 bool Universe::_bootstrapping = false; | |
148 bool Universe::_fully_initialized = false; | |
149 | |
150 size_t Universe::_heap_capacity_at_last_gc; | |
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151 size_t Universe::_heap_used_at_last_gc = 0; |
0 | 152 |
153 CollectedHeap* Universe::_collectedHeap = NULL; | |
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154 |
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155 NarrowPtrStruct Universe::_narrow_oop = { NULL, 0, true }; |
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156 NarrowPtrStruct Universe::_narrow_klass = { NULL, 0, true }; |
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157 address Universe::_narrow_ptrs_base; |
0 | 158 |
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159 void Universe::basic_type_classes_do(void f(Klass*)) { |
0 | 160 f(boolArrayKlassObj()); |
161 f(byteArrayKlassObj()); | |
162 f(charArrayKlassObj()); | |
163 f(intArrayKlassObj()); | |
164 f(shortArrayKlassObj()); | |
165 f(longArrayKlassObj()); | |
166 f(singleArrayKlassObj()); | |
167 f(doubleArrayKlassObj()); | |
168 } | |
169 | |
170 void Universe::oops_do(OopClosure* f, bool do_all) { | |
171 | |
172 f->do_oop((oop*) &_int_mirror); | |
173 f->do_oop((oop*) &_float_mirror); | |
174 f->do_oop((oop*) &_double_mirror); | |
175 f->do_oop((oop*) &_byte_mirror); | |
176 f->do_oop((oop*) &_bool_mirror); | |
177 f->do_oop((oop*) &_char_mirror); | |
178 f->do_oop((oop*) &_long_mirror); | |
179 f->do_oop((oop*) &_short_mirror); | |
180 f->do_oop((oop*) &_void_mirror); | |
181 | |
182 for (int i = T_BOOLEAN; i < T_VOID+1; i++) { | |
183 f->do_oop((oop*) &_mirrors[i]); | |
184 } | |
185 assert(_mirrors[0] == NULL && _mirrors[T_BOOLEAN - 1] == NULL, "checking"); | |
186 | |
187 f->do_oop((oop*)&_the_empty_class_klass_array); | |
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188 f->do_oop((oop*)&_the_null_string); |
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189 f->do_oop((oop*)&_the_min_jint_string); |
0 | 190 f->do_oop((oop*)&_out_of_memory_error_java_heap); |
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191 f->do_oop((oop*)&_out_of_memory_error_metaspace); |
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192 f->do_oop((oop*)&_out_of_memory_error_class_metaspace); |
0 | 193 f->do_oop((oop*)&_out_of_memory_error_array_size); |
194 f->do_oop((oop*)&_out_of_memory_error_gc_overhead_limit); | |
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195 f->do_oop((oop*)&_out_of_memory_error_realloc_objects); |
0 | 196 f->do_oop((oop*)&_preallocated_out_of_memory_error_array); |
197 f->do_oop((oop*)&_null_ptr_exception_instance); | |
198 f->do_oop((oop*)&_arithmetic_exception_instance); | |
199 f->do_oop((oop*)&_virtual_machine_error_instance); | |
200 f->do_oop((oop*)&_main_thread_group); | |
201 f->do_oop((oop*)&_system_thread_group); | |
202 f->do_oop((oop*)&_vm_exception); | |
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203 f->do_oop((oop*)&_allocation_context_notification_obj); |
0 | 204 debug_only(f->do_oop((oop*)&_fullgc_alot_dummy_array);) |
205 } | |
206 | |
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207 // Serialize metadata in and out of CDS archive, not oops. |
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208 void Universe::serialize(SerializeClosure* f, bool do_all) { |
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209 |
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210 f->do_ptr((void**)&_boolArrayKlassObj); |
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211 f->do_ptr((void**)&_byteArrayKlassObj); |
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212 f->do_ptr((void**)&_charArrayKlassObj); |
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213 f->do_ptr((void**)&_intArrayKlassObj); |
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214 f->do_ptr((void**)&_shortArrayKlassObj); |
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215 f->do_ptr((void**)&_longArrayKlassObj); |
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216 f->do_ptr((void**)&_singleArrayKlassObj); |
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217 f->do_ptr((void**)&_doubleArrayKlassObj); |
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218 f->do_ptr((void**)&_objectArrayKlassObj); |
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219 |
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220 { |
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221 for (int i = 0; i < T_VOID+1; i++) { |
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222 if (_typeArrayKlassObjs[i] != NULL) { |
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223 assert(i >= T_BOOLEAN, "checking"); |
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224 f->do_ptr((void**)&_typeArrayKlassObjs[i]); |
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225 } else if (do_all) { |
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226 f->do_ptr((void**)&_typeArrayKlassObjs[i]); |
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227 } |
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228 } |
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229 } |
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230 |
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231 f->do_ptr((void**)&_the_array_interfaces_array); |
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232 f->do_ptr((void**)&_the_empty_int_array); |
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233 f->do_ptr((void**)&_the_empty_short_array); |
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234 f->do_ptr((void**)&_the_empty_method_array); |
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235 f->do_ptr((void**)&_the_empty_klass_array); |
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236 _finalizer_register_cache->serialize(f); |
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237 _loader_addClass_cache->serialize(f); |
11010 | 238 _pd_implies_cache->serialize(f); |
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239 _throw_illegal_access_error_cache->serialize(f); |
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240 } |
0 | 241 |
242 void Universe::check_alignment(uintx size, uintx alignment, const char* name) { | |
243 if (size < alignment || size % alignment != 0) { | |
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244 vm_exit_during_initialization( |
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245 err_msg("Size of %s (" UINTX_FORMAT " bytes) must be aligned to " UINTX_FORMAT " bytes", name, size, alignment)); |
0 | 246 } |
247 } | |
248 | |
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249 void initialize_basic_type_klass(Klass* k, TRAPS) { |
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250 Klass* ok = SystemDictionary::Object_klass(); |
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251 if (UseSharedSpaces) { |
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252 ClassLoaderData* loader_data = ClassLoaderData::the_null_class_loader_data(); |
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253 assert(k->super() == ok, "u3"); |
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254 k->restore_unshareable_info(loader_data, Handle(), CHECK); |
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255 } else { |
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256 k->initialize_supers(ok, CHECK); |
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257 } |
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258 k->append_to_sibling_list(); |
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259 } |
0 | 260 |
261 void Universe::genesis(TRAPS) { | |
262 ResourceMark rm; | |
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263 |
0 | 264 { FlagSetting fs(_bootstrapping, true); |
265 | |
266 { MutexLocker mc(Compile_lock); | |
267 | |
268 // determine base vtable size; without that we cannot create the array klasses | |
269 compute_base_vtable_size(); | |
270 | |
271 if (!UseSharedSpaces) { | |
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272 _boolArrayKlassObj = TypeArrayKlass::create_klass(T_BOOLEAN, sizeof(jboolean), CHECK); |
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273 _charArrayKlassObj = TypeArrayKlass::create_klass(T_CHAR, sizeof(jchar), CHECK); |
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274 _singleArrayKlassObj = TypeArrayKlass::create_klass(T_FLOAT, sizeof(jfloat), CHECK); |
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275 _doubleArrayKlassObj = TypeArrayKlass::create_klass(T_DOUBLE, sizeof(jdouble), CHECK); |
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276 _byteArrayKlassObj = TypeArrayKlass::create_klass(T_BYTE, sizeof(jbyte), CHECK); |
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277 _shortArrayKlassObj = TypeArrayKlass::create_klass(T_SHORT, sizeof(jshort), CHECK); |
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278 _intArrayKlassObj = TypeArrayKlass::create_klass(T_INT, sizeof(jint), CHECK); |
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279 _longArrayKlassObj = TypeArrayKlass::create_klass(T_LONG, sizeof(jlong), CHECK); |
0 | 280 |
281 _typeArrayKlassObjs[T_BOOLEAN] = _boolArrayKlassObj; | |
282 _typeArrayKlassObjs[T_CHAR] = _charArrayKlassObj; | |
283 _typeArrayKlassObjs[T_FLOAT] = _singleArrayKlassObj; | |
284 _typeArrayKlassObjs[T_DOUBLE] = _doubleArrayKlassObj; | |
285 _typeArrayKlassObjs[T_BYTE] = _byteArrayKlassObj; | |
286 _typeArrayKlassObjs[T_SHORT] = _shortArrayKlassObj; | |
287 _typeArrayKlassObjs[T_INT] = _intArrayKlassObj; | |
288 _typeArrayKlassObjs[T_LONG] = _longArrayKlassObj; | |
289 | |
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290 ClassLoaderData* null_cld = ClassLoaderData::the_null_class_loader_data(); |
0 | 291 |
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292 _the_array_interfaces_array = MetadataFactory::new_array<Klass*>(null_cld, 2, NULL, CHECK); |
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293 _the_empty_int_array = MetadataFactory::new_array<int>(null_cld, 0, CHECK); |
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294 _the_empty_short_array = MetadataFactory::new_array<u2>(null_cld, 0, CHECK); |
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295 _the_empty_method_array = MetadataFactory::new_array<Method*>(null_cld, 0, CHECK); |
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296 _the_empty_klass_array = MetadataFactory::new_array<Klass*>(null_cld, 0, CHECK); |
0 | 297 } |
298 } | |
299 | |
300 vmSymbols::initialize(CHECK); | |
301 | |
302 SystemDictionary::initialize(CHECK); | |
303 | |
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304 Klass* ok = SystemDictionary::Object_klass(); |
0 | 305 |
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306 _the_null_string = StringTable::intern("null", CHECK); |
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307 _the_min_jint_string = StringTable::intern("-2147483648", CHECK); |
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308 |
0 | 309 if (UseSharedSpaces) { |
310 // Verify shared interfaces array. | |
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311 assert(_the_array_interfaces_array->at(0) == |
1142 | 312 SystemDictionary::Cloneable_klass(), "u3"); |
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313 assert(_the_array_interfaces_array->at(1) == |
1142 | 314 SystemDictionary::Serializable_klass(), "u3"); |
0 | 315 } else { |
316 // Set up shared interfaces array. (Do this before supers are set up.) | |
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317 _the_array_interfaces_array->at_put(0, SystemDictionary::Cloneable_klass()); |
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318 _the_array_interfaces_array->at_put(1, SystemDictionary::Serializable_klass()); |
0 | 319 } |
320 | |
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321 initialize_basic_type_klass(boolArrayKlassObj(), CHECK); |
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322 initialize_basic_type_klass(charArrayKlassObj(), CHECK); |
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323 initialize_basic_type_klass(singleArrayKlassObj(), CHECK); |
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324 initialize_basic_type_klass(doubleArrayKlassObj(), CHECK); |
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325 initialize_basic_type_klass(byteArrayKlassObj(), CHECK); |
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326 initialize_basic_type_klass(shortArrayKlassObj(), CHECK); |
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327 initialize_basic_type_klass(intArrayKlassObj(), CHECK); |
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328 initialize_basic_type_klass(longArrayKlassObj(), CHECK); |
0 | 329 } // end of core bootstrapping |
330 | |
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331 // Maybe this could be lifted up now that object array can be initialized |
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332 // during the bootstrapping. |
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333 |
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334 // OLD |
0 | 335 // Initialize _objectArrayKlass after core bootstraping to make |
336 // sure the super class is set up properly for _objectArrayKlass. | |
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337 // --- |
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338 // NEW |
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339 // Since some of the old system object arrays have been converted to |
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340 // ordinary object arrays, _objectArrayKlass will be loaded when |
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341 // SystemDictionary::initialize(CHECK); is run. See the extra check |
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342 // for Object_klass_loaded in objArrayKlassKlass::allocate_objArray_klass_impl. |
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343 _objectArrayKlassObj = InstanceKlass:: |
1142 | 344 cast(SystemDictionary::Object_klass())->array_klass(1, CHECK); |
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345 // OLD |
0 | 346 // Add the class to the class hierarchy manually to make sure that |
347 // its vtable is initialized after core bootstrapping is completed. | |
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348 // --- |
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349 // New |
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350 // Have already been initialized. |
6983 | 351 _objectArrayKlassObj->append_to_sibling_list(); |
0 | 352 |
353 // Compute is_jdk version flags. | |
354 // Only 1.3 or later has the java.lang.Shutdown class. | |
355 // Only 1.4 or later has the java.lang.CharSequence interface. | |
356 // Only 1.5 or later has the java.lang.management.MemoryUsage class. | |
242 | 357 if (JDK_Version::is_partially_initialized()) { |
358 uint8_t jdk_version; | |
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359 Klass* k = SystemDictionary::resolve_or_null( |
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360 vmSymbols::java_lang_management_MemoryUsage(), THREAD); |
0 | 361 CLEAR_PENDING_EXCEPTION; // ignore exceptions |
362 if (k == NULL) { | |
242 | 363 k = SystemDictionary::resolve_or_null( |
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364 vmSymbols::java_lang_CharSequence(), THREAD); |
0 | 365 CLEAR_PENDING_EXCEPTION; // ignore exceptions |
366 if (k == NULL) { | |
242 | 367 k = SystemDictionary::resolve_or_null( |
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368 vmSymbols::java_lang_Shutdown(), THREAD); |
0 | 369 CLEAR_PENDING_EXCEPTION; // ignore exceptions |
370 if (k == NULL) { | |
242 | 371 jdk_version = 2; |
0 | 372 } else { |
242 | 373 jdk_version = 3; |
0 | 374 } |
375 } else { | |
242 | 376 jdk_version = 4; |
0 | 377 } |
378 } else { | |
242 | 379 jdk_version = 5; |
0 | 380 } |
242 | 381 JDK_Version::fully_initialize(jdk_version); |
0 | 382 } |
383 | |
384 #ifdef ASSERT | |
385 if (FullGCALot) { | |
386 // Allocate an array of dummy objects. | |
387 // We'd like these to be at the bottom of the old generation, | |
388 // so that when we free one and then collect, | |
389 // (almost) the whole heap moves | |
390 // and we find out if we actually update all the oops correctly. | |
391 // But we can't allocate directly in the old generation, | |
392 // so we allocate wherever, and hope that the first collection | |
393 // moves these objects to the bottom of the old generation. | |
394 // We can allocate directly in the permanent generation, so we do. | |
395 int size; | |
396 if (UseConcMarkSweepGC) { | |
397 warning("Using +FullGCALot with concurrent mark sweep gc " | |
398 "will not force all objects to relocate"); | |
399 size = FullGCALotDummies; | |
400 } else { | |
401 size = FullGCALotDummies * 2; | |
402 } | |
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403 objArrayOop naked_array = oopFactory::new_objArray(SystemDictionary::Object_klass(), size, CHECK); |
0 | 404 objArrayHandle dummy_array(THREAD, naked_array); |
405 int i = 0; | |
406 while (i < size) { | |
407 // Allocate dummy in old generation | |
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408 oop dummy = InstanceKlass::cast(SystemDictionary::Object_klass())->allocate_instance(CHECK); |
0 | 409 dummy_array->obj_at_put(i++, dummy); |
410 } | |
411 { | |
412 // Only modify the global variable inside the mutex. | |
413 // If we had a race to here, the other dummy_array instances | |
414 // and their elements just get dropped on the floor, which is fine. | |
415 MutexLocker ml(FullGCALot_lock); | |
416 if (_fullgc_alot_dummy_array == NULL) { | |
417 _fullgc_alot_dummy_array = dummy_array(); | |
418 } | |
419 } | |
420 assert(i == _fullgc_alot_dummy_array->length(), "just checking"); | |
421 } | |
422 #endif | |
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423 |
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424 // Initialize dependency array for null class loader |
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425 ClassLoaderData::the_null_class_loader_data()->init_dependencies(CHECK); |
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426 |
0 | 427 } |
428 | |
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429 // CDS support for patching vtables in metadata in the shared archive. |
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430 // All types inherited from Metadata have vtables, but not types inherited |
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431 // from MetaspaceObj, because the latter does not have virtual functions. |
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432 // If the metadata type has a vtable, it cannot be shared in the read-only |
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433 // section of the CDS archive, because the vtable pointer is patched. |
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434 static inline void add_vtable(void** list, int* n, void* o, int count) { |
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435 guarantee((*n) < count, "vtable list too small"); |
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436 void* vtable = dereference_vptr(o); |
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437 assert(*(void**)(vtable) != NULL, "invalid vtable"); |
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438 list[(*n)++] = vtable; |
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439 } |
0 | 440 |
441 void Universe::init_self_patching_vtbl_list(void** list, int count) { | |
442 int n = 0; | |
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443 { InstanceKlass o; add_vtable(list, &n, &o, count); } |
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444 { InstanceClassLoaderKlass o; add_vtable(list, &n, &o, count); } |
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445 { InstanceMirrorKlass o; add_vtable(list, &n, &o, count); } |
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446 { InstanceRefKlass o; add_vtable(list, &n, &o, count); } |
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447 { TypeArrayKlass o; add_vtable(list, &n, &o, count); } |
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448 { ObjArrayKlass o; add_vtable(list, &n, &o, count); } |
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449 { Method o; add_vtable(list, &n, &o, count); } |
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450 { ConstantPool o; add_vtable(list, &n, &o, count); } |
0 | 451 } |
452 | |
453 void Universe::initialize_basic_type_mirrors(TRAPS) { | |
454 assert(_int_mirror==NULL, "basic type mirrors already initialized"); | |
455 _int_mirror = | |
456 java_lang_Class::create_basic_type_mirror("int", T_INT, CHECK); | |
457 _float_mirror = | |
458 java_lang_Class::create_basic_type_mirror("float", T_FLOAT, CHECK); | |
459 _double_mirror = | |
460 java_lang_Class::create_basic_type_mirror("double", T_DOUBLE, CHECK); | |
461 _byte_mirror = | |
462 java_lang_Class::create_basic_type_mirror("byte", T_BYTE, CHECK); | |
463 _bool_mirror = | |
464 java_lang_Class::create_basic_type_mirror("boolean",T_BOOLEAN, CHECK); | |
465 _char_mirror = | |
466 java_lang_Class::create_basic_type_mirror("char", T_CHAR, CHECK); | |
467 _long_mirror = | |
468 java_lang_Class::create_basic_type_mirror("long", T_LONG, CHECK); | |
469 _short_mirror = | |
470 java_lang_Class::create_basic_type_mirror("short", T_SHORT, CHECK); | |
471 _void_mirror = | |
472 java_lang_Class::create_basic_type_mirror("void", T_VOID, CHECK); | |
473 | |
474 _mirrors[T_INT] = _int_mirror; | |
475 _mirrors[T_FLOAT] = _float_mirror; | |
476 _mirrors[T_DOUBLE] = _double_mirror; | |
477 _mirrors[T_BYTE] = _byte_mirror; | |
478 _mirrors[T_BOOLEAN] = _bool_mirror; | |
479 _mirrors[T_CHAR] = _char_mirror; | |
480 _mirrors[T_LONG] = _long_mirror; | |
481 _mirrors[T_SHORT] = _short_mirror; | |
482 _mirrors[T_VOID] = _void_mirror; | |
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483 //_mirrors[T_OBJECT] = InstanceKlass::cast(_object_klass)->java_mirror(); |
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484 //_mirrors[T_ARRAY] = InstanceKlass::cast(_object_klass)->java_mirror(); |
0 | 485 } |
486 | |
487 void Universe::fixup_mirrors(TRAPS) { | |
488 // Bootstrap problem: all classes gets a mirror (java.lang.Class instance) assigned eagerly, | |
489 // but we cannot do that for classes created before java.lang.Class is loaded. Here we simply | |
490 // walk over permanent objects created so far (mostly classes) and fixup their mirrors. Note | |
491 // that the number of objects allocated at this point is very small. | |
1142 | 492 assert(SystemDictionary::Class_klass_loaded(), "java.lang.Class should be loaded"); |
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493 HandleMark hm(THREAD); |
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494 // Cache the start of the static fields |
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495 InstanceMirrorKlass::init_offset_of_static_fields(); |
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496 |
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497 GrowableArray <Klass*>* list = java_lang_Class::fixup_mirror_list(); |
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498 int list_length = list->length(); |
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499 for (int i = 0; i < list_length; i++) { |
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500 Klass* k = list->at(i); |
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501 assert(k->is_klass(), "List should only hold classes"); |
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502 EXCEPTION_MARK; |
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503 KlassHandle kh(THREAD, k); |
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504 java_lang_Class::fixup_mirror(kh, CATCH); |
0 | 505 } |
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506 delete java_lang_Class::fixup_mirror_list(); |
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507 java_lang_Class::set_fixup_mirror_list(NULL); |
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508 } |
0 | 509 |
510 static bool has_run_finalizers_on_exit = false; | |
511 | |
512 void Universe::run_finalizers_on_exit() { | |
513 if (has_run_finalizers_on_exit) return; | |
514 has_run_finalizers_on_exit = true; | |
515 | |
516 // Called on VM exit. This ought to be run in a separate thread. | |
517 if (TraceReferenceGC) tty->print_cr("Callback to run finalizers on exit"); | |
518 { | |
519 PRESERVE_EXCEPTION_MARK; | |
1142 | 520 KlassHandle finalizer_klass(THREAD, SystemDictionary::Finalizer_klass()); |
0 | 521 JavaValue result(T_VOID); |
522 JavaCalls::call_static( | |
523 &result, | |
524 finalizer_klass, | |
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525 vmSymbols::run_finalizers_on_exit_name(), |
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526 vmSymbols::void_method_signature(), |
0 | 527 THREAD |
528 ); | |
529 // Ignore any pending exceptions | |
530 CLEAR_PENDING_EXCEPTION; | |
531 } | |
532 } | |
533 | |
534 | |
535 // initialize_vtable could cause gc if | |
536 // 1) we specified true to initialize_vtable and | |
537 // 2) this ran after gc was enabled | |
538 // In case those ever change we use handles for oops | |
539 void Universe::reinitialize_vtable_of(KlassHandle k_h, TRAPS) { | |
540 // init vtable of k and all subclasses | |
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541 Klass* ko = k_h(); |
0 | 542 klassVtable* vt = ko->vtable(); |
543 if (vt) vt->initialize_vtable(false, CHECK); | |
544 if (ko->oop_is_instance()) { | |
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545 InstanceKlass* ik = (InstanceKlass*)ko; |
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546 for (KlassHandle s_h(THREAD, ik->subklass()); |
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547 s_h() != NULL; |
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548 s_h = KlassHandle(THREAD, s_h()->next_sibling())) { |
0 | 549 reinitialize_vtable_of(s_h, CHECK); |
550 } | |
551 } | |
552 } | |
553 | |
554 | |
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555 void initialize_itable_for_klass(Klass* k, TRAPS) { |
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556 InstanceKlass::cast(k)->itable()->initialize_itable(false, CHECK); |
0 | 557 } |
558 | |
559 | |
560 void Universe::reinitialize_itables(TRAPS) { | |
561 SystemDictionary::classes_do(initialize_itable_for_klass, CHECK); | |
562 | |
563 } | |
564 | |
565 | |
566 bool Universe::on_page_boundary(void* addr) { | |
567 return ((uintptr_t) addr) % os::vm_page_size() == 0; | |
568 } | |
569 | |
570 | |
571 bool Universe::should_fill_in_stack_trace(Handle throwable) { | |
572 // never attempt to fill in the stack trace of preallocated errors that do not have | |
573 // backtrace. These errors are kept alive forever and may be "re-used" when all | |
574 // preallocated errors with backtrace have been consumed. Also need to avoid | |
575 // a potential loop which could happen if an out of memory occurs when attempting | |
576 // to allocate the backtrace. | |
577 return ((throwable() != Universe::_out_of_memory_error_java_heap) && | |
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578 (throwable() != Universe::_out_of_memory_error_metaspace) && |
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579 (throwable() != Universe::_out_of_memory_error_class_metaspace) && |
0 | 580 (throwable() != Universe::_out_of_memory_error_array_size) && |
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581 (throwable() != Universe::_out_of_memory_error_gc_overhead_limit) && |
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582 (throwable() != Universe::_out_of_memory_error_realloc_objects)); |
0 | 583 } |
584 | |
585 | |
586 oop Universe::gen_out_of_memory_error(oop default_err) { | |
587 // generate an out of memory error: | |
588 // - if there is a preallocated error with backtrace available then return it wth | |
589 // a filled in stack trace. | |
590 // - if there are no preallocated errors with backtrace available then return | |
591 // an error without backtrace. | |
592 int next; | |
593 if (_preallocated_out_of_memory_error_avail_count > 0) { | |
594 next = (int)Atomic::add(-1, &_preallocated_out_of_memory_error_avail_count); | |
595 assert(next < (int)PreallocatedOutOfMemoryErrorCount, "avail count is corrupt"); | |
596 } else { | |
597 next = -1; | |
598 } | |
599 if (next < 0) { | |
600 // all preallocated errors have been used. | |
601 // return default | |
602 return default_err; | |
603 } else { | |
604 // get the error object at the slot and set set it to NULL so that the | |
605 // array isn't keeping it alive anymore. | |
606 oop exc = preallocated_out_of_memory_errors()->obj_at(next); | |
607 assert(exc != NULL, "slot has been used already"); | |
608 preallocated_out_of_memory_errors()->obj_at_put(next, NULL); | |
609 | |
610 // use the message from the default error | |
611 oop msg = java_lang_Throwable::message(default_err); | |
612 assert(msg != NULL, "no message"); | |
613 java_lang_Throwable::set_message(exc, msg); | |
614 | |
615 // populate the stack trace and return it. | |
616 java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(exc); | |
617 return exc; | |
618 } | |
619 } | |
620 | |
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621 intptr_t Universe::_non_oop_bits = 0; |
0 | 622 |
623 void* Universe::non_oop_word() { | |
624 // Neither the high bits nor the low bits of this value is allowed | |
625 // to look like (respectively) the high or low bits of a real oop. | |
626 // | |
627 // High and low are CPU-specific notions, but low always includes | |
628 // the low-order bit. Since oops are always aligned at least mod 4, | |
629 // setting the low-order bit will ensure that the low half of the | |
630 // word will never look like that of a real oop. | |
631 // | |
632 // Using the OS-supplied non-memory-address word (usually 0 or -1) | |
633 // will take care of the high bits, however many there are. | |
634 | |
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635 if (_non_oop_bits == 0) { |
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636 _non_oop_bits = (intptr_t)os::non_memory_address_word() | 1; |
0 | 637 } |
638 | |
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639 return (void*)_non_oop_bits; |
0 | 640 } |
641 | |
642 jint universe_init() { | |
643 assert(!Universe::_fully_initialized, "called after initialize_vtables"); | |
644 guarantee(1 << LogHeapWordSize == sizeof(HeapWord), | |
645 "LogHeapWordSize is incorrect."); | |
646 guarantee(sizeof(oop) >= sizeof(HeapWord), "HeapWord larger than oop?"); | |
647 guarantee(sizeof(oop) % sizeof(HeapWord) == 0, | |
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648 "oop size is not not a multiple of HeapWord size"); |
0 | 649 TraceTime timer("Genesis", TraceStartupTime); |
650 JavaClasses::compute_hard_coded_offsets(); | |
651 | |
652 jint status = Universe::initialize_heap(); | |
653 if (status != JNI_OK) { | |
654 return status; | |
655 } | |
656 | |
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657 Metaspace::global_initialize(); |
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658 |
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659 // Create memory for metadata. Must be after initializing heap for |
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660 // DumpSharedSpaces. |
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661 ClassLoaderData::init_null_class_loader_data(); |
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662 |
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663 // We have a heap so create the Method* caches before |
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664 // Metaspace::initialize_shared_spaces() tries to populate them. |
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665 Universe::_finalizer_register_cache = new LatestMethodCache(); |
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666 Universe::_loader_addClass_cache = new LatestMethodCache(); |
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667 Universe::_pd_implies_cache = new LatestMethodCache(); |
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668 Universe::_throw_illegal_access_error_cache = new LatestMethodCache(); |
0 | 669 |
670 if (UseSharedSpaces) { | |
671 // Read the data structures supporting the shared spaces (shared | |
672 // system dictionary, symbol table, etc.). After that, access to | |
673 // the file (other than the mapped regions) is no longer needed, and | |
674 // the file is closed. Closing the file does not affect the | |
675 // currently mapped regions. | |
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676 MetaspaceShared::initialize_shared_spaces(); |
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677 StringTable::create_table(); |
0 | 678 } else { |
679 SymbolTable::create_table(); | |
680 StringTable::create_table(); | |
681 ClassLoader::create_package_info_table(); | |
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682 |
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683 if (DumpSharedSpaces) { |
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684 MetaspaceShared::prepare_for_dumping(); |
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685 } |
0 | 686 } |
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687 if (strlen(VerifySubSet) > 0) { |
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688 Universe::initialize_verify_flags(); |
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689 } |
0 | 690 |
691 return JNI_OK; | |
692 } | |
693 | |
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694 // Choose the heap base address and oop encoding mode |
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|
695 // when compressed oops are used: |
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696 // Unscaled - Use 32-bits oops without encoding when |
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697 // NarrowOopHeapBaseMin + heap_size < 4Gb |
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698 // ZeroBased - Use zero based compressed oops with encoding when |
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699 // NarrowOopHeapBaseMin + heap_size < 32Gb |
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700 // HeapBased - Use compressed oops with heap base + encoding. |
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|
701 |
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702 // 4Gb |
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703 static const uint64_t UnscaledOopHeapMax = (uint64_t(max_juint) + 1); |
642
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704 // 32Gb |
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705 // OopEncodingHeapMax == UnscaledOopHeapMax << LogMinObjAlignmentInBytes; |
642
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706 |
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707 char* Universe::preferred_heap_base(size_t heap_size, size_t alignment, NARROW_OOP_MODE mode) { |
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708 assert(is_size_aligned((size_t)OopEncodingHeapMax, alignment), "Must be"); |
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709 assert(is_size_aligned((size_t)UnscaledOopHeapMax, alignment), "Must be"); |
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710 assert(is_size_aligned(heap_size, alignment), "Must be"); |
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711 |
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712 uintx heap_base_min_address_aligned = align_size_up(HeapBaseMinAddress, alignment); |
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713 |
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714 size_t base = 0; |
642
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715 #ifdef _LP64 |
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716 if (UseCompressedOops) { |
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717 assert(mode == UnscaledNarrowOop || |
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718 mode == ZeroBasedNarrowOop || |
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719 mode == HeapBasedNarrowOop, "mode is invalid"); |
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720 const size_t total_size = heap_size + heap_base_min_address_aligned; |
922
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721 // Return specified base for the first request. |
1a81ea4b45d4
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722 if (!FLAG_IS_DEFAULT(HeapBaseMinAddress) && (mode == UnscaledNarrowOop)) { |
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723 base = heap_base_min_address_aligned; |
7982
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|
724 |
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725 // If the total size is small enough to allow UnscaledNarrowOop then |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
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|
726 // just use UnscaledNarrowOop. |
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|
727 } else if ((total_size <= OopEncodingHeapMax) && (mode != HeapBasedNarrowOop)) { |
13000
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|
728 if ((total_size <= UnscaledOopHeapMax) && (mode == UnscaledNarrowOop) && |
642
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|
729 (Universe::narrow_oop_shift() == 0)) { |
660978a2a31a
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|
730 // Use 32-bits oops without encoding and |
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|
731 // place heap's top on the 4Gb boundary |
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|
732 base = (UnscaledOopHeapMax - heap_size); |
642
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|
733 } else { |
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|
734 // Can't reserve with NarrowOopShift == 0 |
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|
735 Universe::set_narrow_oop_shift(LogMinObjAlignmentInBytes); |
13000
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|
736 |
642
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737 if (mode == UnscaledNarrowOop || |
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|
738 mode == ZeroBasedNarrowOop && total_size <= UnscaledOopHeapMax) { |
209aa13ab8c0
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|
739 |
642
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|
740 // Use zero based compressed oops with encoding and |
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|
741 // place heap's top on the 32Gb boundary in case |
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742 // total_size > 4Gb or failed to reserve below 4Gb. |
13000
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743 uint64_t heap_top = OopEncodingHeapMax; |
209aa13ab8c0
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|
744 |
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|
745 // For small heaps, save some space for compressed class pointer |
209aa13ab8c0
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|
746 // space so it can be decoded with no base. |
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|
747 if (UseCompressedClassPointers && !UseSharedSpaces && |
209aa13ab8c0
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|
748 OopEncodingHeapMax <= 32*G) { |
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|
749 |
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|
750 uint64_t class_space = align_size_up(CompressedClassSpaceSize, alignment); |
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|
751 assert(is_size_aligned((size_t)OopEncodingHeapMax-class_space, |
209aa13ab8c0
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|
752 alignment), "difference must be aligned too"); |
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|
753 uint64_t new_top = OopEncodingHeapMax-class_space; |
209aa13ab8c0
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|
754 |
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|
755 if (total_size <= new_top) { |
209aa13ab8c0
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|
756 heap_top = new_top; |
209aa13ab8c0
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|
757 } |
209aa13ab8c0
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|
758 } |
209aa13ab8c0
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|
759 |
209aa13ab8c0
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|
760 // Align base to the adjusted top of the heap |
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|
761 base = heap_top - heap_size; |
642
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|
762 } |
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|
763 } |
660978a2a31a
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|
764 } else { |
7982
10d5f25a7c67
8000968: NPG: UseCompressedKlassPointers asserts with ObjectAlignmentInBytes for > 32G CompressedOops
hseigel
parents:
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diff
changeset
|
765 // UnscaledNarrowOop encoding didn't work, and no base was found for ZeroBasedOops or |
10d5f25a7c67
8000968: NPG: UseCompressedKlassPointers asserts with ObjectAlignmentInBytes for > 32G CompressedOops
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|
766 // HeapBasedNarrowOop encoding was requested. So, can't reserve below 32Gb. |
642
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|
767 Universe::set_narrow_oop_shift(LogMinObjAlignmentInBytes); |
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|
768 } |
7982
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8000968: NPG: UseCompressedKlassPointers asserts with ObjectAlignmentInBytes for > 32G CompressedOops
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diff
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|
769 |
1057
f334aec453a1
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diff
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|
770 // Set narrow_oop_base and narrow_oop_use_implicit_null_checks |
f334aec453a1
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|
771 // used in ReservedHeapSpace() constructors. |
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|
772 // The final values will be set in initialize_heap() below. |
12056
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|
773 if ((base != 0) && ((base + heap_size) <= OopEncodingHeapMax)) { |
1057
f334aec453a1
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diff
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|
774 // Use zero based compressed oops |
f334aec453a1
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|
775 Universe::set_narrow_oop_base(NULL); |
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|
776 // Don't need guard page for implicit checks in indexed |
f334aec453a1
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|
777 // addressing mode with zero based Compressed Oops. |
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|
778 Universe::set_narrow_oop_use_implicit_null_checks(true); |
f334aec453a1
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|
779 } else { |
f334aec453a1
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|
780 // Set to a non-NULL value so the ReservedSpace ctor computes |
f334aec453a1
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diff
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|
781 // the correct no-access prefix. |
f334aec453a1
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|
782 // The final value will be set in initialize_heap() below. |
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|
783 Universe::set_narrow_oop_base((address)UnscaledOopHeapMax); |
14411 | 784 #if defined(_WIN64) || defined(AIX) |
1057
f334aec453a1
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diff
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|
785 if (UseLargePages) { |
f334aec453a1
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diff
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|
786 // Cannot allocate guard pages for implicit checks in indexed |
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diff
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|
787 // addressing mode when large pages are specified on windows. |
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diff
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|
788 Universe::set_narrow_oop_use_implicit_null_checks(false); |
f334aec453a1
6896084: VM does not reserve protected page below heap for compressed oops implicit null checks
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789 } |
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|
790 #endif // _WIN64 |
f334aec453a1
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|
791 } |
642
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|
792 } |
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|
793 #endif |
12110
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|
794 |
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8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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|
795 assert(is_ptr_aligned((char*)base, alignment), "Must be"); |
1057
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796 return (char*)base; // also return NULL (don't care) for 32-bit VM |
642
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|
797 } |
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|
798 |
0 | 799 jint Universe::initialize_heap() { |
800 | |
801 if (UseParallelGC) { | |
8001
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|
802 #if INCLUDE_ALL_GCS |
0 | 803 Universe::_collectedHeap = new ParallelScavengeHeap(); |
8001
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diff
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|
804 #else // INCLUDE_ALL_GCS |
6854
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6751
diff
changeset
|
805 fatal("UseParallelGC not supported in this VM."); |
8001
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8005915: Unify SERIALGC and INCLUDE_ALTERNATE_GCS
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|
806 #endif // INCLUDE_ALL_GCS |
0 | 807 |
342
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808 } else if (UseG1GC) { |
8001
db9981fd3124
8005915: Unify SERIALGC and INCLUDE_ALTERNATE_GCS
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|
809 #if INCLUDE_ALL_GCS |
20655
b840813adfcc
8065305: Make it possible to extend the G1CollectorPolicy
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diff
changeset
|
810 G1CollectorPolicyExt* g1p = new G1CollectorPolicyExt(); |
13060
8f07aa079343
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13059
diff
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|
811 g1p->initialize_all(); |
342
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|
812 G1CollectedHeap* g1h = new G1CollectedHeap(g1p); |
37f87013dfd8
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813 Universe::_collectedHeap = g1h; |
8001
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8005915: Unify SERIALGC and INCLUDE_ALTERNATE_GCS
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|
814 #else // INCLUDE_ALL_GCS |
342
37f87013dfd8
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|
815 fatal("UseG1GC not supported in java kernel vm."); |
8001
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|
816 #endif // INCLUDE_ALL_GCS |
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817 |
0 | 818 } else { |
819 GenCollectorPolicy *gc_policy; | |
820 | |
821 if (UseSerialGC) { | |
822 gc_policy = new MarkSweepPolicy(); | |
823 } else if (UseConcMarkSweepGC) { | |
8001
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824 #if INCLUDE_ALL_GCS |
0 | 825 if (UseAdaptiveSizePolicy) { |
826 gc_policy = new ASConcurrentMarkSweepPolicy(); | |
827 } else { | |
828 gc_policy = new ConcurrentMarkSweepPolicy(); | |
829 } | |
8001
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830 #else // INCLUDE_ALL_GCS |
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831 fatal("UseConcMarkSweepGC not supported in this VM."); |
8001
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832 #endif // INCLUDE_ALL_GCS |
0 | 833 } else { // default old generation |
834 gc_policy = new MarkSweepPolicy(); | |
835 } | |
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836 gc_policy->initialize_all(); |
0 | 837 |
838 Universe::_collectedHeap = new GenCollectedHeap(gc_policy); | |
839 } | |
840 | |
17727 | 841 ThreadLocalAllocBuffer::set_max_size(Universe::heap()->max_tlab_size()); |
842 | |
0 | 843 jint status = Universe::heap()->initialize(); |
844 if (status != JNI_OK) { | |
845 return status; | |
846 } | |
642
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847 |
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848 #ifdef _LP64 |
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849 if (UseCompressedOops) { |
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850 // Subtract a page because something can get allocated at heap base. |
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851 // This also makes implicit null checking work, because the |
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852 // memory+1 page below heap_base needs to cause a signal. |
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853 // See needs_explicit_null_check. |
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854 // Only set the heap base for compressed oops because it indicates |
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855 // compressed oops for pstack code. |
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856 if (((uint64_t)Universe::heap()->reserved_region().end() > OopEncodingHeapMax)) { |
642
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857 // Can't reserve heap below 32Gb. |
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858 // keep the Universe::narrow_oop_base() set in Universe::reserve_heap() |
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859 Universe::set_narrow_oop_shift(LogMinObjAlignmentInBytes); |
14411 | 860 #ifdef AIX |
861 // There is no protected page before the heap. This assures all oops | |
862 // are decoded so that NULL is preserved, so this page will not be accessed. | |
863 Universe::set_narrow_oop_use_implicit_null_checks(false); | |
864 #endif | |
642
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865 } else { |
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866 Universe::set_narrow_oop_base(0); |
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867 #ifdef _WIN64 |
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868 if (!Universe::narrow_oop_use_implicit_null_checks()) { |
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869 // Don't need guard page for implicit checks in indexed addressing |
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870 // mode with zero based Compressed Oops. |
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871 Universe::set_narrow_oop_use_implicit_null_checks(true); |
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872 } |
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873 #endif // _WIN64 |
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874 if((uint64_t)Universe::heap()->reserved_region().end() > UnscaledOopHeapMax) { |
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875 // Can't reserve heap below 4Gb. |
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876 Universe::set_narrow_oop_shift(LogMinObjAlignmentInBytes); |
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877 } else { |
922
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878 Universe::set_narrow_oop_shift(0); |
642
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879 } |
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880 } |
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881 |
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882 Universe::set_narrow_ptrs_base(Universe::narrow_oop_base()); |
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883 |
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884 if (PrintCompressedOopsMode || (PrintMiscellaneous && Verbose)) { |
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885 Universe::print_compressed_oops_mode(); |
642
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886 } |
113
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887 } |
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888 // Universe::narrow_oop_base() is one page below the heap. |
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889 assert((intptr_t)Universe::narrow_oop_base() <= (intptr_t)(Universe::heap()->base() - |
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890 os::vm_page_size()) || |
642
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891 Universe::narrow_oop_base() == NULL, "invalid value"); |
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892 assert(Universe::narrow_oop_shift() == LogMinObjAlignmentInBytes || |
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893 Universe::narrow_oop_shift() == 0, "invalid value"); |
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894 #endif |
0 | 895 |
896 // We will never reach the CATCH below since Exceptions::_throw will cause | |
897 // the VM to exit if an exception is thrown during initialization | |
898 | |
899 if (UseTLAB) { | |
900 assert(Universe::heap()->supports_tlab_allocation(), | |
901 "Should support thread-local allocation buffers"); | |
902 ThreadLocalAllocBuffer::startup_initialization(); | |
903 } | |
904 return JNI_OK; | |
905 } | |
906 | |
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907 void Universe::print_compressed_oops_mode() { |
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908 tty->cr(); |
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909 tty->print("heap address: " PTR_FORMAT ", size: " SIZE_FORMAT " MB", |
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910 Universe::heap()->base(), Universe::heap()->reserved_region().byte_size()/M); |
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911 |
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|
912 tty->print(", Compressed Oops mode: %s", narrow_oop_mode_to_string(narrow_oop_mode())); |
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913 |
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914 if (Universe::narrow_oop_base() != 0) { |
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|
915 tty->print(":" PTR_FORMAT, Universe::narrow_oop_base()); |
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|
916 } |
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917 |
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|
918 if (Universe::narrow_oop_shift() != 0) { |
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919 tty->print(", Oop shift amount: %d", Universe::narrow_oop_shift()); |
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|
920 } |
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|
921 |
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|
922 tty->cr(); |
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|
923 tty->cr(); |
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|
924 } |
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925 |
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926 // Reserve the Java heap, which is now the same for all GCs. |
da91efe96a93
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927 ReservedSpace Universe::reserve_heap(size_t heap_size, size_t alignment) { |
12233
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|
928 assert(alignment <= Arguments::conservative_max_heap_alignment(), |
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8010722: assert: failed: heap size is too big for compressed oops
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|
929 err_msg("actual alignment "SIZE_FORMAT" must be within maximum heap alignment "SIZE_FORMAT, |
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|
930 alignment, Arguments::conservative_max_heap_alignment())); |
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|
931 size_t total_reserved = align_size_up(heap_size, alignment); |
8741
eac371996b44
8001049: VM crashes when running with large -Xms and not specifying ObjectAlignmentInBytes
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diff
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|
932 assert(!UseCompressedOops || (total_reserved <= (OopEncodingHeapMax - os::vm_page_size())), |
eac371996b44
8001049: VM crashes when running with large -Xms and not specifying ObjectAlignmentInBytes
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|
933 "heap size is too big for compressed oops"); |
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934 |
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|
935 bool use_large_pages = UseLargePages && is_size_aligned(alignment, os::large_page_size()); |
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|
936 assert(!UseLargePages |
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8024396: VM crashing with assert(!UseLargePages || UseParallelOldGC || use_large_pages) failed: Wrong alignment to use large pages
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|
937 || UseParallelGC |
12110
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938 || use_large_pages, "Wrong alignment to use large pages"); |
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|
939 |
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|
940 char* addr = Universe::preferred_heap_base(total_reserved, alignment, Universe::UnscaledNarrowOop); |
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|
941 |
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|
942 ReservedHeapSpace total_rs(total_reserved, alignment, use_large_pages, addr); |
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943 |
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944 if (UseCompressedOops) { |
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945 if (addr != NULL && !total_rs.is_reserved()) { |
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946 // Failed to reserve at specified address - the requested memory |
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|
947 // region is taken already, for example, by 'java' launcher. |
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|
948 // Try again to reserver heap higher. |
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|
949 addr = Universe::preferred_heap_base(total_reserved, alignment, Universe::ZeroBasedNarrowOop); |
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950 |
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951 ReservedHeapSpace total_rs0(total_reserved, alignment, |
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|
952 use_large_pages, addr); |
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|
953 |
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954 if (addr != NULL && !total_rs0.is_reserved()) { |
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955 // Failed to reserve at specified address again - give up. |
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|
956 addr = Universe::preferred_heap_base(total_reserved, alignment, Universe::HeapBasedNarrowOop); |
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|
957 assert(addr == NULL, ""); |
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|
958 |
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959 ReservedHeapSpace total_rs1(total_reserved, alignment, |
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|
960 use_large_pages, addr); |
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961 total_rs = total_rs1; |
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|
962 } else { |
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|
963 total_rs = total_rs0; |
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|
964 } |
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965 } |
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|
966 } |
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|
967 |
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|
968 if (!total_rs.is_reserved()) { |
10358
0def34ab1c98
8015007: Incorrect print format in error message for VM cannot allocate the requested heap
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10265
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|
969 vm_exit_during_initialization(err_msg("Could not reserve enough space for " SIZE_FORMAT "KB object heap", total_reserved/K)); |
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970 return total_rs; |
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971 } |
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972 |
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973 if (UseCompressedOops) { |
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974 // Universe::initialize_heap() will reset this to NULL if unscaled |
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975 // or zero-based narrow oops are actually used. |
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976 address base = (address)(total_rs.base() - os::vm_page_size()); |
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977 Universe::set_narrow_oop_base(base); |
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978 } |
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979 return total_rs; |
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980 } |
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981 |
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982 |
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983 // It's the caller's responsibility to ensure glitch-freedom |
0 | 984 // (if required). |
985 void Universe::update_heap_info_at_gc() { | |
986 _heap_capacity_at_last_gc = heap()->capacity(); | |
987 _heap_used_at_last_gc = heap()->used(); | |
988 } | |
989 | |
990 | |
10405 | 991 const char* Universe::narrow_oop_mode_to_string(Universe::NARROW_OOP_MODE mode) { |
992 switch (mode) { | |
993 case UnscaledNarrowOop: | |
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994 return "32-bit"; |
10405 | 995 case ZeroBasedNarrowOop: |
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996 return "Zero based"; |
10405 | 997 case HeapBasedNarrowOop: |
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998 return "Non-zero based"; |
10405 | 999 } |
1000 | |
1001 ShouldNotReachHere(); | |
1002 return ""; | |
1003 } | |
1004 | |
1005 | |
1006 Universe::NARROW_OOP_MODE Universe::narrow_oop_mode() { | |
1007 if (narrow_oop_base() != 0) { | |
1008 return HeapBasedNarrowOop; | |
1009 } | |
1010 | |
1011 if (narrow_oop_shift() != 0) { | |
1012 return ZeroBasedNarrowOop; | |
1013 } | |
1014 | |
1015 return UnscaledNarrowOop; | |
1016 } | |
1017 | |
0 | 1018 |
1019 void universe2_init() { | |
1020 EXCEPTION_MARK; | |
1021 Universe::genesis(CATCH); | |
1022 } | |
1023 | |
1024 | |
1025 // This function is defined in JVM.cpp | |
1026 extern void initialize_converter_functions(); | |
1027 | |
1028 bool universe_post_init() { | |
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1029 assert(!is_init_completed(), "Error: initialization not yet completed!"); |
0 | 1030 Universe::_fully_initialized = true; |
1031 EXCEPTION_MARK; | |
1032 { ResourceMark rm; | |
1033 Interpreter::initialize(); // needed for interpreter entry points | |
1034 if (!UseSharedSpaces) { | |
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1035 HandleMark hm(THREAD); |
1142 | 1036 KlassHandle ok_h(THREAD, SystemDictionary::Object_klass()); |
0 | 1037 Universe::reinitialize_vtable_of(ok_h, CHECK_false); |
1038 Universe::reinitialize_itables(CHECK_false); | |
1039 } | |
1040 } | |
1041 | |
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1042 HandleMark hm(THREAD); |
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1043 Klass* k; |
0 | 1044 instanceKlassHandle k_h; |
1045 // Setup preallocated empty java.lang.Class array | |
1142 | 1046 Universe::_the_empty_class_klass_array = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_false); |
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1047 |
0 | 1048 // Setup preallocated OutOfMemoryError errors |
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1049 k = SystemDictionary::resolve_or_fail(vmSymbols::java_lang_OutOfMemoryError(), true, CHECK_false); |
0 | 1050 k_h = instanceKlassHandle(THREAD, k); |
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1051 Universe::_out_of_memory_error_java_heap = k_h->allocate_instance(CHECK_false); |
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1052 Universe::_out_of_memory_error_metaspace = k_h->allocate_instance(CHECK_false); |
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1053 Universe::_out_of_memory_error_class_metaspace = k_h->allocate_instance(CHECK_false); |
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1054 Universe::_out_of_memory_error_array_size = k_h->allocate_instance(CHECK_false); |
0 | 1055 Universe::_out_of_memory_error_gc_overhead_limit = |
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1056 k_h->allocate_instance(CHECK_false); |
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1057 Universe::_out_of_memory_error_realloc_objects = k_h->allocate_instance(CHECK_false); |
0 | 1058 |
1059 // Setup preallocated NullPointerException | |
1060 // (this is currently used for a cheap & dirty solution in compiler exception handling) | |
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1061 k = SystemDictionary::resolve_or_fail(vmSymbols::java_lang_NullPointerException(), true, CHECK_false); |
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1062 Universe::_null_ptr_exception_instance = InstanceKlass::cast(k)->allocate_instance(CHECK_false); |
0 | 1063 // Setup preallocated ArithmeticException |
1064 // (this is currently used for a cheap & dirty solution in compiler exception handling) | |
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1065 k = SystemDictionary::resolve_or_fail(vmSymbols::java_lang_ArithmeticException(), true, CHECK_false); |
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1066 Universe::_arithmetic_exception_instance = InstanceKlass::cast(k)->allocate_instance(CHECK_false); |
0 | 1067 // Virtual Machine Error for when we get into a situation we can't resolve |
1068 k = SystemDictionary::resolve_or_fail( | |
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1069 vmSymbols::java_lang_VirtualMachineError(), true, CHECK_false); |
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1070 bool linked = InstanceKlass::cast(k)->link_class_or_fail(CHECK_false); |
0 | 1071 if (!linked) { |
1072 tty->print_cr("Unable to link/verify VirtualMachineError class"); | |
1073 return false; // initialization failed | |
1074 } | |
1075 Universe::_virtual_machine_error_instance = | |
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1076 InstanceKlass::cast(k)->allocate_instance(CHECK_false); |
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1077 |
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1078 Universe::_vm_exception = InstanceKlass::cast(k)->allocate_instance(CHECK_false); |
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1079 |
0 | 1080 if (!DumpSharedSpaces) { |
1081 // These are the only Java fields that are currently set during shared space dumping. | |
1082 // We prefer to not handle this generally, so we always reinitialize these detail messages. | |
1083 Handle msg = java_lang_String::create_from_str("Java heap space", CHECK_false); | |
1084 java_lang_Throwable::set_message(Universe::_out_of_memory_error_java_heap, msg()); | |
1085 | |
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1086 msg = java_lang_String::create_from_str("Metaspace", CHECK_false); |
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1087 java_lang_Throwable::set_message(Universe::_out_of_memory_error_metaspace, msg()); |
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1088 msg = java_lang_String::create_from_str("Compressed class space", CHECK_false); |
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1089 java_lang_Throwable::set_message(Universe::_out_of_memory_error_class_metaspace, msg()); |
0 | 1090 |
1091 msg = java_lang_String::create_from_str("Requested array size exceeds VM limit", CHECK_false); | |
1092 java_lang_Throwable::set_message(Universe::_out_of_memory_error_array_size, msg()); | |
1093 | |
1094 msg = java_lang_String::create_from_str("GC overhead limit exceeded", CHECK_false); | |
1095 java_lang_Throwable::set_message(Universe::_out_of_memory_error_gc_overhead_limit, msg()); | |
1096 | |
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1097 msg = java_lang_String::create_from_str("Java heap space: failed reallocation of scalar replaced objects", CHECK_false); |
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1098 java_lang_Throwable::set_message(Universe::_out_of_memory_error_realloc_objects, msg()); |
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1099 |
0 | 1100 msg = java_lang_String::create_from_str("/ by zero", CHECK_false); |
1101 java_lang_Throwable::set_message(Universe::_arithmetic_exception_instance, msg()); | |
1102 | |
1103 // Setup the array of errors that have preallocated backtrace | |
1104 k = Universe::_out_of_memory_error_java_heap->klass(); | |
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1105 assert(k->name() == vmSymbols::java_lang_OutOfMemoryError(), "should be out of memory error"); |
0 | 1106 k_h = instanceKlassHandle(THREAD, k); |
1107 | |
1108 int len = (StackTraceInThrowable) ? (int)PreallocatedOutOfMemoryErrorCount : 0; | |
1109 Universe::_preallocated_out_of_memory_error_array = oopFactory::new_objArray(k_h(), len, CHECK_false); | |
1110 for (int i=0; i<len; i++) { | |
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1111 oop err = k_h->allocate_instance(CHECK_false); |
0 | 1112 Handle err_h = Handle(THREAD, err); |
1113 java_lang_Throwable::allocate_backtrace(err_h, CHECK_false); | |
1114 Universe::preallocated_out_of_memory_errors()->obj_at_put(i, err_h()); | |
1115 } | |
1116 Universe::_preallocated_out_of_memory_error_avail_count = (jint)len; | |
1117 } | |
1118 | |
1119 | |
1120 // Setup static method for registering finalizers | |
1121 // The finalizer klass must be linked before looking up the method, in | |
1122 // case it needs to get rewritten. | |
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1123 InstanceKlass::cast(SystemDictionary::Finalizer_klass())->link_class(CHECK_false); |
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1124 Method* m = InstanceKlass::cast(SystemDictionary::Finalizer_klass())->find_method( |
0 | 1125 vmSymbols::register_method_name(), |
1126 vmSymbols::register_method_signature()); | |
1127 if (m == NULL || !m->is_static()) { | |
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1128 tty->print_cr("Unable to link/verify Finalizer.register method"); |
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1129 return false; // initialization failed (cannot throw exception yet) |
0 | 1130 } |
1131 Universe::_finalizer_register_cache->init( | |
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1132 SystemDictionary::Finalizer_klass(), m); |
0 | 1133 |
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1134 InstanceKlass::cast(SystemDictionary::misc_Unsafe_klass())->link_class(CHECK_false); |
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1135 m = InstanceKlass::cast(SystemDictionary::misc_Unsafe_klass())->find_method( |
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1136 vmSymbols::throwIllegalAccessError_name(), |
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1137 vmSymbols::void_method_signature()); |
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1138 if (m != NULL && !m->is_static()) { |
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1139 // Note null is okay; this method is used in itables, and if it is null, |
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1140 // then AbstractMethodError is thrown instead. |
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1141 tty->print_cr("Unable to link/verify Unsafe.throwIllegalAccessError method"); |
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1142 return false; // initialization failed (cannot throw exception yet) |
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1143 } |
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1144 Universe::_throw_illegal_access_error_cache->init( |
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1145 SystemDictionary::misc_Unsafe_klass(), m); |
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1146 |
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1147 // Setup method for registering loaded classes in class loader vector |
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1148 InstanceKlass::cast(SystemDictionary::ClassLoader_klass())->link_class(CHECK_false); |
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1149 m = InstanceKlass::cast(SystemDictionary::ClassLoader_klass())->find_method(vmSymbols::addClass_name(), vmSymbols::class_void_signature()); |
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1150 if (m == NULL || m->is_static()) { |
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1151 tty->print_cr("Unable to link/verify ClassLoader.addClass method"); |
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1152 return false; // initialization failed (cannot throw exception yet) |
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1153 } |
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1154 Universe::_loader_addClass_cache->init( |
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1155 SystemDictionary::ClassLoader_klass(), m); |
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1156 |
11010 | 1157 // Setup method for checking protection domain |
1158 InstanceKlass::cast(SystemDictionary::ProtectionDomain_klass())->link_class(CHECK_false); | |
1159 m = InstanceKlass::cast(SystemDictionary::ProtectionDomain_klass())-> | |
1160 find_method(vmSymbols::impliesCreateAccessControlContext_name(), | |
1161 vmSymbols::void_boolean_signature()); | |
1162 // Allow NULL which should only happen with bootstrapping. | |
1163 if (m != NULL) { | |
1164 if (m->is_static()) { | |
1165 // NoSuchMethodException doesn't actually work because it tries to run the | |
1166 // <init> function before java_lang_Class is linked. Print error and exit. | |
1167 tty->print_cr("ProtectionDomain.impliesCreateAccessControlContext() has the wrong linkage"); | |
1168 return false; // initialization failed | |
1169 } | |
1170 Universe::_pd_implies_cache->init( | |
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1171 SystemDictionary::ProtectionDomain_klass(), m); |
11010 | 1172 } |
1173 | |
0 | 1174 // The folowing is initializing converter functions for serialization in |
1175 // JVM.cpp. If we clean up the StrictMath code above we may want to find | |
1176 // a better solution for this as well. | |
1177 initialize_converter_functions(); | |
1178 | |
1179 // This needs to be done before the first scavenge/gc, since | |
1180 // it's an input to soft ref clearing policy. | |
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1181 { |
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1182 MutexLocker x(Heap_lock); |
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1183 Universe::update_heap_info_at_gc(); |
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1184 } |
0 | 1185 |
1186 // ("weak") refs processing infrastructure initialization | |
1187 Universe::heap()->post_initialize(); | |
1188 | |
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1189 // Initialize performance counters for metaspaces |
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1190 MetaspaceCounters::initialize_performance_counters(); |
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1191 CompressedClassSpaceCounters::initialize_performance_counters(); |
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1192 |
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1193 MemoryService::add_metaspace_memory_pools(); |
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1194 |
0 | 1195 MemoryService::set_universe_heap(Universe::_collectedHeap); |
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1196 #if INCLUDE_CDS |
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1197 if (UseSharedSpaces) { |
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1198 SharedClassUtil::initialize(CHECK_false); |
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1199 } |
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1200 #endif |
0 | 1201 return true; |
1202 } | |
1203 | |
1204 | |
1205 void Universe::compute_base_vtable_size() { | |
1206 _base_vtable_size = ClassLoader::compute_Object_vtable(); | |
1207 } | |
1208 | |
1209 | |
1210 // %%% The Universe::flush_foo methods belong in CodeCache. | |
1211 | |
1212 // Flushes compiled methods dependent on dependee. | |
1213 void Universe::flush_dependents_on(instanceKlassHandle dependee) { | |
1214 assert_lock_strong(Compile_lock); | |
1215 | |
1216 if (CodeCache::number_of_nmethods_with_dependencies() == 0) return; | |
1217 | |
1218 // CodeCache can only be updated by a thread_in_VM and they will all be | |
1219 // stopped dring the safepoint so CodeCache will be safe to update without | |
1220 // holding the CodeCache_lock. | |
1221 | |
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1222 KlassDepChange changes(dependee); |
0 | 1223 |
1224 // Compute the dependent nmethods | |
1225 if (CodeCache::mark_for_deoptimization(changes) > 0) { | |
1226 // At least one nmethod has been marked for deoptimization | |
1227 VM_Deoptimize op; | |
1228 VMThread::execute(&op); | |
1229 } | |
1230 } | |
1231 | |
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1232 // Flushes compiled methods dependent on a particular CallSite |
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1233 // instance when its target is different than the given MethodHandle. |
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1234 void Universe::flush_dependents_on(Handle call_site, Handle method_handle) { |
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1235 assert_lock_strong(Compile_lock); |
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1236 |
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1237 if (CodeCache::number_of_nmethods_with_dependencies() == 0) return; |
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1238 |
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1239 // CodeCache can only be updated by a thread_in_VM and they will all be |
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1240 // stopped dring the safepoint so CodeCache will be safe to update without |
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1241 // holding the CodeCache_lock. |
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1242 |
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1243 CallSiteDepChange changes(call_site(), method_handle()); |
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1244 |
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1245 // Compute the dependent nmethods that have a reference to a |
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1246 // CallSite object. We use InstanceKlass::mark_dependent_nmethod |
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1247 // directly instead of CodeCache::mark_for_deoptimization because we |
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1248 // want dependents on the call site class only not all classes in |
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1249 // the ContextStream. |
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1250 int marked = 0; |
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1251 { |
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1252 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); |
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1253 InstanceKlass* call_site_klass = InstanceKlass::cast(call_site->klass()); |
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1254 marked = call_site_klass->mark_dependent_nmethods(changes); |
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1255 } |
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1256 if (marked > 0) { |
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1257 // At least one nmethod has been marked for deoptimization |
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1258 VM_Deoptimize op; |
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1259 VMThread::execute(&op); |
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1260 } |
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1261 } |
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1262 |
0 | 1263 #ifdef HOTSWAP |
1264 // Flushes compiled methods dependent on dependee in the evolutionary sense | |
1265 void Universe::flush_evol_dependents_on(instanceKlassHandle ev_k_h) { | |
1266 // --- Compile_lock is not held. However we are at a safepoint. | |
1267 assert_locked_or_safepoint(Compile_lock); | |
1268 if (CodeCache::number_of_nmethods_with_dependencies() == 0) return; | |
1269 | |
1270 // CodeCache can only be updated by a thread_in_VM and they will all be | |
1271 // stopped dring the safepoint so CodeCache will be safe to update without | |
1272 // holding the CodeCache_lock. | |
1273 | |
1274 // Compute the dependent nmethods | |
1275 if (CodeCache::mark_for_evol_deoptimization(ev_k_h) > 0) { | |
1276 // At least one nmethod has been marked for deoptimization | |
1277 | |
1278 // All this already happens inside a VM_Operation, so we'll do all the work here. | |
1279 // Stuff copied from VM_Deoptimize and modified slightly. | |
1280 | |
1281 // We do not want any GCs to happen while we are in the middle of this VM operation | |
1282 ResourceMark rm; | |
1283 DeoptimizationMarker dm; | |
1284 | |
1285 // Deoptimize all activations depending on marked nmethods | |
1286 Deoptimization::deoptimize_dependents(); | |
1287 | |
1288 // Make the dependent methods not entrant (in VM_Deoptimize they are made zombies) | |
1289 CodeCache::make_marked_nmethods_not_entrant(); | |
1290 } | |
1291 } | |
1292 #endif // HOTSWAP | |
1293 | |
1294 | |
1295 // Flushes compiled methods dependent on dependee | |
1296 void Universe::flush_dependents_on_method(methodHandle m_h) { | |
1297 // --- Compile_lock is not held. However we are at a safepoint. | |
1298 assert_locked_or_safepoint(Compile_lock); | |
1299 | |
1300 // CodeCache can only be updated by a thread_in_VM and they will all be | |
1301 // stopped dring the safepoint so CodeCache will be safe to update without | |
1302 // holding the CodeCache_lock. | |
1303 | |
1304 // Compute the dependent nmethods | |
1305 if (CodeCache::mark_for_deoptimization(m_h()) > 0) { | |
1306 // At least one nmethod has been marked for deoptimization | |
1307 | |
1308 // All this already happens inside a VM_Operation, so we'll do all the work here. | |
1309 // Stuff copied from VM_Deoptimize and modified slightly. | |
1310 | |
1311 // We do not want any GCs to happen while we are in the middle of this VM operation | |
1312 ResourceMark rm; | |
1313 DeoptimizationMarker dm; | |
1314 | |
1315 // Deoptimize all activations depending on marked nmethods | |
1316 Deoptimization::deoptimize_dependents(); | |
1317 | |
1318 // Make the dependent methods not entrant (in VM_Deoptimize they are made zombies) | |
1319 CodeCache::make_marked_nmethods_not_entrant(); | |
1320 } | |
1321 } | |
1322 | |
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1323 void Universe::print() { |
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1324 print_on(gclog_or_tty); |
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1325 } |
0 | 1326 |
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1327 void Universe::print_on(outputStream* st, bool extended) { |
0 | 1328 st->print_cr("Heap"); |
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1329 if (!extended) { |
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1330 heap()->print_on(st); |
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1331 } else { |
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1332 heap()->print_extended_on(st); |
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1333 } |
0 | 1334 } |
1335 | |
1336 void Universe::print_heap_at_SIGBREAK() { | |
1337 if (PrintHeapAtSIGBREAK) { | |
1338 MutexLocker hl(Heap_lock); | |
1339 print_on(tty); | |
1340 tty->cr(); | |
1341 tty->flush(); | |
1342 } | |
1343 } | |
1344 | |
4944 | 1345 void Universe::print_heap_before_gc(outputStream* st, bool ignore_extended) { |
0 | 1346 st->print_cr("{Heap before GC invocations=%u (full %u):", |
1347 heap()->total_collections(), | |
1348 heap()->total_full_collections()); | |
4944 | 1349 if (!PrintHeapAtGCExtended || ignore_extended) { |
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1350 heap()->print_on(st); |
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1351 } else { |
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1352 heap()->print_extended_on(st); |
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1353 } |
0 | 1354 } |
1355 | |
4944 | 1356 void Universe::print_heap_after_gc(outputStream* st, bool ignore_extended) { |
0 | 1357 st->print_cr("Heap after GC invocations=%u (full %u):", |
1358 heap()->total_collections(), | |
1359 heap()->total_full_collections()); | |
4944 | 1360 if (!PrintHeapAtGCExtended || ignore_extended) { |
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1361 heap()->print_on(st); |
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1362 } else { |
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1363 heap()->print_extended_on(st); |
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1364 } |
0 | 1365 st->print_cr("}"); |
1366 } | |
1367 | |
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1368 void Universe::initialize_verify_flags() { |
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1369 verify_flags = 0; |
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1370 const char delimiter[] = " ,"; |
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1371 |
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1372 size_t length = strlen(VerifySubSet); |
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1373 char* subset_list = NEW_C_HEAP_ARRAY(char, length + 1, mtInternal); |
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1374 strncpy(subset_list, VerifySubSet, length + 1); |
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1375 |
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1376 char* token = strtok(subset_list, delimiter); |
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1377 while (token != NULL) { |
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1378 if (strcmp(token, "threads") == 0) { |
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1379 verify_flags |= Verify_Threads; |
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1380 } else if (strcmp(token, "heap") == 0) { |
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1381 verify_flags |= Verify_Heap; |
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1382 } else if (strcmp(token, "symbol_table") == 0) { |
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1383 verify_flags |= Verify_SymbolTable; |
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1384 } else if (strcmp(token, "string_table") == 0) { |
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1385 verify_flags |= Verify_StringTable; |
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1386 } else if (strcmp(token, "codecache") == 0) { |
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1387 verify_flags |= Verify_CodeCache; |
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1388 } else if (strcmp(token, "dictionary") == 0) { |
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1389 verify_flags |= Verify_SystemDictionary; |
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1390 } else if (strcmp(token, "classloader_data_graph") == 0) { |
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1391 verify_flags |= Verify_ClassLoaderDataGraph; |
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1392 } else if (strcmp(token, "metaspace") == 0) { |
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1393 verify_flags |= Verify_MetaspaceAux; |
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1394 } else if (strcmp(token, "jni_handles") == 0) { |
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1395 verify_flags |= Verify_JNIHandles; |
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1396 } else if (strcmp(token, "c-heap") == 0) { |
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1397 verify_flags |= Verify_CHeap; |
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1398 } else if (strcmp(token, "codecache_oops") == 0) { |
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1399 verify_flags |= Verify_CodeCacheOops; |
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1400 } else { |
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1401 vm_exit_during_initialization(err_msg("VerifySubSet: \'%s\' memory sub-system is unknown, please correct it", token)); |
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1402 } |
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1403 token = strtok(NULL, delimiter); |
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1404 } |
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1405 FREE_C_HEAP_ARRAY(char, subset_list, mtInternal); |
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1406 } |
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1407 |
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1408 bool Universe::should_verify_subset(uint subset) { |
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1409 if (verify_flags & subset) { |
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1410 return true; |
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1411 } |
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1412 return false; |
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1413 } |
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1414 |
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1415 void Universe::verify(VerifyOption option, const char* prefix, bool silent) { |
0 | 1416 // The use of _verify_in_progress is a temporary work around for |
1417 // 6320749. Don't bother with a creating a class to set and clear | |
1418 // it since it is only used in this method and the control flow is | |
1419 // straight forward. | |
1420 _verify_in_progress = true; | |
1421 | |
1422 COMPILER2_PRESENT( | |
1423 assert(!DerivedPointerTable::is_active(), | |
1424 "DPT should not be active during verification " | |
1425 "(of thread stacks below)"); | |
1426 ) | |
1427 | |
1428 ResourceMark rm; | |
1429 HandleMark hm; // Handles created during verification can be zapped | |
1430 _verify_count++; | |
1431 | |
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1432 if (!silent) gclog_or_tty->print("%s", prefix); |
0 | 1433 if (!silent) gclog_or_tty->print("[Verifying "); |
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1434 if (should_verify_subset(Verify_Threads)) { |
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1435 if (!silent) gclog_or_tty->print("Threads "); |
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1436 Threads::verify(); |
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1437 } |
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1438 if (should_verify_subset(Verify_Heap)) { |
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1439 if (!silent) gclog_or_tty->print("Heap "); |
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1440 heap()->verify(silent, option); |
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1441 } |
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1442 if (should_verify_subset(Verify_SymbolTable)) { |
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1443 if (!silent) gclog_or_tty->print("SymbolTable "); |
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1444 SymbolTable::verify(); |
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1445 } |
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1446 if (should_verify_subset(Verify_StringTable)) { |
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1447 if (!silent) gclog_or_tty->print("StringTable "); |
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1448 StringTable::verify(); |
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1449 } |
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1450 if (should_verify_subset(Verify_CodeCache)) { |
0 | 1451 { |
1452 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); | |
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1453 if (!silent) gclog_or_tty->print("CodeCache "); |
0 | 1454 CodeCache::verify(); |
1455 } | |
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1456 } |
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1457 if (should_verify_subset(Verify_SystemDictionary)) { |
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1458 if (!silent) gclog_or_tty->print("SystemDictionary "); |
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1459 SystemDictionary::verify(); |
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1460 } |
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1461 #ifndef PRODUCT |
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1462 if (should_verify_subset(Verify_ClassLoaderDataGraph)) { |
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1463 if (!silent) gclog_or_tty->print("ClassLoaderDataGraph "); |
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1464 ClassLoaderDataGraph::verify(); |
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1465 } |
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1466 #endif |
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1467 if (should_verify_subset(Verify_MetaspaceAux)) { |
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1468 if (!silent) gclog_or_tty->print("MetaspaceAux "); |
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1469 MetaspaceAux::verify_free_chunks(); |
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1470 } |
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1471 if (should_verify_subset(Verify_JNIHandles)) { |
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1472 if (!silent) gclog_or_tty->print("JNIHandles "); |
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1473 JNIHandles::verify(); |
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1474 } |
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1475 if (should_verify_subset(Verify_CHeap)) { |
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1476 if (!silent) gclog_or_tty->print("C-heap "); |
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1477 os::check_heap(); |
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1478 } |
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1479 if (should_verify_subset(Verify_CodeCacheOops)) { |
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1480 if (!silent) gclog_or_tty->print("CodeCache Oops "); |
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1481 CodeCache::verify_oops(); |
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1482 } |
0 | 1483 if (!silent) gclog_or_tty->print_cr("]"); |
1484 | |
1485 _verify_in_progress = false; | |
1486 } | |
1487 | |
1488 // Oop verification (see MacroAssembler::verify_oop) | |
1489 | |
1490 static uintptr_t _verify_oop_data[2] = {0, (uintptr_t)-1}; | |
1491 static uintptr_t _verify_klass_data[2] = {0, (uintptr_t)-1}; | |
1492 | |
1493 | |
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1494 #ifndef PRODUCT |
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1495 |
0 | 1496 static void calculate_verify_data(uintptr_t verify_data[2], |
1497 HeapWord* low_boundary, | |
1498 HeapWord* high_boundary) { | |
1499 assert(low_boundary < high_boundary, "bad interval"); | |
1500 | |
1501 // decide which low-order bits we require to be clear: | |
1502 size_t alignSize = MinObjAlignmentInBytes; | |
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1503 size_t min_object_size = CollectedHeap::min_fill_size(); |
0 | 1504 |
1505 // make an inclusive limit: | |
1506 uintptr_t max = (uintptr_t)high_boundary - min_object_size*wordSize; | |
1507 uintptr_t min = (uintptr_t)low_boundary; | |
1508 assert(min < max, "bad interval"); | |
1509 uintptr_t diff = max ^ min; | |
1510 | |
1511 // throw away enough low-order bits to make the diff vanish | |
1512 uintptr_t mask = (uintptr_t)(-1); | |
1513 while ((mask & diff) != 0) | |
1514 mask <<= 1; | |
1515 uintptr_t bits = (min & mask); | |
1516 assert(bits == (max & mask), "correct mask"); | |
1517 // check an intermediate value between min and max, just to make sure: | |
1518 assert(bits == ((min + (max-min)/2) & mask), "correct mask"); | |
1519 | |
1520 // require address alignment, too: | |
1521 mask |= (alignSize - 1); | |
1522 | |
1523 if (!(verify_data[0] == 0 && verify_data[1] == (uintptr_t)-1)) { | |
1524 assert(verify_data[0] == mask && verify_data[1] == bits, "mask stability"); | |
1525 } | |
1526 verify_data[0] = mask; | |
1527 verify_data[1] = bits; | |
1528 } | |
1529 | |
1530 // Oop verification (see MacroAssembler::verify_oop) | |
1531 | |
1532 uintptr_t Universe::verify_oop_mask() { | |
1533 MemRegion m = heap()->reserved_region(); | |
1534 calculate_verify_data(_verify_oop_data, | |
1535 m.start(), | |
1536 m.end()); | |
1537 return _verify_oop_data[0]; | |
1538 } | |
1539 | |
1540 | |
1541 | |
1542 uintptr_t Universe::verify_oop_bits() { | |
1543 verify_oop_mask(); | |
1544 return _verify_oop_data[1]; | |
1545 } | |
1546 | |
1547 uintptr_t Universe::verify_mark_mask() { | |
1548 return markOopDesc::lock_mask_in_place; | |
1549 } | |
1550 | |
1551 uintptr_t Universe::verify_mark_bits() { | |
1552 intptr_t mask = verify_mark_mask(); | |
1553 intptr_t bits = (intptr_t)markOopDesc::prototype(); | |
1554 assert((bits & ~mask) == 0, "no stray header bits"); | |
1555 return bits; | |
1556 } | |
1557 #endif // PRODUCT | |
1558 | |
1559 | |
1560 void Universe::compute_verify_oop_data() { | |
1561 verify_oop_mask(); | |
1562 verify_oop_bits(); | |
1563 verify_mark_mask(); | |
1564 verify_mark_bits(); | |
1565 } | |
1566 | |
1567 | |
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1568 void LatestMethodCache::init(Klass* k, Method* m) { |
0 | 1569 if (!UseSharedSpaces) { |
1570 _klass = k; | |
1571 } | |
1572 #ifndef PRODUCT | |
1573 else { | |
1574 // sharing initilization should have already set up _klass | |
1575 assert(_klass != NULL, "just checking"); | |
1576 } | |
1577 #endif | |
1578 | |
1579 _method_idnum = m->method_idnum(); | |
1580 assert(_method_idnum >= 0, "sanity check"); | |
1581 } | |
1582 | |
1583 | |
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1584 Method* LatestMethodCache::get_method() { |
11010 | 1585 if (klass() == NULL) return NULL; |
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1586 InstanceKlass* ik = InstanceKlass::cast(klass()); |
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1587 Method* m = ik->method_with_idnum(method_idnum()); |
0 | 1588 assert(m != NULL, "sanity check"); |
1589 return m; | |
1590 } | |
1591 | |
1592 | |
1593 #ifdef ASSERT | |
1594 // Release dummy object(s) at bottom of heap | |
1595 bool Universe::release_fullgc_alot_dummy() { | |
1596 MutexLocker ml(FullGCALot_lock); | |
1597 if (_fullgc_alot_dummy_array != NULL) { | |
1598 if (_fullgc_alot_dummy_next >= _fullgc_alot_dummy_array->length()) { | |
1599 // No more dummies to release, release entire array instead | |
1600 _fullgc_alot_dummy_array = NULL; | |
1601 return false; | |
1602 } | |
1603 if (!UseConcMarkSweepGC) { | |
1604 // Release dummy at bottom of old generation | |
1605 _fullgc_alot_dummy_array->obj_at_put(_fullgc_alot_dummy_next++, NULL); | |
1606 } | |
1607 // Release dummy at bottom of permanent generation | |
1608 _fullgc_alot_dummy_array->obj_at_put(_fullgc_alot_dummy_next++, NULL); | |
1609 } | |
1610 return true; | |
1611 } | |
1612 | |
1613 #endif // ASSERT |