Mercurial > hg > truffle
annotate src/share/vm/memory/universe.cpp @ 20450:fa6c442c59ee
8057827: notify an obj when allocation context stats are available
Reviewed-by: mikael, jmasa, tschatzl
| author | jcoomes |
|---|---|
| date | Wed, 10 Sep 2014 16:06:53 -0700 |
| parents | 6e0cb14ce59b |
| children | b840813adfcc |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved. |
| 0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #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" | |
| 81 #include "gc_implementation/g1/g1CollectorPolicy.hpp" | |
| 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; |
| 0 | 117 oop Universe::_out_of_memory_error_java_heap = NULL; |
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118 oop Universe::_out_of_memory_error_metaspace = NULL; |
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119 oop Universe::_out_of_memory_error_class_metaspace = NULL; |
| 0 | 120 oop Universe::_out_of_memory_error_array_size = NULL; |
| 121 oop Universe::_out_of_memory_error_gc_overhead_limit = NULL; | |
| 122 objArrayOop Universe::_preallocated_out_of_memory_error_array = NULL; | |
| 123 volatile jint Universe::_preallocated_out_of_memory_error_avail_count = 0; | |
| 124 bool Universe::_verify_in_progress = false; | |
| 125 oop Universe::_null_ptr_exception_instance = NULL; | |
| 126 oop Universe::_arithmetic_exception_instance = NULL; | |
| 127 oop Universe::_virtual_machine_error_instance = NULL; | |
| 128 oop Universe::_vm_exception = NULL; | |
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129 oop Universe::_allocation_context_notification_obj = NULL; |
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130 |
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131 Method* Universe::_throw_illegal_access_error = NULL; |
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132 Array<int>* Universe::_the_empty_int_array = NULL; |
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133 Array<u2>* Universe::_the_empty_short_array = NULL; |
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134 Array<Klass*>* Universe::_the_empty_klass_array = NULL; |
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135 Array<Method*>* Universe::_the_empty_method_array = NULL; |
| 0 | 136 |
| 137 // These variables are guarded by FullGCALot_lock. | |
| 138 debug_only(objArrayOop Universe::_fullgc_alot_dummy_array = NULL;) | |
| 139 debug_only(int Universe::_fullgc_alot_dummy_next = 0;) | |
| 140 | |
| 141 // Heap | |
| 142 int Universe::_verify_count = 0; | |
| 143 | |
| 144 int Universe::_base_vtable_size = 0; | |
| 145 bool Universe::_bootstrapping = false; | |
| 146 bool Universe::_fully_initialized = false; | |
| 147 | |
| 148 size_t Universe::_heap_capacity_at_last_gc; | |
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149 size_t Universe::_heap_used_at_last_gc = 0; |
| 0 | 150 |
| 151 CollectedHeap* Universe::_collectedHeap = NULL; | |
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152 |
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153 NarrowPtrStruct Universe::_narrow_oop = { NULL, 0, true }; |
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154 NarrowPtrStruct Universe::_narrow_klass = { NULL, 0, true }; |
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155 address Universe::_narrow_ptrs_base; |
| 0 | 156 |
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157 void Universe::basic_type_classes_do(void f(Klass*)) { |
| 0 | 158 f(boolArrayKlassObj()); |
| 159 f(byteArrayKlassObj()); | |
| 160 f(charArrayKlassObj()); | |
| 161 f(intArrayKlassObj()); | |
| 162 f(shortArrayKlassObj()); | |
| 163 f(longArrayKlassObj()); | |
| 164 f(singleArrayKlassObj()); | |
| 165 f(doubleArrayKlassObj()); | |
| 166 } | |
| 167 | |
| 168 void Universe::oops_do(OopClosure* f, bool do_all) { | |
| 169 | |
| 170 f->do_oop((oop*) &_int_mirror); | |
| 171 f->do_oop((oop*) &_float_mirror); | |
| 172 f->do_oop((oop*) &_double_mirror); | |
| 173 f->do_oop((oop*) &_byte_mirror); | |
| 174 f->do_oop((oop*) &_bool_mirror); | |
| 175 f->do_oop((oop*) &_char_mirror); | |
| 176 f->do_oop((oop*) &_long_mirror); | |
| 177 f->do_oop((oop*) &_short_mirror); | |
| 178 f->do_oop((oop*) &_void_mirror); | |
| 179 | |
| 180 for (int i = T_BOOLEAN; i < T_VOID+1; i++) { | |
| 181 f->do_oop((oop*) &_mirrors[i]); | |
| 182 } | |
| 183 assert(_mirrors[0] == NULL && _mirrors[T_BOOLEAN - 1] == NULL, "checking"); | |
| 184 | |
| 185 f->do_oop((oop*)&_the_empty_class_klass_array); | |
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186 f->do_oop((oop*)&_the_null_string); |
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187 f->do_oop((oop*)&_the_min_jint_string); |
| 0 | 188 f->do_oop((oop*)&_out_of_memory_error_java_heap); |
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189 f->do_oop((oop*)&_out_of_memory_error_metaspace); |
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190 f->do_oop((oop*)&_out_of_memory_error_class_metaspace); |
| 0 | 191 f->do_oop((oop*)&_out_of_memory_error_array_size); |
| 192 f->do_oop((oop*)&_out_of_memory_error_gc_overhead_limit); | |
| 193 f->do_oop((oop*)&_preallocated_out_of_memory_error_array); | |
| 194 f->do_oop((oop*)&_null_ptr_exception_instance); | |
| 195 f->do_oop((oop*)&_arithmetic_exception_instance); | |
| 196 f->do_oop((oop*)&_virtual_machine_error_instance); | |
| 197 f->do_oop((oop*)&_main_thread_group); | |
| 198 f->do_oop((oop*)&_system_thread_group); | |
| 199 f->do_oop((oop*)&_vm_exception); | |
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200 f->do_oop((oop*)&_allocation_context_notification_obj); |
| 0 | 201 debug_only(f->do_oop((oop*)&_fullgc_alot_dummy_array);) |
| 202 } | |
| 203 | |
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204 // Serialize metadata in and out of CDS archive, not oops. |
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205 void Universe::serialize(SerializeClosure* f, bool do_all) { |
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206 |
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207 f->do_ptr((void**)&_boolArrayKlassObj); |
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208 f->do_ptr((void**)&_byteArrayKlassObj); |
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209 f->do_ptr((void**)&_charArrayKlassObj); |
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210 f->do_ptr((void**)&_intArrayKlassObj); |
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211 f->do_ptr((void**)&_shortArrayKlassObj); |
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212 f->do_ptr((void**)&_longArrayKlassObj); |
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213 f->do_ptr((void**)&_singleArrayKlassObj); |
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214 f->do_ptr((void**)&_doubleArrayKlassObj); |
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215 f->do_ptr((void**)&_objectArrayKlassObj); |
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216 |
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217 { |
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218 for (int i = 0; i < T_VOID+1; i++) { |
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219 if (_typeArrayKlassObjs[i] != NULL) { |
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220 assert(i >= T_BOOLEAN, "checking"); |
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221 f->do_ptr((void**)&_typeArrayKlassObjs[i]); |
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222 } else if (do_all) { |
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223 f->do_ptr((void**)&_typeArrayKlassObjs[i]); |
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224 } |
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225 } |
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226 } |
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227 |
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228 f->do_ptr((void**)&_the_array_interfaces_array); |
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229 f->do_ptr((void**)&_the_empty_int_array); |
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230 f->do_ptr((void**)&_the_empty_short_array); |
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231 f->do_ptr((void**)&_the_empty_method_array); |
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232 f->do_ptr((void**)&_the_empty_klass_array); |
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233 _finalizer_register_cache->serialize(f); |
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234 _loader_addClass_cache->serialize(f); |
| 11010 | 235 _pd_implies_cache->serialize(f); |
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236 } |
| 0 | 237 |
| 238 void Universe::check_alignment(uintx size, uintx alignment, const char* name) { | |
| 239 if (size < alignment || size % alignment != 0) { | |
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240 vm_exit_during_initialization( |
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241 err_msg("Size of %s (" UINTX_FORMAT " bytes) must be aligned to " UINTX_FORMAT " bytes", name, size, alignment)); |
| 0 | 242 } |
| 243 } | |
| 244 | |
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245 void initialize_basic_type_klass(Klass* k, TRAPS) { |
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246 Klass* ok = SystemDictionary::Object_klass(); |
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247 if (UseSharedSpaces) { |
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248 ClassLoaderData* loader_data = ClassLoaderData::the_null_class_loader_data(); |
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249 assert(k->super() == ok, "u3"); |
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250 k->restore_unshareable_info(loader_data, Handle(), CHECK); |
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251 } else { |
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252 k->initialize_supers(ok, CHECK); |
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253 } |
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254 k->append_to_sibling_list(); |
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255 } |
| 0 | 256 |
| 257 void Universe::genesis(TRAPS) { | |
| 258 ResourceMark rm; | |
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259 |
| 0 | 260 { FlagSetting fs(_bootstrapping, true); |
| 261 | |
| 262 { MutexLocker mc(Compile_lock); | |
| 263 | |
| 264 // determine base vtable size; without that we cannot create the array klasses | |
| 265 compute_base_vtable_size(); | |
| 266 | |
| 267 if (!UseSharedSpaces) { | |
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268 _boolArrayKlassObj = TypeArrayKlass::create_klass(T_BOOLEAN, sizeof(jboolean), CHECK); |
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269 _charArrayKlassObj = TypeArrayKlass::create_klass(T_CHAR, sizeof(jchar), CHECK); |
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270 _singleArrayKlassObj = TypeArrayKlass::create_klass(T_FLOAT, sizeof(jfloat), CHECK); |
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271 _doubleArrayKlassObj = TypeArrayKlass::create_klass(T_DOUBLE, sizeof(jdouble), CHECK); |
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272 _byteArrayKlassObj = TypeArrayKlass::create_klass(T_BYTE, sizeof(jbyte), CHECK); |
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273 _shortArrayKlassObj = TypeArrayKlass::create_klass(T_SHORT, sizeof(jshort), CHECK); |
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274 _intArrayKlassObj = TypeArrayKlass::create_klass(T_INT, sizeof(jint), CHECK); |
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275 _longArrayKlassObj = TypeArrayKlass::create_klass(T_LONG, sizeof(jlong), CHECK); |
| 0 | 276 |
| 277 _typeArrayKlassObjs[T_BOOLEAN] = _boolArrayKlassObj; | |
| 278 _typeArrayKlassObjs[T_CHAR] = _charArrayKlassObj; | |
| 279 _typeArrayKlassObjs[T_FLOAT] = _singleArrayKlassObj; | |
| 280 _typeArrayKlassObjs[T_DOUBLE] = _doubleArrayKlassObj; | |
| 281 _typeArrayKlassObjs[T_BYTE] = _byteArrayKlassObj; | |
| 282 _typeArrayKlassObjs[T_SHORT] = _shortArrayKlassObj; | |
| 283 _typeArrayKlassObjs[T_INT] = _intArrayKlassObj; | |
| 284 _typeArrayKlassObjs[T_LONG] = _longArrayKlassObj; | |
| 285 | |
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286 ClassLoaderData* null_cld = ClassLoaderData::the_null_class_loader_data(); |
| 0 | 287 |
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288 _the_array_interfaces_array = MetadataFactory::new_array<Klass*>(null_cld, 2, NULL, CHECK); |
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289 _the_empty_int_array = MetadataFactory::new_array<int>(null_cld, 0, CHECK); |
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290 _the_empty_short_array = MetadataFactory::new_array<u2>(null_cld, 0, CHECK); |
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291 _the_empty_method_array = MetadataFactory::new_array<Method*>(null_cld, 0, CHECK); |
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292 _the_empty_klass_array = MetadataFactory::new_array<Klass*>(null_cld, 0, CHECK); |
| 0 | 293 } |
| 294 } | |
| 295 | |
| 296 vmSymbols::initialize(CHECK); | |
| 297 | |
| 298 SystemDictionary::initialize(CHECK); | |
| 299 | |
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300 Klass* ok = SystemDictionary::Object_klass(); |
| 0 | 301 |
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302 _the_null_string = StringTable::intern("null", CHECK); |
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303 _the_min_jint_string = StringTable::intern("-2147483648", CHECK); |
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304 |
| 0 | 305 if (UseSharedSpaces) { |
| 306 // Verify shared interfaces array. | |
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307 assert(_the_array_interfaces_array->at(0) == |
| 1142 | 308 SystemDictionary::Cloneable_klass(), "u3"); |
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309 assert(_the_array_interfaces_array->at(1) == |
| 1142 | 310 SystemDictionary::Serializable_klass(), "u3"); |
| 0 | 311 } else { |
| 312 // Set up shared interfaces array. (Do this before supers are set up.) | |
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313 _the_array_interfaces_array->at_put(0, SystemDictionary::Cloneable_klass()); |
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314 _the_array_interfaces_array->at_put(1, SystemDictionary::Serializable_klass()); |
| 0 | 315 } |
| 316 | |
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317 initialize_basic_type_klass(boolArrayKlassObj(), CHECK); |
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318 initialize_basic_type_klass(charArrayKlassObj(), CHECK); |
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319 initialize_basic_type_klass(singleArrayKlassObj(), CHECK); |
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320 initialize_basic_type_klass(doubleArrayKlassObj(), CHECK); |
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321 initialize_basic_type_klass(byteArrayKlassObj(), CHECK); |
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322 initialize_basic_type_klass(shortArrayKlassObj(), CHECK); |
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323 initialize_basic_type_klass(intArrayKlassObj(), CHECK); |
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324 initialize_basic_type_klass(longArrayKlassObj(), CHECK); |
| 0 | 325 } // end of core bootstrapping |
| 326 | |
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327 // Maybe this could be lifted up now that object array can be initialized |
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328 // during the bootstrapping. |
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329 |
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330 // OLD |
| 0 | 331 // Initialize _objectArrayKlass after core bootstraping to make |
| 332 // sure the super class is set up properly for _objectArrayKlass. | |
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333 // --- |
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334 // NEW |
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335 // Since some of the old system object arrays have been converted to |
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336 // ordinary object arrays, _objectArrayKlass will be loaded when |
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337 // SystemDictionary::initialize(CHECK); is run. See the extra check |
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338 // for Object_klass_loaded in objArrayKlassKlass::allocate_objArray_klass_impl. |
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339 _objectArrayKlassObj = InstanceKlass:: |
| 1142 | 340 cast(SystemDictionary::Object_klass())->array_klass(1, CHECK); |
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341 // OLD |
| 0 | 342 // Add the class to the class hierarchy manually to make sure that |
| 343 // its vtable is initialized after core bootstrapping is completed. | |
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344 // --- |
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345 // New |
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346 // Have already been initialized. |
| 6983 | 347 _objectArrayKlassObj->append_to_sibling_list(); |
| 0 | 348 |
| 349 // Compute is_jdk version flags. | |
| 350 // Only 1.3 or later has the java.lang.Shutdown class. | |
| 351 // Only 1.4 or later has the java.lang.CharSequence interface. | |
| 352 // Only 1.5 or later has the java.lang.management.MemoryUsage class. | |
| 242 | 353 if (JDK_Version::is_partially_initialized()) { |
| 354 uint8_t jdk_version; | |
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355 Klass* k = SystemDictionary::resolve_or_null( |
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356 vmSymbols::java_lang_management_MemoryUsage(), THREAD); |
| 0 | 357 CLEAR_PENDING_EXCEPTION; // ignore exceptions |
| 358 if (k == NULL) { | |
| 242 | 359 k = SystemDictionary::resolve_or_null( |
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360 vmSymbols::java_lang_CharSequence(), 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_Shutdown(), THREAD); |
| 0 | 365 CLEAR_PENDING_EXCEPTION; // ignore exceptions |
| 366 if (k == NULL) { | |
| 242 | 367 jdk_version = 2; |
| 0 | 368 } else { |
| 242 | 369 jdk_version = 3; |
| 0 | 370 } |
| 371 } else { | |
| 242 | 372 jdk_version = 4; |
| 0 | 373 } |
| 374 } else { | |
| 242 | 375 jdk_version = 5; |
| 0 | 376 } |
| 242 | 377 JDK_Version::fully_initialize(jdk_version); |
| 0 | 378 } |
| 379 | |
| 380 #ifdef ASSERT | |
| 381 if (FullGCALot) { | |
| 382 // Allocate an array of dummy objects. | |
| 383 // We'd like these to be at the bottom of the old generation, | |
| 384 // so that when we free one and then collect, | |
| 385 // (almost) the whole heap moves | |
| 386 // and we find out if we actually update all the oops correctly. | |
| 387 // But we can't allocate directly in the old generation, | |
| 388 // so we allocate wherever, and hope that the first collection | |
| 389 // moves these objects to the bottom of the old generation. | |
| 390 // We can allocate directly in the permanent generation, so we do. | |
| 391 int size; | |
| 392 if (UseConcMarkSweepGC) { | |
| 393 warning("Using +FullGCALot with concurrent mark sweep gc " | |
| 394 "will not force all objects to relocate"); | |
| 395 size = FullGCALotDummies; | |
| 396 } else { | |
| 397 size = FullGCALotDummies * 2; | |
| 398 } | |
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399 objArrayOop naked_array = oopFactory::new_objArray(SystemDictionary::Object_klass(), size, CHECK); |
| 0 | 400 objArrayHandle dummy_array(THREAD, naked_array); |
| 401 int i = 0; | |
| 402 while (i < size) { | |
| 403 // Allocate dummy in old generation | |
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404 oop dummy = InstanceKlass::cast(SystemDictionary::Object_klass())->allocate_instance(CHECK); |
| 0 | 405 dummy_array->obj_at_put(i++, dummy); |
| 406 } | |
| 407 { | |
| 408 // Only modify the global variable inside the mutex. | |
| 409 // If we had a race to here, the other dummy_array instances | |
| 410 // and their elements just get dropped on the floor, which is fine. | |
| 411 MutexLocker ml(FullGCALot_lock); | |
| 412 if (_fullgc_alot_dummy_array == NULL) { | |
| 413 _fullgc_alot_dummy_array = dummy_array(); | |
| 414 } | |
| 415 } | |
| 416 assert(i == _fullgc_alot_dummy_array->length(), "just checking"); | |
| 417 } | |
| 418 #endif | |
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419 |
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420 // Initialize dependency array for null class loader |
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421 ClassLoaderData::the_null_class_loader_data()->init_dependencies(CHECK); |
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422 |
| 0 | 423 } |
| 424 | |
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425 // CDS support for patching vtables in metadata in the shared archive. |
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426 // All types inherited from Metadata have vtables, but not types inherited |
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427 // from MetaspaceObj, because the latter does not have virtual functions. |
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428 // If the metadata type has a vtable, it cannot be shared in the read-only |
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429 // section of the CDS archive, because the vtable pointer is patched. |
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430 static inline void add_vtable(void** list, int* n, void* o, int count) { |
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431 guarantee((*n) < count, "vtable list too small"); |
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432 void* vtable = dereference_vptr(o); |
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433 assert(*(void**)(vtable) != NULL, "invalid vtable"); |
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434 list[(*n)++] = vtable; |
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435 } |
| 0 | 436 |
| 437 void Universe::init_self_patching_vtbl_list(void** list, int count) { | |
| 438 int n = 0; | |
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439 { InstanceKlass o; add_vtable(list, &n, &o, count); } |
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440 { InstanceClassLoaderKlass o; add_vtable(list, &n, &o, count); } |
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441 { InstanceMirrorKlass o; add_vtable(list, &n, &o, count); } |
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442 { InstanceRefKlass o; add_vtable(list, &n, &o, count); } |
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443 { TypeArrayKlass o; add_vtable(list, &n, &o, count); } |
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444 { ObjArrayKlass o; add_vtable(list, &n, &o, count); } |
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445 { Method o; add_vtable(list, &n, &o, count); } |
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446 { ConstantPool o; add_vtable(list, &n, &o, count); } |
| 0 | 447 } |
| 448 | |
| 449 void Universe::initialize_basic_type_mirrors(TRAPS) { | |
| 450 assert(_int_mirror==NULL, "basic type mirrors already initialized"); | |
| 451 _int_mirror = | |
| 452 java_lang_Class::create_basic_type_mirror("int", T_INT, CHECK); | |
| 453 _float_mirror = | |
| 454 java_lang_Class::create_basic_type_mirror("float", T_FLOAT, CHECK); | |
| 455 _double_mirror = | |
| 456 java_lang_Class::create_basic_type_mirror("double", T_DOUBLE, CHECK); | |
| 457 _byte_mirror = | |
| 458 java_lang_Class::create_basic_type_mirror("byte", T_BYTE, CHECK); | |
| 459 _bool_mirror = | |
| 460 java_lang_Class::create_basic_type_mirror("boolean",T_BOOLEAN, CHECK); | |
| 461 _char_mirror = | |
| 462 java_lang_Class::create_basic_type_mirror("char", T_CHAR, CHECK); | |
| 463 _long_mirror = | |
| 464 java_lang_Class::create_basic_type_mirror("long", T_LONG, CHECK); | |
| 465 _short_mirror = | |
| 466 java_lang_Class::create_basic_type_mirror("short", T_SHORT, CHECK); | |
| 467 _void_mirror = | |
| 468 java_lang_Class::create_basic_type_mirror("void", T_VOID, CHECK); | |
| 469 | |
| 470 _mirrors[T_INT] = _int_mirror; | |
| 471 _mirrors[T_FLOAT] = _float_mirror; | |
| 472 _mirrors[T_DOUBLE] = _double_mirror; | |
| 473 _mirrors[T_BYTE] = _byte_mirror; | |
| 474 _mirrors[T_BOOLEAN] = _bool_mirror; | |
| 475 _mirrors[T_CHAR] = _char_mirror; | |
| 476 _mirrors[T_LONG] = _long_mirror; | |
| 477 _mirrors[T_SHORT] = _short_mirror; | |
| 478 _mirrors[T_VOID] = _void_mirror; | |
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479 //_mirrors[T_OBJECT] = InstanceKlass::cast(_object_klass)->java_mirror(); |
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480 //_mirrors[T_ARRAY] = InstanceKlass::cast(_object_klass)->java_mirror(); |
| 0 | 481 } |
| 482 | |
| 483 void Universe::fixup_mirrors(TRAPS) { | |
| 484 // Bootstrap problem: all classes gets a mirror (java.lang.Class instance) assigned eagerly, | |
| 485 // but we cannot do that for classes created before java.lang.Class is loaded. Here we simply | |
| 486 // walk over permanent objects created so far (mostly classes) and fixup their mirrors. Note | |
| 487 // that the number of objects allocated at this point is very small. | |
| 1142 | 488 assert(SystemDictionary::Class_klass_loaded(), "java.lang.Class should be loaded"); |
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489 HandleMark hm(THREAD); |
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490 // Cache the start of the static fields |
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491 InstanceMirrorKlass::init_offset_of_static_fields(); |
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492 |
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493 GrowableArray <Klass*>* list = java_lang_Class::fixup_mirror_list(); |
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494 int list_length = list->length(); |
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495 for (int i = 0; i < list_length; i++) { |
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496 Klass* k = list->at(i); |
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497 assert(k->is_klass(), "List should only hold classes"); |
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498 EXCEPTION_MARK; |
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499 KlassHandle kh(THREAD, k); |
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500 java_lang_Class::fixup_mirror(kh, CATCH); |
| 0 | 501 } |
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502 delete java_lang_Class::fixup_mirror_list(); |
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503 java_lang_Class::set_fixup_mirror_list(NULL); |
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504 } |
| 0 | 505 |
| 506 static bool has_run_finalizers_on_exit = false; | |
| 507 | |
| 508 void Universe::run_finalizers_on_exit() { | |
| 509 if (has_run_finalizers_on_exit) return; | |
| 510 has_run_finalizers_on_exit = true; | |
| 511 | |
| 512 // Called on VM exit. This ought to be run in a separate thread. | |
| 513 if (TraceReferenceGC) tty->print_cr("Callback to run finalizers on exit"); | |
| 514 { | |
| 515 PRESERVE_EXCEPTION_MARK; | |
| 1142 | 516 KlassHandle finalizer_klass(THREAD, SystemDictionary::Finalizer_klass()); |
| 0 | 517 JavaValue result(T_VOID); |
| 518 JavaCalls::call_static( | |
| 519 &result, | |
| 520 finalizer_klass, | |
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521 vmSymbols::run_finalizers_on_exit_name(), |
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522 vmSymbols::void_method_signature(), |
| 0 | 523 THREAD |
| 524 ); | |
| 525 // Ignore any pending exceptions | |
| 526 CLEAR_PENDING_EXCEPTION; | |
| 527 } | |
| 528 } | |
| 529 | |
| 530 | |
| 531 // initialize_vtable could cause gc if | |
| 532 // 1) we specified true to initialize_vtable and | |
| 533 // 2) this ran after gc was enabled | |
| 534 // In case those ever change we use handles for oops | |
| 535 void Universe::reinitialize_vtable_of(KlassHandle k_h, TRAPS) { | |
| 536 // init vtable of k and all subclasses | |
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537 Klass* ko = k_h(); |
| 0 | 538 klassVtable* vt = ko->vtable(); |
| 539 if (vt) vt->initialize_vtable(false, CHECK); | |
| 540 if (ko->oop_is_instance()) { | |
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541 InstanceKlass* ik = (InstanceKlass*)ko; |
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542 for (KlassHandle s_h(THREAD, ik->subklass()); |
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543 s_h() != NULL; |
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544 s_h = KlassHandle(THREAD, s_h()->next_sibling())) { |
| 0 | 545 reinitialize_vtable_of(s_h, CHECK); |
| 546 } | |
| 547 } | |
| 548 } | |
| 549 | |
| 550 | |
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551 void initialize_itable_for_klass(Klass* k, TRAPS) { |
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552 InstanceKlass::cast(k)->itable()->initialize_itable(false, CHECK); |
| 0 | 553 } |
| 554 | |
| 555 | |
| 556 void Universe::reinitialize_itables(TRAPS) { | |
| 557 SystemDictionary::classes_do(initialize_itable_for_klass, CHECK); | |
| 558 | |
| 559 } | |
| 560 | |
| 561 | |
| 562 bool Universe::on_page_boundary(void* addr) { | |
| 563 return ((uintptr_t) addr) % os::vm_page_size() == 0; | |
| 564 } | |
| 565 | |
| 566 | |
| 567 bool Universe::should_fill_in_stack_trace(Handle throwable) { | |
| 568 // never attempt to fill in the stack trace of preallocated errors that do not have | |
| 569 // backtrace. These errors are kept alive forever and may be "re-used" when all | |
| 570 // preallocated errors with backtrace have been consumed. Also need to avoid | |
| 571 // a potential loop which could happen if an out of memory occurs when attempting | |
| 572 // to allocate the backtrace. | |
| 573 return ((throwable() != Universe::_out_of_memory_error_java_heap) && | |
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574 (throwable() != Universe::_out_of_memory_error_metaspace) && |
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575 (throwable() != Universe::_out_of_memory_error_class_metaspace) && |
| 0 | 576 (throwable() != Universe::_out_of_memory_error_array_size) && |
| 577 (throwable() != Universe::_out_of_memory_error_gc_overhead_limit)); | |
| 578 } | |
| 579 | |
| 580 | |
| 581 oop Universe::gen_out_of_memory_error(oop default_err) { | |
| 582 // generate an out of memory error: | |
| 583 // - if there is a preallocated error with backtrace available then return it wth | |
| 584 // a filled in stack trace. | |
| 585 // - if there are no preallocated errors with backtrace available then return | |
| 586 // an error without backtrace. | |
| 587 int next; | |
| 588 if (_preallocated_out_of_memory_error_avail_count > 0) { | |
| 589 next = (int)Atomic::add(-1, &_preallocated_out_of_memory_error_avail_count); | |
| 590 assert(next < (int)PreallocatedOutOfMemoryErrorCount, "avail count is corrupt"); | |
| 591 } else { | |
| 592 next = -1; | |
| 593 } | |
| 594 if (next < 0) { | |
| 595 // all preallocated errors have been used. | |
| 596 // return default | |
| 597 return default_err; | |
| 598 } else { | |
| 599 // get the error object at the slot and set set it to NULL so that the | |
| 600 // array isn't keeping it alive anymore. | |
| 601 oop exc = preallocated_out_of_memory_errors()->obj_at(next); | |
| 602 assert(exc != NULL, "slot has been used already"); | |
| 603 preallocated_out_of_memory_errors()->obj_at_put(next, NULL); | |
| 604 | |
| 605 // use the message from the default error | |
| 606 oop msg = java_lang_Throwable::message(default_err); | |
| 607 assert(msg != NULL, "no message"); | |
| 608 java_lang_Throwable::set_message(exc, msg); | |
| 609 | |
| 610 // populate the stack trace and return it. | |
| 611 java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(exc); | |
| 612 return exc; | |
| 613 } | |
| 614 } | |
| 615 | |
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616 intptr_t Universe::_non_oop_bits = 0; |
| 0 | 617 |
| 618 void* Universe::non_oop_word() { | |
| 619 // Neither the high bits nor the low bits of this value is allowed | |
| 620 // to look like (respectively) the high or low bits of a real oop. | |
| 621 // | |
| 622 // High and low are CPU-specific notions, but low always includes | |
| 623 // the low-order bit. Since oops are always aligned at least mod 4, | |
| 624 // setting the low-order bit will ensure that the low half of the | |
| 625 // word will never look like that of a real oop. | |
| 626 // | |
| 627 // Using the OS-supplied non-memory-address word (usually 0 or -1) | |
| 628 // will take care of the high bits, however many there are. | |
| 629 | |
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630 if (_non_oop_bits == 0) { |
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631 _non_oop_bits = (intptr_t)os::non_memory_address_word() | 1; |
| 0 | 632 } |
| 633 | |
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634 return (void*)_non_oop_bits; |
| 0 | 635 } |
| 636 | |
| 637 jint universe_init() { | |
| 638 assert(!Universe::_fully_initialized, "called after initialize_vtables"); | |
| 639 guarantee(1 << LogHeapWordSize == sizeof(HeapWord), | |
| 640 "LogHeapWordSize is incorrect."); | |
| 641 guarantee(sizeof(oop) >= sizeof(HeapWord), "HeapWord larger than oop?"); | |
| 642 guarantee(sizeof(oop) % sizeof(HeapWord) == 0, | |
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643 "oop size is not not a multiple of HeapWord size"); |
| 0 | 644 TraceTime timer("Genesis", TraceStartupTime); |
| 645 JavaClasses::compute_hard_coded_offsets(); | |
| 646 | |
| 647 jint status = Universe::initialize_heap(); | |
| 648 if (status != JNI_OK) { | |
| 649 return status; | |
| 650 } | |
| 651 | |
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652 Metaspace::global_initialize(); |
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653 |
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654 // Create memory for metadata. Must be after initializing heap for |
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655 // DumpSharedSpaces. |
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656 ClassLoaderData::init_null_class_loader_data(); |
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657 |
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658 // We have a heap so create the Method* caches before |
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659 // Metaspace::initialize_shared_spaces() tries to populate them. |
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660 Universe::_finalizer_register_cache = new LatestMethodCache(); |
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661 Universe::_loader_addClass_cache = new LatestMethodCache(); |
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662 Universe::_pd_implies_cache = new LatestMethodCache(); |
| 0 | 663 |
| 664 if (UseSharedSpaces) { | |
| 665 // Read the data structures supporting the shared spaces (shared | |
| 666 // system dictionary, symbol table, etc.). After that, access to | |
| 667 // the file (other than the mapped regions) is no longer needed, and | |
| 668 // the file is closed. Closing the file does not affect the | |
| 669 // currently mapped regions. | |
|
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670 MetaspaceShared::initialize_shared_spaces(); |
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671 StringTable::create_table(); |
| 0 | 672 } else { |
| 673 SymbolTable::create_table(); | |
| 674 StringTable::create_table(); | |
| 675 ClassLoader::create_package_info_table(); | |
|
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676 |
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677 if (DumpSharedSpaces) { |
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678 MetaspaceShared::prepare_for_dumping(); |
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679 } |
| 0 | 680 } |
| 681 | |
| 682 return JNI_OK; | |
| 683 } | |
| 684 | |
|
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685 // Choose the heap base address and oop encoding mode |
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686 // when compressed oops are used: |
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|
687 // Unscaled - Use 32-bits oops without encoding when |
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688 // NarrowOopHeapBaseMin + heap_size < 4Gb |
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689 // ZeroBased - Use zero based compressed oops with encoding when |
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690 // NarrowOopHeapBaseMin + heap_size < 32Gb |
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691 // HeapBased - Use compressed oops with heap base + encoding. |
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692 |
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693 // 4Gb |
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694 static const uint64_t UnscaledOopHeapMax = (uint64_t(max_juint) + 1); |
|
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695 // 32Gb |
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696 // OopEncodingHeapMax == UnscaledOopHeapMax << LogMinObjAlignmentInBytes; |
|
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697 |
|
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698 char* Universe::preferred_heap_base(size_t heap_size, size_t alignment, NARROW_OOP_MODE mode) { |
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699 assert(is_size_aligned((size_t)OopEncodingHeapMax, alignment), "Must be"); |
|
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700 assert(is_size_aligned((size_t)UnscaledOopHeapMax, alignment), "Must be"); |
|
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701 assert(is_size_aligned(heap_size, alignment), "Must be"); |
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702 |
|
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703 uintx heap_base_min_address_aligned = align_size_up(HeapBaseMinAddress, alignment); |
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704 |
|
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705 size_t base = 0; |
|
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706 #ifdef _LP64 |
|
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707 if (UseCompressedOops) { |
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708 assert(mode == UnscaledNarrowOop || |
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709 mode == ZeroBasedNarrowOop || |
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710 mode == HeapBasedNarrowOop, "mode is invalid"); |
|
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711 const size_t total_size = heap_size + heap_base_min_address_aligned; |
|
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|
712 // Return specified base for the first request. |
|
1a81ea4b45d4
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|
713 if (!FLAG_IS_DEFAULT(HeapBaseMinAddress) && (mode == UnscaledNarrowOop)) { |
|
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714 base = heap_base_min_address_aligned; |
|
7982
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|
715 |
|
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|
716 // If the total size is small enough to allow UnscaledNarrowOop then |
|
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717 // just use UnscaledNarrowOop. |
|
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718 } else if ((total_size <= OopEncodingHeapMax) && (mode != HeapBasedNarrowOop)) { |
|
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719 if ((total_size <= UnscaledOopHeapMax) && (mode == UnscaledNarrowOop) && |
|
642
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|
720 (Universe::narrow_oop_shift() == 0)) { |
|
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721 // Use 32-bits oops without encoding and |
|
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722 // place heap's top on the 4Gb boundary |
|
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|
723 base = (UnscaledOopHeapMax - heap_size); |
|
642
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|
724 } else { |
|
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|
725 // Can't reserve with NarrowOopShift == 0 |
|
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|
726 Universe::set_narrow_oop_shift(LogMinObjAlignmentInBytes); |
|
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|
727 |
|
642
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|
728 if (mode == UnscaledNarrowOop || |
|
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|
729 mode == ZeroBasedNarrowOop && total_size <= UnscaledOopHeapMax) { |
|
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|
730 |
|
642
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|
731 // Use zero based compressed oops with encoding and |
|
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|
732 // place heap's top on the 32Gb boundary in case |
|
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|
733 // total_size > 4Gb or failed to reserve below 4Gb. |
|
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|
734 uint64_t heap_top = OopEncodingHeapMax; |
|
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|
735 |
|
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|
736 // For small heaps, save some space for compressed class pointer |
|
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|
737 // space so it can be decoded with no base. |
|
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|
738 if (UseCompressedClassPointers && !UseSharedSpaces && |
|
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|
739 OopEncodingHeapMax <= 32*G) { |
|
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|
740 |
|
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|
741 uint64_t class_space = align_size_up(CompressedClassSpaceSize, alignment); |
|
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|
742 assert(is_size_aligned((size_t)OopEncodingHeapMax-class_space, |
|
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|
743 alignment), "difference must be aligned too"); |
|
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|
744 uint64_t new_top = OopEncodingHeapMax-class_space; |
|
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|
745 |
|
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|
746 if (total_size <= new_top) { |
|
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|
747 heap_top = new_top; |
|
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|
748 } |
|
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|
749 } |
|
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|
750 |
|
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|
751 // Align base to the adjusted top of the heap |
|
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|
752 base = heap_top - heap_size; |
|
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|
753 } |
|
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|
754 } |
|
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|
755 } else { |
|
7982
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|
756 // UnscaledNarrowOop encoding didn't work, and no base was found for ZeroBasedOops or |
|
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|
757 // HeapBasedNarrowOop encoding was requested. So, can't reserve below 32Gb. |
|
642
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|
758 Universe::set_narrow_oop_shift(LogMinObjAlignmentInBytes); |
|
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|
759 } |
|
7982
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|
760 |
|
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|
761 // Set narrow_oop_base and narrow_oop_use_implicit_null_checks |
|
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762 // used in ReservedHeapSpace() constructors. |
|
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763 // The final values will be set in initialize_heap() below. |
|
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|
764 if ((base != 0) && ((base + heap_size) <= OopEncodingHeapMax)) { |
|
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|
765 // Use zero based compressed oops |
|
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|
766 Universe::set_narrow_oop_base(NULL); |
|
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|
767 // Don't need guard page for implicit checks in indexed |
|
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|
768 // addressing mode with zero based Compressed Oops. |
|
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|
769 Universe::set_narrow_oop_use_implicit_null_checks(true); |
|
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|
770 } else { |
|
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|
771 // Set to a non-NULL value so the ReservedSpace ctor computes |
|
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|
772 // the correct no-access prefix. |
|
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|
773 // The final value will be set in initialize_heap() below. |
|
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|
774 Universe::set_narrow_oop_base((address)UnscaledOopHeapMax); |
| 14411 | 775 #if defined(_WIN64) || defined(AIX) |
|
1057
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776 if (UseLargePages) { |
|
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|
777 // Cannot allocate guard pages for implicit checks in indexed |
|
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|
778 // addressing mode when large pages are specified on windows. |
|
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|
779 Universe::set_narrow_oop_use_implicit_null_checks(false); |
|
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|
780 } |
|
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|
781 #endif // _WIN64 |
|
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|
782 } |
|
642
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|
783 } |
|
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|
784 #endif |
|
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|
785 |
|
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|
786 assert(is_ptr_aligned((char*)base, alignment), "Must be"); |
|
1057
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|
787 return (char*)base; // also return NULL (don't care) for 32-bit VM |
|
642
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|
788 } |
|
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|
789 |
| 0 | 790 jint Universe::initialize_heap() { |
| 791 | |
| 792 if (UseParallelGC) { | |
|
8001
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|
793 #if INCLUDE_ALL_GCS |
| 0 | 794 Universe::_collectedHeap = new ParallelScavengeHeap(); |
|
8001
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|
795 #else // INCLUDE_ALL_GCS |
|
6854
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7189254: Change makefiles for more flexibility to override defaults
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796 fatal("UseParallelGC not supported in this VM."); |
|
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797 #endif // INCLUDE_ALL_GCS |
| 0 | 798 |
|
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799 } else if (UseG1GC) { |
|
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800 #if INCLUDE_ALL_GCS |
| 4013 | 801 G1CollectorPolicy* g1p = new G1CollectorPolicy(); |
|
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802 g1p->initialize_all(); |
|
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803 G1CollectedHeap* g1h = new G1CollectedHeap(g1p); |
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804 Universe::_collectedHeap = g1h; |
|
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805 #else // INCLUDE_ALL_GCS |
|
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806 fatal("UseG1GC not supported in java kernel vm."); |
|
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807 #endif // INCLUDE_ALL_GCS |
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808 |
| 0 | 809 } else { |
| 810 GenCollectorPolicy *gc_policy; | |
| 811 | |
| 812 if (UseSerialGC) { | |
| 813 gc_policy = new MarkSweepPolicy(); | |
| 814 } else if (UseConcMarkSweepGC) { | |
|
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815 #if INCLUDE_ALL_GCS |
| 0 | 816 if (UseAdaptiveSizePolicy) { |
| 817 gc_policy = new ASConcurrentMarkSweepPolicy(); | |
| 818 } else { | |
| 819 gc_policy = new ConcurrentMarkSweepPolicy(); | |
| 820 } | |
|
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821 #else // INCLUDE_ALL_GCS |
|
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822 fatal("UseConcMarkSweepGC not supported in this VM."); |
|
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823 #endif // INCLUDE_ALL_GCS |
| 0 | 824 } else { // default old generation |
| 825 gc_policy = new MarkSweepPolicy(); | |
| 826 } | |
|
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827 gc_policy->initialize_all(); |
| 0 | 828 |
| 829 Universe::_collectedHeap = new GenCollectedHeap(gc_policy); | |
| 830 } | |
| 831 | |
| 17727 | 832 ThreadLocalAllocBuffer::set_max_size(Universe::heap()->max_tlab_size()); |
| 833 | |
| 0 | 834 jint status = Universe::heap()->initialize(); |
| 835 if (status != JNI_OK) { | |
| 836 return status; | |
| 837 } | |
|
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838 |
|
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839 #ifdef _LP64 |
|
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840 if (UseCompressedOops) { |
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841 // Subtract a page because something can get allocated at heap base. |
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842 // This also makes implicit null checking work, because the |
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843 // memory+1 page below heap_base needs to cause a signal. |
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844 // See needs_explicit_null_check. |
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845 // Only set the heap base for compressed oops because it indicates |
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846 // compressed oops for pstack code. |
| 2080 | 847 bool verbose = PrintCompressedOopsMode || (PrintMiscellaneous && Verbose); |
| 848 if (verbose) { | |
|
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849 tty->cr(); |
| 1963 | 850 tty->print("heap address: " PTR_FORMAT ", size: " SIZE_FORMAT " MB", |
| 851 Universe::heap()->base(), Universe::heap()->reserved_region().byte_size()/M); | |
|
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852 } |
|
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853 if (((uint64_t)Universe::heap()->reserved_region().end() > OopEncodingHeapMax)) { |
|
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854 // Can't reserve heap below 32Gb. |
|
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855 // keep the Universe::narrow_oop_base() set in Universe::reserve_heap() |
|
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856 Universe::set_narrow_oop_shift(LogMinObjAlignmentInBytes); |
| 14411 | 857 #ifdef AIX |
| 858 // There is no protected page before the heap. This assures all oops | |
| 859 // are decoded so that NULL is preserved, so this page will not be accessed. | |
| 860 Universe::set_narrow_oop_use_implicit_null_checks(false); | |
| 861 #endif | |
| 2080 | 862 if (verbose) { |
| 10405 | 863 tty->print(", %s: "PTR_FORMAT, |
| 864 narrow_oop_mode_to_string(HeapBasedNarrowOop), | |
| 865 Universe::narrow_oop_base()); | |
|
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866 } |
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867 } else { |
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868 Universe::set_narrow_oop_base(0); |
| 2080 | 869 if (verbose) { |
| 10405 | 870 tty->print(", %s", narrow_oop_mode_to_string(ZeroBasedNarrowOop)); |
|
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871 } |
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872 #ifdef _WIN64 |
|
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873 if (!Universe::narrow_oop_use_implicit_null_checks()) { |
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874 // Don't need guard page for implicit checks in indexed addressing |
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875 // mode with zero based Compressed Oops. |
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876 Universe::set_narrow_oop_use_implicit_null_checks(true); |
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877 } |
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878 #endif // _WIN64 |
|
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879 if((uint64_t)Universe::heap()->reserved_region().end() > UnscaledOopHeapMax) { |
|
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880 // Can't reserve heap below 4Gb. |
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881 Universe::set_narrow_oop_shift(LogMinObjAlignmentInBytes); |
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882 } else { |
|
922
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883 Universe::set_narrow_oop_shift(0); |
| 2080 | 884 if (verbose) { |
| 10405 | 885 tty->print(", %s", narrow_oop_mode_to_string(UnscaledNarrowOop)); |
|
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886 } |
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887 } |
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888 } |
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889 |
| 2080 | 890 if (verbose) { |
|
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891 tty->cr(); |
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892 tty->cr(); |
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893 } |
|
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894 Universe::set_narrow_ptrs_base(Universe::narrow_oop_base()); |
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895 } |
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896 // Universe::narrow_oop_base() is one page below the heap. |
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897 assert((intptr_t)Universe::narrow_oop_base() <= (intptr_t)(Universe::heap()->base() - |
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898 os::vm_page_size()) || |
|
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899 Universe::narrow_oop_base() == NULL, "invalid value"); |
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900 assert(Universe::narrow_oop_shift() == LogMinObjAlignmentInBytes || |
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901 Universe::narrow_oop_shift() == 0, "invalid value"); |
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902 #endif |
| 0 | 903 |
| 904 // We will never reach the CATCH below since Exceptions::_throw will cause | |
| 905 // the VM to exit if an exception is thrown during initialization | |
| 906 | |
| 907 if (UseTLAB) { | |
| 908 assert(Universe::heap()->supports_tlab_allocation(), | |
| 909 "Should support thread-local allocation buffers"); | |
| 910 ThreadLocalAllocBuffer::startup_initialization(); | |
| 911 } | |
| 912 return JNI_OK; | |
| 913 } | |
| 914 | |
|
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915 |
|
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916 // Reserve the Java heap, which is now the same for all GCs. |
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917 ReservedSpace Universe::reserve_heap(size_t heap_size, size_t alignment) { |
|
12233
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|
918 assert(alignment <= Arguments::conservative_max_heap_alignment(), |
|
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919 err_msg("actual alignment "SIZE_FORMAT" must be within maximum heap alignment "SIZE_FORMAT, |
|
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920 alignment, Arguments::conservative_max_heap_alignment())); |
|
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921 size_t total_reserved = align_size_up(heap_size, alignment); |
|
8741
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|
922 assert(!UseCompressedOops || (total_reserved <= (OopEncodingHeapMax - os::vm_page_size())), |
|
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|
923 "heap size is too big for compressed oops"); |
|
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924 |
|
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|
925 bool use_large_pages = UseLargePages && is_size_aligned(alignment, os::large_page_size()); |
|
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|
926 assert(!UseLargePages |
|
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|
927 || UseParallelGC |
|
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928 || use_large_pages, "Wrong alignment to use large pages"); |
|
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929 |
|
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930 char* addr = Universe::preferred_heap_base(total_reserved, alignment, Universe::UnscaledNarrowOop); |
|
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931 |
|
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932 ReservedHeapSpace total_rs(total_reserved, alignment, use_large_pages, addr); |
|
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933 |
|
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934 if (UseCompressedOops) { |
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935 if (addr != NULL && !total_rs.is_reserved()) { |
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936 // Failed to reserve at specified address - the requested memory |
|
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937 // region is taken already, for example, by 'java' launcher. |
|
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938 // Try again to reserver heap higher. |
|
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939 addr = Universe::preferred_heap_base(total_reserved, alignment, Universe::ZeroBasedNarrowOop); |
|
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940 |
|
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941 ReservedHeapSpace total_rs0(total_reserved, alignment, |
|
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942 use_large_pages, addr); |
|
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943 |
|
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944 if (addr != NULL && !total_rs0.is_reserved()) { |
|
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945 // Failed to reserve at specified address again - give up. |
|
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|
946 addr = Universe::preferred_heap_base(total_reserved, alignment, Universe::HeapBasedNarrowOop); |
|
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947 assert(addr == NULL, ""); |
|
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948 |
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949 ReservedHeapSpace total_rs1(total_reserved, alignment, |
|
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950 use_large_pages, addr); |
|
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951 total_rs = total_rs1; |
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952 } else { |
|
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953 total_rs = total_rs0; |
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954 } |
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955 } |
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956 } |
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957 |
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958 if (!total_rs.is_reserved()) { |
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959 vm_exit_during_initialization(err_msg("Could not reserve enough space for " SIZE_FORMAT "KB object heap", total_reserved/K)); |
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960 return total_rs; |
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961 } |
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962 |
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963 if (UseCompressedOops) { |
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964 // Universe::initialize_heap() will reset this to NULL if unscaled |
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965 // or zero-based narrow oops are actually used. |
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966 address base = (address)(total_rs.base() - os::vm_page_size()); |
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967 Universe::set_narrow_oop_base(base); |
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968 } |
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969 return total_rs; |
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970 } |
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971 |
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972 |
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973 // It's the caller's responsibility to ensure glitch-freedom |
| 0 | 974 // (if required). |
| 975 void Universe::update_heap_info_at_gc() { | |
| 976 _heap_capacity_at_last_gc = heap()->capacity(); | |
| 977 _heap_used_at_last_gc = heap()->used(); | |
| 978 } | |
| 979 | |
| 980 | |
| 10405 | 981 const char* Universe::narrow_oop_mode_to_string(Universe::NARROW_OOP_MODE mode) { |
| 982 switch (mode) { | |
| 983 case UnscaledNarrowOop: | |
| 984 return "32-bits Oops"; | |
| 985 case ZeroBasedNarrowOop: | |
| 986 return "zero based Compressed Oops"; | |
| 987 case HeapBasedNarrowOop: | |
| 988 return "Compressed Oops with base"; | |
| 989 } | |
| 990 | |
| 991 ShouldNotReachHere(); | |
| 992 return ""; | |
| 993 } | |
| 994 | |
| 995 | |
| 996 Universe::NARROW_OOP_MODE Universe::narrow_oop_mode() { | |
| 997 if (narrow_oop_base() != 0) { | |
| 998 return HeapBasedNarrowOop; | |
| 999 } | |
| 1000 | |
| 1001 if (narrow_oop_shift() != 0) { | |
| 1002 return ZeroBasedNarrowOop; | |
| 1003 } | |
| 1004 | |
| 1005 return UnscaledNarrowOop; | |
| 1006 } | |
| 1007 | |
| 0 | 1008 |
| 1009 void universe2_init() { | |
| 1010 EXCEPTION_MARK; | |
| 1011 Universe::genesis(CATCH); | |
| 1012 } | |
| 1013 | |
| 1014 | |
| 1015 // This function is defined in JVM.cpp | |
| 1016 extern void initialize_converter_functions(); | |
| 1017 | |
| 1018 bool universe_post_init() { | |
|
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1019 assert(!is_init_completed(), "Error: initialization not yet completed!"); |
| 0 | 1020 Universe::_fully_initialized = true; |
| 1021 EXCEPTION_MARK; | |
| 1022 { ResourceMark rm; | |
| 1023 Interpreter::initialize(); // needed for interpreter entry points | |
| 1024 if (!UseSharedSpaces) { | |
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1025 HandleMark hm(THREAD); |
| 1142 | 1026 KlassHandle ok_h(THREAD, SystemDictionary::Object_klass()); |
| 0 | 1027 Universe::reinitialize_vtable_of(ok_h, CHECK_false); |
| 1028 Universe::reinitialize_itables(CHECK_false); | |
| 1029 } | |
| 1030 } | |
| 1031 | |
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1032 HandleMark hm(THREAD); |
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1033 Klass* k; |
| 0 | 1034 instanceKlassHandle k_h; |
| 1035 // Setup preallocated empty java.lang.Class array | |
| 1142 | 1036 Universe::_the_empty_class_klass_array = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_false); |
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1037 |
| 0 | 1038 // Setup preallocated OutOfMemoryError errors |
|
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1039 k = SystemDictionary::resolve_or_fail(vmSymbols::java_lang_OutOfMemoryError(), true, CHECK_false); |
| 0 | 1040 k_h = instanceKlassHandle(THREAD, k); |
|
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1041 Universe::_out_of_memory_error_java_heap = k_h->allocate_instance(CHECK_false); |
|
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1042 Universe::_out_of_memory_error_metaspace = k_h->allocate_instance(CHECK_false); |
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1043 Universe::_out_of_memory_error_class_metaspace = k_h->allocate_instance(CHECK_false); |
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1044 Universe::_out_of_memory_error_array_size = k_h->allocate_instance(CHECK_false); |
| 0 | 1045 Universe::_out_of_memory_error_gc_overhead_limit = |
|
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1046 k_h->allocate_instance(CHECK_false); |
| 0 | 1047 |
| 1048 // Setup preallocated NullPointerException | |
| 1049 // (this is currently used for a cheap & dirty solution in compiler exception handling) | |
|
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1050 k = SystemDictionary::resolve_or_fail(vmSymbols::java_lang_NullPointerException(), true, CHECK_false); |
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1051 Universe::_null_ptr_exception_instance = InstanceKlass::cast(k)->allocate_instance(CHECK_false); |
| 0 | 1052 // Setup preallocated ArithmeticException |
| 1053 // (this is currently used for a cheap & dirty solution in compiler exception handling) | |
|
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1054 k = SystemDictionary::resolve_or_fail(vmSymbols::java_lang_ArithmeticException(), true, CHECK_false); |
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1055 Universe::_arithmetic_exception_instance = InstanceKlass::cast(k)->allocate_instance(CHECK_false); |
| 0 | 1056 // Virtual Machine Error for when we get into a situation we can't resolve |
| 1057 k = SystemDictionary::resolve_or_fail( | |
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1058 vmSymbols::java_lang_VirtualMachineError(), true, CHECK_false); |
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1059 bool linked = InstanceKlass::cast(k)->link_class_or_fail(CHECK_false); |
| 0 | 1060 if (!linked) { |
| 1061 tty->print_cr("Unable to link/verify VirtualMachineError class"); | |
| 1062 return false; // initialization failed | |
| 1063 } | |
| 1064 Universe::_virtual_machine_error_instance = | |
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1065 InstanceKlass::cast(k)->allocate_instance(CHECK_false); |
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1066 |
|
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1067 Universe::_vm_exception = InstanceKlass::cast(k)->allocate_instance(CHECK_false); |
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1068 |
| 0 | 1069 if (!DumpSharedSpaces) { |
| 1070 // These are the only Java fields that are currently set during shared space dumping. | |
| 1071 // We prefer to not handle this generally, so we always reinitialize these detail messages. | |
| 1072 Handle msg = java_lang_String::create_from_str("Java heap space", CHECK_false); | |
| 1073 java_lang_Throwable::set_message(Universe::_out_of_memory_error_java_heap, msg()); | |
| 1074 | |
|
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1075 msg = java_lang_String::create_from_str("Metaspace", CHECK_false); |
|
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1076 java_lang_Throwable::set_message(Universe::_out_of_memory_error_metaspace, msg()); |
|
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1077 msg = java_lang_String::create_from_str("Compressed class space", CHECK_false); |
|
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1078 java_lang_Throwable::set_message(Universe::_out_of_memory_error_class_metaspace, msg()); |
| 0 | 1079 |
| 1080 msg = java_lang_String::create_from_str("Requested array size exceeds VM limit", CHECK_false); | |
| 1081 java_lang_Throwable::set_message(Universe::_out_of_memory_error_array_size, msg()); | |
| 1082 | |
| 1083 msg = java_lang_String::create_from_str("GC overhead limit exceeded", CHECK_false); | |
| 1084 java_lang_Throwable::set_message(Universe::_out_of_memory_error_gc_overhead_limit, msg()); | |
| 1085 | |
| 1086 msg = java_lang_String::create_from_str("/ by zero", CHECK_false); | |
| 1087 java_lang_Throwable::set_message(Universe::_arithmetic_exception_instance, msg()); | |
| 1088 | |
| 1089 // Setup the array of errors that have preallocated backtrace | |
| 1090 k = Universe::_out_of_memory_error_java_heap->klass(); | |
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1091 assert(k->name() == vmSymbols::java_lang_OutOfMemoryError(), "should be out of memory error"); |
| 0 | 1092 k_h = instanceKlassHandle(THREAD, k); |
| 1093 | |
| 1094 int len = (StackTraceInThrowable) ? (int)PreallocatedOutOfMemoryErrorCount : 0; | |
| 1095 Universe::_preallocated_out_of_memory_error_array = oopFactory::new_objArray(k_h(), len, CHECK_false); | |
| 1096 for (int i=0; i<len; i++) { | |
|
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1097 oop err = k_h->allocate_instance(CHECK_false); |
| 0 | 1098 Handle err_h = Handle(THREAD, err); |
| 1099 java_lang_Throwable::allocate_backtrace(err_h, CHECK_false); | |
| 1100 Universe::preallocated_out_of_memory_errors()->obj_at_put(i, err_h()); | |
| 1101 } | |
| 1102 Universe::_preallocated_out_of_memory_error_avail_count = (jint)len; | |
| 1103 } | |
| 1104 | |
| 1105 | |
| 1106 // Setup static method for registering finalizers | |
| 1107 // The finalizer klass must be linked before looking up the method, in | |
| 1108 // case it needs to get rewritten. | |
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1109 InstanceKlass::cast(SystemDictionary::Finalizer_klass())->link_class(CHECK_false); |
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1110 Method* m = InstanceKlass::cast(SystemDictionary::Finalizer_klass())->find_method( |
| 0 | 1111 vmSymbols::register_method_name(), |
| 1112 vmSymbols::register_method_signature()); | |
| 1113 if (m == NULL || !m->is_static()) { | |
|
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1114 tty->print_cr("Unable to link/verify Finalizer.register method"); |
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1115 return false; // initialization failed (cannot throw exception yet) |
| 0 | 1116 } |
| 1117 Universe::_finalizer_register_cache->init( | |
|
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1118 SystemDictionary::Finalizer_klass(), m); |
| 0 | 1119 |
|
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1120 InstanceKlass::cast(SystemDictionary::misc_Unsafe_klass())->link_class(CHECK_false); |
|
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1121 m = InstanceKlass::cast(SystemDictionary::misc_Unsafe_klass())->find_method( |
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1122 vmSymbols::throwIllegalAccessError_name(), |
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1123 vmSymbols::void_method_signature()); |
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1124 if (m != NULL && !m->is_static()) { |
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1125 // Note null is okay; this method is used in itables, and if it is null, |
|
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1126 // then AbstractMethodError is thrown instead. |
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1127 tty->print_cr("Unable to link/verify Unsafe.throwIllegalAccessError method"); |
|
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1128 return false; // initialization failed (cannot throw exception yet) |
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1129 } |
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1130 Universe::_throw_illegal_access_error = m; |
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1131 |
|
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1132 // Setup method for registering loaded classes in class loader vector |
|
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1133 InstanceKlass::cast(SystemDictionary::ClassLoader_klass())->link_class(CHECK_false); |
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1134 m = InstanceKlass::cast(SystemDictionary::ClassLoader_klass())->find_method(vmSymbols::addClass_name(), vmSymbols::class_void_signature()); |
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1135 if (m == NULL || m->is_static()) { |
|
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1136 tty->print_cr("Unable to link/verify ClassLoader.addClass method"); |
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1137 return false; // initialization failed (cannot throw exception yet) |
|
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1138 } |
|
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1139 Universe::_loader_addClass_cache->init( |
|
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1140 SystemDictionary::ClassLoader_klass(), m); |
|
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1141 |
| 11010 | 1142 // Setup method for checking protection domain |
| 1143 InstanceKlass::cast(SystemDictionary::ProtectionDomain_klass())->link_class(CHECK_false); | |
| 1144 m = InstanceKlass::cast(SystemDictionary::ProtectionDomain_klass())-> | |
| 1145 find_method(vmSymbols::impliesCreateAccessControlContext_name(), | |
| 1146 vmSymbols::void_boolean_signature()); | |
| 1147 // Allow NULL which should only happen with bootstrapping. | |
| 1148 if (m != NULL) { | |
| 1149 if (m->is_static()) { | |
| 1150 // NoSuchMethodException doesn't actually work because it tries to run the | |
| 1151 // <init> function before java_lang_Class is linked. Print error and exit. | |
| 1152 tty->print_cr("ProtectionDomain.impliesCreateAccessControlContext() has the wrong linkage"); | |
| 1153 return false; // initialization failed | |
| 1154 } | |
| 1155 Universe::_pd_implies_cache->init( | |
|
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1156 SystemDictionary::ProtectionDomain_klass(), m);; |
| 11010 | 1157 } |
| 1158 | |
| 0 | 1159 // The folowing is initializing converter functions for serialization in |
| 1160 // JVM.cpp. If we clean up the StrictMath code above we may want to find | |
| 1161 // a better solution for this as well. | |
| 1162 initialize_converter_functions(); | |
| 1163 | |
| 1164 // This needs to be done before the first scavenge/gc, since | |
| 1165 // it's an input to soft ref clearing policy. | |
|
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1166 { |
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1167 MutexLocker x(Heap_lock); |
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1168 Universe::update_heap_info_at_gc(); |
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1169 } |
| 0 | 1170 |
| 1171 // ("weak") refs processing infrastructure initialization | |
| 1172 Universe::heap()->post_initialize(); | |
| 1173 | |
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1174 // Initialize performance counters for metaspaces |
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1175 MetaspaceCounters::initialize_performance_counters(); |
|
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1176 CompressedClassSpaceCounters::initialize_performance_counters(); |
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1177 |
|
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1178 MemoryService::add_metaspace_memory_pools(); |
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1179 |
| 0 | 1180 MemoryService::set_universe_heap(Universe::_collectedHeap); |
|
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1181 #if INCLUDE_CDS |
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1182 if (UseSharedSpaces) { |
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1183 SharedClassUtil::initialize(CHECK_false); |
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1184 } |
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1185 #endif |
| 0 | 1186 return true; |
| 1187 } | |
| 1188 | |
| 1189 | |
| 1190 void Universe::compute_base_vtable_size() { | |
| 1191 _base_vtable_size = ClassLoader::compute_Object_vtable(); | |
| 1192 } | |
| 1193 | |
| 1194 | |
| 1195 // %%% The Universe::flush_foo methods belong in CodeCache. | |
| 1196 | |
| 1197 // Flushes compiled methods dependent on dependee. | |
| 1198 void Universe::flush_dependents_on(instanceKlassHandle dependee) { | |
| 1199 assert_lock_strong(Compile_lock); | |
| 1200 | |
| 1201 if (CodeCache::number_of_nmethods_with_dependencies() == 0) return; | |
| 1202 | |
| 1203 // CodeCache can only be updated by a thread_in_VM and they will all be | |
| 1204 // stopped dring the safepoint so CodeCache will be safe to update without | |
| 1205 // holding the CodeCache_lock. | |
| 1206 | |
|
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1207 KlassDepChange changes(dependee); |
| 0 | 1208 |
| 1209 // Compute the dependent nmethods | |
| 1210 if (CodeCache::mark_for_deoptimization(changes) > 0) { | |
| 1211 // At least one nmethod has been marked for deoptimization | |
| 1212 VM_Deoptimize op; | |
| 1213 VMThread::execute(&op); | |
| 1214 } | |
| 1215 } | |
| 1216 | |
|
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1217 // Flushes compiled methods dependent on a particular CallSite |
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1218 // instance when its target is different than the given MethodHandle. |
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1219 void Universe::flush_dependents_on(Handle call_site, Handle method_handle) { |
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1220 assert_lock_strong(Compile_lock); |
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1221 |
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1222 if (CodeCache::number_of_nmethods_with_dependencies() == 0) return; |
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1223 |
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1224 // CodeCache can only be updated by a thread_in_VM and they will all be |
|
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1225 // stopped dring the safepoint so CodeCache will be safe to update without |
|
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1226 // holding the CodeCache_lock. |
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1227 |
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1228 CallSiteDepChange changes(call_site(), method_handle()); |
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1229 |
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1230 // Compute the dependent nmethods that have a reference to a |
|
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1231 // CallSite object. We use InstanceKlass::mark_dependent_nmethod |
|
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1232 // directly instead of CodeCache::mark_for_deoptimization because we |
|
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1233 // want dependents on the call site class only not all classes in |
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1234 // the ContextStream. |
|
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1235 int marked = 0; |
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1236 { |
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1237 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); |
|
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1238 InstanceKlass* call_site_klass = InstanceKlass::cast(call_site->klass()); |
|
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1239 marked = call_site_klass->mark_dependent_nmethods(changes); |
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1240 } |
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1241 if (marked > 0) { |
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1242 // At least one nmethod has been marked for deoptimization |
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1243 VM_Deoptimize op; |
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1244 VMThread::execute(&op); |
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1245 } |
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1246 } |
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1247 |
| 0 | 1248 #ifdef HOTSWAP |
| 1249 // Flushes compiled methods dependent on dependee in the evolutionary sense | |
| 1250 void Universe::flush_evol_dependents_on(instanceKlassHandle ev_k_h) { | |
| 1251 // --- Compile_lock is not held. However we are at a safepoint. | |
| 1252 assert_locked_or_safepoint(Compile_lock); | |
| 1253 if (CodeCache::number_of_nmethods_with_dependencies() == 0) return; | |
| 1254 | |
| 1255 // CodeCache can only be updated by a thread_in_VM and they will all be | |
| 1256 // stopped dring the safepoint so CodeCache will be safe to update without | |
| 1257 // holding the CodeCache_lock. | |
| 1258 | |
| 1259 // Compute the dependent nmethods | |
| 1260 if (CodeCache::mark_for_evol_deoptimization(ev_k_h) > 0) { | |
| 1261 // At least one nmethod has been marked for deoptimization | |
| 1262 | |
| 1263 // All this already happens inside a VM_Operation, so we'll do all the work here. | |
| 1264 // Stuff copied from VM_Deoptimize and modified slightly. | |
| 1265 | |
| 1266 // We do not want any GCs to happen while we are in the middle of this VM operation | |
| 1267 ResourceMark rm; | |
| 1268 DeoptimizationMarker dm; | |
| 1269 | |
| 1270 // Deoptimize all activations depending on marked nmethods | |
| 1271 Deoptimization::deoptimize_dependents(); | |
| 1272 | |
| 1273 // Make the dependent methods not entrant (in VM_Deoptimize they are made zombies) | |
| 1274 CodeCache::make_marked_nmethods_not_entrant(); | |
| 1275 } | |
| 1276 } | |
| 1277 #endif // HOTSWAP | |
| 1278 | |
| 1279 | |
| 1280 // Flushes compiled methods dependent on dependee | |
| 1281 void Universe::flush_dependents_on_method(methodHandle m_h) { | |
| 1282 // --- Compile_lock is not held. However we are at a safepoint. | |
| 1283 assert_locked_or_safepoint(Compile_lock); | |
| 1284 | |
| 1285 // CodeCache can only be updated by a thread_in_VM and they will all be | |
| 1286 // stopped dring the safepoint so CodeCache will be safe to update without | |
| 1287 // holding the CodeCache_lock. | |
| 1288 | |
| 1289 // Compute the dependent nmethods | |
| 1290 if (CodeCache::mark_for_deoptimization(m_h()) > 0) { | |
| 1291 // At least one nmethod has been marked for deoptimization | |
| 1292 | |
| 1293 // All this already happens inside a VM_Operation, so we'll do all the work here. | |
| 1294 // Stuff copied from VM_Deoptimize and modified slightly. | |
| 1295 | |
| 1296 // We do not want any GCs to happen while we are in the middle of this VM operation | |
| 1297 ResourceMark rm; | |
| 1298 DeoptimizationMarker dm; | |
| 1299 | |
| 1300 // Deoptimize all activations depending on marked nmethods | |
| 1301 Deoptimization::deoptimize_dependents(); | |
| 1302 | |
| 1303 // Make the dependent methods not entrant (in VM_Deoptimize they are made zombies) | |
| 1304 CodeCache::make_marked_nmethods_not_entrant(); | |
| 1305 } | |
| 1306 } | |
| 1307 | |
|
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1308 void Universe::print() { |
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1309 print_on(gclog_or_tty); |
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1310 } |
| 0 | 1311 |
|
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1312 void Universe::print_on(outputStream* st, bool extended) { |
| 0 | 1313 st->print_cr("Heap"); |
|
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1314 if (!extended) { |
|
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1315 heap()->print_on(st); |
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1316 } else { |
|
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1317 heap()->print_extended_on(st); |
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1318 } |
| 0 | 1319 } |
| 1320 | |
| 1321 void Universe::print_heap_at_SIGBREAK() { | |
| 1322 if (PrintHeapAtSIGBREAK) { | |
| 1323 MutexLocker hl(Heap_lock); | |
| 1324 print_on(tty); | |
| 1325 tty->cr(); | |
| 1326 tty->flush(); | |
| 1327 } | |
| 1328 } | |
| 1329 | |
| 4944 | 1330 void Universe::print_heap_before_gc(outputStream* st, bool ignore_extended) { |
| 0 | 1331 st->print_cr("{Heap before GC invocations=%u (full %u):", |
| 1332 heap()->total_collections(), | |
| 1333 heap()->total_full_collections()); | |
| 4944 | 1334 if (!PrintHeapAtGCExtended || ignore_extended) { |
|
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1335 heap()->print_on(st); |
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1336 } else { |
|
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1337 heap()->print_extended_on(st); |
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1338 } |
| 0 | 1339 } |
| 1340 | |
| 4944 | 1341 void Universe::print_heap_after_gc(outputStream* st, bool ignore_extended) { |
| 0 | 1342 st->print_cr("Heap after GC invocations=%u (full %u):", |
| 1343 heap()->total_collections(), | |
| 1344 heap()->total_full_collections()); | |
| 4944 | 1345 if (!PrintHeapAtGCExtended || ignore_extended) { |
|
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1346 heap()->print_on(st); |
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1347 } else { |
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1348 heap()->print_extended_on(st); |
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1349 } |
| 0 | 1350 st->print_cr("}"); |
| 1351 } | |
| 1352 | |
|
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1353 void Universe::verify(VerifyOption option, const char* prefix, bool silent) { |
| 0 | 1354 // The use of _verify_in_progress is a temporary work around for |
| 1355 // 6320749. Don't bother with a creating a class to set and clear | |
| 1356 // it since it is only used in this method and the control flow is | |
| 1357 // straight forward. | |
| 1358 _verify_in_progress = true; | |
| 1359 | |
| 1360 COMPILER2_PRESENT( | |
| 1361 assert(!DerivedPointerTable::is_active(), | |
| 1362 "DPT should not be active during verification " | |
| 1363 "(of thread stacks below)"); | |
| 1364 ) | |
| 1365 | |
| 1366 ResourceMark rm; | |
| 1367 HandleMark hm; // Handles created during verification can be zapped | |
| 1368 _verify_count++; | |
| 1369 | |
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1370 if (!silent) gclog_or_tty->print("%s", prefix); |
| 0 | 1371 if (!silent) gclog_or_tty->print("[Verifying "); |
| 1372 if (!silent) gclog_or_tty->print("threads "); | |
| 1373 Threads::verify(); | |
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1374 if (!silent) gclog_or_tty->print("heap "); |
| 6008 | 1375 heap()->verify(silent, option); |
| 0 | 1376 if (!silent) gclog_or_tty->print("syms "); |
| 1377 SymbolTable::verify(); | |
| 1378 if (!silent) gclog_or_tty->print("strs "); | |
| 1379 StringTable::verify(); | |
| 1380 { | |
| 1381 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); | |
| 1382 if (!silent) gclog_or_tty->print("zone "); | |
| 1383 CodeCache::verify(); | |
| 1384 } | |
| 1385 if (!silent) gclog_or_tty->print("dict "); | |
| 1386 SystemDictionary::verify(); | |
|
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1387 #ifndef PRODUCT |
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1388 if (!silent) gclog_or_tty->print("cldg "); |
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1389 ClassLoaderDataGraph::verify(); |
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1390 #endif |
|
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1391 if (!silent) gclog_or_tty->print("metaspace chunks "); |
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1392 MetaspaceAux::verify_free_chunks(); |
| 0 | 1393 if (!silent) gclog_or_tty->print("hand "); |
| 1394 JNIHandles::verify(); | |
| 1395 if (!silent) gclog_or_tty->print("C-heap "); | |
| 1396 os::check_heap(); | |
|
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1397 if (!silent) gclog_or_tty->print("code cache "); |
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1398 CodeCache::verify_oops(); |
| 0 | 1399 if (!silent) gclog_or_tty->print_cr("]"); |
| 1400 | |
| 1401 _verify_in_progress = false; | |
| 1402 } | |
| 1403 | |
| 1404 // Oop verification (see MacroAssembler::verify_oop) | |
| 1405 | |
| 1406 static uintptr_t _verify_oop_data[2] = {0, (uintptr_t)-1}; | |
| 1407 static uintptr_t _verify_klass_data[2] = {0, (uintptr_t)-1}; | |
| 1408 | |
| 1409 | |
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1410 #ifndef PRODUCT |
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1411 |
| 0 | 1412 static void calculate_verify_data(uintptr_t verify_data[2], |
| 1413 HeapWord* low_boundary, | |
| 1414 HeapWord* high_boundary) { | |
| 1415 assert(low_boundary < high_boundary, "bad interval"); | |
| 1416 | |
| 1417 // decide which low-order bits we require to be clear: | |
| 1418 size_t alignSize = MinObjAlignmentInBytes; | |
|
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1419 size_t min_object_size = CollectedHeap::min_fill_size(); |
| 0 | 1420 |
| 1421 // make an inclusive limit: | |
| 1422 uintptr_t max = (uintptr_t)high_boundary - min_object_size*wordSize; | |
| 1423 uintptr_t min = (uintptr_t)low_boundary; | |
| 1424 assert(min < max, "bad interval"); | |
| 1425 uintptr_t diff = max ^ min; | |
| 1426 | |
| 1427 // throw away enough low-order bits to make the diff vanish | |
| 1428 uintptr_t mask = (uintptr_t)(-1); | |
| 1429 while ((mask & diff) != 0) | |
| 1430 mask <<= 1; | |
| 1431 uintptr_t bits = (min & mask); | |
| 1432 assert(bits == (max & mask), "correct mask"); | |
| 1433 // check an intermediate value between min and max, just to make sure: | |
| 1434 assert(bits == ((min + (max-min)/2) & mask), "correct mask"); | |
| 1435 | |
| 1436 // require address alignment, too: | |
| 1437 mask |= (alignSize - 1); | |
| 1438 | |
| 1439 if (!(verify_data[0] == 0 && verify_data[1] == (uintptr_t)-1)) { | |
| 1440 assert(verify_data[0] == mask && verify_data[1] == bits, "mask stability"); | |
| 1441 } | |
| 1442 verify_data[0] = mask; | |
| 1443 verify_data[1] = bits; | |
| 1444 } | |
| 1445 | |
| 1446 // Oop verification (see MacroAssembler::verify_oop) | |
| 1447 | |
| 1448 uintptr_t Universe::verify_oop_mask() { | |
| 1449 MemRegion m = heap()->reserved_region(); | |
| 1450 calculate_verify_data(_verify_oop_data, | |
| 1451 m.start(), | |
| 1452 m.end()); | |
| 1453 return _verify_oop_data[0]; | |
| 1454 } | |
| 1455 | |
| 1456 | |
| 1457 | |
| 1458 uintptr_t Universe::verify_oop_bits() { | |
| 1459 verify_oop_mask(); | |
| 1460 return _verify_oop_data[1]; | |
| 1461 } | |
| 1462 | |
| 1463 uintptr_t Universe::verify_mark_mask() { | |
| 1464 return markOopDesc::lock_mask_in_place; | |
| 1465 } | |
| 1466 | |
| 1467 uintptr_t Universe::verify_mark_bits() { | |
| 1468 intptr_t mask = verify_mark_mask(); | |
| 1469 intptr_t bits = (intptr_t)markOopDesc::prototype(); | |
| 1470 assert((bits & ~mask) == 0, "no stray header bits"); | |
| 1471 return bits; | |
| 1472 } | |
| 1473 #endif // PRODUCT | |
| 1474 | |
| 1475 | |
| 1476 void Universe::compute_verify_oop_data() { | |
| 1477 verify_oop_mask(); | |
| 1478 verify_oop_bits(); | |
| 1479 verify_mark_mask(); | |
| 1480 verify_mark_bits(); | |
| 1481 } | |
| 1482 | |
| 1483 | |
|
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1484 void LatestMethodCache::init(Klass* k, Method* m) { |
| 0 | 1485 if (!UseSharedSpaces) { |
| 1486 _klass = k; | |
| 1487 } | |
| 1488 #ifndef PRODUCT | |
| 1489 else { | |
| 1490 // sharing initilization should have already set up _klass | |
| 1491 assert(_klass != NULL, "just checking"); | |
| 1492 } | |
| 1493 #endif | |
| 1494 | |
| 1495 _method_idnum = m->method_idnum(); | |
| 1496 assert(_method_idnum >= 0, "sanity check"); | |
| 1497 } | |
| 1498 | |
| 1499 | |
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1500 Method* LatestMethodCache::get_method() { |
| 11010 | 1501 if (klass() == NULL) return NULL; |
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1502 InstanceKlass* ik = InstanceKlass::cast(klass()); |
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1503 Method* m = ik->method_with_idnum(method_idnum()); |
| 0 | 1504 assert(m != NULL, "sanity check"); |
| 1505 return m; | |
| 1506 } | |
| 1507 | |
| 1508 | |
| 1509 #ifdef ASSERT | |
| 1510 // Release dummy object(s) at bottom of heap | |
| 1511 bool Universe::release_fullgc_alot_dummy() { | |
| 1512 MutexLocker ml(FullGCALot_lock); | |
| 1513 if (_fullgc_alot_dummy_array != NULL) { | |
| 1514 if (_fullgc_alot_dummy_next >= _fullgc_alot_dummy_array->length()) { | |
| 1515 // No more dummies to release, release entire array instead | |
| 1516 _fullgc_alot_dummy_array = NULL; | |
| 1517 return false; | |
| 1518 } | |
| 1519 if (!UseConcMarkSweepGC) { | |
| 1520 // Release dummy at bottom of old generation | |
| 1521 _fullgc_alot_dummy_array->obj_at_put(_fullgc_alot_dummy_next++, NULL); | |
| 1522 } | |
| 1523 // Release dummy at bottom of permanent generation | |
| 1524 _fullgc_alot_dummy_array->obj_at_put(_fullgc_alot_dummy_next++, NULL); | |
| 1525 } | |
| 1526 return true; | |
| 1527 } | |
| 1528 | |
| 1529 #endif // ASSERT |