Mercurial > hg > truffle
annotate src/share/vm/memory/universe.cpp @ 10358:0def34ab1c98
8015007: Incorrect print format in error message for VM cannot allocate the requested heap
Summary: Correct the wrong print format in error message for VM cannot allocate the requested heap; and clean up the error message call in check_alignment()
Reviewed-by: brutisso, tschatzl
Contributed-by: tamao <tao.mao@oracle.com>
| author | tamao |
|---|---|
| date | Tue, 21 May 2013 16:43:41 -0700 |
| parents | 92ef81e2f571 |
| children | f2110083203d eaf3742822ec |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved. |
| 0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #include "precompiled.hpp" |
| 26 #include "classfile/classLoader.hpp" | |
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27 #include "classfile/classLoaderData.hpp" |
| 1972 | 28 #include "classfile/javaClasses.hpp" |
| 29 #include "classfile/symbolTable.hpp" | |
| 30 #include "classfile/systemDictionary.hpp" | |
| 31 #include "classfile/vmSymbols.hpp" | |
| 32 #include "code/codeCache.hpp" | |
| 33 #include "code/dependencies.hpp" | |
| 34 #include "gc_interface/collectedHeap.inline.hpp" | |
| 35 #include "interpreter/interpreter.hpp" | |
| 36 #include "memory/cardTableModRefBS.hpp" | |
| 37 #include "memory/gcLocker.inline.hpp" | |
| 38 #include "memory/genCollectedHeap.hpp" | |
| 39 #include "memory/genRemSet.hpp" | |
| 40 #include "memory/generation.hpp" | |
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41 #include "memory/metadataFactory.hpp" |
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42 #include "memory/metaspaceShared.hpp" |
| 1972 | 43 #include "memory/oopFactory.hpp" |
| 44 #include "memory/space.hpp" | |
| 45 #include "memory/universe.hpp" | |
| 46 #include "memory/universe.inline.hpp" | |
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47 #include "oops/constantPool.hpp" |
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48 #include "oops/instanceClassLoaderKlass.hpp" |
| 1972 | 49 #include "oops/instanceKlass.hpp" |
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50 #include "oops/instanceMirrorKlass.hpp" |
| 1972 | 51 #include "oops/instanceRefKlass.hpp" |
| 52 #include "oops/oop.inline.hpp" | |
| 53 #include "oops/typeArrayKlass.hpp" | |
| 54 #include "prims/jvmtiRedefineClassesTrace.hpp" | |
| 55 #include "runtime/aprofiler.hpp" | |
| 56 #include "runtime/arguments.hpp" | |
| 57 #include "runtime/deoptimization.hpp" | |
| 58 #include "runtime/fprofiler.hpp" | |
| 59 #include "runtime/handles.inline.hpp" | |
| 60 #include "runtime/init.hpp" | |
| 61 #include "runtime/java.hpp" | |
| 62 #include "runtime/javaCalls.hpp" | |
| 63 #include "runtime/sharedRuntime.hpp" | |
| 64 #include "runtime/synchronizer.hpp" | |
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65 #include "runtime/thread.inline.hpp" |
| 1972 | 66 #include "runtime/timer.hpp" |
| 67 #include "runtime/vm_operations.hpp" | |
| 68 #include "services/memoryService.hpp" | |
| 69 #include "utilities/copy.hpp" | |
| 70 #include "utilities/events.hpp" | |
| 71 #include "utilities/hashtable.inline.hpp" | |
| 72 #include "utilities/preserveException.hpp" | |
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73 #include "utilities/macros.hpp" |
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74 #if INCLUDE_ALL_GCS |
| 1972 | 75 #include "gc_implementation/concurrentMarkSweep/cmsAdaptiveSizePolicy.hpp" |
| 76 #include "gc_implementation/concurrentMarkSweep/cmsCollectorPolicy.hpp" | |
| 77 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp" | |
| 78 #include "gc_implementation/g1/g1CollectorPolicy.hpp" | |
| 79 #include "gc_implementation/parallelScavenge/parallelScavengeHeap.hpp" | |
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80 #endif // INCLUDE_ALL_GCS |
| 0 | 81 |
| 82 // Known objects | |
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83 Klass* Universe::_boolArrayKlassObj = NULL; |
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84 Klass* Universe::_byteArrayKlassObj = NULL; |
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85 Klass* Universe::_charArrayKlassObj = NULL; |
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86 Klass* Universe::_intArrayKlassObj = NULL; |
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87 Klass* Universe::_shortArrayKlassObj = NULL; |
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88 Klass* Universe::_longArrayKlassObj = NULL; |
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89 Klass* Universe::_singleArrayKlassObj = NULL; |
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90 Klass* Universe::_doubleArrayKlassObj = NULL; |
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91 Klass* Universe::_typeArrayKlassObjs[T_VOID+1] = { NULL /*, NULL...*/ }; |
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92 Klass* Universe::_objectArrayKlassObj = NULL; |
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93 oop Universe::_int_mirror = NULL; |
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94 oop Universe::_float_mirror = NULL; |
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95 oop Universe::_double_mirror = NULL; |
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96 oop Universe::_byte_mirror = NULL; |
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97 oop Universe::_bool_mirror = NULL; |
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98 oop Universe::_char_mirror = NULL; |
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99 oop Universe::_long_mirror = NULL; |
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100 oop Universe::_short_mirror = NULL; |
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101 oop Universe::_void_mirror = NULL; |
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102 oop Universe::_mirrors[T_VOID+1] = { NULL /*, NULL...*/ }; |
| 0 | 103 oop Universe::_main_thread_group = NULL; |
| 104 oop Universe::_system_thread_group = NULL; | |
| 105 objArrayOop Universe::_the_empty_class_klass_array = NULL; | |
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106 Array<Klass*>* Universe::_the_array_interfaces_array = NULL; |
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107 oop Universe::_the_null_string = NULL; |
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108 oop Universe::_the_min_jint_string = NULL; |
| 0 | 109 LatestMethodOopCache* Universe::_finalizer_register_cache = NULL; |
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110 LatestMethodOopCache* Universe::_loader_addClass_cache = NULL; |
| 0 | 111 ActiveMethodOopsCache* Universe::_reflect_invoke_cache = NULL; |
| 112 oop Universe::_out_of_memory_error_java_heap = NULL; | |
| 113 oop Universe::_out_of_memory_error_perm_gen = NULL; | |
| 114 oop Universe::_out_of_memory_error_array_size = NULL; | |
| 115 oop Universe::_out_of_memory_error_gc_overhead_limit = NULL; | |
| 116 objArrayOop Universe::_preallocated_out_of_memory_error_array = NULL; | |
| 117 volatile jint Universe::_preallocated_out_of_memory_error_avail_count = 0; | |
| 118 bool Universe::_verify_in_progress = false; | |
| 119 oop Universe::_null_ptr_exception_instance = NULL; | |
| 120 oop Universe::_arithmetic_exception_instance = NULL; | |
| 121 oop Universe::_virtual_machine_error_instance = NULL; | |
| 122 oop Universe::_vm_exception = NULL; | |
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123 Array<int>* Universe::_the_empty_int_array = NULL; |
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124 Array<u2>* Universe::_the_empty_short_array = NULL; |
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125 Array<Klass*>* Universe::_the_empty_klass_array = NULL; |
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126 Array<Method*>* Universe::_the_empty_method_array = NULL; |
| 0 | 127 |
| 128 // These variables are guarded by FullGCALot_lock. | |
| 129 debug_only(objArrayOop Universe::_fullgc_alot_dummy_array = NULL;) | |
| 130 debug_only(int Universe::_fullgc_alot_dummy_next = 0;) | |
| 131 | |
| 132 // Heap | |
| 133 int Universe::_verify_count = 0; | |
| 134 | |
| 135 int Universe::_base_vtable_size = 0; | |
| 136 bool Universe::_bootstrapping = false; | |
| 137 bool Universe::_fully_initialized = false; | |
| 138 | |
| 139 size_t Universe::_heap_capacity_at_last_gc; | |
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140 size_t Universe::_heap_used_at_last_gc = 0; |
| 0 | 141 |
| 142 CollectedHeap* Universe::_collectedHeap = NULL; | |
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143 |
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144 NarrowPtrStruct Universe::_narrow_oop = { NULL, 0, true }; |
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145 NarrowPtrStruct Universe::_narrow_klass = { NULL, 0, true }; |
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146 address Universe::_narrow_ptrs_base; |
| 0 | 147 |
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148 size_t Universe::_class_metaspace_size; |
| 0 | 149 |
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150 void Universe::basic_type_classes_do(void f(Klass*)) { |
| 0 | 151 f(boolArrayKlassObj()); |
| 152 f(byteArrayKlassObj()); | |
| 153 f(charArrayKlassObj()); | |
| 154 f(intArrayKlassObj()); | |
| 155 f(shortArrayKlassObj()); | |
| 156 f(longArrayKlassObj()); | |
| 157 f(singleArrayKlassObj()); | |
| 158 f(doubleArrayKlassObj()); | |
| 159 } | |
| 160 | |
| 161 void Universe::oops_do(OopClosure* f, bool do_all) { | |
| 162 | |
| 163 f->do_oop((oop*) &_int_mirror); | |
| 164 f->do_oop((oop*) &_float_mirror); | |
| 165 f->do_oop((oop*) &_double_mirror); | |
| 166 f->do_oop((oop*) &_byte_mirror); | |
| 167 f->do_oop((oop*) &_bool_mirror); | |
| 168 f->do_oop((oop*) &_char_mirror); | |
| 169 f->do_oop((oop*) &_long_mirror); | |
| 170 f->do_oop((oop*) &_short_mirror); | |
| 171 f->do_oop((oop*) &_void_mirror); | |
| 172 | |
| 173 for (int i = T_BOOLEAN; i < T_VOID+1; i++) { | |
| 174 f->do_oop((oop*) &_mirrors[i]); | |
| 175 } | |
| 176 assert(_mirrors[0] == NULL && _mirrors[T_BOOLEAN - 1] == NULL, "checking"); | |
| 177 | |
| 178 f->do_oop((oop*)&_the_empty_class_klass_array); | |
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179 f->do_oop((oop*)&_the_null_string); |
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180 f->do_oop((oop*)&_the_min_jint_string); |
| 0 | 181 f->do_oop((oop*)&_out_of_memory_error_java_heap); |
| 182 f->do_oop((oop*)&_out_of_memory_error_perm_gen); | |
| 183 f->do_oop((oop*)&_out_of_memory_error_array_size); | |
| 184 f->do_oop((oop*)&_out_of_memory_error_gc_overhead_limit); | |
| 185 f->do_oop((oop*)&_preallocated_out_of_memory_error_array); | |
| 186 f->do_oop((oop*)&_null_ptr_exception_instance); | |
| 187 f->do_oop((oop*)&_arithmetic_exception_instance); | |
| 188 f->do_oop((oop*)&_virtual_machine_error_instance); | |
| 189 f->do_oop((oop*)&_main_thread_group); | |
| 190 f->do_oop((oop*)&_system_thread_group); | |
| 191 f->do_oop((oop*)&_vm_exception); | |
| 192 debug_only(f->do_oop((oop*)&_fullgc_alot_dummy_array);) | |
| 193 } | |
| 194 | |
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195 // Serialize metadata in and out of CDS archive, not oops. |
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196 void Universe::serialize(SerializeClosure* f, bool do_all) { |
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197 |
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198 f->do_ptr((void**)&_boolArrayKlassObj); |
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199 f->do_ptr((void**)&_byteArrayKlassObj); |
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200 f->do_ptr((void**)&_charArrayKlassObj); |
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201 f->do_ptr((void**)&_intArrayKlassObj); |
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202 f->do_ptr((void**)&_shortArrayKlassObj); |
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203 f->do_ptr((void**)&_longArrayKlassObj); |
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204 f->do_ptr((void**)&_singleArrayKlassObj); |
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205 f->do_ptr((void**)&_doubleArrayKlassObj); |
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206 f->do_ptr((void**)&_objectArrayKlassObj); |
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207 |
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208 { |
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209 for (int i = 0; i < T_VOID+1; i++) { |
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210 if (_typeArrayKlassObjs[i] != NULL) { |
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211 assert(i >= T_BOOLEAN, "checking"); |
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212 f->do_ptr((void**)&_typeArrayKlassObjs[i]); |
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213 } else if (do_all) { |
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214 f->do_ptr((void**)&_typeArrayKlassObjs[i]); |
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215 } |
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216 } |
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217 } |
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218 |
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219 f->do_ptr((void**)&_the_array_interfaces_array); |
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220 f->do_ptr((void**)&_the_empty_int_array); |
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221 f->do_ptr((void**)&_the_empty_short_array); |
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222 f->do_ptr((void**)&_the_empty_method_array); |
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223 f->do_ptr((void**)&_the_empty_klass_array); |
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224 _finalizer_register_cache->serialize(f); |
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225 _loader_addClass_cache->serialize(f); |
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226 _reflect_invoke_cache->serialize(f); |
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227 } |
| 0 | 228 |
| 229 void Universe::check_alignment(uintx size, uintx alignment, const char* name) { | |
| 230 if (size < alignment || size % alignment != 0) { | |
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231 vm_exit_during_initialization( |
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232 err_msg("Size of %s (" UINTX_FORMAT " bytes) must be aligned to " UINTX_FORMAT " bytes", name, size, alignment)); |
| 0 | 233 } |
| 234 } | |
| 235 | |
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236 void initialize_basic_type_klass(Klass* k, TRAPS) { |
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237 Klass* ok = SystemDictionary::Object_klass(); |
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238 if (UseSharedSpaces) { |
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239 assert(k->super() == ok, "u3"); |
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240 k->restore_unshareable_info(CHECK); |
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241 } else { |
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242 k->initialize_supers(ok, CHECK); |
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243 } |
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244 k->append_to_sibling_list(); |
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245 } |
| 0 | 246 |
| 247 void Universe::genesis(TRAPS) { | |
| 248 ResourceMark rm; | |
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249 |
| 0 | 250 { FlagSetting fs(_bootstrapping, true); |
| 251 | |
| 252 { MutexLocker mc(Compile_lock); | |
| 253 | |
| 254 // determine base vtable size; without that we cannot create the array klasses | |
| 255 compute_base_vtable_size(); | |
| 256 | |
| 257 if (!UseSharedSpaces) { | |
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258 _boolArrayKlassObj = TypeArrayKlass::create_klass(T_BOOLEAN, sizeof(jboolean), CHECK); |
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259 _charArrayKlassObj = TypeArrayKlass::create_klass(T_CHAR, sizeof(jchar), CHECK); |
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260 _singleArrayKlassObj = TypeArrayKlass::create_klass(T_FLOAT, sizeof(jfloat), CHECK); |
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261 _doubleArrayKlassObj = TypeArrayKlass::create_klass(T_DOUBLE, sizeof(jdouble), CHECK); |
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262 _byteArrayKlassObj = TypeArrayKlass::create_klass(T_BYTE, sizeof(jbyte), CHECK); |
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263 _shortArrayKlassObj = TypeArrayKlass::create_klass(T_SHORT, sizeof(jshort), CHECK); |
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264 _intArrayKlassObj = TypeArrayKlass::create_klass(T_INT, sizeof(jint), CHECK); |
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265 _longArrayKlassObj = TypeArrayKlass::create_klass(T_LONG, sizeof(jlong), CHECK); |
| 0 | 266 |
| 267 _typeArrayKlassObjs[T_BOOLEAN] = _boolArrayKlassObj; | |
| 268 _typeArrayKlassObjs[T_CHAR] = _charArrayKlassObj; | |
| 269 _typeArrayKlassObjs[T_FLOAT] = _singleArrayKlassObj; | |
| 270 _typeArrayKlassObjs[T_DOUBLE] = _doubleArrayKlassObj; | |
| 271 _typeArrayKlassObjs[T_BYTE] = _byteArrayKlassObj; | |
| 272 _typeArrayKlassObjs[T_SHORT] = _shortArrayKlassObj; | |
| 273 _typeArrayKlassObjs[T_INT] = _intArrayKlassObj; | |
| 274 _typeArrayKlassObjs[T_LONG] = _longArrayKlassObj; | |
| 275 | |
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276 ClassLoaderData* null_cld = ClassLoaderData::the_null_class_loader_data(); |
| 0 | 277 |
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278 _the_array_interfaces_array = MetadataFactory::new_array<Klass*>(null_cld, 2, NULL, CHECK); |
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279 _the_empty_int_array = MetadataFactory::new_array<int>(null_cld, 0, CHECK); |
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280 _the_empty_short_array = MetadataFactory::new_array<u2>(null_cld, 0, CHECK); |
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281 _the_empty_method_array = MetadataFactory::new_array<Method*>(null_cld, 0, CHECK); |
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282 _the_empty_klass_array = MetadataFactory::new_array<Klass*>(null_cld, 0, CHECK); |
| 0 | 283 } |
| 284 } | |
| 285 | |
| 286 vmSymbols::initialize(CHECK); | |
| 287 | |
| 288 SystemDictionary::initialize(CHECK); | |
| 289 | |
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290 Klass* ok = SystemDictionary::Object_klass(); |
| 0 | 291 |
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292 _the_null_string = StringTable::intern("null", CHECK); |
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293 _the_min_jint_string = StringTable::intern("-2147483648", CHECK); |
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294 |
| 0 | 295 if (UseSharedSpaces) { |
| 296 // Verify shared interfaces array. | |
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297 assert(_the_array_interfaces_array->at(0) == |
| 1142 | 298 SystemDictionary::Cloneable_klass(), "u3"); |
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299 assert(_the_array_interfaces_array->at(1) == |
| 1142 | 300 SystemDictionary::Serializable_klass(), "u3"); |
| 0 | 301 } else { |
| 302 // Set up shared interfaces array. (Do this before supers are set up.) | |
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303 _the_array_interfaces_array->at_put(0, SystemDictionary::Cloneable_klass()); |
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304 _the_array_interfaces_array->at_put(1, SystemDictionary::Serializable_klass()); |
| 0 | 305 } |
| 306 | |
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307 initialize_basic_type_klass(boolArrayKlassObj(), CHECK); |
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308 initialize_basic_type_klass(charArrayKlassObj(), CHECK); |
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309 initialize_basic_type_klass(singleArrayKlassObj(), CHECK); |
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310 initialize_basic_type_klass(doubleArrayKlassObj(), CHECK); |
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311 initialize_basic_type_klass(byteArrayKlassObj(), CHECK); |
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312 initialize_basic_type_klass(shortArrayKlassObj(), CHECK); |
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313 initialize_basic_type_klass(intArrayKlassObj(), CHECK); |
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314 initialize_basic_type_klass(longArrayKlassObj(), CHECK); |
| 0 | 315 } // end of core bootstrapping |
| 316 | |
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317 // Maybe this could be lifted up now that object array can be initialized |
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318 // during the bootstrapping. |
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319 |
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320 // OLD |
| 0 | 321 // Initialize _objectArrayKlass after core bootstraping to make |
| 322 // sure the super class is set up properly for _objectArrayKlass. | |
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323 // --- |
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324 // NEW |
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325 // Since some of the old system object arrays have been converted to |
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326 // ordinary object arrays, _objectArrayKlass will be loaded when |
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327 // SystemDictionary::initialize(CHECK); is run. See the extra check |
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328 // for Object_klass_loaded in objArrayKlassKlass::allocate_objArray_klass_impl. |
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329 _objectArrayKlassObj = InstanceKlass:: |
| 1142 | 330 cast(SystemDictionary::Object_klass())->array_klass(1, CHECK); |
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331 // OLD |
| 0 | 332 // Add the class to the class hierarchy manually to make sure that |
| 333 // its vtable is initialized after core bootstrapping is completed. | |
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334 // --- |
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335 // New |
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336 // Have already been initialized. |
| 6983 | 337 _objectArrayKlassObj->append_to_sibling_list(); |
| 0 | 338 |
| 339 // Compute is_jdk version flags. | |
| 340 // Only 1.3 or later has the java.lang.Shutdown class. | |
| 341 // Only 1.4 or later has the java.lang.CharSequence interface. | |
| 342 // Only 1.5 or later has the java.lang.management.MemoryUsage class. | |
| 242 | 343 if (JDK_Version::is_partially_initialized()) { |
| 344 uint8_t jdk_version; | |
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345 Klass* k = SystemDictionary::resolve_or_null( |
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346 vmSymbols::java_lang_management_MemoryUsage(), THREAD); |
| 0 | 347 CLEAR_PENDING_EXCEPTION; // ignore exceptions |
| 348 if (k == NULL) { | |
| 242 | 349 k = SystemDictionary::resolve_or_null( |
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350 vmSymbols::java_lang_CharSequence(), THREAD); |
| 0 | 351 CLEAR_PENDING_EXCEPTION; // ignore exceptions |
| 352 if (k == NULL) { | |
| 242 | 353 k = SystemDictionary::resolve_or_null( |
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354 vmSymbols::java_lang_Shutdown(), THREAD); |
| 0 | 355 CLEAR_PENDING_EXCEPTION; // ignore exceptions |
| 356 if (k == NULL) { | |
| 242 | 357 jdk_version = 2; |
| 0 | 358 } else { |
| 242 | 359 jdk_version = 3; |
| 0 | 360 } |
| 361 } else { | |
| 242 | 362 jdk_version = 4; |
| 0 | 363 } |
| 364 } else { | |
| 242 | 365 jdk_version = 5; |
| 0 | 366 } |
| 242 | 367 JDK_Version::fully_initialize(jdk_version); |
| 0 | 368 } |
| 369 | |
| 370 #ifdef ASSERT | |
| 371 if (FullGCALot) { | |
| 372 // Allocate an array of dummy objects. | |
| 373 // We'd like these to be at the bottom of the old generation, | |
| 374 // so that when we free one and then collect, | |
| 375 // (almost) the whole heap moves | |
| 376 // and we find out if we actually update all the oops correctly. | |
| 377 // But we can't allocate directly in the old generation, | |
| 378 // so we allocate wherever, and hope that the first collection | |
| 379 // moves these objects to the bottom of the old generation. | |
| 380 // We can allocate directly in the permanent generation, so we do. | |
| 381 int size; | |
| 382 if (UseConcMarkSweepGC) { | |
| 383 warning("Using +FullGCALot with concurrent mark sweep gc " | |
| 384 "will not force all objects to relocate"); | |
| 385 size = FullGCALotDummies; | |
| 386 } else { | |
| 387 size = FullGCALotDummies * 2; | |
| 388 } | |
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389 objArrayOop naked_array = oopFactory::new_objArray(SystemDictionary::Object_klass(), size, CHECK); |
| 0 | 390 objArrayHandle dummy_array(THREAD, naked_array); |
| 391 int i = 0; | |
| 392 while (i < size) { | |
| 393 // Allocate dummy in old generation | |
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394 oop dummy = InstanceKlass::cast(SystemDictionary::Object_klass())->allocate_instance(CHECK); |
| 0 | 395 dummy_array->obj_at_put(i++, dummy); |
| 396 } | |
| 397 { | |
| 398 // Only modify the global variable inside the mutex. | |
| 399 // If we had a race to here, the other dummy_array instances | |
| 400 // and their elements just get dropped on the floor, which is fine. | |
| 401 MutexLocker ml(FullGCALot_lock); | |
| 402 if (_fullgc_alot_dummy_array == NULL) { | |
| 403 _fullgc_alot_dummy_array = dummy_array(); | |
| 404 } | |
| 405 } | |
| 406 assert(i == _fullgc_alot_dummy_array->length(), "just checking"); | |
| 407 } | |
| 408 #endif | |
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409 |
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410 // Initialize dependency array for null class loader |
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411 ClassLoaderData::the_null_class_loader_data()->init_dependencies(CHECK); |
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412 |
| 0 | 413 } |
| 414 | |
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415 // CDS support for patching vtables in metadata in the shared archive. |
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416 // All types inherited from Metadata have vtables, but not types inherited |
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417 // from MetaspaceObj, because the latter does not have virtual functions. |
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418 // If the metadata type has a vtable, it cannot be shared in the read-only |
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419 // section of the CDS archive, because the vtable pointer is patched. |
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420 static inline void add_vtable(void** list, int* n, void* o, int count) { |
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421 guarantee((*n) < count, "vtable list too small"); |
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422 void* vtable = dereference_vptr(o); |
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423 assert(*(void**)(vtable) != NULL, "invalid vtable"); |
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424 list[(*n)++] = vtable; |
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425 } |
| 0 | 426 |
| 427 void Universe::init_self_patching_vtbl_list(void** list, int count) { | |
| 428 int n = 0; | |
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429 { InstanceKlass o; add_vtable(list, &n, &o, count); } |
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430 { InstanceClassLoaderKlass o; add_vtable(list, &n, &o, count); } |
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431 { InstanceMirrorKlass o; add_vtable(list, &n, &o, count); } |
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432 { InstanceRefKlass o; add_vtable(list, &n, &o, count); } |
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433 { TypeArrayKlass o; add_vtable(list, &n, &o, count); } |
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434 { ObjArrayKlass o; add_vtable(list, &n, &o, count); } |
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435 { Method o; add_vtable(list, &n, &o, count); } |
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436 { ConstantPool o; add_vtable(list, &n, &o, count); } |
| 0 | 437 } |
| 438 | |
| 439 void Universe::initialize_basic_type_mirrors(TRAPS) { | |
| 440 assert(_int_mirror==NULL, "basic type mirrors already initialized"); | |
| 441 _int_mirror = | |
| 442 java_lang_Class::create_basic_type_mirror("int", T_INT, CHECK); | |
| 443 _float_mirror = | |
| 444 java_lang_Class::create_basic_type_mirror("float", T_FLOAT, CHECK); | |
| 445 _double_mirror = | |
| 446 java_lang_Class::create_basic_type_mirror("double", T_DOUBLE, CHECK); | |
| 447 _byte_mirror = | |
| 448 java_lang_Class::create_basic_type_mirror("byte", T_BYTE, CHECK); | |
| 449 _bool_mirror = | |
| 450 java_lang_Class::create_basic_type_mirror("boolean",T_BOOLEAN, CHECK); | |
| 451 _char_mirror = | |
| 452 java_lang_Class::create_basic_type_mirror("char", T_CHAR, CHECK); | |
| 453 _long_mirror = | |
| 454 java_lang_Class::create_basic_type_mirror("long", T_LONG, CHECK); | |
| 455 _short_mirror = | |
| 456 java_lang_Class::create_basic_type_mirror("short", T_SHORT, CHECK); | |
| 457 _void_mirror = | |
| 458 java_lang_Class::create_basic_type_mirror("void", T_VOID, CHECK); | |
| 459 | |
| 460 _mirrors[T_INT] = _int_mirror; | |
| 461 _mirrors[T_FLOAT] = _float_mirror; | |
| 462 _mirrors[T_DOUBLE] = _double_mirror; | |
| 463 _mirrors[T_BYTE] = _byte_mirror; | |
| 464 _mirrors[T_BOOLEAN] = _bool_mirror; | |
| 465 _mirrors[T_CHAR] = _char_mirror; | |
| 466 _mirrors[T_LONG] = _long_mirror; | |
| 467 _mirrors[T_SHORT] = _short_mirror; | |
| 468 _mirrors[T_VOID] = _void_mirror; | |
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469 //_mirrors[T_OBJECT] = InstanceKlass::cast(_object_klass)->java_mirror(); |
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470 //_mirrors[T_ARRAY] = InstanceKlass::cast(_object_klass)->java_mirror(); |
| 0 | 471 } |
| 472 | |
| 473 void Universe::fixup_mirrors(TRAPS) { | |
| 474 // Bootstrap problem: all classes gets a mirror (java.lang.Class instance) assigned eagerly, | |
| 475 // but we cannot do that for classes created before java.lang.Class is loaded. Here we simply | |
| 476 // walk over permanent objects created so far (mostly classes) and fixup their mirrors. Note | |
| 477 // that the number of objects allocated at this point is very small. | |
| 1142 | 478 assert(SystemDictionary::Class_klass_loaded(), "java.lang.Class should be loaded"); |
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479 HandleMark hm(THREAD); |
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480 // Cache the start of the static fields |
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481 InstanceMirrorKlass::init_offset_of_static_fields(); |
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482 |
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483 GrowableArray <Klass*>* list = java_lang_Class::fixup_mirror_list(); |
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484 int list_length = list->length(); |
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485 for (int i = 0; i < list_length; i++) { |
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486 Klass* k = list->at(i); |
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487 assert(k->is_klass(), "List should only hold classes"); |
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488 EXCEPTION_MARK; |
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489 KlassHandle kh(THREAD, k); |
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490 java_lang_Class::fixup_mirror(kh, CATCH); |
| 0 | 491 } |
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492 delete java_lang_Class::fixup_mirror_list(); |
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493 java_lang_Class::set_fixup_mirror_list(NULL); |
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494 } |
| 0 | 495 |
| 496 static bool has_run_finalizers_on_exit = false; | |
| 497 | |
| 498 void Universe::run_finalizers_on_exit() { | |
| 499 if (has_run_finalizers_on_exit) return; | |
| 500 has_run_finalizers_on_exit = true; | |
| 501 | |
| 502 // Called on VM exit. This ought to be run in a separate thread. | |
| 503 if (TraceReferenceGC) tty->print_cr("Callback to run finalizers on exit"); | |
| 504 { | |
| 505 PRESERVE_EXCEPTION_MARK; | |
| 1142 | 506 KlassHandle finalizer_klass(THREAD, SystemDictionary::Finalizer_klass()); |
| 0 | 507 JavaValue result(T_VOID); |
| 508 JavaCalls::call_static( | |
| 509 &result, | |
| 510 finalizer_klass, | |
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511 vmSymbols::run_finalizers_on_exit_name(), |
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512 vmSymbols::void_method_signature(), |
| 0 | 513 THREAD |
| 514 ); | |
| 515 // Ignore any pending exceptions | |
| 516 CLEAR_PENDING_EXCEPTION; | |
| 517 } | |
| 518 } | |
| 519 | |
| 520 | |
| 521 // initialize_vtable could cause gc if | |
| 522 // 1) we specified true to initialize_vtable and | |
| 523 // 2) this ran after gc was enabled | |
| 524 // In case those ever change we use handles for oops | |
| 525 void Universe::reinitialize_vtable_of(KlassHandle k_h, TRAPS) { | |
| 526 // init vtable of k and all subclasses | |
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527 Klass* ko = k_h(); |
| 0 | 528 klassVtable* vt = ko->vtable(); |
| 529 if (vt) vt->initialize_vtable(false, CHECK); | |
| 530 if (ko->oop_is_instance()) { | |
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531 InstanceKlass* ik = (InstanceKlass*)ko; |
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532 for (KlassHandle s_h(THREAD, ik->subklass()); s_h() != NULL; s_h = (THREAD, s_h()->next_sibling())) { |
| 0 | 533 reinitialize_vtable_of(s_h, CHECK); |
| 534 } | |
| 535 } | |
| 536 } | |
| 537 | |
| 538 | |
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539 void initialize_itable_for_klass(Klass* k, TRAPS) { |
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540 InstanceKlass::cast(k)->itable()->initialize_itable(false, CHECK); |
| 0 | 541 } |
| 542 | |
| 543 | |
| 544 void Universe::reinitialize_itables(TRAPS) { | |
| 545 SystemDictionary::classes_do(initialize_itable_for_klass, CHECK); | |
| 546 | |
| 547 } | |
| 548 | |
| 549 | |
| 550 bool Universe::on_page_boundary(void* addr) { | |
| 551 return ((uintptr_t) addr) % os::vm_page_size() == 0; | |
| 552 } | |
| 553 | |
| 554 | |
| 555 bool Universe::should_fill_in_stack_trace(Handle throwable) { | |
| 556 // never attempt to fill in the stack trace of preallocated errors that do not have | |
| 557 // backtrace. These errors are kept alive forever and may be "re-used" when all | |
| 558 // preallocated errors with backtrace have been consumed. Also need to avoid | |
| 559 // a potential loop which could happen if an out of memory occurs when attempting | |
| 560 // to allocate the backtrace. | |
| 561 return ((throwable() != Universe::_out_of_memory_error_java_heap) && | |
| 562 (throwable() != Universe::_out_of_memory_error_perm_gen) && | |
| 563 (throwable() != Universe::_out_of_memory_error_array_size) && | |
| 564 (throwable() != Universe::_out_of_memory_error_gc_overhead_limit)); | |
| 565 } | |
| 566 | |
| 567 | |
| 568 oop Universe::gen_out_of_memory_error(oop default_err) { | |
| 569 // generate an out of memory error: | |
| 570 // - if there is a preallocated error with backtrace available then return it wth | |
| 571 // a filled in stack trace. | |
| 572 // - if there are no preallocated errors with backtrace available then return | |
| 573 // an error without backtrace. | |
| 574 int next; | |
| 575 if (_preallocated_out_of_memory_error_avail_count > 0) { | |
| 576 next = (int)Atomic::add(-1, &_preallocated_out_of_memory_error_avail_count); | |
| 577 assert(next < (int)PreallocatedOutOfMemoryErrorCount, "avail count is corrupt"); | |
| 578 } else { | |
| 579 next = -1; | |
| 580 } | |
| 581 if (next < 0) { | |
| 582 // all preallocated errors have been used. | |
| 583 // return default | |
| 584 return default_err; | |
| 585 } else { | |
| 586 // get the error object at the slot and set set it to NULL so that the | |
| 587 // array isn't keeping it alive anymore. | |
| 588 oop exc = preallocated_out_of_memory_errors()->obj_at(next); | |
| 589 assert(exc != NULL, "slot has been used already"); | |
| 590 preallocated_out_of_memory_errors()->obj_at_put(next, NULL); | |
| 591 | |
| 592 // use the message from the default error | |
| 593 oop msg = java_lang_Throwable::message(default_err); | |
| 594 assert(msg != NULL, "no message"); | |
| 595 java_lang_Throwable::set_message(exc, msg); | |
| 596 | |
| 597 // populate the stack trace and return it. | |
| 598 java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(exc); | |
| 599 return exc; | |
| 600 } | |
| 601 } | |
| 602 | |
| 603 static intptr_t non_oop_bits = 0; | |
| 604 | |
| 605 void* Universe::non_oop_word() { | |
| 606 // Neither the high bits nor the low bits of this value is allowed | |
| 607 // to look like (respectively) the high or low bits of a real oop. | |
| 608 // | |
| 609 // High and low are CPU-specific notions, but low always includes | |
| 610 // the low-order bit. Since oops are always aligned at least mod 4, | |
| 611 // setting the low-order bit will ensure that the low half of the | |
| 612 // word will never look like that of a real oop. | |
| 613 // | |
| 614 // Using the OS-supplied non-memory-address word (usually 0 or -1) | |
| 615 // will take care of the high bits, however many there are. | |
| 616 | |
| 617 if (non_oop_bits == 0) { | |
| 618 non_oop_bits = (intptr_t)os::non_memory_address_word() | 1; | |
| 619 } | |
| 620 | |
| 621 return (void*)non_oop_bits; | |
| 622 } | |
| 623 | |
| 624 jint universe_init() { | |
| 625 assert(!Universe::_fully_initialized, "called after initialize_vtables"); | |
| 626 guarantee(1 << LogHeapWordSize == sizeof(HeapWord), | |
| 627 "LogHeapWordSize is incorrect."); | |
| 628 guarantee(sizeof(oop) >= sizeof(HeapWord), "HeapWord larger than oop?"); | |
| 629 guarantee(sizeof(oop) % sizeof(HeapWord) == 0, | |
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630 "oop size is not not a multiple of HeapWord size"); |
| 0 | 631 TraceTime timer("Genesis", TraceStartupTime); |
| 632 GC_locker::lock(); // do not allow gc during bootstrapping | |
| 633 JavaClasses::compute_hard_coded_offsets(); | |
| 634 | |
| 635 jint status = Universe::initialize_heap(); | |
| 636 if (status != JNI_OK) { | |
| 637 return status; | |
| 638 } | |
| 639 | |
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640 // Create memory for metadata. Must be after initializing heap for |
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641 // DumpSharedSpaces. |
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642 ClassLoaderData::init_null_class_loader_data(); |
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643 |
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644 // We have a heap so create the Method* caches before |
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645 // Metaspace::initialize_shared_spaces() tries to populate them. |
| 0 | 646 Universe::_finalizer_register_cache = new LatestMethodOopCache(); |
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647 Universe::_loader_addClass_cache = new LatestMethodOopCache(); |
| 0 | 648 Universe::_reflect_invoke_cache = new ActiveMethodOopsCache(); |
| 649 | |
| 650 if (UseSharedSpaces) { | |
| 651 // Read the data structures supporting the shared spaces (shared | |
| 652 // system dictionary, symbol table, etc.). After that, access to | |
| 653 // the file (other than the mapped regions) is no longer needed, and | |
| 654 // the file is closed. Closing the file does not affect the | |
| 655 // currently mapped regions. | |
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656 MetaspaceShared::initialize_shared_spaces(); |
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657 StringTable::create_table(); |
| 0 | 658 } else { |
| 659 SymbolTable::create_table(); | |
| 660 StringTable::create_table(); | |
| 661 ClassLoader::create_package_info_table(); | |
| 662 } | |
| 663 | |
| 664 return JNI_OK; | |
| 665 } | |
| 666 | |
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667 // Choose the heap base address and oop encoding mode |
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668 // when compressed oops are used: |
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669 // Unscaled - Use 32-bits oops without encoding when |
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670 // NarrowOopHeapBaseMin + heap_size < 4Gb |
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671 // ZeroBased - Use zero based compressed oops with encoding when |
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672 // NarrowOopHeapBaseMin + heap_size < 32Gb |
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673 // HeapBased - Use compressed oops with heap base + encoding. |
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674 |
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675 // 4Gb |
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676 static const uint64_t NarrowOopHeapMax = (uint64_t(max_juint) + 1); |
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677 // 32Gb |
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678 // OopEncodingHeapMax == NarrowOopHeapMax << LogMinObjAlignmentInBytes; |
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679 |
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680 char* Universe::preferred_heap_base(size_t heap_size, NARROW_OOP_MODE mode) { |
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681 size_t base = 0; |
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682 #ifdef _LP64 |
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683 if (UseCompressedOops) { |
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684 assert(mode == UnscaledNarrowOop || |
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685 mode == ZeroBasedNarrowOop || |
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686 mode == HeapBasedNarrowOop, "mode is invalid"); |
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687 const size_t total_size = heap_size + HeapBaseMinAddress; |
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688 // Return specified base for the first request. |
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689 if (!FLAG_IS_DEFAULT(HeapBaseMinAddress) && (mode == UnscaledNarrowOop)) { |
|
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690 base = HeapBaseMinAddress; |
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691 |
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692 // If the total size and the metaspace size are small enough to allow |
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693 // UnscaledNarrowOop then just use UnscaledNarrowOop. |
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694 } else if ((total_size <= OopEncodingHeapMax) && (mode != HeapBasedNarrowOop) && |
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695 (!UseCompressedKlassPointers || |
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696 (((OopEncodingHeapMax - heap_size) + Universe::class_metaspace_size()) <= KlassEncodingMetaspaceMax))) { |
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697 // We don't need to check the metaspace size here because it is always smaller |
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698 // than total_size. |
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699 if ((total_size <= NarrowOopHeapMax) && (mode == UnscaledNarrowOop) && |
|
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700 (Universe::narrow_oop_shift() == 0)) { |
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701 // Use 32-bits oops without encoding and |
|
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702 // place heap's top on the 4Gb boundary |
|
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703 base = (NarrowOopHeapMax - heap_size); |
|
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704 } else { |
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705 // Can't reserve with NarrowOopShift == 0 |
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706 Universe::set_narrow_oop_shift(LogMinObjAlignmentInBytes); |
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707 if (mode == UnscaledNarrowOop || |
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708 mode == ZeroBasedNarrowOop && total_size <= NarrowOopHeapMax) { |
|
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709 // Use zero based compressed oops with encoding and |
|
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710 // place heap's top on the 32Gb boundary in case |
|
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711 // total_size > 4Gb or failed to reserve below 4Gb. |
|
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712 base = (OopEncodingHeapMax - heap_size); |
|
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713 } |
|
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714 } |
|
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715 |
|
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716 // See if ZeroBaseNarrowOop encoding will work for a heap based at |
|
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717 // (KlassEncodingMetaspaceMax - class_metaspace_size()). |
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718 } else if (UseCompressedKlassPointers && (mode != HeapBasedNarrowOop) && |
|
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719 (Universe::class_metaspace_size() + HeapBaseMinAddress <= KlassEncodingMetaspaceMax) && |
|
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720 (KlassEncodingMetaspaceMax + heap_size - Universe::class_metaspace_size() <= OopEncodingHeapMax)) { |
|
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721 base = (KlassEncodingMetaspaceMax - Universe::class_metaspace_size()); |
|
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722 } else { |
|
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723 // UnscaledNarrowOop encoding didn't work, and no base was found for ZeroBasedOops or |
|
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724 // HeapBasedNarrowOop encoding was requested. So, can't reserve below 32Gb. |
|
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725 Universe::set_narrow_oop_shift(LogMinObjAlignmentInBytes); |
|
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726 } |
|
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727 |
|
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728 // Set narrow_oop_base and narrow_oop_use_implicit_null_checks |
|
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729 // used in ReservedHeapSpace() constructors. |
|
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730 // The final values will be set in initialize_heap() below. |
|
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|
731 if ((base != 0) && ((base + heap_size) <= OopEncodingHeapMax) && |
|
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|
732 (!UseCompressedKlassPointers || (base + Universe::class_metaspace_size()) <= KlassEncodingMetaspaceMax)) { |
|
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733 // Use zero based compressed oops |
|
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|
734 Universe::set_narrow_oop_base(NULL); |
|
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735 // Don't need guard page for implicit checks in indexed |
|
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736 // addressing mode with zero based Compressed Oops. |
|
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|
737 Universe::set_narrow_oop_use_implicit_null_checks(true); |
|
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738 } else { |
|
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|
739 // Set to a non-NULL value so the ReservedSpace ctor computes |
|
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|
740 // the correct no-access prefix. |
|
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|
741 // The final value will be set in initialize_heap() below. |
|
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|
742 Universe::set_narrow_oop_base((address)NarrowOopHeapMax); |
|
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|
743 #ifdef _WIN64 |
|
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|
744 if (UseLargePages) { |
|
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|
745 // Cannot allocate guard pages for implicit checks in indexed |
|
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|
746 // addressing mode when large pages are specified on windows. |
|
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|
747 Universe::set_narrow_oop_use_implicit_null_checks(false); |
|
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|
748 } |
|
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|
749 #endif // _WIN64 |
|
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|
750 } |
|
642
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|
751 } |
|
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|
752 #endif |
|
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|
753 return (char*)base; // also return NULL (don't care) for 32-bit VM |
|
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|
754 } |
|
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|
755 |
| 0 | 756 jint Universe::initialize_heap() { |
| 757 | |
| 758 if (UseParallelGC) { | |
|
8001
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|
759 #if INCLUDE_ALL_GCS |
| 0 | 760 Universe::_collectedHeap = new ParallelScavengeHeap(); |
|
8001
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|
761 #else // INCLUDE_ALL_GCS |
|
6854
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|
762 fatal("UseParallelGC not supported in this VM."); |
|
8001
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|
763 #endif // INCLUDE_ALL_GCS |
| 0 | 764 |
|
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|
765 } else if (UseG1GC) { |
|
8001
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|
766 #if INCLUDE_ALL_GCS |
| 4013 | 767 G1CollectorPolicy* g1p = new G1CollectorPolicy(); |
|
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|
768 G1CollectedHeap* g1h = new G1CollectedHeap(g1p); |
|
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|
769 Universe::_collectedHeap = g1h; |
|
8001
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|
770 #else // INCLUDE_ALL_GCS |
|
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|
771 fatal("UseG1GC not supported in java kernel vm."); |
|
8001
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|
772 #endif // INCLUDE_ALL_GCS |
|
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|
773 |
| 0 | 774 } else { |
| 775 GenCollectorPolicy *gc_policy; | |
| 776 | |
| 777 if (UseSerialGC) { | |
| 778 gc_policy = new MarkSweepPolicy(); | |
| 779 } else if (UseConcMarkSweepGC) { | |
|
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|
780 #if INCLUDE_ALL_GCS |
| 0 | 781 if (UseAdaptiveSizePolicy) { |
| 782 gc_policy = new ASConcurrentMarkSweepPolicy(); | |
| 783 } else { | |
| 784 gc_policy = new ConcurrentMarkSweepPolicy(); | |
| 785 } | |
|
8001
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|
786 #else // INCLUDE_ALL_GCS |
|
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|
787 fatal("UseConcMarkSweepGC not supported in this VM."); |
|
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|
788 #endif // INCLUDE_ALL_GCS |
| 0 | 789 } else { // default old generation |
| 790 gc_policy = new MarkSweepPolicy(); | |
| 791 } | |
| 792 | |
| 793 Universe::_collectedHeap = new GenCollectedHeap(gc_policy); | |
| 794 } | |
| 795 | |
| 796 jint status = Universe::heap()->initialize(); | |
| 797 if (status != JNI_OK) { | |
| 798 return status; | |
| 799 } | |
|
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800 |
|
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|
801 #ifdef _LP64 |
|
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802 if (UseCompressedOops) { |
|
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|
803 // Subtract a page because something can get allocated at heap base. |
|
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804 // This also makes implicit null checking work, because the |
|
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|
805 // memory+1 page below heap_base needs to cause a signal. |
|
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806 // See needs_explicit_null_check. |
|
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|
807 // Only set the heap base for compressed oops because it indicates |
|
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|
808 // compressed oops for pstack code. |
| 2080 | 809 bool verbose = PrintCompressedOopsMode || (PrintMiscellaneous && Verbose); |
| 810 if (verbose) { | |
|
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|
811 tty->cr(); |
| 1963 | 812 tty->print("heap address: " PTR_FORMAT ", size: " SIZE_FORMAT " MB", |
| 813 Universe::heap()->base(), Universe::heap()->reserved_region().byte_size()/M); | |
|
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|
814 } |
|
7982
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|
815 if (((uint64_t)Universe::heap()->reserved_region().end() > OopEncodingHeapMax) || |
|
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|
816 (UseCompressedKlassPointers && |
|
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|
817 ((uint64_t)Universe::heap()->base() + Universe::class_metaspace_size() > KlassEncodingMetaspaceMax))) { |
|
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|
818 // Can't reserve heap below 32Gb. |
|
6848
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|
819 // keep the Universe::narrow_oop_base() set in Universe::reserve_heap() |
|
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|
820 Universe::set_narrow_oop_shift(LogMinObjAlignmentInBytes); |
| 2080 | 821 if (verbose) { |
|
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822 tty->print(", Compressed Oops with base: "PTR_FORMAT, Universe::narrow_oop_base()); |
|
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823 } |
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824 } else { |
|
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|
825 Universe::set_narrow_oop_base(0); |
| 2080 | 826 if (verbose) { |
|
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827 tty->print(", zero based Compressed Oops"); |
|
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828 } |
|
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829 #ifdef _WIN64 |
|
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830 if (!Universe::narrow_oop_use_implicit_null_checks()) { |
|
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831 // Don't need guard page for implicit checks in indexed addressing |
|
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832 // mode with zero based Compressed Oops. |
|
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833 Universe::set_narrow_oop_use_implicit_null_checks(true); |
|
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834 } |
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835 #endif // _WIN64 |
|
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836 if((uint64_t)Universe::heap()->reserved_region().end() > NarrowOopHeapMax) { |
|
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837 // Can't reserve heap below 4Gb. |
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838 Universe::set_narrow_oop_shift(LogMinObjAlignmentInBytes); |
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839 } else { |
|
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840 Universe::set_narrow_oop_shift(0); |
| 2080 | 841 if (verbose) { |
|
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842 tty->print(", 32-bits Oops"); |
|
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843 } |
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844 } |
|
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845 } |
| 2080 | 846 if (verbose) { |
|
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847 tty->cr(); |
|
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848 tty->cr(); |
|
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849 } |
|
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850 if (UseCompressedKlassPointers) { |
|
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851 Universe::set_narrow_klass_base(Universe::narrow_oop_base()); |
|
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852 Universe::set_narrow_klass_shift(MIN2(Universe::narrow_oop_shift(), LogKlassAlignmentInBytes)); |
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853 } |
|
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854 Universe::set_narrow_ptrs_base(Universe::narrow_oop_base()); |
|
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855 } |
|
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856 // Universe::narrow_oop_base() is one page below the metaspace |
|
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857 // base. The actual metaspace base depends on alignment constraints |
|
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858 // so we don't know its exact location here. |
|
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859 assert((intptr_t)Universe::narrow_oop_base() <= (intptr_t)(Universe::heap()->base() - os::vm_page_size() - ClassMetaspaceSize) || |
|
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860 Universe::narrow_oop_base() == NULL, "invalid value"); |
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861 assert(Universe::narrow_oop_shift() == LogMinObjAlignmentInBytes || |
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862 Universe::narrow_oop_shift() == 0, "invalid value"); |
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863 #endif |
| 0 | 864 |
| 865 // We will never reach the CATCH below since Exceptions::_throw will cause | |
| 866 // the VM to exit if an exception is thrown during initialization | |
| 867 | |
| 868 if (UseTLAB) { | |
| 869 assert(Universe::heap()->supports_tlab_allocation(), | |
| 870 "Should support thread-local allocation buffers"); | |
| 871 ThreadLocalAllocBuffer::startup_initialization(); | |
| 872 } | |
| 873 return JNI_OK; | |
| 874 } | |
| 875 | |
|
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876 |
|
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877 // Reserve the Java heap, which is now the same for all GCs. |
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878 ReservedSpace Universe::reserve_heap(size_t heap_size, size_t alignment) { |
|
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879 // Add in the class metaspace area so the classes in the headers can |
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880 // be compressed the same as instances. |
|
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881 // Need to round class space size up because it's below the heap and |
|
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882 // the actual alignment depends on its size. |
|
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883 Universe::set_class_metaspace_size(align_size_up(ClassMetaspaceSize, alignment)); |
|
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884 size_t total_reserved = align_size_up(heap_size + Universe::class_metaspace_size(), alignment); |
|
8741
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885 assert(!UseCompressedOops || (total_reserved <= (OopEncodingHeapMax - os::vm_page_size())), |
|
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886 "heap size is too big for compressed oops"); |
|
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887 char* addr = Universe::preferred_heap_base(total_reserved, Universe::UnscaledNarrowOop); |
|
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888 |
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889 ReservedHeapSpace total_rs(total_reserved, alignment, UseLargePages, addr); |
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890 |
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891 if (UseCompressedOops) { |
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892 if (addr != NULL && !total_rs.is_reserved()) { |
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893 // Failed to reserve at specified address - the requested memory |
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894 // region is taken already, for example, by 'java' launcher. |
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895 // Try again to reserver heap higher. |
|
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896 addr = Universe::preferred_heap_base(total_reserved, Universe::ZeroBasedNarrowOop); |
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897 |
|
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898 ReservedHeapSpace total_rs0(total_reserved, alignment, |
|
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899 UseLargePages, addr); |
|
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900 |
|
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901 if (addr != NULL && !total_rs0.is_reserved()) { |
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902 // Failed to reserve at specified address again - give up. |
|
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903 addr = Universe::preferred_heap_base(total_reserved, Universe::HeapBasedNarrowOop); |
|
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904 assert(addr == NULL, ""); |
|
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905 |
|
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906 ReservedHeapSpace total_rs1(total_reserved, alignment, |
|
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907 UseLargePages, addr); |
|
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908 total_rs = total_rs1; |
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909 } else { |
|
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910 total_rs = total_rs0; |
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911 } |
|
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912 } |
|
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913 } |
|
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914 |
|
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915 if (!total_rs.is_reserved()) { |
|
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|
916 vm_exit_during_initialization(err_msg("Could not reserve enough space for " SIZE_FORMAT "KB object heap", total_reserved/K)); |
|
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917 return total_rs; |
|
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918 } |
|
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919 |
|
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920 // Split the reserved space into main Java heap and a space for |
|
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921 // classes so that they can be compressed using the same algorithm |
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922 // as compressed oops. If compress oops and compress klass ptrs are |
|
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923 // used we need the meta space first: if the alignment used for |
|
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924 // compressed oops is greater than the one used for compressed klass |
|
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925 // ptrs, a metadata space on top of the heap could become |
|
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926 // unreachable. |
|
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927 ReservedSpace class_rs = total_rs.first_part(Universe::class_metaspace_size()); |
|
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928 ReservedSpace heap_rs = total_rs.last_part(Universe::class_metaspace_size(), alignment); |
|
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929 Metaspace::initialize_class_space(class_rs); |
|
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930 |
|
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931 if (UseCompressedOops) { |
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932 // Universe::initialize_heap() will reset this to NULL if unscaled |
|
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933 // or zero-based narrow oops are actually used. |
|
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934 address base = (address)(total_rs.base() - os::vm_page_size()); |
|
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935 Universe::set_narrow_oop_base(base); |
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936 } |
|
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937 return heap_rs; |
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938 } |
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939 |
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940 |
| 0 | 941 // It's the caller's repsonsibility to ensure glitch-freedom |
| 942 // (if required). | |
| 943 void Universe::update_heap_info_at_gc() { | |
| 944 _heap_capacity_at_last_gc = heap()->capacity(); | |
| 945 _heap_used_at_last_gc = heap()->used(); | |
| 946 } | |
| 947 | |
| 948 | |
| 949 | |
| 950 void universe2_init() { | |
| 951 EXCEPTION_MARK; | |
| 952 Universe::genesis(CATCH); | |
| 953 } | |
| 954 | |
| 955 | |
| 956 // This function is defined in JVM.cpp | |
| 957 extern void initialize_converter_functions(); | |
| 958 | |
| 959 bool universe_post_init() { | |
|
1959
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|
960 assert(!is_init_completed(), "Error: initialization not yet completed!"); |
| 0 | 961 Universe::_fully_initialized = true; |
| 962 EXCEPTION_MARK; | |
| 963 { ResourceMark rm; | |
| 964 Interpreter::initialize(); // needed for interpreter entry points | |
| 965 if (!UseSharedSpaces) { | |
|
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966 HandleMark hm(THREAD); |
| 1142 | 967 KlassHandle ok_h(THREAD, SystemDictionary::Object_klass()); |
| 0 | 968 Universe::reinitialize_vtable_of(ok_h, CHECK_false); |
| 969 Universe::reinitialize_itables(CHECK_false); | |
| 970 } | |
| 971 } | |
| 972 | |
|
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973 HandleMark hm(THREAD); |
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974 Klass* k; |
| 0 | 975 instanceKlassHandle k_h; |
| 976 // Setup preallocated empty java.lang.Class array | |
| 1142 | 977 Universe::_the_empty_class_klass_array = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_false); |
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978 |
| 0 | 979 // Setup preallocated OutOfMemoryError errors |
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980 k = SystemDictionary::resolve_or_fail(vmSymbols::java_lang_OutOfMemoryError(), true, CHECK_false); |
| 0 | 981 k_h = instanceKlassHandle(THREAD, k); |
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982 Universe::_out_of_memory_error_java_heap = k_h->allocate_instance(CHECK_false); |
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983 Universe::_out_of_memory_error_perm_gen = k_h->allocate_instance(CHECK_false); |
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984 Universe::_out_of_memory_error_array_size = k_h->allocate_instance(CHECK_false); |
| 0 | 985 Universe::_out_of_memory_error_gc_overhead_limit = |
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986 k_h->allocate_instance(CHECK_false); |
| 0 | 987 |
| 988 // Setup preallocated NullPointerException | |
| 989 // (this is currently used for a cheap & dirty solution in compiler exception handling) | |
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990 k = SystemDictionary::resolve_or_fail(vmSymbols::java_lang_NullPointerException(), true, CHECK_false); |
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991 Universe::_null_ptr_exception_instance = InstanceKlass::cast(k)->allocate_instance(CHECK_false); |
| 0 | 992 // Setup preallocated ArithmeticException |
| 993 // (this is currently used for a cheap & dirty solution in compiler exception handling) | |
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994 k = SystemDictionary::resolve_or_fail(vmSymbols::java_lang_ArithmeticException(), true, CHECK_false); |
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995 Universe::_arithmetic_exception_instance = InstanceKlass::cast(k)->allocate_instance(CHECK_false); |
| 0 | 996 // Virtual Machine Error for when we get into a situation we can't resolve |
| 997 k = SystemDictionary::resolve_or_fail( | |
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998 vmSymbols::java_lang_VirtualMachineError(), true, CHECK_false); |
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999 bool linked = InstanceKlass::cast(k)->link_class_or_fail(CHECK_false); |
| 0 | 1000 if (!linked) { |
| 1001 tty->print_cr("Unable to link/verify VirtualMachineError class"); | |
| 1002 return false; // initialization failed | |
| 1003 } | |
| 1004 Universe::_virtual_machine_error_instance = | |
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1005 InstanceKlass::cast(k)->allocate_instance(CHECK_false); |
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1006 |
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1007 Universe::_vm_exception = InstanceKlass::cast(k)->allocate_instance(CHECK_false); |
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1008 |
| 0 | 1009 if (!DumpSharedSpaces) { |
| 1010 // These are the only Java fields that are currently set during shared space dumping. | |
| 1011 // We prefer to not handle this generally, so we always reinitialize these detail messages. | |
| 1012 Handle msg = java_lang_String::create_from_str("Java heap space", CHECK_false); | |
| 1013 java_lang_Throwable::set_message(Universe::_out_of_memory_error_java_heap, msg()); | |
| 1014 | |
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1015 msg = java_lang_String::create_from_str("Metadata space", CHECK_false); |
| 0 | 1016 java_lang_Throwable::set_message(Universe::_out_of_memory_error_perm_gen, msg()); |
| 1017 | |
| 1018 msg = java_lang_String::create_from_str("Requested array size exceeds VM limit", CHECK_false); | |
| 1019 java_lang_Throwable::set_message(Universe::_out_of_memory_error_array_size, msg()); | |
| 1020 | |
| 1021 msg = java_lang_String::create_from_str("GC overhead limit exceeded", CHECK_false); | |
| 1022 java_lang_Throwable::set_message(Universe::_out_of_memory_error_gc_overhead_limit, msg()); | |
| 1023 | |
| 1024 msg = java_lang_String::create_from_str("/ by zero", CHECK_false); | |
| 1025 java_lang_Throwable::set_message(Universe::_arithmetic_exception_instance, msg()); | |
| 1026 | |
| 1027 // Setup the array of errors that have preallocated backtrace | |
| 1028 k = Universe::_out_of_memory_error_java_heap->klass(); | |
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1029 assert(k->name() == vmSymbols::java_lang_OutOfMemoryError(), "should be out of memory error"); |
| 0 | 1030 k_h = instanceKlassHandle(THREAD, k); |
| 1031 | |
| 1032 int len = (StackTraceInThrowable) ? (int)PreallocatedOutOfMemoryErrorCount : 0; | |
| 1033 Universe::_preallocated_out_of_memory_error_array = oopFactory::new_objArray(k_h(), len, CHECK_false); | |
| 1034 for (int i=0; i<len; i++) { | |
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1035 oop err = k_h->allocate_instance(CHECK_false); |
| 0 | 1036 Handle err_h = Handle(THREAD, err); |
| 1037 java_lang_Throwable::allocate_backtrace(err_h, CHECK_false); | |
| 1038 Universe::preallocated_out_of_memory_errors()->obj_at_put(i, err_h()); | |
| 1039 } | |
| 1040 Universe::_preallocated_out_of_memory_error_avail_count = (jint)len; | |
| 1041 } | |
| 1042 | |
| 1043 | |
| 1044 // Setup static method for registering finalizers | |
| 1045 // The finalizer klass must be linked before looking up the method, in | |
| 1046 // case it needs to get rewritten. | |
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1047 InstanceKlass::cast(SystemDictionary::Finalizer_klass())->link_class(CHECK_false); |
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1048 Method* m = InstanceKlass::cast(SystemDictionary::Finalizer_klass())->find_method( |
| 0 | 1049 vmSymbols::register_method_name(), |
| 1050 vmSymbols::register_method_signature()); | |
| 1051 if (m == NULL || !m->is_static()) { | |
| 1052 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodException(), | |
| 1053 "java.lang.ref.Finalizer.register", false); | |
| 1054 } | |
| 1055 Universe::_finalizer_register_cache->init( | |
| 1142 | 1056 SystemDictionary::Finalizer_klass(), m, CHECK_false); |
| 0 | 1057 |
| 1058 // Resolve on first use and initialize class. | |
| 1059 // Note: No race-condition here, since a resolve will always return the same result | |
| 1060 | |
| 1061 // Setup method for security checks | |
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1062 k = SystemDictionary::resolve_or_fail(vmSymbols::java_lang_reflect_Method(), true, CHECK_false); |
| 0 | 1063 k_h = instanceKlassHandle(THREAD, k); |
| 1064 k_h->link_class(CHECK_false); | |
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1065 m = k_h->find_method(vmSymbols::invoke_name(), vmSymbols::object_object_array_object_signature()); |
| 0 | 1066 if (m == NULL || m->is_static()) { |
| 1067 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodException(), | |
| 1068 "java.lang.reflect.Method.invoke", false); | |
| 1069 } | |
| 1070 Universe::_reflect_invoke_cache->init(k_h(), m, CHECK_false); | |
| 1071 | |
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1072 // Setup method for registering loaded classes in class loader vector |
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1073 InstanceKlass::cast(SystemDictionary::ClassLoader_klass())->link_class(CHECK_false); |
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1074 m = InstanceKlass::cast(SystemDictionary::ClassLoader_klass())->find_method(vmSymbols::addClass_name(), vmSymbols::class_void_signature()); |
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1075 if (m == NULL || m->is_static()) { |
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1076 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodException(), |
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1077 "java.lang.ClassLoader.addClass", false); |
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1078 } |
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1079 Universe::_loader_addClass_cache->init( |
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1080 SystemDictionary::ClassLoader_klass(), m, CHECK_false); |
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1081 |
| 0 | 1082 // The folowing is initializing converter functions for serialization in |
| 1083 // JVM.cpp. If we clean up the StrictMath code above we may want to find | |
| 1084 // a better solution for this as well. | |
| 1085 initialize_converter_functions(); | |
| 1086 | |
| 1087 // This needs to be done before the first scavenge/gc, since | |
| 1088 // it's an input to soft ref clearing policy. | |
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1089 { |
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1090 MutexLocker x(Heap_lock); |
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1091 Universe::update_heap_info_at_gc(); |
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1092 } |
| 0 | 1093 |
| 1094 // ("weak") refs processing infrastructure initialization | |
| 1095 Universe::heap()->post_initialize(); | |
| 1096 | |
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1097 // Initialize performance counters for metaspaces |
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1098 MetaspaceCounters::initialize_performance_counters(); |
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1099 |
| 0 | 1100 GC_locker::unlock(); // allow gc after bootstrapping |
| 1101 | |
| 1102 MemoryService::set_universe_heap(Universe::_collectedHeap); | |
| 1103 return true; | |
| 1104 } | |
| 1105 | |
| 1106 | |
| 1107 void Universe::compute_base_vtable_size() { | |
| 1108 _base_vtable_size = ClassLoader::compute_Object_vtable(); | |
| 1109 } | |
| 1110 | |
| 1111 | |
| 1112 // %%% The Universe::flush_foo methods belong in CodeCache. | |
| 1113 | |
| 1114 // Flushes compiled methods dependent on dependee. | |
| 1115 void Universe::flush_dependents_on(instanceKlassHandle dependee) { | |
| 1116 assert_lock_strong(Compile_lock); | |
| 1117 | |
| 1118 if (CodeCache::number_of_nmethods_with_dependencies() == 0) return; | |
| 1119 | |
| 1120 // CodeCache can only be updated by a thread_in_VM and they will all be | |
| 1121 // stopped dring the safepoint so CodeCache will be safe to update without | |
| 1122 // holding the CodeCache_lock. | |
| 1123 | |
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1124 KlassDepChange changes(dependee); |
| 0 | 1125 |
| 1126 // Compute the dependent nmethods | |
| 1127 if (CodeCache::mark_for_deoptimization(changes) > 0) { | |
| 1128 // At least one nmethod has been marked for deoptimization | |
| 1129 VM_Deoptimize op; | |
| 1130 VMThread::execute(&op); | |
| 1131 } | |
| 1132 } | |
| 1133 | |
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1134 // Flushes compiled methods dependent on a particular CallSite |
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1135 // instance when its target is different than the given MethodHandle. |
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1136 void Universe::flush_dependents_on(Handle call_site, Handle method_handle) { |
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1137 assert_lock_strong(Compile_lock); |
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1138 |
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1139 if (CodeCache::number_of_nmethods_with_dependencies() == 0) return; |
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1140 |
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1141 // CodeCache can only be updated by a thread_in_VM and they will all be |
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1142 // stopped dring the safepoint so CodeCache will be safe to update without |
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1143 // holding the CodeCache_lock. |
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1144 |
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1145 CallSiteDepChange changes(call_site(), method_handle()); |
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1146 |
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1147 // Compute the dependent nmethods that have a reference to a |
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1148 // CallSite object. We use InstanceKlass::mark_dependent_nmethod |
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1149 // directly instead of CodeCache::mark_for_deoptimization because we |
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1150 // want dependents on the call site class only not all classes in |
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1151 // the ContextStream. |
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1152 int marked = 0; |
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1153 { |
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1154 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); |
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1155 InstanceKlass* call_site_klass = InstanceKlass::cast(call_site->klass()); |
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1156 marked = call_site_klass->mark_dependent_nmethods(changes); |
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1157 } |
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1158 if (marked > 0) { |
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1159 // At least one nmethod has been marked for deoptimization |
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1160 VM_Deoptimize op; |
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1161 VMThread::execute(&op); |
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1162 } |
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1163 } |
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1164 |
| 0 | 1165 #ifdef HOTSWAP |
| 1166 // Flushes compiled methods dependent on dependee in the evolutionary sense | |
| 1167 void Universe::flush_evol_dependents_on(instanceKlassHandle ev_k_h) { | |
| 1168 // --- Compile_lock is not held. However we are at a safepoint. | |
| 1169 assert_locked_or_safepoint(Compile_lock); | |
| 1170 if (CodeCache::number_of_nmethods_with_dependencies() == 0) return; | |
| 1171 | |
| 1172 // CodeCache can only be updated by a thread_in_VM and they will all be | |
| 1173 // stopped dring the safepoint so CodeCache will be safe to update without | |
| 1174 // holding the CodeCache_lock. | |
| 1175 | |
| 1176 // Compute the dependent nmethods | |
| 1177 if (CodeCache::mark_for_evol_deoptimization(ev_k_h) > 0) { | |
| 1178 // At least one nmethod has been marked for deoptimization | |
| 1179 | |
| 1180 // All this already happens inside a VM_Operation, so we'll do all the work here. | |
| 1181 // Stuff copied from VM_Deoptimize and modified slightly. | |
| 1182 | |
| 1183 // We do not want any GCs to happen while we are in the middle of this VM operation | |
| 1184 ResourceMark rm; | |
| 1185 DeoptimizationMarker dm; | |
| 1186 | |
| 1187 // Deoptimize all activations depending on marked nmethods | |
| 1188 Deoptimization::deoptimize_dependents(); | |
| 1189 | |
| 1190 // Make the dependent methods not entrant (in VM_Deoptimize they are made zombies) | |
| 1191 CodeCache::make_marked_nmethods_not_entrant(); | |
| 1192 } | |
| 1193 } | |
| 1194 #endif // HOTSWAP | |
| 1195 | |
| 1196 | |
| 1197 // Flushes compiled methods dependent on dependee | |
| 1198 void Universe::flush_dependents_on_method(methodHandle m_h) { | |
| 1199 // --- Compile_lock is not held. However we are at a safepoint. | |
| 1200 assert_locked_or_safepoint(Compile_lock); | |
| 1201 | |
| 1202 // CodeCache can only be updated by a thread_in_VM and they will all be | |
| 1203 // stopped dring the safepoint so CodeCache will be safe to update without | |
| 1204 // holding the CodeCache_lock. | |
| 1205 | |
| 1206 // Compute the dependent nmethods | |
| 1207 if (CodeCache::mark_for_deoptimization(m_h()) > 0) { | |
| 1208 // At least one nmethod has been marked for deoptimization | |
| 1209 | |
| 1210 // All this already happens inside a VM_Operation, so we'll do all the work here. | |
| 1211 // Stuff copied from VM_Deoptimize and modified slightly. | |
| 1212 | |
| 1213 // We do not want any GCs to happen while we are in the middle of this VM operation | |
| 1214 ResourceMark rm; | |
| 1215 DeoptimizationMarker dm; | |
| 1216 | |
| 1217 // Deoptimize all activations depending on marked nmethods | |
| 1218 Deoptimization::deoptimize_dependents(); | |
| 1219 | |
| 1220 // Make the dependent methods not entrant (in VM_Deoptimize they are made zombies) | |
| 1221 CodeCache::make_marked_nmethods_not_entrant(); | |
| 1222 } | |
| 1223 } | |
| 1224 | |
|
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1225 void Universe::print() { |
|
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1226 print_on(gclog_or_tty); |
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1227 } |
| 0 | 1228 |
|
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1229 void Universe::print_on(outputStream* st, bool extended) { |
| 0 | 1230 st->print_cr("Heap"); |
|
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1231 if (!extended) { |
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1232 heap()->print_on(st); |
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1233 } else { |
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1234 heap()->print_extended_on(st); |
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1235 } |
| 0 | 1236 } |
| 1237 | |
| 1238 void Universe::print_heap_at_SIGBREAK() { | |
| 1239 if (PrintHeapAtSIGBREAK) { | |
| 1240 MutexLocker hl(Heap_lock); | |
| 1241 print_on(tty); | |
| 1242 tty->cr(); | |
| 1243 tty->flush(); | |
| 1244 } | |
| 1245 } | |
| 1246 | |
| 4944 | 1247 void Universe::print_heap_before_gc(outputStream* st, bool ignore_extended) { |
| 0 | 1248 st->print_cr("{Heap before GC invocations=%u (full %u):", |
| 1249 heap()->total_collections(), | |
| 1250 heap()->total_full_collections()); | |
| 4944 | 1251 if (!PrintHeapAtGCExtended || ignore_extended) { |
|
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1252 heap()->print_on(st); |
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1253 } else { |
|
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1254 heap()->print_extended_on(st); |
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1255 } |
| 0 | 1256 } |
| 1257 | |
| 4944 | 1258 void Universe::print_heap_after_gc(outputStream* st, bool ignore_extended) { |
| 0 | 1259 st->print_cr("Heap after GC invocations=%u (full %u):", |
| 1260 heap()->total_collections(), | |
| 1261 heap()->total_full_collections()); | |
| 4944 | 1262 if (!PrintHeapAtGCExtended || ignore_extended) { |
|
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1263 heap()->print_on(st); |
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1264 } else { |
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1265 heap()->print_extended_on(st); |
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1266 } |
| 0 | 1267 st->print_cr("}"); |
| 1268 } | |
| 1269 | |
|
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1270 void Universe::verify(VerifyOption option, const char* prefix, bool silent) { |
| 0 | 1271 // The use of _verify_in_progress is a temporary work around for |
| 1272 // 6320749. Don't bother with a creating a class to set and clear | |
| 1273 // it since it is only used in this method and the control flow is | |
| 1274 // straight forward. | |
| 1275 _verify_in_progress = true; | |
| 1276 | |
| 1277 COMPILER2_PRESENT( | |
| 1278 assert(!DerivedPointerTable::is_active(), | |
| 1279 "DPT should not be active during verification " | |
| 1280 "(of thread stacks below)"); | |
| 1281 ) | |
| 1282 | |
| 1283 ResourceMark rm; | |
| 1284 HandleMark hm; // Handles created during verification can be zapped | |
| 1285 _verify_count++; | |
| 1286 | |
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1287 if (!silent) gclog_or_tty->print(prefix); |
| 0 | 1288 if (!silent) gclog_or_tty->print("[Verifying "); |
| 1289 if (!silent) gclog_or_tty->print("threads "); | |
| 1290 Threads::verify(); | |
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1291 if (!silent) gclog_or_tty->print("heap "); |
| 6008 | 1292 heap()->verify(silent, option); |
| 0 | 1293 if (!silent) gclog_or_tty->print("syms "); |
| 1294 SymbolTable::verify(); | |
| 1295 if (!silent) gclog_or_tty->print("strs "); | |
| 1296 StringTable::verify(); | |
| 1297 { | |
| 1298 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); | |
| 1299 if (!silent) gclog_or_tty->print("zone "); | |
| 1300 CodeCache::verify(); | |
| 1301 } | |
| 1302 if (!silent) gclog_or_tty->print("dict "); | |
| 1303 SystemDictionary::verify(); | |
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1304 #ifndef PRODUCT |
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1305 if (!silent) gclog_or_tty->print("cldg "); |
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1306 ClassLoaderDataGraph::verify(); |
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1307 #endif |
|
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1308 if (!silent) gclog_or_tty->print("metaspace chunks "); |
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1309 MetaspaceAux::verify_free_chunks(); |
| 0 | 1310 if (!silent) gclog_or_tty->print("hand "); |
| 1311 JNIHandles::verify(); | |
| 1312 if (!silent) gclog_or_tty->print("C-heap "); | |
| 1313 os::check_heap(); | |
|
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1314 if (!silent) gclog_or_tty->print("code cache "); |
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1315 CodeCache::verify_oops(); |
| 0 | 1316 if (!silent) gclog_or_tty->print_cr("]"); |
| 1317 | |
| 1318 _verify_in_progress = false; | |
| 1319 } | |
| 1320 | |
| 1321 // Oop verification (see MacroAssembler::verify_oop) | |
| 1322 | |
| 1323 static uintptr_t _verify_oop_data[2] = {0, (uintptr_t)-1}; | |
| 1324 static uintptr_t _verify_klass_data[2] = {0, (uintptr_t)-1}; | |
| 1325 | |
| 1326 | |
|
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1327 #ifndef PRODUCT |
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1328 |
| 0 | 1329 static void calculate_verify_data(uintptr_t verify_data[2], |
| 1330 HeapWord* low_boundary, | |
| 1331 HeapWord* high_boundary) { | |
| 1332 assert(low_boundary < high_boundary, "bad interval"); | |
| 1333 | |
| 1334 // decide which low-order bits we require to be clear: | |
| 1335 size_t alignSize = MinObjAlignmentInBytes; | |
|
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1336 size_t min_object_size = CollectedHeap::min_fill_size(); |
| 0 | 1337 |
| 1338 // make an inclusive limit: | |
| 1339 uintptr_t max = (uintptr_t)high_boundary - min_object_size*wordSize; | |
| 1340 uintptr_t min = (uintptr_t)low_boundary; | |
| 1341 assert(min < max, "bad interval"); | |
| 1342 uintptr_t diff = max ^ min; | |
| 1343 | |
| 1344 // throw away enough low-order bits to make the diff vanish | |
| 1345 uintptr_t mask = (uintptr_t)(-1); | |
| 1346 while ((mask & diff) != 0) | |
| 1347 mask <<= 1; | |
| 1348 uintptr_t bits = (min & mask); | |
| 1349 assert(bits == (max & mask), "correct mask"); | |
| 1350 // check an intermediate value between min and max, just to make sure: | |
| 1351 assert(bits == ((min + (max-min)/2) & mask), "correct mask"); | |
| 1352 | |
| 1353 // require address alignment, too: | |
| 1354 mask |= (alignSize - 1); | |
| 1355 | |
| 1356 if (!(verify_data[0] == 0 && verify_data[1] == (uintptr_t)-1)) { | |
| 1357 assert(verify_data[0] == mask && verify_data[1] == bits, "mask stability"); | |
| 1358 } | |
| 1359 verify_data[0] = mask; | |
| 1360 verify_data[1] = bits; | |
| 1361 } | |
| 1362 | |
| 1363 // Oop verification (see MacroAssembler::verify_oop) | |
| 1364 | |
| 1365 uintptr_t Universe::verify_oop_mask() { | |
| 1366 MemRegion m = heap()->reserved_region(); | |
| 1367 calculate_verify_data(_verify_oop_data, | |
| 1368 m.start(), | |
| 1369 m.end()); | |
| 1370 return _verify_oop_data[0]; | |
| 1371 } | |
| 1372 | |
| 1373 | |
| 1374 | |
| 1375 uintptr_t Universe::verify_oop_bits() { | |
| 1376 verify_oop_mask(); | |
| 1377 return _verify_oop_data[1]; | |
| 1378 } | |
| 1379 | |
| 1380 uintptr_t Universe::verify_mark_mask() { | |
| 1381 return markOopDesc::lock_mask_in_place; | |
| 1382 } | |
| 1383 | |
| 1384 uintptr_t Universe::verify_mark_bits() { | |
| 1385 intptr_t mask = verify_mark_mask(); | |
| 1386 intptr_t bits = (intptr_t)markOopDesc::prototype(); | |
| 1387 assert((bits & ~mask) == 0, "no stray header bits"); | |
| 1388 return bits; | |
| 1389 } | |
| 1390 #endif // PRODUCT | |
| 1391 | |
| 1392 | |
| 1393 void Universe::compute_verify_oop_data() { | |
| 1394 verify_oop_mask(); | |
| 1395 verify_oop_bits(); | |
| 1396 verify_mark_mask(); | |
| 1397 verify_mark_bits(); | |
| 1398 } | |
| 1399 | |
| 1400 | |
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1401 void CommonMethodOopCache::init(Klass* k, Method* m, TRAPS) { |
| 0 | 1402 if (!UseSharedSpaces) { |
| 1403 _klass = k; | |
| 1404 } | |
| 1405 #ifndef PRODUCT | |
| 1406 else { | |
| 1407 // sharing initilization should have already set up _klass | |
| 1408 assert(_klass != NULL, "just checking"); | |
| 1409 } | |
| 1410 #endif | |
| 1411 | |
| 1412 _method_idnum = m->method_idnum(); | |
| 1413 assert(_method_idnum >= 0, "sanity check"); | |
| 1414 } | |
| 1415 | |
| 1416 | |
| 1417 ActiveMethodOopsCache::~ActiveMethodOopsCache() { | |
| 1418 if (_prev_methods != NULL) { | |
| 1419 delete _prev_methods; | |
| 1420 _prev_methods = NULL; | |
| 1421 } | |
| 1422 } | |
| 1423 | |
| 1424 | |
|
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1425 void ActiveMethodOopsCache::add_previous_version(Method* method) { |
| 0 | 1426 assert(Thread::current()->is_VM_thread(), |
| 1427 "only VMThread can add previous versions"); | |
| 1428 | |
|
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1429 // Only append the previous method if it is executing on the stack. |
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1430 if (method->on_stack()) { |
|
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1431 |
|
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1432 if (_prev_methods == NULL) { |
|
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1433 // This is the first previous version so make some space. |
|
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1434 // Start with 2 elements under the assumption that the class |
|
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1435 // won't be redefined much. |
|
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1436 _prev_methods = new (ResourceObj::C_HEAP, mtClass) GrowableArray<Method*>(2, true); |
|
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1437 } |
| 0 | 1438 |
|
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1439 // RC_TRACE macro has an embedded ResourceMark |
|
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1440 RC_TRACE(0x00000100, |
|
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1441 ("add: %s(%s): adding prev version ref for cached method @%d", |
|
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1442 method->name()->as_C_string(), method->signature()->as_C_string(), |
|
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1443 _prev_methods->length())); |
| 0 | 1444 |
|
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1445 _prev_methods->append(method); |
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1446 } |
|
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1447 |
| 0 | 1448 |
|
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1449 // Since the caller is the VMThread and we are at a safepoint, this is a good |
|
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1450 // time to clear out unused method references. |
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1451 |
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1452 if (_prev_methods == NULL) return; |
| 0 | 1453 |
| 1454 for (int i = _prev_methods->length() - 1; i >= 0; i--) { | |
|
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1455 Method* method = _prev_methods->at(i); |
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1456 assert(method != NULL, "weak method ref was unexpectedly cleared"); |
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1457 |
|
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1458 if (!method->on_stack()) { |
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1459 // This method isn't running anymore so remove it |
| 0 | 1460 _prev_methods->remove_at(i); |
|
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1461 MetadataFactory::free_metadata(method->method_holder()->class_loader_data(), method); |
| 0 | 1462 } else { |
| 1463 // RC_TRACE macro has an embedded ResourceMark | |
|
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1464 RC_TRACE(0x00000400, |
|
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1465 ("add: %s(%s): previous cached method @%d is alive", |
|
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1466 method->name()->as_C_string(), method->signature()->as_C_string(), i)); |
| 0 | 1467 } |
| 1468 } | |
| 1469 } // end add_previous_version() | |
| 1470 | |
| 1471 | |
|
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1472 bool ActiveMethodOopsCache::is_same_method(const Method* method) const { |
|
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1473 InstanceKlass* ik = InstanceKlass::cast(klass()); |
|
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1474 const Method* check_method = ik->method_with_idnum(method_idnum()); |
| 0 | 1475 assert(check_method != NULL, "sanity check"); |
| 1476 if (check_method == method) { | |
| 1477 // done with the easy case | |
| 1478 return true; | |
| 1479 } | |
| 1480 | |
| 1481 if (_prev_methods != NULL) { | |
| 1482 // The cached method has been redefined at least once so search | |
| 1483 // the previous versions for a match. | |
| 1484 for (int i = 0; i < _prev_methods->length(); i++) { | |
|
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1485 check_method = _prev_methods->at(i); |
| 0 | 1486 if (check_method == method) { |
| 1487 // a previous version matches | |
| 1488 return true; | |
| 1489 } | |
| 1490 } | |
| 1491 } | |
| 1492 | |
| 1493 // either no previous versions or no previous version matched | |
| 1494 return false; | |
| 1495 } | |
| 1496 | |
| 1497 | |
|
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1498 Method* LatestMethodOopCache::get_Method() { |
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da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
1499 InstanceKlass* ik = InstanceKlass::cast(klass()); |
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da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
1500 Method* m = ik->method_with_idnum(method_idnum()); |
| 0 | 1501 assert(m != NULL, "sanity check"); |
| 1502 return m; | |
| 1503 } | |
| 1504 | |
| 1505 | |
| 1506 #ifdef ASSERT | |
| 1507 // Release dummy object(s) at bottom of heap | |
| 1508 bool Universe::release_fullgc_alot_dummy() { | |
| 1509 MutexLocker ml(FullGCALot_lock); | |
| 1510 if (_fullgc_alot_dummy_array != NULL) { | |
| 1511 if (_fullgc_alot_dummy_next >= _fullgc_alot_dummy_array->length()) { | |
| 1512 // No more dummies to release, release entire array instead | |
| 1513 _fullgc_alot_dummy_array = NULL; | |
| 1514 return false; | |
| 1515 } | |
| 1516 if (!UseConcMarkSweepGC) { | |
| 1517 // Release dummy at bottom of old generation | |
| 1518 _fullgc_alot_dummy_array->obj_at_put(_fullgc_alot_dummy_next++, NULL); | |
| 1519 } | |
| 1520 // Release dummy at bottom of permanent generation | |
| 1521 _fullgc_alot_dummy_array->obj_at_put(_fullgc_alot_dummy_next++, NULL); | |
| 1522 } | |
| 1523 return true; | |
| 1524 } | |
| 1525 | |
| 1526 #endif // ASSERT |