Mercurial > hg > graal-compiler
annotate src/share/vm/memory/universe.cpp @ 14495:cd5d10655495
8027754: Enable loop optimizations for loops with MathExact inside
Reviewed-by: kvn, iveresov
author | rbackman |
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date | Thu, 23 Jan 2014 12:08:28 +0100 |
parents | 8a9bb7821e28 |
children | d8041d695d19 |
rev | line source |
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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/arguments.hpp" | |
56 #include "runtime/deoptimization.hpp" | |
57 #include "runtime/fprofiler.hpp" | |
58 #include "runtime/handles.inline.hpp" | |
59 #include "runtime/init.hpp" | |
60 #include "runtime/java.hpp" | |
61 #include "runtime/javaCalls.hpp" | |
62 #include "runtime/sharedRuntime.hpp" | |
63 #include "runtime/synchronizer.hpp" | |
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64 #include "runtime/thread.inline.hpp" |
1972 | 65 #include "runtime/timer.hpp" |
66 #include "runtime/vm_operations.hpp" | |
67 #include "services/memoryService.hpp" | |
68 #include "utilities/copy.hpp" | |
69 #include "utilities/events.hpp" | |
70 #include "utilities/hashtable.inline.hpp" | |
71 #include "utilities/preserveException.hpp" | |
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72 #include "utilities/macros.hpp" |
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73 #if INCLUDE_ALL_GCS |
1972 | 74 #include "gc_implementation/concurrentMarkSweep/cmsAdaptiveSizePolicy.hpp" |
75 #include "gc_implementation/concurrentMarkSweep/cmsCollectorPolicy.hpp" | |
76 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp" | |
77 #include "gc_implementation/g1/g1CollectorPolicy.hpp" | |
78 #include "gc_implementation/parallelScavenge/parallelScavengeHeap.hpp" | |
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79 #endif // INCLUDE_ALL_GCS |
0 | 80 |
81 // Known objects | |
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82 Klass* Universe::_boolArrayKlassObj = NULL; |
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83 Klass* Universe::_byteArrayKlassObj = NULL; |
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84 Klass* Universe::_charArrayKlassObj = NULL; |
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85 Klass* Universe::_intArrayKlassObj = NULL; |
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86 Klass* Universe::_shortArrayKlassObj = NULL; |
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87 Klass* Universe::_longArrayKlassObj = NULL; |
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88 Klass* Universe::_singleArrayKlassObj = NULL; |
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89 Klass* Universe::_doubleArrayKlassObj = NULL; |
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90 Klass* Universe::_typeArrayKlassObjs[T_VOID+1] = { NULL /*, NULL...*/ }; |
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91 Klass* Universe::_objectArrayKlassObj = NULL; |
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92 oop Universe::_int_mirror = NULL; |
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93 oop Universe::_float_mirror = NULL; |
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94 oop Universe::_double_mirror = NULL; |
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95 oop Universe::_byte_mirror = NULL; |
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96 oop Universe::_bool_mirror = NULL; |
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97 oop Universe::_char_mirror = NULL; |
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98 oop Universe::_long_mirror = NULL; |
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99 oop Universe::_short_mirror = NULL; |
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100 oop Universe::_void_mirror = NULL; |
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101 oop Universe::_mirrors[T_VOID+1] = { NULL /*, NULL...*/ }; |
0 | 102 oop Universe::_main_thread_group = NULL; |
103 oop Universe::_system_thread_group = NULL; | |
104 objArrayOop Universe::_the_empty_class_klass_array = NULL; | |
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105 Array<Klass*>* Universe::_the_array_interfaces_array = NULL; |
1080
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106 oop Universe::_the_null_string = NULL; |
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107 oop Universe::_the_min_jint_string = NULL; |
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108 LatestMethodCache* Universe::_finalizer_register_cache = NULL; |
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109 LatestMethodCache* Universe::_loader_addClass_cache = NULL; |
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110 LatestMethodCache* Universe::_pd_implies_cache = NULL; |
0 | 111 oop Universe::_out_of_memory_error_java_heap = NULL; |
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112 oop Universe::_out_of_memory_error_metaspace = NULL; |
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113 oop Universe::_out_of_memory_error_class_metaspace = NULL; |
0 | 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 Method* Universe::_throw_illegal_access_error = NULL; |
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124 Array<int>* Universe::_the_empty_int_array = NULL; |
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125 Array<u2>* Universe::_the_empty_short_array = NULL; |
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126 Array<Klass*>* Universe::_the_empty_klass_array = NULL; |
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127 Array<Method*>* Universe::_the_empty_method_array = NULL; |
0 | 128 |
129 // These variables are guarded by FullGCALot_lock. | |
130 debug_only(objArrayOop Universe::_fullgc_alot_dummy_array = NULL;) | |
131 debug_only(int Universe::_fullgc_alot_dummy_next = 0;) | |
132 | |
133 // Heap | |
134 int Universe::_verify_count = 0; | |
135 | |
136 int Universe::_base_vtable_size = 0; | |
137 bool Universe::_bootstrapping = false; | |
138 bool Universe::_fully_initialized = false; | |
139 | |
140 size_t Universe::_heap_capacity_at_last_gc; | |
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141 size_t Universe::_heap_used_at_last_gc = 0; |
0 | 142 |
143 CollectedHeap* Universe::_collectedHeap = NULL; | |
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144 |
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145 NarrowPtrStruct Universe::_narrow_oop = { NULL, 0, true }; |
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146 NarrowPtrStruct Universe::_narrow_klass = { NULL, 0, true }; |
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147 address Universe::_narrow_ptrs_base; |
0 | 148 |
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149 void Universe::basic_type_classes_do(void f(Klass*)) { |
0 | 150 f(boolArrayKlassObj()); |
151 f(byteArrayKlassObj()); | |
152 f(charArrayKlassObj()); | |
153 f(intArrayKlassObj()); | |
154 f(shortArrayKlassObj()); | |
155 f(longArrayKlassObj()); | |
156 f(singleArrayKlassObj()); | |
157 f(doubleArrayKlassObj()); | |
158 } | |
159 | |
160 void Universe::oops_do(OopClosure* f, bool do_all) { | |
161 | |
162 f->do_oop((oop*) &_int_mirror); | |
163 f->do_oop((oop*) &_float_mirror); | |
164 f->do_oop((oop*) &_double_mirror); | |
165 f->do_oop((oop*) &_byte_mirror); | |
166 f->do_oop((oop*) &_bool_mirror); | |
167 f->do_oop((oop*) &_char_mirror); | |
168 f->do_oop((oop*) &_long_mirror); | |
169 f->do_oop((oop*) &_short_mirror); | |
170 f->do_oop((oop*) &_void_mirror); | |
171 | |
172 for (int i = T_BOOLEAN; i < T_VOID+1; i++) { | |
173 f->do_oop((oop*) &_mirrors[i]); | |
174 } | |
175 assert(_mirrors[0] == NULL && _mirrors[T_BOOLEAN - 1] == NULL, "checking"); | |
176 | |
177 f->do_oop((oop*)&_the_empty_class_klass_array); | |
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178 f->do_oop((oop*)&_the_null_string); |
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179 f->do_oop((oop*)&_the_min_jint_string); |
0 | 180 f->do_oop((oop*)&_out_of_memory_error_java_heap); |
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181 f->do_oop((oop*)&_out_of_memory_error_metaspace); |
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182 f->do_oop((oop*)&_out_of_memory_error_class_metaspace); |
0 | 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); |
11010 | 226 _pd_implies_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()); |
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533 s_h() != NULL; |
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534 s_h = KlassHandle(THREAD, s_h()->next_sibling())) { |
0 | 535 reinitialize_vtable_of(s_h, CHECK); |
536 } | |
537 } | |
538 } | |
539 | |
540 | |
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541 void initialize_itable_for_klass(Klass* k, TRAPS) { |
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542 InstanceKlass::cast(k)->itable()->initialize_itable(false, CHECK); |
0 | 543 } |
544 | |
545 | |
546 void Universe::reinitialize_itables(TRAPS) { | |
547 SystemDictionary::classes_do(initialize_itable_for_klass, CHECK); | |
548 | |
549 } | |
550 | |
551 | |
552 bool Universe::on_page_boundary(void* addr) { | |
553 return ((uintptr_t) addr) % os::vm_page_size() == 0; | |
554 } | |
555 | |
556 | |
557 bool Universe::should_fill_in_stack_trace(Handle throwable) { | |
558 // never attempt to fill in the stack trace of preallocated errors that do not have | |
559 // backtrace. These errors are kept alive forever and may be "re-used" when all | |
560 // preallocated errors with backtrace have been consumed. Also need to avoid | |
561 // a potential loop which could happen if an out of memory occurs when attempting | |
562 // to allocate the backtrace. | |
563 return ((throwable() != Universe::_out_of_memory_error_java_heap) && | |
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564 (throwable() != Universe::_out_of_memory_error_metaspace) && |
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565 (throwable() != Universe::_out_of_memory_error_class_metaspace) && |
0 | 566 (throwable() != Universe::_out_of_memory_error_array_size) && |
567 (throwable() != Universe::_out_of_memory_error_gc_overhead_limit)); | |
568 } | |
569 | |
570 | |
571 oop Universe::gen_out_of_memory_error(oop default_err) { | |
572 // generate an out of memory error: | |
573 // - if there is a preallocated error with backtrace available then return it wth | |
574 // a filled in stack trace. | |
575 // - if there are no preallocated errors with backtrace available then return | |
576 // an error without backtrace. | |
577 int next; | |
578 if (_preallocated_out_of_memory_error_avail_count > 0) { | |
579 next = (int)Atomic::add(-1, &_preallocated_out_of_memory_error_avail_count); | |
580 assert(next < (int)PreallocatedOutOfMemoryErrorCount, "avail count is corrupt"); | |
581 } else { | |
582 next = -1; | |
583 } | |
584 if (next < 0) { | |
585 // all preallocated errors have been used. | |
586 // return default | |
587 return default_err; | |
588 } else { | |
589 // get the error object at the slot and set set it to NULL so that the | |
590 // array isn't keeping it alive anymore. | |
591 oop exc = preallocated_out_of_memory_errors()->obj_at(next); | |
592 assert(exc != NULL, "slot has been used already"); | |
593 preallocated_out_of_memory_errors()->obj_at_put(next, NULL); | |
594 | |
595 // use the message from the default error | |
596 oop msg = java_lang_Throwable::message(default_err); | |
597 assert(msg != NULL, "no message"); | |
598 java_lang_Throwable::set_message(exc, msg); | |
599 | |
600 // populate the stack trace and return it. | |
601 java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(exc); | |
602 return exc; | |
603 } | |
604 } | |
605 | |
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606 intptr_t Universe::_non_oop_bits = 0; |
0 | 607 |
608 void* Universe::non_oop_word() { | |
609 // Neither the high bits nor the low bits of this value is allowed | |
610 // to look like (respectively) the high or low bits of a real oop. | |
611 // | |
612 // High and low are CPU-specific notions, but low always includes | |
613 // the low-order bit. Since oops are always aligned at least mod 4, | |
614 // setting the low-order bit will ensure that the low half of the | |
615 // word will never look like that of a real oop. | |
616 // | |
617 // Using the OS-supplied non-memory-address word (usually 0 or -1) | |
618 // will take care of the high bits, however many there are. | |
619 | |
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620 if (_non_oop_bits == 0) { |
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621 _non_oop_bits = (intptr_t)os::non_memory_address_word() | 1; |
0 | 622 } |
623 | |
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624 return (void*)_non_oop_bits; |
0 | 625 } |
626 | |
627 jint universe_init() { | |
628 assert(!Universe::_fully_initialized, "called after initialize_vtables"); | |
629 guarantee(1 << LogHeapWordSize == sizeof(HeapWord), | |
630 "LogHeapWordSize is incorrect."); | |
631 guarantee(sizeof(oop) >= sizeof(HeapWord), "HeapWord larger than oop?"); | |
632 guarantee(sizeof(oop) % sizeof(HeapWord) == 0, | |
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633 "oop size is not not a multiple of HeapWord size"); |
0 | 634 TraceTime timer("Genesis", TraceStartupTime); |
635 GC_locker::lock(); // do not allow gc during bootstrapping | |
636 JavaClasses::compute_hard_coded_offsets(); | |
637 | |
638 jint status = Universe::initialize_heap(); | |
639 if (status != JNI_OK) { | |
640 return status; | |
641 } | |
642 | |
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643 Metaspace::global_initialize(); |
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644 |
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645 // Create memory for metadata. Must be after initializing heap for |
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646 // DumpSharedSpaces. |
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647 ClassLoaderData::init_null_class_loader_data(); |
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648 |
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649 // We have a heap so create the Method* caches before |
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650 // Metaspace::initialize_shared_spaces() tries to populate them. |
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651 Universe::_finalizer_register_cache = new LatestMethodCache(); |
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652 Universe::_loader_addClass_cache = new LatestMethodCache(); |
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653 Universe::_pd_implies_cache = new LatestMethodCache(); |
0 | 654 |
655 if (UseSharedSpaces) { | |
656 // Read the data structures supporting the shared spaces (shared | |
657 // system dictionary, symbol table, etc.). After that, access to | |
658 // the file (other than the mapped regions) is no longer needed, and | |
659 // the file is closed. Closing the file does not affect the | |
660 // currently mapped regions. | |
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661 MetaspaceShared::initialize_shared_spaces(); |
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662 StringTable::create_table(); |
0 | 663 } else { |
664 SymbolTable::create_table(); | |
665 StringTable::create_table(); | |
666 ClassLoader::create_package_info_table(); | |
667 } | |
668 | |
669 return JNI_OK; | |
670 } | |
671 | |
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672 // Choose the heap base address and oop encoding mode |
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673 // when compressed oops are used: |
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674 // Unscaled - Use 32-bits oops without encoding when |
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675 // NarrowOopHeapBaseMin + heap_size < 4Gb |
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676 // ZeroBased - Use zero based compressed oops with encoding when |
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677 // NarrowOopHeapBaseMin + heap_size < 32Gb |
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678 // HeapBased - Use compressed oops with heap base + encoding. |
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679 |
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680 // 4Gb |
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681 static const uint64_t UnscaledOopHeapMax = (uint64_t(max_juint) + 1); |
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682 // 32Gb |
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683 // OopEncodingHeapMax == UnscaledOopHeapMax << LogMinObjAlignmentInBytes; |
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684 |
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685 char* Universe::preferred_heap_base(size_t heap_size, size_t alignment, NARROW_OOP_MODE mode) { |
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686 assert(is_size_aligned((size_t)OopEncodingHeapMax, alignment), "Must be"); |
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687 assert(is_size_aligned((size_t)UnscaledOopHeapMax, alignment), "Must be"); |
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688 assert(is_size_aligned(heap_size, alignment), "Must be"); |
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689 |
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690 uintx heap_base_min_address_aligned = align_size_up(HeapBaseMinAddress, alignment); |
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691 |
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692 size_t base = 0; |
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693 #ifdef _LP64 |
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694 if (UseCompressedOops) { |
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695 assert(mode == UnscaledNarrowOop || |
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696 mode == ZeroBasedNarrowOop || |
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697 mode == HeapBasedNarrowOop, "mode is invalid"); |
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698 const size_t total_size = heap_size + heap_base_min_address_aligned; |
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699 // Return specified base for the first request. |
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700 if (!FLAG_IS_DEFAULT(HeapBaseMinAddress) && (mode == UnscaledNarrowOop)) { |
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701 base = heap_base_min_address_aligned; |
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702 |
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703 // If the total size is small enough to allow UnscaledNarrowOop then |
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704 // just use UnscaledNarrowOop. |
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705 } else if ((total_size <= OopEncodingHeapMax) && (mode != HeapBasedNarrowOop)) { |
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706 if ((total_size <= UnscaledOopHeapMax) && (mode == UnscaledNarrowOop) && |
642
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707 (Universe::narrow_oop_shift() == 0)) { |
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708 // Use 32-bits oops without encoding and |
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709 // place heap's top on the 4Gb boundary |
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710 base = (UnscaledOopHeapMax - heap_size); |
642
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711 } else { |
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712 // Can't reserve with NarrowOopShift == 0 |
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713 Universe::set_narrow_oop_shift(LogMinObjAlignmentInBytes); |
13000
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714 |
642
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715 if (mode == UnscaledNarrowOop || |
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716 mode == ZeroBasedNarrowOop && total_size <= UnscaledOopHeapMax) { |
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717 |
642
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718 // Use zero based compressed oops with encoding and |
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719 // place heap's top on the 32Gb boundary in case |
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720 // total_size > 4Gb or failed to reserve below 4Gb. |
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721 uint64_t heap_top = OopEncodingHeapMax; |
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722 |
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723 // For small heaps, save some space for compressed class pointer |
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724 // space so it can be decoded with no base. |
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725 if (UseCompressedClassPointers && !UseSharedSpaces && |
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726 OopEncodingHeapMax <= 32*G) { |
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|
727 |
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728 uint64_t class_space = align_size_up(CompressedClassSpaceSize, alignment); |
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729 assert(is_size_aligned((size_t)OopEncodingHeapMax-class_space, |
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730 alignment), "difference must be aligned too"); |
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731 uint64_t new_top = OopEncodingHeapMax-class_space; |
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732 |
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733 if (total_size <= new_top) { |
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|
734 heap_top = new_top; |
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735 } |
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|
736 } |
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|
737 |
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738 // Align base to the adjusted top of the heap |
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739 base = heap_top - heap_size; |
642
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740 } |
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741 } |
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742 } else { |
7982
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743 // UnscaledNarrowOop encoding didn't work, and no base was found for ZeroBasedOops or |
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744 // HeapBasedNarrowOop encoding was requested. So, can't reserve below 32Gb. |
642
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745 Universe::set_narrow_oop_shift(LogMinObjAlignmentInBytes); |
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746 } |
7982
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|
747 |
1057
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|
748 // Set narrow_oop_base and narrow_oop_use_implicit_null_checks |
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749 // used in ReservedHeapSpace() constructors. |
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750 // The final values will be set in initialize_heap() below. |
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751 if ((base != 0) && ((base + heap_size) <= OopEncodingHeapMax)) { |
1057
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752 // Use zero based compressed oops |
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|
753 Universe::set_narrow_oop_base(NULL); |
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754 // Don't need guard page for implicit checks in indexed |
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755 // addressing mode with zero based Compressed Oops. |
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756 Universe::set_narrow_oop_use_implicit_null_checks(true); |
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757 } else { |
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|
758 // Set to a non-NULL value so the ReservedSpace ctor computes |
f334aec453a1
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|
759 // the correct no-access prefix. |
f334aec453a1
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|
760 // The final value will be set in initialize_heap() below. |
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|
761 Universe::set_narrow_oop_base((address)UnscaledOopHeapMax); |
14411 | 762 #if defined(_WIN64) || defined(AIX) |
1057
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763 if (UseLargePages) { |
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|
764 // Cannot allocate guard pages for implicit checks in indexed |
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|
765 // addressing mode when large pages are specified on windows. |
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|
766 Universe::set_narrow_oop_use_implicit_null_checks(false); |
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|
767 } |
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|
768 #endif // _WIN64 |
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|
769 } |
642
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|
770 } |
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|
771 #endif |
12110
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|
772 |
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|
773 assert(is_ptr_aligned((char*)base, alignment), "Must be"); |
1057
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774 return (char*)base; // also return NULL (don't care) for 32-bit VM |
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775 } |
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|
776 |
0 | 777 jint Universe::initialize_heap() { |
778 | |
779 if (UseParallelGC) { | |
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780 #if INCLUDE_ALL_GCS |
0 | 781 Universe::_collectedHeap = new ParallelScavengeHeap(); |
8001
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782 #else // INCLUDE_ALL_GCS |
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|
783 fatal("UseParallelGC not supported in this VM."); |
8001
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784 #endif // INCLUDE_ALL_GCS |
0 | 785 |
342
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786 } else if (UseG1GC) { |
8001
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787 #if INCLUDE_ALL_GCS |
4013 | 788 G1CollectorPolicy* g1p = new G1CollectorPolicy(); |
13060
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789 g1p->initialize_all(); |
342
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790 G1CollectedHeap* g1h = new G1CollectedHeap(g1p); |
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791 Universe::_collectedHeap = g1h; |
8001
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|
792 #else // INCLUDE_ALL_GCS |
342
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|
793 fatal("UseG1GC not supported in java kernel vm."); |
8001
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|
794 #endif // INCLUDE_ALL_GCS |
342
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|
795 |
0 | 796 } else { |
797 GenCollectorPolicy *gc_policy; | |
798 | |
799 if (UseSerialGC) { | |
800 gc_policy = new MarkSweepPolicy(); | |
801 } else if (UseConcMarkSweepGC) { | |
8001
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|
802 #if INCLUDE_ALL_GCS |
0 | 803 if (UseAdaptiveSizePolicy) { |
804 gc_policy = new ASConcurrentMarkSweepPolicy(); | |
805 } else { | |
806 gc_policy = new ConcurrentMarkSweepPolicy(); | |
807 } | |
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808 #else // INCLUDE_ALL_GCS |
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|
809 fatal("UseConcMarkSweepGC not supported in this VM."); |
8001
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|
810 #endif // INCLUDE_ALL_GCS |
0 | 811 } else { // default old generation |
812 gc_policy = new MarkSweepPolicy(); | |
813 } | |
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|
814 gc_policy->initialize_all(); |
0 | 815 |
816 Universe::_collectedHeap = new GenCollectedHeap(gc_policy); | |
817 } | |
818 | |
14310 | 819 ThreadLocalAllocBuffer::set_max_size(Universe::heap()->max_tlab_size()); |
820 | |
0 | 821 jint status = Universe::heap()->initialize(); |
822 if (status != JNI_OK) { | |
823 return status; | |
824 } | |
642
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825 |
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|
826 #ifdef _LP64 |
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|
827 if (UseCompressedOops) { |
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828 // Subtract a page because something can get allocated at heap base. |
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829 // This also makes implicit null checking work, because the |
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|
830 // memory+1 page below heap_base needs to cause a signal. |
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|
831 // See needs_explicit_null_check. |
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|
832 // Only set the heap base for compressed oops because it indicates |
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|
833 // compressed oops for pstack code. |
2080 | 834 bool verbose = PrintCompressedOopsMode || (PrintMiscellaneous && Verbose); |
835 if (verbose) { | |
642
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|
836 tty->cr(); |
1963 | 837 tty->print("heap address: " PTR_FORMAT ", size: " SIZE_FORMAT " MB", |
838 Universe::heap()->base(), Universe::heap()->reserved_region().byte_size()/M); | |
642
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839 } |
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|
840 if (((uint64_t)Universe::heap()->reserved_region().end() > OopEncodingHeapMax)) { |
642
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|
841 // Can't reserve heap below 32Gb. |
6848
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7054512: Compress class pointers after perm gen removal
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842 // keep the Universe::narrow_oop_base() set in Universe::reserve_heap() |
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843 Universe::set_narrow_oop_shift(LogMinObjAlignmentInBytes); |
14411 | 844 #ifdef AIX |
845 // There is no protected page before the heap. This assures all oops | |
846 // are decoded so that NULL is preserved, so this page will not be accessed. | |
847 Universe::set_narrow_oop_use_implicit_null_checks(false); | |
848 #endif | |
2080 | 849 if (verbose) { |
10405 | 850 tty->print(", %s: "PTR_FORMAT, |
851 narrow_oop_mode_to_string(HeapBasedNarrowOop), | |
852 Universe::narrow_oop_base()); | |
642
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853 } |
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854 } else { |
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855 Universe::set_narrow_oop_base(0); |
2080 | 856 if (verbose) { |
10405 | 857 tty->print(", %s", narrow_oop_mode_to_string(ZeroBasedNarrowOop)); |
642
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858 } |
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859 #ifdef _WIN64 |
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860 if (!Universe::narrow_oop_use_implicit_null_checks()) { |
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861 // Don't need guard page for implicit checks in indexed addressing |
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862 // mode with zero based Compressed Oops. |
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863 Universe::set_narrow_oop_use_implicit_null_checks(true); |
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864 } |
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865 #endif // _WIN64 |
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866 if((uint64_t)Universe::heap()->reserved_region().end() > UnscaledOopHeapMax) { |
642
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867 // Can't reserve heap below 4Gb. |
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868 Universe::set_narrow_oop_shift(LogMinObjAlignmentInBytes); |
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869 } else { |
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870 Universe::set_narrow_oop_shift(0); |
2080 | 871 if (verbose) { |
10405 | 872 tty->print(", %s", narrow_oop_mode_to_string(UnscaledNarrowOop)); |
642
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873 } |
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874 } |
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875 } |
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876 |
2080 | 877 if (verbose) { |
642
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878 tty->cr(); |
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879 tty->cr(); |
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880 } |
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881 Universe::set_narrow_ptrs_base(Universe::narrow_oop_base()); |
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882 } |
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883 // Universe::narrow_oop_base() is one page below the heap. |
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884 assert((intptr_t)Universe::narrow_oop_base() <= (intptr_t)(Universe::heap()->base() - |
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885 os::vm_page_size()) || |
642
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886 Universe::narrow_oop_base() == NULL, "invalid value"); |
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887 assert(Universe::narrow_oop_shift() == LogMinObjAlignmentInBytes || |
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888 Universe::narrow_oop_shift() == 0, "invalid value"); |
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889 #endif |
0 | 890 |
891 // We will never reach the CATCH below since Exceptions::_throw will cause | |
892 // the VM to exit if an exception is thrown during initialization | |
893 | |
894 if (UseTLAB) { | |
895 assert(Universe::heap()->supports_tlab_allocation(), | |
896 "Should support thread-local allocation buffers"); | |
897 ThreadLocalAllocBuffer::startup_initialization(); | |
898 } | |
899 return JNI_OK; | |
900 } | |
901 | |
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902 |
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903 // Reserve the Java heap, which is now the same for all GCs. |
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904 ReservedSpace Universe::reserve_heap(size_t heap_size, size_t alignment) { |
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905 assert(alignment <= Arguments::conservative_max_heap_alignment(), |
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906 err_msg("actual alignment "SIZE_FORMAT" must be within maximum heap alignment "SIZE_FORMAT, |
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907 alignment, Arguments::conservative_max_heap_alignment())); |
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908 size_t total_reserved = align_size_up(heap_size, alignment); |
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909 assert(!UseCompressedOops || (total_reserved <= (OopEncodingHeapMax - os::vm_page_size())), |
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910 "heap size is too big for compressed oops"); |
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911 |
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912 bool use_large_pages = UseLargePages && is_size_aligned(alignment, os::large_page_size()); |
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913 assert(!UseLargePages |
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914 || UseParallelGC |
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915 || use_large_pages, "Wrong alignment to use large pages"); |
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916 |
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917 char* addr = Universe::preferred_heap_base(total_reserved, alignment, Universe::UnscaledNarrowOop); |
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918 |
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919 ReservedHeapSpace total_rs(total_reserved, alignment, use_large_pages, addr); |
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920 |
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921 if (UseCompressedOops) { |
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922 if (addr != NULL && !total_rs.is_reserved()) { |
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923 // Failed to reserve at specified address - the requested memory |
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924 // region is taken already, for example, by 'java' launcher. |
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925 // Try again to reserver heap higher. |
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926 addr = Universe::preferred_heap_base(total_reserved, alignment, Universe::ZeroBasedNarrowOop); |
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927 |
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928 ReservedHeapSpace total_rs0(total_reserved, alignment, |
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929 use_large_pages, addr); |
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930 |
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931 if (addr != NULL && !total_rs0.is_reserved()) { |
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932 // Failed to reserve at specified address again - give up. |
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933 addr = Universe::preferred_heap_base(total_reserved, alignment, Universe::HeapBasedNarrowOop); |
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934 assert(addr == NULL, ""); |
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935 |
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936 ReservedHeapSpace total_rs1(total_reserved, alignment, |
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937 use_large_pages, addr); |
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938 total_rs = total_rs1; |
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939 } else { |
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940 total_rs = total_rs0; |
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941 } |
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942 } |
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943 } |
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944 |
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945 if (!total_rs.is_reserved()) { |
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946 vm_exit_during_initialization(err_msg("Could not reserve enough space for " SIZE_FORMAT "KB object heap", total_reserved/K)); |
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947 return total_rs; |
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948 } |
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949 |
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950 if (UseCompressedOops) { |
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951 // Universe::initialize_heap() will reset this to NULL if unscaled |
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952 // or zero-based narrow oops are actually used. |
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953 address base = (address)(total_rs.base() - os::vm_page_size()); |
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954 Universe::set_narrow_oop_base(base); |
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955 } |
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956 return total_rs; |
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957 } |
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958 |
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959 |
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960 // It's the caller's responsibility to ensure glitch-freedom |
0 | 961 // (if required). |
962 void Universe::update_heap_info_at_gc() { | |
963 _heap_capacity_at_last_gc = heap()->capacity(); | |
964 _heap_used_at_last_gc = heap()->used(); | |
965 } | |
966 | |
967 | |
10405 | 968 const char* Universe::narrow_oop_mode_to_string(Universe::NARROW_OOP_MODE mode) { |
969 switch (mode) { | |
970 case UnscaledNarrowOop: | |
971 return "32-bits Oops"; | |
972 case ZeroBasedNarrowOop: | |
973 return "zero based Compressed Oops"; | |
974 case HeapBasedNarrowOop: | |
975 return "Compressed Oops with base"; | |
976 } | |
977 | |
978 ShouldNotReachHere(); | |
979 return ""; | |
980 } | |
981 | |
982 | |
983 Universe::NARROW_OOP_MODE Universe::narrow_oop_mode() { | |
984 if (narrow_oop_base() != 0) { | |
985 return HeapBasedNarrowOop; | |
986 } | |
987 | |
988 if (narrow_oop_shift() != 0) { | |
989 return ZeroBasedNarrowOop; | |
990 } | |
991 | |
992 return UnscaledNarrowOop; | |
993 } | |
994 | |
0 | 995 |
996 void universe2_init() { | |
997 EXCEPTION_MARK; | |
998 Universe::genesis(CATCH); | |
999 } | |
1000 | |
1001 | |
1002 // This function is defined in JVM.cpp | |
1003 extern void initialize_converter_functions(); | |
1004 | |
1005 bool universe_post_init() { | |
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1006 assert(!is_init_completed(), "Error: initialization not yet completed!"); |
0 | 1007 Universe::_fully_initialized = true; |
1008 EXCEPTION_MARK; | |
1009 { ResourceMark rm; | |
1010 Interpreter::initialize(); // needed for interpreter entry points | |
1011 if (!UseSharedSpaces) { | |
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1012 HandleMark hm(THREAD); |
1142 | 1013 KlassHandle ok_h(THREAD, SystemDictionary::Object_klass()); |
0 | 1014 Universe::reinitialize_vtable_of(ok_h, CHECK_false); |
1015 Universe::reinitialize_itables(CHECK_false); | |
1016 } | |
1017 } | |
1018 | |
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1019 HandleMark hm(THREAD); |
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1020 Klass* k; |
0 | 1021 instanceKlassHandle k_h; |
1022 // Setup preallocated empty java.lang.Class array | |
1142 | 1023 Universe::_the_empty_class_klass_array = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_false); |
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1024 |
0 | 1025 // Setup preallocated OutOfMemoryError errors |
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1026 k = SystemDictionary::resolve_or_fail(vmSymbols::java_lang_OutOfMemoryError(), true, CHECK_false); |
0 | 1027 k_h = instanceKlassHandle(THREAD, k); |
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1028 Universe::_out_of_memory_error_java_heap = k_h->allocate_instance(CHECK_false); |
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1029 Universe::_out_of_memory_error_metaspace = k_h->allocate_instance(CHECK_false); |
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1030 Universe::_out_of_memory_error_class_metaspace = k_h->allocate_instance(CHECK_false); |
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1031 Universe::_out_of_memory_error_array_size = k_h->allocate_instance(CHECK_false); |
0 | 1032 Universe::_out_of_memory_error_gc_overhead_limit = |
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1033 k_h->allocate_instance(CHECK_false); |
0 | 1034 |
1035 // Setup preallocated NullPointerException | |
1036 // (this is currently used for a cheap & dirty solution in compiler exception handling) | |
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1037 k = SystemDictionary::resolve_or_fail(vmSymbols::java_lang_NullPointerException(), true, CHECK_false); |
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1038 Universe::_null_ptr_exception_instance = InstanceKlass::cast(k)->allocate_instance(CHECK_false); |
0 | 1039 // Setup preallocated ArithmeticException |
1040 // (this is currently used for a cheap & dirty solution in compiler exception handling) | |
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1041 k = SystemDictionary::resolve_or_fail(vmSymbols::java_lang_ArithmeticException(), true, CHECK_false); |
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1042 Universe::_arithmetic_exception_instance = InstanceKlass::cast(k)->allocate_instance(CHECK_false); |
0 | 1043 // Virtual Machine Error for when we get into a situation we can't resolve |
1044 k = SystemDictionary::resolve_or_fail( | |
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1045 vmSymbols::java_lang_VirtualMachineError(), true, CHECK_false); |
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1046 bool linked = InstanceKlass::cast(k)->link_class_or_fail(CHECK_false); |
0 | 1047 if (!linked) { |
1048 tty->print_cr("Unable to link/verify VirtualMachineError class"); | |
1049 return false; // initialization failed | |
1050 } | |
1051 Universe::_virtual_machine_error_instance = | |
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1052 InstanceKlass::cast(k)->allocate_instance(CHECK_false); |
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1053 |
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1054 Universe::_vm_exception = InstanceKlass::cast(k)->allocate_instance(CHECK_false); |
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1055 |
0 | 1056 if (!DumpSharedSpaces) { |
1057 // These are the only Java fields that are currently set during shared space dumping. | |
1058 // We prefer to not handle this generally, so we always reinitialize these detail messages. | |
1059 Handle msg = java_lang_String::create_from_str("Java heap space", CHECK_false); | |
1060 java_lang_Throwable::set_message(Universe::_out_of_memory_error_java_heap, msg()); | |
1061 | |
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1062 msg = java_lang_String::create_from_str("Metaspace", CHECK_false); |
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1063 java_lang_Throwable::set_message(Universe::_out_of_memory_error_metaspace, msg()); |
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1064 msg = java_lang_String::create_from_str("Compressed class space", CHECK_false); |
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1065 java_lang_Throwable::set_message(Universe::_out_of_memory_error_class_metaspace, msg()); |
0 | 1066 |
1067 msg = java_lang_String::create_from_str("Requested array size exceeds VM limit", CHECK_false); | |
1068 java_lang_Throwable::set_message(Universe::_out_of_memory_error_array_size, msg()); | |
1069 | |
1070 msg = java_lang_String::create_from_str("GC overhead limit exceeded", CHECK_false); | |
1071 java_lang_Throwable::set_message(Universe::_out_of_memory_error_gc_overhead_limit, msg()); | |
1072 | |
1073 msg = java_lang_String::create_from_str("/ by zero", CHECK_false); | |
1074 java_lang_Throwable::set_message(Universe::_arithmetic_exception_instance, msg()); | |
1075 | |
1076 // Setup the array of errors that have preallocated backtrace | |
1077 k = Universe::_out_of_memory_error_java_heap->klass(); | |
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1078 assert(k->name() == vmSymbols::java_lang_OutOfMemoryError(), "should be out of memory error"); |
0 | 1079 k_h = instanceKlassHandle(THREAD, k); |
1080 | |
1081 int len = (StackTraceInThrowable) ? (int)PreallocatedOutOfMemoryErrorCount : 0; | |
1082 Universe::_preallocated_out_of_memory_error_array = oopFactory::new_objArray(k_h(), len, CHECK_false); | |
1083 for (int i=0; i<len; i++) { | |
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1084 oop err = k_h->allocate_instance(CHECK_false); |
0 | 1085 Handle err_h = Handle(THREAD, err); |
1086 java_lang_Throwable::allocate_backtrace(err_h, CHECK_false); | |
1087 Universe::preallocated_out_of_memory_errors()->obj_at_put(i, err_h()); | |
1088 } | |
1089 Universe::_preallocated_out_of_memory_error_avail_count = (jint)len; | |
1090 } | |
1091 | |
1092 | |
1093 // Setup static method for registering finalizers | |
1094 // The finalizer klass must be linked before looking up the method, in | |
1095 // case it needs to get rewritten. | |
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1096 InstanceKlass::cast(SystemDictionary::Finalizer_klass())->link_class(CHECK_false); |
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1097 Method* m = InstanceKlass::cast(SystemDictionary::Finalizer_klass())->find_method( |
0 | 1098 vmSymbols::register_method_name(), |
1099 vmSymbols::register_method_signature()); | |
1100 if (m == NULL || !m->is_static()) { | |
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1101 tty->print_cr("Unable to link/verify Finalizer.register method"); |
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1102 return false; // initialization failed (cannot throw exception yet) |
0 | 1103 } |
1104 Universe::_finalizer_register_cache->init( | |
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1105 SystemDictionary::Finalizer_klass(), m); |
0 | 1106 |
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1107 InstanceKlass::cast(SystemDictionary::misc_Unsafe_klass())->link_class(CHECK_false); |
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1108 m = InstanceKlass::cast(SystemDictionary::misc_Unsafe_klass())->find_method( |
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1109 vmSymbols::throwIllegalAccessError_name(), |
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1110 vmSymbols::void_method_signature()); |
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1111 if (m != NULL && !m->is_static()) { |
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1112 // Note null is okay; this method is used in itables, and if it is null, |
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1113 // then AbstractMethodError is thrown instead. |
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1114 tty->print_cr("Unable to link/verify Unsafe.throwIllegalAccessError method"); |
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1115 return false; // initialization failed (cannot throw exception yet) |
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1116 } |
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1117 Universe::_throw_illegal_access_error = m; |
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1118 |
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1119 // Setup method for registering loaded classes in class loader vector |
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1120 InstanceKlass::cast(SystemDictionary::ClassLoader_klass())->link_class(CHECK_false); |
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1121 m = InstanceKlass::cast(SystemDictionary::ClassLoader_klass())->find_method(vmSymbols::addClass_name(), vmSymbols::class_void_signature()); |
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1122 if (m == NULL || m->is_static()) { |
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1123 tty->print_cr("Unable to link/verify ClassLoader.addClass method"); |
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1124 return false; // initialization failed (cannot throw exception yet) |
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1125 } |
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1126 Universe::_loader_addClass_cache->init( |
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1127 SystemDictionary::ClassLoader_klass(), m); |
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1128 |
11010 | 1129 // Setup method for checking protection domain |
1130 InstanceKlass::cast(SystemDictionary::ProtectionDomain_klass())->link_class(CHECK_false); | |
1131 m = InstanceKlass::cast(SystemDictionary::ProtectionDomain_klass())-> | |
1132 find_method(vmSymbols::impliesCreateAccessControlContext_name(), | |
1133 vmSymbols::void_boolean_signature()); | |
1134 // Allow NULL which should only happen with bootstrapping. | |
1135 if (m != NULL) { | |
1136 if (m->is_static()) { | |
1137 // NoSuchMethodException doesn't actually work because it tries to run the | |
1138 // <init> function before java_lang_Class is linked. Print error and exit. | |
1139 tty->print_cr("ProtectionDomain.impliesCreateAccessControlContext() has the wrong linkage"); | |
1140 return false; // initialization failed | |
1141 } | |
1142 Universe::_pd_implies_cache->init( | |
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1143 SystemDictionary::ProtectionDomain_klass(), m);; |
11010 | 1144 } |
1145 | |
14309 | 1146 // The following is initializing converter functions for serialization in |
0 | 1147 // JVM.cpp. If we clean up the StrictMath code above we may want to find |
1148 // a better solution for this as well. | |
1149 initialize_converter_functions(); | |
1150 | |
1151 // This needs to be done before the first scavenge/gc, since | |
1152 // it's an input to soft ref clearing policy. | |
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1153 { |
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1154 MutexLocker x(Heap_lock); |
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1155 Universe::update_heap_info_at_gc(); |
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1156 } |
0 | 1157 |
1158 // ("weak") refs processing infrastructure initialization | |
1159 Universe::heap()->post_initialize(); | |
1160 | |
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1161 // Initialize performance counters for metaspaces |
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1162 MetaspaceCounters::initialize_performance_counters(); |
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1163 CompressedClassSpaceCounters::initialize_performance_counters(); |
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1164 |
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1165 MemoryService::add_metaspace_memory_pools(); |
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1166 |
0 | 1167 GC_locker::unlock(); // allow gc after bootstrapping |
1168 | |
1169 MemoryService::set_universe_heap(Universe::_collectedHeap); | |
1170 return true; | |
1171 } | |
1172 | |
1173 | |
1174 void Universe::compute_base_vtable_size() { | |
1175 _base_vtable_size = ClassLoader::compute_Object_vtable(); | |
1176 } | |
1177 | |
1178 | |
1179 // %%% The Universe::flush_foo methods belong in CodeCache. | |
1180 | |
1181 // Flushes compiled methods dependent on dependee. | |
1182 void Universe::flush_dependents_on(instanceKlassHandle dependee) { | |
1183 assert_lock_strong(Compile_lock); | |
1184 | |
1185 if (CodeCache::number_of_nmethods_with_dependencies() == 0) return; | |
1186 | |
1187 // CodeCache can only be updated by a thread_in_VM and they will all be | |
14309 | 1188 // stopped during the safepoint so CodeCache will be safe to update without |
0 | 1189 // holding the CodeCache_lock. |
1190 | |
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1191 KlassDepChange changes(dependee); |
0 | 1192 |
1193 // Compute the dependent nmethods | |
1194 if (CodeCache::mark_for_deoptimization(changes) > 0) { | |
1195 // At least one nmethod has been marked for deoptimization | |
1196 VM_Deoptimize op; | |
1197 VMThread::execute(&op); | |
1198 } | |
1199 } | |
1200 | |
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1201 // Flushes compiled methods dependent on a particular CallSite |
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1202 // instance when its target is different than the given MethodHandle. |
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1203 void Universe::flush_dependents_on(Handle call_site, Handle method_handle) { |
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1204 assert_lock_strong(Compile_lock); |
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1205 |
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1206 if (CodeCache::number_of_nmethods_with_dependencies() == 0) return; |
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1207 |
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1208 // CodeCache can only be updated by a thread_in_VM and they will all be |
14309 | 1209 // stopped during the safepoint so CodeCache will be safe to update without |
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1210 // holding the CodeCache_lock. |
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1211 |
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1212 CallSiteDepChange changes(call_site(), method_handle()); |
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1213 |
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1214 // Compute the dependent nmethods that have a reference to a |
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1215 // CallSite object. We use InstanceKlass::mark_dependent_nmethod |
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1216 // directly instead of CodeCache::mark_for_deoptimization because we |
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1217 // want dependents on the call site class only not all classes in |
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1218 // the ContextStream. |
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1219 int marked = 0; |
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1220 { |
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1221 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); |
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1222 InstanceKlass* call_site_klass = InstanceKlass::cast(call_site->klass()); |
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1223 marked = call_site_klass->mark_dependent_nmethods(changes); |
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1224 } |
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1225 if (marked > 0) { |
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1226 // At least one nmethod has been marked for deoptimization |
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1227 VM_Deoptimize op; |
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1228 VMThread::execute(&op); |
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1229 } |
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1230 } |
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1231 |
0 | 1232 #ifdef HOTSWAP |
1233 // Flushes compiled methods dependent on dependee in the evolutionary sense | |
1234 void Universe::flush_evol_dependents_on(instanceKlassHandle ev_k_h) { | |
1235 // --- Compile_lock is not held. However we are at a safepoint. | |
1236 assert_locked_or_safepoint(Compile_lock); | |
1237 if (CodeCache::number_of_nmethods_with_dependencies() == 0) return; | |
1238 | |
1239 // CodeCache can only be updated by a thread_in_VM and they will all be | |
14309 | 1240 // stopped during the safepoint so CodeCache will be safe to update without |
0 | 1241 // holding the CodeCache_lock. |
1242 | |
1243 // Compute the dependent nmethods | |
1244 if (CodeCache::mark_for_evol_deoptimization(ev_k_h) > 0) { | |
1245 // At least one nmethod has been marked for deoptimization | |
1246 | |
1247 // All this already happens inside a VM_Operation, so we'll do all the work here. | |
1248 // Stuff copied from VM_Deoptimize and modified slightly. | |
1249 | |
1250 // We do not want any GCs to happen while we are in the middle of this VM operation | |
1251 ResourceMark rm; | |
1252 DeoptimizationMarker dm; | |
1253 | |
1254 // Deoptimize all activations depending on marked nmethods | |
1255 Deoptimization::deoptimize_dependents(); | |
1256 | |
1257 // Make the dependent methods not entrant (in VM_Deoptimize they are made zombies) | |
1258 CodeCache::make_marked_nmethods_not_entrant(); | |
1259 } | |
1260 } | |
1261 #endif // HOTSWAP | |
1262 | |
1263 | |
1264 // Flushes compiled methods dependent on dependee | |
1265 void Universe::flush_dependents_on_method(methodHandle m_h) { | |
1266 // --- Compile_lock is not held. However we are at a safepoint. | |
1267 assert_locked_or_safepoint(Compile_lock); | |
1268 | |
1269 // CodeCache can only be updated by a thread_in_VM and they will all be | |
1270 // stopped dring the safepoint so CodeCache will be safe to update without | |
1271 // holding the CodeCache_lock. | |
1272 | |
1273 // Compute the dependent nmethods | |
1274 if (CodeCache::mark_for_deoptimization(m_h()) > 0) { | |
1275 // At least one nmethod has been marked for deoptimization | |
1276 | |
1277 // All this already happens inside a VM_Operation, so we'll do all the work here. | |
1278 // Stuff copied from VM_Deoptimize and modified slightly. | |
1279 | |
1280 // We do not want any GCs to happen while we are in the middle of this VM operation | |
1281 ResourceMark rm; | |
1282 DeoptimizationMarker dm; | |
1283 | |
1284 // Deoptimize all activations depending on marked nmethods | |
1285 Deoptimization::deoptimize_dependents(); | |
1286 | |
1287 // Make the dependent methods not entrant (in VM_Deoptimize they are made zombies) | |
1288 CodeCache::make_marked_nmethods_not_entrant(); | |
1289 } | |
1290 } | |
1291 | |
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1292 void Universe::print() { |
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1293 print_on(gclog_or_tty); |
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1294 } |
0 | 1295 |
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1296 void Universe::print_on(outputStream* st, bool extended) { |
0 | 1297 st->print_cr("Heap"); |
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1298 if (!extended) { |
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1299 heap()->print_on(st); |
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1300 } else { |
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1301 heap()->print_extended_on(st); |
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1302 } |
0 | 1303 } |
1304 | |
1305 void Universe::print_heap_at_SIGBREAK() { | |
1306 if (PrintHeapAtSIGBREAK) { | |
1307 MutexLocker hl(Heap_lock); | |
1308 print_on(tty); | |
1309 tty->cr(); | |
1310 tty->flush(); | |
1311 } | |
1312 } | |
1313 | |
4944 | 1314 void Universe::print_heap_before_gc(outputStream* st, bool ignore_extended) { |
0 | 1315 st->print_cr("{Heap before GC invocations=%u (full %u):", |
1316 heap()->total_collections(), | |
1317 heap()->total_full_collections()); | |
4944 | 1318 if (!PrintHeapAtGCExtended || ignore_extended) { |
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1319 heap()->print_on(st); |
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1320 } else { |
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1321 heap()->print_extended_on(st); |
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1322 } |
0 | 1323 } |
1324 | |
4944 | 1325 void Universe::print_heap_after_gc(outputStream* st, bool ignore_extended) { |
0 | 1326 st->print_cr("Heap after GC invocations=%u (full %u):", |
1327 heap()->total_collections(), | |
1328 heap()->total_full_collections()); | |
4944 | 1329 if (!PrintHeapAtGCExtended || ignore_extended) { |
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1330 heap()->print_on(st); |
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1331 } else { |
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1332 heap()->print_extended_on(st); |
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1333 } |
0 | 1334 st->print_cr("}"); |
1335 } | |
1336 | |
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1337 void Universe::verify(VerifyOption option, const char* prefix, bool silent) { |
0 | 1338 // The use of _verify_in_progress is a temporary work around for |
1339 // 6320749. Don't bother with a creating a class to set and clear | |
1340 // it since it is only used in this method and the control flow is | |
1341 // straight forward. | |
1342 _verify_in_progress = true; | |
1343 | |
1344 COMPILER2_PRESENT( | |
1345 assert(!DerivedPointerTable::is_active(), | |
1346 "DPT should not be active during verification " | |
1347 "(of thread stacks below)"); | |
1348 ) | |
1349 | |
1350 ResourceMark rm; | |
1351 HandleMark hm; // Handles created during verification can be zapped | |
1352 _verify_count++; | |
1353 | |
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1354 if (!silent) gclog_or_tty->print(prefix); |
0 | 1355 if (!silent) gclog_or_tty->print("[Verifying "); |
1356 if (!silent) gclog_or_tty->print("threads "); | |
1357 Threads::verify(); | |
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1358 if (!silent) gclog_or_tty->print("heap "); |
6008 | 1359 heap()->verify(silent, option); |
0 | 1360 if (!silent) gclog_or_tty->print("syms "); |
1361 SymbolTable::verify(); | |
1362 if (!silent) gclog_or_tty->print("strs "); | |
1363 StringTable::verify(); | |
1364 { | |
1365 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); | |
1366 if (!silent) gclog_or_tty->print("zone "); | |
1367 CodeCache::verify(); | |
1368 } | |
1369 if (!silent) gclog_or_tty->print("dict "); | |
1370 SystemDictionary::verify(); | |
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1371 #ifndef PRODUCT |
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1372 if (!silent) gclog_or_tty->print("cldg "); |
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1373 ClassLoaderDataGraph::verify(); |
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1374 #endif |
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1375 if (!silent) gclog_or_tty->print("metaspace chunks "); |
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1376 MetaspaceAux::verify_free_chunks(); |
0 | 1377 if (!silent) gclog_or_tty->print("hand "); |
1378 JNIHandles::verify(); | |
1379 if (!silent) gclog_or_tty->print("C-heap "); | |
1380 os::check_heap(); | |
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1381 if (!silent) gclog_or_tty->print("code cache "); |
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1382 CodeCache::verify_oops(); |
0 | 1383 if (!silent) gclog_or_tty->print_cr("]"); |
1384 | |
1385 _verify_in_progress = false; | |
1386 } | |
1387 | |
1388 // Oop verification (see MacroAssembler::verify_oop) | |
1389 | |
1390 static uintptr_t _verify_oop_data[2] = {0, (uintptr_t)-1}; | |
1391 static uintptr_t _verify_klass_data[2] = {0, (uintptr_t)-1}; | |
1392 | |
1393 | |
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1394 #ifndef PRODUCT |
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1395 |
0 | 1396 static void calculate_verify_data(uintptr_t verify_data[2], |
1397 HeapWord* low_boundary, | |
1398 HeapWord* high_boundary) { | |
1399 assert(low_boundary < high_boundary, "bad interval"); | |
1400 | |
1401 // decide which low-order bits we require to be clear: | |
1402 size_t alignSize = MinObjAlignmentInBytes; | |
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1403 size_t min_object_size = CollectedHeap::min_fill_size(); |
0 | 1404 |
1405 // make an inclusive limit: | |
1406 uintptr_t max = (uintptr_t)high_boundary - min_object_size*wordSize; | |
1407 uintptr_t min = (uintptr_t)low_boundary; | |
1408 assert(min < max, "bad interval"); | |
1409 uintptr_t diff = max ^ min; | |
1410 | |
1411 // throw away enough low-order bits to make the diff vanish | |
1412 uintptr_t mask = (uintptr_t)(-1); | |
1413 while ((mask & diff) != 0) | |
1414 mask <<= 1; | |
1415 uintptr_t bits = (min & mask); | |
1416 assert(bits == (max & mask), "correct mask"); | |
1417 // check an intermediate value between min and max, just to make sure: | |
1418 assert(bits == ((min + (max-min)/2) & mask), "correct mask"); | |
1419 | |
1420 // require address alignment, too: | |
1421 mask |= (alignSize - 1); | |
1422 | |
1423 if (!(verify_data[0] == 0 && verify_data[1] == (uintptr_t)-1)) { | |
1424 assert(verify_data[0] == mask && verify_data[1] == bits, "mask stability"); | |
1425 } | |
1426 verify_data[0] = mask; | |
1427 verify_data[1] = bits; | |
1428 } | |
1429 | |
1430 // Oop verification (see MacroAssembler::verify_oop) | |
1431 | |
1432 uintptr_t Universe::verify_oop_mask() { | |
1433 MemRegion m = heap()->reserved_region(); | |
1434 calculate_verify_data(_verify_oop_data, | |
1435 m.start(), | |
1436 m.end()); | |
1437 return _verify_oop_data[0]; | |
1438 } | |
1439 | |
1440 | |
1441 | |
1442 uintptr_t Universe::verify_oop_bits() { | |
1443 verify_oop_mask(); | |
1444 return _verify_oop_data[1]; | |
1445 } | |
1446 | |
1447 uintptr_t Universe::verify_mark_mask() { | |
1448 return markOopDesc::lock_mask_in_place; | |
1449 } | |
1450 | |
1451 uintptr_t Universe::verify_mark_bits() { | |
1452 intptr_t mask = verify_mark_mask(); | |
1453 intptr_t bits = (intptr_t)markOopDesc::prototype(); | |
1454 assert((bits & ~mask) == 0, "no stray header bits"); | |
1455 return bits; | |
1456 } | |
1457 #endif // PRODUCT | |
1458 | |
1459 | |
1460 void Universe::compute_verify_oop_data() { | |
1461 verify_oop_mask(); | |
1462 verify_oop_bits(); | |
1463 verify_mark_mask(); | |
1464 verify_mark_bits(); | |
1465 } | |
1466 | |
1467 | |
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1468 void LatestMethodCache::init(Klass* k, Method* m) { |
0 | 1469 if (!UseSharedSpaces) { |
1470 _klass = k; | |
1471 } | |
1472 #ifndef PRODUCT | |
1473 else { | |
1474 // sharing initilization should have already set up _klass | |
1475 assert(_klass != NULL, "just checking"); | |
1476 } | |
1477 #endif | |
1478 | |
1479 _method_idnum = m->method_idnum(); | |
1480 assert(_method_idnum >= 0, "sanity check"); | |
1481 } | |
1482 | |
1483 | |
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1484 Method* LatestMethodCache::get_method() { |
11010 | 1485 if (klass() == NULL) return NULL; |
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1486 InstanceKlass* ik = InstanceKlass::cast(klass()); |
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1487 Method* m = ik->method_with_idnum(method_idnum()); |
0 | 1488 assert(m != NULL, "sanity check"); |
1489 return m; | |
1490 } | |
1491 | |
1492 | |
1493 #ifdef ASSERT | |
1494 // Release dummy object(s) at bottom of heap | |
1495 bool Universe::release_fullgc_alot_dummy() { | |
1496 MutexLocker ml(FullGCALot_lock); | |
1497 if (_fullgc_alot_dummy_array != NULL) { | |
1498 if (_fullgc_alot_dummy_next >= _fullgc_alot_dummy_array->length()) { | |
1499 // No more dummies to release, release entire array instead | |
1500 _fullgc_alot_dummy_array = NULL; | |
1501 return false; | |
1502 } | |
1503 if (!UseConcMarkSweepGC) { | |
1504 // Release dummy at bottom of old generation | |
1505 _fullgc_alot_dummy_array->obj_at_put(_fullgc_alot_dummy_next++, NULL); | |
1506 } | |
1507 // Release dummy at bottom of permanent generation | |
1508 _fullgc_alot_dummy_array->obj_at_put(_fullgc_alot_dummy_next++, NULL); | |
1509 } | |
1510 return true; | |
1511 } | |
1512 | |
1513 #endif // ASSERT |