Mercurial > jdk8-mips64-public > hotspot / file revision
src/share/vm/memory/universe.cpp@c760f78e0a53
src/share/vm/memory/universe.cpp
Wed, 01 Dec 2010 15:04:06 +0100
- author
- stefank
- date
- Wed, 01 Dec 2010 15:04:06 +0100
- changeset 2325
- c760f78e0a53
- parent 2314
- f95d63e2154a
- child 2403
- c04052fd6ae1
- permissions
- -rw-r--r--
7003125: precompiled.hpp is included when precompiled headers are not used
Summary: Added an ifndef DONT_USE_PRECOMPILED_HEADER to precompiled.hpp. Set up DONT_USE_PRECOMPILED_HEADER when compiling with Sun Studio or when the user specifies USE_PRECOMPILED_HEADER=0. Fixed broken include dependencies.
Reviewed-by: coleenp, kvn
1 /*
2 * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
25 #include "precompiled.hpp"
26 #include "classfile/classLoader.hpp"
27 #include "classfile/javaClasses.hpp"
28 #include "classfile/symbolTable.hpp"
29 #include "classfile/systemDictionary.hpp"
30 #include "classfile/vmSymbols.hpp"
31 #include "code/codeCache.hpp"
32 #include "code/dependencies.hpp"
33 #include "gc_interface/collectedHeap.inline.hpp"
34 #include "interpreter/interpreter.hpp"
35 #include "memory/cardTableModRefBS.hpp"
36 #include "memory/filemap.hpp"
37 #include "memory/gcLocker.inline.hpp"
38 #include "memory/genCollectedHeap.hpp"
39 #include "memory/genRemSet.hpp"
40 #include "memory/generation.hpp"
41 #include "memory/oopFactory.hpp"
42 #include "memory/permGen.hpp"
43 #include "memory/space.hpp"
44 #include "memory/universe.hpp"
45 #include "memory/universe.inline.hpp"
46 #include "oops/arrayKlassKlass.hpp"
47 #include "oops/compiledICHolderKlass.hpp"
48 #include "oops/constMethodKlass.hpp"
49 #include "oops/constantPoolKlass.hpp"
50 #include "oops/constantPoolOop.hpp"
51 #include "oops/cpCacheKlass.hpp"
52 #include "oops/cpCacheOop.hpp"
53 #include "oops/instanceKlass.hpp"
54 #include "oops/instanceKlassKlass.hpp"
55 #include "oops/instanceRefKlass.hpp"
56 #include "oops/klassKlass.hpp"
57 #include "oops/klassOop.hpp"
58 #include "oops/methodDataKlass.hpp"
59 #include "oops/methodKlass.hpp"
60 #include "oops/objArrayKlassKlass.hpp"
61 #include "oops/oop.inline.hpp"
62 #include "oops/symbolKlass.hpp"
63 #include "oops/typeArrayKlass.hpp"
64 #include "oops/typeArrayKlassKlass.hpp"
65 #include "prims/jvmtiRedefineClassesTrace.hpp"
66 #include "runtime/aprofiler.hpp"
67 #include "runtime/arguments.hpp"
68 #include "runtime/deoptimization.hpp"
69 #include "runtime/fprofiler.hpp"
70 #include "runtime/handles.inline.hpp"
71 #include "runtime/init.hpp"
72 #include "runtime/java.hpp"
73 #include "runtime/javaCalls.hpp"
74 #include "runtime/sharedRuntime.hpp"
75 #include "runtime/synchronizer.hpp"
76 #include "runtime/timer.hpp"
77 #include "runtime/vm_operations.hpp"
78 #include "services/memoryService.hpp"
79 #include "utilities/copy.hpp"
80 #include "utilities/events.hpp"
81 #include "utilities/hashtable.inline.hpp"
82 #include "utilities/preserveException.hpp"
83 #ifdef TARGET_OS_FAMILY_linux
84 # include "thread_linux.inline.hpp"
85 #endif
86 #ifdef TARGET_OS_FAMILY_solaris
87 # include "thread_solaris.inline.hpp"
88 #endif
89 #ifdef TARGET_OS_FAMILY_windows
90 # include "thread_windows.inline.hpp"
91 #endif
92 #ifndef SERIALGC
93 #include "gc_implementation/concurrentMarkSweep/cmsAdaptiveSizePolicy.hpp"
94 #include "gc_implementation/concurrentMarkSweep/cmsCollectorPolicy.hpp"
95 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp"
96 #include "gc_implementation/g1/g1CollectorPolicy.hpp"
97 #include "gc_implementation/parallelScavenge/parallelScavengeHeap.hpp"
98 #endif
100 // Known objects
101 klassOop Universe::_boolArrayKlassObj = NULL;
102 klassOop Universe::_byteArrayKlassObj = NULL;
103 klassOop Universe::_charArrayKlassObj = NULL;
104 klassOop Universe::_intArrayKlassObj = NULL;
105 klassOop Universe::_shortArrayKlassObj = NULL;
106 klassOop Universe::_longArrayKlassObj = NULL;
107 klassOop Universe::_singleArrayKlassObj = NULL;
108 klassOop Universe::_doubleArrayKlassObj = NULL;
109 klassOop Universe::_typeArrayKlassObjs[T_VOID+1] = { NULL /*, NULL...*/ };
110 klassOop Universe::_objectArrayKlassObj = NULL;
111 klassOop Universe::_symbolKlassObj = NULL;
112 klassOop Universe::_methodKlassObj = NULL;
113 klassOop Universe::_constMethodKlassObj = NULL;
114 klassOop Universe::_methodDataKlassObj = NULL;
115 klassOop Universe::_klassKlassObj = NULL;
116 klassOop Universe::_arrayKlassKlassObj = NULL;
117 klassOop Universe::_objArrayKlassKlassObj = NULL;
118 klassOop Universe::_typeArrayKlassKlassObj = NULL;
119 klassOop Universe::_instanceKlassKlassObj = NULL;
120 klassOop Universe::_constantPoolKlassObj = NULL;
121 klassOop Universe::_constantPoolCacheKlassObj = NULL;
122 klassOop Universe::_compiledICHolderKlassObj = NULL;
123 klassOop Universe::_systemObjArrayKlassObj = NULL;
124 oop Universe::_int_mirror = NULL;
125 oop Universe::_float_mirror = NULL;
126 oop Universe::_double_mirror = NULL;
127 oop Universe::_byte_mirror = NULL;
128 oop Universe::_bool_mirror = NULL;
129 oop Universe::_char_mirror = NULL;
130 oop Universe::_long_mirror = NULL;
131 oop Universe::_short_mirror = NULL;
132 oop Universe::_void_mirror = NULL;
133 oop Universe::_mirrors[T_VOID+1] = { NULL /*, NULL...*/ };
134 oop Universe::_main_thread_group = NULL;
135 oop Universe::_system_thread_group = NULL;
136 typeArrayOop Universe::_the_empty_byte_array = NULL;
137 typeArrayOop Universe::_the_empty_short_array = NULL;
138 typeArrayOop Universe::_the_empty_int_array = NULL;
139 objArrayOop Universe::_the_empty_system_obj_array = NULL;
140 objArrayOop Universe::_the_empty_class_klass_array = NULL;
141 objArrayOop Universe::_the_array_interfaces_array = NULL;
142 oop Universe::_the_null_string = NULL;
143 oop Universe::_the_min_jint_string = NULL;
144 LatestMethodOopCache* Universe::_finalizer_register_cache = NULL;
145 LatestMethodOopCache* Universe::_loader_addClass_cache = NULL;
146 ActiveMethodOopsCache* Universe::_reflect_invoke_cache = NULL;
147 oop Universe::_out_of_memory_error_java_heap = NULL;
148 oop Universe::_out_of_memory_error_perm_gen = NULL;
149 oop Universe::_out_of_memory_error_array_size = NULL;
150 oop Universe::_out_of_memory_error_gc_overhead_limit = NULL;
151 objArrayOop Universe::_preallocated_out_of_memory_error_array = NULL;
152 volatile jint Universe::_preallocated_out_of_memory_error_avail_count = 0;
153 bool Universe::_verify_in_progress = false;
154 oop Universe::_null_ptr_exception_instance = NULL;
155 oop Universe::_arithmetic_exception_instance = NULL;
156 oop Universe::_virtual_machine_error_instance = NULL;
157 oop Universe::_vm_exception = NULL;
158 oop Universe::_emptySymbol = NULL;
160 // These variables are guarded by FullGCALot_lock.
161 debug_only(objArrayOop Universe::_fullgc_alot_dummy_array = NULL;)
162 debug_only(int Universe::_fullgc_alot_dummy_next = 0;)
165 // Heap
166 int Universe::_verify_count = 0;
168 int Universe::_base_vtable_size = 0;
169 bool Universe::_bootstrapping = false;
170 bool Universe::_fully_initialized = false;
172 size_t Universe::_heap_capacity_at_last_gc;
173 size_t Universe::_heap_used_at_last_gc = 0;
175 CollectedHeap* Universe::_collectedHeap = NULL;
177 NarrowOopStruct Universe::_narrow_oop = { NULL, 0, true };
180 void Universe::basic_type_classes_do(void f(klassOop)) {
181 f(boolArrayKlassObj());
182 f(byteArrayKlassObj());
183 f(charArrayKlassObj());
184 f(intArrayKlassObj());
185 f(shortArrayKlassObj());
186 f(longArrayKlassObj());
187 f(singleArrayKlassObj());
188 f(doubleArrayKlassObj());
189 }
192 void Universe::system_classes_do(void f(klassOop)) {
193 f(symbolKlassObj());
194 f(methodKlassObj());
195 f(constMethodKlassObj());
196 f(methodDataKlassObj());
197 f(klassKlassObj());
198 f(arrayKlassKlassObj());
199 f(objArrayKlassKlassObj());
200 f(typeArrayKlassKlassObj());
201 f(instanceKlassKlassObj());
202 f(constantPoolKlassObj());
203 f(systemObjArrayKlassObj());
204 }
206 void Universe::oops_do(OopClosure* f, bool do_all) {
208 f->do_oop((oop*) &_int_mirror);
209 f->do_oop((oop*) &_float_mirror);
210 f->do_oop((oop*) &_double_mirror);
211 f->do_oop((oop*) &_byte_mirror);
212 f->do_oop((oop*) &_bool_mirror);
213 f->do_oop((oop*) &_char_mirror);
214 f->do_oop((oop*) &_long_mirror);
215 f->do_oop((oop*) &_short_mirror);
216 f->do_oop((oop*) &_void_mirror);
218 // It's important to iterate over these guys even if they are null,
219 // since that's how shared heaps are restored.
220 for (int i = T_BOOLEAN; i < T_VOID+1; i++) {
221 f->do_oop((oop*) &_mirrors[i]);
222 }
223 assert(_mirrors[0] == NULL && _mirrors[T_BOOLEAN - 1] == NULL, "checking");
225 // %%% Consider moving those "shared oops" over here with the others.
226 f->do_oop((oop*)&_boolArrayKlassObj);
227 f->do_oop((oop*)&_byteArrayKlassObj);
228 f->do_oop((oop*)&_charArrayKlassObj);
229 f->do_oop((oop*)&_intArrayKlassObj);
230 f->do_oop((oop*)&_shortArrayKlassObj);
231 f->do_oop((oop*)&_longArrayKlassObj);
232 f->do_oop((oop*)&_singleArrayKlassObj);
233 f->do_oop((oop*)&_doubleArrayKlassObj);
234 f->do_oop((oop*)&_objectArrayKlassObj);
235 {
236 for (int i = 0; i < T_VOID+1; i++) {
237 if (_typeArrayKlassObjs[i] != NULL) {
238 assert(i >= T_BOOLEAN, "checking");
239 f->do_oop((oop*)&_typeArrayKlassObjs[i]);
240 } else if (do_all) {
241 f->do_oop((oop*)&_typeArrayKlassObjs[i]);
242 }
243 }
244 }
245 f->do_oop((oop*)&_symbolKlassObj);
246 f->do_oop((oop*)&_methodKlassObj);
247 f->do_oop((oop*)&_constMethodKlassObj);
248 f->do_oop((oop*)&_methodDataKlassObj);
249 f->do_oop((oop*)&_klassKlassObj);
250 f->do_oop((oop*)&_arrayKlassKlassObj);
251 f->do_oop((oop*)&_objArrayKlassKlassObj);
252 f->do_oop((oop*)&_typeArrayKlassKlassObj);
253 f->do_oop((oop*)&_instanceKlassKlassObj);
254 f->do_oop((oop*)&_constantPoolKlassObj);
255 f->do_oop((oop*)&_constantPoolCacheKlassObj);
256 f->do_oop((oop*)&_compiledICHolderKlassObj);
257 f->do_oop((oop*)&_systemObjArrayKlassObj);
258 f->do_oop((oop*)&_the_empty_byte_array);
259 f->do_oop((oop*)&_the_empty_short_array);
260 f->do_oop((oop*)&_the_empty_int_array);
261 f->do_oop((oop*)&_the_empty_system_obj_array);
262 f->do_oop((oop*)&_the_empty_class_klass_array);
263 f->do_oop((oop*)&_the_array_interfaces_array);
264 f->do_oop((oop*)&_the_null_string);
265 f->do_oop((oop*)&_the_min_jint_string);
266 _finalizer_register_cache->oops_do(f);
267 _loader_addClass_cache->oops_do(f);
268 _reflect_invoke_cache->oops_do(f);
269 f->do_oop((oop*)&_out_of_memory_error_java_heap);
270 f->do_oop((oop*)&_out_of_memory_error_perm_gen);
271 f->do_oop((oop*)&_out_of_memory_error_array_size);
272 f->do_oop((oop*)&_out_of_memory_error_gc_overhead_limit);
273 if (_preallocated_out_of_memory_error_array != (oop)NULL) { // NULL when DumpSharedSpaces
274 f->do_oop((oop*)&_preallocated_out_of_memory_error_array);
275 }
276 f->do_oop((oop*)&_null_ptr_exception_instance);
277 f->do_oop((oop*)&_arithmetic_exception_instance);
278 f->do_oop((oop*)&_virtual_machine_error_instance);
279 f->do_oop((oop*)&_main_thread_group);
280 f->do_oop((oop*)&_system_thread_group);
281 f->do_oop((oop*)&_vm_exception);
282 f->do_oop((oop*)&_emptySymbol);
283 debug_only(f->do_oop((oop*)&_fullgc_alot_dummy_array);)
284 }
287 void Universe::check_alignment(uintx size, uintx alignment, const char* name) {
288 if (size < alignment || size % alignment != 0) {
289 ResourceMark rm;
290 stringStream st;
291 st.print("Size of %s (%ld bytes) must be aligned to %ld bytes", name, size, alignment);
292 char* error = st.as_string();
293 vm_exit_during_initialization(error);
294 }
295 }
298 void Universe::genesis(TRAPS) {
299 ResourceMark rm;
300 { FlagSetting fs(_bootstrapping, true);
302 { MutexLocker mc(Compile_lock);
304 // determine base vtable size; without that we cannot create the array klasses
305 compute_base_vtable_size();
307 if (!UseSharedSpaces) {
308 _klassKlassObj = klassKlass::create_klass(CHECK);
309 _arrayKlassKlassObj = arrayKlassKlass::create_klass(CHECK);
311 _objArrayKlassKlassObj = objArrayKlassKlass::create_klass(CHECK);
312 _instanceKlassKlassObj = instanceKlassKlass::create_klass(CHECK);
313 _typeArrayKlassKlassObj = typeArrayKlassKlass::create_klass(CHECK);
315 _symbolKlassObj = symbolKlass::create_klass(CHECK);
317 _emptySymbol = oopFactory::new_symbol("", CHECK);
319 _boolArrayKlassObj = typeArrayKlass::create_klass(T_BOOLEAN, sizeof(jboolean), CHECK);
320 _charArrayKlassObj = typeArrayKlass::create_klass(T_CHAR, sizeof(jchar), CHECK);
321 _singleArrayKlassObj = typeArrayKlass::create_klass(T_FLOAT, sizeof(jfloat), CHECK);
322 _doubleArrayKlassObj = typeArrayKlass::create_klass(T_DOUBLE, sizeof(jdouble), CHECK);
323 _byteArrayKlassObj = typeArrayKlass::create_klass(T_BYTE, sizeof(jbyte), CHECK);
324 _shortArrayKlassObj = typeArrayKlass::create_klass(T_SHORT, sizeof(jshort), CHECK);
325 _intArrayKlassObj = typeArrayKlass::create_klass(T_INT, sizeof(jint), CHECK);
326 _longArrayKlassObj = typeArrayKlass::create_klass(T_LONG, sizeof(jlong), CHECK);
328 _typeArrayKlassObjs[T_BOOLEAN] = _boolArrayKlassObj;
329 _typeArrayKlassObjs[T_CHAR] = _charArrayKlassObj;
330 _typeArrayKlassObjs[T_FLOAT] = _singleArrayKlassObj;
331 _typeArrayKlassObjs[T_DOUBLE] = _doubleArrayKlassObj;
332 _typeArrayKlassObjs[T_BYTE] = _byteArrayKlassObj;
333 _typeArrayKlassObjs[T_SHORT] = _shortArrayKlassObj;
334 _typeArrayKlassObjs[T_INT] = _intArrayKlassObj;
335 _typeArrayKlassObjs[T_LONG] = _longArrayKlassObj;
337 _methodKlassObj = methodKlass::create_klass(CHECK);
338 _constMethodKlassObj = constMethodKlass::create_klass(CHECK);
339 _methodDataKlassObj = methodDataKlass::create_klass(CHECK);
340 _constantPoolKlassObj = constantPoolKlass::create_klass(CHECK);
341 _constantPoolCacheKlassObj = constantPoolCacheKlass::create_klass(CHECK);
343 _compiledICHolderKlassObj = compiledICHolderKlass::create_klass(CHECK);
344 _systemObjArrayKlassObj = objArrayKlassKlass::cast(objArrayKlassKlassObj())->allocate_system_objArray_klass(CHECK);
346 _the_empty_byte_array = oopFactory::new_permanent_byteArray(0, CHECK);
347 _the_empty_short_array = oopFactory::new_permanent_shortArray(0, CHECK);
348 _the_empty_int_array = oopFactory::new_permanent_intArray(0, CHECK);
349 _the_empty_system_obj_array = oopFactory::new_system_objArray(0, CHECK);
351 _the_array_interfaces_array = oopFactory::new_system_objArray(2, CHECK);
352 _vm_exception = oopFactory::new_symbol("vm exception holder", CHECK);
353 } else {
354 FileMapInfo *mapinfo = FileMapInfo::current_info();
355 char* buffer = mapinfo->region_base(CompactingPermGenGen::md);
356 void** vtbl_list = (void**)buffer;
357 init_self_patching_vtbl_list(vtbl_list,
358 CompactingPermGenGen::vtbl_list_size);
359 }
360 }
362 vmSymbols::initialize(CHECK);
364 SystemDictionary::initialize(CHECK);
366 klassOop ok = SystemDictionary::Object_klass();
368 _the_null_string = StringTable::intern("null", CHECK);
369 _the_min_jint_string = StringTable::intern("-2147483648", CHECK);
371 if (UseSharedSpaces) {
372 // Verify shared interfaces array.
373 assert(_the_array_interfaces_array->obj_at(0) ==
374 SystemDictionary::Cloneable_klass(), "u3");
375 assert(_the_array_interfaces_array->obj_at(1) ==
376 SystemDictionary::Serializable_klass(), "u3");
378 // Verify element klass for system obj array klass
379 assert(objArrayKlass::cast(_systemObjArrayKlassObj)->element_klass() == ok, "u1");
380 assert(objArrayKlass::cast(_systemObjArrayKlassObj)->bottom_klass() == ok, "u2");
382 // Verify super class for the classes created above
383 assert(Klass::cast(boolArrayKlassObj() )->super() == ok, "u3");
384 assert(Klass::cast(charArrayKlassObj() )->super() == ok, "u3");
385 assert(Klass::cast(singleArrayKlassObj() )->super() == ok, "u3");
386 assert(Klass::cast(doubleArrayKlassObj() )->super() == ok, "u3");
387 assert(Klass::cast(byteArrayKlassObj() )->super() == ok, "u3");
388 assert(Klass::cast(shortArrayKlassObj() )->super() == ok, "u3");
389 assert(Klass::cast(intArrayKlassObj() )->super() == ok, "u3");
390 assert(Klass::cast(longArrayKlassObj() )->super() == ok, "u3");
391 assert(Klass::cast(constantPoolKlassObj() )->super() == ok, "u3");
392 assert(Klass::cast(systemObjArrayKlassObj())->super() == ok, "u3");
393 } else {
394 // Set up shared interfaces array. (Do this before supers are set up.)
395 _the_array_interfaces_array->obj_at_put(0, SystemDictionary::Cloneable_klass());
396 _the_array_interfaces_array->obj_at_put(1, SystemDictionary::Serializable_klass());
398 // Set element klass for system obj array klass
399 objArrayKlass::cast(_systemObjArrayKlassObj)->set_element_klass(ok);
400 objArrayKlass::cast(_systemObjArrayKlassObj)->set_bottom_klass(ok);
402 // Set super class for the classes created above
403 Klass::cast(boolArrayKlassObj() )->initialize_supers(ok, CHECK);
404 Klass::cast(charArrayKlassObj() )->initialize_supers(ok, CHECK);
405 Klass::cast(singleArrayKlassObj() )->initialize_supers(ok, CHECK);
406 Klass::cast(doubleArrayKlassObj() )->initialize_supers(ok, CHECK);
407 Klass::cast(byteArrayKlassObj() )->initialize_supers(ok, CHECK);
408 Klass::cast(shortArrayKlassObj() )->initialize_supers(ok, CHECK);
409 Klass::cast(intArrayKlassObj() )->initialize_supers(ok, CHECK);
410 Klass::cast(longArrayKlassObj() )->initialize_supers(ok, CHECK);
411 Klass::cast(constantPoolKlassObj() )->initialize_supers(ok, CHECK);
412 Klass::cast(systemObjArrayKlassObj())->initialize_supers(ok, CHECK);
413 Klass::cast(boolArrayKlassObj() )->set_super(ok);
414 Klass::cast(charArrayKlassObj() )->set_super(ok);
415 Klass::cast(singleArrayKlassObj() )->set_super(ok);
416 Klass::cast(doubleArrayKlassObj() )->set_super(ok);
417 Klass::cast(byteArrayKlassObj() )->set_super(ok);
418 Klass::cast(shortArrayKlassObj() )->set_super(ok);
419 Klass::cast(intArrayKlassObj() )->set_super(ok);
420 Klass::cast(longArrayKlassObj() )->set_super(ok);
421 Klass::cast(constantPoolKlassObj() )->set_super(ok);
422 Klass::cast(systemObjArrayKlassObj())->set_super(ok);
423 }
425 Klass::cast(boolArrayKlassObj() )->append_to_sibling_list();
426 Klass::cast(charArrayKlassObj() )->append_to_sibling_list();
427 Klass::cast(singleArrayKlassObj() )->append_to_sibling_list();
428 Klass::cast(doubleArrayKlassObj() )->append_to_sibling_list();
429 Klass::cast(byteArrayKlassObj() )->append_to_sibling_list();
430 Klass::cast(shortArrayKlassObj() )->append_to_sibling_list();
431 Klass::cast(intArrayKlassObj() )->append_to_sibling_list();
432 Klass::cast(longArrayKlassObj() )->append_to_sibling_list();
433 Klass::cast(constantPoolKlassObj() )->append_to_sibling_list();
434 Klass::cast(systemObjArrayKlassObj())->append_to_sibling_list();
435 } // end of core bootstrapping
437 // Initialize _objectArrayKlass after core bootstraping to make
438 // sure the super class is set up properly for _objectArrayKlass.
439 _objectArrayKlassObj = instanceKlass::
440 cast(SystemDictionary::Object_klass())->array_klass(1, CHECK);
441 // Add the class to the class hierarchy manually to make sure that
442 // its vtable is initialized after core bootstrapping is completed.
443 Klass::cast(_objectArrayKlassObj)->append_to_sibling_list();
445 // Compute is_jdk version flags.
446 // Only 1.3 or later has the java.lang.Shutdown class.
447 // Only 1.4 or later has the java.lang.CharSequence interface.
448 // Only 1.5 or later has the java.lang.management.MemoryUsage class.
449 if (JDK_Version::is_partially_initialized()) {
450 uint8_t jdk_version;
451 klassOop k = SystemDictionary::resolve_or_null(
452 vmSymbolHandles::java_lang_management_MemoryUsage(), THREAD);
453 CLEAR_PENDING_EXCEPTION; // ignore exceptions
454 if (k == NULL) {
455 k = SystemDictionary::resolve_or_null(
456 vmSymbolHandles::java_lang_CharSequence(), THREAD);
457 CLEAR_PENDING_EXCEPTION; // ignore exceptions
458 if (k == NULL) {
459 k = SystemDictionary::resolve_or_null(
460 vmSymbolHandles::java_lang_Shutdown(), THREAD);
461 CLEAR_PENDING_EXCEPTION; // ignore exceptions
462 if (k == NULL) {
463 jdk_version = 2;
464 } else {
465 jdk_version = 3;
466 }
467 } else {
468 jdk_version = 4;
469 }
470 } else {
471 jdk_version = 5;
472 }
473 JDK_Version::fully_initialize(jdk_version);
474 }
476 #ifdef ASSERT
477 if (FullGCALot) {
478 // Allocate an array of dummy objects.
479 // We'd like these to be at the bottom of the old generation,
480 // so that when we free one and then collect,
481 // (almost) the whole heap moves
482 // and we find out if we actually update all the oops correctly.
483 // But we can't allocate directly in the old generation,
484 // so we allocate wherever, and hope that the first collection
485 // moves these objects to the bottom of the old generation.
486 // We can allocate directly in the permanent generation, so we do.
487 int size;
488 if (UseConcMarkSweepGC) {
489 warning("Using +FullGCALot with concurrent mark sweep gc "
490 "will not force all objects to relocate");
491 size = FullGCALotDummies;
492 } else {
493 size = FullGCALotDummies * 2;
494 }
495 objArrayOop naked_array = oopFactory::new_system_objArray(size, CHECK);
496 objArrayHandle dummy_array(THREAD, naked_array);
497 int i = 0;
498 while (i < size) {
499 if (!UseConcMarkSweepGC) {
500 // Allocate dummy in old generation
501 oop dummy = instanceKlass::cast(SystemDictionary::Object_klass())->allocate_instance(CHECK);
502 dummy_array->obj_at_put(i++, dummy);
503 }
504 // Allocate dummy in permanent generation
505 oop dummy = instanceKlass::cast(SystemDictionary::Object_klass())->allocate_permanent_instance(CHECK);
506 dummy_array->obj_at_put(i++, dummy);
507 }
508 {
509 // Only modify the global variable inside the mutex.
510 // If we had a race to here, the other dummy_array instances
511 // and their elements just get dropped on the floor, which is fine.
512 MutexLocker ml(FullGCALot_lock);
513 if (_fullgc_alot_dummy_array == NULL) {
514 _fullgc_alot_dummy_array = dummy_array();
515 }
516 }
517 assert(i == _fullgc_alot_dummy_array->length(), "just checking");
518 }
519 #endif
520 }
523 static inline void add_vtable(void** list, int* n, Klass* o, int count) {
524 list[(*n)++] = *(void**)&o->vtbl_value();
525 guarantee((*n) <= count, "vtable list too small.");
526 }
529 void Universe::init_self_patching_vtbl_list(void** list, int count) {
530 int n = 0;
531 { klassKlass o; add_vtable(list, &n, &o, count); }
532 { arrayKlassKlass o; add_vtable(list, &n, &o, count); }
533 { objArrayKlassKlass o; add_vtable(list, &n, &o, count); }
534 { instanceKlassKlass o; add_vtable(list, &n, &o, count); }
535 { instanceKlass o; add_vtable(list, &n, &o, count); }
536 { instanceRefKlass o; add_vtable(list, &n, &o, count); }
537 { typeArrayKlassKlass o; add_vtable(list, &n, &o, count); }
538 { symbolKlass o; add_vtable(list, &n, &o, count); }
539 { typeArrayKlass o; add_vtable(list, &n, &o, count); }
540 { methodKlass o; add_vtable(list, &n, &o, count); }
541 { constMethodKlass o; add_vtable(list, &n, &o, count); }
542 { constantPoolKlass o; add_vtable(list, &n, &o, count); }
543 { constantPoolCacheKlass o; add_vtable(list, &n, &o, count); }
544 { objArrayKlass o; add_vtable(list, &n, &o, count); }
545 { methodDataKlass o; add_vtable(list, &n, &o, count); }
546 { compiledICHolderKlass o; add_vtable(list, &n, &o, count); }
547 }
550 class FixupMirrorClosure: public ObjectClosure {
551 public:
552 virtual void do_object(oop obj) {
553 if (obj->is_klass()) {
554 EXCEPTION_MARK;
555 KlassHandle k(THREAD, klassOop(obj));
556 // We will never reach the CATCH below since Exceptions::_throw will cause
557 // the VM to exit if an exception is thrown during initialization
558 java_lang_Class::create_mirror(k, CATCH);
559 // This call unconditionally creates a new mirror for k,
560 // and links in k's component_mirror field if k is an array.
561 // If k is an objArray, k's element type must already have
562 // a mirror. In other words, this closure must process
563 // the component type of an objArray k before it processes k.
564 // This works because the permgen iterator presents arrays
565 // and their component types in order of creation.
566 }
567 }
568 };
570 void Universe::initialize_basic_type_mirrors(TRAPS) {
571 if (UseSharedSpaces) {
572 assert(_int_mirror != NULL, "already loaded");
573 assert(_void_mirror == _mirrors[T_VOID], "consistently loaded");
574 } else {
576 assert(_int_mirror==NULL, "basic type mirrors already initialized");
577 _int_mirror =
578 java_lang_Class::create_basic_type_mirror("int", T_INT, CHECK);
579 _float_mirror =
580 java_lang_Class::create_basic_type_mirror("float", T_FLOAT, CHECK);
581 _double_mirror =
582 java_lang_Class::create_basic_type_mirror("double", T_DOUBLE, CHECK);
583 _byte_mirror =
584 java_lang_Class::create_basic_type_mirror("byte", T_BYTE, CHECK);
585 _bool_mirror =
586 java_lang_Class::create_basic_type_mirror("boolean",T_BOOLEAN, CHECK);
587 _char_mirror =
588 java_lang_Class::create_basic_type_mirror("char", T_CHAR, CHECK);
589 _long_mirror =
590 java_lang_Class::create_basic_type_mirror("long", T_LONG, CHECK);
591 _short_mirror =
592 java_lang_Class::create_basic_type_mirror("short", T_SHORT, CHECK);
593 _void_mirror =
594 java_lang_Class::create_basic_type_mirror("void", T_VOID, CHECK);
596 _mirrors[T_INT] = _int_mirror;
597 _mirrors[T_FLOAT] = _float_mirror;
598 _mirrors[T_DOUBLE] = _double_mirror;
599 _mirrors[T_BYTE] = _byte_mirror;
600 _mirrors[T_BOOLEAN] = _bool_mirror;
601 _mirrors[T_CHAR] = _char_mirror;
602 _mirrors[T_LONG] = _long_mirror;
603 _mirrors[T_SHORT] = _short_mirror;
604 _mirrors[T_VOID] = _void_mirror;
605 //_mirrors[T_OBJECT] = instanceKlass::cast(_object_klass)->java_mirror();
606 //_mirrors[T_ARRAY] = instanceKlass::cast(_object_klass)->java_mirror();
607 }
608 }
610 void Universe::fixup_mirrors(TRAPS) {
611 // Bootstrap problem: all classes gets a mirror (java.lang.Class instance) assigned eagerly,
612 // but we cannot do that for classes created before java.lang.Class is loaded. Here we simply
613 // walk over permanent objects created so far (mostly classes) and fixup their mirrors. Note
614 // that the number of objects allocated at this point is very small.
615 assert(SystemDictionary::Class_klass_loaded(), "java.lang.Class should be loaded");
616 FixupMirrorClosure blk;
617 Universe::heap()->permanent_object_iterate(&blk);
618 }
621 static bool has_run_finalizers_on_exit = false;
623 void Universe::run_finalizers_on_exit() {
624 if (has_run_finalizers_on_exit) return;
625 has_run_finalizers_on_exit = true;
627 // Called on VM exit. This ought to be run in a separate thread.
628 if (TraceReferenceGC) tty->print_cr("Callback to run finalizers on exit");
629 {
630 PRESERVE_EXCEPTION_MARK;
631 KlassHandle finalizer_klass(THREAD, SystemDictionary::Finalizer_klass());
632 JavaValue result(T_VOID);
633 JavaCalls::call_static(
634 &result,
635 finalizer_klass,
636 vmSymbolHandles::run_finalizers_on_exit_name(),
637 vmSymbolHandles::void_method_signature(),
638 THREAD
639 );
640 // Ignore any pending exceptions
641 CLEAR_PENDING_EXCEPTION;
642 }
643 }
646 // initialize_vtable could cause gc if
647 // 1) we specified true to initialize_vtable and
648 // 2) this ran after gc was enabled
649 // In case those ever change we use handles for oops
650 void Universe::reinitialize_vtable_of(KlassHandle k_h, TRAPS) {
651 // init vtable of k and all subclasses
652 Klass* ko = k_h()->klass_part();
653 klassVtable* vt = ko->vtable();
654 if (vt) vt->initialize_vtable(false, CHECK);
655 if (ko->oop_is_instance()) {
656 instanceKlass* ik = (instanceKlass*)ko;
657 for (KlassHandle s_h(THREAD, ik->subklass()); s_h() != NULL; s_h = (THREAD, s_h()->klass_part()->next_sibling())) {
658 reinitialize_vtable_of(s_h, CHECK);
659 }
660 }
661 }
664 void initialize_itable_for_klass(klassOop k, TRAPS) {
665 instanceKlass::cast(k)->itable()->initialize_itable(false, CHECK);
666 }
669 void Universe::reinitialize_itables(TRAPS) {
670 SystemDictionary::classes_do(initialize_itable_for_klass, CHECK);
672 }
675 bool Universe::on_page_boundary(void* addr) {
676 return ((uintptr_t) addr) % os::vm_page_size() == 0;
677 }
680 bool Universe::should_fill_in_stack_trace(Handle throwable) {
681 // never attempt to fill in the stack trace of preallocated errors that do not have
682 // backtrace. These errors are kept alive forever and may be "re-used" when all
683 // preallocated errors with backtrace have been consumed. Also need to avoid
684 // a potential loop which could happen if an out of memory occurs when attempting
685 // to allocate the backtrace.
686 return ((throwable() != Universe::_out_of_memory_error_java_heap) &&
687 (throwable() != Universe::_out_of_memory_error_perm_gen) &&
688 (throwable() != Universe::_out_of_memory_error_array_size) &&
689 (throwable() != Universe::_out_of_memory_error_gc_overhead_limit));
690 }
693 oop Universe::gen_out_of_memory_error(oop default_err) {
694 // generate an out of memory error:
695 // - if there is a preallocated error with backtrace available then return it wth
696 // a filled in stack trace.
697 // - if there are no preallocated errors with backtrace available then return
698 // an error without backtrace.
699 int next;
700 if (_preallocated_out_of_memory_error_avail_count > 0) {
701 next = (int)Atomic::add(-1, &_preallocated_out_of_memory_error_avail_count);
702 assert(next < (int)PreallocatedOutOfMemoryErrorCount, "avail count is corrupt");
703 } else {
704 next = -1;
705 }
706 if (next < 0) {
707 // all preallocated errors have been used.
708 // return default
709 return default_err;
710 } else {
711 // get the error object at the slot and set set it to NULL so that the
712 // array isn't keeping it alive anymore.
713 oop exc = preallocated_out_of_memory_errors()->obj_at(next);
714 assert(exc != NULL, "slot has been used already");
715 preallocated_out_of_memory_errors()->obj_at_put(next, NULL);
717 // use the message from the default error
718 oop msg = java_lang_Throwable::message(default_err);
719 assert(msg != NULL, "no message");
720 java_lang_Throwable::set_message(exc, msg);
722 // populate the stack trace and return it.
723 java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(exc);
724 return exc;
725 }
726 }
728 static intptr_t non_oop_bits = 0;
730 void* Universe::non_oop_word() {
731 // Neither the high bits nor the low bits of this value is allowed
732 // to look like (respectively) the high or low bits of a real oop.
733 //
734 // High and low are CPU-specific notions, but low always includes
735 // the low-order bit. Since oops are always aligned at least mod 4,
736 // setting the low-order bit will ensure that the low half of the
737 // word will never look like that of a real oop.
738 //
739 // Using the OS-supplied non-memory-address word (usually 0 or -1)
740 // will take care of the high bits, however many there are.
742 if (non_oop_bits == 0) {
743 non_oop_bits = (intptr_t)os::non_memory_address_word() | 1;
744 }
746 return (void*)non_oop_bits;
747 }
749 jint universe_init() {
750 assert(!Universe::_fully_initialized, "called after initialize_vtables");
751 guarantee(1 << LogHeapWordSize == sizeof(HeapWord),
752 "LogHeapWordSize is incorrect.");
753 guarantee(sizeof(oop) >= sizeof(HeapWord), "HeapWord larger than oop?");
754 guarantee(sizeof(oop) % sizeof(HeapWord) == 0,
755 "oop size is not not a multiple of HeapWord size");
756 TraceTime timer("Genesis", TraceStartupTime);
757 GC_locker::lock(); // do not allow gc during bootstrapping
758 JavaClasses::compute_hard_coded_offsets();
760 // Get map info from shared archive file.
761 if (DumpSharedSpaces)
762 UseSharedSpaces = false;
764 FileMapInfo* mapinfo = NULL;
765 if (UseSharedSpaces) {
766 mapinfo = NEW_C_HEAP_OBJ(FileMapInfo);
767 memset(mapinfo, 0, sizeof(FileMapInfo));
769 // Open the shared archive file, read and validate the header. If
770 // initialization files, shared spaces [UseSharedSpaces] are
771 // disabled and the file is closed.
773 if (mapinfo->initialize()) {
774 FileMapInfo::set_current_info(mapinfo);
775 } else {
776 assert(!mapinfo->is_open() && !UseSharedSpaces,
777 "archive file not closed or shared spaces not disabled.");
778 }
779 }
781 jint status = Universe::initialize_heap();
782 if (status != JNI_OK) {
783 return status;
784 }
786 // We have a heap so create the methodOop caches before
787 // CompactingPermGenGen::initialize_oops() tries to populate them.
788 Universe::_finalizer_register_cache = new LatestMethodOopCache();
789 Universe::_loader_addClass_cache = new LatestMethodOopCache();
790 Universe::_reflect_invoke_cache = new ActiveMethodOopsCache();
792 if (UseSharedSpaces) {
794 // Read the data structures supporting the shared spaces (shared
795 // system dictionary, symbol table, etc.). After that, access to
796 // the file (other than the mapped regions) is no longer needed, and
797 // the file is closed. Closing the file does not affect the
798 // currently mapped regions.
800 CompactingPermGenGen::initialize_oops();
801 mapinfo->close();
803 } else {
804 SymbolTable::create_table();
805 StringTable::create_table();
806 ClassLoader::create_package_info_table();
807 }
809 return JNI_OK;
810 }
812 // Choose the heap base address and oop encoding mode
813 // when compressed oops are used:
814 // Unscaled - Use 32-bits oops without encoding when
815 // NarrowOopHeapBaseMin + heap_size < 4Gb
816 // ZeroBased - Use zero based compressed oops with encoding when
817 // NarrowOopHeapBaseMin + heap_size < 32Gb
818 // HeapBased - Use compressed oops with heap base + encoding.
820 // 4Gb
821 static const uint64_t NarrowOopHeapMax = (uint64_t(max_juint) + 1);
822 // 32Gb
823 // OopEncodingHeapMax == NarrowOopHeapMax << LogMinObjAlignmentInBytes;
825 char* Universe::preferred_heap_base(size_t heap_size, NARROW_OOP_MODE mode) {
826 size_t base = 0;
827 #ifdef _LP64
828 if (UseCompressedOops) {
829 assert(mode == UnscaledNarrowOop ||
830 mode == ZeroBasedNarrowOop ||
831 mode == HeapBasedNarrowOop, "mode is invalid");
832 const size_t total_size = heap_size + HeapBaseMinAddress;
833 // Return specified base for the first request.
834 if (!FLAG_IS_DEFAULT(HeapBaseMinAddress) && (mode == UnscaledNarrowOop)) {
835 base = HeapBaseMinAddress;
836 } else if (total_size <= OopEncodingHeapMax && (mode != HeapBasedNarrowOop)) {
837 if (total_size <= NarrowOopHeapMax && (mode == UnscaledNarrowOop) &&
838 (Universe::narrow_oop_shift() == 0)) {
839 // Use 32-bits oops without encoding and
840 // place heap's top on the 4Gb boundary
841 base = (NarrowOopHeapMax - heap_size);
842 } else {
843 // Can't reserve with NarrowOopShift == 0
844 Universe::set_narrow_oop_shift(LogMinObjAlignmentInBytes);
845 if (mode == UnscaledNarrowOop ||
846 mode == ZeroBasedNarrowOop && total_size <= NarrowOopHeapMax) {
847 // Use zero based compressed oops with encoding and
848 // place heap's top on the 32Gb boundary in case
849 // total_size > 4Gb or failed to reserve below 4Gb.
850 base = (OopEncodingHeapMax - heap_size);
851 }
852 }
853 } else {
854 // Can't reserve below 32Gb.
855 Universe::set_narrow_oop_shift(LogMinObjAlignmentInBytes);
856 }
857 // Set narrow_oop_base and narrow_oop_use_implicit_null_checks
858 // used in ReservedHeapSpace() constructors.
859 // The final values will be set in initialize_heap() below.
860 if (base != 0 && (base + heap_size) <= OopEncodingHeapMax) {
861 // Use zero based compressed oops
862 Universe::set_narrow_oop_base(NULL);
863 // Don't need guard page for implicit checks in indexed
864 // addressing mode with zero based Compressed Oops.
865 Universe::set_narrow_oop_use_implicit_null_checks(true);
866 } else {
867 // Set to a non-NULL value so the ReservedSpace ctor computes
868 // the correct no-access prefix.
869 // The final value will be set in initialize_heap() below.
870 Universe::set_narrow_oop_base((address)NarrowOopHeapMax);
871 #ifdef _WIN64
872 if (UseLargePages) {
873 // Cannot allocate guard pages for implicit checks in indexed
874 // addressing mode when large pages are specified on windows.
875 Universe::set_narrow_oop_use_implicit_null_checks(false);
876 }
877 #endif // _WIN64
878 }
879 }
880 #endif
881 return (char*)base; // also return NULL (don't care) for 32-bit VM
882 }
884 jint Universe::initialize_heap() {
886 if (UseParallelGC) {
887 #ifndef SERIALGC
888 Universe::_collectedHeap = new ParallelScavengeHeap();
889 #else // SERIALGC
890 fatal("UseParallelGC not supported in java kernel vm.");
891 #endif // SERIALGC
893 } else if (UseG1GC) {
894 #ifndef SERIALGC
895 G1CollectorPolicy* g1p = new G1CollectorPolicy_BestRegionsFirst();
896 G1CollectedHeap* g1h = new G1CollectedHeap(g1p);
897 Universe::_collectedHeap = g1h;
898 #else // SERIALGC
899 fatal("UseG1GC not supported in java kernel vm.");
900 #endif // SERIALGC
902 } else {
903 GenCollectorPolicy *gc_policy;
905 if (UseSerialGC) {
906 gc_policy = new MarkSweepPolicy();
907 } else if (UseConcMarkSweepGC) {
908 #ifndef SERIALGC
909 if (UseAdaptiveSizePolicy) {
910 gc_policy = new ASConcurrentMarkSweepPolicy();
911 } else {
912 gc_policy = new ConcurrentMarkSweepPolicy();
913 }
914 #else // SERIALGC
915 fatal("UseConcMarkSweepGC not supported in java kernel vm.");
916 #endif // SERIALGC
917 } else { // default old generation
918 gc_policy = new MarkSweepPolicy();
919 }
921 Universe::_collectedHeap = new GenCollectedHeap(gc_policy);
922 }
924 jint status = Universe::heap()->initialize();
925 if (status != JNI_OK) {
926 return status;
927 }
929 #ifdef _LP64
930 if (UseCompressedOops) {
931 // Subtract a page because something can get allocated at heap base.
932 // This also makes implicit null checking work, because the
933 // memory+1 page below heap_base needs to cause a signal.
934 // See needs_explicit_null_check.
935 // Only set the heap base for compressed oops because it indicates
936 // compressed oops for pstack code.
937 if (PrintCompressedOopsMode) {
938 tty->cr();
939 tty->print("heap address: " PTR_FORMAT ", size: " SIZE_FORMAT " MB",
940 Universe::heap()->base(), Universe::heap()->reserved_region().byte_size()/M);
941 }
942 if ((uint64_t)Universe::heap()->reserved_region().end() > OopEncodingHeapMax) {
943 // Can't reserve heap below 32Gb.
944 Universe::set_narrow_oop_base(Universe::heap()->base() - os::vm_page_size());
945 Universe::set_narrow_oop_shift(LogMinObjAlignmentInBytes);
946 if (PrintCompressedOopsMode) {
947 tty->print(", Compressed Oops with base: "PTR_FORMAT, Universe::narrow_oop_base());
948 }
949 } else {
950 Universe::set_narrow_oop_base(0);
951 if (PrintCompressedOopsMode) {
952 tty->print(", zero based Compressed Oops");
953 }
954 #ifdef _WIN64
955 if (!Universe::narrow_oop_use_implicit_null_checks()) {
956 // Don't need guard page for implicit checks in indexed addressing
957 // mode with zero based Compressed Oops.
958 Universe::set_narrow_oop_use_implicit_null_checks(true);
959 }
960 #endif // _WIN64
961 if((uint64_t)Universe::heap()->reserved_region().end() > NarrowOopHeapMax) {
962 // Can't reserve heap below 4Gb.
963 Universe::set_narrow_oop_shift(LogMinObjAlignmentInBytes);
964 } else {
965 Universe::set_narrow_oop_shift(0);
966 if (PrintCompressedOopsMode) {
967 tty->print(", 32-bits Oops");
968 }
969 }
970 }
971 if (PrintCompressedOopsMode) {
972 tty->cr();
973 tty->cr();
974 }
975 }
976 assert(Universe::narrow_oop_base() == (Universe::heap()->base() - os::vm_page_size()) ||
977 Universe::narrow_oop_base() == NULL, "invalid value");
978 assert(Universe::narrow_oop_shift() == LogMinObjAlignmentInBytes ||
979 Universe::narrow_oop_shift() == 0, "invalid value");
980 #endif
982 // We will never reach the CATCH below since Exceptions::_throw will cause
983 // the VM to exit if an exception is thrown during initialization
985 if (UseTLAB) {
986 assert(Universe::heap()->supports_tlab_allocation(),
987 "Should support thread-local allocation buffers");
988 ThreadLocalAllocBuffer::startup_initialization();
989 }
990 return JNI_OK;
991 }
993 // It's the caller's repsonsibility to ensure glitch-freedom
994 // (if required).
995 void Universe::update_heap_info_at_gc() {
996 _heap_capacity_at_last_gc = heap()->capacity();
997 _heap_used_at_last_gc = heap()->used();
998 }
1002 void universe2_init() {
1003 EXCEPTION_MARK;
1004 Universe::genesis(CATCH);
1005 // Although we'd like to verify here that the state of the heap
1006 // is good, we can't because the main thread has not yet added
1007 // itself to the threads list (so, using current interfaces
1008 // we can't "fill" its TLAB), unless TLABs are disabled.
1009 if (VerifyBeforeGC && !UseTLAB &&
1010 Universe::heap()->total_collections() >= VerifyGCStartAt) {
1011 Universe::heap()->prepare_for_verify();
1012 Universe::verify(); // make sure we're starting with a clean slate
1013 }
1014 }
1017 // This function is defined in JVM.cpp
1018 extern void initialize_converter_functions();
1020 bool universe_post_init() {
1021 assert(!is_init_completed(), "Error: initialization not yet completed!");
1022 Universe::_fully_initialized = true;
1023 EXCEPTION_MARK;
1024 { ResourceMark rm;
1025 Interpreter::initialize(); // needed for interpreter entry points
1026 if (!UseSharedSpaces) {
1027 KlassHandle ok_h(THREAD, SystemDictionary::Object_klass());
1028 Universe::reinitialize_vtable_of(ok_h, CHECK_false);
1029 Universe::reinitialize_itables(CHECK_false);
1030 }
1031 }
1033 klassOop k;
1034 instanceKlassHandle k_h;
1035 if (!UseSharedSpaces) {
1036 // Setup preallocated empty java.lang.Class array
1037 Universe::_the_empty_class_klass_array = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_false);
1038 // Setup preallocated OutOfMemoryError errors
1039 k = SystemDictionary::resolve_or_fail(vmSymbolHandles::java_lang_OutOfMemoryError(), true, CHECK_false);
1040 k_h = instanceKlassHandle(THREAD, k);
1041 Universe::_out_of_memory_error_java_heap = k_h->allocate_permanent_instance(CHECK_false);
1042 Universe::_out_of_memory_error_perm_gen = k_h->allocate_permanent_instance(CHECK_false);
1043 Universe::_out_of_memory_error_array_size = k_h->allocate_permanent_instance(CHECK_false);
1044 Universe::_out_of_memory_error_gc_overhead_limit =
1045 k_h->allocate_permanent_instance(CHECK_false);
1047 // Setup preallocated NullPointerException
1048 // (this is currently used for a cheap & dirty solution in compiler exception handling)
1049 k = SystemDictionary::resolve_or_fail(vmSymbolHandles::java_lang_NullPointerException(), true, CHECK_false);
1050 Universe::_null_ptr_exception_instance = instanceKlass::cast(k)->allocate_permanent_instance(CHECK_false);
1051 // Setup preallocated ArithmeticException
1052 // (this is currently used for a cheap & dirty solution in compiler exception handling)
1053 k = SystemDictionary::resolve_or_fail(vmSymbolHandles::java_lang_ArithmeticException(), true, CHECK_false);
1054 Universe::_arithmetic_exception_instance = instanceKlass::cast(k)->allocate_permanent_instance(CHECK_false);
1055 // Virtual Machine Error for when we get into a situation we can't resolve
1056 k = SystemDictionary::resolve_or_fail(
1057 vmSymbolHandles::java_lang_VirtualMachineError(), true, CHECK_false);
1058 bool linked = instanceKlass::cast(k)->link_class_or_fail(CHECK_false);
1059 if (!linked) {
1060 tty->print_cr("Unable to link/verify VirtualMachineError class");
1061 return false; // initialization failed
1062 }
1063 Universe::_virtual_machine_error_instance =
1064 instanceKlass::cast(k)->allocate_permanent_instance(CHECK_false);
1065 }
1066 if (!DumpSharedSpaces) {
1067 // These are the only Java fields that are currently set during shared space dumping.
1068 // We prefer to not handle this generally, so we always reinitialize these detail messages.
1069 Handle msg = java_lang_String::create_from_str("Java heap space", CHECK_false);
1070 java_lang_Throwable::set_message(Universe::_out_of_memory_error_java_heap, msg());
1072 msg = java_lang_String::create_from_str("PermGen space", CHECK_false);
1073 java_lang_Throwable::set_message(Universe::_out_of_memory_error_perm_gen, msg());
1075 msg = java_lang_String::create_from_str("Requested array size exceeds VM limit", CHECK_false);
1076 java_lang_Throwable::set_message(Universe::_out_of_memory_error_array_size, msg());
1078 msg = java_lang_String::create_from_str("GC overhead limit exceeded", CHECK_false);
1079 java_lang_Throwable::set_message(Universe::_out_of_memory_error_gc_overhead_limit, msg());
1081 msg = java_lang_String::create_from_str("/ by zero", CHECK_false);
1082 java_lang_Throwable::set_message(Universe::_arithmetic_exception_instance, msg());
1084 // Setup the array of errors that have preallocated backtrace
1085 k = Universe::_out_of_memory_error_java_heap->klass();
1086 assert(k->klass_part()->name() == vmSymbols::java_lang_OutOfMemoryError(), "should be out of memory error");
1087 k_h = instanceKlassHandle(THREAD, k);
1089 int len = (StackTraceInThrowable) ? (int)PreallocatedOutOfMemoryErrorCount : 0;
1090 Universe::_preallocated_out_of_memory_error_array = oopFactory::new_objArray(k_h(), len, CHECK_false);
1091 for (int i=0; i<len; i++) {
1092 oop err = k_h->allocate_permanent_instance(CHECK_false);
1093 Handle err_h = Handle(THREAD, err);
1094 java_lang_Throwable::allocate_backtrace(err_h, CHECK_false);
1095 Universe::preallocated_out_of_memory_errors()->obj_at_put(i, err_h());
1096 }
1097 Universe::_preallocated_out_of_memory_error_avail_count = (jint)len;
1098 }
1101 // Setup static method for registering finalizers
1102 // The finalizer klass must be linked before looking up the method, in
1103 // case it needs to get rewritten.
1104 instanceKlass::cast(SystemDictionary::Finalizer_klass())->link_class(CHECK_false);
1105 methodOop m = instanceKlass::cast(SystemDictionary::Finalizer_klass())->find_method(
1106 vmSymbols::register_method_name(),
1107 vmSymbols::register_method_signature());
1108 if (m == NULL || !m->is_static()) {
1109 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodException(),
1110 "java.lang.ref.Finalizer.register", false);
1111 }
1112 Universe::_finalizer_register_cache->init(
1113 SystemDictionary::Finalizer_klass(), m, CHECK_false);
1115 // Resolve on first use and initialize class.
1116 // Note: No race-condition here, since a resolve will always return the same result
1118 // Setup method for security checks
1119 k = SystemDictionary::resolve_or_fail(vmSymbolHandles::java_lang_reflect_Method(), true, CHECK_false);
1120 k_h = instanceKlassHandle(THREAD, k);
1121 k_h->link_class(CHECK_false);
1122 m = k_h->find_method(vmSymbols::invoke_name(), vmSymbols::object_object_array_object_signature());
1123 if (m == NULL || m->is_static()) {
1124 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodException(),
1125 "java.lang.reflect.Method.invoke", false);
1126 }
1127 Universe::_reflect_invoke_cache->init(k_h(), m, CHECK_false);
1129 // Setup method for registering loaded classes in class loader vector
1130 instanceKlass::cast(SystemDictionary::ClassLoader_klass())->link_class(CHECK_false);
1131 m = instanceKlass::cast(SystemDictionary::ClassLoader_klass())->find_method(vmSymbols::addClass_name(), vmSymbols::class_void_signature());
1132 if (m == NULL || m->is_static()) {
1133 THROW_MSG_(vmSymbols::java_lang_NoSuchMethodException(),
1134 "java.lang.ClassLoader.addClass", false);
1135 }
1136 Universe::_loader_addClass_cache->init(
1137 SystemDictionary::ClassLoader_klass(), m, CHECK_false);
1139 // The folowing is initializing converter functions for serialization in
1140 // JVM.cpp. If we clean up the StrictMath code above we may want to find
1141 // a better solution for this as well.
1142 initialize_converter_functions();
1144 // This needs to be done before the first scavenge/gc, since
1145 // it's an input to soft ref clearing policy.
1146 {
1147 MutexLocker x(Heap_lock);
1148 Universe::update_heap_info_at_gc();
1149 }
1151 // ("weak") refs processing infrastructure initialization
1152 Universe::heap()->post_initialize();
1154 GC_locker::unlock(); // allow gc after bootstrapping
1156 MemoryService::set_universe_heap(Universe::_collectedHeap);
1157 return true;
1158 }
1161 void Universe::compute_base_vtable_size() {
1162 _base_vtable_size = ClassLoader::compute_Object_vtable();
1163 }
1166 // %%% The Universe::flush_foo methods belong in CodeCache.
1168 // Flushes compiled methods dependent on dependee.
1169 void Universe::flush_dependents_on(instanceKlassHandle dependee) {
1170 assert_lock_strong(Compile_lock);
1172 if (CodeCache::number_of_nmethods_with_dependencies() == 0) return;
1174 // CodeCache can only be updated by a thread_in_VM and they will all be
1175 // stopped dring the safepoint so CodeCache will be safe to update without
1176 // holding the CodeCache_lock.
1178 DepChange changes(dependee);
1180 // Compute the dependent nmethods
1181 if (CodeCache::mark_for_deoptimization(changes) > 0) {
1182 // At least one nmethod has been marked for deoptimization
1183 VM_Deoptimize op;
1184 VMThread::execute(&op);
1185 }
1186 }
1188 #ifdef HOTSWAP
1189 // Flushes compiled methods dependent on dependee in the evolutionary sense
1190 void Universe::flush_evol_dependents_on(instanceKlassHandle ev_k_h) {
1191 // --- Compile_lock is not held. However we are at a safepoint.
1192 assert_locked_or_safepoint(Compile_lock);
1193 if (CodeCache::number_of_nmethods_with_dependencies() == 0) return;
1195 // CodeCache can only be updated by a thread_in_VM and they will all be
1196 // stopped dring the safepoint so CodeCache will be safe to update without
1197 // holding the CodeCache_lock.
1199 // Compute the dependent nmethods
1200 if (CodeCache::mark_for_evol_deoptimization(ev_k_h) > 0) {
1201 // At least one nmethod has been marked for deoptimization
1203 // All this already happens inside a VM_Operation, so we'll do all the work here.
1204 // Stuff copied from VM_Deoptimize and modified slightly.
1206 // We do not want any GCs to happen while we are in the middle of this VM operation
1207 ResourceMark rm;
1208 DeoptimizationMarker dm;
1210 // Deoptimize all activations depending on marked nmethods
1211 Deoptimization::deoptimize_dependents();
1213 // Make the dependent methods not entrant (in VM_Deoptimize they are made zombies)
1214 CodeCache::make_marked_nmethods_not_entrant();
1215 }
1216 }
1217 #endif // HOTSWAP
1220 // Flushes compiled methods dependent on dependee
1221 void Universe::flush_dependents_on_method(methodHandle m_h) {
1222 // --- Compile_lock is not held. However we are at a safepoint.
1223 assert_locked_or_safepoint(Compile_lock);
1225 // CodeCache can only be updated by a thread_in_VM and they will all be
1226 // stopped dring the safepoint so CodeCache will be safe to update without
1227 // holding the CodeCache_lock.
1229 // Compute the dependent nmethods
1230 if (CodeCache::mark_for_deoptimization(m_h()) > 0) {
1231 // At least one nmethod has been marked for deoptimization
1233 // All this already happens inside a VM_Operation, so we'll do all the work here.
1234 // Stuff copied from VM_Deoptimize and modified slightly.
1236 // We do not want any GCs to happen while we are in the middle of this VM operation
1237 ResourceMark rm;
1238 DeoptimizationMarker dm;
1240 // Deoptimize all activations depending on marked nmethods
1241 Deoptimization::deoptimize_dependents();
1243 // Make the dependent methods not entrant (in VM_Deoptimize they are made zombies)
1244 CodeCache::make_marked_nmethods_not_entrant();
1245 }
1246 }
1248 void Universe::print() { print_on(gclog_or_tty); }
1250 void Universe::print_on(outputStream* st) {
1251 st->print_cr("Heap");
1252 heap()->print_on(st);
1253 }
1255 void Universe::print_heap_at_SIGBREAK() {
1256 if (PrintHeapAtSIGBREAK) {
1257 MutexLocker hl(Heap_lock);
1258 print_on(tty);
1259 tty->cr();
1260 tty->flush();
1261 }
1262 }
1264 void Universe::print_heap_before_gc(outputStream* st) {
1265 st->print_cr("{Heap before GC invocations=%u (full %u):",
1266 heap()->total_collections(),
1267 heap()->total_full_collections());
1268 heap()->print_on(st);
1269 }
1271 void Universe::print_heap_after_gc(outputStream* st) {
1272 st->print_cr("Heap after GC invocations=%u (full %u):",
1273 heap()->total_collections(),
1274 heap()->total_full_collections());
1275 heap()->print_on(st);
1276 st->print_cr("}");
1277 }
1279 void Universe::verify(bool allow_dirty, bool silent, bool option) {
1280 if (SharedSkipVerify) {
1281 return;
1282 }
1284 // The use of _verify_in_progress is a temporary work around for
1285 // 6320749. Don't bother with a creating a class to set and clear
1286 // it since it is only used in this method and the control flow is
1287 // straight forward.
1288 _verify_in_progress = true;
1290 COMPILER2_PRESENT(
1291 assert(!DerivedPointerTable::is_active(),
1292 "DPT should not be active during verification "
1293 "(of thread stacks below)");
1294 )
1296 ResourceMark rm;
1297 HandleMark hm; // Handles created during verification can be zapped
1298 _verify_count++;
1300 if (!silent) gclog_or_tty->print("[Verifying ");
1301 if (!silent) gclog_or_tty->print("threads ");
1302 Threads::verify();
1303 heap()->verify(allow_dirty, silent, option);
1305 if (!silent) gclog_or_tty->print("syms ");
1306 SymbolTable::verify();
1307 if (!silent) gclog_or_tty->print("strs ");
1308 StringTable::verify();
1309 {
1310 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1311 if (!silent) gclog_or_tty->print("zone ");
1312 CodeCache::verify();
1313 }
1314 if (!silent) gclog_or_tty->print("dict ");
1315 SystemDictionary::verify();
1316 if (!silent) gclog_or_tty->print("hand ");
1317 JNIHandles::verify();
1318 if (!silent) gclog_or_tty->print("C-heap ");
1319 os::check_heap();
1320 if (!silent) gclog_or_tty->print_cr("]");
1322 _verify_in_progress = false;
1323 }
1325 // Oop verification (see MacroAssembler::verify_oop)
1327 static uintptr_t _verify_oop_data[2] = {0, (uintptr_t)-1};
1328 static uintptr_t _verify_klass_data[2] = {0, (uintptr_t)-1};
1331 static void calculate_verify_data(uintptr_t verify_data[2],
1332 HeapWord* low_boundary,
1333 HeapWord* high_boundary) {
1334 assert(low_boundary < high_boundary, "bad interval");
1336 // decide which low-order bits we require to be clear:
1337 size_t alignSize = MinObjAlignmentInBytes;
1338 size_t min_object_size = CollectedHeap::min_fill_size();
1340 // make an inclusive limit:
1341 uintptr_t max = (uintptr_t)high_boundary - min_object_size*wordSize;
1342 uintptr_t min = (uintptr_t)low_boundary;
1343 assert(min < max, "bad interval");
1344 uintptr_t diff = max ^ min;
1346 // throw away enough low-order bits to make the diff vanish
1347 uintptr_t mask = (uintptr_t)(-1);
1348 while ((mask & diff) != 0)
1349 mask <<= 1;
1350 uintptr_t bits = (min & mask);
1351 assert(bits == (max & mask), "correct mask");
1352 // check an intermediate value between min and max, just to make sure:
1353 assert(bits == ((min + (max-min)/2) & mask), "correct mask");
1355 // require address alignment, too:
1356 mask |= (alignSize - 1);
1358 if (!(verify_data[0] == 0 && verify_data[1] == (uintptr_t)-1)) {
1359 assert(verify_data[0] == mask && verify_data[1] == bits, "mask stability");
1360 }
1361 verify_data[0] = mask;
1362 verify_data[1] = bits;
1363 }
1366 // Oop verification (see MacroAssembler::verify_oop)
1367 #ifndef PRODUCT
1369 uintptr_t Universe::verify_oop_mask() {
1370 MemRegion m = heap()->reserved_region();
1371 calculate_verify_data(_verify_oop_data,
1372 m.start(),
1373 m.end());
1374 return _verify_oop_data[0];
1375 }
1379 uintptr_t Universe::verify_oop_bits() {
1380 verify_oop_mask();
1381 return _verify_oop_data[1];
1382 }
1385 uintptr_t Universe::verify_klass_mask() {
1386 /* $$$
1387 // A klass can never live in the new space. Since the new and old
1388 // spaces can change size, we must settle for bounds-checking against
1389 // the bottom of the world, plus the smallest possible new and old
1390 // space sizes that may arise during execution.
1391 size_t min_new_size = Universe::new_size(); // in bytes
1392 size_t min_old_size = Universe::old_size(); // in bytes
1393 calculate_verify_data(_verify_klass_data,
1394 (HeapWord*)((uintptr_t)_new_gen->low_boundary + min_new_size + min_old_size),
1395 _perm_gen->high_boundary);
1396 */
1397 // Why doesn't the above just say that klass's always live in the perm
1398 // gen? I'll see if that seems to work...
1399 MemRegion permanent_reserved;
1400 switch (Universe::heap()->kind()) {
1401 default:
1402 // ???: What if a CollectedHeap doesn't have a permanent generation?
1403 ShouldNotReachHere();
1404 break;
1405 case CollectedHeap::GenCollectedHeap:
1406 case CollectedHeap::G1CollectedHeap: {
1407 SharedHeap* sh = (SharedHeap*) Universe::heap();
1408 permanent_reserved = sh->perm_gen()->reserved();
1409 break;
1410 }
1411 #ifndef SERIALGC
1412 case CollectedHeap::ParallelScavengeHeap: {
1413 ParallelScavengeHeap* psh = (ParallelScavengeHeap*) Universe::heap();
1414 permanent_reserved = psh->perm_gen()->reserved();
1415 break;
1416 }
1417 #endif // SERIALGC
1418 }
1419 calculate_verify_data(_verify_klass_data,
1420 permanent_reserved.start(),
1421 permanent_reserved.end());
1423 return _verify_klass_data[0];
1424 }
1428 uintptr_t Universe::verify_klass_bits() {
1429 verify_klass_mask();
1430 return _verify_klass_data[1];
1431 }
1434 uintptr_t Universe::verify_mark_mask() {
1435 return markOopDesc::lock_mask_in_place;
1436 }
1440 uintptr_t Universe::verify_mark_bits() {
1441 intptr_t mask = verify_mark_mask();
1442 intptr_t bits = (intptr_t)markOopDesc::prototype();
1443 assert((bits & ~mask) == 0, "no stray header bits");
1444 return bits;
1445 }
1446 #endif // PRODUCT
1449 void Universe::compute_verify_oop_data() {
1450 verify_oop_mask();
1451 verify_oop_bits();
1452 verify_mark_mask();
1453 verify_mark_bits();
1454 verify_klass_mask();
1455 verify_klass_bits();
1456 }
1459 void CommonMethodOopCache::init(klassOop k, methodOop m, TRAPS) {
1460 if (!UseSharedSpaces) {
1461 _klass = k;
1462 }
1463 #ifndef PRODUCT
1464 else {
1465 // sharing initilization should have already set up _klass
1466 assert(_klass != NULL, "just checking");
1467 }
1468 #endif
1470 _method_idnum = m->method_idnum();
1471 assert(_method_idnum >= 0, "sanity check");
1472 }
1475 ActiveMethodOopsCache::~ActiveMethodOopsCache() {
1476 if (_prev_methods != NULL) {
1477 for (int i = _prev_methods->length() - 1; i >= 0; i--) {
1478 jweak method_ref = _prev_methods->at(i);
1479 if (method_ref != NULL) {
1480 JNIHandles::destroy_weak_global(method_ref);
1481 }
1482 }
1483 delete _prev_methods;
1484 _prev_methods = NULL;
1485 }
1486 }
1489 void ActiveMethodOopsCache::add_previous_version(const methodOop method) {
1490 assert(Thread::current()->is_VM_thread(),
1491 "only VMThread can add previous versions");
1493 if (_prev_methods == NULL) {
1494 // This is the first previous version so make some space.
1495 // Start with 2 elements under the assumption that the class
1496 // won't be redefined much.
1497 _prev_methods = new (ResourceObj::C_HEAP) GrowableArray<jweak>(2, true);
1498 }
1500 // RC_TRACE macro has an embedded ResourceMark
1501 RC_TRACE(0x00000100,
1502 ("add: %s(%s): adding prev version ref for cached method @%d",
1503 method->name()->as_C_string(), method->signature()->as_C_string(),
1504 _prev_methods->length()));
1506 methodHandle method_h(method);
1507 jweak method_ref = JNIHandles::make_weak_global(method_h);
1508 _prev_methods->append(method_ref);
1510 // Using weak references allows previous versions of the cached
1511 // method to be GC'ed when they are no longer needed. Since the
1512 // caller is the VMThread and we are at a safepoint, this is a good
1513 // time to clear out unused weak references.
1515 for (int i = _prev_methods->length() - 1; i >= 0; i--) {
1516 jweak method_ref = _prev_methods->at(i);
1517 assert(method_ref != NULL, "weak method ref was unexpectedly cleared");
1518 if (method_ref == NULL) {
1519 _prev_methods->remove_at(i);
1520 // Since we are traversing the array backwards, we don't have to
1521 // do anything special with the index.
1522 continue; // robustness
1523 }
1525 methodOop m = (methodOop)JNIHandles::resolve(method_ref);
1526 if (m == NULL) {
1527 // this method entry has been GC'ed so remove it
1528 JNIHandles::destroy_weak_global(method_ref);
1529 _prev_methods->remove_at(i);
1530 } else {
1531 // RC_TRACE macro has an embedded ResourceMark
1532 RC_TRACE(0x00000400, ("add: %s(%s): previous cached method @%d is alive",
1533 m->name()->as_C_string(), m->signature()->as_C_string(), i));
1534 }
1535 }
1536 } // end add_previous_version()
1539 bool ActiveMethodOopsCache::is_same_method(const methodOop method) const {
1540 instanceKlass* ik = instanceKlass::cast(klass());
1541 methodOop check_method = ik->method_with_idnum(method_idnum());
1542 assert(check_method != NULL, "sanity check");
1543 if (check_method == method) {
1544 // done with the easy case
1545 return true;
1546 }
1548 if (_prev_methods != NULL) {
1549 // The cached method has been redefined at least once so search
1550 // the previous versions for a match.
1551 for (int i = 0; i < _prev_methods->length(); i++) {
1552 jweak method_ref = _prev_methods->at(i);
1553 assert(method_ref != NULL, "weak method ref was unexpectedly cleared");
1554 if (method_ref == NULL) {
1555 continue; // robustness
1556 }
1558 check_method = (methodOop)JNIHandles::resolve(method_ref);
1559 if (check_method == method) {
1560 // a previous version matches
1561 return true;
1562 }
1563 }
1564 }
1566 // either no previous versions or no previous version matched
1567 return false;
1568 }
1571 methodOop LatestMethodOopCache::get_methodOop() {
1572 instanceKlass* ik = instanceKlass::cast(klass());
1573 methodOop m = ik->method_with_idnum(method_idnum());
1574 assert(m != NULL, "sanity check");
1575 return m;
1576 }
1579 #ifdef ASSERT
1580 // Release dummy object(s) at bottom of heap
1581 bool Universe::release_fullgc_alot_dummy() {
1582 MutexLocker ml(FullGCALot_lock);
1583 if (_fullgc_alot_dummy_array != NULL) {
1584 if (_fullgc_alot_dummy_next >= _fullgc_alot_dummy_array->length()) {
1585 // No more dummies to release, release entire array instead
1586 _fullgc_alot_dummy_array = NULL;
1587 return false;
1588 }
1589 if (!UseConcMarkSweepGC) {
1590 // Release dummy at bottom of old generation
1591 _fullgc_alot_dummy_array->obj_at_put(_fullgc_alot_dummy_next++, NULL);
1592 }
1593 // Release dummy at bottom of permanent generation
1594 _fullgc_alot_dummy_array->obj_at_put(_fullgc_alot_dummy_next++, NULL);
1595 }
1596 return true;
1597 }
1599 #endif // ASSERT
