| /* |
| * Copyright (c) 1997, 2016, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| * |
| */ |
| |
| #include "precompiled.hpp" |
| #include "classfile/classLoader.hpp" |
| #include "classfile/classLoaderData.hpp" |
| #include "classfile/javaClasses.hpp" |
| #include "classfile/stringTable.hpp" |
| #include "classfile/systemDictionary.hpp" |
| #include "classfile/vmSymbols.hpp" |
| #include "code/codeCache.hpp" |
| #include "code/dependencies.hpp" |
| #include "gc/shared/cardTableModRefBS.hpp" |
| #include "gc/shared/collectedHeap.inline.hpp" |
| #include "gc/shared/gcLocker.inline.hpp" |
| #include "gc/shared/genCollectedHeap.hpp" |
| #include "gc/shared/generation.hpp" |
| #include "gc/shared/gcTraceTime.inline.hpp" |
| #include "gc/shared/space.hpp" |
| #include "interpreter/interpreter.hpp" |
| #include "logging/log.hpp" |
| #include "memory/filemap.hpp" |
| #include "memory/metadataFactory.hpp" |
| #include "memory/metaspaceShared.hpp" |
| #include "memory/oopFactory.hpp" |
| #include "memory/universe.hpp" |
| #include "memory/universe.inline.hpp" |
| #include "oops/constantPool.hpp" |
| #include "oops/instanceClassLoaderKlass.hpp" |
| #include "oops/instanceKlass.hpp" |
| #include "oops/instanceMirrorKlass.hpp" |
| #include "oops/instanceRefKlass.hpp" |
| #include "oops/objArrayOop.inline.hpp" |
| #include "oops/oop.inline.hpp" |
| #include "oops/typeArrayKlass.hpp" |
| #include "prims/jvmtiRedefineClassesTrace.hpp" |
| #include "runtime/arguments.hpp" |
| #include "runtime/atomic.inline.hpp" |
| #include "runtime/commandLineFlagConstraintList.hpp" |
| #include "runtime/deoptimization.hpp" |
| #include "runtime/fprofiler.hpp" |
| #include "runtime/handles.inline.hpp" |
| #include "runtime/init.hpp" |
| #include "runtime/java.hpp" |
| #include "runtime/javaCalls.hpp" |
| #include "runtime/logTimer.hpp" |
| #include "runtime/sharedRuntime.hpp" |
| #include "runtime/synchronizer.hpp" |
| #include "runtime/thread.inline.hpp" |
| #include "runtime/timer.hpp" |
| #include "runtime/vm_operations.hpp" |
| #include "services/memoryService.hpp" |
| #include "utilities/copy.hpp" |
| #include "utilities/events.hpp" |
| #include "utilities/hashtable.inline.hpp" |
| #include "utilities/macros.hpp" |
| #include "utilities/ostream.hpp" |
| #include "utilities/preserveException.hpp" |
| #if INCLUDE_ALL_GCS |
| #include "gc/cms/cmsCollectorPolicy.hpp" |
| #include "gc/g1/g1CollectedHeap.inline.hpp" |
| #include "gc/g1/g1CollectorPolicy.hpp" |
| #include "gc/parallel/parallelScavengeHeap.hpp" |
| #include "gc/shared/adaptiveSizePolicy.hpp" |
| #endif // INCLUDE_ALL_GCS |
| #if INCLUDE_CDS |
| #include "classfile/sharedClassUtil.hpp" |
| #endif |
| |
| // Known objects |
| Klass* Universe::_boolArrayKlassObj = NULL; |
| Klass* Universe::_byteArrayKlassObj = NULL; |
| Klass* Universe::_charArrayKlassObj = NULL; |
| Klass* Universe::_intArrayKlassObj = NULL; |
| Klass* Universe::_shortArrayKlassObj = NULL; |
| Klass* Universe::_longArrayKlassObj = NULL; |
| Klass* Universe::_singleArrayKlassObj = NULL; |
| Klass* Universe::_doubleArrayKlassObj = NULL; |
| Klass* Universe::_typeArrayKlassObjs[T_VOID+1] = { NULL /*, NULL...*/ }; |
| Klass* Universe::_objectArrayKlassObj = NULL; |
| oop Universe::_int_mirror = NULL; |
| oop Universe::_float_mirror = NULL; |
| oop Universe::_double_mirror = NULL; |
| oop Universe::_byte_mirror = NULL; |
| oop Universe::_bool_mirror = NULL; |
| oop Universe::_char_mirror = NULL; |
| oop Universe::_long_mirror = NULL; |
| oop Universe::_short_mirror = NULL; |
| oop Universe::_void_mirror = NULL; |
| oop Universe::_mirrors[T_VOID+1] = { NULL /*, NULL...*/ }; |
| oop Universe::_main_thread_group = NULL; |
| oop Universe::_system_thread_group = NULL; |
| objArrayOop Universe::_the_empty_class_klass_array = NULL; |
| Array<Klass*>* Universe::_the_array_interfaces_array = NULL; |
| oop Universe::_the_null_string = NULL; |
| oop Universe::_the_min_jint_string = NULL; |
| LatestMethodCache* Universe::_finalizer_register_cache = NULL; |
| LatestMethodCache* Universe::_loader_addClass_cache = NULL; |
| LatestMethodCache* Universe::_pd_implies_cache = NULL; |
| LatestMethodCache* Universe::_throw_illegal_access_error_cache = NULL; |
| LatestMethodCache* Universe::_do_stack_walk_cache = NULL; |
| oop Universe::_out_of_memory_error_java_heap = NULL; |
| oop Universe::_out_of_memory_error_metaspace = NULL; |
| oop Universe::_out_of_memory_error_class_metaspace = NULL; |
| oop Universe::_out_of_memory_error_array_size = NULL; |
| oop Universe::_out_of_memory_error_gc_overhead_limit = NULL; |
| oop Universe::_out_of_memory_error_realloc_objects = NULL; |
| oop Universe::_delayed_stack_overflow_error_message = NULL; |
| objArrayOop Universe::_preallocated_out_of_memory_error_array = NULL; |
| volatile jint Universe::_preallocated_out_of_memory_error_avail_count = 0; |
| bool Universe::_verify_in_progress = false; |
| long Universe::verify_flags = Universe::Verify_All; |
| oop Universe::_null_ptr_exception_instance = NULL; |
| oop Universe::_arithmetic_exception_instance = NULL; |
| oop Universe::_virtual_machine_error_instance = NULL; |
| oop Universe::_vm_exception = NULL; |
| oop Universe::_allocation_context_notification_obj = NULL; |
| |
| Array<int>* Universe::_the_empty_int_array = NULL; |
| Array<u2>* Universe::_the_empty_short_array = NULL; |
| Array<Klass*>* Universe::_the_empty_klass_array = NULL; |
| Array<Method*>* Universe::_the_empty_method_array = NULL; |
| |
| // These variables are guarded by FullGCALot_lock. |
| debug_only(objArrayOop Universe::_fullgc_alot_dummy_array = NULL;) |
| debug_only(int Universe::_fullgc_alot_dummy_next = 0;) |
| |
| // Heap |
| int Universe::_verify_count = 0; |
| |
| // Oop verification (see MacroAssembler::verify_oop) |
| uintptr_t Universe::_verify_oop_mask = 0; |
| uintptr_t Universe::_verify_oop_bits = (uintptr_t) -1; |
| |
| int Universe::_base_vtable_size = 0; |
| bool Universe::_bootstrapping = false; |
| bool Universe::_module_initialized = false; |
| bool Universe::_fully_initialized = false; |
| |
| size_t Universe::_heap_capacity_at_last_gc; |
| size_t Universe::_heap_used_at_last_gc = 0; |
| |
| CollectedHeap* Universe::_collectedHeap = NULL; |
| |
| NarrowPtrStruct Universe::_narrow_oop = { NULL, 0, true }; |
| NarrowPtrStruct Universe::_narrow_klass = { NULL, 0, true }; |
| address Universe::_narrow_ptrs_base; |
| |
| void Universe::basic_type_classes_do(void f(Klass*)) { |
| f(boolArrayKlassObj()); |
| f(byteArrayKlassObj()); |
| f(charArrayKlassObj()); |
| f(intArrayKlassObj()); |
| f(shortArrayKlassObj()); |
| f(longArrayKlassObj()); |
| f(singleArrayKlassObj()); |
| f(doubleArrayKlassObj()); |
| } |
| |
| void Universe::oops_do(OopClosure* f, bool do_all) { |
| |
| f->do_oop((oop*) &_int_mirror); |
| f->do_oop((oop*) &_float_mirror); |
| f->do_oop((oop*) &_double_mirror); |
| f->do_oop((oop*) &_byte_mirror); |
| f->do_oop((oop*) &_bool_mirror); |
| f->do_oop((oop*) &_char_mirror); |
| f->do_oop((oop*) &_long_mirror); |
| f->do_oop((oop*) &_short_mirror); |
| f->do_oop((oop*) &_void_mirror); |
| |
| for (int i = T_BOOLEAN; i < T_VOID+1; i++) { |
| f->do_oop((oop*) &_mirrors[i]); |
| } |
| assert(_mirrors[0] == NULL && _mirrors[T_BOOLEAN - 1] == NULL, "checking"); |
| |
| f->do_oop((oop*)&_the_empty_class_klass_array); |
| f->do_oop((oop*)&_the_null_string); |
| f->do_oop((oop*)&_the_min_jint_string); |
| f->do_oop((oop*)&_out_of_memory_error_java_heap); |
| f->do_oop((oop*)&_out_of_memory_error_metaspace); |
| f->do_oop((oop*)&_out_of_memory_error_class_metaspace); |
| f->do_oop((oop*)&_out_of_memory_error_array_size); |
| f->do_oop((oop*)&_out_of_memory_error_gc_overhead_limit); |
| f->do_oop((oop*)&_out_of_memory_error_realloc_objects); |
| f->do_oop((oop*)&_delayed_stack_overflow_error_message); |
| f->do_oop((oop*)&_preallocated_out_of_memory_error_array); |
| f->do_oop((oop*)&_null_ptr_exception_instance); |
| f->do_oop((oop*)&_arithmetic_exception_instance); |
| f->do_oop((oop*)&_virtual_machine_error_instance); |
| f->do_oop((oop*)&_main_thread_group); |
| f->do_oop((oop*)&_system_thread_group); |
| f->do_oop((oop*)&_vm_exception); |
| f->do_oop((oop*)&_allocation_context_notification_obj); |
| debug_only(f->do_oop((oop*)&_fullgc_alot_dummy_array);) |
| } |
| |
| // Serialize metadata in and out of CDS archive, not oops. |
| void Universe::serialize(SerializeClosure* f, bool do_all) { |
| |
| f->do_ptr((void**)&_boolArrayKlassObj); |
| f->do_ptr((void**)&_byteArrayKlassObj); |
| f->do_ptr((void**)&_charArrayKlassObj); |
| f->do_ptr((void**)&_intArrayKlassObj); |
| f->do_ptr((void**)&_shortArrayKlassObj); |
| f->do_ptr((void**)&_longArrayKlassObj); |
| f->do_ptr((void**)&_singleArrayKlassObj); |
| f->do_ptr((void**)&_doubleArrayKlassObj); |
| f->do_ptr((void**)&_objectArrayKlassObj); |
| |
| { |
| for (int i = 0; i < T_VOID+1; i++) { |
| if (_typeArrayKlassObjs[i] != NULL) { |
| assert(i >= T_BOOLEAN, "checking"); |
| f->do_ptr((void**)&_typeArrayKlassObjs[i]); |
| } else if (do_all) { |
| f->do_ptr((void**)&_typeArrayKlassObjs[i]); |
| } |
| } |
| } |
| |
| f->do_ptr((void**)&_the_array_interfaces_array); |
| f->do_ptr((void**)&_the_empty_int_array); |
| f->do_ptr((void**)&_the_empty_short_array); |
| f->do_ptr((void**)&_the_empty_method_array); |
| f->do_ptr((void**)&_the_empty_klass_array); |
| _finalizer_register_cache->serialize(f); |
| _loader_addClass_cache->serialize(f); |
| _pd_implies_cache->serialize(f); |
| _throw_illegal_access_error_cache->serialize(f); |
| _do_stack_walk_cache->serialize(f); |
| } |
| |
| void Universe::check_alignment(uintx size, uintx alignment, const char* name) { |
| if (size < alignment || size % alignment != 0) { |
| vm_exit_during_initialization( |
| err_msg("Size of %s (" UINTX_FORMAT " bytes) must be aligned to " UINTX_FORMAT " bytes", name, size, alignment)); |
| } |
| } |
| |
| void initialize_basic_type_klass(Klass* k, TRAPS) { |
| Klass* ok = SystemDictionary::Object_klass(); |
| if (UseSharedSpaces) { |
| ClassLoaderData* loader_data = ClassLoaderData::the_null_class_loader_data(); |
| assert(k->super() == ok, "u3"); |
| k->restore_unshareable_info(loader_data, Handle(), CHECK); |
| } else { |
| k->initialize_supers(ok, CHECK); |
| } |
| k->append_to_sibling_list(); |
| } |
| |
| void Universe::genesis(TRAPS) { |
| ResourceMark rm; |
| |
| { FlagSetting fs(_bootstrapping, true); |
| |
| { MutexLocker mc(Compile_lock); |
| |
| // determine base vtable size; without that we cannot create the array klasses |
| compute_base_vtable_size(); |
| |
| if (!UseSharedSpaces) { |
| _boolArrayKlassObj = TypeArrayKlass::create_klass(T_BOOLEAN, sizeof(jboolean), CHECK); |
| _charArrayKlassObj = TypeArrayKlass::create_klass(T_CHAR, sizeof(jchar), CHECK); |
| _singleArrayKlassObj = TypeArrayKlass::create_klass(T_FLOAT, sizeof(jfloat), CHECK); |
| _doubleArrayKlassObj = TypeArrayKlass::create_klass(T_DOUBLE, sizeof(jdouble), CHECK); |
| _byteArrayKlassObj = TypeArrayKlass::create_klass(T_BYTE, sizeof(jbyte), CHECK); |
| _shortArrayKlassObj = TypeArrayKlass::create_klass(T_SHORT, sizeof(jshort), CHECK); |
| _intArrayKlassObj = TypeArrayKlass::create_klass(T_INT, sizeof(jint), CHECK); |
| _longArrayKlassObj = TypeArrayKlass::create_klass(T_LONG, sizeof(jlong), CHECK); |
| |
| _typeArrayKlassObjs[T_BOOLEAN] = _boolArrayKlassObj; |
| _typeArrayKlassObjs[T_CHAR] = _charArrayKlassObj; |
| _typeArrayKlassObjs[T_FLOAT] = _singleArrayKlassObj; |
| _typeArrayKlassObjs[T_DOUBLE] = _doubleArrayKlassObj; |
| _typeArrayKlassObjs[T_BYTE] = _byteArrayKlassObj; |
| _typeArrayKlassObjs[T_SHORT] = _shortArrayKlassObj; |
| _typeArrayKlassObjs[T_INT] = _intArrayKlassObj; |
| _typeArrayKlassObjs[T_LONG] = _longArrayKlassObj; |
| |
| ClassLoaderData* null_cld = ClassLoaderData::the_null_class_loader_data(); |
| |
| _the_array_interfaces_array = MetadataFactory::new_array<Klass*>(null_cld, 2, NULL, CHECK); |
| _the_empty_int_array = MetadataFactory::new_array<int>(null_cld, 0, CHECK); |
| _the_empty_short_array = MetadataFactory::new_array<u2>(null_cld, 0, CHECK); |
| _the_empty_method_array = MetadataFactory::new_array<Method*>(null_cld, 0, CHECK); |
| _the_empty_klass_array = MetadataFactory::new_array<Klass*>(null_cld, 0, CHECK); |
| } |
| } |
| |
| vmSymbols::initialize(CHECK); |
| |
| SystemDictionary::initialize(CHECK); |
| |
| Klass* ok = SystemDictionary::Object_klass(); |
| |
| _the_null_string = StringTable::intern("null", CHECK); |
| _the_min_jint_string = StringTable::intern("-2147483648", CHECK); |
| |
| if (UseSharedSpaces) { |
| // Verify shared interfaces array. |
| assert(_the_array_interfaces_array->at(0) == |
| SystemDictionary::Cloneable_klass(), "u3"); |
| assert(_the_array_interfaces_array->at(1) == |
| SystemDictionary::Serializable_klass(), "u3"); |
| MetaspaceShared::fixup_shared_string_regions(); |
| } else { |
| // Set up shared interfaces array. (Do this before supers are set up.) |
| _the_array_interfaces_array->at_put(0, SystemDictionary::Cloneable_klass()); |
| _the_array_interfaces_array->at_put(1, SystemDictionary::Serializable_klass()); |
| } |
| |
| initialize_basic_type_klass(boolArrayKlassObj(), CHECK); |
| initialize_basic_type_klass(charArrayKlassObj(), CHECK); |
| initialize_basic_type_klass(singleArrayKlassObj(), CHECK); |
| initialize_basic_type_klass(doubleArrayKlassObj(), CHECK); |
| initialize_basic_type_klass(byteArrayKlassObj(), CHECK); |
| initialize_basic_type_klass(shortArrayKlassObj(), CHECK); |
| initialize_basic_type_klass(intArrayKlassObj(), CHECK); |
| initialize_basic_type_klass(longArrayKlassObj(), CHECK); |
| } // end of core bootstrapping |
| |
| // Maybe this could be lifted up now that object array can be initialized |
| // during the bootstrapping. |
| |
| // OLD |
| // Initialize _objectArrayKlass after core bootstraping to make |
| // sure the super class is set up properly for _objectArrayKlass. |
| // --- |
| // NEW |
| // Since some of the old system object arrays have been converted to |
| // ordinary object arrays, _objectArrayKlass will be loaded when |
| // SystemDictionary::initialize(CHECK); is run. See the extra check |
| // for Object_klass_loaded in objArrayKlassKlass::allocate_objArray_klass_impl. |
| _objectArrayKlassObj = InstanceKlass:: |
| cast(SystemDictionary::Object_klass())->array_klass(1, CHECK); |
| // OLD |
| // Add the class to the class hierarchy manually to make sure that |
| // its vtable is initialized after core bootstrapping is completed. |
| // --- |
| // New |
| // Have already been initialized. |
| _objectArrayKlassObj->append_to_sibling_list(); |
| |
| #ifdef ASSERT |
| if (FullGCALot) { |
| // Allocate an array of dummy objects. |
| // We'd like these to be at the bottom of the old generation, |
| // so that when we free one and then collect, |
| // (almost) the whole heap moves |
| // and we find out if we actually update all the oops correctly. |
| // But we can't allocate directly in the old generation, |
| // so we allocate wherever, and hope that the first collection |
| // moves these objects to the bottom of the old generation. |
| // We can allocate directly in the permanent generation, so we do. |
| int size; |
| if (UseConcMarkSweepGC) { |
| warning("Using +FullGCALot with concurrent mark sweep gc " |
| "will not force all objects to relocate"); |
| size = FullGCALotDummies; |
| } else { |
| size = FullGCALotDummies * 2; |
| } |
| objArrayOop naked_array = oopFactory::new_objArray(SystemDictionary::Object_klass(), size, CHECK); |
| objArrayHandle dummy_array(THREAD, naked_array); |
| int i = 0; |
| while (i < size) { |
| // Allocate dummy in old generation |
| oop dummy = SystemDictionary::Object_klass()->allocate_instance(CHECK); |
| dummy_array->obj_at_put(i++, dummy); |
| } |
| { |
| // Only modify the global variable inside the mutex. |
| // If we had a race to here, the other dummy_array instances |
| // and their elements just get dropped on the floor, which is fine. |
| MutexLocker ml(FullGCALot_lock); |
| if (_fullgc_alot_dummy_array == NULL) { |
| _fullgc_alot_dummy_array = dummy_array(); |
| } |
| } |
| assert(i == _fullgc_alot_dummy_array->length(), "just checking"); |
| } |
| #endif |
| |
| // Initialize dependency array for null class loader |
| ClassLoaderData::the_null_class_loader_data()->init_dependencies(CHECK); |
| |
| } |
| |
| // CDS support for patching vtables in metadata in the shared archive. |
| // All types inherited from Metadata have vtables, but not types inherited |
| // from MetaspaceObj, because the latter does not have virtual functions. |
| // If the metadata type has a vtable, it cannot be shared in the read-only |
| // section of the CDS archive, because the vtable pointer is patched. |
| static inline void add_vtable(void** list, int* n, void* o, int count) { |
| guarantee((*n) < count, "vtable list too small"); |
| void* vtable = dereference_vptr(o); |
| assert(*(void**)(vtable) != NULL, "invalid vtable"); |
| list[(*n)++] = vtable; |
| } |
| |
| void Universe::init_self_patching_vtbl_list(void** list, int count) { |
| int n = 0; |
| { InstanceKlass o; add_vtable(list, &n, &o, count); } |
| { InstanceClassLoaderKlass o; add_vtable(list, &n, &o, count); } |
| { InstanceMirrorKlass o; add_vtable(list, &n, &o, count); } |
| { InstanceRefKlass o; add_vtable(list, &n, &o, count); } |
| { TypeArrayKlass o; add_vtable(list, &n, &o, count); } |
| { ObjArrayKlass o; add_vtable(list, &n, &o, count); } |
| { Method o; add_vtable(list, &n, &o, count); } |
| { ConstantPool o; add_vtable(list, &n, &o, count); } |
| } |
| |
| void Universe::initialize_basic_type_mirrors(TRAPS) { |
| assert(_int_mirror==NULL, "basic type mirrors already initialized"); |
| _int_mirror = |
| java_lang_Class::create_basic_type_mirror("int", T_INT, CHECK); |
| _float_mirror = |
| java_lang_Class::create_basic_type_mirror("float", T_FLOAT, CHECK); |
| _double_mirror = |
| java_lang_Class::create_basic_type_mirror("double", T_DOUBLE, CHECK); |
| _byte_mirror = |
| java_lang_Class::create_basic_type_mirror("byte", T_BYTE, CHECK); |
| _bool_mirror = |
| java_lang_Class::create_basic_type_mirror("boolean",T_BOOLEAN, CHECK); |
| _char_mirror = |
| java_lang_Class::create_basic_type_mirror("char", T_CHAR, CHECK); |
| _long_mirror = |
| java_lang_Class::create_basic_type_mirror("long", T_LONG, CHECK); |
| _short_mirror = |
| java_lang_Class::create_basic_type_mirror("short", T_SHORT, CHECK); |
| _void_mirror = |
| java_lang_Class::create_basic_type_mirror("void", T_VOID, CHECK); |
| |
| _mirrors[T_INT] = _int_mirror; |
| _mirrors[T_FLOAT] = _float_mirror; |
| _mirrors[T_DOUBLE] = _double_mirror; |
| _mirrors[T_BYTE] = _byte_mirror; |
| _mirrors[T_BOOLEAN] = _bool_mirror; |
| _mirrors[T_CHAR] = _char_mirror; |
| _mirrors[T_LONG] = _long_mirror; |
| _mirrors[T_SHORT] = _short_mirror; |
| _mirrors[T_VOID] = _void_mirror; |
| //_mirrors[T_OBJECT] = _object_klass->java_mirror(); |
| //_mirrors[T_ARRAY] = _object_klass->java_mirror(); |
| } |
| |
| void Universe::fixup_mirrors(TRAPS) { |
| // Bootstrap problem: all classes gets a mirror (java.lang.Class instance) assigned eagerly, |
| // but we cannot do that for classes created before java.lang.Class is loaded. Here we simply |
| // walk over permanent objects created so far (mostly classes) and fixup their mirrors. Note |
| // that the number of objects allocated at this point is very small. |
| assert(SystemDictionary::Class_klass_loaded(), "java.lang.Class should be loaded"); |
| HandleMark hm(THREAD); |
| // Cache the start of the static fields |
| InstanceMirrorKlass::init_offset_of_static_fields(); |
| |
| GrowableArray <Klass*>* list = java_lang_Class::fixup_mirror_list(); |
| int list_length = list->length(); |
| for (int i = 0; i < list_length; i++) { |
| Klass* k = list->at(i); |
| assert(k->is_klass(), "List should only hold classes"); |
| EXCEPTION_MARK; |
| KlassHandle kh(THREAD, k); |
| java_lang_Class::fixup_mirror(kh, CATCH); |
| } |
| delete java_lang_Class::fixup_mirror_list(); |
| java_lang_Class::set_fixup_mirror_list(NULL); |
| } |
| |
| static bool has_run_finalizers_on_exit = false; |
| |
| void Universe::run_finalizers_on_exit() { |
| if (has_run_finalizers_on_exit) return; |
| has_run_finalizers_on_exit = true; |
| |
| // Called on VM exit. This ought to be run in a separate thread. |
| log_trace(ref)("Callback to run finalizers on exit"); |
| { |
| PRESERVE_EXCEPTION_MARK; |
| KlassHandle finalizer_klass(THREAD, SystemDictionary::Finalizer_klass()); |
| JavaValue result(T_VOID); |
| JavaCalls::call_static( |
| &result, |
| finalizer_klass, |
| vmSymbols::run_finalizers_on_exit_name(), |
| vmSymbols::void_method_signature(), |
| THREAD |
| ); |
| // Ignore any pending exceptions |
| CLEAR_PENDING_EXCEPTION; |
| } |
| } |
| |
| |
| // initialize_vtable could cause gc if |
| // 1) we specified true to initialize_vtable and |
| // 2) this ran after gc was enabled |
| // In case those ever change we use handles for oops |
| void Universe::reinitialize_vtable_of(KlassHandle k_h, TRAPS) { |
| // init vtable of k and all subclasses |
| Klass* ko = k_h(); |
| klassVtable* vt = ko->vtable(); |
| if (vt) vt->initialize_vtable(false, CHECK); |
| if (ko->is_instance_klass()) { |
| for (KlassHandle s_h(THREAD, ko->subklass()); |
| s_h() != NULL; |
| s_h = KlassHandle(THREAD, s_h()->next_sibling())) { |
| reinitialize_vtable_of(s_h, CHECK); |
| } |
| } |
| } |
| |
| |
| void initialize_itable_for_klass(Klass* k, TRAPS) { |
| InstanceKlass::cast(k)->itable()->initialize_itable(false, CHECK); |
| } |
| |
| |
| void Universe::reinitialize_itables(TRAPS) { |
| SystemDictionary::classes_do(initialize_itable_for_klass, CHECK); |
| |
| } |
| |
| |
| bool Universe::on_page_boundary(void* addr) { |
| return ((uintptr_t) addr) % os::vm_page_size() == 0; |
| } |
| |
| |
| bool Universe::should_fill_in_stack_trace(Handle throwable) { |
| // never attempt to fill in the stack trace of preallocated errors that do not have |
| // backtrace. These errors are kept alive forever and may be "re-used" when all |
| // preallocated errors with backtrace have been consumed. Also need to avoid |
| // a potential loop which could happen if an out of memory occurs when attempting |
| // to allocate the backtrace. |
| return ((throwable() != Universe::_out_of_memory_error_java_heap) && |
| (throwable() != Universe::_out_of_memory_error_metaspace) && |
| (throwable() != Universe::_out_of_memory_error_class_metaspace) && |
| (throwable() != Universe::_out_of_memory_error_array_size) && |
| (throwable() != Universe::_out_of_memory_error_gc_overhead_limit) && |
| (throwable() != Universe::_out_of_memory_error_realloc_objects)); |
| } |
| |
| |
| oop Universe::gen_out_of_memory_error(oop default_err) { |
| // generate an out of memory error: |
| // - if there is a preallocated error with backtrace available then return it wth |
| // a filled in stack trace. |
| // - if there are no preallocated errors with backtrace available then return |
| // an error without backtrace. |
| int next; |
| if (_preallocated_out_of_memory_error_avail_count > 0) { |
| next = (int)Atomic::add(-1, &_preallocated_out_of_memory_error_avail_count); |
| assert(next < (int)PreallocatedOutOfMemoryErrorCount, "avail count is corrupt"); |
| } else { |
| next = -1; |
| } |
| if (next < 0) { |
| // all preallocated errors have been used. |
| // return default |
| return default_err; |
| } else { |
| // get the error object at the slot and set set it to NULL so that the |
| // array isn't keeping it alive anymore. |
| oop exc = preallocated_out_of_memory_errors()->obj_at(next); |
| assert(exc != NULL, "slot has been used already"); |
| preallocated_out_of_memory_errors()->obj_at_put(next, NULL); |
| |
| // use the message from the default error |
| oop msg = java_lang_Throwable::message(default_err); |
| assert(msg != NULL, "no message"); |
| java_lang_Throwable::set_message(exc, msg); |
| |
| // populate the stack trace and return it. |
| java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(exc); |
| return exc; |
| } |
| } |
| |
| intptr_t Universe::_non_oop_bits = 0; |
| |
| void* Universe::non_oop_word() { |
| // Neither the high bits nor the low bits of this value is allowed |
| // to look like (respectively) the high or low bits of a real oop. |
| // |
| // High and low are CPU-specific notions, but low always includes |
| // the low-order bit. Since oops are always aligned at least mod 4, |
| // setting the low-order bit will ensure that the low half of the |
| // word will never look like that of a real oop. |
| // |
| // Using the OS-supplied non-memory-address word (usually 0 or -1) |
| // will take care of the high bits, however many there are. |
| |
| if (_non_oop_bits == 0) { |
| _non_oop_bits = (intptr_t)os::non_memory_address_word() | 1; |
| } |
| |
| return (void*)_non_oop_bits; |
| } |
| |
| jint universe_init() { |
| assert(!Universe::_fully_initialized, "called after initialize_vtables"); |
| guarantee(1 << LogHeapWordSize == sizeof(HeapWord), |
| "LogHeapWordSize is incorrect."); |
| guarantee(sizeof(oop) >= sizeof(HeapWord), "HeapWord larger than oop?"); |
| guarantee(sizeof(oop) % sizeof(HeapWord) == 0, |
| "oop size is not not a multiple of HeapWord size"); |
| |
| TraceStartupTime timer("Genesis"); |
| |
| JavaClasses::compute_hard_coded_offsets(); |
| |
| jint status = Universe::initialize_heap(); |
| if (status != JNI_OK) { |
| return status; |
| } |
| |
| Metaspace::global_initialize(); |
| |
| // Checks 'AfterMemoryInit' constraints. |
| if (!CommandLineFlagConstraintList::check_constraints(CommandLineFlagConstraint::AfterMemoryInit)) { |
| return JNI_EINVAL; |
| } |
| |
| // Create memory for metadata. Must be after initializing heap for |
| // DumpSharedSpaces. |
| ClassLoaderData::init_null_class_loader_data(); |
| |
| // We have a heap so create the Method* caches before |
| // Metaspace::initialize_shared_spaces() tries to populate them. |
| Universe::_finalizer_register_cache = new LatestMethodCache(); |
| Universe::_loader_addClass_cache = new LatestMethodCache(); |
| Universe::_pd_implies_cache = new LatestMethodCache(); |
| Universe::_throw_illegal_access_error_cache = new LatestMethodCache(); |
| Universe::_do_stack_walk_cache = new LatestMethodCache(); |
| |
| if (UseSharedSpaces) { |
| // Read the data structures supporting the shared spaces (shared |
| // system dictionary, symbol table, etc.). After that, access to |
| // the file (other than the mapped regions) is no longer needed, and |
| // the file is closed. Closing the file does not affect the |
| // currently mapped regions. |
| MetaspaceShared::initialize_shared_spaces(); |
| StringTable::create_table(); |
| } else { |
| SymbolTable::create_table(); |
| StringTable::create_table(); |
| |
| if (DumpSharedSpaces) { |
| MetaspaceShared::prepare_for_dumping(); |
| } |
| } |
| if (strlen(VerifySubSet) > 0) { |
| Universe::initialize_verify_flags(); |
| } |
| |
| return JNI_OK; |
| } |
| |
| CollectedHeap* Universe::create_heap() { |
| assert(_collectedHeap == NULL, "Heap already created"); |
| #if !INCLUDE_ALL_GCS |
| if (UseParallelGC) { |
| fatal("UseParallelGC not supported in this VM."); |
| } else if (UseG1GC) { |
| fatal("UseG1GC not supported in this VM."); |
| } else if (UseConcMarkSweepGC) { |
| fatal("UseConcMarkSweepGC not supported in this VM."); |
| #else |
| if (UseParallelGC) { |
| return Universe::create_heap_with_policy<ParallelScavengeHeap, GenerationSizer>(); |
| } else if (UseG1GC) { |
| return Universe::create_heap_with_policy<G1CollectedHeap, G1CollectorPolicy>(); |
| } else if (UseConcMarkSweepGC) { |
| return Universe::create_heap_with_policy<GenCollectedHeap, ConcurrentMarkSweepPolicy>(); |
| #endif |
| } else if (UseSerialGC) { |
| return Universe::create_heap_with_policy<GenCollectedHeap, MarkSweepPolicy>(); |
| } |
| |
| ShouldNotReachHere(); |
| return NULL; |
| } |
| |
| // Choose the heap base address and oop encoding mode |
| // when compressed oops are used: |
| // Unscaled - Use 32-bits oops without encoding when |
| // NarrowOopHeapBaseMin + heap_size < 4Gb |
| // ZeroBased - Use zero based compressed oops with encoding when |
| // NarrowOopHeapBaseMin + heap_size < 32Gb |
| // HeapBased - Use compressed oops with heap base + encoding. |
| |
| jint Universe::initialize_heap() { |
| jint status = JNI_ERR; |
| |
| _collectedHeap = create_heap_ext(); |
| if (_collectedHeap == NULL) { |
| _collectedHeap = create_heap(); |
| } |
| |
| status = _collectedHeap->initialize(); |
| if (status != JNI_OK) { |
| return status; |
| } |
| log_info(gc)("Using %s", _collectedHeap->name()); |
| |
| ThreadLocalAllocBuffer::set_max_size(Universe::heap()->max_tlab_size()); |
| |
| #ifdef _LP64 |
| if (UseCompressedOops) { |
| // Subtract a page because something can get allocated at heap base. |
| // This also makes implicit null checking work, because the |
| // memory+1 page below heap_base needs to cause a signal. |
| // See needs_explicit_null_check. |
| // Only set the heap base for compressed oops because it indicates |
| // compressed oops for pstack code. |
| if ((uint64_t)Universe::heap()->reserved_region().end() > UnscaledOopHeapMax) { |
| // Didn't reserve heap below 4Gb. Must shift. |
| Universe::set_narrow_oop_shift(LogMinObjAlignmentInBytes); |
| } |
| if ((uint64_t)Universe::heap()->reserved_region().end() <= OopEncodingHeapMax) { |
| // Did reserve heap below 32Gb. Can use base == 0; |
| Universe::set_narrow_oop_base(0); |
| } |
| |
| Universe::set_narrow_ptrs_base(Universe::narrow_oop_base()); |
| |
| if (PrintCompressedOopsMode || (PrintMiscellaneous && Verbose)) { |
| Universe::print_compressed_oops_mode(tty); |
| } |
| |
| // Tell tests in which mode we run. |
| Arguments::PropertyList_add(new SystemProperty("java.vm.compressedOopsMode", |
| narrow_oop_mode_to_string(narrow_oop_mode()), |
| false)); |
| } |
| // Universe::narrow_oop_base() is one page below the heap. |
| assert((intptr_t)Universe::narrow_oop_base() <= (intptr_t)(Universe::heap()->base() - |
| os::vm_page_size()) || |
| Universe::narrow_oop_base() == NULL, "invalid value"); |
| assert(Universe::narrow_oop_shift() == LogMinObjAlignmentInBytes || |
| Universe::narrow_oop_shift() == 0, "invalid value"); |
| #endif |
| |
| // We will never reach the CATCH below since Exceptions::_throw will cause |
| // the VM to exit if an exception is thrown during initialization |
| |
| if (UseTLAB) { |
| assert(Universe::heap()->supports_tlab_allocation(), |
| "Should support thread-local allocation buffers"); |
| ThreadLocalAllocBuffer::startup_initialization(); |
| } |
| return JNI_OK; |
| } |
| |
| void Universe::print_compressed_oops_mode(outputStream* st) { |
| st->print("heap address: " PTR_FORMAT ", size: " SIZE_FORMAT " MB", |
| p2i(Universe::heap()->base()), Universe::heap()->reserved_region().byte_size()/M); |
| |
| st->print(", Compressed Oops mode: %s", narrow_oop_mode_to_string(narrow_oop_mode())); |
| |
| if (Universe::narrow_oop_base() != 0) { |
| st->print(": " PTR_FORMAT, p2i(Universe::narrow_oop_base())); |
| } |
| |
| if (Universe::narrow_oop_shift() != 0) { |
| st->print(", Oop shift amount: %d", Universe::narrow_oop_shift()); |
| } |
| |
| if (!Universe::narrow_oop_use_implicit_null_checks()) { |
| st->print(", no protected page in front of the heap"); |
| } |
| st->cr(); |
| } |
| |
| ReservedSpace Universe::reserve_heap(size_t heap_size, size_t alignment) { |
| |
| assert(alignment <= Arguments::conservative_max_heap_alignment(), |
| "actual alignment " SIZE_FORMAT " must be within maximum heap alignment " SIZE_FORMAT, |
| alignment, Arguments::conservative_max_heap_alignment()); |
| |
| size_t total_reserved = align_size_up(heap_size, alignment); |
| assert(!UseCompressedOops || (total_reserved <= (OopEncodingHeapMax - os::vm_page_size())), |
| "heap size is too big for compressed oops"); |
| |
| bool use_large_pages = UseLargePages && is_size_aligned(alignment, os::large_page_size()); |
| assert(!UseLargePages |
| || UseParallelGC |
| || use_large_pages, "Wrong alignment to use large pages"); |
| |
| // Now create the space. |
| ReservedHeapSpace total_rs(total_reserved, alignment, use_large_pages); |
| |
| if (total_rs.is_reserved()) { |
| assert((total_reserved == total_rs.size()) && ((uintptr_t)total_rs.base() % alignment == 0), |
| "must be exactly of required size and alignment"); |
| // We are good. |
| |
| if (UseCompressedOops) { |
| // Universe::initialize_heap() will reset this to NULL if unscaled |
| // or zero-based narrow oops are actually used. |
| // Else heap start and base MUST differ, so that NULL can be encoded nonambigous. |
| Universe::set_narrow_oop_base((address)total_rs.compressed_oop_base()); |
| } |
| |
| return total_rs; |
| } |
| |
| vm_exit_during_initialization( |
| err_msg("Could not reserve enough space for " SIZE_FORMAT "KB object heap", |
| total_reserved/K)); |
| |
| // satisfy compiler |
| ShouldNotReachHere(); |
| return ReservedHeapSpace(0, 0, false); |
| } |
| |
| |
| // It's the caller's responsibility to ensure glitch-freedom |
| // (if required). |
| void Universe::update_heap_info_at_gc() { |
| _heap_capacity_at_last_gc = heap()->capacity(); |
| _heap_used_at_last_gc = heap()->used(); |
| } |
| |
| |
| const char* Universe::narrow_oop_mode_to_string(Universe::NARROW_OOP_MODE mode) { |
| switch (mode) { |
| case UnscaledNarrowOop: |
| return "32-bit"; |
| case ZeroBasedNarrowOop: |
| return "Zero based"; |
| case DisjointBaseNarrowOop: |
| return "Non-zero disjoint base"; |
| case HeapBasedNarrowOop: |
| return "Non-zero based"; |
| } |
| |
| ShouldNotReachHere(); |
| return ""; |
| } |
| |
| |
| Universe::NARROW_OOP_MODE Universe::narrow_oop_mode() { |
| if (narrow_oop_base_disjoint()) { |
| return DisjointBaseNarrowOop; |
| } |
| |
| if (narrow_oop_base() != 0) { |
| return HeapBasedNarrowOop; |
| } |
| |
| if (narrow_oop_shift() != 0) { |
| return ZeroBasedNarrowOop; |
| } |
| |
| return UnscaledNarrowOop; |
| } |
| |
| |
| void universe2_init() { |
| EXCEPTION_MARK; |
| Universe::genesis(CATCH); |
| } |
| |
| // Set after initialization of the module runtime, call_initModuleRuntime |
| void universe_post_module_init() { |
| Universe::_module_initialized = true; |
| } |
| |
| bool universe_post_init() { |
| assert(!is_init_completed(), "Error: initialization not yet completed!"); |
| Universe::_fully_initialized = true; |
| EXCEPTION_MARK; |
| { ResourceMark rm; |
| Interpreter::initialize(); // needed for interpreter entry points |
| if (!UseSharedSpaces) { |
| HandleMark hm(THREAD); |
| KlassHandle ok_h(THREAD, SystemDictionary::Object_klass()); |
| Universe::reinitialize_vtable_of(ok_h, CHECK_false); |
| Universe::reinitialize_itables(CHECK_false); |
| } |
| } |
| |
| HandleMark hm(THREAD); |
| Klass* k; |
| instanceKlassHandle k_h; |
| // Setup preallocated empty java.lang.Class array |
| Universe::_the_empty_class_klass_array = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_false); |
| |
| // Setup preallocated OutOfMemoryError errors |
| k = SystemDictionary::resolve_or_fail(vmSymbols::java_lang_OutOfMemoryError(), true, CHECK_false); |
| k_h = instanceKlassHandle(THREAD, k); |
| Universe::_out_of_memory_error_java_heap = k_h->allocate_instance(CHECK_false); |
| Universe::_out_of_memory_error_metaspace = k_h->allocate_instance(CHECK_false); |
| Universe::_out_of_memory_error_class_metaspace = k_h->allocate_instance(CHECK_false); |
| Universe::_out_of_memory_error_array_size = k_h->allocate_instance(CHECK_false); |
| Universe::_out_of_memory_error_gc_overhead_limit = |
| k_h->allocate_instance(CHECK_false); |
| Universe::_out_of_memory_error_realloc_objects = k_h->allocate_instance(CHECK_false); |
| |
| // Setup preallocated cause message for delayed StackOverflowError |
| if (StackReservedPages > 0) { |
| Universe::_delayed_stack_overflow_error_message = |
| java_lang_String::create_oop_from_str("Delayed StackOverflowError due to ReservedStackAccess annotated method", CHECK_false); |
| } |
| |
| // Setup preallocated NullPointerException |
| // (this is currently used for a cheap & dirty solution in compiler exception handling) |
| k = SystemDictionary::resolve_or_fail(vmSymbols::java_lang_NullPointerException(), true, CHECK_false); |
| Universe::_null_ptr_exception_instance = InstanceKlass::cast(k)->allocate_instance(CHECK_false); |
| // Setup preallocated ArithmeticException |
| // (this is currently used for a cheap & dirty solution in compiler exception handling) |
| k = SystemDictionary::resolve_or_fail(vmSymbols::java_lang_ArithmeticException(), true, CHECK_false); |
| Universe::_arithmetic_exception_instance = InstanceKlass::cast(k)->allocate_instance(CHECK_false); |
| // Virtual Machine Error for when we get into a situation we can't resolve |
| k = SystemDictionary::resolve_or_fail( |
| vmSymbols::java_lang_VirtualMachineError(), true, CHECK_false); |
| bool linked = InstanceKlass::cast(k)->link_class_or_fail(CHECK_false); |
| if (!linked) { |
| tty->print_cr("Unable to link/verify VirtualMachineError class"); |
| return false; // initialization failed |
| } |
| Universe::_virtual_machine_error_instance = |
| InstanceKlass::cast(k)->allocate_instance(CHECK_false); |
| |
| Universe::_vm_exception = InstanceKlass::cast(k)->allocate_instance(CHECK_false); |
| |
| if (!DumpSharedSpaces) { |
| // These are the only Java fields that are currently set during shared space dumping. |
| // We prefer to not handle this generally, so we always reinitialize these detail messages. |
| Handle msg = java_lang_String::create_from_str("Java heap space", CHECK_false); |
| java_lang_Throwable::set_message(Universe::_out_of_memory_error_java_heap, msg()); |
| |
| msg = java_lang_String::create_from_str("Metaspace", CHECK_false); |
| java_lang_Throwable::set_message(Universe::_out_of_memory_error_metaspace, msg()); |
| msg = java_lang_String::create_from_str("Compressed class space", CHECK_false); |
| java_lang_Throwable::set_message(Universe::_out_of_memory_error_class_metaspace, msg()); |
| |
| msg = java_lang_String::create_from_str("Requested array size exceeds VM limit", CHECK_false); |
| java_lang_Throwable::set_message(Universe::_out_of_memory_error_array_size, msg()); |
| |
| msg = java_lang_String::create_from_str("GC overhead limit exceeded", CHECK_false); |
| java_lang_Throwable::set_message(Universe::_out_of_memory_error_gc_overhead_limit, msg()); |
| |
| msg = java_lang_String::create_from_str("Java heap space: failed reallocation of scalar replaced objects", CHECK_false); |
| java_lang_Throwable::set_message(Universe::_out_of_memory_error_realloc_objects, msg()); |
| |
| msg = java_lang_String::create_from_str("/ by zero", CHECK_false); |
| java_lang_Throwable::set_message(Universe::_arithmetic_exception_instance, msg()); |
| |
| // Setup the array of errors that have preallocated backtrace |
| k = Universe::_out_of_memory_error_java_heap->klass(); |
| assert(k->name() == vmSymbols::java_lang_OutOfMemoryError(), "should be out of memory error"); |
| k_h = instanceKlassHandle(THREAD, k); |
| |
| int len = (StackTraceInThrowable) ? (int)PreallocatedOutOfMemoryErrorCount : 0; |
| Universe::_preallocated_out_of_memory_error_array = oopFactory::new_objArray(k_h(), len, CHECK_false); |
| for (int i=0; i<len; i++) { |
| oop err = k_h->allocate_instance(CHECK_false); |
| Handle err_h = Handle(THREAD, err); |
| java_lang_Throwable::allocate_backtrace(err_h, CHECK_false); |
| Universe::preallocated_out_of_memory_errors()->obj_at_put(i, err_h()); |
| } |
| Universe::_preallocated_out_of_memory_error_avail_count = (jint)len; |
| } |
| |
| |
| // Setup static method for registering finalizers |
| // The finalizer klass must be linked before looking up the method, in |
| // case it needs to get rewritten. |
| SystemDictionary::Finalizer_klass()->link_class(CHECK_false); |
| Method* m = SystemDictionary::Finalizer_klass()->find_method( |
| vmSymbols::register_method_name(), |
| vmSymbols::register_method_signature()); |
| if (m == NULL || !m->is_static()) { |
| tty->print_cr("Unable to link/verify Finalizer.register method"); |
| return false; // initialization failed (cannot throw exception yet) |
| } |
| Universe::_finalizer_register_cache->init( |
| SystemDictionary::Finalizer_klass(), m); |
| |
| SystemDictionary::internal_Unsafe_klass()->link_class(CHECK_false); |
| m = SystemDictionary::internal_Unsafe_klass()->find_method( |
| vmSymbols::throwIllegalAccessError_name(), |
| vmSymbols::void_method_signature()); |
| if (m != NULL && !m->is_static()) { |
| // Note null is okay; this method is used in itables, and if it is null, |
| // then AbstractMethodError is thrown instead. |
| tty->print_cr("Unable to link/verify Unsafe.throwIllegalAccessError method"); |
| return false; // initialization failed (cannot throw exception yet) |
| } |
| Universe::_throw_illegal_access_error_cache->init( |
| SystemDictionary::internal_Unsafe_klass(), m); |
| |
| // Setup method for registering loaded classes in class loader vector |
| SystemDictionary::ClassLoader_klass()->link_class(CHECK_false); |
| m = SystemDictionary::ClassLoader_klass()->find_method(vmSymbols::addClass_name(), vmSymbols::class_void_signature()); |
| if (m == NULL || m->is_static()) { |
| tty->print_cr("Unable to link/verify ClassLoader.addClass method"); |
| return false; // initialization failed (cannot throw exception yet) |
| } |
| Universe::_loader_addClass_cache->init( |
| SystemDictionary::ClassLoader_klass(), m); |
| |
| // Setup method for checking protection domain |
| SystemDictionary::ProtectionDomain_klass()->link_class(CHECK_false); |
| m = SystemDictionary::ProtectionDomain_klass()-> |
| find_method(vmSymbols::impliesCreateAccessControlContext_name(), |
| vmSymbols::void_boolean_signature()); |
| // Allow NULL which should only happen with bootstrapping. |
| if (m != NULL) { |
| if (m->is_static()) { |
| // NoSuchMethodException doesn't actually work because it tries to run the |
| // <init> function before java_lang_Class is linked. Print error and exit. |
| tty->print_cr("ProtectionDomain.impliesCreateAccessControlContext() has the wrong linkage"); |
| return false; // initialization failed |
| } |
| Universe::_pd_implies_cache->init( |
| SystemDictionary::ProtectionDomain_klass(), m); |
| } |
| |
| // Setup method for stack walking |
| InstanceKlass::cast(SystemDictionary::AbstractStackWalker_klass())->link_class(CHECK_false); |
| m = InstanceKlass::cast(SystemDictionary::AbstractStackWalker_klass())-> |
| find_method(vmSymbols::doStackWalk_name(), |
| vmSymbols::doStackWalk_signature()); |
| // Allow NULL which should only happen with bootstrapping. |
| if (m != NULL) { |
| Universe::_do_stack_walk_cache->init( |
| SystemDictionary::AbstractStackWalker_klass(), m); |
| } |
| |
| // This needs to be done before the first scavenge/gc, since |
| // it's an input to soft ref clearing policy. |
| { |
| MutexLocker x(Heap_lock); |
| Universe::update_heap_info_at_gc(); |
| } |
| |
| // ("weak") refs processing infrastructure initialization |
| Universe::heap()->post_initialize(); |
| |
| // Initialize performance counters for metaspaces |
| MetaspaceCounters::initialize_performance_counters(); |
| CompressedClassSpaceCounters::initialize_performance_counters(); |
| |
| MemoryService::add_metaspace_memory_pools(); |
| |
| MemoryService::set_universe_heap(Universe::heap()); |
| #if INCLUDE_CDS |
| SharedClassUtil::initialize(CHECK_false); |
| #endif |
| return true; |
| } |
| |
| |
| void Universe::compute_base_vtable_size() { |
| _base_vtable_size = ClassLoader::compute_Object_vtable(); |
| } |
| |
| void Universe::print_on(outputStream* st) { |
| st->print_cr("Heap"); |
| heap()->print_on(st); |
| } |
| |
| void Universe::print_heap_at_SIGBREAK() { |
| if (PrintHeapAtSIGBREAK) { |
| MutexLocker hl(Heap_lock); |
| print_on(tty); |
| tty->cr(); |
| tty->flush(); |
| } |
| } |
| |
| void Universe::print_heap_before_gc() { |
| LogHandle(gc, heap) log; |
| if (log.is_trace()) { |
| log.trace("Heap before GC invocations=%u (full %u):", heap()->total_collections(), heap()->total_full_collections()); |
| ResourceMark rm; |
| heap()->print_on(log.trace_stream()); |
| } |
| } |
| |
| void Universe::print_heap_after_gc() { |
| LogHandle(gc, heap) log; |
| if (log.is_trace()) { |
| log.trace("Heap after GC invocations=%u (full %u):", heap()->total_collections(), heap()->total_full_collections()); |
| ResourceMark rm; |
| heap()->print_on(log.trace_stream()); |
| } |
| } |
| |
| void Universe::initialize_verify_flags() { |
| verify_flags = 0; |
| const char delimiter[] = " ,"; |
| |
| size_t length = strlen(VerifySubSet); |
| char* subset_list = NEW_C_HEAP_ARRAY(char, length + 1, mtInternal); |
| strncpy(subset_list, VerifySubSet, length + 1); |
| |
| char* token = strtok(subset_list, delimiter); |
| while (token != NULL) { |
| if (strcmp(token, "threads") == 0) { |
| verify_flags |= Verify_Threads; |
| } else if (strcmp(token, "heap") == 0) { |
| verify_flags |= Verify_Heap; |
| } else if (strcmp(token, "symbol_table") == 0) { |
| verify_flags |= Verify_SymbolTable; |
| } else if (strcmp(token, "string_table") == 0) { |
| verify_flags |= Verify_StringTable; |
| } else if (strcmp(token, "codecache") == 0) { |
| verify_flags |= Verify_CodeCache; |
| } else if (strcmp(token, "dictionary") == 0) { |
| verify_flags |= Verify_SystemDictionary; |
| } else if (strcmp(token, "classloader_data_graph") == 0) { |
| verify_flags |= Verify_ClassLoaderDataGraph; |
| } else if (strcmp(token, "metaspace") == 0) { |
| verify_flags |= Verify_MetaspaceAux; |
| } else if (strcmp(token, "jni_handles") == 0) { |
| verify_flags |= Verify_JNIHandles; |
| } else if (strcmp(token, "c-heap") == 0) { |
| verify_flags |= Verify_CHeap; |
| } else if (strcmp(token, "codecache_oops") == 0) { |
| verify_flags |= Verify_CodeCacheOops; |
| } else { |
| vm_exit_during_initialization(err_msg("VerifySubSet: \'%s\' memory sub-system is unknown, please correct it", token)); |
| } |
| token = strtok(NULL, delimiter); |
| } |
| FREE_C_HEAP_ARRAY(char, subset_list); |
| } |
| |
| bool Universe::should_verify_subset(uint subset) { |
| if (verify_flags & subset) { |
| return true; |
| } |
| return false; |
| } |
| |
| void Universe::verify(VerifyOption option, const char* prefix) { |
| // The use of _verify_in_progress is a temporary work around for |
| // 6320749. Don't bother with a creating a class to set and clear |
| // it since it is only used in this method and the control flow is |
| // straight forward. |
| _verify_in_progress = true; |
| |
| COMPILER2_PRESENT( |
| assert(!DerivedPointerTable::is_active(), |
| "DPT should not be active during verification " |
| "(of thread stacks below)"); |
| ) |
| |
| ResourceMark rm; |
| HandleMark hm; // Handles created during verification can be zapped |
| _verify_count++; |
| |
| FormatBuffer<> title("Verifying %s", prefix); |
| GCTraceTime(Info, gc, verify) tm(title.buffer()); |
| if (should_verify_subset(Verify_Threads)) { |
| log_debug(gc, verify)("Threads"); |
| Threads::verify(); |
| } |
| if (should_verify_subset(Verify_Heap)) { |
| log_debug(gc, verify)("Heap"); |
| heap()->verify(option); |
| } |
| if (should_verify_subset(Verify_SymbolTable)) { |
| log_debug(gc, verify)("SymbolTable"); |
| SymbolTable::verify(); |
| } |
| if (should_verify_subset(Verify_StringTable)) { |
| log_debug(gc, verify)("StringTable"); |
| StringTable::verify(); |
| } |
| if (should_verify_subset(Verify_CodeCache)) { |
| { |
| MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); |
| log_debug(gc, verify)("CodeCache"); |
| CodeCache::verify(); |
| } |
| } |
| if (should_verify_subset(Verify_SystemDictionary)) { |
| log_debug(gc, verify)("SystemDictionary"); |
| SystemDictionary::verify(); |
| } |
| #ifndef PRODUCT |
| if (should_verify_subset(Verify_ClassLoaderDataGraph)) { |
| log_debug(gc, verify)("ClassLoaderDataGraph"); |
| ClassLoaderDataGraph::verify(); |
| } |
| #endif |
| if (should_verify_subset(Verify_MetaspaceAux)) { |
| log_debug(gc, verify)("MetaspaceAux"); |
| MetaspaceAux::verify_free_chunks(); |
| } |
| if (should_verify_subset(Verify_JNIHandles)) { |
| log_debug(gc, verify)("JNIHandles"); |
| JNIHandles::verify(); |
| } |
| if (should_verify_subset(Verify_CHeap)) { |
| log_debug(gc, verify)("C-heap"); |
| os::check_heap(); |
| } |
| if (should_verify_subset(Verify_CodeCacheOops)) { |
| log_debug(gc, verify)("CodeCache Oops"); |
| CodeCache::verify_oops(); |
| } |
| |
| _verify_in_progress = false; |
| } |
| |
| |
| #ifndef PRODUCT |
| void Universe::calculate_verify_data(HeapWord* low_boundary, HeapWord* high_boundary) { |
| assert(low_boundary < high_boundary, "bad interval"); |
| |
| // decide which low-order bits we require to be clear: |
| size_t alignSize = MinObjAlignmentInBytes; |
| size_t min_object_size = CollectedHeap::min_fill_size(); |
| |
| // make an inclusive limit: |
| uintptr_t max = (uintptr_t)high_boundary - min_object_size*wordSize; |
| uintptr_t min = (uintptr_t)low_boundary; |
| assert(min < max, "bad interval"); |
| uintptr_t diff = max ^ min; |
| |
| // throw away enough low-order bits to make the diff vanish |
| uintptr_t mask = (uintptr_t)(-1); |
| while ((mask & diff) != 0) |
| mask <<= 1; |
| uintptr_t bits = (min & mask); |
| assert(bits == (max & mask), "correct mask"); |
| // check an intermediate value between min and max, just to make sure: |
| assert(bits == ((min + (max-min)/2) & mask), "correct mask"); |
| |
| // require address alignment, too: |
| mask |= (alignSize - 1); |
| |
| if (!(_verify_oop_mask == 0 && _verify_oop_bits == (uintptr_t)-1)) { |
| assert(_verify_oop_mask == mask && _verify_oop_bits == bits, "mask stability"); |
| } |
| _verify_oop_mask = mask; |
| _verify_oop_bits = bits; |
| } |
| |
| // Oop verification (see MacroAssembler::verify_oop) |
| |
| uintptr_t Universe::verify_oop_mask() { |
| MemRegion m = heap()->reserved_region(); |
| calculate_verify_data(m.start(), m.end()); |
| return _verify_oop_mask; |
| } |
| |
| uintptr_t Universe::verify_oop_bits() { |
| MemRegion m = heap()->reserved_region(); |
| calculate_verify_data(m.start(), m.end()); |
| return _verify_oop_bits; |
| } |
| |
| uintptr_t Universe::verify_mark_mask() { |
| return markOopDesc::lock_mask_in_place; |
| } |
| |
| uintptr_t Universe::verify_mark_bits() { |
| intptr_t mask = verify_mark_mask(); |
| intptr_t bits = (intptr_t)markOopDesc::prototype(); |
| assert((bits & ~mask) == 0, "no stray header bits"); |
| return bits; |
| } |
| #endif // PRODUCT |
| |
| |
| void Universe::compute_verify_oop_data() { |
| verify_oop_mask(); |
| verify_oop_bits(); |
| verify_mark_mask(); |
| verify_mark_bits(); |
| } |
| |
| |
| void LatestMethodCache::init(Klass* k, Method* m) { |
| if (!UseSharedSpaces) { |
| _klass = k; |
| } |
| #ifndef PRODUCT |
| else { |
| // sharing initilization should have already set up _klass |
| assert(_klass != NULL, "just checking"); |
| } |
| #endif |
| |
| _method_idnum = m->method_idnum(); |
| assert(_method_idnum >= 0, "sanity check"); |
| } |
| |
| |
| Method* LatestMethodCache::get_method() { |
| if (klass() == NULL) return NULL; |
| InstanceKlass* ik = InstanceKlass::cast(klass()); |
| Method* m = ik->method_with_idnum(method_idnum()); |
| assert(m != NULL, "sanity check"); |
| return m; |
| } |
| |
| |
| #ifdef ASSERT |
| // Release dummy object(s) at bottom of heap |
| bool Universe::release_fullgc_alot_dummy() { |
| MutexLocker ml(FullGCALot_lock); |
| if (_fullgc_alot_dummy_array != NULL) { |
| if (_fullgc_alot_dummy_next >= _fullgc_alot_dummy_array->length()) { |
| // No more dummies to release, release entire array instead |
| _fullgc_alot_dummy_array = NULL; |
| return false; |
| } |
| if (!UseConcMarkSweepGC) { |
| // Release dummy at bottom of old generation |
| _fullgc_alot_dummy_array->obj_at_put(_fullgc_alot_dummy_next++, NULL); |
| } |
| // Release dummy at bottom of permanent generation |
| _fullgc_alot_dummy_array->obj_at_put(_fullgc_alot_dummy_next++, NULL); |
| } |
| return true; |
| } |
| |
| #endif // ASSERT |