aoqi@0: /* aoqi@0: * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved. aoqi@0: * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. aoqi@0: * aoqi@0: * This code is free software; you can redistribute it and/or modify it aoqi@0: * under the terms of the GNU General Public License version 2 only, as aoqi@0: * published by the Free Software Foundation. aoqi@0: * aoqi@0: * This code is distributed in the hope that it will be useful, but WITHOUT aoqi@0: * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or aoqi@0: * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License aoqi@0: * version 2 for more details (a copy is included in the LICENSE file that aoqi@0: * accompanied this code). aoqi@0: * aoqi@0: * You should have received a copy of the GNU General Public License version aoqi@0: * 2 along with this work; if not, write to the Free Software Foundation, aoqi@0: * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. aoqi@0: * aoqi@0: * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA aoqi@0: * or visit www.oracle.com if you need additional information or have any aoqi@0: * questions. aoqi@0: * aoqi@0: */ aoqi@0: aoqi@0: #include "precompiled.hpp" aoqi@0: #include "classfile/classLoader.hpp" aoqi@0: #include "classfile/classLoaderData.hpp" aoqi@0: #include "classfile/javaClasses.hpp" iklam@7089: #if INCLUDE_CDS iklam@7089: #include "classfile/sharedClassUtil.hpp" iklam@7089: #endif aoqi@0: #include "classfile/symbolTable.hpp" aoqi@0: #include "classfile/systemDictionary.hpp" aoqi@0: #include "classfile/vmSymbols.hpp" aoqi@0: #include "code/codeCache.hpp" aoqi@0: #include "code/dependencies.hpp" aoqi@0: #include "gc_interface/collectedHeap.inline.hpp" aoqi@0: #include "interpreter/interpreter.hpp" aoqi@0: #include "memory/cardTableModRefBS.hpp" iklam@7089: #include "memory/filemap.hpp" aoqi@0: #include "memory/gcLocker.inline.hpp" aoqi@0: #include "memory/genCollectedHeap.hpp" aoqi@0: #include "memory/genRemSet.hpp" aoqi@0: #include "memory/generation.hpp" aoqi@0: #include "memory/metadataFactory.hpp" aoqi@0: #include "memory/metaspaceShared.hpp" aoqi@0: #include "memory/oopFactory.hpp" aoqi@0: #include "memory/space.hpp" aoqi@0: #include "memory/universe.hpp" aoqi@0: #include "memory/universe.inline.hpp" aoqi@0: #include "oops/constantPool.hpp" aoqi@0: #include "oops/instanceClassLoaderKlass.hpp" aoqi@0: #include "oops/instanceKlass.hpp" aoqi@0: #include "oops/instanceMirrorKlass.hpp" aoqi@0: #include "oops/instanceRefKlass.hpp" aoqi@0: #include "oops/oop.inline.hpp" aoqi@0: #include "oops/typeArrayKlass.hpp" aoqi@0: #include "prims/jvmtiRedefineClassesTrace.hpp" aoqi@0: #include "runtime/arguments.hpp" aoqi@0: #include "runtime/deoptimization.hpp" aoqi@0: #include "runtime/fprofiler.hpp" aoqi@0: #include "runtime/handles.inline.hpp" aoqi@0: #include "runtime/init.hpp" aoqi@0: #include "runtime/java.hpp" aoqi@0: #include "runtime/javaCalls.hpp" aoqi@0: #include "runtime/sharedRuntime.hpp" aoqi@0: #include "runtime/synchronizer.hpp" aoqi@0: #include "runtime/thread.inline.hpp" aoqi@0: #include "runtime/timer.hpp" aoqi@0: #include "runtime/vm_operations.hpp" aoqi@0: #include "services/memoryService.hpp" aoqi@0: #include "utilities/copy.hpp" aoqi@0: #include "utilities/events.hpp" aoqi@0: #include "utilities/hashtable.inline.hpp" aoqi@0: #include "utilities/preserveException.hpp" aoqi@0: #include "utilities/macros.hpp" aoqi@0: #if INCLUDE_ALL_GCS aoqi@0: #include "gc_implementation/concurrentMarkSweep/cmsAdaptiveSizePolicy.hpp" aoqi@0: #include "gc_implementation/concurrentMarkSweep/cmsCollectorPolicy.hpp" aoqi@0: #include "gc_implementation/g1/g1CollectedHeap.inline.hpp" jwilhelm@7369: #include "gc_implementation/g1/g1CollectorPolicy_ext.hpp" aoqi@0: #include "gc_implementation/parallelScavenge/parallelScavengeHeap.hpp" aoqi@0: #endif // INCLUDE_ALL_GCS aoqi@0: aoqi@0: PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC aoqi@0: aoqi@0: // Known objects aoqi@0: Klass* Universe::_boolArrayKlassObj = NULL; aoqi@0: Klass* Universe::_byteArrayKlassObj = NULL; aoqi@0: Klass* Universe::_charArrayKlassObj = NULL; aoqi@0: Klass* Universe::_intArrayKlassObj = NULL; aoqi@0: Klass* Universe::_shortArrayKlassObj = NULL; aoqi@0: Klass* Universe::_longArrayKlassObj = NULL; aoqi@0: Klass* Universe::_singleArrayKlassObj = NULL; aoqi@0: Klass* Universe::_doubleArrayKlassObj = NULL; aoqi@0: Klass* Universe::_typeArrayKlassObjs[T_VOID+1] = { NULL /*, NULL...*/ }; aoqi@0: Klass* Universe::_objectArrayKlassObj = NULL; aoqi@0: oop Universe::_int_mirror = NULL; aoqi@0: oop Universe::_float_mirror = NULL; aoqi@0: oop Universe::_double_mirror = NULL; aoqi@0: oop Universe::_byte_mirror = NULL; aoqi@0: oop Universe::_bool_mirror = NULL; aoqi@0: oop Universe::_char_mirror = NULL; aoqi@0: oop Universe::_long_mirror = NULL; aoqi@0: oop Universe::_short_mirror = NULL; aoqi@0: oop Universe::_void_mirror = NULL; aoqi@0: oop Universe::_mirrors[T_VOID+1] = { NULL /*, NULL...*/ }; aoqi@0: oop Universe::_main_thread_group = NULL; aoqi@0: oop Universe::_system_thread_group = NULL; aoqi@0: objArrayOop Universe::_the_empty_class_klass_array = NULL; aoqi@0: Array* Universe::_the_array_interfaces_array = NULL; aoqi@0: oop Universe::_the_null_string = NULL; aoqi@0: oop Universe::_the_min_jint_string = NULL; aoqi@0: LatestMethodCache* Universe::_finalizer_register_cache = NULL; aoqi@0: LatestMethodCache* Universe::_loader_addClass_cache = NULL; aoqi@0: LatestMethodCache* Universe::_pd_implies_cache = NULL; aoqi@0: oop Universe::_out_of_memory_error_java_heap = NULL; aoqi@0: oop Universe::_out_of_memory_error_metaspace = NULL; aoqi@0: oop Universe::_out_of_memory_error_class_metaspace = NULL; aoqi@0: oop Universe::_out_of_memory_error_array_size = NULL; aoqi@0: oop Universe::_out_of_memory_error_gc_overhead_limit = NULL; roland@7419: oop Universe::_out_of_memory_error_realloc_objects = NULL; aoqi@0: objArrayOop Universe::_preallocated_out_of_memory_error_array = NULL; aoqi@0: volatile jint Universe::_preallocated_out_of_memory_error_avail_count = 0; aoqi@0: bool Universe::_verify_in_progress = false; aoqi@0: oop Universe::_null_ptr_exception_instance = NULL; aoqi@0: oop Universe::_arithmetic_exception_instance = NULL; aoqi@0: oop Universe::_virtual_machine_error_instance = NULL; aoqi@0: oop Universe::_vm_exception = NULL; jcoomes@7164: oop Universe::_allocation_context_notification_obj = NULL; jcoomes@7164: aoqi@0: Method* Universe::_throw_illegal_access_error = NULL; aoqi@0: Array* Universe::_the_empty_int_array = NULL; aoqi@0: Array* Universe::_the_empty_short_array = NULL; aoqi@0: Array* Universe::_the_empty_klass_array = NULL; aoqi@0: Array* Universe::_the_empty_method_array = NULL; aoqi@0: aoqi@0: // These variables are guarded by FullGCALot_lock. aoqi@0: debug_only(objArrayOop Universe::_fullgc_alot_dummy_array = NULL;) aoqi@0: debug_only(int Universe::_fullgc_alot_dummy_next = 0;) aoqi@0: aoqi@0: // Heap aoqi@0: int Universe::_verify_count = 0; aoqi@0: aoqi@0: int Universe::_base_vtable_size = 0; aoqi@0: bool Universe::_bootstrapping = false; aoqi@0: bool Universe::_fully_initialized = false; aoqi@0: aoqi@0: size_t Universe::_heap_capacity_at_last_gc; aoqi@0: size_t Universe::_heap_used_at_last_gc = 0; aoqi@0: aoqi@0: CollectedHeap* Universe::_collectedHeap = NULL; aoqi@0: aoqi@0: NarrowPtrStruct Universe::_narrow_oop = { NULL, 0, true }; aoqi@0: NarrowPtrStruct Universe::_narrow_klass = { NULL, 0, true }; aoqi@0: address Universe::_narrow_ptrs_base; aoqi@0: aoqi@0: void Universe::basic_type_classes_do(void f(Klass*)) { aoqi@0: f(boolArrayKlassObj()); aoqi@0: f(byteArrayKlassObj()); aoqi@0: f(charArrayKlassObj()); aoqi@0: f(intArrayKlassObj()); aoqi@0: f(shortArrayKlassObj()); aoqi@0: f(longArrayKlassObj()); aoqi@0: f(singleArrayKlassObj()); aoqi@0: f(doubleArrayKlassObj()); aoqi@0: } aoqi@0: aoqi@0: void Universe::oops_do(OopClosure* f, bool do_all) { aoqi@0: aoqi@0: f->do_oop((oop*) &_int_mirror); aoqi@0: f->do_oop((oop*) &_float_mirror); aoqi@0: f->do_oop((oop*) &_double_mirror); aoqi@0: f->do_oop((oop*) &_byte_mirror); aoqi@0: f->do_oop((oop*) &_bool_mirror); aoqi@0: f->do_oop((oop*) &_char_mirror); aoqi@0: f->do_oop((oop*) &_long_mirror); aoqi@0: f->do_oop((oop*) &_short_mirror); aoqi@0: f->do_oop((oop*) &_void_mirror); aoqi@0: aoqi@0: for (int i = T_BOOLEAN; i < T_VOID+1; i++) { aoqi@0: f->do_oop((oop*) &_mirrors[i]); aoqi@0: } aoqi@0: assert(_mirrors[0] == NULL && _mirrors[T_BOOLEAN - 1] == NULL, "checking"); aoqi@0: aoqi@0: f->do_oop((oop*)&_the_empty_class_klass_array); aoqi@0: f->do_oop((oop*)&_the_null_string); aoqi@0: f->do_oop((oop*)&_the_min_jint_string); aoqi@0: f->do_oop((oop*)&_out_of_memory_error_java_heap); aoqi@0: f->do_oop((oop*)&_out_of_memory_error_metaspace); aoqi@0: f->do_oop((oop*)&_out_of_memory_error_class_metaspace); aoqi@0: f->do_oop((oop*)&_out_of_memory_error_array_size); aoqi@0: f->do_oop((oop*)&_out_of_memory_error_gc_overhead_limit); roland@7419: f->do_oop((oop*)&_out_of_memory_error_realloc_objects); aoqi@0: f->do_oop((oop*)&_preallocated_out_of_memory_error_array); aoqi@0: f->do_oop((oop*)&_null_ptr_exception_instance); aoqi@0: f->do_oop((oop*)&_arithmetic_exception_instance); aoqi@0: f->do_oop((oop*)&_virtual_machine_error_instance); aoqi@0: f->do_oop((oop*)&_main_thread_group); aoqi@0: f->do_oop((oop*)&_system_thread_group); aoqi@0: f->do_oop((oop*)&_vm_exception); jcoomes@7164: f->do_oop((oop*)&_allocation_context_notification_obj); aoqi@0: debug_only(f->do_oop((oop*)&_fullgc_alot_dummy_array);) aoqi@0: } aoqi@0: aoqi@0: // Serialize metadata in and out of CDS archive, not oops. aoqi@0: void Universe::serialize(SerializeClosure* f, bool do_all) { aoqi@0: aoqi@0: f->do_ptr((void**)&_boolArrayKlassObj); aoqi@0: f->do_ptr((void**)&_byteArrayKlassObj); aoqi@0: f->do_ptr((void**)&_charArrayKlassObj); aoqi@0: f->do_ptr((void**)&_intArrayKlassObj); aoqi@0: f->do_ptr((void**)&_shortArrayKlassObj); aoqi@0: f->do_ptr((void**)&_longArrayKlassObj); aoqi@0: f->do_ptr((void**)&_singleArrayKlassObj); aoqi@0: f->do_ptr((void**)&_doubleArrayKlassObj); aoqi@0: f->do_ptr((void**)&_objectArrayKlassObj); aoqi@0: aoqi@0: { aoqi@0: for (int i = 0; i < T_VOID+1; i++) { aoqi@0: if (_typeArrayKlassObjs[i] != NULL) { aoqi@0: assert(i >= T_BOOLEAN, "checking"); aoqi@0: f->do_ptr((void**)&_typeArrayKlassObjs[i]); aoqi@0: } else if (do_all) { aoqi@0: f->do_ptr((void**)&_typeArrayKlassObjs[i]); aoqi@0: } aoqi@0: } aoqi@0: } aoqi@0: aoqi@0: f->do_ptr((void**)&_the_array_interfaces_array); aoqi@0: f->do_ptr((void**)&_the_empty_int_array); aoqi@0: f->do_ptr((void**)&_the_empty_short_array); aoqi@0: f->do_ptr((void**)&_the_empty_method_array); aoqi@0: f->do_ptr((void**)&_the_empty_klass_array); aoqi@0: _finalizer_register_cache->serialize(f); aoqi@0: _loader_addClass_cache->serialize(f); aoqi@0: _pd_implies_cache->serialize(f); aoqi@0: } aoqi@0: aoqi@0: void Universe::check_alignment(uintx size, uintx alignment, const char* name) { aoqi@0: if (size < alignment || size % alignment != 0) { aoqi@0: vm_exit_during_initialization( aoqi@0: err_msg("Size of %s (" UINTX_FORMAT " bytes) must be aligned to " UINTX_FORMAT " bytes", name, size, alignment)); aoqi@0: } aoqi@0: } aoqi@0: aoqi@0: void initialize_basic_type_klass(Klass* k, TRAPS) { aoqi@0: Klass* ok = SystemDictionary::Object_klass(); aoqi@0: if (UseSharedSpaces) { iklam@7089: ClassLoaderData* loader_data = ClassLoaderData::the_null_class_loader_data(); aoqi@0: assert(k->super() == ok, "u3"); iklam@7089: k->restore_unshareable_info(loader_data, Handle(), CHECK); aoqi@0: } else { aoqi@0: k->initialize_supers(ok, CHECK); aoqi@0: } aoqi@0: k->append_to_sibling_list(); aoqi@0: } aoqi@0: aoqi@0: void Universe::genesis(TRAPS) { aoqi@0: ResourceMark rm; aoqi@0: aoqi@0: { FlagSetting fs(_bootstrapping, true); aoqi@0: aoqi@0: { MutexLocker mc(Compile_lock); aoqi@0: aoqi@0: // determine base vtable size; without that we cannot create the array klasses aoqi@0: compute_base_vtable_size(); aoqi@0: aoqi@0: if (!UseSharedSpaces) { aoqi@0: _boolArrayKlassObj = TypeArrayKlass::create_klass(T_BOOLEAN, sizeof(jboolean), CHECK); aoqi@0: _charArrayKlassObj = TypeArrayKlass::create_klass(T_CHAR, sizeof(jchar), CHECK); aoqi@0: _singleArrayKlassObj = TypeArrayKlass::create_klass(T_FLOAT, sizeof(jfloat), CHECK); aoqi@0: _doubleArrayKlassObj = TypeArrayKlass::create_klass(T_DOUBLE, sizeof(jdouble), CHECK); aoqi@0: _byteArrayKlassObj = TypeArrayKlass::create_klass(T_BYTE, sizeof(jbyte), CHECK); aoqi@0: _shortArrayKlassObj = TypeArrayKlass::create_klass(T_SHORT, sizeof(jshort), CHECK); aoqi@0: _intArrayKlassObj = TypeArrayKlass::create_klass(T_INT, sizeof(jint), CHECK); aoqi@0: _longArrayKlassObj = TypeArrayKlass::create_klass(T_LONG, sizeof(jlong), CHECK); aoqi@0: aoqi@0: _typeArrayKlassObjs[T_BOOLEAN] = _boolArrayKlassObj; aoqi@0: _typeArrayKlassObjs[T_CHAR] = _charArrayKlassObj; aoqi@0: _typeArrayKlassObjs[T_FLOAT] = _singleArrayKlassObj; aoqi@0: _typeArrayKlassObjs[T_DOUBLE] = _doubleArrayKlassObj; aoqi@0: _typeArrayKlassObjs[T_BYTE] = _byteArrayKlassObj; aoqi@0: _typeArrayKlassObjs[T_SHORT] = _shortArrayKlassObj; aoqi@0: _typeArrayKlassObjs[T_INT] = _intArrayKlassObj; aoqi@0: _typeArrayKlassObjs[T_LONG] = _longArrayKlassObj; aoqi@0: aoqi@0: ClassLoaderData* null_cld = ClassLoaderData::the_null_class_loader_data(); aoqi@0: aoqi@0: _the_array_interfaces_array = MetadataFactory::new_array(null_cld, 2, NULL, CHECK); aoqi@0: _the_empty_int_array = MetadataFactory::new_array(null_cld, 0, CHECK); aoqi@0: _the_empty_short_array = MetadataFactory::new_array(null_cld, 0, CHECK); aoqi@0: _the_empty_method_array = MetadataFactory::new_array(null_cld, 0, CHECK); aoqi@0: _the_empty_klass_array = MetadataFactory::new_array(null_cld, 0, CHECK); aoqi@0: } aoqi@0: } aoqi@0: aoqi@0: vmSymbols::initialize(CHECK); aoqi@0: aoqi@0: SystemDictionary::initialize(CHECK); aoqi@0: aoqi@0: Klass* ok = SystemDictionary::Object_klass(); aoqi@0: aoqi@0: _the_null_string = StringTable::intern("null", CHECK); aoqi@0: _the_min_jint_string = StringTable::intern("-2147483648", CHECK); aoqi@0: aoqi@0: if (UseSharedSpaces) { aoqi@0: // Verify shared interfaces array. aoqi@0: assert(_the_array_interfaces_array->at(0) == aoqi@0: SystemDictionary::Cloneable_klass(), "u3"); aoqi@0: assert(_the_array_interfaces_array->at(1) == aoqi@0: SystemDictionary::Serializable_klass(), "u3"); aoqi@0: } else { aoqi@0: // Set up shared interfaces array. (Do this before supers are set up.) aoqi@0: _the_array_interfaces_array->at_put(0, SystemDictionary::Cloneable_klass()); aoqi@0: _the_array_interfaces_array->at_put(1, SystemDictionary::Serializable_klass()); aoqi@0: } aoqi@0: aoqi@0: initialize_basic_type_klass(boolArrayKlassObj(), CHECK); aoqi@0: initialize_basic_type_klass(charArrayKlassObj(), CHECK); aoqi@0: initialize_basic_type_klass(singleArrayKlassObj(), CHECK); aoqi@0: initialize_basic_type_klass(doubleArrayKlassObj(), CHECK); aoqi@0: initialize_basic_type_klass(byteArrayKlassObj(), CHECK); aoqi@0: initialize_basic_type_klass(shortArrayKlassObj(), CHECK); aoqi@0: initialize_basic_type_klass(intArrayKlassObj(), CHECK); aoqi@0: initialize_basic_type_klass(longArrayKlassObj(), CHECK); aoqi@0: } // end of core bootstrapping aoqi@0: aoqi@0: // Maybe this could be lifted up now that object array can be initialized aoqi@0: // during the bootstrapping. aoqi@0: aoqi@0: // OLD aoqi@0: // Initialize _objectArrayKlass after core bootstraping to make aoqi@0: // sure the super class is set up properly for _objectArrayKlass. aoqi@0: // --- aoqi@0: // NEW aoqi@0: // Since some of the old system object arrays have been converted to aoqi@0: // ordinary object arrays, _objectArrayKlass will be loaded when aoqi@0: // SystemDictionary::initialize(CHECK); is run. See the extra check aoqi@0: // for Object_klass_loaded in objArrayKlassKlass::allocate_objArray_klass_impl. aoqi@0: _objectArrayKlassObj = InstanceKlass:: aoqi@0: cast(SystemDictionary::Object_klass())->array_klass(1, CHECK); aoqi@0: // OLD aoqi@0: // Add the class to the class hierarchy manually to make sure that aoqi@0: // its vtable is initialized after core bootstrapping is completed. aoqi@0: // --- aoqi@0: // New aoqi@0: // Have already been initialized. aoqi@0: _objectArrayKlassObj->append_to_sibling_list(); aoqi@0: aoqi@0: // Compute is_jdk version flags. aoqi@0: // Only 1.3 or later has the java.lang.Shutdown class. aoqi@0: // Only 1.4 or later has the java.lang.CharSequence interface. aoqi@0: // Only 1.5 or later has the java.lang.management.MemoryUsage class. aoqi@0: if (JDK_Version::is_partially_initialized()) { aoqi@0: uint8_t jdk_version; aoqi@0: Klass* k = SystemDictionary::resolve_or_null( aoqi@0: vmSymbols::java_lang_management_MemoryUsage(), THREAD); aoqi@0: CLEAR_PENDING_EXCEPTION; // ignore exceptions aoqi@0: if (k == NULL) { aoqi@0: k = SystemDictionary::resolve_or_null( aoqi@0: vmSymbols::java_lang_CharSequence(), THREAD); aoqi@0: CLEAR_PENDING_EXCEPTION; // ignore exceptions aoqi@0: if (k == NULL) { aoqi@0: k = SystemDictionary::resolve_or_null( aoqi@0: vmSymbols::java_lang_Shutdown(), THREAD); aoqi@0: CLEAR_PENDING_EXCEPTION; // ignore exceptions aoqi@0: if (k == NULL) { aoqi@0: jdk_version = 2; aoqi@0: } else { aoqi@0: jdk_version = 3; aoqi@0: } aoqi@0: } else { aoqi@0: jdk_version = 4; aoqi@0: } aoqi@0: } else { aoqi@0: jdk_version = 5; aoqi@0: } aoqi@0: JDK_Version::fully_initialize(jdk_version); aoqi@0: } aoqi@0: aoqi@0: #ifdef ASSERT aoqi@0: if (FullGCALot) { aoqi@0: // Allocate an array of dummy objects. aoqi@0: // We'd like these to be at the bottom of the old generation, aoqi@0: // so that when we free one and then collect, aoqi@0: // (almost) the whole heap moves aoqi@0: // and we find out if we actually update all the oops correctly. aoqi@0: // But we can't allocate directly in the old generation, aoqi@0: // so we allocate wherever, and hope that the first collection aoqi@0: // moves these objects to the bottom of the old generation. aoqi@0: // We can allocate directly in the permanent generation, so we do. aoqi@0: int size; aoqi@0: if (UseConcMarkSweepGC) { aoqi@0: warning("Using +FullGCALot with concurrent mark sweep gc " aoqi@0: "will not force all objects to relocate"); aoqi@0: size = FullGCALotDummies; aoqi@0: } else { aoqi@0: size = FullGCALotDummies * 2; aoqi@0: } aoqi@0: objArrayOop naked_array = oopFactory::new_objArray(SystemDictionary::Object_klass(), size, CHECK); aoqi@0: objArrayHandle dummy_array(THREAD, naked_array); aoqi@0: int i = 0; aoqi@0: while (i < size) { aoqi@0: // Allocate dummy in old generation aoqi@0: oop dummy = InstanceKlass::cast(SystemDictionary::Object_klass())->allocate_instance(CHECK); aoqi@0: dummy_array->obj_at_put(i++, dummy); aoqi@0: } aoqi@0: { aoqi@0: // Only modify the global variable inside the mutex. aoqi@0: // If we had a race to here, the other dummy_array instances aoqi@0: // and their elements just get dropped on the floor, which is fine. aoqi@0: MutexLocker ml(FullGCALot_lock); aoqi@0: if (_fullgc_alot_dummy_array == NULL) { aoqi@0: _fullgc_alot_dummy_array = dummy_array(); aoqi@0: } aoqi@0: } aoqi@0: assert(i == _fullgc_alot_dummy_array->length(), "just checking"); aoqi@0: } aoqi@0: #endif aoqi@0: aoqi@0: // Initialize dependency array for null class loader aoqi@0: ClassLoaderData::the_null_class_loader_data()->init_dependencies(CHECK); aoqi@0: aoqi@0: } aoqi@0: aoqi@0: // CDS support for patching vtables in metadata in the shared archive. aoqi@0: // All types inherited from Metadata have vtables, but not types inherited aoqi@0: // from MetaspaceObj, because the latter does not have virtual functions. aoqi@0: // If the metadata type has a vtable, it cannot be shared in the read-only aoqi@0: // section of the CDS archive, because the vtable pointer is patched. aoqi@0: static inline void add_vtable(void** list, int* n, void* o, int count) { aoqi@0: guarantee((*n) < count, "vtable list too small"); aoqi@0: void* vtable = dereference_vptr(o); aoqi@0: assert(*(void**)(vtable) != NULL, "invalid vtable"); aoqi@0: list[(*n)++] = vtable; aoqi@0: } aoqi@0: aoqi@0: void Universe::init_self_patching_vtbl_list(void** list, int count) { aoqi@0: int n = 0; aoqi@0: { InstanceKlass o; add_vtable(list, &n, &o, count); } aoqi@0: { InstanceClassLoaderKlass o; add_vtable(list, &n, &o, count); } aoqi@0: { InstanceMirrorKlass o; add_vtable(list, &n, &o, count); } aoqi@0: { InstanceRefKlass o; add_vtable(list, &n, &o, count); } aoqi@0: { TypeArrayKlass o; add_vtable(list, &n, &o, count); } aoqi@0: { ObjArrayKlass o; add_vtable(list, &n, &o, count); } aoqi@0: { Method o; add_vtable(list, &n, &o, count); } aoqi@0: { ConstantPool o; add_vtable(list, &n, &o, count); } aoqi@0: } aoqi@0: aoqi@0: void Universe::initialize_basic_type_mirrors(TRAPS) { aoqi@0: assert(_int_mirror==NULL, "basic type mirrors already initialized"); aoqi@0: _int_mirror = aoqi@0: java_lang_Class::create_basic_type_mirror("int", T_INT, CHECK); aoqi@0: _float_mirror = aoqi@0: java_lang_Class::create_basic_type_mirror("float", T_FLOAT, CHECK); aoqi@0: _double_mirror = aoqi@0: java_lang_Class::create_basic_type_mirror("double", T_DOUBLE, CHECK); aoqi@0: _byte_mirror = aoqi@0: java_lang_Class::create_basic_type_mirror("byte", T_BYTE, CHECK); aoqi@0: _bool_mirror = aoqi@0: java_lang_Class::create_basic_type_mirror("boolean",T_BOOLEAN, CHECK); aoqi@0: _char_mirror = aoqi@0: java_lang_Class::create_basic_type_mirror("char", T_CHAR, CHECK); aoqi@0: _long_mirror = aoqi@0: java_lang_Class::create_basic_type_mirror("long", T_LONG, CHECK); aoqi@0: _short_mirror = aoqi@0: java_lang_Class::create_basic_type_mirror("short", T_SHORT, CHECK); aoqi@0: _void_mirror = aoqi@0: java_lang_Class::create_basic_type_mirror("void", T_VOID, CHECK); aoqi@0: aoqi@0: _mirrors[T_INT] = _int_mirror; aoqi@0: _mirrors[T_FLOAT] = _float_mirror; aoqi@0: _mirrors[T_DOUBLE] = _double_mirror; aoqi@0: _mirrors[T_BYTE] = _byte_mirror; aoqi@0: _mirrors[T_BOOLEAN] = _bool_mirror; aoqi@0: _mirrors[T_CHAR] = _char_mirror; aoqi@0: _mirrors[T_LONG] = _long_mirror; aoqi@0: _mirrors[T_SHORT] = _short_mirror; aoqi@0: _mirrors[T_VOID] = _void_mirror; aoqi@0: //_mirrors[T_OBJECT] = InstanceKlass::cast(_object_klass)->java_mirror(); aoqi@0: //_mirrors[T_ARRAY] = InstanceKlass::cast(_object_klass)->java_mirror(); aoqi@0: } aoqi@0: aoqi@0: void Universe::fixup_mirrors(TRAPS) { aoqi@0: // Bootstrap problem: all classes gets a mirror (java.lang.Class instance) assigned eagerly, aoqi@0: // but we cannot do that for classes created before java.lang.Class is loaded. Here we simply aoqi@0: // walk over permanent objects created so far (mostly classes) and fixup their mirrors. Note aoqi@0: // that the number of objects allocated at this point is very small. aoqi@0: assert(SystemDictionary::Class_klass_loaded(), "java.lang.Class should be loaded"); aoqi@0: HandleMark hm(THREAD); aoqi@0: // Cache the start of the static fields aoqi@0: InstanceMirrorKlass::init_offset_of_static_fields(); aoqi@0: aoqi@0: GrowableArray * list = java_lang_Class::fixup_mirror_list(); aoqi@0: int list_length = list->length(); aoqi@0: for (int i = 0; i < list_length; i++) { aoqi@0: Klass* k = list->at(i); aoqi@0: assert(k->is_klass(), "List should only hold classes"); aoqi@0: EXCEPTION_MARK; aoqi@0: KlassHandle kh(THREAD, k); aoqi@0: java_lang_Class::fixup_mirror(kh, CATCH); aoqi@0: } aoqi@0: delete java_lang_Class::fixup_mirror_list(); aoqi@0: java_lang_Class::set_fixup_mirror_list(NULL); aoqi@0: } aoqi@0: aoqi@0: static bool has_run_finalizers_on_exit = false; aoqi@0: aoqi@0: void Universe::run_finalizers_on_exit() { aoqi@0: if (has_run_finalizers_on_exit) return; aoqi@0: has_run_finalizers_on_exit = true; aoqi@0: aoqi@0: // Called on VM exit. This ought to be run in a separate thread. aoqi@0: if (TraceReferenceGC) tty->print_cr("Callback to run finalizers on exit"); aoqi@0: { aoqi@0: PRESERVE_EXCEPTION_MARK; aoqi@0: KlassHandle finalizer_klass(THREAD, SystemDictionary::Finalizer_klass()); aoqi@0: JavaValue result(T_VOID); aoqi@0: JavaCalls::call_static( aoqi@0: &result, aoqi@0: finalizer_klass, aoqi@0: vmSymbols::run_finalizers_on_exit_name(), aoqi@0: vmSymbols::void_method_signature(), aoqi@0: THREAD aoqi@0: ); aoqi@0: // Ignore any pending exceptions aoqi@0: CLEAR_PENDING_EXCEPTION; aoqi@0: } aoqi@0: } aoqi@0: aoqi@0: aoqi@0: // initialize_vtable could cause gc if aoqi@0: // 1) we specified true to initialize_vtable and aoqi@0: // 2) this ran after gc was enabled aoqi@0: // In case those ever change we use handles for oops aoqi@0: void Universe::reinitialize_vtable_of(KlassHandle k_h, TRAPS) { aoqi@0: // init vtable of k and all subclasses aoqi@0: Klass* ko = k_h(); aoqi@0: klassVtable* vt = ko->vtable(); aoqi@0: if (vt) vt->initialize_vtable(false, CHECK); aoqi@0: if (ko->oop_is_instance()) { aoqi@0: InstanceKlass* ik = (InstanceKlass*)ko; aoqi@0: for (KlassHandle s_h(THREAD, ik->subklass()); aoqi@0: s_h() != NULL; aoqi@0: s_h = KlassHandle(THREAD, s_h()->next_sibling())) { aoqi@0: reinitialize_vtable_of(s_h, CHECK); aoqi@0: } aoqi@0: } aoqi@0: } aoqi@0: aoqi@0: aoqi@0: void initialize_itable_for_klass(Klass* k, TRAPS) { aoqi@0: InstanceKlass::cast(k)->itable()->initialize_itable(false, CHECK); aoqi@0: } aoqi@0: aoqi@0: aoqi@0: void Universe::reinitialize_itables(TRAPS) { aoqi@0: SystemDictionary::classes_do(initialize_itable_for_klass, CHECK); aoqi@0: aoqi@0: } aoqi@0: aoqi@0: aoqi@0: bool Universe::on_page_boundary(void* addr) { aoqi@0: return ((uintptr_t) addr) % os::vm_page_size() == 0; aoqi@0: } aoqi@0: aoqi@0: aoqi@0: bool Universe::should_fill_in_stack_trace(Handle throwable) { aoqi@0: // never attempt to fill in the stack trace of preallocated errors that do not have aoqi@0: // backtrace. These errors are kept alive forever and may be "re-used" when all aoqi@0: // preallocated errors with backtrace have been consumed. Also need to avoid aoqi@0: // a potential loop which could happen if an out of memory occurs when attempting aoqi@0: // to allocate the backtrace. aoqi@0: return ((throwable() != Universe::_out_of_memory_error_java_heap) && aoqi@0: (throwable() != Universe::_out_of_memory_error_metaspace) && aoqi@0: (throwable() != Universe::_out_of_memory_error_class_metaspace) && aoqi@0: (throwable() != Universe::_out_of_memory_error_array_size) && roland@7419: (throwable() != Universe::_out_of_memory_error_gc_overhead_limit) && roland@7419: (throwable() != Universe::_out_of_memory_error_realloc_objects)); aoqi@0: } aoqi@0: aoqi@0: aoqi@0: oop Universe::gen_out_of_memory_error(oop default_err) { aoqi@0: // generate an out of memory error: aoqi@0: // - if there is a preallocated error with backtrace available then return it wth aoqi@0: // a filled in stack trace. aoqi@0: // - if there are no preallocated errors with backtrace available then return aoqi@0: // an error without backtrace. aoqi@0: int next; aoqi@0: if (_preallocated_out_of_memory_error_avail_count > 0) { aoqi@0: next = (int)Atomic::add(-1, &_preallocated_out_of_memory_error_avail_count); aoqi@0: assert(next < (int)PreallocatedOutOfMemoryErrorCount, "avail count is corrupt"); aoqi@0: } else { aoqi@0: next = -1; aoqi@0: } aoqi@0: if (next < 0) { aoqi@0: // all preallocated errors have been used. aoqi@0: // return default aoqi@0: return default_err; aoqi@0: } else { aoqi@0: // get the error object at the slot and set set it to NULL so that the aoqi@0: // array isn't keeping it alive anymore. aoqi@0: oop exc = preallocated_out_of_memory_errors()->obj_at(next); aoqi@0: assert(exc != NULL, "slot has been used already"); aoqi@0: preallocated_out_of_memory_errors()->obj_at_put(next, NULL); aoqi@0: aoqi@0: // use the message from the default error aoqi@0: oop msg = java_lang_Throwable::message(default_err); aoqi@0: assert(msg != NULL, "no message"); aoqi@0: java_lang_Throwable::set_message(exc, msg); aoqi@0: aoqi@0: // populate the stack trace and return it. aoqi@0: java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(exc); aoqi@0: return exc; aoqi@0: } aoqi@0: } aoqi@0: aoqi@0: intptr_t Universe::_non_oop_bits = 0; aoqi@0: aoqi@0: void* Universe::non_oop_word() { aoqi@0: // Neither the high bits nor the low bits of this value is allowed aoqi@0: // to look like (respectively) the high or low bits of a real oop. aoqi@0: // aoqi@0: // High and low are CPU-specific notions, but low always includes aoqi@0: // the low-order bit. Since oops are always aligned at least mod 4, aoqi@0: // setting the low-order bit will ensure that the low half of the aoqi@0: // word will never look like that of a real oop. aoqi@0: // aoqi@0: // Using the OS-supplied non-memory-address word (usually 0 or -1) aoqi@0: // will take care of the high bits, however many there are. aoqi@0: aoqi@0: if (_non_oop_bits == 0) { aoqi@0: _non_oop_bits = (intptr_t)os::non_memory_address_word() | 1; aoqi@0: } aoqi@0: aoqi@0: return (void*)_non_oop_bits; aoqi@0: } aoqi@0: aoqi@0: jint universe_init() { aoqi@0: assert(!Universe::_fully_initialized, "called after initialize_vtables"); aoqi@0: guarantee(1 << LogHeapWordSize == sizeof(HeapWord), aoqi@0: "LogHeapWordSize is incorrect."); aoqi@0: guarantee(sizeof(oop) >= sizeof(HeapWord), "HeapWord larger than oop?"); aoqi@0: guarantee(sizeof(oop) % sizeof(HeapWord) == 0, aoqi@0: "oop size is not not a multiple of HeapWord size"); aoqi@0: TraceTime timer("Genesis", TraceStartupTime); aoqi@0: JavaClasses::compute_hard_coded_offsets(); aoqi@0: aoqi@0: jint status = Universe::initialize_heap(); aoqi@0: if (status != JNI_OK) { aoqi@0: return status; aoqi@0: } aoqi@0: aoqi@0: Metaspace::global_initialize(); aoqi@0: aoqi@0: // Create memory for metadata. Must be after initializing heap for aoqi@0: // DumpSharedSpaces. aoqi@0: ClassLoaderData::init_null_class_loader_data(); aoqi@0: aoqi@0: // We have a heap so create the Method* caches before aoqi@0: // Metaspace::initialize_shared_spaces() tries to populate them. aoqi@0: Universe::_finalizer_register_cache = new LatestMethodCache(); aoqi@0: Universe::_loader_addClass_cache = new LatestMethodCache(); aoqi@0: Universe::_pd_implies_cache = new LatestMethodCache(); aoqi@0: aoqi@0: if (UseSharedSpaces) { aoqi@0: // Read the data structures supporting the shared spaces (shared aoqi@0: // system dictionary, symbol table, etc.). After that, access to aoqi@0: // the file (other than the mapped regions) is no longer needed, and aoqi@0: // the file is closed. Closing the file does not affect the aoqi@0: // currently mapped regions. aoqi@0: MetaspaceShared::initialize_shared_spaces(); aoqi@0: StringTable::create_table(); aoqi@0: } else { aoqi@0: SymbolTable::create_table(); aoqi@0: StringTable::create_table(); aoqi@0: ClassLoader::create_package_info_table(); iklam@7089: iklam@7089: if (DumpSharedSpaces) { iklam@7089: MetaspaceShared::prepare_for_dumping(); iklam@7089: } aoqi@0: } aoqi@0: aoqi@0: return JNI_OK; aoqi@0: } aoqi@0: aoqi@0: // Choose the heap base address and oop encoding mode aoqi@0: // when compressed oops are used: aoqi@0: // Unscaled - Use 32-bits oops without encoding when aoqi@0: // NarrowOopHeapBaseMin + heap_size < 4Gb aoqi@0: // ZeroBased - Use zero based compressed oops with encoding when aoqi@0: // NarrowOopHeapBaseMin + heap_size < 32Gb aoqi@0: // HeapBased - Use compressed oops with heap base + encoding. aoqi@0: aoqi@0: // 4Gb aoqi@0: static const uint64_t UnscaledOopHeapMax = (uint64_t(max_juint) + 1); aoqi@0: // 32Gb aoqi@0: // OopEncodingHeapMax == UnscaledOopHeapMax << LogMinObjAlignmentInBytes; aoqi@0: aoqi@0: char* Universe::preferred_heap_base(size_t heap_size, size_t alignment, NARROW_OOP_MODE mode) { aoqi@0: assert(is_size_aligned((size_t)OopEncodingHeapMax, alignment), "Must be"); aoqi@0: assert(is_size_aligned((size_t)UnscaledOopHeapMax, alignment), "Must be"); aoqi@0: assert(is_size_aligned(heap_size, alignment), "Must be"); aoqi@0: aoqi@0: uintx heap_base_min_address_aligned = align_size_up(HeapBaseMinAddress, alignment); aoqi@0: aoqi@0: size_t base = 0; aoqi@0: #ifdef _LP64 aoqi@0: if (UseCompressedOops) { aoqi@0: assert(mode == UnscaledNarrowOop || aoqi@0: mode == ZeroBasedNarrowOop || aoqi@0: mode == HeapBasedNarrowOop, "mode is invalid"); aoqi@0: const size_t total_size = heap_size + heap_base_min_address_aligned; aoqi@0: // Return specified base for the first request. aoqi@0: if (!FLAG_IS_DEFAULT(HeapBaseMinAddress) && (mode == UnscaledNarrowOop)) { aoqi@0: base = heap_base_min_address_aligned; aoqi@0: aoqi@0: // If the total size is small enough to allow UnscaledNarrowOop then aoqi@0: // just use UnscaledNarrowOop. aoqi@0: } else if ((total_size <= OopEncodingHeapMax) && (mode != HeapBasedNarrowOop)) { aoqi@0: if ((total_size <= UnscaledOopHeapMax) && (mode == UnscaledNarrowOop) && aoqi@0: (Universe::narrow_oop_shift() == 0)) { aoqi@0: // Use 32-bits oops without encoding and aoqi@0: // place heap's top on the 4Gb boundary aoqi@0: base = (UnscaledOopHeapMax - heap_size); aoqi@0: } else { aoqi@0: // Can't reserve with NarrowOopShift == 0 aoqi@0: Universe::set_narrow_oop_shift(LogMinObjAlignmentInBytes); aoqi@0: aoqi@0: if (mode == UnscaledNarrowOop || aoqi@0: mode == ZeroBasedNarrowOop && total_size <= UnscaledOopHeapMax) { aoqi@0: aoqi@0: // Use zero based compressed oops with encoding and aoqi@0: // place heap's top on the 32Gb boundary in case aoqi@0: // total_size > 4Gb or failed to reserve below 4Gb. aoqi@0: uint64_t heap_top = OopEncodingHeapMax; aoqi@0: aoqi@0: // For small heaps, save some space for compressed class pointer aoqi@0: // space so it can be decoded with no base. aoqi@0: if (UseCompressedClassPointers && !UseSharedSpaces && aoqi@0: OopEncodingHeapMax <= 32*G) { aoqi@0: aoqi@0: uint64_t class_space = align_size_up(CompressedClassSpaceSize, alignment); aoqi@0: assert(is_size_aligned((size_t)OopEncodingHeapMax-class_space, aoqi@0: alignment), "difference must be aligned too"); aoqi@0: uint64_t new_top = OopEncodingHeapMax-class_space; aoqi@0: aoqi@0: if (total_size <= new_top) { aoqi@0: heap_top = new_top; aoqi@0: } aoqi@0: } aoqi@0: aoqi@0: // Align base to the adjusted top of the heap aoqi@0: base = heap_top - heap_size; aoqi@0: } aoqi@0: } aoqi@0: } else { aoqi@0: // UnscaledNarrowOop encoding didn't work, and no base was found for ZeroBasedOops or aoqi@0: // HeapBasedNarrowOop encoding was requested. So, can't reserve below 32Gb. aoqi@0: Universe::set_narrow_oop_shift(LogMinObjAlignmentInBytes); aoqi@0: } aoqi@0: aoqi@0: // Set narrow_oop_base and narrow_oop_use_implicit_null_checks aoqi@0: // used in ReservedHeapSpace() constructors. aoqi@0: // The final values will be set in initialize_heap() below. aoqi@0: if ((base != 0) && ((base + heap_size) <= OopEncodingHeapMax)) { aoqi@0: // Use zero based compressed oops aoqi@0: Universe::set_narrow_oop_base(NULL); aoqi@0: // Don't need guard page for implicit checks in indexed aoqi@0: // addressing mode with zero based Compressed Oops. aoqi@0: Universe::set_narrow_oop_use_implicit_null_checks(true); aoqi@0: } else { aoqi@0: // Set to a non-NULL value so the ReservedSpace ctor computes aoqi@0: // the correct no-access prefix. aoqi@0: // The final value will be set in initialize_heap() below. aoqi@0: Universe::set_narrow_oop_base((address)UnscaledOopHeapMax); aoqi@0: #if defined(_WIN64) || defined(AIX) aoqi@0: if (UseLargePages) { aoqi@0: // Cannot allocate guard pages for implicit checks in indexed aoqi@0: // addressing mode when large pages are specified on windows. aoqi@0: Universe::set_narrow_oop_use_implicit_null_checks(false); aoqi@0: } aoqi@0: #endif // _WIN64 aoqi@0: } aoqi@0: } aoqi@0: #endif aoqi@0: aoqi@0: assert(is_ptr_aligned((char*)base, alignment), "Must be"); aoqi@0: return (char*)base; // also return NULL (don't care) for 32-bit VM aoqi@0: } aoqi@0: aoqi@0: jint Universe::initialize_heap() { aoqi@0: aoqi@0: if (UseParallelGC) { aoqi@0: #if INCLUDE_ALL_GCS aoqi@0: Universe::_collectedHeap = new ParallelScavengeHeap(); aoqi@0: #else // INCLUDE_ALL_GCS aoqi@0: fatal("UseParallelGC not supported in this VM."); aoqi@0: #endif // INCLUDE_ALL_GCS aoqi@0: aoqi@0: } else if (UseG1GC) { aoqi@0: #if INCLUDE_ALL_GCS jwilhelm@7369: G1CollectorPolicyExt* g1p = new G1CollectorPolicyExt(); aoqi@0: g1p->initialize_all(); aoqi@0: G1CollectedHeap* g1h = new G1CollectedHeap(g1p); aoqi@0: Universe::_collectedHeap = g1h; aoqi@0: #else // INCLUDE_ALL_GCS aoqi@0: fatal("UseG1GC not supported in java kernel vm."); aoqi@0: #endif // INCLUDE_ALL_GCS aoqi@0: aoqi@0: } else { aoqi@0: GenCollectorPolicy *gc_policy; aoqi@0: aoqi@0: if (UseSerialGC) { aoqi@0: gc_policy = new MarkSweepPolicy(); aoqi@0: } else if (UseConcMarkSweepGC) { aoqi@0: #if INCLUDE_ALL_GCS aoqi@0: if (UseAdaptiveSizePolicy) { aoqi@0: gc_policy = new ASConcurrentMarkSweepPolicy(); aoqi@0: } else { aoqi@0: gc_policy = new ConcurrentMarkSweepPolicy(); aoqi@0: } aoqi@0: #else // INCLUDE_ALL_GCS aoqi@0: fatal("UseConcMarkSweepGC not supported in this VM."); aoqi@0: #endif // INCLUDE_ALL_GCS aoqi@0: } else { // default old generation aoqi@0: gc_policy = new MarkSweepPolicy(); aoqi@0: } aoqi@0: gc_policy->initialize_all(); aoqi@0: aoqi@0: Universe::_collectedHeap = new GenCollectedHeap(gc_policy); aoqi@0: } aoqi@0: aoqi@0: ThreadLocalAllocBuffer::set_max_size(Universe::heap()->max_tlab_size()); aoqi@0: aoqi@0: jint status = Universe::heap()->initialize(); aoqi@0: if (status != JNI_OK) { aoqi@0: return status; aoqi@0: } aoqi@0: aoqi@0: #ifdef _LP64 aoqi@0: if (UseCompressedOops) { aoqi@0: // Subtract a page because something can get allocated at heap base. aoqi@0: // This also makes implicit null checking work, because the aoqi@0: // memory+1 page below heap_base needs to cause a signal. aoqi@0: // See needs_explicit_null_check. aoqi@0: // Only set the heap base for compressed oops because it indicates aoqi@0: // compressed oops for pstack code. aoqi@0: bool verbose = PrintCompressedOopsMode || (PrintMiscellaneous && Verbose); aoqi@0: if (verbose) { aoqi@0: tty->cr(); aoqi@0: tty->print("heap address: " PTR_FORMAT ", size: " SIZE_FORMAT " MB", aoqi@0: Universe::heap()->base(), Universe::heap()->reserved_region().byte_size()/M); aoqi@0: } aoqi@0: if (((uint64_t)Universe::heap()->reserved_region().end() > OopEncodingHeapMax)) { aoqi@0: // Can't reserve heap below 32Gb. aoqi@0: // keep the Universe::narrow_oop_base() set in Universe::reserve_heap() aoqi@0: Universe::set_narrow_oop_shift(LogMinObjAlignmentInBytes); aoqi@0: #ifdef AIX aoqi@0: // There is no protected page before the heap. This assures all oops aoqi@0: // are decoded so that NULL is preserved, so this page will not be accessed. aoqi@0: Universe::set_narrow_oop_use_implicit_null_checks(false); aoqi@0: #endif aoqi@0: if (verbose) { aoqi@0: tty->print(", %s: "PTR_FORMAT, aoqi@0: narrow_oop_mode_to_string(HeapBasedNarrowOop), aoqi@0: Universe::narrow_oop_base()); aoqi@0: } aoqi@0: } else { aoqi@0: Universe::set_narrow_oop_base(0); aoqi@0: if (verbose) { aoqi@0: tty->print(", %s", narrow_oop_mode_to_string(ZeroBasedNarrowOop)); aoqi@0: } aoqi@0: #ifdef _WIN64 aoqi@0: if (!Universe::narrow_oop_use_implicit_null_checks()) { aoqi@0: // Don't need guard page for implicit checks in indexed addressing aoqi@0: // mode with zero based Compressed Oops. aoqi@0: Universe::set_narrow_oop_use_implicit_null_checks(true); aoqi@0: } aoqi@0: #endif // _WIN64 aoqi@0: if((uint64_t)Universe::heap()->reserved_region().end() > UnscaledOopHeapMax) { aoqi@0: // Can't reserve heap below 4Gb. aoqi@0: Universe::set_narrow_oop_shift(LogMinObjAlignmentInBytes); aoqi@0: } else { aoqi@0: Universe::set_narrow_oop_shift(0); aoqi@0: if (verbose) { aoqi@0: tty->print(", %s", narrow_oop_mode_to_string(UnscaledNarrowOop)); aoqi@0: } aoqi@0: } aoqi@0: } aoqi@0: aoqi@0: if (verbose) { aoqi@0: tty->cr(); aoqi@0: tty->cr(); aoqi@0: } aoqi@0: Universe::set_narrow_ptrs_base(Universe::narrow_oop_base()); aoqi@0: } aoqi@0: // Universe::narrow_oop_base() is one page below the heap. aoqi@0: assert((intptr_t)Universe::narrow_oop_base() <= (intptr_t)(Universe::heap()->base() - aoqi@0: os::vm_page_size()) || aoqi@0: Universe::narrow_oop_base() == NULL, "invalid value"); aoqi@0: assert(Universe::narrow_oop_shift() == LogMinObjAlignmentInBytes || aoqi@0: Universe::narrow_oop_shift() == 0, "invalid value"); aoqi@0: #endif aoqi@0: aoqi@0: // We will never reach the CATCH below since Exceptions::_throw will cause aoqi@0: // the VM to exit if an exception is thrown during initialization aoqi@0: aoqi@0: if (UseTLAB) { aoqi@0: assert(Universe::heap()->supports_tlab_allocation(), aoqi@0: "Should support thread-local allocation buffers"); aoqi@0: ThreadLocalAllocBuffer::startup_initialization(); aoqi@0: } aoqi@0: return JNI_OK; aoqi@0: } aoqi@0: aoqi@0: aoqi@0: // Reserve the Java heap, which is now the same for all GCs. aoqi@0: ReservedSpace Universe::reserve_heap(size_t heap_size, size_t alignment) { aoqi@0: assert(alignment <= Arguments::conservative_max_heap_alignment(), aoqi@0: err_msg("actual alignment "SIZE_FORMAT" must be within maximum heap alignment "SIZE_FORMAT, aoqi@0: alignment, Arguments::conservative_max_heap_alignment())); aoqi@0: size_t total_reserved = align_size_up(heap_size, alignment); aoqi@0: assert(!UseCompressedOops || (total_reserved <= (OopEncodingHeapMax - os::vm_page_size())), aoqi@0: "heap size is too big for compressed oops"); aoqi@0: aoqi@0: bool use_large_pages = UseLargePages && is_size_aligned(alignment, os::large_page_size()); aoqi@0: assert(!UseLargePages aoqi@0: || UseParallelGC aoqi@0: || use_large_pages, "Wrong alignment to use large pages"); aoqi@0: aoqi@0: char* addr = Universe::preferred_heap_base(total_reserved, alignment, Universe::UnscaledNarrowOop); aoqi@0: aoqi@0: ReservedHeapSpace total_rs(total_reserved, alignment, use_large_pages, addr); aoqi@0: aoqi@0: if (UseCompressedOops) { aoqi@0: if (addr != NULL && !total_rs.is_reserved()) { aoqi@0: // Failed to reserve at specified address - the requested memory aoqi@0: // region is taken already, for example, by 'java' launcher. aoqi@0: // Try again to reserver heap higher. aoqi@0: addr = Universe::preferred_heap_base(total_reserved, alignment, Universe::ZeroBasedNarrowOop); aoqi@0: aoqi@0: ReservedHeapSpace total_rs0(total_reserved, alignment, aoqi@0: use_large_pages, addr); aoqi@0: aoqi@0: if (addr != NULL && !total_rs0.is_reserved()) { aoqi@0: // Failed to reserve at specified address again - give up. aoqi@0: addr = Universe::preferred_heap_base(total_reserved, alignment, Universe::HeapBasedNarrowOop); aoqi@0: assert(addr == NULL, ""); aoqi@0: aoqi@0: ReservedHeapSpace total_rs1(total_reserved, alignment, aoqi@0: use_large_pages, addr); aoqi@0: total_rs = total_rs1; aoqi@0: } else { aoqi@0: total_rs = total_rs0; aoqi@0: } aoqi@0: } aoqi@0: } aoqi@0: aoqi@0: if (!total_rs.is_reserved()) { aoqi@0: vm_exit_during_initialization(err_msg("Could not reserve enough space for " SIZE_FORMAT "KB object heap", total_reserved/K)); aoqi@0: return total_rs; aoqi@0: } aoqi@0: aoqi@0: if (UseCompressedOops) { aoqi@0: // Universe::initialize_heap() will reset this to NULL if unscaled aoqi@0: // or zero-based narrow oops are actually used. aoqi@0: address base = (address)(total_rs.base() - os::vm_page_size()); aoqi@0: Universe::set_narrow_oop_base(base); aoqi@0: } aoqi@0: return total_rs; aoqi@0: } aoqi@0: aoqi@0: aoqi@0: // It's the caller's responsibility to ensure glitch-freedom aoqi@0: // (if required). aoqi@0: void Universe::update_heap_info_at_gc() { aoqi@0: _heap_capacity_at_last_gc = heap()->capacity(); aoqi@0: _heap_used_at_last_gc = heap()->used(); aoqi@0: } aoqi@0: aoqi@0: aoqi@0: const char* Universe::narrow_oop_mode_to_string(Universe::NARROW_OOP_MODE mode) { aoqi@0: switch (mode) { aoqi@0: case UnscaledNarrowOop: aoqi@0: return "32-bits Oops"; aoqi@0: case ZeroBasedNarrowOop: aoqi@0: return "zero based Compressed Oops"; aoqi@0: case HeapBasedNarrowOop: aoqi@0: return "Compressed Oops with base"; aoqi@0: } aoqi@0: aoqi@0: ShouldNotReachHere(); aoqi@0: return ""; aoqi@0: } aoqi@0: aoqi@0: aoqi@0: Universe::NARROW_OOP_MODE Universe::narrow_oop_mode() { aoqi@0: if (narrow_oop_base() != 0) { aoqi@0: return HeapBasedNarrowOop; aoqi@0: } aoqi@0: aoqi@0: if (narrow_oop_shift() != 0) { aoqi@0: return ZeroBasedNarrowOop; aoqi@0: } aoqi@0: aoqi@0: return UnscaledNarrowOop; aoqi@0: } aoqi@0: aoqi@0: aoqi@0: void universe2_init() { aoqi@0: EXCEPTION_MARK; aoqi@0: Universe::genesis(CATCH); aoqi@0: } aoqi@0: aoqi@0: aoqi@0: // This function is defined in JVM.cpp aoqi@0: extern void initialize_converter_functions(); aoqi@0: aoqi@0: bool universe_post_init() { aoqi@0: assert(!is_init_completed(), "Error: initialization not yet completed!"); aoqi@0: Universe::_fully_initialized = true; aoqi@0: EXCEPTION_MARK; aoqi@0: { ResourceMark rm; aoqi@0: Interpreter::initialize(); // needed for interpreter entry points aoqi@0: if (!UseSharedSpaces) { aoqi@0: HandleMark hm(THREAD); aoqi@0: KlassHandle ok_h(THREAD, SystemDictionary::Object_klass()); aoqi@0: Universe::reinitialize_vtable_of(ok_h, CHECK_false); aoqi@0: Universe::reinitialize_itables(CHECK_false); aoqi@0: } aoqi@0: } aoqi@0: aoqi@0: HandleMark hm(THREAD); aoqi@0: Klass* k; aoqi@0: instanceKlassHandle k_h; aoqi@0: // Setup preallocated empty java.lang.Class array aoqi@0: Universe::_the_empty_class_klass_array = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_false); aoqi@0: aoqi@0: // Setup preallocated OutOfMemoryError errors aoqi@0: k = SystemDictionary::resolve_or_fail(vmSymbols::java_lang_OutOfMemoryError(), true, CHECK_false); aoqi@0: k_h = instanceKlassHandle(THREAD, k); aoqi@0: Universe::_out_of_memory_error_java_heap = k_h->allocate_instance(CHECK_false); aoqi@0: Universe::_out_of_memory_error_metaspace = k_h->allocate_instance(CHECK_false); aoqi@0: Universe::_out_of_memory_error_class_metaspace = k_h->allocate_instance(CHECK_false); aoqi@0: Universe::_out_of_memory_error_array_size = k_h->allocate_instance(CHECK_false); aoqi@0: Universe::_out_of_memory_error_gc_overhead_limit = aoqi@0: k_h->allocate_instance(CHECK_false); roland@7419: Universe::_out_of_memory_error_realloc_objects = k_h->allocate_instance(CHECK_false); aoqi@0: aoqi@0: // Setup preallocated NullPointerException aoqi@0: // (this is currently used for a cheap & dirty solution in compiler exception handling) aoqi@0: k = SystemDictionary::resolve_or_fail(vmSymbols::java_lang_NullPointerException(), true, CHECK_false); aoqi@0: Universe::_null_ptr_exception_instance = InstanceKlass::cast(k)->allocate_instance(CHECK_false); aoqi@0: // Setup preallocated ArithmeticException aoqi@0: // (this is currently used for a cheap & dirty solution in compiler exception handling) aoqi@0: k = SystemDictionary::resolve_or_fail(vmSymbols::java_lang_ArithmeticException(), true, CHECK_false); aoqi@0: Universe::_arithmetic_exception_instance = InstanceKlass::cast(k)->allocate_instance(CHECK_false); aoqi@0: // Virtual Machine Error for when we get into a situation we can't resolve aoqi@0: k = SystemDictionary::resolve_or_fail( aoqi@0: vmSymbols::java_lang_VirtualMachineError(), true, CHECK_false); aoqi@0: bool linked = InstanceKlass::cast(k)->link_class_or_fail(CHECK_false); aoqi@0: if (!linked) { aoqi@0: tty->print_cr("Unable to link/verify VirtualMachineError class"); aoqi@0: return false; // initialization failed aoqi@0: } aoqi@0: Universe::_virtual_machine_error_instance = aoqi@0: InstanceKlass::cast(k)->allocate_instance(CHECK_false); aoqi@0: aoqi@0: Universe::_vm_exception = InstanceKlass::cast(k)->allocate_instance(CHECK_false); aoqi@0: aoqi@0: if (!DumpSharedSpaces) { aoqi@0: // These are the only Java fields that are currently set during shared space dumping. aoqi@0: // We prefer to not handle this generally, so we always reinitialize these detail messages. aoqi@0: Handle msg = java_lang_String::create_from_str("Java heap space", CHECK_false); aoqi@0: java_lang_Throwable::set_message(Universe::_out_of_memory_error_java_heap, msg()); aoqi@0: aoqi@0: msg = java_lang_String::create_from_str("Metaspace", CHECK_false); aoqi@0: java_lang_Throwable::set_message(Universe::_out_of_memory_error_metaspace, msg()); aoqi@0: msg = java_lang_String::create_from_str("Compressed class space", CHECK_false); aoqi@0: java_lang_Throwable::set_message(Universe::_out_of_memory_error_class_metaspace, msg()); aoqi@0: aoqi@0: msg = java_lang_String::create_from_str("Requested array size exceeds VM limit", CHECK_false); aoqi@0: java_lang_Throwable::set_message(Universe::_out_of_memory_error_array_size, msg()); aoqi@0: aoqi@0: msg = java_lang_String::create_from_str("GC overhead limit exceeded", CHECK_false); aoqi@0: java_lang_Throwable::set_message(Universe::_out_of_memory_error_gc_overhead_limit, msg()); aoqi@0: roland@7419: msg = java_lang_String::create_from_str("Java heap space: failed reallocation of scalar replaced objects", CHECK_false); roland@7419: java_lang_Throwable::set_message(Universe::_out_of_memory_error_realloc_objects, msg()); roland@7419: aoqi@0: msg = java_lang_String::create_from_str("/ by zero", CHECK_false); aoqi@0: java_lang_Throwable::set_message(Universe::_arithmetic_exception_instance, msg()); aoqi@0: aoqi@0: // Setup the array of errors that have preallocated backtrace aoqi@0: k = Universe::_out_of_memory_error_java_heap->klass(); aoqi@0: assert(k->name() == vmSymbols::java_lang_OutOfMemoryError(), "should be out of memory error"); aoqi@0: k_h = instanceKlassHandle(THREAD, k); aoqi@0: aoqi@0: int len = (StackTraceInThrowable) ? (int)PreallocatedOutOfMemoryErrorCount : 0; aoqi@0: Universe::_preallocated_out_of_memory_error_array = oopFactory::new_objArray(k_h(), len, CHECK_false); aoqi@0: for (int i=0; iallocate_instance(CHECK_false); aoqi@0: Handle err_h = Handle(THREAD, err); aoqi@0: java_lang_Throwable::allocate_backtrace(err_h, CHECK_false); aoqi@0: Universe::preallocated_out_of_memory_errors()->obj_at_put(i, err_h()); aoqi@0: } aoqi@0: Universe::_preallocated_out_of_memory_error_avail_count = (jint)len; aoqi@0: } aoqi@0: aoqi@0: aoqi@0: // Setup static method for registering finalizers aoqi@0: // The finalizer klass must be linked before looking up the method, in aoqi@0: // case it needs to get rewritten. aoqi@0: InstanceKlass::cast(SystemDictionary::Finalizer_klass())->link_class(CHECK_false); aoqi@0: Method* m = InstanceKlass::cast(SystemDictionary::Finalizer_klass())->find_method( aoqi@0: vmSymbols::register_method_name(), aoqi@0: vmSymbols::register_method_signature()); aoqi@0: if (m == NULL || !m->is_static()) { aoqi@0: tty->print_cr("Unable to link/verify Finalizer.register method"); aoqi@0: return false; // initialization failed (cannot throw exception yet) aoqi@0: } aoqi@0: Universe::_finalizer_register_cache->init( aoqi@0: SystemDictionary::Finalizer_klass(), m); aoqi@0: aoqi@0: InstanceKlass::cast(SystemDictionary::misc_Unsafe_klass())->link_class(CHECK_false); aoqi@0: m = InstanceKlass::cast(SystemDictionary::misc_Unsafe_klass())->find_method( aoqi@0: vmSymbols::throwIllegalAccessError_name(), aoqi@0: vmSymbols::void_method_signature()); aoqi@0: if (m != NULL && !m->is_static()) { aoqi@0: // Note null is okay; this method is used in itables, and if it is null, aoqi@0: // then AbstractMethodError is thrown instead. aoqi@0: tty->print_cr("Unable to link/verify Unsafe.throwIllegalAccessError method"); aoqi@0: return false; // initialization failed (cannot throw exception yet) aoqi@0: } aoqi@0: Universe::_throw_illegal_access_error = m; aoqi@0: aoqi@0: // Setup method for registering loaded classes in class loader vector aoqi@0: InstanceKlass::cast(SystemDictionary::ClassLoader_klass())->link_class(CHECK_false); aoqi@0: m = InstanceKlass::cast(SystemDictionary::ClassLoader_klass())->find_method(vmSymbols::addClass_name(), vmSymbols::class_void_signature()); aoqi@0: if (m == NULL || m->is_static()) { aoqi@0: tty->print_cr("Unable to link/verify ClassLoader.addClass method"); aoqi@0: return false; // initialization failed (cannot throw exception yet) aoqi@0: } aoqi@0: Universe::_loader_addClass_cache->init( aoqi@0: SystemDictionary::ClassLoader_klass(), m); aoqi@0: aoqi@0: // Setup method for checking protection domain aoqi@0: InstanceKlass::cast(SystemDictionary::ProtectionDomain_klass())->link_class(CHECK_false); aoqi@0: m = InstanceKlass::cast(SystemDictionary::ProtectionDomain_klass())-> aoqi@0: find_method(vmSymbols::impliesCreateAccessControlContext_name(), aoqi@0: vmSymbols::void_boolean_signature()); aoqi@0: // Allow NULL which should only happen with bootstrapping. aoqi@0: if (m != NULL) { aoqi@0: if (m->is_static()) { aoqi@0: // NoSuchMethodException doesn't actually work because it tries to run the aoqi@0: // function before java_lang_Class is linked. Print error and exit. aoqi@0: tty->print_cr("ProtectionDomain.impliesCreateAccessControlContext() has the wrong linkage"); aoqi@0: return false; // initialization failed aoqi@0: } aoqi@0: Universe::_pd_implies_cache->init( aoqi@0: SystemDictionary::ProtectionDomain_klass(), m);; aoqi@0: } aoqi@0: aoqi@0: // The folowing is initializing converter functions for serialization in aoqi@0: // JVM.cpp. If we clean up the StrictMath code above we may want to find aoqi@0: // a better solution for this as well. aoqi@0: initialize_converter_functions(); aoqi@0: aoqi@0: // This needs to be done before the first scavenge/gc, since aoqi@0: // it's an input to soft ref clearing policy. aoqi@0: { aoqi@0: MutexLocker x(Heap_lock); aoqi@0: Universe::update_heap_info_at_gc(); aoqi@0: } aoqi@0: aoqi@0: // ("weak") refs processing infrastructure initialization aoqi@0: Universe::heap()->post_initialize(); aoqi@0: aoqi@0: // Initialize performance counters for metaspaces aoqi@0: MetaspaceCounters::initialize_performance_counters(); aoqi@0: CompressedClassSpaceCounters::initialize_performance_counters(); aoqi@0: aoqi@0: MemoryService::add_metaspace_memory_pools(); aoqi@0: aoqi@0: MemoryService::set_universe_heap(Universe::_collectedHeap); iklam@7089: #if INCLUDE_CDS iklam@7089: if (UseSharedSpaces) { iklam@7089: SharedClassUtil::initialize(CHECK_false); iklam@7089: } iklam@7089: #endif aoqi@0: return true; aoqi@0: } aoqi@0: aoqi@0: aoqi@0: void Universe::compute_base_vtable_size() { aoqi@0: _base_vtable_size = ClassLoader::compute_Object_vtable(); aoqi@0: } aoqi@0: aoqi@0: aoqi@0: // %%% The Universe::flush_foo methods belong in CodeCache. aoqi@0: aoqi@0: // Flushes compiled methods dependent on dependee. aoqi@0: void Universe::flush_dependents_on(instanceKlassHandle dependee) { aoqi@0: assert_lock_strong(Compile_lock); aoqi@0: aoqi@0: if (CodeCache::number_of_nmethods_with_dependencies() == 0) return; aoqi@0: aoqi@0: // CodeCache can only be updated by a thread_in_VM and they will all be aoqi@0: // stopped dring the safepoint so CodeCache will be safe to update without aoqi@0: // holding the CodeCache_lock. aoqi@0: aoqi@0: KlassDepChange changes(dependee); aoqi@0: aoqi@0: // Compute the dependent nmethods aoqi@0: if (CodeCache::mark_for_deoptimization(changes) > 0) { aoqi@0: // At least one nmethod has been marked for deoptimization aoqi@0: VM_Deoptimize op; aoqi@0: VMThread::execute(&op); aoqi@0: } aoqi@0: } aoqi@0: aoqi@0: // Flushes compiled methods dependent on a particular CallSite aoqi@0: // instance when its target is different than the given MethodHandle. aoqi@0: void Universe::flush_dependents_on(Handle call_site, Handle method_handle) { aoqi@0: assert_lock_strong(Compile_lock); aoqi@0: aoqi@0: if (CodeCache::number_of_nmethods_with_dependencies() == 0) return; aoqi@0: aoqi@0: // CodeCache can only be updated by a thread_in_VM and they will all be aoqi@0: // stopped dring the safepoint so CodeCache will be safe to update without aoqi@0: // holding the CodeCache_lock. aoqi@0: aoqi@0: CallSiteDepChange changes(call_site(), method_handle()); aoqi@0: aoqi@0: // Compute the dependent nmethods that have a reference to a aoqi@0: // CallSite object. We use InstanceKlass::mark_dependent_nmethod aoqi@0: // directly instead of CodeCache::mark_for_deoptimization because we aoqi@0: // want dependents on the call site class only not all classes in aoqi@0: // the ContextStream. aoqi@0: int marked = 0; aoqi@0: { aoqi@0: MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); aoqi@0: InstanceKlass* call_site_klass = InstanceKlass::cast(call_site->klass()); aoqi@0: marked = call_site_klass->mark_dependent_nmethods(changes); aoqi@0: } aoqi@0: if (marked > 0) { aoqi@0: // At least one nmethod has been marked for deoptimization aoqi@0: VM_Deoptimize op; aoqi@0: VMThread::execute(&op); aoqi@0: } aoqi@0: } aoqi@0: aoqi@0: #ifdef HOTSWAP aoqi@0: // Flushes compiled methods dependent on dependee in the evolutionary sense aoqi@0: void Universe::flush_evol_dependents_on(instanceKlassHandle ev_k_h) { aoqi@0: // --- Compile_lock is not held. However we are at a safepoint. aoqi@0: assert_locked_or_safepoint(Compile_lock); aoqi@0: if (CodeCache::number_of_nmethods_with_dependencies() == 0) return; aoqi@0: aoqi@0: // CodeCache can only be updated by a thread_in_VM and they will all be aoqi@0: // stopped dring the safepoint so CodeCache will be safe to update without aoqi@0: // holding the CodeCache_lock. aoqi@0: aoqi@0: // Compute the dependent nmethods aoqi@0: if (CodeCache::mark_for_evol_deoptimization(ev_k_h) > 0) { aoqi@0: // At least one nmethod has been marked for deoptimization aoqi@0: aoqi@0: // All this already happens inside a VM_Operation, so we'll do all the work here. aoqi@0: // Stuff copied from VM_Deoptimize and modified slightly. aoqi@0: aoqi@0: // We do not want any GCs to happen while we are in the middle of this VM operation aoqi@0: ResourceMark rm; aoqi@0: DeoptimizationMarker dm; aoqi@0: aoqi@0: // Deoptimize all activations depending on marked nmethods aoqi@0: Deoptimization::deoptimize_dependents(); aoqi@0: aoqi@0: // Make the dependent methods not entrant (in VM_Deoptimize they are made zombies) aoqi@0: CodeCache::make_marked_nmethods_not_entrant(); aoqi@0: } aoqi@0: } aoqi@0: #endif // HOTSWAP aoqi@0: aoqi@0: aoqi@0: // Flushes compiled methods dependent on dependee aoqi@0: void Universe::flush_dependents_on_method(methodHandle m_h) { aoqi@0: // --- Compile_lock is not held. However we are at a safepoint. aoqi@0: assert_locked_or_safepoint(Compile_lock); aoqi@0: aoqi@0: // CodeCache can only be updated by a thread_in_VM and they will all be aoqi@0: // stopped dring the safepoint so CodeCache will be safe to update without aoqi@0: // holding the CodeCache_lock. aoqi@0: aoqi@0: // Compute the dependent nmethods aoqi@0: if (CodeCache::mark_for_deoptimization(m_h()) > 0) { aoqi@0: // At least one nmethod has been marked for deoptimization aoqi@0: aoqi@0: // All this already happens inside a VM_Operation, so we'll do all the work here. aoqi@0: // Stuff copied from VM_Deoptimize and modified slightly. aoqi@0: aoqi@0: // We do not want any GCs to happen while we are in the middle of this VM operation aoqi@0: ResourceMark rm; aoqi@0: DeoptimizationMarker dm; aoqi@0: aoqi@0: // Deoptimize all activations depending on marked nmethods aoqi@0: Deoptimization::deoptimize_dependents(); aoqi@0: aoqi@0: // Make the dependent methods not entrant (in VM_Deoptimize they are made zombies) aoqi@0: CodeCache::make_marked_nmethods_not_entrant(); aoqi@0: } aoqi@0: } aoqi@0: aoqi@0: void Universe::print() { aoqi@0: print_on(gclog_or_tty); aoqi@0: } aoqi@0: aoqi@0: void Universe::print_on(outputStream* st, bool extended) { aoqi@0: st->print_cr("Heap"); aoqi@0: if (!extended) { aoqi@0: heap()->print_on(st); aoqi@0: } else { aoqi@0: heap()->print_extended_on(st); aoqi@0: } aoqi@0: } aoqi@0: aoqi@0: void Universe::print_heap_at_SIGBREAK() { aoqi@0: if (PrintHeapAtSIGBREAK) { aoqi@0: MutexLocker hl(Heap_lock); aoqi@0: print_on(tty); aoqi@0: tty->cr(); aoqi@0: tty->flush(); aoqi@0: } aoqi@0: } aoqi@0: aoqi@0: void Universe::print_heap_before_gc(outputStream* st, bool ignore_extended) { aoqi@0: st->print_cr("{Heap before GC invocations=%u (full %u):", aoqi@0: heap()->total_collections(), aoqi@0: heap()->total_full_collections()); aoqi@0: if (!PrintHeapAtGCExtended || ignore_extended) { aoqi@0: heap()->print_on(st); aoqi@0: } else { aoqi@0: heap()->print_extended_on(st); aoqi@0: } aoqi@0: } aoqi@0: aoqi@0: void Universe::print_heap_after_gc(outputStream* st, bool ignore_extended) { aoqi@0: st->print_cr("Heap after GC invocations=%u (full %u):", aoqi@0: heap()->total_collections(), aoqi@0: heap()->total_full_collections()); aoqi@0: if (!PrintHeapAtGCExtended || ignore_extended) { aoqi@0: heap()->print_on(st); aoqi@0: } else { aoqi@0: heap()->print_extended_on(st); aoqi@0: } aoqi@0: st->print_cr("}"); aoqi@0: } aoqi@0: aoqi@0: void Universe::verify(VerifyOption option, const char* prefix, bool silent) { aoqi@0: // The use of _verify_in_progress is a temporary work around for aoqi@0: // 6320749. Don't bother with a creating a class to set and clear aoqi@0: // it since it is only used in this method and the control flow is aoqi@0: // straight forward. aoqi@0: _verify_in_progress = true; aoqi@0: aoqi@0: COMPILER2_PRESENT( aoqi@0: assert(!DerivedPointerTable::is_active(), aoqi@0: "DPT should not be active during verification " aoqi@0: "(of thread stacks below)"); aoqi@0: ) aoqi@0: aoqi@0: ResourceMark rm; aoqi@0: HandleMark hm; // Handles created during verification can be zapped aoqi@0: _verify_count++; aoqi@0: aoqi@0: if (!silent) gclog_or_tty->print("%s", prefix); aoqi@0: if (!silent) gclog_or_tty->print("[Verifying "); aoqi@0: if (!silent) gclog_or_tty->print("threads "); aoqi@0: Threads::verify(); aoqi@0: if (!silent) gclog_or_tty->print("heap "); aoqi@0: heap()->verify(silent, option); aoqi@0: if (!silent) gclog_or_tty->print("syms "); aoqi@0: SymbolTable::verify(); aoqi@0: if (!silent) gclog_or_tty->print("strs "); aoqi@0: StringTable::verify(); aoqi@0: { aoqi@0: MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); aoqi@0: if (!silent) gclog_or_tty->print("zone "); aoqi@0: CodeCache::verify(); aoqi@0: } aoqi@0: if (!silent) gclog_or_tty->print("dict "); aoqi@0: SystemDictionary::verify(); aoqi@0: #ifndef PRODUCT aoqi@0: if (!silent) gclog_or_tty->print("cldg "); aoqi@0: ClassLoaderDataGraph::verify(); aoqi@0: #endif aoqi@0: if (!silent) gclog_or_tty->print("metaspace chunks "); aoqi@0: MetaspaceAux::verify_free_chunks(); aoqi@0: if (!silent) gclog_or_tty->print("hand "); aoqi@0: JNIHandles::verify(); aoqi@0: if (!silent) gclog_or_tty->print("C-heap "); aoqi@0: os::check_heap(); aoqi@0: if (!silent) gclog_or_tty->print("code cache "); aoqi@0: CodeCache::verify_oops(); aoqi@0: if (!silent) gclog_or_tty->print_cr("]"); aoqi@0: aoqi@0: _verify_in_progress = false; aoqi@0: } aoqi@0: aoqi@0: // Oop verification (see MacroAssembler::verify_oop) aoqi@0: aoqi@0: static uintptr_t _verify_oop_data[2] = {0, (uintptr_t)-1}; aoqi@0: static uintptr_t _verify_klass_data[2] = {0, (uintptr_t)-1}; aoqi@0: aoqi@0: aoqi@0: #ifndef PRODUCT aoqi@0: aoqi@0: static void calculate_verify_data(uintptr_t verify_data[2], aoqi@0: HeapWord* low_boundary, aoqi@0: HeapWord* high_boundary) { aoqi@0: assert(low_boundary < high_boundary, "bad interval"); aoqi@0: aoqi@0: // decide which low-order bits we require to be clear: aoqi@0: size_t alignSize = MinObjAlignmentInBytes; aoqi@0: size_t min_object_size = CollectedHeap::min_fill_size(); aoqi@0: aoqi@0: // make an inclusive limit: aoqi@0: uintptr_t max = (uintptr_t)high_boundary - min_object_size*wordSize; aoqi@0: uintptr_t min = (uintptr_t)low_boundary; aoqi@0: assert(min < max, "bad interval"); aoqi@0: uintptr_t diff = max ^ min; aoqi@0: aoqi@0: // throw away enough low-order bits to make the diff vanish aoqi@0: uintptr_t mask = (uintptr_t)(-1); aoqi@0: while ((mask & diff) != 0) aoqi@0: mask <<= 1; aoqi@0: uintptr_t bits = (min & mask); aoqi@0: assert(bits == (max & mask), "correct mask"); aoqi@0: // check an intermediate value between min and max, just to make sure: aoqi@0: assert(bits == ((min + (max-min)/2) & mask), "correct mask"); aoqi@0: aoqi@0: // require address alignment, too: aoqi@0: mask |= (alignSize - 1); aoqi@0: aoqi@0: if (!(verify_data[0] == 0 && verify_data[1] == (uintptr_t)-1)) { aoqi@0: assert(verify_data[0] == mask && verify_data[1] == bits, "mask stability"); aoqi@0: } aoqi@0: verify_data[0] = mask; aoqi@0: verify_data[1] = bits; aoqi@0: } aoqi@0: aoqi@0: // Oop verification (see MacroAssembler::verify_oop) aoqi@0: aoqi@0: uintptr_t Universe::verify_oop_mask() { aoqi@0: MemRegion m = heap()->reserved_region(); aoqi@0: calculate_verify_data(_verify_oop_data, aoqi@0: m.start(), aoqi@0: m.end()); aoqi@0: return _verify_oop_data[0]; aoqi@0: } aoqi@0: aoqi@0: aoqi@0: aoqi@0: uintptr_t Universe::verify_oop_bits() { aoqi@0: verify_oop_mask(); aoqi@0: return _verify_oop_data[1]; aoqi@0: } aoqi@0: aoqi@0: uintptr_t Universe::verify_mark_mask() { aoqi@0: return markOopDesc::lock_mask_in_place; aoqi@0: } aoqi@0: aoqi@0: uintptr_t Universe::verify_mark_bits() { aoqi@0: intptr_t mask = verify_mark_mask(); aoqi@0: intptr_t bits = (intptr_t)markOopDesc::prototype(); aoqi@0: assert((bits & ~mask) == 0, "no stray header bits"); aoqi@0: return bits; aoqi@0: } aoqi@0: #endif // PRODUCT aoqi@0: aoqi@0: aoqi@0: void Universe::compute_verify_oop_data() { aoqi@0: verify_oop_mask(); aoqi@0: verify_oop_bits(); aoqi@0: verify_mark_mask(); aoqi@0: verify_mark_bits(); aoqi@0: } aoqi@0: aoqi@0: aoqi@0: void LatestMethodCache::init(Klass* k, Method* m) { aoqi@0: if (!UseSharedSpaces) { aoqi@0: _klass = k; aoqi@0: } aoqi@0: #ifndef PRODUCT aoqi@0: else { aoqi@0: // sharing initilization should have already set up _klass aoqi@0: assert(_klass != NULL, "just checking"); aoqi@0: } aoqi@0: #endif aoqi@0: aoqi@0: _method_idnum = m->method_idnum(); aoqi@0: assert(_method_idnum >= 0, "sanity check"); aoqi@0: } aoqi@0: aoqi@0: aoqi@0: Method* LatestMethodCache::get_method() { aoqi@0: if (klass() == NULL) return NULL; aoqi@0: InstanceKlass* ik = InstanceKlass::cast(klass()); aoqi@0: Method* m = ik->method_with_idnum(method_idnum()); aoqi@0: assert(m != NULL, "sanity check"); aoqi@0: return m; aoqi@0: } aoqi@0: aoqi@0: aoqi@0: #ifdef ASSERT aoqi@0: // Release dummy object(s) at bottom of heap aoqi@0: bool Universe::release_fullgc_alot_dummy() { aoqi@0: MutexLocker ml(FullGCALot_lock); aoqi@0: if (_fullgc_alot_dummy_array != NULL) { aoqi@0: if (_fullgc_alot_dummy_next >= _fullgc_alot_dummy_array->length()) { aoqi@0: // No more dummies to release, release entire array instead aoqi@0: _fullgc_alot_dummy_array = NULL; aoqi@0: return false; aoqi@0: } aoqi@0: if (!UseConcMarkSweepGC) { aoqi@0: // Release dummy at bottom of old generation aoqi@0: _fullgc_alot_dummy_array->obj_at_put(_fullgc_alot_dummy_next++, NULL); aoqi@0: } aoqi@0: // Release dummy at bottom of permanent generation aoqi@0: _fullgc_alot_dummy_array->obj_at_put(_fullgc_alot_dummy_next++, NULL); aoqi@0: } aoqi@0: return true; aoqi@0: } aoqi@0: aoqi@0: #endif // ASSERT