| /* |
| * Copyright (c) 2011, 2014, 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/javaClasses.hpp" |
| #include "classfile/systemDictionary.hpp" |
| #include "gc_implementation/shared/markSweep.inline.hpp" |
| #include "gc_interface/collectedHeap.inline.hpp" |
| #include "memory/genOopClosures.inline.hpp" |
| #include "memory/iterator.inline.hpp" |
| #include "memory/oopFactory.hpp" |
| #include "oops/instanceKlass.hpp" |
| #include "oops/instanceMirrorKlass.hpp" |
| #include "oops/instanceOop.hpp" |
| #include "oops/oop.inline.hpp" |
| #include "oops/symbol.hpp" |
| #include "runtime/handles.inline.hpp" |
| #include "utilities/macros.hpp" |
| #if INCLUDE_ALL_GCS |
| #include "gc_implementation/concurrentMarkSweep/cmsOopClosures.inline.hpp" |
| #include "gc_implementation/g1/g1CollectedHeap.inline.hpp" |
| #include "gc_implementation/g1/g1OopClosures.inline.hpp" |
| #include "gc_implementation/g1/g1RemSet.inline.hpp" |
| #include "gc_implementation/g1/heapRegionManager.inline.hpp" |
| #include "gc_implementation/parNew/parOopClosures.inline.hpp" |
| #include "gc_implementation/parallelScavenge/psPromotionManager.inline.hpp" |
| #include "gc_implementation/parallelScavenge/psScavenge.inline.hpp" |
| #include "oops/oop.pcgc.inline.hpp" |
| #endif // INCLUDE_ALL_GCS |
| |
| int InstanceMirrorKlass::_offset_of_static_fields = 0; |
| |
| #ifdef ASSERT |
| template <class T> void assert_is_in(T *p) { |
| T heap_oop = oopDesc::load_heap_oop(p); |
| if (!oopDesc::is_null(heap_oop)) { |
| oop o = oopDesc::decode_heap_oop_not_null(heap_oop); |
| assert(Universe::heap()->is_in(o), "should be in heap"); |
| } |
| } |
| template <class T> void assert_is_in_closed_subset(T *p) { |
| T heap_oop = oopDesc::load_heap_oop(p); |
| if (!oopDesc::is_null(heap_oop)) { |
| oop o = oopDesc::decode_heap_oop_not_null(heap_oop); |
| assert(Universe::heap()->is_in_closed_subset(o), "should be in closed"); |
| } |
| } |
| template <class T> void assert_is_in_reserved(T *p) { |
| T heap_oop = oopDesc::load_heap_oop(p); |
| if (!oopDesc::is_null(heap_oop)) { |
| oop o = oopDesc::decode_heap_oop_not_null(heap_oop); |
| assert(Universe::heap()->is_in_reserved(o), "should be in reserved"); |
| } |
| } |
| template <class T> void assert_nothing(T *p) {} |
| |
| #else |
| template <class T> void assert_is_in(T *p) {} |
| template <class T> void assert_is_in_closed_subset(T *p) {} |
| template <class T> void assert_is_in_reserved(T *p) {} |
| template <class T> void assert_nothing(T *p) {} |
| #endif // ASSERT |
| |
| #define InstanceMirrorKlass_SPECIALIZED_OOP_ITERATE( \ |
| T, start_p, count, do_oop, \ |
| assert_fn) \ |
| { \ |
| T* p = (T*)(start_p); \ |
| T* const end = p + (count); \ |
| while (p < end) { \ |
| (assert_fn)(p); \ |
| do_oop; \ |
| ++p; \ |
| } \ |
| } |
| |
| #define InstanceMirrorKlass_SPECIALIZED_BOUNDED_OOP_ITERATE( \ |
| T, start_p, count, low, high, \ |
| do_oop, assert_fn) \ |
| { \ |
| T* const l = (T*)(low); \ |
| T* const h = (T*)(high); \ |
| assert(mask_bits((intptr_t)l, sizeof(T)-1) == 0 && \ |
| mask_bits((intptr_t)h, sizeof(T)-1) == 0, \ |
| "bounded region must be properly aligned"); \ |
| T* p = (T*)(start_p); \ |
| T* end = p + (count); \ |
| if (p < l) p = l; \ |
| if (end > h) end = h; \ |
| while (p < end) { \ |
| (assert_fn)(p); \ |
| do_oop; \ |
| ++p; \ |
| } \ |
| } |
| |
| |
| #define InstanceMirrorKlass_OOP_ITERATE(start_p, count, \ |
| do_oop, assert_fn) \ |
| { \ |
| if (UseCompressedOops) { \ |
| InstanceMirrorKlass_SPECIALIZED_OOP_ITERATE(narrowOop, \ |
| start_p, count, \ |
| do_oop, assert_fn) \ |
| } else { \ |
| InstanceMirrorKlass_SPECIALIZED_OOP_ITERATE(oop, \ |
| start_p, count, \ |
| do_oop, assert_fn) \ |
| } \ |
| } |
| |
| // The following macros call specialized macros, passing either oop or |
| // narrowOop as the specialization type. These test the UseCompressedOops |
| // flag. |
| #define InstanceMirrorKlass_BOUNDED_OOP_ITERATE(start_p, count, low, high, \ |
| do_oop, assert_fn) \ |
| { \ |
| if (UseCompressedOops) { \ |
| InstanceMirrorKlass_SPECIALIZED_BOUNDED_OOP_ITERATE(narrowOop, \ |
| start_p, count, \ |
| low, high, \ |
| do_oop, assert_fn) \ |
| } else { \ |
| InstanceMirrorKlass_SPECIALIZED_BOUNDED_OOP_ITERATE(oop, \ |
| start_p, count, \ |
| low, high, \ |
| do_oop, assert_fn) \ |
| } \ |
| } |
| |
| |
| void InstanceMirrorKlass::oop_follow_contents(oop obj) { |
| InstanceKlass::oop_follow_contents(obj); |
| |
| // Follow the klass field in the mirror. |
| Klass* klass = java_lang_Class::as_Klass(obj); |
| if (klass != NULL) { |
| // An anonymous class doesn't have its own class loader, so the call |
| // to follow_klass will mark and push its java mirror instead of the |
| // class loader. When handling the java mirror for an anonymous class |
| // we need to make sure its class loader data is claimed, this is done |
| // by calling follow_class_loader explicitly. For non-anonymous classes |
| // the call to follow_class_loader is made when the class loader itself |
| // is handled. |
| if (klass->oop_is_instance() && InstanceKlass::cast(klass)->is_anonymous()) { |
| MarkSweep::follow_class_loader(klass->class_loader_data()); |
| } else { |
| MarkSweep::follow_klass(klass); |
| } |
| } else { |
| // If klass is NULL then this a mirror for a primitive type. |
| // We don't have to follow them, since they are handled as strong |
| // roots in Universe::oops_do. |
| assert(java_lang_Class::is_primitive(obj), "Sanity check"); |
| } |
| |
| InstanceMirrorKlass_OOP_ITERATE( \ |
| start_of_static_fields(obj), java_lang_Class::static_oop_field_count(obj), \ |
| MarkSweep::mark_and_push(p), \ |
| assert_is_in_closed_subset) |
| } |
| |
| #if INCLUDE_ALL_GCS |
| void InstanceMirrorKlass::oop_follow_contents(ParCompactionManager* cm, |
| oop obj) { |
| InstanceKlass::oop_follow_contents(cm, obj); |
| |
| // Follow the klass field in the mirror. |
| Klass* klass = java_lang_Class::as_Klass(obj); |
| if (klass != NULL) { |
| // An anonymous class doesn't have its own class loader, so the call |
| // to follow_klass will mark and push its java mirror instead of the |
| // class loader. When handling the java mirror for an anonymous class |
| // we need to make sure its class loader data is claimed, this is done |
| // by calling follow_class_loader explicitly. For non-anonymous classes |
| // the call to follow_class_loader is made when the class loader itself |
| // is handled. |
| if (klass->oop_is_instance() && InstanceKlass::cast(klass)->is_anonymous()) { |
| PSParallelCompact::follow_class_loader(cm, klass->class_loader_data()); |
| } else { |
| PSParallelCompact::follow_klass(cm, klass); |
| } |
| } else { |
| // If klass is NULL then this a mirror for a primitive type. |
| // We don't have to follow them, since they are handled as strong |
| // roots in Universe::oops_do. |
| assert(java_lang_Class::is_primitive(obj), "Sanity check"); |
| } |
| |
| InstanceMirrorKlass_OOP_ITERATE( \ |
| start_of_static_fields(obj), java_lang_Class::static_oop_field_count(obj), \ |
| PSParallelCompact::mark_and_push(cm, p), \ |
| assert_is_in) |
| } |
| #endif // INCLUDE_ALL_GCS |
| |
| int InstanceMirrorKlass::oop_adjust_pointers(oop obj) { |
| int size = oop_size(obj); |
| InstanceKlass::oop_adjust_pointers(obj); |
| |
| InstanceMirrorKlass_OOP_ITERATE( \ |
| start_of_static_fields(obj), java_lang_Class::static_oop_field_count(obj), \ |
| MarkSweep::adjust_pointer(p), \ |
| assert_nothing) |
| return size; |
| } |
| |
| #define InstanceMirrorKlass_SPECIALIZED_OOP_ITERATE_DEFN(T, nv_suffix) \ |
| InstanceMirrorKlass_OOP_ITERATE( \ |
| start_of_static_fields(obj), java_lang_Class::static_oop_field_count(obj), \ |
| (closure)->do_oop##nv_suffix(p), \ |
| assert_is_in_closed_subset) \ |
| return oop_size(obj); \ |
| |
| #define InstanceMirrorKlass_BOUNDED_SPECIALIZED_OOP_ITERATE(T, nv_suffix, mr) \ |
| InstanceMirrorKlass_BOUNDED_OOP_ITERATE( \ |
| start_of_static_fields(obj), java_lang_Class::static_oop_field_count(obj), \ |
| mr.start(), mr.end(), \ |
| (closure)->do_oop##nv_suffix(p), \ |
| assert_is_in_closed_subset) \ |
| return oop_size(obj); \ |
| |
| |
| // Macro to define InstanceMirrorKlass::oop_oop_iterate for virtual/nonvirtual for |
| // all closures. Macros calling macros above for each oop size. |
| |
| #define InstanceMirrorKlass_OOP_OOP_ITERATE_DEFN(OopClosureType, nv_suffix) \ |
| \ |
| int InstanceMirrorKlass:: \ |
| oop_oop_iterate##nv_suffix(oop obj, OopClosureType* closure) { \ |
| /* Get size before changing pointers */ \ |
| SpecializationStats::record_iterate_call##nv_suffix(SpecializationStats::irk); \ |
| \ |
| InstanceKlass::oop_oop_iterate##nv_suffix(obj, closure); \ |
| \ |
| if_do_metadata_checked(closure, nv_suffix) { \ |
| Klass* klass = java_lang_Class::as_Klass(obj); \ |
| /* We'll get NULL for primitive mirrors. */ \ |
| if (klass != NULL) { \ |
| closure->do_klass##nv_suffix(klass); \ |
| } \ |
| } \ |
| \ |
| if (UseCompressedOops) { \ |
| InstanceMirrorKlass_SPECIALIZED_OOP_ITERATE_DEFN(narrowOop, nv_suffix); \ |
| } else { \ |
| InstanceMirrorKlass_SPECIALIZED_OOP_ITERATE_DEFN(oop, nv_suffix); \ |
| } \ |
| } |
| |
| #if INCLUDE_ALL_GCS |
| #define InstanceMirrorKlass_OOP_OOP_ITERATE_BACKWARDS_DEFN(OopClosureType, nv_suffix) \ |
| \ |
| int InstanceMirrorKlass:: \ |
| oop_oop_iterate_backwards##nv_suffix(oop obj, OopClosureType* closure) { \ |
| /* Get size before changing pointers */ \ |
| SpecializationStats::record_iterate_call##nv_suffix(SpecializationStats::irk); \ |
| \ |
| InstanceKlass::oop_oop_iterate_backwards##nv_suffix(obj, closure); \ |
| \ |
| if (UseCompressedOops) { \ |
| InstanceMirrorKlass_SPECIALIZED_OOP_ITERATE_DEFN(narrowOop, nv_suffix); \ |
| } else { \ |
| InstanceMirrorKlass_SPECIALIZED_OOP_ITERATE_DEFN(oop, nv_suffix); \ |
| } \ |
| } |
| #endif // INCLUDE_ALL_GCS |
| |
| |
| #define InstanceMirrorKlass_OOP_OOP_ITERATE_DEFN_m(OopClosureType, nv_suffix) \ |
| \ |
| int InstanceMirrorKlass:: \ |
| oop_oop_iterate##nv_suffix##_m(oop obj, \ |
| OopClosureType* closure, \ |
| MemRegion mr) { \ |
| SpecializationStats::record_iterate_call##nv_suffix(SpecializationStats::irk); \ |
| \ |
| InstanceKlass::oop_oop_iterate##nv_suffix##_m(obj, closure, mr); \ |
| \ |
| if_do_metadata_checked(closure, nv_suffix) { \ |
| if (mr.contains(obj)) { \ |
| Klass* klass = java_lang_Class::as_Klass(obj); \ |
| /* We'll get NULL for primitive mirrors. */ \ |
| if (klass != NULL) { \ |
| closure->do_klass##nv_suffix(klass); \ |
| } \ |
| } \ |
| } \ |
| \ |
| if (UseCompressedOops) { \ |
| InstanceMirrorKlass_BOUNDED_SPECIALIZED_OOP_ITERATE(narrowOop, nv_suffix, mr); \ |
| } else { \ |
| InstanceMirrorKlass_BOUNDED_SPECIALIZED_OOP_ITERATE(oop, nv_suffix, mr); \ |
| } \ |
| } |
| |
| ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceMirrorKlass_OOP_OOP_ITERATE_DEFN) |
| ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceMirrorKlass_OOP_OOP_ITERATE_DEFN) |
| #if INCLUDE_ALL_GCS |
| ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceMirrorKlass_OOP_OOP_ITERATE_BACKWARDS_DEFN) |
| ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceMirrorKlass_OOP_OOP_ITERATE_BACKWARDS_DEFN) |
| #endif // INCLUDE_ALL_GCS |
| ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceMirrorKlass_OOP_OOP_ITERATE_DEFN_m) |
| ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceMirrorKlass_OOP_OOP_ITERATE_DEFN_m) |
| |
| #if INCLUDE_ALL_GCS |
| void InstanceMirrorKlass::oop_push_contents(PSPromotionManager* pm, oop obj) { |
| // Note that we don't have to follow the mirror -> klass pointer, since all |
| // klasses that are dirty will be scavenged when we iterate over the |
| // ClassLoaderData objects. |
| |
| InstanceKlass::oop_push_contents(pm, obj); |
| InstanceMirrorKlass_OOP_ITERATE( \ |
| start_of_static_fields(obj), java_lang_Class::static_oop_field_count(obj),\ |
| if (PSScavenge::should_scavenge(p)) { \ |
| pm->claim_or_forward_depth(p); \ |
| }, \ |
| assert_nothing ) |
| } |
| |
| int InstanceMirrorKlass::oop_update_pointers(ParCompactionManager* cm, oop obj) { |
| int size = oop_size(obj); |
| InstanceKlass::oop_update_pointers(cm, obj); |
| |
| InstanceMirrorKlass_OOP_ITERATE( \ |
| start_of_static_fields(obj), java_lang_Class::static_oop_field_count(obj),\ |
| PSParallelCompact::adjust_pointer(p), \ |
| assert_nothing) |
| return size; |
| } |
| #endif // INCLUDE_ALL_GCS |
| |
| int InstanceMirrorKlass::instance_size(KlassHandle k) { |
| if (k() != NULL && k->oop_is_instance()) { |
| return align_object_size(size_helper() + InstanceKlass::cast(k())->static_field_size()); |
| } |
| return size_helper(); |
| } |
| |
| instanceOop InstanceMirrorKlass::allocate_instance(KlassHandle k, TRAPS) { |
| // Query before forming handle. |
| int size = instance_size(k); |
| KlassHandle h_k(THREAD, this); |
| instanceOop i = (instanceOop)CollectedHeap::obj_allocate(h_k, size, CHECK_NULL); |
| |
| // Since mirrors can be variable sized because of the static fields, store |
| // the size in the mirror itself. |
| java_lang_Class::set_oop_size(i, size); |
| |
| return i; |
| } |
| |
| int InstanceMirrorKlass::oop_size(oop obj) const { |
| return java_lang_Class::oop_size(obj); |
| } |
| |
| int InstanceMirrorKlass::compute_static_oop_field_count(oop obj) { |
| Klass* k = java_lang_Class::as_Klass(obj); |
| if (k != NULL && k->oop_is_instance()) { |
| return InstanceKlass::cast(k)->static_oop_field_count(); |
| } |
| return 0; |
| } |
