jdk8-mips64-public/hotspot: src/share/vm/oops/instanceKlassKlass.cpp@e1162778c1c8 (annotated)

src/share/vm/oops/instanceKlassKlass.cpp@e1162778c1c8 (annotated)

src/share/vm/oops/instanceKlassKlass.cpp

Thu, 07 Apr 2011 09:53:20 -0700

author: johnc
date: Thu, 07 Apr 2011 09:53:20 -0700
changeset 2781: e1162778c1c8
parent 2658: c7f3d0b4570f
child 2742: ed69575596ac
permissions: -rw-r--r--

7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
Summary: A referent object that is only weakly reachable at the start of concurrent marking but is re-attached to the strongly reachable object graph during marking may not be marked as live. This can cause the reference object to be processed prematurely and leave dangling pointers to the referent object. Implement a read barrier for the java.lang.ref.Reference::referent field by intrinsifying the Reference.get() method, and intercepting accesses though JNI, reflection, and Unsafe, so that when a non-null referent object is read it is also logged in an SATB buffer.
Reviewed-by: kvn, iveresov, never, tonyp, dholmes

 /*
  * Copyright (c) 1997, 2011, 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 "interpreter/oopMapCache.hpp"
 #include "memory/gcLocker.hpp"
 #include "oops/constantPoolOop.hpp"
 #include "oops/instanceKlass.hpp"
 #include "oops/instanceMirrorKlass.hpp"
 #include "oops/instanceKlassKlass.hpp"
 #include "oops/instanceRefKlass.hpp"
 #include "oops/objArrayKlassKlass.hpp"
 #include "oops/objArrayOop.hpp"
 #include "oops/oop.inline.hpp"
 #include "oops/oop.inline2.hpp"
 #include "oops/symbol.hpp"
 #include "oops/typeArrayOop.hpp"
 #include "prims/jvmtiExport.hpp"
 #include "runtime/fieldDescriptor.hpp"
 #ifndef SERIALGC
 #include "gc_implementation/parNew/parOopClosures.inline.hpp"
 #include "gc_implementation/parallelScavenge/psPromotionManager.inline.hpp"
 #include "gc_implementation/parallelScavenge/psScavenge.inline.hpp"
 #include "memory/cardTableRS.hpp"
 #include "oops/oop.pcgc.inline.hpp"
 #endif
 klassOop instanceKlassKlass::create_klass(TRAPS) {
   instanceKlassKlass o;
   KlassHandle h_this_klass(THREAD, Universe::klassKlassObj());
   KlassHandle k = base_create_klass(h_this_klass, header_size(), o.vtbl_value(), CHECK_NULL);
   // Make sure size calculation is right
   assert(k()->size() == align_object_size(header_size()), "wrong size for object");
   java_lang_Class::create_mirror(k, CHECK_NULL); // Allocate mirror
   return k();
 }
 int instanceKlassKlass::oop_size(oop obj) const {
   assert(obj->is_klass(), "must be klass");
   return instanceKlass::cast(klassOop(obj))->object_size();
 }
 bool instanceKlassKlass::oop_is_parsable(oop obj) const {
   assert(obj->is_klass(), "must be klass");
   instanceKlass* ik = instanceKlass::cast(klassOop(obj));
   return (!ik->null_vtbl()) && ik->object_is_parsable();
 }
 void instanceKlassKlass::iterate_c_heap_oops(instanceKlass* ik,
                                              OopClosure* closure) {
   if (ik->oop_map_cache() != NULL) {
     ik->oop_map_cache()->oop_iterate(closure);
   }
   if (ik->jni_ids() != NULL) {
     ik->jni_ids()->oops_do(closure);
   }
 }
 void instanceKlassKlass::oop_follow_contents(oop obj) {
   assert(obj->is_klass(),"must be a klass");
   assert(klassOop(obj)->klass_part()->oop_is_instance_slow(), "must be instance klass");
   instanceKlass* ik = instanceKlass::cast(klassOop(obj));
   {
     HandleMark hm;
     ik->vtable()->oop_follow_contents();
     ik->itable()->oop_follow_contents();
   }
   MarkSweep::mark_and_push(ik->adr_array_klasses());
   MarkSweep::mark_and_push(ik->adr_methods());
   MarkSweep::mark_and_push(ik->adr_method_ordering());
   MarkSweep::mark_and_push(ik->adr_local_interfaces());
   MarkSweep::mark_and_push(ik->adr_transitive_interfaces());
   MarkSweep::mark_and_push(ik->adr_fields());
   MarkSweep::mark_and_push(ik->adr_constants());
   MarkSweep::mark_and_push(ik->adr_class_loader());
   MarkSweep::mark_and_push(ik->adr_inner_classes());
   MarkSweep::mark_and_push(ik->adr_protection_domain());
   MarkSweep::mark_and_push(ik->adr_host_klass());
   MarkSweep::mark_and_push(ik->adr_signers());
   MarkSweep::mark_and_push(ik->adr_bootstrap_method());
   MarkSweep::mark_and_push(ik->adr_class_annotations());
   MarkSweep::mark_and_push(ik->adr_fields_annotations());
   MarkSweep::mark_and_push(ik->adr_methods_annotations());
   MarkSweep::mark_and_push(ik->adr_methods_parameter_annotations());
   MarkSweep::mark_and_push(ik->adr_methods_default_annotations());
   // We do not follow adr_implementors() here. It is followed later
   // in instanceKlass::follow_weak_klass_links()
   klassKlass::oop_follow_contents(obj);
   iterate_c_heap_oops(ik, &MarkSweep::mark_and_push_closure);
 }
 #ifndef SERIALGC
 void instanceKlassKlass::oop_follow_contents(ParCompactionManager* cm,
                                              oop obj) {
   assert(obj->is_klass(),"must be a klass");
   assert(klassOop(obj)->klass_part()->oop_is_instance_slow(), "must be instance klass");
   instanceKlass* ik = instanceKlass::cast(klassOop(obj));
   ik->vtable()->oop_follow_contents(cm);
   ik->itable()->oop_follow_contents(cm);
   PSParallelCompact::mark_and_push(cm, ik->adr_array_klasses());
   PSParallelCompact::mark_and_push(cm, ik->adr_methods());
   PSParallelCompact::mark_and_push(cm, ik->adr_method_ordering());
   PSParallelCompact::mark_and_push(cm, ik->adr_local_interfaces());
   PSParallelCompact::mark_and_push(cm, ik->adr_transitive_interfaces());
   PSParallelCompact::mark_and_push(cm, ik->adr_fields());
   PSParallelCompact::mark_and_push(cm, ik->adr_constants());
   PSParallelCompact::mark_and_push(cm, ik->adr_class_loader());
   PSParallelCompact::mark_and_push(cm, ik->adr_inner_classes());
   PSParallelCompact::mark_and_push(cm, ik->adr_protection_domain());
   PSParallelCompact::mark_and_push(cm, ik->adr_host_klass());
   PSParallelCompact::mark_and_push(cm, ik->adr_signers());
   PSParallelCompact::mark_and_push(cm, ik->adr_bootstrap_method());
   PSParallelCompact::mark_and_push(cm, ik->adr_class_annotations());
   PSParallelCompact::mark_and_push(cm, ik->adr_fields_annotations());
   PSParallelCompact::mark_and_push(cm, ik->adr_methods_annotations());
   PSParallelCompact::mark_and_push(cm, ik->adr_methods_parameter_annotations());
   PSParallelCompact::mark_and_push(cm, ik->adr_methods_default_annotations());
   // We do not follow adr_implementor() here. It is followed later
   // in instanceKlass::follow_weak_klass_links()
   klassKlass::oop_follow_contents(cm, obj);
   PSParallelCompact::MarkAndPushClosure mark_and_push_closure(cm);
   iterate_c_heap_oops(ik, &mark_and_push_closure);
 }
 #endif // SERIALGC
 int instanceKlassKlass::oop_oop_iterate(oop obj, OopClosure* blk) {
   assert(obj->is_klass(),"must be a klass");
   assert(klassOop(obj)->klass_part()->oop_is_instance_slow(), "must be instance klass");
   instanceKlass* ik = instanceKlass::cast(klassOop(obj));
   // Get size before changing pointers.
   // Don't call size() or oop_size() since that is a virtual call.
   int size = ik->object_size();
   ik->vtable()->oop_oop_iterate(blk);
   ik->itable()->oop_oop_iterate(blk);
   blk->do_oop(ik->adr_array_klasses());
   blk->do_oop(ik->adr_methods());
   blk->do_oop(ik->adr_method_ordering());
   blk->do_oop(ik->adr_local_interfaces());
   blk->do_oop(ik->adr_transitive_interfaces());
   blk->do_oop(ik->adr_fields());
   blk->do_oop(ik->adr_constants());
   blk->do_oop(ik->adr_class_loader());
   blk->do_oop(ik->adr_protection_domain());
   blk->do_oop(ik->adr_host_klass());
   blk->do_oop(ik->adr_signers());
   blk->do_oop(ik->adr_inner_classes());
   for (int i = 0; i < instanceKlass::implementors_limit; i++) {
     blk->do_oop(&ik->adr_implementors()[i]);
   }
   blk->do_oop(ik->adr_bootstrap_method());
   blk->do_oop(ik->adr_class_annotations());
   blk->do_oop(ik->adr_fields_annotations());
   blk->do_oop(ik->adr_methods_annotations());
   blk->do_oop(ik->adr_methods_parameter_annotations());
   blk->do_oop(ik->adr_methods_default_annotations());
   klassKlass::oop_oop_iterate(obj, blk);
   if(ik->oop_map_cache() != NULL) ik->oop_map_cache()->oop_iterate(blk);
   return size;
 }
 int instanceKlassKlass::oop_oop_iterate_m(oop obj, OopClosure* blk,
                                            MemRegion mr) {
   assert(obj->is_klass(),"must be a klass");
   assert(klassOop(obj)->klass_part()->oop_is_instance_slow(), "must be instance klass");
   instanceKlass* ik = instanceKlass::cast(klassOop(obj));
   // Get size before changing pointers.
   // Don't call size() or oop_size() since that is a virtual call.
   int size = ik->object_size();
   ik->vtable()->oop_oop_iterate_m(blk, mr);
   ik->itable()->oop_oop_iterate_m(blk, mr);
   oop* adr;
   adr = ik->adr_array_klasses();
   if (mr.contains(adr)) blk->do_oop(adr);
   adr = ik->adr_methods();
   if (mr.contains(adr)) blk->do_oop(adr);
   adr = ik->adr_method_ordering();
   if (mr.contains(adr)) blk->do_oop(adr);
   adr = ik->adr_local_interfaces();
   if (mr.contains(adr)) blk->do_oop(adr);
   adr = ik->adr_transitive_interfaces();
   if (mr.contains(adr)) blk->do_oop(adr);
   adr = ik->adr_fields();
   if (mr.contains(adr)) blk->do_oop(adr);
   adr = ik->adr_constants();
   if (mr.contains(adr)) blk->do_oop(adr);
   adr = ik->adr_class_loader();
   if (mr.contains(adr)) blk->do_oop(adr);
   adr = ik->adr_protection_domain();
   if (mr.contains(adr)) blk->do_oop(adr);
   adr = ik->adr_host_klass();
   if (mr.contains(adr)) blk->do_oop(adr);
   adr = ik->adr_signers();
   if (mr.contains(adr)) blk->do_oop(adr);
   adr = ik->adr_inner_classes();
   if (mr.contains(adr)) blk->do_oop(adr);
   adr = ik->adr_implementors();
   for (int i = 0; i < instanceKlass::implementors_limit; i++) {
     if (mr.contains(&adr[i])) blk->do_oop(&adr[i]);
   }
   adr = ik->adr_bootstrap_method();
   if (mr.contains(adr)) blk->do_oop(adr);
   adr = ik->adr_class_annotations();
   if (mr.contains(adr)) blk->do_oop(adr);
   adr = ik->adr_fields_annotations();
   if (mr.contains(adr)) blk->do_oop(adr);
   adr = ik->adr_methods_annotations();
   if (mr.contains(adr)) blk->do_oop(adr);
   adr = ik->adr_methods_parameter_annotations();
   if (mr.contains(adr)) blk->do_oop(adr);
   adr = ik->adr_methods_default_annotations();
   if (mr.contains(adr)) blk->do_oop(adr);
   klassKlass::oop_oop_iterate_m(obj, blk, mr);
   if(ik->oop_map_cache() != NULL) ik->oop_map_cache()->oop_iterate(blk, mr);
   return size;
 }
 int instanceKlassKlass::oop_adjust_pointers(oop obj) {
   assert(obj->is_klass(),"must be a klass");
   assert(klassOop(obj)->klass_part()->oop_is_instance_slow(), "must be instance klass");
   instanceKlass* ik = instanceKlass::cast(klassOop(obj));
   ik->vtable()->oop_adjust_pointers();
   ik->itable()->oop_adjust_pointers();
   MarkSweep::adjust_pointer(ik->adr_array_klasses());
   MarkSweep::adjust_pointer(ik->adr_methods());
   MarkSweep::adjust_pointer(ik->adr_method_ordering());
   MarkSweep::adjust_pointer(ik->adr_local_interfaces());
   MarkSweep::adjust_pointer(ik->adr_transitive_interfaces());
   MarkSweep::adjust_pointer(ik->adr_fields());
   MarkSweep::adjust_pointer(ik->adr_constants());
   MarkSweep::adjust_pointer(ik->adr_class_loader());
   MarkSweep::adjust_pointer(ik->adr_protection_domain());
   MarkSweep::adjust_pointer(ik->adr_host_klass());
   MarkSweep::adjust_pointer(ik->adr_signers());
   MarkSweep::adjust_pointer(ik->adr_inner_classes());
   for (int i = 0; i < instanceKlass::implementors_limit; i++) {
     MarkSweep::adjust_pointer(&ik->adr_implementors()[i]);
   }
   MarkSweep::adjust_pointer(ik->adr_bootstrap_method());
   MarkSweep::adjust_pointer(ik->adr_class_annotations());
   MarkSweep::adjust_pointer(ik->adr_fields_annotations());
   MarkSweep::adjust_pointer(ik->adr_methods_annotations());
   MarkSweep::adjust_pointer(ik->adr_methods_parameter_annotations());
   MarkSweep::adjust_pointer(ik->adr_methods_default_annotations());
   iterate_c_heap_oops(ik, &MarkSweep::adjust_root_pointer_closure);
   return klassKlass::oop_adjust_pointers(obj);
 }
 #ifndef SERIALGC
 void instanceKlassKlass::oop_push_contents(PSPromotionManager* pm, oop obj) {
   instanceKlass* ik = instanceKlass::cast(klassOop(obj));
   oop* loader_addr = ik->adr_class_loader();
   if (PSScavenge::should_scavenge(loader_addr)) {
     pm->claim_or_forward_depth(loader_addr);
   }
   oop* pd_addr = ik->adr_protection_domain();
   if (PSScavenge::should_scavenge(pd_addr)) {
     pm->claim_or_forward_depth(pd_addr);
   }
   oop* hk_addr = ik->adr_host_klass();
   if (PSScavenge::should_scavenge(hk_addr)) {
     pm->claim_or_forward_depth(hk_addr);
   }
   oop* sg_addr = ik->adr_signers();
   if (PSScavenge::should_scavenge(sg_addr)) {
     pm->claim_or_forward_depth(sg_addr);
   }
   oop* bsm_addr = ik->adr_bootstrap_method();
   if (PSScavenge::should_scavenge(bsm_addr)) {
     pm->claim_or_forward_depth(bsm_addr);
   }
   klassKlass::oop_push_contents(pm, obj);
 }
 int instanceKlassKlass::oop_update_pointers(ParCompactionManager* cm, oop obj) {
   assert(obj->is_klass(),"must be a klass");
   assert(klassOop(obj)->klass_part()->oop_is_instance_slow(),
          "must be instance klass");
   instanceKlass* ik = instanceKlass::cast(klassOop(obj));
   ik->vtable()->oop_update_pointers(cm);
   ik->itable()->oop_update_pointers(cm);
   oop* const beg_oop = ik->oop_block_beg();
   oop* const end_oop = ik->oop_block_end();
   for (oop* cur_oop = beg_oop; cur_oop < end_oop; ++cur_oop) {
     PSParallelCompact::adjust_pointer(cur_oop);
   }
   OopClosure* closure = PSParallelCompact::adjust_root_pointer_closure();
   iterate_c_heap_oops(ik, closure);
   klassKlass::oop_update_pointers(cm, obj);
   return ik->object_size();
 }
 #endif // SERIALGC
 klassOop
 instanceKlassKlass::allocate_instance_klass(Symbol* name, int vtable_len, int itable_len,
                                             int static_field_size,
                                             unsigned nonstatic_oop_map_count,
                                             ReferenceType rt, TRAPS) {
   const int nonstatic_oop_map_size =
     instanceKlass::nonstatic_oop_map_size(nonstatic_oop_map_count);
   int size = instanceKlass::object_size(align_object_offset(vtable_len) + align_object_offset(itable_len) + nonstatic_oop_map_size);
   // Allocation
   KlassHandle h_this_klass(THREAD, as_klassOop());
   KlassHandle k;
   if (rt == REF_NONE) {
     if (name != vmSymbols::java_lang_Class()) {
       // regular klass
       instanceKlass o;
       k = base_create_klass(h_this_klass, size, o.vtbl_value(), CHECK_NULL);
     } else {
       // Class
       instanceMirrorKlass o;
       k = base_create_klass(h_this_klass, size, o.vtbl_value(), CHECK_NULL);
     }
   } else {
     // reference klass
     instanceRefKlass o;
     k = base_create_klass(h_this_klass, size, o.vtbl_value(), CHECK_NULL);
   }
   {
     No_Safepoint_Verifier no_safepoint; // until k becomes parsable
     instanceKlass* ik = (instanceKlass*) k()->klass_part();
     assert(!k()->is_parsable(), "not expecting parsability yet.");
     // The sizes of these these three variables are used for determining the
     // size of the instanceKlassOop. It is critical that these are set to the right
     // sizes before the first GC, i.e., when we allocate the mirror.
     ik->set_vtable_length(vtable_len);
     ik->set_itable_length(itable_len);
     ik->set_static_field_size(static_field_size);
     ik->set_nonstatic_oop_map_size(nonstatic_oop_map_size);
     assert(k()->size() == size, "wrong size for object");
     ik->set_array_klasses(NULL);
     ik->set_methods(NULL);
     ik->set_method_ordering(NULL);
     ik->set_local_interfaces(NULL);
     ik->set_transitive_interfaces(NULL);
     ik->init_implementor();
     ik->set_fields(NULL);
     ik->set_constants(NULL);
     ik->set_class_loader(NULL);
     ik->set_protection_domain(NULL);
     ik->set_host_klass(NULL);
     ik->set_signers(NULL);
     ik->set_source_file_name(NULL);
     ik->set_source_debug_extension(NULL);
     ik->set_source_debug_extension(NULL);
     ik->set_array_name(NULL);
     ik->set_inner_classes(NULL);
     ik->set_static_oop_field_count(0);
     ik->set_nonstatic_field_size(0);
     ik->set_is_marked_dependent(false);
     ik->set_init_state(instanceKlass::allocated);
     ik->set_init_thread(NULL);
     ik->set_reference_type(rt);
     ik->set_oop_map_cache(NULL);
     ik->set_jni_ids(NULL);
     ik->set_osr_nmethods_head(NULL);
     ik->set_breakpoints(NULL);
     ik->init_previous_versions();
     ik->set_generic_signature(NULL);
     ik->set_bootstrap_method(NULL);
     ik->release_set_methods_jmethod_ids(NULL);
     ik->release_set_methods_cached_itable_indices(NULL);
     ik->set_class_annotations(NULL);
     ik->set_fields_annotations(NULL);
     ik->set_methods_annotations(NULL);
     ik->set_methods_parameter_annotations(NULL);
     ik->set_methods_default_annotations(NULL);
     ik->set_enclosing_method_indices(0, 0);
     ik->set_jvmti_cached_class_field_map(NULL);
     ik->set_initial_method_idnum(0);
     assert(k()->is_parsable(), "should be parsable here.");
     // initialize the non-header words to zero
     intptr_t* p = (intptr_t*)k();
     for (int index = instanceKlass::header_size(); index < size; index++) {
       p[index] = NULL_WORD;
     }
     // To get verify to work - must be set to partial loaded before first GC point.
     k()->set_partially_loaded();
   }
   return k();
 }
 #ifndef PRODUCT
 // Printing
 #define BULLET  " - "
 static const char* state_names[] = {
   "unparseable_by_gc", "allocated", "loaded", "linked", "being_initialized", "fully_initialized", "initialization_error"
 };
 void instanceKlassKlass::oop_print_on(oop obj, outputStream* st) {
   assert(obj->is_klass(), "must be klass");
   instanceKlass* ik = instanceKlass::cast(klassOop(obj));
   klassKlass::oop_print_on(obj, st);
   st->print(BULLET"instance size:     %d", ik->size_helper());                        st->cr();
   st->print(BULLET"klass size:        %d", ik->object_size());                        st->cr();
   st->print(BULLET"access:            "); ik->access_flags().print_on(st);            st->cr();
   st->print(BULLET"state:             "); st->print_cr(state_names[ik->_init_state]);
   st->print(BULLET"name:              "); ik->name()->print_value_on(st);             st->cr();
   st->print(BULLET"super:             "); ik->super()->print_value_on(st);            st->cr();
   st->print(BULLET"sub:               ");
   Klass* sub = ik->subklass();
   int n;
   for (n = 0; sub != NULL; n++, sub = sub->next_sibling()) {
     if (n < MaxSubklassPrintSize) {
       sub->as_klassOop()->print_value_on(st);
       st->print("   ");
     }
   }
   if (n >= MaxSubklassPrintSize) st->print("(%d more klasses...)", n - MaxSubklassPrintSize);
   st->cr();
   if (ik->is_interface()) {
     st->print_cr(BULLET"nof implementors:  %d", ik->nof_implementors());
     int print_impl = 0;
     for (int i = 0; i < instanceKlass::implementors_limit; i++) {
       if (ik->implementor(i) != NULL) {
         if (++print_impl == 1)
           st->print_cr(BULLET"implementor:    ");
         st->print("   ");
         ik->implementor(i)->print_value_on(st);
       }
     }
     if (print_impl > 0)  st->cr();
   }
   st->print(BULLET"arrays:            "); ik->array_klasses()->print_value_on(st);     st->cr();
   st->print(BULLET"methods:           "); ik->methods()->print_value_on(st);           st->cr();
   if (Verbose) {
     objArrayOop methods = ik->methods();
     for(int i = 0; i < methods->length(); i++) {
       tty->print("%d : ", i); methods->obj_at(i)->print_value(); tty->cr();
     }
   }
   st->print(BULLET"method ordering:   "); ik->method_ordering()->print_value_on(st);       st->cr();
   st->print(BULLET"local interfaces:  "); ik->local_interfaces()->print_value_on(st);      st->cr();
   st->print(BULLET"trans. interfaces: "); ik->transitive_interfaces()->print_value_on(st); st->cr();
   st->print(BULLET"constants:         "); ik->constants()->print_value_on(st);         st->cr();
   st->print(BULLET"class loader:      "); ik->class_loader()->print_value_on(st);      st->cr();
   st->print(BULLET"protection domain: "); ik->protection_domain()->print_value_on(st); st->cr();
   st->print(BULLET"host class:        "); ik->host_klass()->print_value_on(st);        st->cr();
   st->print(BULLET"signers:           "); ik->signers()->print_value_on(st);           st->cr();
   if (ik->source_file_name() != NULL) {
     st->print(BULLET"source file:       ");
     ik->source_file_name()->print_value_on(st);
     st->cr();
   }
   if (ik->source_debug_extension() != NULL) {
     st->print(BULLET"source debug extension:       ");
     ik->source_debug_extension()->print_value_on(st);
     st->cr();
   }
   {
     ResourceMark rm;
     // PreviousVersionInfo objects returned via PreviousVersionWalker
     // contain a GrowableArray of handles. We have to clean up the
     // GrowableArray _after_ the PreviousVersionWalker destructor
     // has destroyed the handles.
     {
       bool have_pv = false;
       PreviousVersionWalker pvw(ik);
       for (PreviousVersionInfo * pv_info = pvw.next_previous_version();
            pv_info != NULL; pv_info = pvw.next_previous_version()) {
         if (!have_pv)
           st->print(BULLET"previous version:  ");
         have_pv = true;
         pv_info->prev_constant_pool_handle()()->print_value_on(st);
       }
       if (have_pv)  st->cr();
     } // pvw is cleaned up
   } // rm is cleaned up
   if (ik->bootstrap_method() != NULL) {
     st->print(BULLET"bootstrap method:  ");
     ik->bootstrap_method()->print_value_on(st);
     st->cr();
   }
   if (ik->generic_signature() != NULL) {
     st->print(BULLET"generic signature: ");
     ik->generic_signature()->print_value_on(st);
     st->cr();
   }
   st->print(BULLET"inner classes:     "); ik->inner_classes()->print_value_on(st);     st->cr();
   st->print(BULLET"java mirror:       "); ik->java_mirror()->print_value_on(st);       st->cr();
   st->print(BULLET"vtable length      %d  (start addr: " INTPTR_FORMAT ")", ik->vtable_length(), ik->start_of_vtable());  st->cr();
   st->print(BULLET"itable length      %d (start addr: " INTPTR_FORMAT ")", ik->itable_length(), ik->start_of_itable()); st->cr();
   st->print_cr(BULLET"---- static fields (%d words):", ik->static_field_size());
   FieldPrinter print_static_field(st);
   ik->do_local_static_fields(&print_static_field);
   st->print_cr(BULLET"---- non-static fields (%d words):", ik->nonstatic_field_size());
   FieldPrinter print_nonstatic_field(st);
   ik->do_nonstatic_fields(&print_nonstatic_field);
   st->print(BULLET"non-static oop maps: ");
   OopMapBlock* map     = ik->start_of_nonstatic_oop_maps();
   OopMapBlock* end_map = map + ik->nonstatic_oop_map_count();
   while (map < end_map) {
     st->print("%d-%d ", map->offset(), map->offset() + heapOopSize*(map->count() - 1));
     map++;
   }
   st->cr();
 }
 #endif //PRODUCT
 void instanceKlassKlass::oop_print_value_on(oop obj, outputStream* st) {
   assert(obj->is_klass(), "must be klass");
   instanceKlass* ik = instanceKlass::cast(klassOop(obj));
   ik->name()->print_value_on(st);
 }
 const char* instanceKlassKlass::internal_name() const {
   return "{instance class}";
 }
 // Verification
 class VerifyFieldClosure: public OopClosure {
  protected:
   template <class T> void do_oop_work(T* p) {
     guarantee(Universe::heap()->is_in(p), "should be in heap");
     oop obj = oopDesc::load_decode_heap_oop(p);
     guarantee(obj->is_oop_or_null(), "should be in heap");
   }
  public:
   virtual void do_oop(oop* p)       { VerifyFieldClosure::do_oop_work(p); }
   virtual void do_oop(narrowOop* p) { VerifyFieldClosure::do_oop_work(p); }
 };
 void instanceKlassKlass::oop_verify_on(oop obj, outputStream* st) {
   klassKlass::oop_verify_on(obj, st);
   if (!obj->partially_loaded()) {
     Thread *thread = Thread::current();
     instanceKlass* ik = instanceKlass::cast(klassOop(obj));
 #ifndef PRODUCT
     // Avoid redundant verifies
     if (ik->_verify_count == Universe::verify_count()) return;
     ik->_verify_count = Universe::verify_count();
 #endif
     // Verify that klass is present in SystemDictionary
     if (ik->is_loaded() && !ik->is_anonymous()) {
       Symbol* h_name = ik->name();
       Handle h_loader (thread, ik->class_loader());
       Handle h_obj(thread, obj);
       SystemDictionary::verify_obj_klass_present(h_obj, h_name, h_loader);
     }
     // Verify static fields
     VerifyFieldClosure blk;
     // Verify vtables
     if (ik->is_linked()) {
       ResourceMark rm(thread);
       // $$$ This used to be done only for m/s collections.  Doing it
       // always seemed a valid generalization.  (DLD -- 6/00)
       ik->vtable()->verify(st);
     }
     // Verify oop map cache
     if (ik->oop_map_cache() != NULL) {
       ik->oop_map_cache()->verify();
     }
     // Verify first subklass
     if (ik->subklass_oop() != NULL) {
       guarantee(ik->subklass_oop()->is_perm(),  "should be in permspace");
       guarantee(ik->subklass_oop()->is_klass(), "should be klass");
     }
     // Verify siblings
     klassOop super = ik->super();
     Klass* sib = ik->next_sibling();
     int sib_count = 0;
     while (sib != NULL) {
       if (sib == ik) {
         fatal(err_msg("subclass cycle of length %d", sib_count));
       }
       if (sib_count >= 100000) {
         fatal(err_msg("suspiciously long subclass list %d", sib_count));
       }
       guarantee(sib->as_klassOop()->is_klass(), "should be klass");
       guarantee(sib->as_klassOop()->is_perm(),  "should be in permspace");
       guarantee(sib->super() == super, "siblings should have same superklass");
       sib = sib->next_sibling();
     }
     // Verify implementor fields
     bool saw_null_impl = false;
     for (int i = 0; i < instanceKlass::implementors_limit; i++) {
       klassOop im = ik->implementor(i);
       if (im == NULL) { saw_null_impl = true; continue; }
       guarantee(!saw_null_impl, "non-nulls must preceded all nulls");
       guarantee(ik->is_interface(), "only interfaces should have implementor set");
       guarantee(i < ik->nof_implementors(), "should only have one implementor");
       guarantee(im->is_perm(),  "should be in permspace");
       guarantee(im->is_klass(), "should be klass");
       guarantee(!Klass::cast(klassOop(im))->is_interface(), "implementors cannot be interfaces");
     }
     // Verify local interfaces
     objArrayOop local_interfaces = ik->local_interfaces();
     guarantee(local_interfaces->is_perm(),          "should be in permspace");
     guarantee(local_interfaces->is_objArray(),      "should be obj array");
     int j;
     for (j = 0; j < local_interfaces->length(); j++) {
       oop e = local_interfaces->obj_at(j);
       guarantee(e->is_klass() && Klass::cast(klassOop(e))->is_interface(), "invalid local interface");
     }
     // Verify transitive interfaces
     objArrayOop transitive_interfaces = ik->transitive_interfaces();
     guarantee(transitive_interfaces->is_perm(),          "should be in permspace");
     guarantee(transitive_interfaces->is_objArray(),      "should be obj array");
     for (j = 0; j < transitive_interfaces->length(); j++) {
       oop e = transitive_interfaces->obj_at(j);
       guarantee(e->is_klass() && Klass::cast(klassOop(e))->is_interface(), "invalid transitive interface");
     }
     // Verify methods
     objArrayOop methods = ik->methods();
     guarantee(methods->is_perm(),              "should be in permspace");
     guarantee(methods->is_objArray(),          "should be obj array");
     for (j = 0; j < methods->length(); j++) {
       guarantee(methods->obj_at(j)->is_method(), "non-method in methods array");
     }
     for (j = 0; j < methods->length() - 1; j++) {
       methodOop m1 = methodOop(methods->obj_at(j));
       methodOop m2 = methodOop(methods->obj_at(j + 1));
       guarantee(m1->name()->fast_compare(m2->name()) <= 0, "methods not sorted correctly");
     }
     // Verify method ordering
     typeArrayOop method_ordering = ik->method_ordering();
     guarantee(method_ordering->is_perm(),              "should be in permspace");
     guarantee(method_ordering->is_typeArray(),         "should be type array");
     int length = method_ordering->length();
     if (JvmtiExport::can_maintain_original_method_order()) {
       guarantee(length == methods->length(),           "invalid method ordering length");
       jlong sum = 0;
       for (j = 0; j < length; j++) {
         int original_index = method_ordering->int_at(j);
         guarantee(original_index >= 0 && original_index < length, "invalid method ordering index");
         sum += original_index;
       }
       // Verify sum of indices 0,1,...,length-1
       guarantee(sum == ((jlong)length*(length-1))/2,   "invalid method ordering sum");
     } else {
       guarantee(length == 0,                           "invalid method ordering length");
     }
     // Verify JNI static field identifiers
     if (ik->jni_ids() != NULL) {
       ik->jni_ids()->verify(ik->as_klassOop());
     }
     // Verify other fields
     if (ik->array_klasses() != NULL) {
       guarantee(ik->array_klasses()->is_perm(),      "should be in permspace");
       guarantee(ik->array_klasses()->is_klass(),     "should be klass");
     }
     guarantee(ik->fields()->is_perm(),               "should be in permspace");
     guarantee(ik->fields()->is_typeArray(),          "should be type array");
     guarantee(ik->constants()->is_perm(),            "should be in permspace");
     guarantee(ik->constants()->is_constantPool(),    "should be constant pool");
     guarantee(ik->inner_classes()->is_perm(),        "should be in permspace");
     guarantee(ik->inner_classes()->is_typeArray(),   "should be type array");
     if (ik->protection_domain() != NULL) {
       guarantee(ik->protection_domain()->is_oop(),  "should be oop");
     }
     if (ik->host_klass() != NULL) {
       guarantee(ik->host_klass()->is_oop(),  "should be oop");
     }
     if (ik->signers() != NULL) {
       guarantee(ik->signers()->is_objArray(),       "should be obj array");
     }
     if (ik->class_annotations() != NULL) {
       guarantee(ik->class_annotations()->is_typeArray(), "should be type array");
     }
     if (ik->fields_annotations() != NULL) {
       guarantee(ik->fields_annotations()->is_objArray(), "should be obj array");
     }
     if (ik->methods_annotations() != NULL) {
       guarantee(ik->methods_annotations()->is_objArray(), "should be obj array");
     }
     if (ik->methods_parameter_annotations() != NULL) {
       guarantee(ik->methods_parameter_annotations()->is_objArray(), "should be obj array");
     }
     if (ik->methods_default_annotations() != NULL) {
       guarantee(ik->methods_default_annotations()->is_objArray(), "should be obj array");
     }
   }
 }
 bool instanceKlassKlass::oop_partially_loaded(oop obj) const {
   assert(obj->is_klass(), "object must be klass");
   instanceKlass* ik = instanceKlass::cast(klassOop(obj));
   assert(ik->oop_is_instance(), "object must be instanceKlass");
   return ik->transitive_interfaces() == (objArrayOop) obj;   // Check whether transitive_interfaces points to self
 }
 // The transitive_interfaces is the last field set when loading an object.
 void instanceKlassKlass::oop_set_partially_loaded(oop obj) {
   assert(obj->is_klass(), "object must be klass");
   instanceKlass* ik = instanceKlass::cast(klassOop(obj));
   // Set the layout helper to a place-holder value, until fuller initialization.
   // (This allows asserts in oop_is_instance to succeed.)
   ik->set_layout_helper(Klass::instance_layout_helper(0, true));
   assert(ik->oop_is_instance(), "object must be instanceKlass");
   assert(ik->transitive_interfaces() == NULL, "just checking");
   ik->set_transitive_interfaces((objArrayOop) obj);   // Temporarily set transitive_interfaces to point to self
 }

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/oops/instanceKlassKlass.cpp@e1162778c1c8 (annotated)

src/share/vm/oops/instanceKlassKlass.cpp