jdk8-mips64-public/hotspot: src/share/vm/oops/objArrayKlass.cpp@ad72068ac41e (annotated)

src/share/vm/oops/objArrayKlass.cpp@ad72068ac41e (annotated)

src/share/vm/oops/objArrayKlass.cpp

Tue, 10 Dec 2013 10:31:00 +0100

author: sjohanss
date: Tue, 10 Dec 2013 10:31:00 +0100
changeset 6169: ad72068ac41e
parent 6148: 55a0da3d420b
child 6198: 55fb97c4c58d
permissions: -rw-r--r--

8028993: Full collections with ParallelScavenge slower in JDK 8 compared to 7u40
Summary: Reducing the number of calls to follow_class_loader to speed up the marking phase. Also removed some unnecessary calls to adjust_klass.
Reviewed-by: stefank, jmasa, mgerdin

 /*
  * Copyright (c) 1997, 2012, 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/symbolTable.hpp"
 #include "classfile/systemDictionary.hpp"
 #include "classfile/vmSymbols.hpp"
 #include "gc_implementation/shared/markSweep.inline.hpp"
 #include "gc_interface/collectedHeap.inline.hpp"
 #include "memory/genOopClosures.inline.hpp"
 #include "memory/metadataFactory.hpp"
 #include "memory/resourceArea.hpp"
 #include "memory/universe.inline.hpp"
 #include "oops/instanceKlass.hpp"
 #include "oops/klass.inline.hpp"
 #include "oops/objArrayKlass.hpp"
 #include "oops/objArrayKlass.inline.hpp"
 #include "oops/objArrayOop.hpp"
 #include "oops/oop.inline.hpp"
 #include "oops/oop.inline2.hpp"
 #include "oops/symbol.hpp"
 #include "runtime/handles.inline.hpp"
 #include "runtime/mutexLocker.hpp"
 #include "utilities/copy.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/heapRegionSeq.inline.hpp"
 #include "gc_implementation/parNew/parOopClosures.inline.hpp"
 #include "gc_implementation/parallelScavenge/psCompactionManager.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
 ObjArrayKlass* ObjArrayKlass::allocate(ClassLoaderData* loader_data, int n, KlassHandle klass_handle, Symbol* name, TRAPS) {
   assert(ObjArrayKlass::header_size() <= InstanceKlass::header_size(),
       "array klasses must be same size as InstanceKlass");
   int size = ArrayKlass::static_size(ObjArrayKlass::header_size());
   return new (loader_data, size, THREAD) ObjArrayKlass(n, klass_handle, name);
 }
 Klass* ObjArrayKlass::allocate_objArray_klass(ClassLoaderData* loader_data,
                                                 int n, KlassHandle element_klass, TRAPS) {
   // Eagerly allocate the direct array supertype.
   KlassHandle super_klass = KlassHandle();
   if (!Universe::is_bootstrapping() || SystemDictionary::Object_klass_loaded()) {
     KlassHandle element_super (THREAD, element_klass->super());
     if (element_super.not_null()) {
       // The element type has a direct super.  E.g., String[] has direct super of Object[].
       super_klass = KlassHandle(THREAD, element_super->array_klass_or_null());
       bool supers_exist = super_klass.not_null();
       // Also, see if the element has secondary supertypes.
       // We need an array type for each.
       Array<Klass*>* element_supers = element_klass->secondary_supers();
       for( int i = element_supers->length()-1; i >= 0; i-- ) {
         Klass* elem_super = element_supers->at(i);
         if (elem_super->array_klass_or_null() == NULL) {
           supers_exist = false;
           break;
         }
       }
       if (!supers_exist) {
         // Oops.  Not allocated yet.  Back out, allocate it, and retry.
         KlassHandle ek;
         {
           MutexUnlocker mu(MultiArray_lock);
           MutexUnlocker mc(Compile_lock);   // for vtables
           Klass* sk = element_super->array_klass(CHECK_0);
           super_klass = KlassHandle(THREAD, sk);
           for( int i = element_supers->length()-1; i >= 0; i-- ) {
             KlassHandle elem_super (THREAD, element_supers->at(i));
             elem_super->array_klass(CHECK_0);
           }
           // Now retry from the beginning
           Klass* klass_oop = element_klass->array_klass(n, CHECK_0);
           // Create a handle because the enclosing brace, when locking
           // can cause a gc.  Better to have this function return a Handle.
           ek = KlassHandle(THREAD, klass_oop);
         }  // re-lock
         return ek();
       }
     } else {
       // The element type is already Object.  Object[] has direct super of Object.
       super_klass = KlassHandle(THREAD, SystemDictionary::Object_klass());
     }
   }
   // Create type name for klass.
   Symbol* name = NULL;
   if (!element_klass->oop_is_instance() ||
       (name = InstanceKlass::cast(element_klass())->array_name()) == NULL) {
     ResourceMark rm(THREAD);
     char *name_str = element_klass->name()->as_C_string();
     int len = element_klass->name()->utf8_length();
     char *new_str = NEW_RESOURCE_ARRAY(char, len + 4);
     int idx = 0;
     new_str[idx++] = '[';
     if (element_klass->oop_is_instance()) { // it could be an array or simple type
       new_str[idx++] = 'L';
     }
     memcpy(&new_str[idx], name_str, len * sizeof(char));
     idx += len;
     if (element_klass->oop_is_instance()) {
       new_str[idx++] = ';';
     }
     new_str[idx++] = '\0';
     name = SymbolTable::new_permanent_symbol(new_str, CHECK_0);
     if (element_klass->oop_is_instance()) {
       InstanceKlass* ik = InstanceKlass::cast(element_klass());
       ik->set_array_name(name);
     }
   }
   // Initialize instance variables
   ObjArrayKlass* oak = ObjArrayKlass::allocate(loader_data, n, element_klass, name, CHECK_0);
   // Add all classes to our internal class loader list here,
   // including classes in the bootstrap (NULL) class loader.
   // GC walks these as strong roots.
   loader_data->add_class(oak);
   // Call complete_create_array_klass after all instance variables has been initialized.
   ArrayKlass::complete_create_array_klass(oak, super_klass, CHECK_0);
   return oak;
 }
 ObjArrayKlass::ObjArrayKlass(int n, KlassHandle element_klass, Symbol* name) : ArrayKlass(name) {
   this->set_dimension(n);
   this->set_element_klass(element_klass());
   // decrement refcount because object arrays are not explicitly freed.  The
   // InstanceKlass array_name() keeps the name counted while the klass is
   // loaded.
   name->decrement_refcount();
   Klass* bk;
   if (element_klass->oop_is_objArray()) {
     bk = ObjArrayKlass::cast(element_klass())->bottom_klass();
   } else {
     bk = element_klass();
   }
   assert(bk != NULL && (bk->oop_is_instance() || bk->oop_is_typeArray()), "invalid bottom klass");
   this->set_bottom_klass(bk);
   this->set_class_loader_data(bk->class_loader_data());
   this->set_layout_helper(array_layout_helper(T_OBJECT));
   assert(this->oop_is_array(), "sanity");
   assert(this->oop_is_objArray(), "sanity");
 }
 int ObjArrayKlass::oop_size(oop obj) const {
   assert(obj->is_objArray(), "must be object array");
   return objArrayOop(obj)->object_size();
 }
 objArrayOop ObjArrayKlass::allocate(int length, TRAPS) {
   if (length >= 0) {
     if (length <= arrayOopDesc::max_array_length(T_OBJECT)) {
       int size = objArrayOopDesc::object_size(length);
       KlassHandle h_k(THREAD, this);
       return (objArrayOop)CollectedHeap::array_allocate(h_k, size, length, CHECK_NULL);
     } else {
       report_java_out_of_memory("Requested array size exceeds VM limit");
       JvmtiExport::post_array_size_exhausted();
       THROW_OOP_0(Universe::out_of_memory_error_array_size());
     }
   } else {
     THROW_0(vmSymbols::java_lang_NegativeArraySizeException());
   }
 }
 static int multi_alloc_counter = 0;
 oop ObjArrayKlass::multi_allocate(int rank, jint* sizes, TRAPS) {
   int length = *sizes;
   // Call to lower_dimension uses this pointer, so most be called before a
   // possible GC
   KlassHandle h_lower_dimension(THREAD, lower_dimension());
   // If length < 0 allocate will throw an exception.
   objArrayOop array = allocate(length, CHECK_NULL);
   objArrayHandle h_array (THREAD, array);
   if (rank > 1) {
     if (length != 0) {
       for (int index = 0; index < length; index++) {
         ArrayKlass* ak = ArrayKlass::cast(h_lower_dimension());
         oop sub_array = ak->multi_allocate(rank-1, &sizes[1], CHECK_NULL);
         h_array->obj_at_put(index, sub_array);
       }
     } else {
       // Since this array dimension has zero length, nothing will be
       // allocated, however the lower dimension values must be checked
       // for illegal values.
       for (int i = 0; i < rank - 1; ++i) {
         sizes += 1;
         if (*sizes < 0) {
           THROW_0(vmSymbols::java_lang_NegativeArraySizeException());
         }
       }
     }
   }
   return h_array();
 }
 // Either oop or narrowOop depending on UseCompressedOops.
 template <class T> void ObjArrayKlass::do_copy(arrayOop s, T* src,
                                arrayOop d, T* dst, int length, TRAPS) {
   BarrierSet* bs = Universe::heap()->barrier_set();
   // For performance reasons, we assume we are that the write barrier we
   // are using has optimized modes for arrays of references.  At least one
   // of the asserts below will fail if this is not the case.
   assert(bs->has_write_ref_array_opt(), "Barrier set must have ref array opt");
   assert(bs->has_write_ref_array_pre_opt(), "For pre-barrier as well.");
   if (s == d) {
     // since source and destination are equal we do not need conversion checks.
     assert(length > 0, "sanity check");
     bs->write_ref_array_pre(dst, length);
     Copy::conjoint_oops_atomic(src, dst, length);
   } else {
     // We have to make sure all elements conform to the destination array
     Klass* bound = ObjArrayKlass::cast(d->klass())->element_klass();
     Klass* stype = ObjArrayKlass::cast(s->klass())->element_klass();
     if (stype == bound || stype->is_subtype_of(bound)) {
       // elements are guaranteed to be subtypes, so no check necessary
       bs->write_ref_array_pre(dst, length);
       Copy::conjoint_oops_atomic(src, dst, length);
     } else {
       // slow case: need individual subtype checks
       // note: don't use obj_at_put below because it includes a redundant store check
       T* from = src;
       T* end = from + length;
       for (T* p = dst; from < end; from++, p++) {
         // XXX this is going to be slow.
         T element = *from;
         // even slower now
         bool element_is_null = oopDesc::is_null(element);
         oop new_val = element_is_null ? oop(NULL)
                                       : oopDesc::decode_heap_oop_not_null(element);
         if (element_is_null ||
             (new_val->klass())->is_subtype_of(bound)) {
           bs->write_ref_field_pre(p, new_val);
           *p = *from;
         } else {
           // We must do a barrier to cover the partial copy.
           const size_t pd = pointer_delta(p, dst, (size_t)heapOopSize);
           // pointer delta is scaled to number of elements (length field in
           // objArrayOop) which we assume is 32 bit.
           assert(pd == (size_t)(int)pd, "length field overflow");
           bs->write_ref_array((HeapWord*)dst, pd);
           THROW(vmSymbols::java_lang_ArrayStoreException());
           return;
         }
       }
     }
   }
   bs->write_ref_array((HeapWord*)dst, length);
 }
 void ObjArrayKlass::copy_array(arrayOop s, int src_pos, arrayOop d,
                                int dst_pos, int length, TRAPS) {
   assert(s->is_objArray(), "must be obj array");
   if (!d->is_objArray()) {
     THROW(vmSymbols::java_lang_ArrayStoreException());
   }
   // Check is all offsets and lengths are non negative
   if (src_pos < 0 || dst_pos < 0 || length < 0) {
     THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException());
   }
   // Check if the ranges are valid
   if  ( (((unsigned int) length + (unsigned int) src_pos) > (unsigned int) s->length())
      || (((unsigned int) length + (unsigned int) dst_pos) > (unsigned int) d->length()) ) {
     THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException());
   }
   // Special case. Boundary cases must be checked first
   // This allows the following call: copy_array(s, s.length(), d.length(), 0).
   // This is correct, since the position is supposed to be an 'in between point', i.e., s.length(),
   // points to the right of the last element.
   if (length==0) {
     return;
   }
   if (UseCompressedOops) {
     narrowOop* const src = objArrayOop(s)->obj_at_addr<narrowOop>(src_pos);
     narrowOop* const dst = objArrayOop(d)->obj_at_addr<narrowOop>(dst_pos);
     do_copy<narrowOop>(s, src, d, dst, length, CHECK);
   } else {
     oop* const src = objArrayOop(s)->obj_at_addr<oop>(src_pos);
     oop* const dst = objArrayOop(d)->obj_at_addr<oop>(dst_pos);
     do_copy<oop> (s, src, d, dst, length, CHECK);
   }
 }
 Klass* ObjArrayKlass::array_klass_impl(bool or_null, int n, TRAPS) {
   assert(dimension() <= n, "check order of chain");
   int dim = dimension();
   if (dim == n) return this;
   if (higher_dimension() == NULL) {
     if (or_null)  return NULL;
     ResourceMark rm;
     JavaThread *jt = (JavaThread *)THREAD;
     {
       MutexLocker mc(Compile_lock, THREAD);   // for vtables
       // Ensure atomic creation of higher dimensions
       MutexLocker mu(MultiArray_lock, THREAD);
       // Check if another thread beat us
       if (higher_dimension() == NULL) {
         // Create multi-dim klass object and link them together
         Klass* k =
           ObjArrayKlass::allocate_objArray_klass(class_loader_data(), dim + 1, this, CHECK_NULL);
         ObjArrayKlass* ak = ObjArrayKlass::cast(k);
         ak->set_lower_dimension(this);
         OrderAccess::storestore();
         set_higher_dimension(ak);
         assert(ak->oop_is_objArray(), "incorrect initialization of ObjArrayKlass");
       }
     }
   } else {
     CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops());
   }
   ObjArrayKlass *ak = ObjArrayKlass::cast(higher_dimension());
   if (or_null) {
     return ak->array_klass_or_null(n);
   }
   return ak->array_klass(n, CHECK_NULL);
 }
 Klass* ObjArrayKlass::array_klass_impl(bool or_null, TRAPS) {
   return array_klass_impl(or_null, dimension() +  1, CHECK_NULL);
 }
 bool ObjArrayKlass::can_be_primary_super_slow() const {
   if (!bottom_klass()->can_be_primary_super())
     // array of interfaces
     return false;
   else
     return Klass::can_be_primary_super_slow();
 }
 GrowableArray<Klass*>* ObjArrayKlass::compute_secondary_supers(int num_extra_slots) {
   // interfaces = { cloneable_klass, serializable_klass, elemSuper[], ... };
   Array<Klass*>* elem_supers = element_klass()->secondary_supers();
   int num_elem_supers = elem_supers == NULL ? 0 : elem_supers->length();
   int num_secondaries = num_extra_slots + 2 + num_elem_supers;
   if (num_secondaries == 2) {
     // Must share this for correct bootstrapping!
     set_secondary_supers(Universe::the_array_interfaces_array());
     return NULL;
   } else {
     GrowableArray<Klass*>* secondaries = new GrowableArray<Klass*>(num_elem_supers+2);
     secondaries->push(SystemDictionary::Cloneable_klass());
     secondaries->push(SystemDictionary::Serializable_klass());
     for (int i = 0; i < num_elem_supers; i++) {
       Klass* elem_super = (Klass*) elem_supers->at(i);
       Klass* array_super = elem_super->array_klass_or_null();
       assert(array_super != NULL, "must already have been created");
       secondaries->push(array_super);
     }
     return secondaries;
   }
 }
 bool ObjArrayKlass::compute_is_subtype_of(Klass* k) {
   if (!k->oop_is_objArray())
     return ArrayKlass::compute_is_subtype_of(k);
   ObjArrayKlass* oak = ObjArrayKlass::cast(k);
   return element_klass()->is_subtype_of(oak->element_klass());
 }
 void ObjArrayKlass::initialize(TRAPS) {
   bottom_klass()->initialize(THREAD);  // dispatches to either InstanceKlass or TypeArrayKlass
 }
 #define ObjArrayKlass_SPECIALIZED_OOP_ITERATE(T, a, p, do_oop) \
 {                                   \
   T* p         = (T*)(a)->base();   \
   T* const end = p + (a)->length(); \
   while (p < end) {                 \
     do_oop;                         \
     p++;                            \
   }                                 \
 }
 #define ObjArrayKlass_SPECIALIZED_BOUNDED_OOP_ITERATE(T, a, p, low, high, do_oop) \
 {                                   \
   T* const l = (T*)(low);           \
   T* const h = (T*)(high);          \
   T* p       = (T*)(a)->base();     \
   T* end     = p + (a)->length();   \
   if (p < l) p = l;                 \
   if (end > h) end = h;             \
   while (p < end) {                 \
     do_oop;                         \
     ++p;                            \
   }                                 \
 }
 #define ObjArrayKlass_OOP_ITERATE(a, p, do_oop)      \
   if (UseCompressedOops) {                           \
     ObjArrayKlass_SPECIALIZED_OOP_ITERATE(narrowOop, \
       a, p, do_oop)                                  \
   } else {                                           \
     ObjArrayKlass_SPECIALIZED_OOP_ITERATE(oop,       \
       a, p, do_oop)                                  \
   }
 #define ObjArrayKlass_BOUNDED_OOP_ITERATE(a, p, low, high, do_oop) \
   if (UseCompressedOops) {                                   \
     ObjArrayKlass_SPECIALIZED_BOUNDED_OOP_ITERATE(narrowOop, \
       a, p, low, high, do_oop)                               \
   } else {                                                   \
     ObjArrayKlass_SPECIALIZED_BOUNDED_OOP_ITERATE(oop,       \
       a, p, low, high, do_oop)                               \
   }
 void ObjArrayKlass::oop_follow_contents(oop obj) {
   assert (obj->is_array(), "obj must be array");
   MarkSweep::follow_klass(obj->klass());
   if (UseCompressedOops) {
     objarray_follow_contents<narrowOop>(obj, 0);
   } else {
     objarray_follow_contents<oop>(obj, 0);
   }
 }
 #if INCLUDE_ALL_GCS
 void ObjArrayKlass::oop_follow_contents(ParCompactionManager* cm,
                                         oop obj) {
   assert(obj->is_array(), "obj must be array");
   PSParallelCompact::follow_klass(cm, obj->klass());
   if (UseCompressedOops) {
     objarray_follow_contents<narrowOop>(cm, obj, 0);
   } else {
     objarray_follow_contents<oop>(cm, obj, 0);
   }
 }
 #endif // INCLUDE_ALL_GCS
 #define if_do_metadata_checked(closure, nv_suffix)                    \
   /* Make sure the non-virtual and the virtual versions match. */     \
   assert(closure->do_metadata##nv_suffix() == closure->do_metadata(), \
       "Inconsistency in do_metadata");                                \
   if (closure->do_metadata##nv_suffix())
 #define ObjArrayKlass_OOP_OOP_ITERATE_DEFN(OopClosureType, nv_suffix)           \
                                                                                 \
 int ObjArrayKlass::oop_oop_iterate##nv_suffix(oop obj,                          \
                                               OopClosureType* closure) {        \
   SpecializationStats::record_iterate_call##nv_suffix(SpecializationStats::oa); \
   assert (obj->is_array(), "obj must be array");                                \
   objArrayOop a = objArrayOop(obj);                                             \
   /* Get size before changing pointers. */                                      \
   /* Don't call size() or oop_size() since that is a virtual call. */           \
   int size = a->object_size();                                                  \
   if_do_metadata_checked(closure, nv_suffix) {                                  \
     closure->do_klass##nv_suffix(obj->klass());                                 \
   }                                                                             \
   ObjArrayKlass_OOP_ITERATE(a, p, (closure)->do_oop##nv_suffix(p))              \
   return size;                                                                  \
 }
 #define ObjArrayKlass_OOP_OOP_ITERATE_DEFN_m(OopClosureType, nv_suffix)         \
                                                                                 \
 int ObjArrayKlass::oop_oop_iterate##nv_suffix##_m(oop obj,                      \
                                                   OopClosureType* closure,      \
                                                   MemRegion mr) {               \
   SpecializationStats::record_iterate_call##nv_suffix(SpecializationStats::oa); \
   assert(obj->is_array(), "obj must be array");                                 \
   objArrayOop a  = objArrayOop(obj);                                            \
   /* Get size before changing pointers. */                                      \
   /* Don't call size() or oop_size() since that is a virtual call */            \
   int size = a->object_size();                                                  \
   if_do_metadata_checked(closure, nv_suffix) {                                  \
     /* SSS: Do we need to pass down mr here? */                                 \
     closure->do_klass##nv_suffix(a->klass());                                   \
   }                                                                             \
   ObjArrayKlass_BOUNDED_OOP_ITERATE(                                            \
     a, p, mr.start(), mr.end(), (closure)->do_oop##nv_suffix(p))                \
   return size;                                                                  \
 }
 // Like oop_oop_iterate but only iterates over a specified range and only used
 // for objArrayOops.
 #define ObjArrayKlass_OOP_OOP_ITERATE_DEFN_r(OopClosureType, nv_suffix)         \
                                                                                 \
 int ObjArrayKlass::oop_oop_iterate_range##nv_suffix(oop obj,                    \
                                                   OopClosureType* closure,      \
                                                   int start, int end) {         \
   SpecializationStats::record_iterate_call##nv_suffix(SpecializationStats::oa); \
   assert(obj->is_array(), "obj must be array");                                 \
   objArrayOop a  = objArrayOop(obj);                                            \
   /* Get size before changing pointers. */                                      \
   /* Don't call size() or oop_size() since that is a virtual call */            \
   int size = a->object_size();                                                  \
   if (UseCompressedOops) {                                                      \
     HeapWord* low = start == 0 ? (HeapWord*)a : (HeapWord*)a->obj_at_addr<narrowOop>(start);\
     /* this might be wierd if end needs to be aligned on HeapWord boundary */   \
     HeapWord* high = (HeapWord*)((narrowOop*)a->base() + end);                  \
     MemRegion mr(low, high);                                                    \
     if_do_metadata_checked(closure, nv_suffix) {                                \
       /* SSS: Do we need to pass down mr here? */                               \
       closure->do_klass##nv_suffix(a->klass());                                 \
     }                                                                           \
     ObjArrayKlass_SPECIALIZED_BOUNDED_OOP_ITERATE(narrowOop,                    \
       a, p, low, high, (closure)->do_oop##nv_suffix(p))                         \
   } else {                                                                      \
     HeapWord* low = start == 0 ? (HeapWord*)a : (HeapWord*)a->obj_at_addr<oop>(start);  \
     HeapWord* high = (HeapWord*)((oop*)a->base() + end);                        \
     MemRegion mr(low, high);                                                    \
     if_do_metadata_checked(closure, nv_suffix) {                                \
       /* SSS: Do we need to pass down mr here? */                               \
       closure->do_klass##nv_suffix(a->klass());                                 \
     }                                                                           \
     ObjArrayKlass_SPECIALIZED_BOUNDED_OOP_ITERATE(oop,                          \
       a, p, low, high, (closure)->do_oop##nv_suffix(p))                         \
   }                                                                             \
   return size;                                                                  \
 }
 ALL_OOP_OOP_ITERATE_CLOSURES_1(ObjArrayKlass_OOP_OOP_ITERATE_DEFN)
 ALL_OOP_OOP_ITERATE_CLOSURES_2(ObjArrayKlass_OOP_OOP_ITERATE_DEFN)
 ALL_OOP_OOP_ITERATE_CLOSURES_1(ObjArrayKlass_OOP_OOP_ITERATE_DEFN_m)
 ALL_OOP_OOP_ITERATE_CLOSURES_2(ObjArrayKlass_OOP_OOP_ITERATE_DEFN_m)
 ALL_OOP_OOP_ITERATE_CLOSURES_1(ObjArrayKlass_OOP_OOP_ITERATE_DEFN_r)
 ALL_OOP_OOP_ITERATE_CLOSURES_2(ObjArrayKlass_OOP_OOP_ITERATE_DEFN_r)
 int ObjArrayKlass::oop_adjust_pointers(oop obj) {
   assert(obj->is_objArray(), "obj must be obj array");
   objArrayOop a = objArrayOop(obj);
   // Get size before changing pointers.
   // Don't call size() or oop_size() since that is a virtual call.
   int size = a->object_size();
   ObjArrayKlass_OOP_ITERATE(a, p, MarkSweep::adjust_pointer(p))
   return size;
 }
 #if INCLUDE_ALL_GCS
 void ObjArrayKlass::oop_push_contents(PSPromotionManager* pm, oop obj) {
   assert(obj->is_objArray(), "obj must be obj array");
   ObjArrayKlass_OOP_ITERATE( \
     objArrayOop(obj), p, \
     if (PSScavenge::should_scavenge(p)) { \
       pm->claim_or_forward_depth(p); \
     })
 }
 int ObjArrayKlass::oop_update_pointers(ParCompactionManager* cm, oop obj) {
   assert (obj->is_objArray(), "obj must be obj array");
   objArrayOop a = objArrayOop(obj);
   int size = a->object_size();
   ObjArrayKlass_OOP_ITERATE(a, p, PSParallelCompact::adjust_pointer(p))
   return size;
 }
 #endif // INCLUDE_ALL_GCS
 // JVM support
 jint ObjArrayKlass::compute_modifier_flags(TRAPS) const {
   // The modifier for an objectArray is the same as its element
   if (element_klass() == NULL) {
     assert(Universe::is_bootstrapping(), "partial objArray only at startup");
     return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
   }
   // Return the flags of the bottom element type.
   jint element_flags = bottom_klass()->compute_modifier_flags(CHECK_0);
   return (element_flags & (JVM_ACC_PUBLIC | JVM_ACC_PRIVATE | JVM_ACC_PROTECTED))
                         | (JVM_ACC_ABSTRACT | JVM_ACC_FINAL);
 }
 // Printing
 void ObjArrayKlass::print_on(outputStream* st) const {
 #ifndef PRODUCT
   Klass::print_on(st);
   st->print(" - instance klass: ");
   element_klass()->print_value_on(st);
   st->cr();
 #endif //PRODUCT
 }
 void ObjArrayKlass::print_value_on(outputStream* st) const {
   assert(is_klass(), "must be klass");
   element_klass()->print_value_on(st);
   st->print("[]");
 }
 #ifndef PRODUCT
 void ObjArrayKlass::oop_print_on(oop obj, outputStream* st) {
   ArrayKlass::oop_print_on(obj, st);
   assert(obj->is_objArray(), "must be objArray");
   objArrayOop oa = objArrayOop(obj);
   int print_len = MIN2((intx) oa->length(), MaxElementPrintSize);
   for(int index = 0; index < print_len; index++) {
     st->print(" - %3d : ", index);
     oa->obj_at(index)->print_value_on(st);
     st->cr();
   }
   int remaining = oa->length() - print_len;
   if (remaining > 0) {
     st->print_cr(" - <%d more elements, increase MaxElementPrintSize to print>", remaining);
   }
 }
 #endif //PRODUCT
 static int max_objArray_print_length = 4;
 void ObjArrayKlass::oop_print_value_on(oop obj, outputStream* st) {
   assert(obj->is_objArray(), "must be objArray");
   st->print("a ");
   element_klass()->print_value_on(st);
   int len = objArrayOop(obj)->length();
   st->print("[%d] ", len);
   obj->print_address_on(st);
   if (NOT_PRODUCT(PrintOopAddress ||) PrintMiscellaneous && (WizardMode || Verbose)) {
     st->print("{");
     for (int i = 0; i < len; i++) {
       if (i > max_objArray_print_length) {
         st->print("..."); break;
       }
       st->print(" "INTPTR_FORMAT, (intptr_t)(void*)objArrayOop(obj)->obj_at(i));
     }
     st->print(" }");
   }
 }
 const char* ObjArrayKlass::internal_name() const {
   return external_name();
 }
 // Verification
 void ObjArrayKlass::verify_on(outputStream* st, bool check_dictionary) {
   ArrayKlass::verify_on(st, check_dictionary);
   guarantee(element_klass()->is_klass(), "should be klass");
   guarantee(bottom_klass()->is_klass(), "should be klass");
   Klass* bk = bottom_klass();
   guarantee(bk->oop_is_instance() || bk->oop_is_typeArray(),  "invalid bottom klass");
 }
 void ObjArrayKlass::oop_verify_on(oop obj, outputStream* st) {
   ArrayKlass::oop_verify_on(obj, st);
   guarantee(obj->is_objArray(), "must be objArray");
   objArrayOop oa = objArrayOop(obj);
   for(int index = 0; index < oa->length(); index++) {
     guarantee(oa->obj_at(index)->is_oop_or_null(), "should be oop");
   }
 }

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/oops/objArrayKlass.cpp@ad72068ac41e (annotated)

src/share/vm/oops/objArrayKlass.cpp