jdk8-mips64-public/hotspot: src/share/vm/oops/objArrayKlassKlass.cpp@8012aa3ccede (annotated)

src/share/vm/oops/objArrayKlassKlass.cpp@8012aa3ccede (annotated)

src/share/vm/oops/objArrayKlassKlass.cpp

Thu, 13 Jan 2011 22:15:41 -0800

author: never
date: Thu, 13 Jan 2011 22:15:41 -0800
changeset 2462: 8012aa3ccede
parent 2314: f95d63e2154a
child 2497: 3582bf76420e
permissions: -rw-r--r--

4926272: methodOopDesc::method_from_bcp is unsafe
Reviewed-by: coleenp, jrose, kvn, dcubed

 /*
  * Copyright (c) 1997, 2010, 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 "oops/instanceKlass.hpp"
 #include "oops/objArrayKlassKlass.hpp"
 #include "oops/oop.inline.hpp"
 #include "oops/oop.inline2.hpp"
 klassOop objArrayKlassKlass::create_klass(TRAPS) {
   objArrayKlassKlass o;
   KlassHandle h_this_klass(THREAD, Universe::klassKlassObj());
   KlassHandle k = base_create_klass(h_this_klass, header_size(), o.vtbl_value(), CHECK_0);
   assert(k()->size() == align_object_size(header_size()), "wrong size for object");
   java_lang_Class::create_mirror(k, CHECK_0); // Allocate mirror
   return k();
 }
 klassOop objArrayKlassKlass::allocate_system_objArray_klass(TRAPS) {
   // system_objArrays have no instance klass, so allocate with fake class, then reset to NULL
   KlassHandle kk(THREAD, Universe::intArrayKlassObj());
   klassOop k = allocate_objArray_klass(1, kk, CHECK_0);
   objArrayKlass* tk = (objArrayKlass*) k->klass_part();
   tk->set_element_klass(NULL);
   tk->set_bottom_klass(NULL);
   return k;
 }
 klassOop objArrayKlassKlass::allocate_objArray_klass(int n, KlassHandle element_klass, TRAPS) {
   objArrayKlassKlassHandle this_oop(THREAD, as_klassOop());
   return allocate_objArray_klass_impl(this_oop, n, element_klass, THREAD);
 }
 klassOop objArrayKlassKlass::allocate_objArray_klass_impl(objArrayKlassKlassHandle this_oop,
                                                           int n, KlassHandle element_klass, TRAPS) {
   // Eagerly allocate the direct array supertype.
   KlassHandle super_klass = KlassHandle();
   if (!Universe::is_bootstrapping()) {
     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.
       objArrayHandle element_supers = objArrayHandle(THREAD,
                                             element_klass->secondary_supers());
       for( int i = element_supers->length()-1; i >= 0; i-- ) {
         klassOop elem_super = (klassOop) element_supers->obj_at(i);
         if (Klass::cast(elem_super)->array_klass_or_null() == NULL) {
           supers_exist = false;
           break;
         }
       }
       if (!supers_exist) {
         // Oops.  Not allocated yet.  Back out, allocate it, and retry.
 #ifndef PRODUCT
         if (WizardMode) {
           tty->print_cr("Must retry array klass creation for depth %d",n);
         }
 #endif
         KlassHandle ek;
         {
           MutexUnlocker mu(MultiArray_lock);
           MutexUnlocker mc(Compile_lock);   // for vtables
           klassOop 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->obj_at(i));
             elem_super->array_klass(CHECK_0);
           }
           // Now retry from the beginning
           klassOop 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 (except for symbol arrays, since symbolKlass
   // does not have a name).  This will potentially allocate an object, cause
   // GC, and all other kinds of things.  Hence, this must be done before we
   // get a handle to the new objArrayKlass we want to construct.  We cannot
   // block while holding a handling to a partly initialized object.
   symbolHandle name = symbolHandle();
   if (!element_klass->oop_is_symbol()) {
     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 = oopFactory::new_symbol_handle(new_str, CHECK_0);
   }
   objArrayKlass o;
   arrayKlassHandle k = arrayKlass::base_create_array_klass(o.vtbl_value(),
                                                            objArrayKlass::header_size(),
                                                           this_oop,
                                                            CHECK_0);
   // Initialize instance variables
   objArrayKlass* oak = objArrayKlass::cast(k());
   oak->set_dimension(n);
   oak->set_element_klass(element_klass());
   oak->set_name(name());
   klassOop bk;
   if (element_klass->oop_is_objArray()) {
     bk = objArrayKlass::cast(element_klass())->bottom_klass();
   } else {
     bk = element_klass();
   }
   assert(bk != NULL && (Klass::cast(bk)->oop_is_instance() || Klass::cast(bk)->oop_is_typeArray()), "invalid bottom klass");
   oak->set_bottom_klass(bk);
   oak->set_layout_helper(array_layout_helper(T_OBJECT));
   assert(oak->oop_is_javaArray(), "sanity");
   assert(oak->oop_is_objArray(), "sanity");
   // Call complete_create_array_klass after all instance variables has been initialized.
   arrayKlass::complete_create_array_klass(k, super_klass, CHECK_0);
   return k();
 }
 void objArrayKlassKlass::oop_follow_contents(oop obj) {
   assert(obj->is_klass(), "must be klass");
   assert(klassOop(obj)->klass_part()->oop_is_objArray_slow(), "must be obj array");
   objArrayKlass* oak = objArrayKlass::cast((klassOop)obj);
   MarkSweep::mark_and_push(oak->element_klass_addr());
   MarkSweep::mark_and_push(oak->bottom_klass_addr());
   arrayKlassKlass::oop_follow_contents(obj);
 }
 #ifndef SERIALGC
 void objArrayKlassKlass::oop_follow_contents(ParCompactionManager* cm,
                                              oop obj) {
   assert(obj->is_klass(), "must be klass");
   assert(klassOop(obj)->klass_part()->oop_is_objArray_slow(), "must be obj array");
   objArrayKlass* oak = objArrayKlass::cast((klassOop)obj);
   PSParallelCompact::mark_and_push(cm, oak->element_klass_addr());
   PSParallelCompact::mark_and_push(cm, oak->bottom_klass_addr());
   arrayKlassKlass::oop_follow_contents(cm, obj);
 }
 #endif // SERIALGC
 int objArrayKlassKlass::oop_adjust_pointers(oop obj) {
   assert(obj->is_klass(), "must be klass");
   assert(klassOop(obj)->klass_part()->oop_is_objArray_slow(), "must be obj array");
   objArrayKlass* oak = objArrayKlass::cast((klassOop)obj);
   MarkSweep::adjust_pointer(oak->element_klass_addr());
   MarkSweep::adjust_pointer(oak->bottom_klass_addr());
   return arrayKlassKlass::oop_adjust_pointers(obj);
 }
 int objArrayKlassKlass::oop_oop_iterate(oop obj, OopClosure* blk) {
   assert(obj->is_klass(), "must be klass");
   assert(klassOop(obj)->klass_part()->oop_is_objArray_slow(), "must be obj array");
   objArrayKlass* oak = objArrayKlass::cast((klassOop)obj);
   blk->do_oop(oak->element_klass_addr());
   blk->do_oop(oak->bottom_klass_addr());
   return arrayKlassKlass::oop_oop_iterate(obj, blk);
 }
 int
 objArrayKlassKlass::oop_oop_iterate_m(oop obj, OopClosure* blk, MemRegion mr) {
   assert(obj->is_klass(), "must be klass");
   assert(klassOop(obj)->klass_part()->oop_is_objArray_slow(), "must be obj array");
   objArrayKlass* oak = objArrayKlass::cast((klassOop)obj);
   oop* addr;
   addr = oak->element_klass_addr();
   if (mr.contains(addr)) blk->do_oop(addr);
   addr = oak->bottom_klass_addr();
   if (mr.contains(addr)) blk->do_oop(addr);
   return arrayKlassKlass::oop_oop_iterate(obj, blk);
 }
 #ifndef SERIALGC
 void objArrayKlassKlass::oop_push_contents(PSPromotionManager* pm, oop obj) {
   assert(obj->blueprint()->oop_is_objArrayKlass(),"must be an obj array klass");
 }
 int objArrayKlassKlass::oop_update_pointers(ParCompactionManager* cm, oop obj) {
   assert(obj->is_klass(), "must be klass");
   assert(klassOop(obj)->klass_part()->oop_is_objArray_slow(), "must be obj array");
   objArrayKlass* oak = objArrayKlass::cast((klassOop)obj);
   PSParallelCompact::adjust_pointer(oak->element_klass_addr());
   PSParallelCompact::adjust_pointer(oak->bottom_klass_addr());
   return arrayKlassKlass::oop_update_pointers(cm, obj);
 }
 int objArrayKlassKlass::oop_update_pointers(ParCompactionManager* cm, oop obj,
                                             HeapWord* beg_addr,
                                             HeapWord* end_addr) {
   assert(obj->is_klass(), "must be klass");
   assert(klassOop(obj)->klass_part()->oop_is_objArray_slow(), "must be obj array");
   oop* p;
   objArrayKlass* oak = objArrayKlass::cast((klassOop)obj);
   p = oak->element_klass_addr();
   PSParallelCompact::adjust_pointer(p, beg_addr, end_addr);
   p = oak->bottom_klass_addr();
   PSParallelCompact::adjust_pointer(p, beg_addr, end_addr);
   return arrayKlassKlass::oop_update_pointers(cm, obj, beg_addr, end_addr);
 }
 #endif // SERIALGC
 #ifndef PRODUCT
 // Printing
 void objArrayKlassKlass::oop_print_on(oop obj, outputStream* st) {
   assert(obj->is_klass(), "must be klass");
   objArrayKlass* oak = (objArrayKlass*) klassOop(obj)->klass_part();
   klassKlass::oop_print_on(obj, st);
   st->print(" - instance klass: ");
   oak->element_klass()->print_value_on(st);
   st->cr();
 }
 #endif //PRODUCT
 void objArrayKlassKlass::oop_print_value_on(oop obj, outputStream* st) {
   assert(obj->is_klass(), "must be klass");
   objArrayKlass* oak = (objArrayKlass*) klassOop(obj)->klass_part();
   oak->element_klass()->print_value_on(st);
   st->print("[]");
 }
 const char* objArrayKlassKlass::internal_name() const {
   return "{object array class}";
 }
 // Verification
 void objArrayKlassKlass::oop_verify_on(oop obj, outputStream* st) {
   klassKlass::oop_verify_on(obj, st);
   objArrayKlass* oak = objArrayKlass::cast((klassOop)obj);
   guarantee(oak->element_klass()->is_perm(),  "should be in permspace");
   guarantee(oak->element_klass()->is_klass(), "should be klass");
   guarantee(oak->bottom_klass()->is_perm(),   "should be in permspace");
   guarantee(oak->bottom_klass()->is_klass(),  "should be klass");
   Klass* bk = Klass::cast(oak->bottom_klass());
   guarantee(bk->oop_is_instance() || bk->oop_is_typeArray(),  "invalid bottom klass");
 }

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/oops/objArrayKlassKlass.cpp@8012aa3ccede (annotated)

src/share/vm/oops/objArrayKlassKlass.cpp