hotspot/src/share/vm/oops/klass.cpp

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rev 611 : Merge
   1 #ifdef USE_PRAGMA_IDENT_SRC
   2 #pragma ident "@(#)klass.cpp    1.119 07/05/05 17:06:00 JVM"
   3 #endif
   4 /*
   5  * Copyright 1997-2007 Sun Microsystems, Inc.  All Rights Reserved.
   6  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   7  *
   8  * This code is free software; you can redistribute it and/or modify it
   9  * under the terms of the GNU General Public License version 2 only, as
  10  * published by the Free Software Foundation.
  11  *
  12  * This code is distributed in the hope that it will be useful, but WITHOUT
  13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  15  * version 2 for more details (a copy is included in the LICENSE file that
  16  * accompanied this code).
  17  *
  18  * You should have received a copy of the GNU General Public License version
  19  * 2 along with this work; if not, write to the Free Software Foundation,
  20  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  21  *
  22  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  23  * CA 95054 USA or visit www.sun.com if you need additional information or
  24  * have any questions.
  25  *  


 168   CollectedHeap::post_allocation_install_obj_klass(klass, new_klass, size);
 169 }
 170 
 171 void* Klass_vtbl::operator new(size_t ignored, KlassHandle& klass,
 172                                int size, TRAPS) {
 173   // The vtable pointer is installed during the execution of 
 174   // constructors in the call to permanent_obj_allocate().  Delay
 175   // the installation of the klass pointer into the new klass "k"
 176   // until after the vtable pointer has been installed (i.e., until
 177   // after the return of permanent_obj_allocate().
 178   klassOop k = 
 179     (klassOop) CollectedHeap::permanent_obj_allocate_no_klass_install(klass,
 180       size, CHECK_NULL);
 181   return k->klass_part();
 182 }
 183 
 184 jint Klass::array_layout_helper(BasicType etype) {
 185   assert(etype >= T_BOOLEAN && etype <= T_OBJECT, "valid etype");
 186   // Note that T_ARRAY is not allowed here.
 187   int  hsize = arrayOopDesc::base_offset_in_bytes(etype);
 188   int  esize = type2aelembytes[etype];
 189   bool isobj = (etype == T_OBJECT);
 190   int  tag   =  isobj ? _lh_array_tag_obj_value : _lh_array_tag_type_value;
 191   int lh = array_layout_helper(tag, hsize, etype, exact_log2(esize));
 192 
 193   assert(lh < (int)_lh_neutral_value, "must look like an array layout");
 194   assert(layout_helper_is_javaArray(lh), "correct kind");
 195   assert(layout_helper_is_objArray(lh) == isobj, "correct kind");
 196   assert(layout_helper_is_typeArray(lh) == !isobj, "correct kind");
 197   assert(layout_helper_header_size(lh) == hsize, "correct decode");
 198   assert(layout_helper_element_type(lh) == etype, "correct decode");
 199   assert(1 << layout_helper_log2_element_size(lh) == esize, "correct decode");
 200 
 201   return lh;
 202 }
 203 
 204 bool Klass::can_be_primary_super_slow() const {
 205   if (super() == NULL)
 206     return true;
 207   else if (super()->klass_part()->super_depth() >= primary_super_limit()-1)
 208     return false;


 464 
 465 
 466 klassOop Klass::array_klass_impl(bool or_null, int rank, TRAPS) {
 467   fatal("array_klass should be dispatched to instanceKlass, objArrayKlass or typeArrayKlass");
 468   return NULL;
 469 }
 470 
 471 
 472 klassOop Klass::array_klass_impl(bool or_null, TRAPS) {
 473   fatal("array_klass should be dispatched to instanceKlass, objArrayKlass or typeArrayKlass");
 474   return NULL;
 475 }
 476 
 477 
 478 void Klass::with_array_klasses_do(void f(klassOop k)) {
 479   f(as_klassOop());
 480 }
 481 
 482 
 483 const char* Klass::external_name() const {


















 484   return name()->as_klass_external_name();
 485 }
 486 
 487 
 488 char* Klass::signature_name() const {
 489   return name()->as_C_string();
 490 }
 491 
 492 // Unless overridden, modifier_flags is 0.
 493 jint Klass::compute_modifier_flags(TRAPS) const {
 494   return 0;
 495 }
 496 
 497 int Klass::atomic_incr_biased_lock_revocation_count() {
 498   return (int) Atomic::add(1, &_biased_lock_revocation_count);
 499 }
 500 
 501 // Unless overridden, jvmti_class_status has no flags set.
 502 jint Klass::jvmti_class_status() const {
 503   return 0;


 528 void Klass::oop_print_value_on(oop obj, outputStream* st) {
 529   // print title
 530   ResourceMark rm;              // Cannot print in debug mode without this
 531   st->print("%s", internal_name());
 532   obj->print_address_on(st);
 533 }
 534 
 535 #endif
 536 
 537 // Verification
 538 
 539 void Klass::oop_verify_on(oop obj, outputStream* st) {
 540   guarantee(obj->is_oop(),  "should be oop");  
 541   guarantee(obj->klass()->is_perm(),  "should be in permspace");
 542   guarantee(obj->klass()->is_klass(), "klass field is not a klass");
 543 }
 544 
 545 
 546 void Klass::oop_verify_old_oop(oop obj, oop* p, bool allow_dirty) {
 547   /* $$$ I think this functionality should be handled by verification of
 548 
 549   RememberedSet::verify_old_oop(obj, p, allow_dirty, false);
 550 
 551   the card table. */
 552 }

 553 
 554 #ifndef PRODUCT
 555 
 556 void Klass::verify_vtable_index(int i) {
 557   assert(oop_is_instance() || oop_is_array(), "only instanceKlass and arrayKlass have vtables");
 558   if (oop_is_instance()) {
 559     assert(i>=0 && i<((instanceKlass*)this)->vtable_length()/vtableEntry::size(), "index out of bounds");
 560   } else {
 561     assert(i>=0 && i<((arrayKlass*)this)->vtable_length()/vtableEntry::size(), "index out of bounds");
 562   }
 563 }
 564 
 565 #endif
   1 #ifdef USE_PRAGMA_IDENT_SRC
   2 #pragma ident "@(#)klass.cpp    1.119 07/05/05 17:06:00 JVM"
   3 #endif
   4 /*
   5  * Copyright 1997-2008 Sun Microsystems, Inc.  All Rights Reserved.
   6  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   7  *
   8  * This code is free software; you can redistribute it and/or modify it
   9  * under the terms of the GNU General Public License version 2 only, as
  10  * published by the Free Software Foundation.
  11  *
  12  * This code is distributed in the hope that it will be useful, but WITHOUT
  13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  15  * version 2 for more details (a copy is included in the LICENSE file that
  16  * accompanied this code).
  17  *
  18  * You should have received a copy of the GNU General Public License version
  19  * 2 along with this work; if not, write to the Free Software Foundation,
  20  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  21  *
  22  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  23  * CA 95054 USA or visit www.sun.com if you need additional information or
  24  * have any questions.
  25  *  


 168   CollectedHeap::post_allocation_install_obj_klass(klass, new_klass, size);
 169 }
 170 
 171 void* Klass_vtbl::operator new(size_t ignored, KlassHandle& klass,
 172                                int size, TRAPS) {
 173   // The vtable pointer is installed during the execution of 
 174   // constructors in the call to permanent_obj_allocate().  Delay
 175   // the installation of the klass pointer into the new klass "k"
 176   // until after the vtable pointer has been installed (i.e., until
 177   // after the return of permanent_obj_allocate().
 178   klassOop k = 
 179     (klassOop) CollectedHeap::permanent_obj_allocate_no_klass_install(klass,
 180       size, CHECK_NULL);
 181   return k->klass_part();
 182 }
 183 
 184 jint Klass::array_layout_helper(BasicType etype) {
 185   assert(etype >= T_BOOLEAN && etype <= T_OBJECT, "valid etype");
 186   // Note that T_ARRAY is not allowed here.
 187   int  hsize = arrayOopDesc::base_offset_in_bytes(etype);
 188   int  esize = type2aelembytes(etype);
 189   bool isobj = (etype == T_OBJECT);
 190   int  tag   =  isobj ? _lh_array_tag_obj_value : _lh_array_tag_type_value;
 191   int lh = array_layout_helper(tag, hsize, etype, exact_log2(esize));
 192 
 193   assert(lh < (int)_lh_neutral_value, "must look like an array layout");
 194   assert(layout_helper_is_javaArray(lh), "correct kind");
 195   assert(layout_helper_is_objArray(lh) == isobj, "correct kind");
 196   assert(layout_helper_is_typeArray(lh) == !isobj, "correct kind");
 197   assert(layout_helper_header_size(lh) == hsize, "correct decode");
 198   assert(layout_helper_element_type(lh) == etype, "correct decode");
 199   assert(1 << layout_helper_log2_element_size(lh) == esize, "correct decode");
 200 
 201   return lh;
 202 }
 203 
 204 bool Klass::can_be_primary_super_slow() const {
 205   if (super() == NULL)
 206     return true;
 207   else if (super()->klass_part()->super_depth() >= primary_super_limit()-1)
 208     return false;


 464 
 465 
 466 klassOop Klass::array_klass_impl(bool or_null, int rank, TRAPS) {
 467   fatal("array_klass should be dispatched to instanceKlass, objArrayKlass or typeArrayKlass");
 468   return NULL;
 469 }
 470 
 471 
 472 klassOop Klass::array_klass_impl(bool or_null, TRAPS) {
 473   fatal("array_klass should be dispatched to instanceKlass, objArrayKlass or typeArrayKlass");
 474   return NULL;
 475 }
 476 
 477 
 478 void Klass::with_array_klasses_do(void f(klassOop k)) {
 479   f(as_klassOop());
 480 }
 481 
 482 
 483 const char* Klass::external_name() const {
 484   if (oop_is_instance()) {
 485     instanceKlass* ik = (instanceKlass*) this;
 486     if (ik->is_anonymous()) {
 487       assert(AnonymousClasses, "");
 488       intptr_t hash = ik->java_mirror()->identity_hash();
 489       char     hash_buf[40];
 490       sprintf(hash_buf, "/" UINTX_FORMAT, (uintx)hash);
 491       size_t   hash_len = strlen(hash_buf);
 492 
 493       size_t result_len = name()->utf8_length();
 494       char*  result     = NEW_RESOURCE_ARRAY(char, result_len + hash_len + 1);
 495       name()->as_klass_external_name(result, (int) result_len + 1);
 496       assert(strlen(result) == result_len, "");
 497       strcpy(result + result_len, hash_buf);
 498       assert(strlen(result) == result_len + hash_len, "");
 499       return result;
 500     }
 501   }
 502   return name()->as_klass_external_name();
 503 }
 504 
 505 
 506 char* Klass::signature_name() const {
 507   return name()->as_C_string();
 508 }
 509 
 510 // Unless overridden, modifier_flags is 0.
 511 jint Klass::compute_modifier_flags(TRAPS) const {
 512   return 0;
 513 }
 514 
 515 int Klass::atomic_incr_biased_lock_revocation_count() {
 516   return (int) Atomic::add(1, &_biased_lock_revocation_count);
 517 }
 518 
 519 // Unless overridden, jvmti_class_status has no flags set.
 520 jint Klass::jvmti_class_status() const {
 521   return 0;


 546 void Klass::oop_print_value_on(oop obj, outputStream* st) {
 547   // print title
 548   ResourceMark rm;              // Cannot print in debug mode without this
 549   st->print("%s", internal_name());
 550   obj->print_address_on(st);
 551 }
 552 
 553 #endif
 554 
 555 // Verification
 556 
 557 void Klass::oop_verify_on(oop obj, outputStream* st) {
 558   guarantee(obj->is_oop(),  "should be oop");  
 559   guarantee(obj->klass()->is_perm(),  "should be in permspace");
 560   guarantee(obj->klass()->is_klass(), "klass field is not a klass");
 561 }
 562 
 563 
 564 void Klass::oop_verify_old_oop(oop obj, oop* p, bool allow_dirty) {
 565   /* $$$ I think this functionality should be handled by verification of

 566   RememberedSet::verify_old_oop(obj, p, allow_dirty, false);

 567   the card table. */
 568 }
 569 void Klass::oop_verify_old_oop(oop obj, narrowOop* p, bool allow_dirty) { }
 570 
 571 #ifndef PRODUCT
 572 
 573 void Klass::verify_vtable_index(int i) {
 574   assert(oop_is_instance() || oop_is_array(), "only instanceKlass and arrayKlass have vtables");
 575   if (oop_is_instance()) {
 576     assert(i>=0 && i<((instanceKlass*)this)->vtable_length()/vtableEntry::size(), "index out of bounds");
 577   } else {
 578     assert(i>=0 && i<((arrayKlass*)this)->vtable_length()/vtableEntry::size(), "index out of bounds");
 579   }
 580 }
 581 
 582 #endif