view src/share/vm/memory/oopFactory.cpp @ 452:00b023ae2d78

6722113: CMS: Incorrect overflow handling during precleaning of Reference lists Summary: When we encounter marking stack overflow during precleaning of Reference lists, we were using the overflow list mechanism, which can cause problems on account of mutating the mark word of the header because of conflicts with mutator accesses and updates of that field. Instead we should use the usual mechanism for overflow handling in concurrent phases, namely dirtying of the card on which the overflowed object lies. Since precleaning effectively does a form of discovered list processing, albeit with discovery enabled, we needed to adjust some code to be correct in the face of interleaved processing and discovery. Reviewed-by: apetrusenko, jcoomes
author ysr
date Thu, 20 Nov 2008 12:27:41 -0800
parents a61af66fc99e
children 0af8b0718fc9
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/*
 * Copyright 1997-2007 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
 * CA 95054 USA or visit www.sun.com if you need additional information or
 * have any questions.
 *
 */

# include "incls/_precompiled.incl"
# include "incls/_oopFactory.cpp.incl"


typeArrayOop oopFactory::new_charArray(const char* utf8_str, TRAPS) {
  int length = utf8_str == NULL ? 0 : UTF8::unicode_length(utf8_str);
  typeArrayOop result = new_charArray(length, CHECK_NULL);
  if (length > 0) {
    UTF8::convert_to_unicode(utf8_str, result->char_at_addr(0), length);
  }
  return result;
}

typeArrayOop oopFactory::new_permanent_charArray(int length, TRAPS) {
  return typeArrayKlass::cast(Universe::charArrayKlassObj())->allocate_permanent(length, THREAD);
}

typeArrayOop oopFactory::new_permanent_byteArray(int length, TRAPS) {
  return typeArrayKlass::cast(Universe::byteArrayKlassObj())->allocate_permanent(length, THREAD);
}


typeArrayOop oopFactory::new_permanent_shortArray(int length, TRAPS) {
  return typeArrayKlass::cast(Universe::shortArrayKlassObj())->allocate_permanent(length, THREAD);
}


typeArrayOop oopFactory::new_permanent_intArray(int length, TRAPS) {
  return typeArrayKlass::cast(Universe::intArrayKlassObj())->allocate_permanent(length, THREAD);
}


typeArrayOop oopFactory::new_typeArray(BasicType type, int length, TRAPS) {
  klassOop type_asKlassOop = Universe::typeArrayKlassObj(type);
  typeArrayKlass* type_asArrayKlass = typeArrayKlass::cast(type_asKlassOop);
  typeArrayOop result = type_asArrayKlass->allocate(length, THREAD);
  return result;
}


objArrayOop oopFactory::new_objArray(klassOop klass, int length, TRAPS) {
  assert(klass->is_klass(), "must be instance class");
  if (klass->klass_part()->oop_is_array()) {
    return ((arrayKlass*)klass->klass_part())->allocate_arrayArray(1, length, THREAD);
  } else {
    assert (klass->klass_part()->oop_is_instance(), "new object array with klass not an instanceKlass");
    return ((instanceKlass*)klass->klass_part())->allocate_objArray(1, length, THREAD);
  }
}

objArrayOop oopFactory::new_system_objArray(int length, TRAPS) {
  int size = objArrayOopDesc::object_size(length);
  KlassHandle klass (THREAD, Universe::systemObjArrayKlassObj());
  objArrayOop o = (objArrayOop)
    Universe::heap()->permanent_array_allocate(klass, size, length, CHECK_NULL);
  // initialization not needed, allocated cleared
  return o;
}


constantPoolOop oopFactory::new_constantPool(int length, TRAPS) {
  constantPoolKlass* ck = constantPoolKlass::cast(Universe::constantPoolKlassObj());
  return ck->allocate(length, CHECK_NULL);
}


constantPoolCacheOop oopFactory::new_constantPoolCache(int length, TRAPS) {
  constantPoolCacheKlass* ck = constantPoolCacheKlass::cast(Universe::constantPoolCacheKlassObj());
  return ck->allocate(length, CHECK_NULL);
}


klassOop oopFactory::new_instanceKlass(int vtable_len, int itable_len, int static_field_size,
                                       int nonstatic_oop_map_size, ReferenceType rt, TRAPS) {
  instanceKlassKlass* ikk = instanceKlassKlass::cast(Universe::instanceKlassKlassObj());
  return ikk->allocate_instance_klass(vtable_len, itable_len, static_field_size, nonstatic_oop_map_size, rt, CHECK_NULL);
}


constMethodOop oopFactory::new_constMethod(int byte_code_size,
                                           int compressed_line_number_size,
                                           int localvariable_table_length,
                                           int checked_exceptions_length,
                                           TRAPS) {
  klassOop cmkObj = Universe::constMethodKlassObj();
  constMethodKlass* cmk = constMethodKlass::cast(cmkObj);
  return cmk->allocate(byte_code_size, compressed_line_number_size,
                       localvariable_table_length, checked_exceptions_length,
                       CHECK_NULL);
}


methodOop oopFactory::new_method(int byte_code_size, AccessFlags access_flags,
                                 int compressed_line_number_size,
                                 int localvariable_table_length,
                                 int checked_exceptions_length, TRAPS) {
  methodKlass* mk = methodKlass::cast(Universe::methodKlassObj());
  assert(!access_flags.is_native() || byte_code_size == 0,
         "native methods should not contain byte codes");
  constMethodOop cm = new_constMethod(byte_code_size,
                                      compressed_line_number_size,
                                      localvariable_table_length,
                                      checked_exceptions_length, CHECK_NULL);
  constMethodHandle rw(THREAD, cm);
  return mk->allocate(rw, access_flags, CHECK_NULL);
}


methodDataOop oopFactory::new_methodData(methodHandle method, TRAPS) {
  methodDataKlass* mdk = methodDataKlass::cast(Universe::methodDataKlassObj());
  return mdk->allocate(method, CHECK_NULL);
}


compiledICHolderOop oopFactory::new_compiledICHolder(methodHandle method, KlassHandle klass, TRAPS) {
  compiledICHolderKlass* ck = (compiledICHolderKlass*) Universe::compiledICHolderKlassObj()->klass_part();
  compiledICHolderOop c = ck->allocate(CHECK_NULL);
  c->set_holder_method(method());
  c->set_holder_klass(klass());
  return c;
}