src/share/vm/memory/oopFactory.cpp

Mon, 26 Sep 2011 10:24:05 -0700

author
kvn
date
Mon, 26 Sep 2011 10:24:05 -0700
changeset 3157
a92cdbac8b9e
parent 2658
c7f3d0b4570f
child 3701
49036505ab5f
permissions
-rw-r--r--

7081933: Use zeroing elimination optimization for large array
Summary: Don't zero new typeArray during runtime call if the allocation is followed by arraycopy into it.
Reviewed-by: twisti

     1 /*
     2  * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved.
     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
     4  *
     5  * This code is free software; you can redistribute it and/or modify it
     6  * under the terms of the GNU General Public License version 2 only, as
     7  * published by the Free Software Foundation.
     8  *
     9  * This code is distributed in the hope that it will be useful, but WITHOUT
    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
    12  * version 2 for more details (a copy is included in the LICENSE file that
    13  * accompanied this code).
    14  *
    15  * You should have received a copy of the GNU General Public License version
    16  * 2 along with this work; if not, write to the Free Software Foundation,
    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
    18  *
    19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
    20  * or visit www.oracle.com if you need additional information or have any
    21  * questions.
    22  *
    23  */
    25 #include "precompiled.hpp"
    26 #include "classfile/javaClasses.hpp"
    27 #include "classfile/symbolTable.hpp"
    28 #include "classfile/systemDictionary.hpp"
    29 #include "classfile/vmSymbols.hpp"
    30 #include "gc_interface/collectedHeap.inline.hpp"
    31 #include "memory/oopFactory.hpp"
    32 #include "memory/resourceArea.hpp"
    33 #include "memory/universe.inline.hpp"
    34 #include "oops/compiledICHolderKlass.hpp"
    35 #include "oops/constMethodKlass.hpp"
    36 #include "oops/constantPoolKlass.hpp"
    37 #include "oops/cpCacheKlass.hpp"
    38 #include "oops/instanceKlass.hpp"
    39 #include "oops/instanceKlassKlass.hpp"
    40 #include "oops/instanceOop.hpp"
    41 #include "oops/klassKlass.hpp"
    42 #include "oops/klassOop.hpp"
    43 #include "oops/methodDataKlass.hpp"
    44 #include "oops/methodKlass.hpp"
    45 #include "oops/objArrayOop.hpp"
    46 #include "oops/oop.inline.hpp"
    49 typeArrayOop oopFactory::new_charArray(const char* utf8_str, TRAPS) {
    50   int length = utf8_str == NULL ? 0 : UTF8::unicode_length(utf8_str);
    51   typeArrayOop result = new_charArray(length, CHECK_NULL);
    52   if (length > 0) {
    53     UTF8::convert_to_unicode(utf8_str, result->char_at_addr(0), length);
    54   }
    55   return result;
    56 }
    58 typeArrayOop oopFactory::new_permanent_charArray(int length, TRAPS) {
    59   return typeArrayKlass::cast(Universe::charArrayKlassObj())->allocate_permanent(length, THREAD);
    60 }
    62 typeArrayOop oopFactory::new_permanent_byteArray(int length, TRAPS) {
    63   return typeArrayKlass::cast(Universe::byteArrayKlassObj())->allocate_permanent(length, THREAD);
    64 }
    67 typeArrayOop oopFactory::new_permanent_shortArray(int length, TRAPS) {
    68   return typeArrayKlass::cast(Universe::shortArrayKlassObj())->allocate_permanent(length, THREAD);
    69 }
    72 typeArrayOop oopFactory::new_permanent_intArray(int length, TRAPS) {
    73   return typeArrayKlass::cast(Universe::intArrayKlassObj())->allocate_permanent(length, THREAD);
    74 }
    77 typeArrayOop oopFactory::new_typeArray(BasicType type, int length, TRAPS) {
    78   klassOop type_asKlassOop = Universe::typeArrayKlassObj(type);
    79   typeArrayKlass* type_asArrayKlass = typeArrayKlass::cast(type_asKlassOop);
    80   typeArrayOop result = type_asArrayKlass->allocate_common(length, true, THREAD);
    81   return result;
    82 }
    84 typeArrayOop oopFactory::new_typeArray_nozero(BasicType type, int length, TRAPS) {
    85   klassOop type_asKlassOop = Universe::typeArrayKlassObj(type);
    86   typeArrayKlass* type_asArrayKlass = typeArrayKlass::cast(type_asKlassOop);
    87   typeArrayOop result = type_asArrayKlass->allocate_common(length, false, THREAD);
    88   return result;
    89 }
    92 objArrayOop oopFactory::new_objArray(klassOop klass, int length, TRAPS) {
    93   assert(klass->is_klass(), "must be instance class");
    94   if (klass->klass_part()->oop_is_array()) {
    95     return ((arrayKlass*)klass->klass_part())->allocate_arrayArray(1, length, THREAD);
    96   } else {
    97     assert (klass->klass_part()->oop_is_instance(), "new object array with klass not an instanceKlass");
    98     return ((instanceKlass*)klass->klass_part())->allocate_objArray(1, length, THREAD);
    99   }
   100 }
   102 objArrayOop oopFactory::new_system_objArray(int length, TRAPS) {
   103   int size = objArrayOopDesc::object_size(length);
   104   KlassHandle klass (THREAD, Universe::systemObjArrayKlassObj());
   105   objArrayOop o = (objArrayOop)
   106     Universe::heap()->permanent_array_allocate(klass, size, length, CHECK_NULL);
   107   // initialization not needed, allocated cleared
   108   return o;
   109 }
   112 constantPoolOop oopFactory::new_constantPool(int length,
   113                                              bool is_conc_safe,
   114                                              TRAPS) {
   115   constantPoolKlass* ck = constantPoolKlass::cast(Universe::constantPoolKlassObj());
   116   return ck->allocate(length, is_conc_safe, CHECK_NULL);
   117 }
   120 constantPoolCacheOop oopFactory::new_constantPoolCache(int length,
   121                                                        TRAPS) {
   122   constantPoolCacheKlass* ck = constantPoolCacheKlass::cast(Universe::constantPoolCacheKlassObj());
   123   return ck->allocate(length, CHECK_NULL);
   124 }
   127 klassOop oopFactory::new_instanceKlass(Symbol* name, int vtable_len, int itable_len,
   128                                        int static_field_size,
   129                                        unsigned int nonstatic_oop_map_count,
   130                                        ReferenceType rt, TRAPS) {
   131   instanceKlassKlass* ikk = instanceKlassKlass::cast(Universe::instanceKlassKlassObj());
   132   return ikk->allocate_instance_klass(name, vtable_len, itable_len, static_field_size, nonstatic_oop_map_count, rt, CHECK_NULL);
   133 }
   136 constMethodOop oopFactory::new_constMethod(int byte_code_size,
   137                                            int compressed_line_number_size,
   138                                            int localvariable_table_length,
   139                                            int checked_exceptions_length,
   140                                            bool is_conc_safe,
   141                                            TRAPS) {
   142   klassOop cmkObj = Universe::constMethodKlassObj();
   143   constMethodKlass* cmk = constMethodKlass::cast(cmkObj);
   144   return cmk->allocate(byte_code_size, compressed_line_number_size,
   145                        localvariable_table_length, checked_exceptions_length,
   146                        is_conc_safe,
   147                        CHECK_NULL);
   148 }
   151 methodOop oopFactory::new_method(int byte_code_size, AccessFlags access_flags,
   152                                  int compressed_line_number_size,
   153                                  int localvariable_table_length,
   154                                  int checked_exceptions_length,
   155                                  bool is_conc_safe,
   156                                  TRAPS) {
   157   methodKlass* mk = methodKlass::cast(Universe::methodKlassObj());
   158   assert(!access_flags.is_native() || byte_code_size == 0,
   159          "native methods should not contain byte codes");
   160   constMethodOop cm = new_constMethod(byte_code_size,
   161                                       compressed_line_number_size,
   162                                       localvariable_table_length,
   163                                       checked_exceptions_length,
   164                                       is_conc_safe, CHECK_NULL);
   165   constMethodHandle rw(THREAD, cm);
   166   return mk->allocate(rw, access_flags, CHECK_NULL);
   167 }
   170 methodDataOop oopFactory::new_methodData(methodHandle method, TRAPS) {
   171   methodDataKlass* mdk = methodDataKlass::cast(Universe::methodDataKlassObj());
   172   return mdk->allocate(method, CHECK_NULL);
   173 }
   176 compiledICHolderOop oopFactory::new_compiledICHolder(methodHandle method, KlassHandle klass, TRAPS) {
   177   compiledICHolderKlass* ck = (compiledICHolderKlass*) Universe::compiledICHolderKlassObj()->klass_part();
   178   compiledICHolderOop c = ck->allocate(CHECK_NULL);
   179   c->set_holder_method(method());
   180   c->set_holder_klass(klass());
   181   return c;
   182 }

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