Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/ci/ciObjArrayKlass.cpp@4ce7240d622c (annotated)

src/share/vm/ci/ciObjArrayKlass.cpp

Wed, 06 Jan 2010 14:22:39 -0800

author
never
date
Wed, 06 Jan 2010 14:22:39 -0800
changeset 1577
4ce7240d622c
parent 435
a61af66fc99e
child 1907
c18cbe5936b8
permissions
-rw-r--r--

6914300: ciEnv should export all well known classes
Reviewed-by: kvn, twisti

duke@435 1 /*
duke@435 2 * Copyright 1999-2007 Sun Microsystems, Inc. All Rights Reserved.
duke@435 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@435 4 *
duke@435 5 * This code is free software; you can redistribute it and/or modify it
duke@435 6 * under the terms of the GNU General Public License version 2 only, as
duke@435 7 * published by the Free Software Foundation.
duke@435 8 *
duke@435 9 * This code is distributed in the hope that it will be useful, but WITHOUT
duke@435 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@435 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
duke@435 12 * version 2 for more details (a copy is included in the LICENSE file that
duke@435 13 * accompanied this code).
duke@435 14 *
duke@435 15 * You should have received a copy of the GNU General Public License version
duke@435 16 * 2 along with this work; if not, write to the Free Software Foundation,
duke@435 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@435 18 *
duke@435 19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
duke@435 20 * CA 95054 USA or visit www.sun.com if you need additional information or
duke@435 21 * have any questions.
duke@435 22 *
duke@435 23 */
duke@435 24
duke@435 25 #include "incls/_precompiled.incl"
duke@435 26 #include "incls/_ciObjArrayKlass.cpp.incl"
duke@435 27
duke@435 28 // ciObjArrayKlass
duke@435 29 //
duke@435 30 // This class represents a klassOop in the HotSpot virtual machine
duke@435 31 // whose Klass part is an objArrayKlass.
duke@435 32
duke@435 33 // ------------------------------------------------------------------
duke@435 34 // ciObjArrayKlass::ciObjArrayKlass
duke@435 35 //
duke@435 36 // Constructor for loaded object array klasses.
duke@435 37 ciObjArrayKlass::ciObjArrayKlass(KlassHandle h_k) : ciArrayKlass(h_k) {
duke@435 38 assert(get_Klass()->oop_is_objArray(), "wrong type");
duke@435 39 klassOop element_klassOop = get_objArrayKlass()->bottom_klass();
duke@435 40 _base_element_klass = CURRENT_ENV->get_object(element_klassOop)->as_klass();
duke@435 41 assert(_base_element_klass->is_instance_klass() ||
duke@435 42 _base_element_klass->is_type_array_klass(), "bad base klass");
duke@435 43 if (dimension() == 1) {
duke@435 44 _element_klass = _base_element_klass;
duke@435 45 } else {
duke@435 46 _element_klass = NULL;
duke@435 47 }
duke@435 48 if (!ciObjectFactory::is_initialized()) {
duke@435 49 assert(_element_klass->is_java_lang_Object(), "only arrays of object are shared");
duke@435 50 }
duke@435 51 }
duke@435 52
duke@435 53 // ------------------------------------------------------------------
duke@435 54 // ciObjArrayKlass::ciObjArrayKlass
duke@435 55 //
duke@435 56 // Constructor for unloaded object array klasses.
duke@435 57 ciObjArrayKlass::ciObjArrayKlass(ciSymbol* array_name,
duke@435 58 ciKlass* base_element_klass,
duke@435 59 int dimension)
duke@435 60 : ciArrayKlass(array_name,
duke@435 61 dimension,
duke@435 62 ciObjArrayKlassKlass::make()) {
duke@435 63 _base_element_klass = base_element_klass;
duke@435 64 assert(_base_element_klass->is_instance_klass() ||
duke@435 65 _base_element_klass->is_type_array_klass(), "bad base klass");
duke@435 66 if (dimension == 1) {
duke@435 67 _element_klass = base_element_klass;
duke@435 68 } else {
duke@435 69 _element_klass = NULL;
duke@435 70 }
duke@435 71 }
duke@435 72
duke@435 73 // ------------------------------------------------------------------
duke@435 74 // ciObjArrayKlass::element_klass
duke@435 75 //
duke@435 76 // What is the one-level element type of this array?
duke@435 77 ciKlass* ciObjArrayKlass::element_klass() {
duke@435 78 if (_element_klass == NULL) {
duke@435 79 assert(dimension() > 1, "_element_klass should not be NULL");
duke@435 80 // Produce the element klass.
duke@435 81 if (is_loaded()) {
duke@435 82 VM_ENTRY_MARK;
duke@435 83 klassOop element_klassOop = get_objArrayKlass()->element_klass();
duke@435 84 _element_klass = CURRENT_THREAD_ENV->get_object(element_klassOop)->as_klass();
duke@435 85 } else {
duke@435 86 VM_ENTRY_MARK;
duke@435 87 // We are an unloaded array klass. Attempt to fetch our
duke@435 88 // element klass by name.
duke@435 89 _element_klass = CURRENT_THREAD_ENV->get_klass_by_name_impl(
duke@435 90 this,
duke@435 91 construct_array_name(base_element_klass()->name(),
duke@435 92 dimension() - 1),
duke@435 93 false);
duke@435 94 }
duke@435 95 }
duke@435 96 return _element_klass;
duke@435 97 }
duke@435 98
duke@435 99 // ------------------------------------------------------------------
duke@435 100 // ciObjArrayKlass::construct_array_name
duke@435 101 //
duke@435 102 // Build an array name from an element name and a dimension.
duke@435 103 ciSymbol* ciObjArrayKlass::construct_array_name(ciSymbol* element_name,
duke@435 104 int dimension) {
duke@435 105 EXCEPTION_CONTEXT;
duke@435 106 int element_len = element_name->utf8_length();
duke@435 107
duke@435 108 symbolOop base_name_sym = element_name->get_symbolOop();
duke@435 109 char* name;
duke@435 110
duke@435 111 if (base_name_sym->byte_at(0) == '[' ||
duke@435 112 (base_name_sym->byte_at(0) == 'L' && // watch package name 'Lxx'
duke@435 113 base_name_sym->byte_at(element_len-1) == ';')) {
duke@435 114
duke@435 115 int new_len = element_len + dimension + 1; // for the ['s and '\0'
duke@435 116 name = CURRENT_THREAD_ENV->name_buffer(new_len);
duke@435 117
duke@435 118 int pos = 0;
duke@435 119 for ( ; pos < dimension; pos++) {
duke@435 120 name[pos] = '[';
duke@435 121 }
duke@435 122 strncpy(name+pos, (char*)element_name->base(), element_len);
duke@435 123 name[new_len-1] = '\0';
duke@435 124 } else {
duke@435 125 int new_len = 3 // for L, ;, and '\0'
duke@435 126 + dimension // for ['s
duke@435 127 + element_len;
duke@435 128
duke@435 129 name = CURRENT_THREAD_ENV->name_buffer(new_len);
duke@435 130 int pos = 0;
duke@435 131 for ( ; pos < dimension; pos++) {
duke@435 132 name[pos] = '[';
duke@435 133 }
duke@435 134 name[pos++] = 'L';
duke@435 135 strncpy(name+pos, (char*)element_name->base(), element_len);
duke@435 136 name[new_len-2] = ';';
duke@435 137 name[new_len-1] = '\0';
duke@435 138 }
duke@435 139 return ciSymbol::make(name);
duke@435 140 }
duke@435 141
duke@435 142 // ------------------------------------------------------------------
duke@435 143 // ciObjArrayKlass::make_impl
duke@435 144 //
duke@435 145 // Implementation of make.
duke@435 146 ciObjArrayKlass* ciObjArrayKlass::make_impl(ciKlass* element_klass) {
duke@435 147
duke@435 148 if (element_klass->is_loaded()) {
duke@435 149 EXCEPTION_CONTEXT;
duke@435 150 // The element klass is loaded
duke@435 151 klassOop array = element_klass->get_Klass()->array_klass(THREAD);
duke@435 152 if (HAS_PENDING_EXCEPTION) {
duke@435 153 CLEAR_PENDING_EXCEPTION;
duke@435 154 CURRENT_THREAD_ENV->record_out_of_memory_failure();
duke@435 155 return ciEnv::unloaded_ciobjarrayklass();
duke@435 156 }
duke@435 157 return CURRENT_THREAD_ENV->get_object(array)->as_obj_array_klass();
duke@435 158 }
duke@435 159
duke@435 160 // The array klass was unable to be made or the element klass was
duke@435 161 // not loaded.
duke@435 162 ciSymbol* array_name = construct_array_name(element_klass->name(), 1);
duke@435 163 if (array_name == ciEnv::unloaded_cisymbol()) {
duke@435 164 return ciEnv::unloaded_ciobjarrayklass();
duke@435 165 }
duke@435 166 return
duke@435 167 CURRENT_ENV->get_unloaded_klass(element_klass, array_name)
duke@435 168 ->as_obj_array_klass();
duke@435 169 }
duke@435 170
duke@435 171 // ------------------------------------------------------------------
duke@435 172 // ciObjArrayKlass::make
duke@435 173 //
duke@435 174 // Make an array klass corresponding to the specified primitive type.
duke@435 175 ciObjArrayKlass* ciObjArrayKlass::make(ciKlass* element_klass) {
duke@435 176 assert(element_klass->is_java_klass(), "wrong kind of klass");
duke@435 177 GUARDED_VM_ENTRY(return make_impl(element_klass);)
duke@435 178 }

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