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src/share/vm/ci/ciObjArrayKlass.cpp@c775af091fe9 (annotated)

src/share/vm/ci/ciObjArrayKlass.cpp

Mon, 07 Oct 2013 10:41:56 -0700

author
twisti
date
Mon, 07 Oct 2013 10:41:56 -0700
changeset 5907
c775af091fe9
parent 4142
d8ce2825b193
child 5914
d13d7aba8c12
permissions
-rw-r--r--

8025566: EXCEPTION_ACCESS_VIOLATION in compiled by C1 String.valueOf method
Reviewed-by: kvn

duke@435 1 /*
coleenp@4037 2 * Copyright (c) 1999, 2012, Oracle and/or its affiliates. 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 *
trims@1907 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
trims@1907 20 * or visit www.oracle.com if you need additional information or have any
trims@1907 21 * questions.
duke@435 22 *
duke@435 23 */
duke@435 24
stefank@2314 25 #include "precompiled.hpp"
stefank@2314 26 #include "ci/ciInstanceKlass.hpp"
stefank@2314 27 #include "ci/ciObjArrayKlass.hpp"
stefank@2314 28 #include "ci/ciSymbol.hpp"
stefank@2314 29 #include "ci/ciUtilities.hpp"
stefank@2314 30 #include "oops/objArrayKlass.hpp"
duke@435 31
duke@435 32 // ciObjArrayKlass
duke@435 33 //
coleenp@4037 34 // This class represents a Klass* in the HotSpot virtual machine
coleenp@4142 35 // whose Klass part is an ObjArrayKlass.
duke@435 36
duke@435 37 // ------------------------------------------------------------------
duke@435 38 // ciObjArrayKlass::ciObjArrayKlass
duke@435 39 //
duke@435 40 // Constructor for loaded object array klasses.
duke@435 41 ciObjArrayKlass::ciObjArrayKlass(KlassHandle h_k) : ciArrayKlass(h_k) {
duke@435 42 assert(get_Klass()->oop_is_objArray(), "wrong type");
coleenp@4142 43 Klass* element_Klass = get_ObjArrayKlass()->bottom_klass();
coleenp@4037 44 _base_element_klass = CURRENT_ENV->get_klass(element_Klass);
duke@435 45 assert(_base_element_klass->is_instance_klass() ||
duke@435 46 _base_element_klass->is_type_array_klass(), "bad base klass");
duke@435 47 if (dimension() == 1) {
duke@435 48 _element_klass = _base_element_klass;
duke@435 49 } else {
duke@435 50 _element_klass = NULL;
duke@435 51 }
duke@435 52 if (!ciObjectFactory::is_initialized()) {
duke@435 53 assert(_element_klass->is_java_lang_Object(), "only arrays of object are shared");
duke@435 54 }
duke@435 55 }
duke@435 56
duke@435 57 // ------------------------------------------------------------------
duke@435 58 // ciObjArrayKlass::ciObjArrayKlass
duke@435 59 //
duke@435 60 // Constructor for unloaded object array klasses.
duke@435 61 ciObjArrayKlass::ciObjArrayKlass(ciSymbol* array_name,
duke@435 62 ciKlass* base_element_klass,
duke@435 63 int dimension)
duke@435 64 : ciArrayKlass(array_name,
coleenp@4037 65 dimension, T_OBJECT) {
duke@435 66 _base_element_klass = base_element_klass;
duke@435 67 assert(_base_element_klass->is_instance_klass() ||
duke@435 68 _base_element_klass->is_type_array_klass(), "bad base klass");
duke@435 69 if (dimension == 1) {
duke@435 70 _element_klass = base_element_klass;
duke@435 71 } else {
duke@435 72 _element_klass = NULL;
duke@435 73 }
duke@435 74 }
duke@435 75
duke@435 76 // ------------------------------------------------------------------
duke@435 77 // ciObjArrayKlass::element_klass
duke@435 78 //
duke@435 79 // What is the one-level element type of this array?
duke@435 80 ciKlass* ciObjArrayKlass::element_klass() {
duke@435 81 if (_element_klass == NULL) {
duke@435 82 assert(dimension() > 1, "_element_klass should not be NULL");
duke@435 83 // Produce the element klass.
duke@435 84 if (is_loaded()) {
duke@435 85 VM_ENTRY_MARK;
coleenp@4142 86 Klass* element_Klass = get_ObjArrayKlass()->element_klass();
coleenp@4037 87 _element_klass = CURRENT_THREAD_ENV->get_klass(element_Klass);
duke@435 88 } else {
duke@435 89 VM_ENTRY_MARK;
duke@435 90 // We are an unloaded array klass. Attempt to fetch our
duke@435 91 // element klass by name.
duke@435 92 _element_klass = CURRENT_THREAD_ENV->get_klass_by_name_impl(
duke@435 93 this,
jrose@2982 94 constantPoolHandle(),
duke@435 95 construct_array_name(base_element_klass()->name(),
duke@435 96 dimension() - 1),
duke@435 97 false);
duke@435 98 }
duke@435 99 }
duke@435 100 return _element_klass;
duke@435 101 }
duke@435 102
duke@435 103 // ------------------------------------------------------------------
duke@435 104 // ciObjArrayKlass::construct_array_name
duke@435 105 //
duke@435 106 // Build an array name from an element name and a dimension.
duke@435 107 ciSymbol* ciObjArrayKlass::construct_array_name(ciSymbol* element_name,
duke@435 108 int dimension) {
duke@435 109 EXCEPTION_CONTEXT;
duke@435 110 int element_len = element_name->utf8_length();
duke@435 111
coleenp@2497 112 Symbol* base_name_sym = element_name->get_symbol();
duke@435 113 char* name;
duke@435 114
duke@435 115 if (base_name_sym->byte_at(0) == '[' ||
duke@435 116 (base_name_sym->byte_at(0) == 'L' && // watch package name 'Lxx'
duke@435 117 base_name_sym->byte_at(element_len-1) == ';')) {
duke@435 118
duke@435 119 int new_len = element_len + dimension + 1; // for the ['s and '\0'
duke@435 120 name = CURRENT_THREAD_ENV->name_buffer(new_len);
duke@435 121
duke@435 122 int pos = 0;
duke@435 123 for ( ; pos < dimension; pos++) {
duke@435 124 name[pos] = '[';
duke@435 125 }
duke@435 126 strncpy(name+pos, (char*)element_name->base(), element_len);
duke@435 127 name[new_len-1] = '\0';
duke@435 128 } else {
duke@435 129 int new_len = 3 // for L, ;, and '\0'
duke@435 130 + dimension // for ['s
duke@435 131 + element_len;
duke@435 132
duke@435 133 name = CURRENT_THREAD_ENV->name_buffer(new_len);
duke@435 134 int pos = 0;
duke@435 135 for ( ; pos < dimension; pos++) {
duke@435 136 name[pos] = '[';
duke@435 137 }
duke@435 138 name[pos++] = 'L';
duke@435 139 strncpy(name+pos, (char*)element_name->base(), element_len);
duke@435 140 name[new_len-2] = ';';
duke@435 141 name[new_len-1] = '\0';
duke@435 142 }
duke@435 143 return ciSymbol::make(name);
duke@435 144 }
duke@435 145
duke@435 146 // ------------------------------------------------------------------
duke@435 147 // ciObjArrayKlass::make_impl
duke@435 148 //
duke@435 149 // Implementation of make.
duke@435 150 ciObjArrayKlass* ciObjArrayKlass::make_impl(ciKlass* element_klass) {
duke@435 151
duke@435 152 if (element_klass->is_loaded()) {
duke@435 153 EXCEPTION_CONTEXT;
duke@435 154 // The element klass is loaded
coleenp@4037 155 Klass* array = element_klass->get_Klass()->array_klass(THREAD);
duke@435 156 if (HAS_PENDING_EXCEPTION) {
duke@435 157 CLEAR_PENDING_EXCEPTION;
duke@435 158 CURRENT_THREAD_ENV->record_out_of_memory_failure();
duke@435 159 return ciEnv::unloaded_ciobjarrayklass();
duke@435 160 }
coleenp@4037 161 return CURRENT_THREAD_ENV->get_obj_array_klass(array);
duke@435 162 }
duke@435 163
duke@435 164 // The array klass was unable to be made or the element klass was
duke@435 165 // not loaded.
duke@435 166 ciSymbol* array_name = construct_array_name(element_klass->name(), 1);
duke@435 167 if (array_name == ciEnv::unloaded_cisymbol()) {
duke@435 168 return ciEnv::unloaded_ciobjarrayklass();
duke@435 169 }
duke@435 170 return
duke@435 171 CURRENT_ENV->get_unloaded_klass(element_klass, array_name)
duke@435 172 ->as_obj_array_klass();
duke@435 173 }
duke@435 174
duke@435 175 // ------------------------------------------------------------------
duke@435 176 // ciObjArrayKlass::make
duke@435 177 //
duke@435 178 // Make an array klass corresponding to the specified primitive type.
duke@435 179 ciObjArrayKlass* ciObjArrayKlass::make(ciKlass* element_klass) {
duke@435 180 GUARDED_VM_ENTRY(return make_impl(element_klass);)
duke@435 181 }

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