Tue, 11 Mar 2008 11:25:13 -0700
6667620: (Escape Analysis) fix deoptimization for scalar replaced objects
Summary: Deoptimization code for reallocation and relocking scalar replaced objects has to be fixed.
Reviewed-by: rasbold, never
1 /*
2 * Copyright 1999-2007 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 * have any questions.
22 *
23 */
25 // ciInstanceKlass
26 //
27 // This class represents a klassOop in the HotSpot virtual machine
28 // whose Klass part is an instanceKlass. It may or may not
29 // be loaded.
30 class ciInstanceKlass : public ciKlass {
31 CI_PACKAGE_ACCESS
32 friend class ciEnv;
33 friend class ciMethod;
34 friend class ciField;
35 friend class ciBytecodeStream;
37 private:
38 bool _is_shared;
40 jobject _loader;
41 jobject _protection_domain;
43 bool _is_initialized;
44 bool _is_linked;
45 bool _has_finalizer;
46 bool _has_subklass;
47 ciFlags _flags;
48 jint _nonstatic_field_size;
49 jint _nonstatic_oop_map_size;
51 // Lazy fields get filled in only upon request.
52 ciInstanceKlass* _super;
53 ciInstance* _java_mirror;
55 ciConstantPoolCache* _field_cache; // cached map index->field
56 GrowableArray<ciField*>* _nonstatic_fields;
58 enum { implementors_limit = instanceKlass::implementors_limit };
59 ciInstanceKlass* _implementors[implementors_limit];
60 jint _nof_implementors;
62 GrowableArray<ciField*>* _non_static_fields;
64 protected:
65 ciInstanceKlass(KlassHandle h_k);
66 ciInstanceKlass(ciSymbol* name, jobject loader, jobject protection_domain);
68 instanceKlass* get_instanceKlass() const {
69 return (instanceKlass*)get_Klass();
70 }
72 oop loader();
73 jobject loader_handle();
75 oop protection_domain();
76 jobject protection_domain_handle();
78 const char* type_string() { return "ciInstanceKlass"; }
80 void print_impl(outputStream* st);
82 ciConstantPoolCache* field_cache();
84 bool is_shared() { return _is_shared; }
86 bool compute_shared_is_initialized();
87 bool compute_shared_is_linked();
88 bool compute_shared_has_subklass();
89 int compute_shared_nof_implementors();
90 int compute_nonstatic_fields();
91 GrowableArray<ciField*>* compute_nonstatic_fields_impl(GrowableArray<ciField*>* super_fields);
93 public:
94 // Has this klass been initialized?
95 bool is_initialized() {
96 if (_is_shared && !_is_initialized) {
97 return is_loaded() && compute_shared_is_initialized();
98 }
99 return _is_initialized;
100 }
101 // Has this klass been linked?
102 bool is_linked() {
103 if (_is_shared && !_is_linked) {
104 return is_loaded() && compute_shared_is_linked();
105 }
106 return _is_linked;
107 }
109 // General klass information.
110 ciFlags flags() {
111 assert(is_loaded(), "must be loaded");
112 return _flags;
113 }
114 bool has_finalizer() {
115 assert(is_loaded(), "must be loaded");
116 return _has_finalizer; }
117 bool has_subklass() {
118 assert(is_loaded(), "must be loaded");
119 if (_is_shared && !_has_subklass) {
120 if (flags().is_final()) {
121 return false;
122 } else {
123 return compute_shared_has_subklass();
124 }
125 }
126 return _has_subklass;
127 }
128 jint size_helper() {
129 return (Klass::layout_helper_size_in_bytes(layout_helper())
130 >> LogHeapWordSize);
131 }
132 jint nonstatic_field_size() {
133 assert(is_loaded(), "must be loaded");
134 return _nonstatic_field_size; }
135 jint nonstatic_oop_map_size() {
136 assert(is_loaded(), "must be loaded");
137 return _nonstatic_oop_map_size; }
138 ciInstanceKlass* super();
139 jint nof_implementors() {
140 assert(is_loaded(), "must be loaded");
141 if (_is_shared) return compute_shared_nof_implementors();
142 return _nof_implementors;
143 }
145 ciInstanceKlass* get_canonical_holder(int offset);
146 ciField* get_field_by_offset(int field_offset, bool is_static);
148 GrowableArray<ciField*>* non_static_fields();
150 // total number of nonstatic fields (including inherited):
151 int nof_nonstatic_fields() {
152 if (_nonstatic_fields == NULL)
153 return compute_nonstatic_fields();
154 else
155 return _nonstatic_fields->length();
156 }
157 // nth nonstatic field (presented by ascending address)
158 ciField* nonstatic_field_at(int i) {
159 assert(_nonstatic_fields != NULL, "");
160 return _nonstatic_fields->at(i);
161 }
163 ciInstanceKlass* unique_concrete_subklass();
164 bool has_finalizable_subclass();
166 bool contains_field_offset(int offset) {
167 return (offset/wordSize) >= instanceOopDesc::header_size()
168 && (offset/wordSize)-instanceOopDesc::header_size() < nonstatic_field_size();
169 }
171 // Get the instance of java.lang.Class corresponding to
172 // this klass. This instance is used for locking of
173 // synchronized static methods of this klass.
174 ciInstance* java_mirror();
176 // Java access flags
177 bool is_public () { return flags().is_public(); }
178 bool is_final () { return flags().is_final(); }
179 bool is_super () { return flags().is_super(); }
180 bool is_interface () { return flags().is_interface(); }
181 bool is_abstract () { return flags().is_abstract(); }
183 ciMethod* find_method(ciSymbol* name, ciSymbol* signature);
184 // Note: To find a method from name and type strings, use ciSymbol::make,
185 // but consider adding to vmSymbols.hpp instead.
187 bool is_leaf_type();
188 ciInstanceKlass* implementor(int n);
190 // Is the defining class loader of this class the default loader?
191 bool uses_default_loader();
193 bool is_java_lang_Object();
195 // What kind of ciObject is this?
196 bool is_instance_klass() { return true; }
197 bool is_java_klass() { return true; }
198 };