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rev 1025 : imported patch indy.compiler.patch
rev 1026 : imported patch indy.compiler.inline.patch
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--- old/src/share/vm/ci/ciObject.hpp
+++ new/src/share/vm/ci/ciObject.hpp
1 1 /*
2 2 * Copyright 1999-2006 Sun Microsystems, Inc. All Rights Reserved.
3 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 4 *
5 5 * This code is free software; you can redistribute it and/or modify it
6 6 * under the terms of the GNU General Public License version 2 only, as
7 7 * published by the Free Software Foundation.
8 8 *
9 9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 12 * version 2 for more details (a copy is included in the LICENSE file that
13 13 * accompanied this code).
14 14 *
15 15 * You should have received a copy of the GNU General Public License version
16 16 * 2 along with this work; if not, write to the Free Software Foundation,
17 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 18 *
19 19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 21 * have any questions.
22 22 *
23 23 */
24 24
25 25 // ciObject
26 26 //
27 27 // This class represents an oop in the HotSpot virtual machine.
28 28 // Its subclasses are structured in a hierarchy which mirrors
29 29 // an aggregate of the VM's oop and klass hierarchies (see
30 30 // oopHierarchy.hpp). Each instance of ciObject holds a handle
31 31 // to a corresponding oop on the VM side and provides routines
32 32 // for accessing the information in its oop. By using the ciObject
33 33 // hierarchy for accessing oops in the VM, the compiler ensures
34 34 // that it is safe with respect to garbage collection; that is,
35 35 // GC and compilation can proceed independently without
36 36 // interference.
37 37 //
38 38 // Within the VM, the oop and klass hierarchies are separate.
39 39 // The compiler interface does not preserve this separation --
40 40 // the distinction between `klassOop' and `Klass' are not
41 41 // reflected in the interface and instead the Klass hierarchy
42 42 // is directly modeled as the subclasses of ciKlass.
43 43 class ciObject : public ResourceObj {
44 44 CI_PACKAGE_ACCESS
45 45 friend class ciEnv;
46 46
47 47 private:
48 48 // A JNI handle referring to an oop in the VM. This
49 49 // handle may, in a small set of cases, correctly be NULL.
50 50 jobject _handle;
51 51 ciKlass* _klass;
52 52 uint _ident;
53 53
54 54 enum { FLAG_BITS = 2 };
55 55 enum {
56 56 PERM_FLAG = 1,
57 57 SCAVENGABLE_FLAG = 2
58 58 };
59 59 protected:
60 60 ciObject();
61 61 ciObject(oop o);
62 62 ciObject(Handle h);
63 63 ciObject(ciKlass* klass);
64 64
65 65 jobject handle() const { return _handle; }
66 66 // Get the VM oop that this object holds.
67 67 oop get_oop() const {
68 68 assert(_handle != NULL, "null oop");
69 69 return JNIHandles::resolve_non_null(_handle);
70 70 }
71 71
72 72 void init_flags_from(oop x) {
73 73 int flags = 0;
74 74 if (x != NULL) {
75 75 if (x->is_perm())
76 76 flags |= PERM_FLAG;
77 77 if (x->is_scavengable())
78 78 flags |= SCAVENGABLE_FLAG;
79 79 }
80 80 _ident |= flags;
81 81 }
82 82
83 83 // Virtual behavior of the print() method.
84 84 virtual void print_impl(outputStream* st) {}
85 85
86 86 virtual const char* type_string() { return "ciObject"; }
87 87
88 88 void set_ident(uint id);
89 89 public:
90 90 // The klass of this ciObject.
91 91 ciKlass* klass();
92 92
93 93 // A number unique to this object.
94 94 uint ident();
95 95
96 96 // Are two ciObjects equal?
97 97 bool equals(ciObject* obj);
98 98
99 99 // A hash value for the convenience of compilers.
100 100 int hash();
101 101
102 102 // Tells if this oop has an encoding as a constant.
103 103 // True if is_scavengable is false.
104 104 // Also true if ScavengeRootsInCode is non-zero.
105 105 // If it does not have an encoding, the compiler is responsible for
106 106 // making other arrangements for dealing with the oop.
107 107 // See ciEnv::make_array
108 108 bool can_be_constant();
109 109
110 110 // Tells if this oop should be made a constant.
111 111 // True if is_scavengable is false or ScavengeRootsInCode > 1.
112 112 bool should_be_constant();
113 113
114 114 // Is this object guaranteed to be in the permanent part of the heap?
115 115 // If so, CollectedHeap::can_elide_permanent_oop_store_barriers is relevant.
116 116 // If the answer is false, no guarantees are made.
117 117 bool is_perm() { return (_ident & PERM_FLAG) != 0; }
118 118
119 119 // Might this object possibly move during a scavenge operation?
120 120 // If the answer is true and ScavengeRootsInCode==0, the oop cannot be embedded in code.
121 121 bool is_scavengable() { return (_ident & SCAVENGABLE_FLAG) != 0; }
122 122
123 123 // The address which the compiler should embed into the
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124 124 // generated code to represent this oop. This address
125 125 // is not the true address of the oop -- it will get patched
126 126 // during nmethod creation.
127 127 //
128 128 // Usage note: no address arithmetic allowed. Oop must
129 129 // be registered with the oopRecorder.
130 130 jobject constant_encoding();
131 131
132 132 // What kind of ciObject is this?
133 133 virtual bool is_null_object() const { return false; }
134 + virtual bool is_call_site() const { return false; }
134 135 virtual bool is_cpcache() const { return false; }
135 136 virtual bool is_instance() { return false; }
136 137 virtual bool is_method() { return false; }
137 138 virtual bool is_method_data() { return false; }
139 + virtual bool is_method_handle() const { return false; }
138 140 virtual bool is_array() { return false; }
139 141 virtual bool is_obj_array() { return false; }
140 142 virtual bool is_type_array() { return false; }
141 143 virtual bool is_symbol() { return false; }
142 144 virtual bool is_type() { return false; }
143 145 virtual bool is_return_address() { return false; }
144 146 virtual bool is_klass() { return false; }
145 147 virtual bool is_instance_klass() { return false; }
146 148 virtual bool is_method_klass() { return false; }
147 149 virtual bool is_array_klass() { return false; }
148 150 virtual bool is_obj_array_klass() { return false; }
149 151 virtual bool is_type_array_klass() { return false; }
150 152 virtual bool is_symbol_klass() { return false; }
151 153 virtual bool is_klass_klass() { return false; }
152 154 virtual bool is_instance_klass_klass() { return false; }
153 155 virtual bool is_array_klass_klass() { return false; }
154 156 virtual bool is_obj_array_klass_klass() { return false; }
155 157 virtual bool is_type_array_klass_klass() { return false; }
156 158
157 159 // Is this a type or value which has no associated class?
158 160 // It is true of primitive types and null objects.
159 161 virtual bool is_classless() const { return false; }
160 162
161 163 // Is this ciObject a Java Language Object? That is,
162 164 // is the ciObject an instance or an array
163 165 virtual bool is_java_object() { return false; }
164 166
165 167 // Does this ciObject represent a Java Language class?
166 168 // That is, is the ciObject an instanceKlass or arrayKlass?
167 169 virtual bool is_java_klass() { return false; }
168 170
169 171 // Is this ciObject the ciInstanceKlass representing
170 172 // java.lang.Object()?
171 173 virtual bool is_java_lang_Object() { return false; }
172 174
173 175 // Does this ciObject refer to a real oop in the VM?
174 176 //
175 177 // Note: some ciObjects refer to oops which have yet to be
176 178 // created. We refer to these as "unloaded". Specifically,
177 179 // there are unloaded ciMethods, ciObjArrayKlasses, and
178 180 // ciInstanceKlasses. By convention the ciNullObject is
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179 181 // considered loaded, and primitive types are considered loaded.
180 182 bool is_loaded() const {
181 183 return handle() != NULL || is_classless();
182 184 }
183 185
184 186 // Subclass casting with assertions.
185 187 ciNullObject* as_null_object() {
186 188 assert(is_null_object(), "bad cast");
187 189 return (ciNullObject*)this;
188 190 }
191 + ciCallSite* as_call_site() {
192 + assert(is_call_site(), "bad cast");
193 + return (ciCallSite*) this;
194 + }
189 195 ciCPCache* as_cpcache() {
190 196 assert(is_cpcache(), "bad cast");
191 197 return (ciCPCache*) this;
192 198 }
193 199 ciInstance* as_instance() {
194 200 assert(is_instance(), "bad cast");
195 201 return (ciInstance*)this;
196 202 }
197 203 ciMethod* as_method() {
198 204 assert(is_method(), "bad cast");
199 205 return (ciMethod*)this;
200 206 }
201 207 ciMethodData* as_method_data() {
202 208 assert(is_method_data(), "bad cast");
203 209 return (ciMethodData*)this;
204 210 }
211 + ciMethodHandle* as_method_handle() {
212 + assert(is_method_handle(), "bad cast");
213 + return (ciMethodHandle*) this;
214 + }
205 215 ciArray* as_array() {
206 216 assert(is_array(), "bad cast");
207 217 return (ciArray*)this;
208 218 }
209 219 ciObjArray* as_obj_array() {
210 220 assert(is_obj_array(), "bad cast");
211 221 return (ciObjArray*)this;
212 222 }
213 223 ciTypeArray* as_type_array() {
214 224 assert(is_type_array(), "bad cast");
215 225 return (ciTypeArray*)this;
216 226 }
217 227 ciSymbol* as_symbol() {
218 228 assert(is_symbol(), "bad cast");
219 229 return (ciSymbol*)this;
220 230 }
221 231 ciType* as_type() {
222 232 assert(is_type(), "bad cast");
223 233 return (ciType*)this;
224 234 }
225 235 ciReturnAddress* as_return_address() {
226 236 assert(is_return_address(), "bad cast");
227 237 return (ciReturnAddress*)this;
228 238 }
229 239 ciKlass* as_klass() {
230 240 assert(is_klass(), "bad cast");
231 241 return (ciKlass*)this;
232 242 }
233 243 ciInstanceKlass* as_instance_klass() {
234 244 assert(is_instance_klass(), "bad cast");
235 245 return (ciInstanceKlass*)this;
236 246 }
237 247 ciMethodKlass* as_method_klass() {
238 248 assert(is_method_klass(), "bad cast");
239 249 return (ciMethodKlass*)this;
240 250 }
241 251 ciArrayKlass* as_array_klass() {
242 252 assert(is_array_klass(), "bad cast");
243 253 return (ciArrayKlass*)this;
244 254 }
245 255 ciObjArrayKlass* as_obj_array_klass() {
246 256 assert(is_obj_array_klass(), "bad cast");
247 257 return (ciObjArrayKlass*)this;
248 258 }
249 259 ciTypeArrayKlass* as_type_array_klass() {
250 260 assert(is_type_array_klass(), "bad cast");
251 261 return (ciTypeArrayKlass*)this;
252 262 }
253 263 ciSymbolKlass* as_symbol_klass() {
254 264 assert(is_symbol_klass(), "bad cast");
255 265 return (ciSymbolKlass*)this;
256 266 }
257 267 ciKlassKlass* as_klass_klass() {
258 268 assert(is_klass_klass(), "bad cast");
259 269 return (ciKlassKlass*)this;
260 270 }
261 271 ciInstanceKlassKlass* as_instance_klass_klass() {
262 272 assert(is_instance_klass_klass(), "bad cast");
263 273 return (ciInstanceKlassKlass*)this;
264 274 }
265 275 ciArrayKlassKlass* as_array_klass_klass() {
266 276 assert(is_array_klass_klass(), "bad cast");
267 277 return (ciArrayKlassKlass*)this;
268 278 }
269 279 ciObjArrayKlassKlass* as_obj_array_klass_klass() {
270 280 assert(is_obj_array_klass_klass(), "bad cast");
271 281 return (ciObjArrayKlassKlass*)this;
272 282 }
273 283 ciTypeArrayKlassKlass* as_type_array_klass_klass() {
274 284 assert(is_type_array_klass_klass(), "bad cast");
275 285 return (ciTypeArrayKlassKlass*)this;
276 286 }
277 287
278 288 // Print debugging output about this ciObject.
279 289 void print(outputStream* st = tty);
280 290
281 291 // Print debugging output about the oop this ciObject represents.
282 292 void print_oop(outputStream* st = tty);
283 293 };
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