1 /*
2 * Copyright (c) 1999, 2006, 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 */
24
25 // ciObject
26 //
27 // This class represents an oop in the HotSpot virtual machine.
28 // Its subclasses are structured in a hierarchy which mirrors
29 // an aggregate of the VM's oop and klass hierarchies (see
30 // oopHierarchy.hpp). Each instance of ciObject holds a handle
31 // to a corresponding oop on the VM side and provides routines
32 // for accessing the information in its oop. By using the ciObject
33 // hierarchy for accessing oops in the VM, the compiler ensures
34 // that it is safe with respect to garbage collection; that is,
35 // GC and compilation can proceed independently without
36 // interference.
37 //
38 // Within the VM, the oop and klass hierarchies are separate.
39 // The compiler interface does not preserve this separation --
40 // the distinction between `klassOop' and `Klass' are not
41 // reflected in the interface and instead the Klass hierarchy
42 // is directly modeled as the subclasses of ciKlass.
43 class ciObject : public ResourceObj {
44 CI_PACKAGE_ACCESS
274 }
275 ciArrayKlassKlass* as_array_klass_klass() {
276 assert(is_array_klass_klass(), "bad cast");
277 return (ciArrayKlassKlass*)this;
278 }
279 ciObjArrayKlassKlass* as_obj_array_klass_klass() {
280 assert(is_obj_array_klass_klass(), "bad cast");
281 return (ciObjArrayKlassKlass*)this;
282 }
283 ciTypeArrayKlassKlass* as_type_array_klass_klass() {
284 assert(is_type_array_klass_klass(), "bad cast");
285 return (ciTypeArrayKlassKlass*)this;
286 }
287
288 // Print debugging output about this ciObject.
289 void print(outputStream* st = tty);
290
291 // Print debugging output about the oop this ciObject represents.
292 void print_oop(outputStream* st = tty);
293 };
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1 /*
2 * Copyright (c) 1999, 2010, 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 */
24
25 #ifndef SHARE_VM_CI_CIOBJECT_HPP
26 #define SHARE_VM_CI_CIOBJECT_HPP
27
28 #include "ci/ciClassList.hpp"
29 #include "memory/allocation.hpp"
30 #include "runtime/handles.hpp"
31 #include "runtime/jniHandles.hpp"
32
33 // ciObject
34 //
35 // This class represents an oop in the HotSpot virtual machine.
36 // Its subclasses are structured in a hierarchy which mirrors
37 // an aggregate of the VM's oop and klass hierarchies (see
38 // oopHierarchy.hpp). Each instance of ciObject holds a handle
39 // to a corresponding oop on the VM side and provides routines
40 // for accessing the information in its oop. By using the ciObject
41 // hierarchy for accessing oops in the VM, the compiler ensures
42 // that it is safe with respect to garbage collection; that is,
43 // GC and compilation can proceed independently without
44 // interference.
45 //
46 // Within the VM, the oop and klass hierarchies are separate.
47 // The compiler interface does not preserve this separation --
48 // the distinction between `klassOop' and `Klass' are not
49 // reflected in the interface and instead the Klass hierarchy
50 // is directly modeled as the subclasses of ciKlass.
51 class ciObject : public ResourceObj {
52 CI_PACKAGE_ACCESS
282 }
283 ciArrayKlassKlass* as_array_klass_klass() {
284 assert(is_array_klass_klass(), "bad cast");
285 return (ciArrayKlassKlass*)this;
286 }
287 ciObjArrayKlassKlass* as_obj_array_klass_klass() {
288 assert(is_obj_array_klass_klass(), "bad cast");
289 return (ciObjArrayKlassKlass*)this;
290 }
291 ciTypeArrayKlassKlass* as_type_array_klass_klass() {
292 assert(is_type_array_klass_klass(), "bad cast");
293 return (ciTypeArrayKlassKlass*)this;
294 }
295
296 // Print debugging output about this ciObject.
297 void print(outputStream* st = tty);
298
299 // Print debugging output about the oop this ciObject represents.
300 void print_oop(outputStream* st = tty);
301 };
302
303 #endif // SHARE_VM_CI_CIOBJECT_HPP
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