Mercurial > hg > truffle
annotate src/share/vm/runtime/basicLock.hpp @ 7090:05ce1defa4f9
Common out some parts of UnsafeLoad/Store in UnsafeAccess
author | Gilles Duboscq <duboscq@ssw.jku.at> |
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date | Thu, 29 Nov 2012 13:24:08 +0100 |
parents | 3dbcd1013cc8 |
children | b8f261ba79c6 |
rev | line source |
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1878 | 1 /* |
1972 | 2 * Copyright (c) 1998, 2010, Oracle and/or its affiliates. All rights reserved. |
1878 | 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 | |
1972 | 25 #ifndef SHARE_VM_RUNTIME_BASICLOCK_HPP |
26 #define SHARE_VM_RUNTIME_BASICLOCK_HPP | |
27 | |
28 #include "oops/markOop.hpp" | |
29 #include "runtime/handles.hpp" | |
30 #include "utilities/top.hpp" | |
31 | |
1878 | 32 class BasicLock VALUE_OBJ_CLASS_SPEC { |
33 friend class VMStructs; | |
34 private: | |
35 volatile markOop _displaced_header; | |
36 public: | |
37 markOop displaced_header() const { return _displaced_header; } | |
38 void set_displaced_header(markOop header) { _displaced_header = header; } | |
39 | |
40 void print_on(outputStream* st) const; | |
41 | |
42 // move a basic lock (used during deoptimization | |
43 void move_to(oop obj, BasicLock* dest); | |
44 | |
45 static int displaced_header_offset_in_bytes() { return offset_of(BasicLock, _displaced_header); } | |
46 }; | |
47 | |
48 // A BasicObjectLock associates a specific Java object with a BasicLock. | |
49 // It is currently embedded in an interpreter frame. | |
50 | |
51 // Because some machines have alignment restrictions on the control stack, | |
52 // the actual space allocated by the interpreter may include padding words | |
53 // after the end of the BasicObjectLock. Also, in order to guarantee | |
54 // alignment of the embedded BasicLock objects on such machines, we | |
55 // put the embedded BasicLock at the beginning of the struct. | |
56 | |
57 class BasicObjectLock VALUE_OBJ_CLASS_SPEC { | |
58 friend class VMStructs; | |
59 private: | |
60 BasicLock _lock; // the lock, must be double word aligned | |
61 oop _obj; // object holds the lock; | |
62 | |
63 public: | |
64 // Manipulation | |
65 oop obj() const { return _obj; } | |
4668
3dbcd1013cc8
added flag PrintDeoptimizationDetails
Christian Haeubl <christian.haeubl@oracle.com>
parents:
1972
diff
changeset
|
66 oop* obj_addr() { return &_obj; } |
1878 | 67 void set_obj(oop obj) { _obj = obj; } |
68 BasicLock* lock() { return &_lock; } | |
69 | |
70 // Note: Use frame::interpreter_frame_monitor_size() for the size of BasicObjectLocks | |
71 // in interpreter activation frames since it includes machine-specific padding. | |
72 static int size() { return sizeof(BasicObjectLock)/wordSize; } | |
73 | |
74 // GC support | |
75 void oops_do(OopClosure* f) { f->do_oop(&_obj); } | |
76 | |
77 static int obj_offset_in_bytes() { return offset_of(BasicObjectLock, _obj); } | |
78 static int lock_offset_in_bytes() { return offset_of(BasicObjectLock, _lock); } | |
79 }; | |
80 | |
1972 | 81 |
82 #endif // SHARE_VM_RUNTIME_BASICLOCK_HPP |