1 /*
2 * Copyright (c) 2002, 2005, 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 // An object for encapsulating the machine/os dependent part of a JavaThread frame state
26 //
27 class JavaThread;
28
29 class JavaFrameAnchor VALUE_OBJ_CLASS_SPEC {
30 // Too many friends...
31 friend class CallNativeDirectNode;
32 friend class OptoRuntime;
33 friend class Runtime1;
34 friend class StubAssembler;
35 friend class CallRuntimeDirectNode;
36 friend class MacroAssembler;
37 friend class InterpreterGenerator;
38 friend class LIR_Assembler;
39 friend class GraphKit;
40 friend class StubGenerator;
41 friend class JavaThread;
42 friend class frame;
43 friend class VMStructs;
53 intptr_t* volatile _last_Java_sp;
54
55 // Whenever we call from Java to native we can not be assured that the return
56 // address that composes the last_Java_frame will be in an accessible location
57 // so calls from Java to native store that pc (or one good enough to locate
58 // the oopmap) in the frame anchor. Since the frames that call from Java to
59 // native are never deoptimized we never need to patch the pc and so this
60 // is acceptable.
61 volatile address _last_Java_pc;
62
63 // tells whether the last Java frame is set
64 // It is important that when last_Java_sp != NULL that the rest of the frame
65 // anchor (including platform specific) all be valid.
66
67 bool has_last_Java_frame() const { return _last_Java_sp != NULL; }
68 // This is very dangerous unless sp == NULL
69 // Invalidate the anchor so that has_last_frame is false
70 // and no one should look at the other fields.
71 void zap(void) { _last_Java_sp = NULL; }
72
73 #include "incls/_javaFrameAnchor_pd.hpp.incl"
74
75 public:
76 JavaFrameAnchor() { clear(); }
77 JavaFrameAnchor(JavaFrameAnchor *src) { copy(src); }
78
79 void set_last_Java_pc(address pc) { _last_Java_pc = pc; }
80
81 // Assembly stub generation helpers
82
83 static ByteSize last_Java_sp_offset() { return byte_offset_of(JavaFrameAnchor, _last_Java_sp); }
84 static ByteSize last_Java_pc_offset() { return byte_offset_of(JavaFrameAnchor, _last_Java_pc); }
85
86 };
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1 /*
2 * Copyright (c) 2002, 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_RUNTIME_JAVAFRAMEANCHOR_HPP
26 #define SHARE_VM_RUNTIME_JAVAFRAMEANCHOR_HPP
27
28 #include "utilities/globalDefinitions.hpp"
29 #ifdef TARGET_OS_ARCH_linux_x86
30 # include "orderAccess_linux_x86.inline.hpp"
31 #endif
32 #ifdef TARGET_OS_ARCH_linux_sparc
33 # include "orderAccess_linux_sparc.inline.hpp"
34 #endif
35 #ifdef TARGET_OS_ARCH_linux_zero
36 # include "orderAccess_linux_zero.inline.hpp"
37 #endif
38 #ifdef TARGET_OS_ARCH_solaris_x86
39 # include "orderAccess_solaris_x86.inline.hpp"
40 #endif
41 #ifdef TARGET_OS_ARCH_solaris_sparc
42 # include "orderAccess_solaris_sparc.inline.hpp"
43 #endif
44 #ifdef TARGET_OS_ARCH_windows_x86
45 # include "orderAccess_windows_x86.inline.hpp"
46 #endif
47 //
48 // An object for encapsulating the machine/os dependent part of a JavaThread frame state
49 //
50 class JavaThread;
51
52 class JavaFrameAnchor VALUE_OBJ_CLASS_SPEC {
53 // Too many friends...
54 friend class CallNativeDirectNode;
55 friend class OptoRuntime;
56 friend class Runtime1;
57 friend class StubAssembler;
58 friend class CallRuntimeDirectNode;
59 friend class MacroAssembler;
60 friend class InterpreterGenerator;
61 friend class LIR_Assembler;
62 friend class GraphKit;
63 friend class StubGenerator;
64 friend class JavaThread;
65 friend class frame;
66 friend class VMStructs;
76 intptr_t* volatile _last_Java_sp;
77
78 // Whenever we call from Java to native we can not be assured that the return
79 // address that composes the last_Java_frame will be in an accessible location
80 // so calls from Java to native store that pc (or one good enough to locate
81 // the oopmap) in the frame anchor. Since the frames that call from Java to
82 // native are never deoptimized we never need to patch the pc and so this
83 // is acceptable.
84 volatile address _last_Java_pc;
85
86 // tells whether the last Java frame is set
87 // It is important that when last_Java_sp != NULL that the rest of the frame
88 // anchor (including platform specific) all be valid.
89
90 bool has_last_Java_frame() const { return _last_Java_sp != NULL; }
91 // This is very dangerous unless sp == NULL
92 // Invalidate the anchor so that has_last_frame is false
93 // and no one should look at the other fields.
94 void zap(void) { _last_Java_sp = NULL; }
95
96 #ifdef TARGET_ARCH_x86
97 # include "javaFrameAnchor_x86.hpp"
98 #endif
99 #ifdef TARGET_ARCH_sparc
100 # include "javaFrameAnchor_sparc.hpp"
101 #endif
102 #ifdef TARGET_ARCH_zero
103 # include "javaFrameAnchor_zero.hpp"
104 #endif
105
106
107 public:
108 JavaFrameAnchor() { clear(); }
109 JavaFrameAnchor(JavaFrameAnchor *src) { copy(src); }
110
111 void set_last_Java_pc(address pc) { _last_Java_pc = pc; }
112
113 // Assembly stub generation helpers
114
115 static ByteSize last_Java_sp_offset() { return byte_offset_of(JavaFrameAnchor, _last_Java_sp); }
116 static ByteSize last_Java_pc_offset() { return byte_offset_of(JavaFrameAnchor, _last_Java_pc); }
117
118 };
119
120 #endif // SHARE_VM_RUNTIME_JAVAFRAMEANCHOR_HPP
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