1 /*
2 * Copyright (c) 2002, 2011, 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 #ifdef TARGET_OS_ARCH_linux_arm
48 # include "orderAccess_linux_arm.inline.hpp"
49 #endif
50 #ifdef TARGET_OS_ARCH_linux_ppc
51 # include "orderAccess_linux_ppc.inline.hpp"
52 #endif
53 #ifdef TARGET_OS_ARCH_bsd_x86
54 # include "orderAccess_bsd_x86.inline.hpp"
55 #endif
56 #ifdef TARGET_OS_ARCH_bsd_zero
57 # include "orderAccess_bsd_zero.inline.hpp"
58 #endif
59
60 //
61 // An object for encapsulating the machine/os dependent part of a JavaThread frame state
62 //
63 class JavaThread;
64
65 class JavaFrameAnchor VALUE_OBJ_CLASS_SPEC {
66 // Too many friends...
67 friend class CallNativeDirectNode;
68 friend class OptoRuntime;
69 friend class Runtime1;
70 friend class StubAssembler;
71 friend class CallRuntimeDirectNode;
72 friend class MacroAssembler;
73 friend class InterpreterGenerator;
74 friend class LIR_Assembler;
75 friend class GraphKit;
76 friend class StubGenerator;
77 friend class JavaThread;
78 friend class frame;
79 friend class VMStructs;
80 friend class BytecodeInterpreter;
81 friend class JavaCallWrapper;
82
83 private:
84 //
85 // Whenever _last_Java_sp != NULL other anchor fields MUST be valid!
86 // The stack may not be walkable [check with walkable() ] but the values must be valid.
87 // The profiler apparently depends on this.
88 //
89 intptr_t* volatile _last_Java_sp;
90
91 // Whenever we call from Java to native we can not be assured that the return
92 // address that composes the last_Java_frame will be in an accessible location
93 // so calls from Java to native store that pc (or one good enough to locate
94 // the oopmap) in the frame anchor. Since the frames that call from Java to
95 // native are never deoptimized we never need to patch the pc and so this
96 // is acceptable.
97 volatile address _last_Java_pc;
98
99 // tells whether the last Java frame is set
100 // It is important that when last_Java_sp != NULL that the rest of the frame
101 // anchor (including platform specific) all be valid.
102
103 bool has_last_Java_frame() const { return _last_Java_sp != NULL; }
104 // This is very dangerous unless sp == NULL
105 // Invalidate the anchor so that has_last_frame is false
106 // and no one should look at the other fields.
107 void zap(void) { _last_Java_sp = NULL; }
108
109 #ifdef TARGET_ARCH_x86
110 # include "javaFrameAnchor_x86.hpp"
111 #endif
112 #ifdef TARGET_ARCH_sparc
113 # include "javaFrameAnchor_sparc.hpp"
114 #endif
115 #ifdef TARGET_ARCH_zero
116 # include "javaFrameAnchor_zero.hpp"
117 #endif
118 #ifdef TARGET_ARCH_arm
119 # include "javaFrameAnchor_arm.hpp"
120 #endif
121 #ifdef TARGET_ARCH_ppc
122 # include "javaFrameAnchor_ppc.hpp"
123 #endif
124
125
126 public:
127 JavaFrameAnchor() { clear(); }
128 JavaFrameAnchor(JavaFrameAnchor *src) { copy(src); }
129
130 void set_last_Java_pc(address pc) { _last_Java_pc = pc; }
131
132 // Assembly stub generation helpers
133
134 static ByteSize last_Java_sp_offset() { return byte_offset_of(JavaFrameAnchor, _last_Java_sp); }
135 static ByteSize last_Java_pc_offset() { return byte_offset_of(JavaFrameAnchor, _last_Java_pc); }
136
137 };
138
139 #endif // SHARE_VM_RUNTIME_JAVAFRAMEANCHOR_HPP