Mercurial > hg > graal-compiler
annotate agent/src/share/classes/sun/jvm/hotspot/runtime/RegisterMap.java @ 2426:1d1603768966
7010070: Update all 2010 Oracle-changed OpenJDK files to have the proper copyright dates - second pass
Summary: Update the copyright to be 2010 on all changed files in OpenJDK
Reviewed-by: ohair
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date | Tue, 05 Apr 2011 14:12:31 -0700 |
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0 | 1 /* |
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2 * Copyright (c) 2000, 2006, Oracle and/or its affiliates. All rights reserved. |
0 | 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 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
25 package sun.jvm.hotspot.runtime; | |
26 | |
27 import java.io.*; | |
28 import java.util.*; | |
29 | |
30 import sun.jvm.hotspot.debugger.*; | |
31 import sun.jvm.hotspot.interpreter.*; | |
32 import sun.jvm.hotspot.code.*; | |
33 import sun.jvm.hotspot.types.*; | |
34 import sun.jvm.hotspot.utilities.*; | |
35 | |
36 /** <P> A companion structure used for stack traversal. The | |
37 RegisterMap contains misc. information needed in order to do | |
38 correct stack traversal of stack frames. Hence, it must always be | |
39 passed in as an argument to Frame.sender(RegisterMap). </P> | |
40 | |
41 <P> The use of RegisterMaps is slightly different in the | |
42 Serviceability Agent APIs than in the VM itself. In the VM, a | |
43 RegisterMap is created either for a particular thread or cloned | |
44 from another RegisterMap. In these APIs, a JavaThread is the | |
45 top-level factory for RegisterMaps, and RegisterMaps know how to | |
46 copy themselves (through either the clone() or copy() | |
47 methods). </P> */ | |
48 | |
49 public abstract class RegisterMap implements Cloneable { | |
50 /** Location of registers */ | |
51 protected Address[] location; | |
52 // FIXME: don't know about LocationValidType | |
53 protected long[] locationValid; | |
54 /** Should include argument_oop marked locations for compiler */ | |
55 protected boolean includeArgumentOops; | |
56 /** Reference to current thread */ | |
57 protected JavaThread thread; | |
58 /** Tells if the register map needs to be updated when traversing the stack */ | |
59 protected boolean updateMap; | |
60 /** Location of a frame where the pc is not at a call (NULL if no frame exists) */ | |
61 protected static int regCount; | |
62 protected static int locationValidTypeSize; | |
63 protected static int locationValidSize; | |
64 | |
65 static { | |
66 VM.registerVMInitializedObserver(new Observer() { | |
67 public void update(Observable o, Object data) { | |
68 initialize(VM.getVM().getTypeDataBase()); | |
69 } | |
70 }); | |
71 } | |
72 | |
73 private static void initialize(TypeDataBase db) { | |
74 regCount = db.lookupIntConstant("ConcreteRegisterImpl::number_of_registers").intValue(); | |
75 // FIXME: don't know about LocationValidType. The LocationValidType is typedef'ed as julong | |
76 // so used julong to get the size of LocationValidType. | |
77 locationValidTypeSize = (int)db.lookupType("julong").getSize() * 8; | |
78 locationValidSize = (regCount + locationValidTypeSize - 1) / locationValidTypeSize; | |
79 } | |
80 | |
81 protected RegisterMap(JavaThread thread, boolean updateMap) { | |
82 this.thread = thread; | |
83 this.updateMap = updateMap; | |
84 location = new Address[regCount]; | |
85 locationValid = new long[locationValidSize]; | |
86 clear(); | |
87 } | |
88 | |
89 /** Makes a copy of map into this */ | |
90 protected RegisterMap(RegisterMap map) { | |
91 if (Assert.ASSERTS_ENABLED) { | |
92 Assert.that(map != null, "RegisterMap must be present"); | |
93 } | |
94 this.thread = map.getThread(); | |
95 this.updateMap = map.getUpdateMap(); | |
96 this.includeArgumentOops = map.getIncludeArgumentOops(); | |
97 location = new Address[map.location.length]; | |
98 locationValid = new long[map.locationValid.length]; | |
99 initializeFromPD(map); | |
100 if (updateMap) { | |
101 for (int i = 0; i < locationValidSize; i++) { | |
102 long bits = (!getUpdateMap()) ? 0 : map.locationValid[i]; | |
103 locationValid[i] = bits; | |
104 // for whichever bits are set, pull in the corresponding map->_location | |
105 int j = i*locationValidTypeSize; | |
106 while (bits != 0) { | |
107 if ((bits & 1) != 0) { | |
108 if (Assert.ASSERTS_ENABLED) { | |
109 Assert.that(0 <= j && j < regCount, "range check"); | |
110 } | |
111 location[j] = map.location[j]; | |
112 } | |
113 bits >>>= 1; | |
114 j += 1; | |
115 } | |
116 } | |
117 } | |
118 } | |
119 | |
120 public abstract Object clone(); | |
121 | |
122 public RegisterMap copy() { | |
123 return (RegisterMap) clone(); | |
124 } | |
125 | |
126 public void clear() { | |
127 setIncludeArgumentOops(true); | |
128 if (!VM.getVM().isCore()) { | |
129 if (updateMap) { | |
130 for (int i = 0; i < locationValid.length; i++) { | |
131 locationValid[i] = 0; | |
132 } | |
133 clearPD(); | |
134 } else { | |
135 initializePD(); | |
136 } | |
137 } | |
138 } | |
139 | |
140 public Address getLocation(VMReg reg) { | |
141 int i = reg.getValue(); | |
142 int index = i / locationValidTypeSize; | |
143 if (Assert.ASSERTS_ENABLED) { | |
144 Assert.that(0 <= i && i < regCount, "sanity check"); | |
145 Assert.that(0 <= index && index < locationValidSize, "sanity check"); | |
146 } | |
147 if ((locationValid[index] & (1 << i % locationValidTypeSize)) != 0) { | |
148 return location[i]; | |
149 } else { | |
150 return getLocationPD(reg); | |
151 } | |
152 } | |
153 | |
154 public void setLocation(VMReg reg, Address loc) { | |
155 int i = reg.getValue(); | |
156 int index = i / locationValidTypeSize; | |
157 if (Assert.ASSERTS_ENABLED) { | |
158 Assert.that(0 <= i && i < regCount, "sanity check"); | |
159 Assert.that(0 <= index && index < locationValidSize, "sanity check"); | |
160 Assert.that(updateMap, "updating map that does not need updating"); | |
161 } | |
162 location[i] = loc; | |
163 locationValid[index] |= (1 << (i % locationValidTypeSize)); | |
164 } | |
165 | |
166 public boolean getIncludeArgumentOops() { | |
167 return includeArgumentOops; | |
168 } | |
169 | |
170 public void setIncludeArgumentOops(boolean f) { | |
171 includeArgumentOops = f; | |
172 } | |
173 | |
174 public JavaThread getThread() { | |
175 return thread; | |
176 } | |
177 | |
178 public boolean getUpdateMap() { | |
179 return updateMap; | |
180 } | |
181 | |
182 public void print() { | |
183 printOn(System.out); | |
184 } | |
185 | |
186 public void printOn(PrintStream tty) { | |
187 tty.println("Register map"); | |
188 for (int i = 0; i < location.length; i++) { | |
189 Address src = getLocation(new VMReg(i)); | |
190 if (src != null) { | |
191 tty.print(" " + VMRegImpl.getRegisterName(i) + | |
192 " [" + src + "] = "); | |
193 if (src.andWithMask(VM.getVM().getAddressSize() - 1) != null) { | |
194 tty.print("<misaligned>"); | |
195 } else { | |
196 tty.print(src.getAddressAt(0)); | |
197 } | |
198 } | |
199 } | |
200 } | |
201 | |
202 /** Platform-dependent clear() functionality */ | |
203 protected abstract void clearPD(); | |
204 /** Platform-dependent initialize() functionality */ | |
205 protected abstract void initializePD(); | |
206 /** Platform-dependent initializeFrom() functionality */ | |
207 protected abstract void initializeFromPD(RegisterMap map); | |
208 /** Platform-dependent getLocation() functionality */ | |
209 protected abstract Address getLocationPD(VMReg reg); | |
210 } |