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comparison agent/src/share/classes/sun/jvm/hotspot/code/CodeBlob.java @ 0:a61af66fc99e jdk7-b24
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author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
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children | c18cbe5936b8 1a5913bf5e19 |
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1 /* | |
2 * Copyright 2000-2005 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
21 * have any questions. | |
22 * | |
23 */ | |
24 | |
25 package sun.jvm.hotspot.code; | |
26 | |
27 import java.io.*; | |
28 import java.util.*; | |
29 | |
30 import sun.jvm.hotspot.asm.x86.*; | |
31 import sun.jvm.hotspot.compiler.*; | |
32 import sun.jvm.hotspot.debugger.*; | |
33 import sun.jvm.hotspot.runtime.*; | |
34 import sun.jvm.hotspot.types.*; | |
35 import sun.jvm.hotspot.utilities.*; | |
36 | |
37 public class CodeBlob extends VMObject { | |
38 private static AddressField nameField; | |
39 private static CIntegerField sizeField; | |
40 private static CIntegerField headerSizeField; | |
41 private static CIntegerField relocationSizeField; | |
42 private static CIntegerField instructionsOffsetField; | |
43 private static CIntegerField frameCompleteOffsetField; | |
44 private static CIntegerField dataOffsetField; | |
45 private static CIntegerField oopsOffsetField; | |
46 private static CIntegerField oopsLengthField; | |
47 private static CIntegerField frameSizeField; | |
48 private static AddressField oopMapsField; | |
49 | |
50 // Only used by server compiler on x86; computed over in SA rather | |
51 // than relying on computation in target VM | |
52 private static final int NOT_YET_COMPUTED = -2; | |
53 private static final int UNDEFINED = -1; | |
54 private int linkOffset = NOT_YET_COMPUTED; | |
55 private static int matcherInterpreterFramePointerReg; | |
56 | |
57 static { | |
58 VM.registerVMInitializedObserver(new Observer() { | |
59 public void update(Observable o, Object data) { | |
60 initialize(VM.getVM().getTypeDataBase()); | |
61 } | |
62 }); | |
63 } | |
64 | |
65 private static void initialize(TypeDataBase db) { | |
66 Type type = db.lookupType("CodeBlob"); | |
67 | |
68 nameField = type.getAddressField("_name"); | |
69 sizeField = type.getCIntegerField("_size"); | |
70 headerSizeField = type.getCIntegerField("_header_size"); | |
71 relocationSizeField = type.getCIntegerField("_relocation_size"); | |
72 frameCompleteOffsetField = type.getCIntegerField("_frame_complete_offset"); | |
73 instructionsOffsetField = type.getCIntegerField("_instructions_offset"); | |
74 dataOffsetField = type.getCIntegerField("_data_offset"); | |
75 oopsOffsetField = type.getCIntegerField("_oops_offset"); | |
76 oopsLengthField = type.getCIntegerField("_oops_length"); | |
77 frameSizeField = type.getCIntegerField("_frame_size"); | |
78 oopMapsField = type.getAddressField("_oop_maps"); | |
79 | |
80 if (VM.getVM().isServerCompiler()) { | |
81 matcherInterpreterFramePointerReg = | |
82 db.lookupIntConstant("Matcher::interpreter_frame_pointer_reg").intValue(); | |
83 } | |
84 } | |
85 | |
86 public CodeBlob(Address addr) { | |
87 super(addr); | |
88 } | |
89 | |
90 // Typing | |
91 public boolean isBufferBlob() { return false; } | |
92 public boolean isNMethod() { return false; } | |
93 public boolean isRuntimeStub() { return false; } | |
94 public boolean isDeoptimizationStub() { return false; } | |
95 public boolean isUncommonTrapStub() { return false; } | |
96 public boolean isExceptionStub() { return false; } | |
97 public boolean isSafepointStub() { return false; } | |
98 | |
99 // Fine grain nmethod support: isNmethod() == isJavaMethod() || isNativeMethod() || isOSRMethod() | |
100 public boolean isJavaMethod() { return false; } | |
101 public boolean isNativeMethod() { return false; } | |
102 /** On-Stack Replacement method */ | |
103 public boolean isOSRMethod() { return false; } | |
104 | |
105 // Boundaries | |
106 public Address headerBegin() { | |
107 return addr; | |
108 } | |
109 | |
110 public Address headerEnd() { | |
111 return addr.addOffsetTo(headerSizeField.getValue(addr)); | |
112 } | |
113 | |
114 // FIXME: add RelocInfo | |
115 // public RelocInfo relocationBegin(); | |
116 // public RelocInfo relocationEnd(); | |
117 | |
118 public Address instructionsBegin() { | |
119 return headerBegin().addOffsetTo(instructionsOffsetField.getValue(addr)); | |
120 } | |
121 | |
122 public Address instructionsEnd() { | |
123 return headerBegin().addOffsetTo(dataOffsetField.getValue(addr)); | |
124 } | |
125 | |
126 public Address dataBegin() { | |
127 return headerBegin().addOffsetTo(dataOffsetField.getValue(addr)); | |
128 } | |
129 | |
130 public Address dataEnd() { | |
131 return headerBegin().addOffsetTo(sizeField.getValue(addr)); | |
132 } | |
133 | |
134 public Address oopsBegin() { | |
135 return headerBegin().addOffsetTo(oopsOffsetField.getValue(addr)); | |
136 } | |
137 | |
138 public Address oopsEnd() { | |
139 return oopsBegin().addOffsetTo(getOopsLength()); | |
140 } | |
141 | |
142 // Offsets | |
143 public int getRelocationOffset() { return (int) headerSizeField.getValue(addr); } | |
144 public int getInstructionsOffset() { return (int) instructionsOffsetField.getValue(addr); } | |
145 public int getDataOffset() { return (int) dataOffsetField.getValue(addr); } | |
146 public int getOopsOffset() { return (int) oopsOffsetField.getValue(addr); } | |
147 | |
148 // Sizes | |
149 public int getSize() { return (int) sizeField.getValue(addr); } | |
150 public int getHeaderSize() { return (int) headerSizeField.getValue(addr); } | |
151 // FIXME: add getRelocationSize() | |
152 public int getInstructionsSize() { return (int) instructionsEnd().minus(instructionsBegin()); } | |
153 public int getDataSize() { return (int) dataEnd().minus(dataBegin()); } | |
154 | |
155 // Containment | |
156 public boolean blobContains(Address addr) { return headerBegin().lessThanOrEqual(addr) && dataEnd().greaterThan(addr); } | |
157 // FIXME: add relocationContains | |
158 public boolean instructionsContains(Address addr) { return instructionsBegin().lessThanOrEqual(addr) && instructionsEnd().greaterThan(addr); } | |
159 public boolean dataContains(Address addr) { return dataBegin().lessThanOrEqual(addr) && dataEnd().greaterThan(addr); } | |
160 public boolean oopsContains(Address addr) { return oopsBegin().lessThanOrEqual(addr) && oopsEnd().greaterThan(addr); } | |
161 public boolean contains(Address addr) { return instructionsContains(addr); } | |
162 public boolean isFrameCompleteAt(Address a) { return instructionsContains(a) && a.minus(instructionsBegin()) >= frameCompleteOffsetField.getValue(addr); } | |
163 | |
164 /** Support for oops in scopes and relocs. Note: index 0 is reserved for null. */ | |
165 public OopHandle getOopAt(int index) { | |
166 if (index == 0) return null; | |
167 if (Assert.ASSERTS_ENABLED) { | |
168 Assert.that(index > 0 && index <= getOopsLength(), "must be a valid non-zero index"); | |
169 } | |
170 return oopsBegin().getOopHandleAt((index - 1) * VM.getVM().getOopSize()); | |
171 } | |
172 | |
173 // Reclamation support (really only used by the nmethods, but in order to get asserts to work | |
174 // in the CodeCache they are defined virtual here) | |
175 public boolean isZombie() { return false; } | |
176 public boolean isLockedByVM() { return false; } | |
177 | |
178 /** OopMap for frame; can return null if none available */ | |
179 public OopMapSet getOopMaps() { | |
180 Address oopMapsAddr = oopMapsField.getValue(addr); | |
181 if (oopMapsAddr == null) { | |
182 return null; | |
183 } | |
184 return new OopMapSet(oopMapsAddr); | |
185 } | |
186 // FIXME: not yet implementable | |
187 // void set_oop_maps(OopMapSet* p); | |
188 | |
189 public OopMap getOopMapForReturnAddress(Address returnAddress, boolean debugging) { | |
190 Address pc = returnAddress; | |
191 if (Assert.ASSERTS_ENABLED) { | |
192 Assert.that(getOopMaps() != null, "nope"); | |
193 } | |
194 return getOopMaps().findMapAtOffset(pc.minus(instructionsBegin()), debugging); | |
195 } | |
196 | |
197 // virtual void preserve_callee_argument_oops(frame fr, const RegisterMap* reg_map, void f(oop*)) { ShouldNotReachHere(); } | |
198 // FIXME; | |
199 | |
200 /** NOTE: this returns a size in BYTES in this system! */ | |
201 public long getFrameSize() { | |
202 return VM.getVM().getAddressSize() * frameSizeField.getValue(addr); | |
203 } | |
204 | |
205 // Returns true, if the next frame is responsible for GC'ing oops passed as arguments | |
206 public boolean callerMustGCArguments(JavaThread thread) { return false; } | |
207 | |
208 public String getName() { | |
209 return CStringUtilities.getString(nameField.getValue(addr)); | |
210 } | |
211 | |
212 // FIXME: NOT FINISHED | |
213 | |
214 // FIXME: add more accessors | |
215 | |
216 public void print() { | |
217 printOn(System.out); | |
218 } | |
219 | |
220 public void printOn(PrintStream tty) { | |
221 tty.print(getName()); | |
222 printComponentsOn(tty); | |
223 } | |
224 | |
225 protected void printComponentsOn(PrintStream tty) { | |
226 // FIXME: add relocation information | |
227 tty.println(" instructions: [" + instructionsBegin() + ", " + instructionsEnd() + "), " + | |
228 " data: [" + dataBegin() + ", " + dataEnd() + "), " + | |
229 " oops: [" + oopsBegin() + ", " + oopsEnd() + "), " + | |
230 " frame size: " + getFrameSize()); | |
231 } | |
232 | |
233 //-------------------------------------------------------------------------------- | |
234 // Internals only below this point | |
235 // | |
236 | |
237 private int getOopsLength() { | |
238 return (int) oopsLengthField.getValue(addr); | |
239 } | |
240 } |