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 }