1 /*
2 * Copyright 2000-2010 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 frameSizeField;
46 private static AddressField oopMapsField;
47
48 // Only used by server compiler on x86; computed over in SA rather
49 // than relying on computation in target VM
50 private static final int NOT_YET_COMPUTED = -2;
51 private static final int UNDEFINED = -1;
52 private int linkOffset = NOT_YET_COMPUTED;
53 private static int matcherInterpreterFramePointerReg;
54
55 static {
56 VM.registerVMInitializedObserver(new Observer() {
57 public void update(Observable o, Object data) {
58 initialize(VM.getVM().getTypeDataBase());
59 }
60 });
61 }
62
63 private static void initialize(TypeDataBase db) {
64 Type type = db.lookupType("CodeBlob");
65
66 nameField = type.getAddressField("_name");
67 sizeField = type.getCIntegerField("_size");
68 headerSizeField = type.getCIntegerField("_header_size");
69 relocationSizeField = type.getCIntegerField("_relocation_size");
70 frameCompleteOffsetField = type.getCIntegerField("_frame_complete_offset");
71 instructionsOffsetField = type.getCIntegerField("_instructions_offset");
72 dataOffsetField = type.getCIntegerField("_data_offset");
73 frameSizeField = type.getCIntegerField("_frame_size");
74 oopMapsField = type.getAddressField("_oop_maps");
75
76 if (VM.getVM().isServerCompiler()) {
77 matcherInterpreterFramePointerReg =
78 db.lookupIntConstant("Matcher::interpreter_frame_pointer_reg").intValue();
79 }
80 }
81
82 public CodeBlob(Address addr) {
83 super(addr);
84 }
85
86 // Typing
87 public boolean isBufferBlob() { return false; }
88 public boolean isNMethod() { return false; }
89 public boolean isRuntimeStub() { return false; }
90 public boolean isDeoptimizationStub() { return false; }
91 public boolean isUncommonTrapStub() { return false; }
92 public boolean isExceptionStub() { return false; }
93 public boolean isSafepointStub() { return false; }
94
95 // Fine grain nmethod support: isNmethod() == isJavaMethod() || isNativeMethod() || isOSRMethod()
96 public boolean isJavaMethod() { return false; }
97 public boolean isNativeMethod() { return false; }
98 /** On-Stack Replacement method */
99 public boolean isOSRMethod() { return false; }
100
101 // Boundaries
102 public Address headerBegin() {
103 return addr;
104 }
105
106 public Address headerEnd() {
107 return addr.addOffsetTo(headerSizeField.getValue(addr));
108 }
109
110 // FIXME: add RelocInfo
111 // public RelocInfo relocationBegin();
112 // public RelocInfo relocationEnd();
113
114 public Address instructionsBegin() {
115 return headerBegin().addOffsetTo(instructionsOffsetField.getValue(addr));
116 }
117
118 public Address instructionsEnd() {
119 return headerBegin().addOffsetTo(dataOffsetField.getValue(addr));
120 }
121
122 public Address dataBegin() {
123 return headerBegin().addOffsetTo(dataOffsetField.getValue(addr));
124 }
125
126 public Address dataEnd() {
127 return headerBegin().addOffsetTo(sizeField.getValue(addr));
128 }
129
130 // Offsets
131 public int getRelocationOffset() { return (int) headerSizeField.getValue(addr); }
132 public int getInstructionsOffset() { return (int) instructionsOffsetField.getValue(addr); }
133 public int getDataOffset() { return (int) dataOffsetField.getValue(addr); }
134
135 // Sizes
136 public int getSize() { return (int) sizeField.getValue(addr); }
137 public int getHeaderSize() { return (int) headerSizeField.getValue(addr); }
138 // FIXME: add getRelocationSize()
139 public int getInstructionsSize() { return (int) instructionsEnd().minus(instructionsBegin()); }
140 public int getDataSize() { return (int) dataEnd().minus(dataBegin()); }
141
142 // Containment
143 public boolean blobContains(Address addr) { return headerBegin().lessThanOrEqual(addr) && dataEnd().greaterThan(addr); }
144 // FIXME: add relocationContains
145 public boolean instructionsContains(Address addr) { return instructionsBegin().lessThanOrEqual(addr) && instructionsEnd().greaterThan(addr); }
146 public boolean dataContains(Address addr) { return dataBegin().lessThanOrEqual(addr) && dataEnd().greaterThan(addr); }
147 public boolean contains(Address addr) { return instructionsContains(addr); }
148 public boolean isFrameCompleteAt(Address a) { return instructionsContains(a) && a.minus(instructionsBegin()) >= frameCompleteOffsetField.getValue(addr); }
149
150 // Reclamation support (really only used by the nmethods, but in order to get asserts to work
151 // in the CodeCache they are defined virtual here)
152 public boolean isZombie() { return false; }
153 public boolean isLockedByVM() { return false; }
154
155 /** OopMap for frame; can return null if none available */
156 public OopMapSet getOopMaps() {
157 Address oopMapsAddr = oopMapsField.getValue(addr);
158 if (oopMapsAddr == null) {
159 return null;
160 }
161 return new OopMapSet(oopMapsAddr);
162 }
163 // FIXME: not yet implementable
164 // void set_oop_maps(OopMapSet* p);
165
166 public OopMap getOopMapForReturnAddress(Address returnAddress, boolean debugging) {
167 Address pc = returnAddress;
168 if (Assert.ASSERTS_ENABLED) {
169 Assert.that(getOopMaps() != null, "nope");
170 }
171 return getOopMaps().findMapAtOffset(pc.minus(instructionsBegin()), debugging);
172 }
173
174 // virtual void preserve_callee_argument_oops(frame fr, const RegisterMap* reg_map, void f(oop*)) { ShouldNotReachHere(); }
175 // FIXME;
176
177 /** NOTE: this returns a size in BYTES in this system! */
178 public long getFrameSize() {
179 return VM.getVM().getAddressSize() * frameSizeField.getValue(addr);
180 }
181
182 // Returns true, if the next frame is responsible for GC'ing oops passed as arguments
183 public boolean callerMustGCArguments(JavaThread thread) { return false; }
184
185 public String getName() {
186 return CStringUtilities.getString(nameField.getValue(addr));
187 }
188
189 // FIXME: NOT FINISHED
190
191 // FIXME: add more accessors
192
193 public void print() {
194 printOn(System.out);
195 }
196
197 public void printOn(PrintStream tty) {
198 tty.print(getName());
199 printComponentsOn(tty);
200 }
201
202 protected void printComponentsOn(PrintStream tty) {
203 tty.println(" instructions: [" + instructionsBegin() + ", " + instructionsEnd() + "), " +
204 " data: [" + dataBegin() + ", " + dataEnd() + "), " +
205 " frame size: " + getFrameSize());
206 }
207 }