1 /*
2 * Copyright (c) 2000, 2012, 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 package sun.jvm.hotspot.code;
26
27 import java.io.*;
28 import java.util.*;
29
30 import sun.jvm.hotspot.compiler.*;
31 import sun.jvm.hotspot.debugger.*;
32 import sun.jvm.hotspot.runtime.*;
33 import sun.jvm.hotspot.types.*;
34 import sun.jvm.hotspot.utilities.*;
35
36 public class CodeBlob extends VMObject {
37 private static AddressField nameField;
38 private static CIntegerField sizeField;
39 private static CIntegerField headerSizeField;
40 private static CIntegerField relocationSizeField;
41 private static CIntegerField contentOffsetField;
42 private static CIntegerField codeOffsetField;
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 contentOffsetField = type.getCIntegerField("_content_offset");
72 codeOffsetField = type.getCIntegerField("_code_offset");
73 dataOffsetField = type.getCIntegerField("_data_offset");
74 frameSizeField = type.getCIntegerField("_frame_size");
75 oopMapsField = type.getAddressField("_oop_maps");
76
77 if (VM.getVM().isServerCompiler()) {
78 matcherInterpreterFramePointerReg =
79 db.lookupIntConstant("Matcher::interpreter_frame_pointer_reg").intValue();
80 }
81 }
82
83 public CodeBlob(Address addr) {
84 super(addr);
85 }
86
87 // Typing
88 public boolean isBufferBlob() { return false; }
89 public boolean isNMethod() { return false; }
90 public boolean isRuntimeStub() { return false; }
91 public boolean isDeoptimizationStub() { return false; }
92 public boolean isUncommonTrapStub() { return false; }
93 public boolean isExceptionStub() { return false; }
94 public boolean isSafepointStub() { return false; }
95 public boolean isAdapterBlob() { return false; }
96
97 // Fine grain nmethod support: isNmethod() == isJavaMethod() || isNativeMethod() || isOSRMethod()
98 public boolean isJavaMethod() { return false; }
99 public boolean isNativeMethod() { return false; }
100 /** On-Stack Replacement method */
101 public boolean isOSRMethod() { return false; }
102
103 public NMethod asNMethodOrNull() {
104 if (isNMethod()) return (NMethod)this;
105 return null;
106 }
107
108 // Boundaries
109 public Address headerBegin() {
110 return addr;
111 }
112
113 public Address headerEnd() {
114 return addr.addOffsetTo(headerSizeField.getValue(addr));
115 }
116
117 // FIXME: add RelocInfo
118 // public RelocInfo relocationBegin();
119 // public RelocInfo relocationEnd();
120
121 public Address contentBegin() {
122 return headerBegin().addOffsetTo(contentOffsetField.getValue(addr));
123 }
124
125 public Address contentEnd() {
126 return headerBegin().addOffsetTo(dataOffsetField.getValue(addr));
127 }
128
129 public Address codeBegin() {
130 return headerBegin().addOffsetTo(contentOffsetField.getValue(addr));
131 }
132
133 public Address codeEnd() {
134 return headerBegin().addOffsetTo(dataOffsetField.getValue(addr));
135 }
136
137 public Address dataBegin() {
138 return headerBegin().addOffsetTo(dataOffsetField.getValue(addr));
139 }
140
141 public Address dataEnd() {
142 return headerBegin().addOffsetTo(sizeField.getValue(addr));
143 }
144
145 // Offsets
146 public int getRelocationOffset() { return (int) headerSizeField .getValue(addr); }
147 public int getContentOffset() { return (int) contentOffsetField.getValue(addr); }
148 public int getCodeOffset() { return (int) codeOffsetField .getValue(addr); }
149 public int getDataOffset() { return (int) dataOffsetField .getValue(addr); }
150
151 // Sizes
152 public int getSize() { return (int) sizeField .getValue(addr); }
153 public int getHeaderSize() { return (int) headerSizeField.getValue(addr); }
154 // FIXME: add getRelocationSize()
155 public int getContentSize() { return (int) contentEnd().minus(contentBegin()); }
156 public int getCodeSize() { return (int) codeEnd() .minus(codeBegin()); }
157 public int getDataSize() { return (int) dataEnd() .minus(dataBegin()); }
158
159 // Containment
160 public boolean blobContains(Address addr) { return headerBegin() .lessThanOrEqual(addr) && dataEnd() .greaterThan(addr); }
161 // FIXME: add relocationContains
162 public boolean contentContains(Address addr) { return contentBegin().lessThanOrEqual(addr) && contentEnd().greaterThan(addr); }
163 public boolean codeContains(Address addr) { return codeBegin() .lessThanOrEqual(addr) && codeEnd() .greaterThan(addr); }
164 public boolean dataContains(Address addr) { return dataBegin() .lessThanOrEqual(addr) && dataEnd() .greaterThan(addr); }
165 public boolean contains(Address addr) { return contentContains(addr); }
166 public boolean isFrameCompleteAt(Address a) { return codeContains(a) && a.minus(codeBegin()) >= frameCompleteOffsetField.getValue(addr); }
167
168 // Reclamation support (really only used by the nmethods, but in order to get asserts to work
169 // in the CodeCache they are defined virtual here)
170 public boolean isZombie() { return false; }
171 public boolean isLockedByVM() { return false; }
172
173 /** OopMap for frame; can return null if none available */
174 public ImmutableOopMapSet getOopMaps() {
175 Address oopMapsAddr = oopMapsField.getValue(addr);
176 if (oopMapsAddr == null) {
177 return null;
178 }
179 return new ImmutableOopMapSet(oopMapsAddr);
180 }
181 // FIXME: not yet implementable
182 // void set_oop_maps(ImmutableOopMapSet* p);
183
184 public ImmutableOopMap getOopMapForReturnAddress(Address returnAddress, boolean debugging) {
185 Address pc = returnAddress;
186 if (Assert.ASSERTS_ENABLED) {
187 Assert.that(getOopMaps() != null, "nope");
188 }
189 return getOopMaps().findMapAtOffset(pc.minus(codeBegin()), debugging);
190 }
191
192 // virtual void preserve_callee_argument_oops(frame fr, const RegisterMap* reg_map, void f(oop*)) { ShouldNotReachHere(); }
193 // FIXME;
194
195 /** NOTE: this returns a size in BYTES in this system! */
196 public long getFrameSize() {
197 return VM.getVM().getAddressSize() * frameSizeField.getValue(addr);
198 }
199
200 // Returns true, if the next frame is responsible for GC'ing oops passed as arguments
201 public boolean callerMustGCArguments() { return false; }
202
203 public String getName() {
204 return CStringUtilities.getString(nameField.getValue(addr));
205 }
206
207 // FIXME: NOT FINISHED
208
209 // FIXME: add more accessors
210
211 public void print() {
212 printOn(System.out);
213 }
214
215 public void printOn(PrintStream tty) {
216 tty.print(getName());
217 printComponentsOn(tty);
218 }
219
220 protected void printComponentsOn(PrintStream tty) {
221 tty.println(" content: [" + contentBegin() + ", " + contentEnd() + "), " +
222 " code: [" + codeBegin() + ", " + codeEnd() + "), " +
223 " data: [" + dataBegin() + ", " + dataEnd() + "), " +
224 " frame size: " + getFrameSize());
225 }
226 }