29 import sun.jvm.hotspot.runtime.*;
30 import sun.jvm.hotspot.types.*;
31 import sun.jvm.hotspot.utilities.Observable;
32 import sun.jvm.hotspot.utilities.Observer;
33
34 // Oop represents the superclass for all types of
35 // objects in the HotSpot object heap.
36
37 public class Oop {
38 static {
39 VM.registerVMInitializedObserver(new Observer() {
40 public void update(Observable o, Object data) {
41 initialize(VM.getVM().getTypeDataBase());
42 }
43 });
44 }
45
46 private static synchronized void initialize(TypeDataBase db) throws WrongTypeException {
47 Type type = db.lookupType("oopDesc");
48 mark = new CIntField(type.getCIntegerField("_mark"), 0);
49 klass = new MetadataField(type.getAddressField("_metadata._klass"), 0);
50 compressedKlass = new NarrowKlassField(type.getAddressField("_metadata._compressed_klass"), 0);
51 headerSize = type.getSize();
52 }
53
54 private OopHandle handle;
55 private ObjectHeap heap;
56
57 Oop(OopHandle handle, ObjectHeap heap) {
58 this.handle = handle;
59 this.heap = heap;
60 }
61
62 ObjectHeap getHeap() { return heap; }
63
64 /** Should not be used or needed by most clients outside this
65 package; is needed, however, by {@link
66 sun.jvm.hotspot.utilities.MarkBits}. */
67 public OopHandle getHandle() { return handle; }
68
69 private static long headerSize;
70 public static long getHeaderSize() { return headerSize; } // Header size in bytes.
71
72 private static CIntField mark;
73 private static MetadataField klass;
74 private static NarrowKlassField compressedKlass;
75
76 // Accessors for declared fields
77 public Mark getMark() { return new Mark(getHandle()); }
78 public Klass getKlass() {
79 if (VM.getVM().isCompressedKlassPointersEnabled()) {
80 return (Klass)compressedKlass.getValue(getHandle());
81 } else {
82 return (Klass)klass.getValue(getHandle());
83 }
84 }
85
86 public boolean isA(Klass k) {
87 return getKlass().isSubtypeOf(k);
88 }
89
90 // Returns the byte size of this object
91 public long getObjectSize() {
92 Klass k = getKlass();
93 // All other types should be overriding getObjectSize directly
94 return ((InstanceKlass)k).getObjectSize(this);
95 }
96
97 // Type test operations
98 public boolean isInstance() { return false; }
99 public boolean isInstanceRef() { return false; }
130 return (int) mark.hash();
131 } else {
132 return slowIdentityHash();
133 }
134 }
135
136 public long slowIdentityHash() {
137 return VM.getVM().getObjectSynchronizer().identityHashValueFor(this);
138 }
139
140 public void iterate(OopVisitor visitor, boolean doVMFields) {
141 visitor.setObj(this);
142 visitor.prologue();
143 iterateFields(visitor, doVMFields);
144 visitor.epilogue();
145 }
146
147 void iterateFields(OopVisitor visitor, boolean doVMFields) {
148 if (doVMFields) {
149 visitor.doCInt(mark, true);
150 if (VM.getVM().isCompressedKlassPointersEnabled()) {
151 visitor.doMetadata(compressedKlass, true);
152 } else {
153 visitor.doMetadata(klass, true);
154 }
155 }
156 }
157
158 public void print() { printOn(System.out); }
159 public void printValue() { printValueOn(System.out); }
160 public void printRaw() { printRawOn(System.out); }
161
162 public static void printOopValueOn(Oop obj, PrintStream tty) {
163 if (obj == null) {
164 tty.print("null");
165 } else {
166 obj.printValueOn(tty);
167 tty.print(" @ " + VM.getVM().getUniverse().heap().oopAddressDescription(obj.getHandle()));
168 }
169 }
170
171 public static void printOopAddressOn(Oop obj, PrintStream tty) {
172 if (obj == null) {
173 tty.print("null");
189 }
190 }
191
192 public void printRawOn(PrintStream tty) {
193 tty.print("Dumping raw memory for ");
194 printValueOn(tty);
195 tty.println();
196 long size = getObjectSize() * 4;
197 for (long i = 0; i < size; i += 4) {
198 long memVal = getHandle().getCIntegerAt(i, 4, true);
199 tty.println(Long.toHexString(memVal));
200 }
201 }
202
203 public boolean verify() { return true;}
204
205 public static Klass getKlassForOopHandle(OopHandle handle) {
206 if (handle == null) {
207 return null;
208 }
209 if (VM.getVM().isCompressedKlassPointersEnabled()) {
210 return (Klass)Metadata.instantiateWrapperFor(handle.getCompKlassAddressAt(compressedKlass.getOffset()));
211 } else {
212 return (Klass)Metadata.instantiateWrapperFor(handle.getAddressAt(klass.getOffset()));
213 }
214 }
215 };
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29 import sun.jvm.hotspot.runtime.*;
30 import sun.jvm.hotspot.types.*;
31 import sun.jvm.hotspot.utilities.Observable;
32 import sun.jvm.hotspot.utilities.Observer;
33
34 // Oop represents the superclass for all types of
35 // objects in the HotSpot object heap.
36
37 public class Oop {
38 static {
39 VM.registerVMInitializedObserver(new Observer() {
40 public void update(Observable o, Object data) {
41 initialize(VM.getVM().getTypeDataBase());
42 }
43 });
44 }
45
46 private static synchronized void initialize(TypeDataBase db) throws WrongTypeException {
47 Type type = db.lookupType("oopDesc");
48 mark = new CIntField(type.getCIntegerField("_mark"), 0);
49 if (VM.getVM().isCompactObjectHeadersEnabled()) {
50 Type markType = db.lookupType("markWord");
51 headerSize = markType.getSize();
52 } else {
53 headerSize = type.getSize();
54 klass = new MetadataField(type.getAddressField("_metadata._klass"), 0);
55 compressedKlass = new NarrowKlassField(type.getAddressField("_metadata._compressed_klass"), 0);
56 }
57 }
58
59 private OopHandle handle;
60 private ObjectHeap heap;
61
62 Oop(OopHandle handle, ObjectHeap heap) {
63 this.handle = handle;
64 this.heap = heap;
65 }
66
67 ObjectHeap getHeap() { return heap; }
68
69 /** Should not be used or needed by most clients outside this
70 package; is needed, however, by {@link
71 sun.jvm.hotspot.utilities.MarkBits}. */
72 public OopHandle getHandle() { return handle; }
73
74 private static long headerSize;
75 public static long getHeaderSize() { return headerSize; } // Header size in bytes.
76
77 private static CIntField mark;
78 private static MetadataField klass;
79 private static NarrowKlassField compressedKlass;
80
81 // Accessors for declared fields
82 public Mark getMark() { return new Mark(getHandle()); }
83
84 private static Klass getKlass(Mark mark) {
85 assert(VM.getVM().isCompactObjectHeadersEnabled());
86 return mark.getKlass();
87 }
88
89 public Klass getKlass() {
90 if (VM.getVM().isCompactObjectHeadersEnabled()) {
91 assert(VM.getVM().isCompressedKlassPointersEnabled());
92 return getKlass(getMark());
93 } else if (VM.getVM().isCompressedKlassPointersEnabled()) {
94 return (Klass)compressedKlass.getValue(getHandle());
95 } else {
96 return (Klass)klass.getValue(getHandle());
97 }
98 }
99
100 public boolean isA(Klass k) {
101 return getKlass().isSubtypeOf(k);
102 }
103
104 // Returns the byte size of this object
105 public long getObjectSize() {
106 Klass k = getKlass();
107 // All other types should be overriding getObjectSize directly
108 return ((InstanceKlass)k).getObjectSize(this);
109 }
110
111 // Type test operations
112 public boolean isInstance() { return false; }
113 public boolean isInstanceRef() { return false; }
144 return (int) mark.hash();
145 } else {
146 return slowIdentityHash();
147 }
148 }
149
150 public long slowIdentityHash() {
151 return VM.getVM().getObjectSynchronizer().identityHashValueFor(this);
152 }
153
154 public void iterate(OopVisitor visitor, boolean doVMFields) {
155 visitor.setObj(this);
156 visitor.prologue();
157 iterateFields(visitor, doVMFields);
158 visitor.epilogue();
159 }
160
161 void iterateFields(OopVisitor visitor, boolean doVMFields) {
162 if (doVMFields) {
163 visitor.doCInt(mark, true);
164 if (!VM.getVM().isCompactObjectHeadersEnabled()) {
165 if (VM.getVM().isCompressedKlassPointersEnabled()) {
166 visitor.doMetadata(compressedKlass, true);
167 } else {
168 visitor.doMetadata(klass, true);
169 }
170 }
171 }
172 }
173
174 public void print() { printOn(System.out); }
175 public void printValue() { printValueOn(System.out); }
176 public void printRaw() { printRawOn(System.out); }
177
178 public static void printOopValueOn(Oop obj, PrintStream tty) {
179 if (obj == null) {
180 tty.print("null");
181 } else {
182 obj.printValueOn(tty);
183 tty.print(" @ " + VM.getVM().getUniverse().heap().oopAddressDescription(obj.getHandle()));
184 }
185 }
186
187 public static void printOopAddressOn(Oop obj, PrintStream tty) {
188 if (obj == null) {
189 tty.print("null");
205 }
206 }
207
208 public void printRawOn(PrintStream tty) {
209 tty.print("Dumping raw memory for ");
210 printValueOn(tty);
211 tty.println();
212 long size = getObjectSize() * 4;
213 for (long i = 0; i < size; i += 4) {
214 long memVal = getHandle().getCIntegerAt(i, 4, true);
215 tty.println(Long.toHexString(memVal));
216 }
217 }
218
219 public boolean verify() { return true;}
220
221 public static Klass getKlassForOopHandle(OopHandle handle) {
222 if (handle == null) {
223 return null;
224 }
225 if (VM.getVM().isCompactObjectHeadersEnabled()) {
226 Mark mark = new Mark(handle);
227 return getKlass(mark);
228 } else if (VM.getVM().isCompressedKlassPointersEnabled()) {
229 return (Klass)Metadata.instantiateWrapperFor(handle.getCompKlassAddressAt(compressedKlass.getOffset()));
230 } else {
231 return (Klass)Metadata.instantiateWrapperFor(handle.getAddressAt(klass.getOffset()));
232 }
233 }
234 };
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