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.oops;
26
27 import java.io.*;
28 import java.util.*;
29 import sun.jvm.hotspot.debugger.*;
30 import sun.jvm.hotspot.runtime.*;
31 import sun.jvm.hotspot.types.*;
32
33 public class Klass extends Metadata implements ClassConstants {
34 static {
35 VM.registerVMInitializedObserver(new Observer() {
36 public void update(Observable o, Object data) {
37 initialize(VM.getVM().getTypeDataBase());
38 }
39 });
40 }
41
42 // anon-enum constants for _layout_helper.
43 public static int LH_INSTANCE_SLOW_PATH_BIT;
44 public static int LH_LOG2_ELEMENT_SIZE_SHIFT;
45 public static int LH_ELEMENT_TYPE_SHIFT;
46 public static int LH_HEADER_SIZE_SHIFT;
47 public static int LH_ARRAY_TAG_SHIFT;
48 public static int LH_ARRAY_TAG_TYPE_VALUE;
49 public static int LH_ARRAY_TAG_OBJ_VALUE;
50
51 private static synchronized void initialize(TypeDataBase db) throws WrongTypeException {
52 Type type = db.lookupType("Klass");
53 javaMirror = new OopField(type.getOopField("_java_mirror"), 0);
54 superField = new MetadataField(type.getAddressField("_super"), 0);
55 layoutHelper = new IntField(type.getJIntField("_layout_helper"), 0);
56 name = type.getAddressField("_name");
57 accessFlags = new CIntField(type.getCIntegerField("_access_flags"), 0);
58 try {
59 traceIDField = type.getField("_trace_id");
60 } catch(Exception e) {
61 }
62 subklass = new MetadataField(type.getAddressField("_subklass"), 0);
63 nextSibling = new MetadataField(type.getAddressField("_next_sibling"), 0);
64 nextLink = new MetadataField(type.getAddressField("_next_link"), 0);
65 vtableLen = new CIntField(type.getCIntegerField("_vtable_len"), 0);
66
67 LH_INSTANCE_SLOW_PATH_BIT = db.lookupIntConstant("Klass::_lh_instance_slow_path_bit").intValue();
68 LH_LOG2_ELEMENT_SIZE_SHIFT = db.lookupIntConstant("Klass::_lh_log2_element_size_shift").intValue();
69 LH_ELEMENT_TYPE_SHIFT = db.lookupIntConstant("Klass::_lh_element_type_shift").intValue();
70 LH_HEADER_SIZE_SHIFT = db.lookupIntConstant("Klass::_lh_header_size_shift").intValue();
71 LH_ARRAY_TAG_SHIFT = db.lookupIntConstant("Klass::_lh_array_tag_shift").intValue();
72 LH_ARRAY_TAG_TYPE_VALUE = db.lookupIntConstant("Klass::_lh_array_tag_type_value").intValue();
73 LH_ARRAY_TAG_OBJ_VALUE = db.lookupIntConstant("Klass::_lh_array_tag_obj_value").intValue();
74 }
75
76
77 public Klass(Address addr) {
78 super(addr);
79 }
80
81 // jvmdi support - see also class_status in VM code
82 public int getClassStatus() {
83 return 0; // overridden in derived classes
84 }
85
86 public boolean isKlass() { return true; }
87
88 // Fields
89 private static OopField javaMirror;
90 private static MetadataField superField;
91 private static IntField layoutHelper;
92 private static AddressField name;
93 private static CIntField accessFlags;
94 private static MetadataField subklass;
95 private static MetadataField nextSibling;
96 private static MetadataField nextLink;
97 private static sun.jvm.hotspot.types.Field traceIDField;
98 private static CIntField vtableLen;
99
100 private Address getValue(AddressField field) {
101 return addr.getAddressAt(field.getOffset());
102 }
103
104 protected Symbol getSymbol(AddressField field) {
105 return Symbol.create(addr.getAddressAt(field.getOffset()));
106 }
107
108 // Accessors for declared fields
109 public Instance getJavaMirror() { return (Instance) javaMirror.getValue(this); }
110 public Klass getSuper() { return (Klass) superField.getValue(this); }
111 public Klass getJavaSuper() { return null; }
112 public int getLayoutHelper() { return (int) layoutHelper.getValue(this); }
113 public Symbol getName() { return getSymbol(name); }
114 public long getAccessFlags() { return accessFlags.getValue(this); }
115 // Convenience routine
116 public AccessFlags getAccessFlagsObj(){ return new AccessFlags(getAccessFlags()); }
117 public Klass getSubklassKlass() { return (Klass) subklass.getValue(this); }
118 public Klass getNextSiblingKlass() { return (Klass) nextSibling.getValue(this); }
119 public Klass getNextLinkKlass() { return (Klass) nextLink.getValue(this); }
120 public long getVtableLen() { return vtableLen.getValue(this); }
121
122 public long traceID() {
123 if (traceIDField == null) return 0;
124 return traceIDField.getJLong(addr);
125 }
126
127 // computed access flags - takes care of inner classes etc.
128 // This is closer to actual source level than getAccessFlags() etc.
129 public long computeModifierFlags() {
130 return 0L; // Unless overridden, modifier_flags is 0.
131 }
132
133 // same as JVM_GetClassModifiers
134 public final long getClassModifiers() {
135 // unlike the VM counterpart we never have to deal with primitive type,
136 // because we operator on Klass and not an instance of java.lang.Class.
137 long flags = computeModifierFlags();
138 if (isSuper()) {
139 flags |= JVM_ACC_SUPER;
140 }
|
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.oops;
26
27 import java.io.*;
28 import java.util.*;
29 import sun.jvm.hotspot.debugger.*;
30 import sun.jvm.hotspot.classfile.*;
31 import sun.jvm.hotspot.runtime.*;
32 import sun.jvm.hotspot.types.*;
33
34 public class Klass extends Metadata implements ClassConstants {
35 static {
36 VM.registerVMInitializedObserver(new Observer() {
37 public void update(Observable o, Object data) {
38 initialize(VM.getVM().getTypeDataBase());
39 }
40 });
41 }
42
43 // anon-enum constants for _layout_helper.
44 public static int LH_INSTANCE_SLOW_PATH_BIT;
45 public static int LH_LOG2_ELEMENT_SIZE_SHIFT;
46 public static int LH_ELEMENT_TYPE_SHIFT;
47 public static int LH_HEADER_SIZE_SHIFT;
48 public static int LH_ARRAY_TAG_SHIFT;
49 public static int LH_ARRAY_TAG_TYPE_VALUE;
50 public static int LH_ARRAY_TAG_OBJ_VALUE;
51
52 private static synchronized void initialize(TypeDataBase db) throws WrongTypeException {
53 Type type = db.lookupType("Klass");
54 javaMirror = new OopField(type.getOopField("_java_mirror"), 0);
55 superField = new MetadataField(type.getAddressField("_super"), 0);
56 layoutHelper = new IntField(type.getJIntField("_layout_helper"), 0);
57 name = type.getAddressField("_name");
58 accessFlags = new CIntField(type.getCIntegerField("_access_flags"), 0);
59 try {
60 traceIDField = type.getField("_trace_id");
61 } catch(Exception e) {
62 }
63 subklass = new MetadataField(type.getAddressField("_subklass"), 0);
64 nextSibling = new MetadataField(type.getAddressField("_next_sibling"), 0);
65 nextLink = new MetadataField(type.getAddressField("_next_link"), 0);
66 vtableLen = new CIntField(type.getCIntegerField("_vtable_len"), 0);
67 classLoaderData = type.getAddressField("_class_loader_data");
68
69 LH_INSTANCE_SLOW_PATH_BIT = db.lookupIntConstant("Klass::_lh_instance_slow_path_bit").intValue();
70 LH_LOG2_ELEMENT_SIZE_SHIFT = db.lookupIntConstant("Klass::_lh_log2_element_size_shift").intValue();
71 LH_ELEMENT_TYPE_SHIFT = db.lookupIntConstant("Klass::_lh_element_type_shift").intValue();
72 LH_HEADER_SIZE_SHIFT = db.lookupIntConstant("Klass::_lh_header_size_shift").intValue();
73 LH_ARRAY_TAG_SHIFT = db.lookupIntConstant("Klass::_lh_array_tag_shift").intValue();
74 LH_ARRAY_TAG_TYPE_VALUE = db.lookupIntConstant("Klass::_lh_array_tag_type_value").intValue();
75 LH_ARRAY_TAG_OBJ_VALUE = db.lookupIntConstant("Klass::_lh_array_tag_obj_value").intValue();
76 }
77
78
79 public Klass(Address addr) {
80 super(addr);
81 }
82
83 // jvmdi support - see also class_status in VM code
84 public int getClassStatus() {
85 return 0; // overridden in derived classes
86 }
87
88 public boolean isKlass() { return true; }
89
90 // Fields
91 private static OopField javaMirror;
92 private static MetadataField superField;
93 private static IntField layoutHelper;
94 private static AddressField name;
95 private static CIntField accessFlags;
96 private static MetadataField subklass;
97 private static MetadataField nextSibling;
98 private static MetadataField nextLink;
99 private static sun.jvm.hotspot.types.Field traceIDField;
100 private static CIntField vtableLen;
101 private static AddressField classLoaderData;
102
103 private Address getValue(AddressField field) {
104 return addr.getAddressAt(field.getOffset());
105 }
106
107 protected Symbol getSymbol(AddressField field) {
108 return Symbol.create(addr.getAddressAt(field.getOffset()));
109 }
110
111 // Accessors for declared fields
112 public Instance getJavaMirror() { return (Instance) javaMirror.getValue(this); }
113 public Klass getSuper() { return (Klass) superField.getValue(this); }
114 public Klass getJavaSuper() { return null; }
115 public int getLayoutHelper() { return (int) layoutHelper.getValue(this); }
116 public Symbol getName() { return getSymbol(name); }
117 public long getAccessFlags() { return accessFlags.getValue(this); }
118 // Convenience routine
119 public AccessFlags getAccessFlagsObj(){ return new AccessFlags(getAccessFlags()); }
120 public Klass getSubklassKlass() { return (Klass) subklass.getValue(this); }
121 public Klass getNextSiblingKlass() { return (Klass) nextSibling.getValue(this); }
122 public Klass getNextLinkKlass() { return (Klass) nextLink.getValue(this); }
123 public long getVtableLen() { return vtableLen.getValue(this); }
124
125 public ClassLoaderData getClassLoaderData() { return ClassLoaderData.instantiateWrapperFor(classLoaderData.getValue(getAddress())); }
126 public Oop getClassLoader() { return getClassLoaderData().getClassLoader(); }
127
128 public long traceID() {
129 if (traceIDField == null) return 0;
130 return traceIDField.getJLong(addr);
131 }
132
133 // computed access flags - takes care of inner classes etc.
134 // This is closer to actual source level than getAccessFlags() etc.
135 public long computeModifierFlags() {
136 return 0L; // Unless overridden, modifier_flags is 0.
137 }
138
139 // same as JVM_GetClassModifiers
140 public final long getClassModifiers() {
141 // unlike the VM counterpart we never have to deal with primitive type,
142 // because we operator on Klass and not an instance of java.lang.Class.
143 long flags = computeModifierFlags();
144 if (isSuper()) {
145 flags |= JVM_ACC_SUPER;
146 }
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