32 import sun.jvm.hotspot.types.*;
33 import sun.jvm.hotspot.utilities.Observable;
34 import sun.jvm.hotspot.utilities.Observer;
35
36 public class Klass extends Metadata implements ClassConstants {
37 static {
38 VM.registerVMInitializedObserver(new Observer() {
39 public void update(Observable o, Object data) {
40 initialize(VM.getVM().getTypeDataBase());
41 }
42 });
43 }
44
45 // anon-enum constants for _layout_helper.
46 public static int LH_INSTANCE_SLOW_PATH_BIT;
47 public static int LH_LOG2_ELEMENT_SIZE_SHIFT;
48 public static int LH_ELEMENT_TYPE_SHIFT;
49 public static int LH_HEADER_SIZE_SHIFT;
50 public static int LH_ARRAY_TAG_SHIFT;
51 public static int LH_ARRAY_TAG_TYPE_VALUE;
52 public static int LH_ARRAY_TAG_OBJ_VALUE;
53
54 private static synchronized void initialize(TypeDataBase db) throws WrongTypeException {
55 Type type = db.lookupType("Klass");
56 javaMirrorFieldOffset = type.getField("_java_mirror").getOffset();
57 superField = new MetadataField(type.getAddressField("_super"), 0);
58 layoutHelper = new IntField(type.getJIntField("_layout_helper"), 0);
59 name = type.getAddressField("_name");
60 try {
61 traceIDField = type.getField("_trace_id");
62 } catch(Exception e) {
63 }
64 subklass = new MetadataField(type.getAddressField("_subklass"), 0);
65 nextSibling = new MetadataField(type.getAddressField("_next_sibling"), 0);
66 nextLink = new MetadataField(type.getAddressField("_next_link"), 0);
67 vtableLen = new CIntField(type.getCIntegerField("_vtable_len"), 0);
68 classLoaderData = type.getAddressField("_class_loader_data");
69
70 LH_INSTANCE_SLOW_PATH_BIT = db.lookupIntConstant("Klass::_lh_instance_slow_path_bit").intValue();
71 LH_LOG2_ELEMENT_SIZE_SHIFT = db.lookupIntConstant("Klass::_lh_log2_element_size_shift").intValue();
72 LH_ELEMENT_TYPE_SHIFT = db.lookupIntConstant("Klass::_lh_element_type_shift").intValue();
73 LH_HEADER_SIZE_SHIFT = db.lookupIntConstant("Klass::_lh_header_size_shift").intValue();
74 LH_ARRAY_TAG_SHIFT = db.lookupIntConstant("Klass::_lh_array_tag_shift").intValue();
75 LH_ARRAY_TAG_TYPE_VALUE = db.lookupIntConstant("Klass::_lh_array_tag_type_value").intValue();
76 LH_ARRAY_TAG_OBJ_VALUE = db.lookupIntConstant("Klass::_lh_array_tag_obj_value").intValue();
77 }
78
79
80 public Klass(Address addr) {
81 super(addr);
82 }
83
84 // jvmdi support - see also class_status in VM code
85 public int getClassStatus() {
86 return 0; // overridden in derived classes
87 }
88
89 public boolean isKlass() { return true; }
90 public boolean isArrayKlass() { return false; }
91
92 // Fields
93 private static long javaMirrorFieldOffset;
94 private static MetadataField superField;
95 private static IntField layoutHelper;
96 private static AddressField name;
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32 import sun.jvm.hotspot.types.*;
33 import sun.jvm.hotspot.utilities.Observable;
34 import sun.jvm.hotspot.utilities.Observer;
35
36 public class Klass extends Metadata implements ClassConstants {
37 static {
38 VM.registerVMInitializedObserver(new Observer() {
39 public void update(Observable o, Object data) {
40 initialize(VM.getVM().getTypeDataBase());
41 }
42 });
43 }
44
45 // anon-enum constants for _layout_helper.
46 public static int LH_INSTANCE_SLOW_PATH_BIT;
47 public static int LH_LOG2_ELEMENT_SIZE_SHIFT;
48 public static int LH_ELEMENT_TYPE_SHIFT;
49 public static int LH_HEADER_SIZE_SHIFT;
50 public static int LH_ARRAY_TAG_SHIFT;
51 public static int LH_ARRAY_TAG_TYPE_VALUE;
52
53
54 private static synchronized void initialize(TypeDataBase db) throws WrongTypeException {
55 Type type = db.lookupType("Klass");
56 javaMirrorFieldOffset = type.getField("_java_mirror").getOffset();
57 superField = new MetadataField(type.getAddressField("_super"), 0);
58 layoutHelper = new IntField(type.getJIntField("_layout_helper"), 0);
59 name = type.getAddressField("_name");
60 try {
61 traceIDField = type.getField("_trace_id");
62 } catch(Exception e) {
63 }
64 subklass = new MetadataField(type.getAddressField("_subklass"), 0);
65 nextSibling = new MetadataField(type.getAddressField("_next_sibling"), 0);
66 nextLink = new MetadataField(type.getAddressField("_next_link"), 0);
67 vtableLen = new CIntField(type.getCIntegerField("_vtable_len"), 0);
68 classLoaderData = type.getAddressField("_class_loader_data");
69
70 LH_INSTANCE_SLOW_PATH_BIT = db.lookupIntConstant("Klass::_lh_instance_slow_path_bit").intValue();
71 LH_LOG2_ELEMENT_SIZE_SHIFT = db.lookupIntConstant("Klass::_lh_log2_element_size_shift").intValue();
72 LH_ELEMENT_TYPE_SHIFT = db.lookupIntConstant("Klass::_lh_element_type_shift").intValue();
73 LH_HEADER_SIZE_SHIFT = db.lookupIntConstant("Klass::_lh_header_size_shift").intValue();
74 LH_ARRAY_TAG_SHIFT = db.lookupIntConstant("Klass::_lh_array_tag_shift").intValue();
75 LH_ARRAY_TAG_TYPE_VALUE = db.lookupIntConstant("Klass::_lh_array_tag_type_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 public boolean isArrayKlass() { return false; }
90
91 // Fields
92 private static long javaMirrorFieldOffset;
93 private static MetadataField superField;
94 private static IntField layoutHelper;
95 private static AddressField name;
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