21 * have any questions.
22 *
23 */
24
25 package sun.jvm.hotspot.runtime;
26
27 import java.util.*;
28 import sun.jvm.hotspot.debugger.*;
29 import sun.jvm.hotspot.types.*;
30
31 public class Thread extends VMObject {
32 private static long tlabFieldOffset;
33
34 private static CIntegerField suspendFlagsField;
35 // Thread::SuspendFlags enum constants
36 private static int EXTERNAL_SUSPEND;
37 private static int EXT_SUSPENDED;
38 private static int HAS_ASYNC_EXCEPTION;
39
40 private static AddressField activeHandlesField;
41 private static AddressField highestLockField;
42 private static AddressField currentPendingMonitorField;
43 private static AddressField currentWaitingMonitorField;
44
45 static {
46 VM.registerVMInitializedObserver(new Observer() {
47 public void update(Observable o, Object data) {
48 initialize(VM.getVM().getTypeDataBase());
49 }
50 });
51 }
52
53 private static synchronized void initialize(TypeDataBase db) {
54 Type type = db.lookupType("Thread");
55
56 suspendFlagsField = type.getCIntegerField("_suspend_flags");
57 EXTERNAL_SUSPEND = db.lookupIntConstant("Thread::_external_suspend").intValue();
58 EXT_SUSPENDED = db.lookupIntConstant("Thread::_ext_suspended").intValue();
59 HAS_ASYNC_EXCEPTION = db.lookupIntConstant("Thread::_has_async_exception").intValue();
60
61 tlabFieldOffset = type.getField("_tlab").getOffset();
62 activeHandlesField = type.getAddressField("_active_handles");
63 highestLockField = type.getAddressField("_highest_lock");
64 currentPendingMonitorField = type.getAddressField("_current_pending_monitor");
65 currentWaitingMonitorField = type.getAddressField("_current_waiting_monitor");
66 }
67
68 public Thread(Address addr) {
69 super(addr);
70 }
71
72 public int suspendFlags() {
73 return (int) suspendFlagsField.getValue(addr);
74 }
75
76 public boolean isExternalSuspend() {
77 return (suspendFlags() & EXTERNAL_SUSPEND) != 0;
78 }
79
80 public boolean isExtSuspended() {
81 return (suspendFlags() & EXT_SUSPENDED) != 0;
82 }
83
104 return null;
105 }
106 return new JNIHandleBlock(a);
107 }
108
109 public boolean isVMThread() { return false; }
110 public boolean isJavaThread() { return false; }
111 public boolean isCompilerThread() { return false; }
112 public boolean isHiddenFromExternalView() { return false; }
113 public boolean isJvmtiAgentThread() { return false; }
114 public boolean isWatcherThread() { return false; }
115 public boolean isConcurrentMarkSweepThread() { return false; }
116 public boolean isLowMemoryDetectorThread() { return false; }
117
118 /** Memory operations */
119 public void oopsDo(AddressVisitor oopVisitor) {
120 // FIXME: Empty for now; will later traverse JNI handles and
121 // pending exception
122 }
123
124 public Address highestLock() {
125 return highestLockField.getValue(addr);
126 }
127
128 public ObjectMonitor getCurrentPendingMonitor() {
129 Address monitorAddr = currentPendingMonitorField.getValue(addr);
130 if (monitorAddr == null) {
131 return null;
132 }
133 return new ObjectMonitor(monitorAddr);
134 }
135
136 public ObjectMonitor getCurrentWaitingMonitor() {
137 Address monitorAddr = currentWaitingMonitorField.getValue(addr);
138 if (monitorAddr == null) {
139 return null;
140 }
141 return new ObjectMonitor(monitorAddr);
142 }
143
144 public boolean isLockOwned(Address lock) {
145 if (isInStack(lock)) return true;
146 return false;
147 }
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21 * have any questions.
22 *
23 */
24
25 package sun.jvm.hotspot.runtime;
26
27 import java.util.*;
28 import sun.jvm.hotspot.debugger.*;
29 import sun.jvm.hotspot.types.*;
30
31 public class Thread extends VMObject {
32 private static long tlabFieldOffset;
33
34 private static CIntegerField suspendFlagsField;
35 // Thread::SuspendFlags enum constants
36 private static int EXTERNAL_SUSPEND;
37 private static int EXT_SUSPENDED;
38 private static int HAS_ASYNC_EXCEPTION;
39
40 private static AddressField activeHandlesField;
41 private static AddressField currentPendingMonitorField;
42 private static AddressField currentWaitingMonitorField;
43
44 static {
45 VM.registerVMInitializedObserver(new Observer() {
46 public void update(Observable o, Object data) {
47 initialize(VM.getVM().getTypeDataBase());
48 }
49 });
50 }
51
52 private static synchronized void initialize(TypeDataBase db) {
53 Type type = db.lookupType("Thread");
54
55 suspendFlagsField = type.getCIntegerField("_suspend_flags");
56 EXTERNAL_SUSPEND = db.lookupIntConstant("Thread::_external_suspend").intValue();
57 EXT_SUSPENDED = db.lookupIntConstant("Thread::_ext_suspended").intValue();
58 HAS_ASYNC_EXCEPTION = db.lookupIntConstant("Thread::_has_async_exception").intValue();
59
60 tlabFieldOffset = type.getField("_tlab").getOffset();
61 activeHandlesField = type.getAddressField("_active_handles");
62 currentPendingMonitorField = type.getAddressField("_current_pending_monitor");
63 currentWaitingMonitorField = type.getAddressField("_current_waiting_monitor");
64 }
65
66 public Thread(Address addr) {
67 super(addr);
68 }
69
70 public int suspendFlags() {
71 return (int) suspendFlagsField.getValue(addr);
72 }
73
74 public boolean isExternalSuspend() {
75 return (suspendFlags() & EXTERNAL_SUSPEND) != 0;
76 }
77
78 public boolean isExtSuspended() {
79 return (suspendFlags() & EXT_SUSPENDED) != 0;
80 }
81
102 return null;
103 }
104 return new JNIHandleBlock(a);
105 }
106
107 public boolean isVMThread() { return false; }
108 public boolean isJavaThread() { return false; }
109 public boolean isCompilerThread() { return false; }
110 public boolean isHiddenFromExternalView() { return false; }
111 public boolean isJvmtiAgentThread() { return false; }
112 public boolean isWatcherThread() { return false; }
113 public boolean isConcurrentMarkSweepThread() { return false; }
114 public boolean isLowMemoryDetectorThread() { return false; }
115
116 /** Memory operations */
117 public void oopsDo(AddressVisitor oopVisitor) {
118 // FIXME: Empty for now; will later traverse JNI handles and
119 // pending exception
120 }
121
122 public ObjectMonitor getCurrentPendingMonitor() {
123 Address monitorAddr = currentPendingMonitorField.getValue(addr);
124 if (monitorAddr == null) {
125 return null;
126 }
127 return new ObjectMonitor(monitorAddr);
128 }
129
130 public ObjectMonitor getCurrentWaitingMonitor() {
131 Address monitorAddr = currentWaitingMonitorField.getValue(addr);
132 if (monitorAddr == null) {
133 return null;
134 }
135 return new ObjectMonitor(monitorAddr);
136 }
137
138 public boolean isLockOwned(Address lock) {
139 if (isInStack(lock)) return true;
140 return false;
141 }
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