1 The following are examples of j_events.d.
3 This counts events from all Java processes on the system with hotspot
4 provider support (1.6.0). Some events such as method calls are only visible
5 when using the flag "+ExtendedDTraceProbes". eg,
6 java -XX:+ExtendedDTraceProbes classfile
8 Here you can see it running while the program Code/Java/Func_abc
11 Tracing... Hit Ctrl-C to end.
15 311379 AttachCurrentThread-entry 1
16 311379 AttachCurrentThread-return 1
17 311379 CallIntMethod-entry 1
18 311379 CallIntMethod-return 1
19 311379 CallStaticBooleanMethod-entry 1
20 311379 CallStaticBooleanMethod-return 1
21 311379 CallStaticObjectMethod-entry 1
22 311379 CallStaticObjectMethod-return 1
23 311379 CallStaticObjectMethodV-entry 1
24 311379 CallStaticObjectMethodV-return 1
25 311379 CallStaticVoidMethod-entry 1
26 311379 CallStaticVoidMethod-return 1
27 311379 CreateJavaVM-entry 1
28 311379 CreateJavaVM-return 1
29 311379 DestroyJavaVM-entry 1
30 311379 DestroyJavaVM-return 1
31 311379 DetachCurrentThread-entry 1
32 311379 DetachCurrentThread-return 1
33 311379 ExceptionCheck-entry 1
34 311379 ExceptionCheck-return 1
35 311379 ExceptionClear-entry 1
36 311379 ExceptionClear-return 1
37 311379 GetDefaultJavaVMInitArgs-entry 1
38 311379 GetDefaultJavaVMInitArgs-return 1
39 311379 GetJavaVM-entry 1
40 311379 GetJavaVM-return 1
41 311379 GetStringRegion-entry 1
42 311379 GetStringRegion-return 1
43 311379 NewByteArray-entry 1
44 311379 NewByteArray-return 1
45 311379 NewObject-entry 1
46 311379 NewObject-return 1
47 311379 NewObjectV-entry 1
48 311379 NewObjectV-return 1
49 311379 SetBooleanField-entry 1
50 311379 SetBooleanField-return 1
51 311379 ToReflectedMethod-entry 1
52 311379 ToReflectedMethod-return 1
53 311379 vm-init-begin 1
56 311379 NewGlobalRef-entry 2
57 311379 NewGlobalRef-return 2
59 311379 GetStaticFieldID-entry 3
60 311379 GetStaticFieldID-return 3
61 311379 NewObjectArray-entry 3
62 311379 NewObjectArray-return 3
63 311379 SetStaticObjectField-entry 3
64 311379 SetStaticObjectField-return 3
65 311379 GetStaticMethodID-entry 4
66 311379 GetStaticMethodID-return 4
67 311379 EnsureLocalCapacity-entry 5
68 311379 EnsureLocalCapacity-return 5
69 311379 SetByteArrayRegion-entry 5
70 311379 SetByteArrayRegion-return 5
71 311379 SetLongField-entry 5
72 311379 SetLongField-return 5
73 311379 GetMethodID-entry 6
74 311379 GetMethodID-return 6
75 311379 GetObjectArrayElement-entry 6
76 311379 GetObjectArrayElement-return 6
77 311379 GetSuperclass-entry 6
78 311379 GetSuperclass-return 6
80 311379 SetIntField-entry 8
81 311379 SetIntField-return 8
82 311379 GetArrayLength-entry 9
83 311379 GetArrayLength-return 9
84 311379 GetByteArrayRegion-entry 9
85 311379 GetByteArrayRegion-return 9
86 311379 RegisterNatives-entry 9
87 311379 RegisterNatives-return 9
88 311379 GetObjectClass-entry 10
89 311379 GetObjectClass-return 10
90 311379 FindClass-entry 11
91 311379 FindClass-return 11
92 311379 SetObjectArrayElement-entry 12
93 311379 SetObjectArrayElement-return 12
94 311379 GetStringUTFLength-entry 18
95 311379 GetStringUTFLength-return 18
96 311379 GetStringUTFRegion-entry 18
97 311379 GetStringUTFRegion-return 18
98 311379 GetFieldID-entry 21
99 311379 GetFieldID-return 21
100 309790 CallStaticVoidMethod-entry 24
101 309790 CallStaticVoidMethod-return 24
102 194441 CallStaticVoidMethod-entry 26
103 194441 CallStaticVoidMethod-return 26
104 311379 GetStringUTFChars-entry 29
105 311379 GetStringUTFChars-return 29
106 311379 ReleaseStringUTFChars-entry 29
107 311379 ReleaseStringUTFChars-return 29
108 311379 CallObjectMethod-entry 30
109 311379 CallObjectMethod-return 30
110 311379 GetStringCritical-entry 35
111 311379 GetStringCritical-return 35
112 311379 ReleaseStringCritical-entry 35
113 311379 ReleaseStringCritical-return 35
114 311379 ExceptionOccurred-entry 46
115 311379 ExceptionOccurred-return 46
116 311379 GetStringLength-entry 54
117 311379 GetStringLength-return 54
118 311379 NewStringUTF-entry 54
119 311379 NewStringUTF-return 54
120 311379 NewString-entry 55
121 311379 NewString-return 55
122 311379 GetObjectField-entry 60
123 311379 GetObjectField-return 60
124 311379 DeleteLocalRef-entry 108
125 311379 DeleteLocalRef-return 108
126 311379 class-loaded 327
127 311379 object-alloc 5389
128 311379 method-return 12024
129 311379 method-entry 12031
131 You can see that nearly all of the events recorded are from PID 311379, which
132 we can assume in this case is the program in question. Not all of the lines
133 correspond to this, however, which is something to be aware of while analysing