cddl/contrib/dtracetoolkit/Examples/j_calls_example.txt

   1 The following are examples of running the j_calls.d script.
   2
   3 This traces activity from all Java processes on the system with hotspot
   4 provider support (1.6.0). Method calls and object allocation are only visible
   5 when using the flag "+ExtendedDTraceProbes". eg,
   6 java -XX:+ExtendedDTraceProbes classfile
   7
   8 Here we see it running on Code/Java/Func_abc
   9
  10 # j_calls.d
  11 Tracing... Hit Ctrl-C to end.
  12 ^C
  13
  14     PID TYPE     NAME                                                    COUNT
  15  311334 cload    Func_abc                                                    1
  16  311334 cload    java/io/BufferedInputStream                                 1
  17  311334 cload    java/io/BufferedOutputStream                                1
  18  311334 cload    java/io/BufferedReader                                      1
  19  311334 cload    java/io/BufferedWriter                                      1
  20  311334 cload    java/io/Closeable                                           1
  21  311334 cload    java/io/Console                                             1
  22  311334 cload    java/io/Console$1                                           1
  23  311334 cload    java/io/Console$1$1                                         1
  24  311334 cload    java/io/DataInput                                           1
  25  311334 cload    java/io/DataInputStream                                     1
  26  311334 cload    java/io/DeleteOnExitHook                                    1
  27  311334 cload    java/io/ExpiringCache                                       1
  28  311334 cload    java/io/ExpiringCache$1                                     1
  29  311334 cload    java/io/ExpiringCache$Entry                                 1
  30  311334 cload    java/io/File                                                1
  31  311334 cload    java/io/File$1                                              1
  32  311334 cload    java/io/FileDescriptor                                      1
  33  311334 cload    java/io/FileInputStream                                     1
  34  311334 cload    java/io/FileOutputStream                                    1
  35  311334 cload    java/io/FilePermission                                      1
  36  311334 cload    java/io/FilePermission$1                                    1
  37  311334 cload    java/io/FilePermissionCollection                            1
  38  311334 cload    java/io/FileReader                                          1
  39  311334 cload    java/io/FileSystem                                          1
  40  311334 cload    java/io/FilterInputStream                                   1
  41  311334 cload    java/io/FilterOutputStream                                  1
  42  311334 cload    java/io/Flushable                                           1
  43  311334 cload    java/io/InputStream                                         1
  44  311334 cload    java/io/InputStreamReader                                   1
  45  311334 cload    java/io/ObjectStreamClass                                   1
  46  311334 cload    java/io/ObjectStreamField                                   1
  47  311334 cload    java/io/OutputStream                                        1
  48  311334 cload    java/io/OutputStreamWriter                                  1
  49  311334 cload    java/io/PrintStream                                         1
  50  311334 cload    java/io/Reader                                              1
  51  311334 cload    java/io/Serializable                                        1
  52  311334 cload    java/io/UnixFileSystem                                      1
  53  311334 cload    java/io/Writer                                              1
  54  311334 cload    java/lang/AbstractStringBuilder                             1
  55  311334 cload    java/lang/Appendable                                        1
  56  311334 cload    java/lang/ApplicationShutdownHooks                          1
  57  311334 cload    java/lang/ArithmeticException                               1
  58  311334 cload    java/lang/ArrayStoreException                               1
  59  311334 cload    java/lang/Boolean                                           1
  60  311334 cload    java/lang/Byte                                              1
  61  311334 cload    java/lang/CharSequence                                      1
  62  311334 cload    java/lang/Character                                         1
  63  311334 cload    java/lang/CharacterDataLatin1                               1
  64  311334 cload    java/lang/Class                                             1
  65 [... 1400 lines truncated ...]
  66  311334 method   java/lang/Class.getClassLoader0                            34
  67  311334 method   java/lang/String.toLowerCase                               34
  68  311334 method   sun/security/action/GetPropertyAction.run                  34
  69  311334 method   java/nio/CharBuffer.arrayOffset                            36
  70  311334 method   java/util/HashMap.getEntry                                 36
  71  311334 method   java/io/File.<init>                                        37
  72  311334 method   java/io/UnixFileSystem.prefixLength                        37
  73  311334 oalloc   java/io/File                                               37
  74  311334 oalloc   java/lang/reflect/Field                                    37
  75  311334 method   java/io/BufferedReader.readLine                            38
  76  311334 method   java/util/concurrent/locks/AbstractOwnableSynchronizer.setExclusiveOwnerThread       38
  77  311334 method   java/lang/CharacterDataLatin1.toLowerCase                  41
  78  311334 method   java/lang/CharacterDataLatin1.getProperties                43
  79  311334 method   java/security/AccessController.doPrivileged                43
  80  311334 method   java/util/Vector.size                                      43
  81  311334 method   java/nio/Buffer.position                                   44
  82  311334 method   java/nio/ByteBuffer.arrayOffset                            44
  83  311334 method   java/lang/System.getProperty                               48
  84  311334 method   java/util/Properties.getProperty                           50
  85  311334 method   java/util/BitSet.expandTo                                  51
  86  311334 method   java/util/BitSet.set                                       51
  87  311334 method   java/lang/System.checkKey                                  56
  88  311334 method   java/lang/Thread.currentThread                             57
  89  311334 method   java/util/Hashtable$Entry.<init>                           57
  90  311334 oalloc   [Ljava/lang/String;                                        57
  91  311334 oalloc   java/util/Hashtable$Entry                                  57
  92  311334 method   java/util/Hashtable.get                                    59
  93  311334 method   java/util/Hashtable.put                                    63
  94  311334 method   java/util/BitSet.checkInvariants                           71
  95  311334 method   java/util/BitSet.wordIndex                                 72
  96  311334 method   java/lang/StringBuilder.<init>                             73
  97  311334 method   java/lang/StringBuilder.toString                           73
  98  311334 oalloc   java/lang/StringBuilder                                    73
  99  311334 method   java/lang/AbstractStringBuilder.expandCapacity             81
 100  311334 method   java/util/HashMap.hash                                     81
 101  311334 method   java/util/HashMap.indexFor                                 81
 102  311334 method   java/lang/AbstractStringBuilder.<init>                     82
 103  311334 method   java/lang/Character.toLowerCase                            82
 104  311334 method   java/lang/String.startsWith                                83
 105  311334 method   java/util/Arrays.copyOf                                    87
 106  311334 method   java/lang/String.lastIndexOf                               90
 107  311334 method   java/lang/String.substring                                 94
 108  311334 method   java/util/Arrays.copyOfRange                              107
 109  311334 method   java/lang/String.getChars                                 156
 110  311334 method   java/lang/System.getSecurityManager                       174
 111  311334 method   java/lang/String.<init>                                   175
 112  311334 method   java/lang/String.equals                                   202
 113  311334 method   java/lang/Math.min                                        208
 114  311334 method   java/lang/String.hashCode                                 213
 115  311334 method   java/lang/String.indexOf                                  302
 116  311334 oalloc   [Ljava/lang/Object;                                       326
 117  311334 method   java/lang/System.arraycopy                                360
 118  311334 oalloc   [I                                                        374
 119  311334 oalloc   java/lang/Class                                           395
 120  311334 oalloc   [B                                                        406
 121  311334 oalloc   [S                                                        486
 122  311334 method   java/lang/StringBuilder.append                            533
 123  311334 oalloc   [[I                                                       541
 124  311334 method   java/lang/AbstractStringBuilder.append                    549
 125  311334 method   java/lang/Object.<init>                                   823
 126  311334 oalloc   java/lang/String                                          931
 127  311334 oalloc   [C                                                       1076
 128  311334 method   java/lang/String.charAt                                  1960
 129
 130 This shows us each of the events associated with the PID 311334, and the
 131 number of times each event happened.  These events can be of type cload (class
 132 load), method (method call), mcompile (method compile), mload (compiled method
 133 load), oalloc (object alloc) or thread (thread start).
 134
 135 In this case you can see 1960 calls to java/lang/String.charAt, and 1076
 136 object allocations of type [C.
 137