cddl/contrib/dtracetoolkit/Examples/j_syscalls_example.txt

   1 The following are examples of j_syscalls.d.
   2
   3 This is a simple script to count executed Java methods and system calls.
   4 Here it traces an example program, Code/Java/Func_abc.
   5
   6 # j_syscalls.d -c 'java -XX:+ExtendedDTraceProbes Func_abc'
   7 Tracing... Hit Ctrl-C to end.
   8 Function A
   9 Function B
  10 Function C
  11     PID TYPE     NAME                                                    COUNT
  12  311536 method   Func_abc.func_a                                             1
  13  311536 method   Func_abc.func_b                                             1
  14  311536 method   Func_abc.func_c                                             1
  15  311536 method   Func_abc.main                                               1
  16  311536 method   java/io/BufferedInputStream.<clinit>                        1
  17  311536 method   java/io/BufferedReader.<clinit>                             1
  18  311536 method   java/io/BufferedReader.close                                1
  19  311536 method   java/io/BufferedWriter.<clinit>                             1
  20  311536 method   java/io/Console$1$1.<init>                                  1
  21  311536 method   java/io/Console$1$1.run                                     1
  22  311536 method   java/io/Console$1.<init>                                    1
  23  311536 method   java/io/Console$1.consoleRestoreHook                        1
  24  311536 method   java/io/Console.<clinit>                                    1
  25  311536 method   java/io/Console.access$600                                  1
  26  311536 method   java/io/DataInputStream.<init>                              1
  27  311536 method   java/io/DataInputStream.readFully                           1
  28  311536 method   java/io/DeleteOnExitHook.<clinit>                           1
  29  311536 method   java/io/DeleteOnExitHook.<init>                             1
  30  311536 method   java/io/DeleteOnExitHook.hook                               1
  31  311536 method   java/io/DeleteOnExitHook.run                                1
  32 [... 900 lines truncated ...]
  33  311536 method   java/io/ExpiringCache.get                                  18
  34  311536 method   java/lang/Class.desiredAssertionStatus                     18
  35  311536 method   java/lang/Class.desiredAssertionStatus0                    18
  36  311536 method   java/lang/ClassLoader.findLoadedClass                      18
  37  311536 method   java/lang/ClassLoader.findLoadedClass0                     18
  38  311536 method   java/io/BufferedReader.ensureOpen                          19
  39  311536 method   java/lang/System.currentTimeMillis                         19
  40  311536 method   java/nio/Buffer.limit                                      19
  41  311536 method   java/util/Locale.<init>                                    19
  42  311536 method   java/util/Locale.createSingleton                           19
  43  311536 method   java/util/concurrent/ConcurrentHashMap$Segment.put         19
  44  311536 method   java/util/concurrent/ConcurrentHashMap.put                 19
  45  311536 method   java/util/concurrent/locks/AbstractQueuedSynchronizer.compareAndSetState       19
  46  311536 method   java/util/concurrent/locks/AbstractQueuedSynchronizer.release       19
  47  311536 method   java/util/concurrent/locks/AbstractQueuedSynchronizer.setState       19
  48  311536 method   java/util/concurrent/locks/ReentrantLock$NonfairSync.lock       19
  49  311536 method   java/util/concurrent/locks/ReentrantLock$Sync.tryRelease       19
  50  311536 method   java/util/concurrent/locks/ReentrantLock.lock              19
  51  311536 method   java/util/concurrent/locks/ReentrantLock.unlock            19
  52  311536 method   java/io/ObjectStreamField.<init>                           20
  53  311536 method   java/nio/ByteBuffer.array                                  20
  54  311536 method   java/util/AbstractList.<init>                              20
  55  311536 method   java/util/BitSet.get                                       20
  56  311536 method   java/util/concurrent/ConcurrentHashMap.hash                20
  57  311536 method   java/util/concurrent/ConcurrentHashMap.segmentFor          20
  58  311536 method   sun/misc/VM.isBooted                                       20
  59  311536 syscall  memcntl                                                    20
  60  311536 method   java/io/File.getName                                       21
  61  311536 method   java/io/UnixFileSystem.getBooleanAttributes                21
  62  311536 method   java/io/UnixFileSystem.getBooleanAttributes0               21
  63  311536 method   java/lang/StringBuffer.append                              21
  64  311536 method   java/nio/charset/Charset.atBugLevel                        21
  65  311536 method   java/util/concurrent/ConcurrentHashMap$HashEntry.newArray       22
  66  311536 method   sun/misc/Unsafe.compareAndSwapInt                          22
  67  311536 method   java/util/HashMap.<init>                                   23
  68  311536 method   java/util/concurrent/ConcurrentHashMap$HashEntry.<init>       23
  69  311536 syscall  stat64                                                     23
  70  311536 method   java/nio/charset/CoderResult.isUnderflow                   24
  71  311536 method   java/util/AbstractMap.<init>                               24
  72  311536 method   java/util/Vector.elementAt                                 24
  73  311536 syscall  munmap                                                     24
  74  311536 method   java/lang/Class.getClassLoader                             25
  75  311536 syscall  lwp_sigmask                                                25
  76  311536 syscall  sigaction                                                  25
  77  311536 method   java/util/AbstractCollection.<init>                        26
  78  311536 method   java/util/ArrayList.add                                    26
  79  311536 method   java/util/ArrayList.ensureCapacity                         26
  80  311536 method   java/lang/ClassLoader.loadClass                            27
  81  311536 method   java/net/URL.<init>                                        27
  82  311536 method   java/lang/ClassLoader.check                                28
  83  311536 method   java/lang/ClassLoader.checkName                            28
  84  311536 method   java/lang/ref/Reference.<init>                             28
  85  311536 method   java/lang/String.endsWith                                  29
  86  311536 method   sun/misc/VM.allowArraySyntax                               29
  87  311536 method   java/io/ExpiringCache.entryFor                             30
  88  311536 method   java/io/UnixFileSystem.resolve                             30
  89  311536 method   java/util/HashMap$Entry.<init>                             30
  90  311536 method   java/util/LinkedHashMap.get                                30
  91  311536 syscall  priocntlsys                                                30
  92  311536 method   java/util/HashMap.put                                      33
  93  311536 method   java/util/Vector.<init>                                    33
  94  311536 method   java/io/UnixFileSystem.normalize                           34
  95  311536 method   java/lang/Class.getClassLoader0                            34
  96  311536 method   java/lang/String.toLowerCase                               34
  97  311536 method   sun/security/action/GetPropertyAction.run                  34
  98  311536 method   java/nio/CharBuffer.arrayOffset                            36
  99  311536 method   java/util/HashMap.getEntry                                 36
 100  311536 method   java/io/File.<init>                                        37
 101  311536 method   java/io/UnixFileSystem.prefixLength                        37
 102  311536 method   java/io/BufferedReader.readLine                            38
 103  311536 method   java/util/concurrent/locks/AbstractOwnableSynchronizer.setExclusiveOwnerThread       38
 104  311536 syscall  resolvepath                                                38
 105  311536 method   java/lang/CharacterDataLatin1.toLowerCase                  41
 106  311536 method   java/lang/CharacterDataLatin1.getProperties                43
 107  311536 method   java/security/AccessController.doPrivileged                43
 108  311536 method   java/util/Vector.size                                      43
 109  311536 method   java/nio/Buffer.position                                   44
 110  311536 method   java/nio/ByteBuffer.arrayOffset                            44
 111  311536 method   java/lang/System.getProperty                               48
 112  311536 method   java/util/Properties.getProperty                           50
 113  311536 method   java/util/BitSet.expandTo                                  51
 114  311536 method   java/util/BitSet.set                                       51
 115  311536 syscall  pollsys                                                    55
 116  311536 method   java/lang/System.checkKey                                  56
 117  311536 method   java/lang/Thread.currentThread                             57
 118  311536 method   java/util/Hashtable$Entry.<init>                           57
 119  311536 method   java/util/Hashtable.get                                    59
 120  311536 method   java/util/Hashtable.put                                    63
 121  311536 method   java/util/BitSet.checkInvariants                           71
 122  311536 method   java/util/BitSet.wordIndex                                 72
 123  311536 method   java/lang/StringBuilder.<init>                             73
 124  311536 method   java/lang/StringBuilder.toString                           73
 125  311536 method   java/lang/AbstractStringBuilder.expandCapacity             81
 126  311536 method   java/util/HashMap.hash                                     81
 127  311536 method   java/util/HashMap.indexFor                                 81
 128  311536 method   java/lang/AbstractStringBuilder.<init>                     82
 129  311536 method   java/lang/Character.toLowerCase                            82
 130  311536 method   java/lang/String.startsWith                                83
 131  311536 method   java/util/Arrays.copyOf                                    87
 132  311536 method   java/lang/String.lastIndexOf                               90
 133  311536 method   java/lang/String.substring                                 94
 134  311536 syscall  brk                                                       102
 135  311536 syscall  ioctl                                                     103
 136  311536 method   java/util/Arrays.copyOfRange                              107
 137  311536 syscall  mmap                                                      127
 138  311536 syscall  open                                                      129
 139  311536 syscall  close                                                     133
 140  311536 method   java/lang/String.getChars                                 156
 141  311536 method   java/lang/System.getSecurityManager                       174
 142  311536 method   java/lang/String.<init>                                   175
 143  311536 syscall  xstat                                                     188
 144  311536 method   java/lang/String.equals                                   202
 145  311536 method   java/lang/Math.min                                        208
 146  311536 method   java/lang/String.hashCode                                 213
 147  311536 syscall  lwp_exit                                                  291
 148  311536 method   java/lang/String.indexOf                                  302
 149  311536 method   java/lang/System.arraycopy                                360
 150  311536 method   java/lang/StringBuilder.append                            545
 151  311536 method   java/lang/AbstractStringBuilder.append                    561
 152  311536 syscall  llseek                                                    664
 153  311536 syscall  read                                                      668
 154  311536 method   java/lang/Object.<init>                                   823
 155  311536 method   java/lang/String.charAt                                  1987
 156
 157 While tracing there were numerous system calls made, including 668 reads()'s,
 158 and 664 llseek()'s.  Many Java methods were also called, with 1987
 159 java/lang/String.charAt being the most of a particular kind.
 160
 161 This script can provide an insight to how an application is interacting
 162 with the system, by providing both application method calls and
 163 system calls in the same output.
 164
 165