1 #!/usr/sbin/dtrace -Zs
2 /*
3  * Copyright (c) 2006, Oracle and/or its affiliates. All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  *
9  *   - Redistributions of source code must retain the above copyright
10  *     notice, this list of conditions and the following disclaimer.
11  *
12  *   - Redistributions in binary form must reproduce the above copyright
13  *     notice, this list of conditions and the following disclaimer in the
14  *     documentation and/or other materials provided with the distribution.
15  *
16  *   - Neither the name of Oracle nor the names of its
17  *     contributors may be used to endorse or promote products derived
18  *     from this software without specific prior written permission.
19  *
20  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
21  * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
22  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
23  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
24  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
25  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
26  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
27  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
28  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
29  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
30  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31  */
32 
33 /*
34 */
35 
36 /*
37  * Usage:
38  *   1. hotspot_calls_tree.d -c "java ..."
39  *   2. hotspot_calls_tree.d -p JAVA_PID
40  *
41  * This script prints calls tree of fired 'hotspot' probes.
42  *
43  * Notes:
44  *    The script uses 'monitors' probes which are disabled by default since
45  *    it incurs performance overhead to the application. To enable them, you
46  *    need to turn on the ExtendedDTraceProbes VM option. You can either
47  *    start the application with -XX:+ExtendedDTraceProbes option or use the
48  *    jinfo command to enable it at runtime as follows:
49  *
50  *       jinfo -flag +ExtendedDTraceProbes <java_pid>
51  *
52  */
53 
54 #pragma D option quiet
55 #pragma D option destructive
56 #pragma D option defaultargs
57 #pragma D option aggrate=100ms
58 
59 self int indent;
60 string PAUSE_AT_STARTUP_FILE;
61 
62 :::BEGIN
63 {
64     SAMPLE_NAME = "hotspot probes tracing";
65 
66     printf("BEGIN %s\n\n", SAMPLE_NAME);
67 
68     self->indent = 10;
69 }
70 
71 hotspot$target:::class-loaded,
72 hotspot$target:::class-unloaded,
73 hotspot$target:::compiled-method-load,
74 hotspot$target:::compiled-method-unload,
75 hotspot$target:::monitor-notify,
76 hotspot$target:::monitor-notifyAll
77 {
78     printf("%d %*s <-> %s\n", curcpu->cpu_id, self->indent, "", probename);
79 }
80 
81 hotspot$target:::vm-init-begin,
82 hotspot$target:::gc-begin,
83 hotspot$target:::mem-pool-gc-begin,
84 hotspot$target:::thread-start,
85 hotspot$target:::method-compile-begin,
86 hotspot$target:::monitor-contended-enter,
87 hotspot$target:::monitor-wait
88 {
89     self->indent ++;
90     printf("%d %*s -> %s\n", curcpu->cpu_id, self->indent, "", probename);
91 }
92 
93 hotspot$target:::vm-init-end,
94 hotspot$target:::vm-shutdown,
95 hotspot$target:::gc-end,
96 hotspot$target:::mem-pool-gc-end,
97 hotspot$target:::thread-stop,
98 hotspot$target:::method-compile-end,
99 hotspot$target:::monitor-contended-entered,
100 hotspot$target:::monitor-contended-exit,
101 hotspot$target:::monitor-waited
102 {
103     printf("%d %*s <- %s\n", curcpu->cpu_id, self->indent, "", probename);
104     self->indent --;
105 }
106 
107 :::END
108 {
109     printf("\nEND of %s\n", SAMPLE_NAME);
110 }
111 
112 syscall::rexit:entry,
113 syscall::exit:entry
114 /pid == $target/
115 {
116     exit(0);
117 }
118