J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | #!/usr/sbin/dtrace -Zs |
| 2 | /* |
| 3 | * Copyright 2006 Sun Microsystems, Inc. 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 Sun Microsystems 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. monitors.d -c "java ..." |
| 39 | * 2. monitors.d -p JAVA_PID |
| 40 | * |
| 41 | * The script traces monitor related probes. |
| 42 | * |
| 43 | * Notes: |
| 44 | * - These probes are disabled by default since it incurs performance |
| 45 | * overhead to the application. To trace the monitor-* probes, you need |
| 46 | * to turn on the ExtendedDTraceProbes VM option. |
| 47 | * You can either start the application with -XX:+ExtendedDTraceProbes |
| 48 | * option or use the 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 | |
| 60 | self string thread_name; |
| 61 | self char* str_ptr; |
| 62 | |
| 63 | :::BEGIN |
| 64 | { |
| 65 | SAMPLE_NAME = "hotspot monitors tracing"; |
| 66 | |
| 67 | printf("BEGIN %s\n\n", SAMPLE_NAME); |
| 68 | } |
| 69 | |
| 70 | /* |
| 71 | * hotspot:::thread-start, hotspot:::thread-stop probe arguments: |
| 72 | * arg0: char*, thread name passed as mUTF8 string |
| 73 | * arg1: uintptr_t, thread name length |
| 74 | * arg2: uintptr_t, Java thread id |
| 75 | * arg3: uintptr_t, native/OS thread id |
| 76 | * arg4: uintptr_t, is a daemon or not |
| 77 | */ |
| 78 | hotspot$target:::thread-start |
| 79 | { |
| 80 | self->str_ptr = (char*) copyin(arg0, arg1+1); |
| 81 | self->str_ptr[arg1] = '\0'; |
| 82 | self->thread_name = (string) self->str_ptr; |
| 83 | |
| 84 | printf("thread-start: id=%d, is_daemon=%d, name=%s, os_id=%d\n", |
| 85 | arg2, arg4, self->thread_name, arg3); |
| 86 | |
| 87 | threads[arg2] = self->thread_name; |
| 88 | } |
| 89 | |
| 90 | |
| 91 | hotspot$target:::thread-stop |
| 92 | { |
| 93 | self->str_ptr = (char*) copyin(arg0, arg1+1); |
| 94 | self->str_ptr[arg1] = '\0'; |
| 95 | self->thread_name = (string) self->str_ptr; |
| 96 | |
| 97 | |
| 98 | printf("thread-stop: id=%d, is_daemon=%d, name=%s, os_id=%d\n", |
| 99 | arg2, arg4, self->thread_name, arg3); |
| 100 | } |
| 101 | |
| 102 | /* |
| 103 | * |
| 104 | * hotspot::monitor-contended-enter, hotspot::monitor-contended-entered |
| 105 | * |
| 106 | * arg0: uintptr_t, the Java thread identifier for the thread peforming |
| 107 | * the monitor operation |
| 108 | * arg1: uintptr_t, a unique, but opaque identifier for the specific |
| 109 | * monitor that the action is performed upon |
| 110 | * arg2: char*, a pointer to mUTF-8 string data which contains the |
| 111 | * name of the class of the object being acted upon |
| 112 | * arg3: uintptr_t, the length of the class name (in bytes) |
| 113 | */ |
| 114 | |
| 115 | hotspot$target:::monitor-contended-enter |
| 116 | { |
| 117 | /* (uintptr_t thread_id, uintptr_t monitor_id, |
| 118 | char* obj_class_name, uintptr_t obj_class_name_len) */ |
| 119 | |
| 120 | self->str_ptr = (char*) copyin(arg2, arg3+1); |
| 121 | self->str_ptr[arg3] = '\0'; |
| 122 | self->class_name = (string) self->str_ptr; |
| 123 | |
| 124 | monitors[arg1] = self->class_name; |
| 125 | |
| 126 | monitors_enter[arg1] = arg0; |
| 127 | printf("%s: -> enter monitor (%d) %s\n", |
| 128 | threads[arg0], arg1, monitors[arg1]); |
| 129 | } |
| 130 | |
| 131 | hotspot$target:::monitor-contended-entered |
| 132 | { |
| 133 | /* (uintptr_t thread_id, uintptr_t monitor_id, char* obj_class_name, |
| 134 | uintptr_t obj_class_name_len) */ |
| 135 | |
| 136 | monitors_entered[arg1] = arg0; |
| 137 | printf("%s: <- entered monitor (%d) %s\n", |
| 138 | threads[arg0], arg1, monitors[arg1]); |
| 139 | } |
| 140 | |
| 141 | |
| 142 | :::END |
| 143 | { |
| 144 | printf("\nEND of %s\n", SAMPLE_NAME); |
| 145 | } |
| 146 | |
| 147 | syscall::rexit:entry, |
| 148 | syscall::exit:entry |
| 149 | /pid == $target/ |
| 150 | { |
| 151 | exit(0); |
| 152 | } |