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. class_loading_stat.d -c "java ..." INTERVAL_SECS |
| 39 | * 2. class_loading_stat.d -p JAVA_PID INTERVAL_SECS |
| 40 | * |
| 41 | * This script collects statistics about loaded and unloaded Java classes |
| 42 | * and dump current state to stdout every INTERVAL_SECS seconds. If |
| 43 | * INTERVAL_SECS is not set then 10 seconds interval is used. |
| 44 | * |
| 45 | */ |
| 46 | |
| 47 | #pragma D option quiet |
| 48 | #pragma D option destructive |
| 49 | #pragma D option defaultargs |
| 50 | #pragma D option aggrate=100ms |
| 51 | |
| 52 | |
| 53 | self char *str_ptr; |
| 54 | self string class_name; |
| 55 | self string package_name; |
| 56 | |
| 57 | int INTERVAL_SECS; |
| 58 | |
| 59 | :::BEGIN |
| 60 | { |
| 61 | SAMPLE_NAME = "hotspot class loadin tracing"; |
| 62 | |
| 63 | INTERVAL_SECS = $1 ? $1 : 10; |
| 64 | SAMPLING_TIME = timestamp + INTERVAL_SECS * 1000000000ull; |
| 65 | |
| 66 | LOADED_CLASSES_CNT = 0; |
| 67 | UNLOADED_CLASSES_CNT = 0; |
| 68 | |
| 69 | LINE_SEP = |
| 70 | "------------------------------------------------------------------------"; |
| 71 | |
| 72 | printf("BEGIN %s\n\n", SAMPLE_NAME); |
| 73 | } |
| 74 | |
| 75 | /* |
| 76 | * hotspot:::class-loaded, hotspot:::class-unloaded probe arguments: |
| 77 | * arg0: char*, class name passed as mUTF8 string |
| 78 | * arg1: uintptr_t, class name length |
| 79 | * arg2: void*, class loader ID, which is unique identifier for |
| 80 | * a class loader in the VM. |
| 81 | * arg3: uintptr_t, class is shared or not |
| 82 | */ |
| 83 | hotspot$target:::class-loaded |
| 84 | { |
| 85 | LOADED_CLASSES_CNT ++; |
| 86 | |
| 87 | self->str_ptr = (char*) copyin(arg0, arg1+1); |
| 88 | self->str_ptr[arg1] = '\0'; |
| 89 | self->class_name = (string) self->str_ptr; |
| 90 | |
| 91 | self->package_name = dirname(self->class_name); |
| 92 | |
| 93 | @classes_loaded[self->package_name] = count(); |
| 94 | } |
| 95 | |
| 96 | hotspot$target:::class-unloaded |
| 97 | { |
| 98 | UNLOADED_CLASSES_CNT ++; |
| 99 | |
| 100 | self->str_ptr = (char*) copyin(arg0, arg1+1); |
| 101 | self->str_ptr[arg1] = '\0'; |
| 102 | self->class_name = (string) self->str_ptr; |
| 103 | |
| 104 | self->package_name = dirname(self->class_name); |
| 105 | |
| 106 | @classes_unloaded[self->package_name] = count(); |
| 107 | } |
| 108 | |
| 109 | |
| 110 | tick-1sec |
| 111 | /timestamp > SAMPLING_TIME/ |
| 112 | { |
| 113 | printf("%s\n", LINE_SEP); |
| 114 | printf("%Y\n", walltimestamp); |
| 115 | printf("%s\n", LINE_SEP); |
| 116 | |
| 117 | printf("Loaded classes by package:\n"); |
| 118 | printa("%10@d %s\n", @classes_loaded); |
| 119 | |
| 120 | printf("\n"); |
| 121 | printf("Unloaded classes by package:\n"); |
| 122 | printa("%10@d %s\n", @classes_unloaded); |
| 123 | |
| 124 | printf("\n"); |
| 125 | printf("Number of loaded classes: %10d\n", LOADED_CLASSES_CNT); |
| 126 | printf("Number of unloaded classes: %10d\n", UNLOADED_CLASSES_CNT); |
| 127 | |
| 128 | SAMPLING_TIME = timestamp + INTERVAL_SECS * 1000000000ull; |
| 129 | } |
| 130 | |
| 131 | |
| 132 | :::END |
| 133 | { |
| 134 | printf("%s\n", LINE_SEP); |
| 135 | printf("%Y\n", walltimestamp); |
| 136 | printf("%s\n", LINE_SEP); |
| 137 | |
| 138 | printf("Loaded classes by package:\n"); |
| 139 | printa("%10@d %s\n", @classes_loaded); |
| 140 | |
| 141 | printf("\n"); |
| 142 | printf("Unloaded classes by package:\n"); |
| 143 | printa("%10@d %s\n", @classes_unloaded); |
| 144 | |
| 145 | printf("\n"); |
| 146 | printf("Number of loaded classes: %10d\n", LOADED_CLASSES_CNT); |
| 147 | printf("Number of unloaded classes: %10d\n", UNLOADED_CLASSES_CNT); |
| 148 | |
| 149 | printf("\nEND of %s\n", SAMPLE_NAME); |
| 150 | } |
| 151 | |
| 152 | syscall::rexit:entry, |
| 153 | syscall::exit:entry |
| 154 | /pid == $target/ |
| 155 | { |
| 156 | exit(0); |
| 157 | } |