| #!/usr/sbin/dtrace -Zs |
| /* |
| * Copyright (c) 2006, Oracle and/or its affiliates. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * - Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * |
| * - Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * - Neither the name of Oracle nor the names of its |
| * contributors may be used to endorse or promote products derived |
| * from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS |
| * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, |
| * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR |
| * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
| * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
| * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| /* |
| */ |
| |
| /* |
| * Usage: |
| * 1. class_loading_stat.d -c "java ..." INTERVAL_SECS |
| * 2. class_loading_stat.d -p JAVA_PID INTERVAL_SECS |
| * |
| * This script collects statistics about loaded and unloaded Java classes |
| * and dump current state to stdout every INTERVAL_SECS seconds. If |
| * INTERVAL_SECS is not set then 10 seconds interval is used. |
| * |
| */ |
| |
| #pragma D option quiet |
| #pragma D option destructive |
| #pragma D option defaultargs |
| #pragma D option aggrate=100ms |
| |
| |
| self char *str_ptr; |
| self string class_name; |
| self string package_name; |
| |
| int INTERVAL_SECS; |
| |
| :::BEGIN |
| { |
| SAMPLE_NAME = "hotspot class loadin tracing"; |
| |
| INTERVAL_SECS = $1 ? $1 : 10; |
| SAMPLING_TIME = timestamp + INTERVAL_SECS * 1000000000ull; |
| |
| LOADED_CLASSES_CNT = 0; |
| UNLOADED_CLASSES_CNT = 0; |
| |
| LINE_SEP = |
| "------------------------------------------------------------------------"; |
| |
| printf("BEGIN %s\n\n", SAMPLE_NAME); |
| } |
| |
| /* |
| * hotspot:::class-loaded, hotspot:::class-unloaded probe arguments: |
| * arg0: char*, class name passed as mUTF8 string |
| * arg1: uintptr_t, class name length |
| * arg2: void*, class loader ID, which is unique identifier for |
| * a class loader in the VM. |
| * arg3: uintptr_t, class is shared or not |
| */ |
| hotspot$target:::class-loaded |
| { |
| LOADED_CLASSES_CNT ++; |
| |
| self->str_ptr = (char*) copyin(arg0, arg1+1); |
| self->str_ptr[arg1] = '\0'; |
| self->class_name = (string) self->str_ptr; |
| |
| self->package_name = dirname(self->class_name); |
| |
| @classes_loaded[self->package_name] = count(); |
| } |
| |
| hotspot$target:::class-unloaded |
| { |
| UNLOADED_CLASSES_CNT ++; |
| |
| self->str_ptr = (char*) copyin(arg0, arg1+1); |
| self->str_ptr[arg1] = '\0'; |
| self->class_name = (string) self->str_ptr; |
| |
| self->package_name = dirname(self->class_name); |
| |
| @classes_unloaded[self->package_name] = count(); |
| } |
| |
| |
| tick-1sec |
| /timestamp > SAMPLING_TIME/ |
| { |
| printf("%s\n", LINE_SEP); |
| printf("%Y\n", walltimestamp); |
| printf("%s\n", LINE_SEP); |
| |
| printf("Loaded classes by package:\n"); |
| printa("%10@d %s\n", @classes_loaded); |
| |
| printf("\n"); |
| printf("Unloaded classes by package:\n"); |
| printa("%10@d %s\n", @classes_unloaded); |
| |
| printf("\n"); |
| printf("Number of loaded classes: %10d\n", LOADED_CLASSES_CNT); |
| printf("Number of unloaded classes: %10d\n", UNLOADED_CLASSES_CNT); |
| |
| SAMPLING_TIME = timestamp + INTERVAL_SECS * 1000000000ull; |
| } |
| |
| |
| :::END |
| { |
| printf("%s\n", LINE_SEP); |
| printf("%Y\n", walltimestamp); |
| printf("%s\n", LINE_SEP); |
| |
| printf("Loaded classes by package:\n"); |
| printa("%10@d %s\n", @classes_loaded); |
| |
| printf("\n"); |
| printf("Unloaded classes by package:\n"); |
| printa("%10@d %s\n", @classes_unloaded); |
| |
| printf("\n"); |
| printf("Number of loaded classes: %10d\n", LOADED_CLASSES_CNT); |
| printf("Number of unloaded classes: %10d\n", UNLOADED_CLASSES_CNT); |
| |
| printf("\nEND of %s\n", SAMPLE_NAME); |
| } |
| |
| syscall::rexit:entry, |
| syscall::exit:entry |
| /pid == $target/ |
| { |
| exit(0); |
| } |