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Diffstat (limited to 'staging/darwin-x86/sample/dtrace/hotspot/class_loading_stat.d')
| -rw-r--r-- | staging/darwin-x86/sample/dtrace/hotspot/class_loading_stat.d | 157 |
1 files changed, 157 insertions, 0 deletions
diff --git a/staging/darwin-x86/sample/dtrace/hotspot/class_loading_stat.d b/staging/darwin-x86/sample/dtrace/hotspot/class_loading_stat.d new file mode 100644 index 0000000..7197620 --- /dev/null +++ b/staging/darwin-x86/sample/dtrace/hotspot/class_loading_stat.d @@ -0,0 +1,157 @@ +#!/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); +} |