#!/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. hotspot_jni_calls_stat.d -c "java ..."

 *    2. hotspot_jni_calls_stat.d -p JAVA_PID

 *

 * This script collects statistics about how many times particular JNI

 * method has been called.

 *

 */

#pragma D option quiet

#pragma D option destructive

#pragma D option defaultargs

#pragma D option bufsize=16m

#pragma D option aggrate=100ms

:::BEGIN

{

    printf("BEGIN hotspot_jni tracing\n");

}

hotspot_jni$target:::*-entry

{

    JNI_CALLS ++;

    @jni_calls[probename] = count();

}

:::END

{

    printa("%10@d %s\n", @jni_calls);

    printf("\n");

    printf("Total number of JNI calls: %d\n", JNI_CALLS);

    printf("\nEND hotspot_jni tracing.\n");

}

syscall::rexit:entry,

syscall::exit:entry

/pid == $target/

{

   exit(0);

}