#!/usr/sbin/dtrace -qs
/*
  Program: Print object allocation statistics <whoallocatebybytes.d>

  Author: Matty < matty91 at gmail dot com >

  Current Version: 1.0

  Date: 8-29-2007

  Revision History: 
  
  Version 1.0
   - initial release

  License:
    The contents of this file are subject to the terms of the
    Common Development and Distribution License, Version 1.0 only
    (the "License").  You may not use this file except in compliance
    with the License.
 
    You can obtain a copy of the license at Docs/cddl1.txt
    or http://www.opensolaris.org/os/licensing.
    See the License for the specific language governing permissions
    and limitations under the License.

  Purpose: Shows the Java stack frames that are responsible for object
           allocations.

  Sample output:

  $ whoallocatebybytes.d
 
    libjvm.so`__1cNSharedRuntimeTdtrace_object_alloc6FpnHoopDesc__i_+0x4f
    dtrace_object_alloc Runtime1 stub
    MyTest.foo()V*
    Test.main([Ljava/lang/String;)V
    StubRoutines (1)
       57062640
*/

hotspot*:::object-alloc
{
    @objects[jstack(20,2048)] = sum(arg3);
}