The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/kern/kern_sdt.c

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    1 /*-
    2  * Copyright 2006-2008 John Birrell <jb@FreeBSD.org>
    3  *
    4  * Redistribution and use in source and binary forms, with or without
    5  * modification, are permitted provided that the following conditions
    6  * are met:
    7  * 1. Redistributions of source code must retain the above copyright
    8  *    notice, this list of conditions and the following disclaimer.
    9  * 2. Redistributions in binary form must reproduce the above copyright
   10  *    notice, this list of conditions and the following disclaimer in the
   11  *    documentation and/or other materials provided with the distribution.
   12  * 
   13  * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   14  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   16  * ARE DISCLAIMED.  IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
   17  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   18  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   19  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   20  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   21  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   22  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   23  * SUCH DAMAGE.
   24  *
   25  * $FreeBSD: stable/10/sys/kern/kern_sdt.c 263283 2014-03-18 00:55:19Z markj $
   26  */
   27 
   28 #include "opt_kdtrace.h"
   29 
   30 #include <sys/param.h>
   31 #include <sys/systm.h>
   32 #include <sys/kdb.h>
   33 #include <sys/sdt.h>
   34 
   35 SDT_PROVIDER_DEFINE(sdt);
   36 
   37 /*
   38  * Hook for the DTrace probe function. The SDT provider will set this to
   39  * dtrace_probe() when it loads.
   40  */
   41 sdt_probe_func_t sdt_probe_func = sdt_probe_stub;
   42 
   43 /*
   44  * This is a stub for probe calls in case kernel DTrace support isn't
   45  * enabled. It should never get called because there is no DTrace support
   46  * to enable it.
   47  */
   48 void
   49 sdt_probe_stub(uint32_t id, uintptr_t arg0, uintptr_t arg1,
   50     uintptr_t arg2, uintptr_t arg3, uintptr_t arg4)
   51 {
   52 
   53         printf("sdt_probe_stub: unexpectedly called\n");
   54         kdb_backtrace();
   55 }

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