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      1 /*	$NetBSD: dtrace_test.c,v 1.3 2018/05/28 21:05:03 chs Exp $	*/
      2 
      3 /*-
      4  * Copyright 2008 John Birrell <jb (at) FreeBSD.org>
      5  *
      6  * Redistribution and use in source and binary forms, with or without
      7  * modification, are permitted provided that the following conditions
      8  * are met:
      9  * 1. Redistributions of source code must retain the above copyright
     10  *    notice, this list of conditions and the following disclaimer.
     11  * 2. Redistributions in binary form must reproduce the above copyright
     12  *    notice, this list of conditions and the following disclaimer in the
     13  *    documentation and/or other materials provided with the distribution.
     14  *
     15  * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
     16  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     17  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     18  * ARE DISCLAIMED.  IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
     19  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     20  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     21  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     22  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     23  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     24  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     25  * SUCH DAMAGE.
     26  *
     27  * $FreeBSD: head/sys/cddl/dev/dtrace/dtrace_test.c 258622 2013-11-26 08:46:27Z avg $
     28  *
     29  */
     30 #include <sys/cdefs.h>
     31 #include <sys/types.h>
     32 #include <sys/param.h>
     33 #include <sys/systm.h>
     34 
     35 #include <sys/conf.h>
     36 #include <sys/kernel.h>
     37 #include <sys/module.h>
     38 #include <sys/sdt.h>
     39 #include <sys/sysctl.h>
     40 #include <sys/vnode.h>
     41 
     42 SDT_PROVIDER_DEFINE(test);
     43 
     44 SDT_PROBE_DEFINE7(test, , , sdttest, "int", "int", "int", "int", "int",
     45     "int", "int");
     46 
     47 /*
     48  * These are variables that the DTrace test suite references in the
     49  * Solaris kernel. We define them here so that the tests function
     50  * unaltered.
     51  */
     52 int	kmem_flags;
     53 
     54 typedef struct vnode vnode_t;
     55 vnode_t dummy;
     56 vnode_t *rootvp = &dummy;
     57 
     58 /*
     59  * Test SDT probes with more than 5 arguments. On amd64, such probes require
     60  * special handling since only the first 5 arguments will be passed to
     61  * dtrace_probe() in registers; the rest must be fetched off the stack.
     62  */
     63 static int
     64 dtrace_test_sdttest(SYSCTL_HANDLER_ARGS)
     65 {
     66 	int val, error;
     67 
     68 	val = 0;
     69 	error = sysctl_handle_int(oidp, &val, 0, req);
     70 	if (error || req->newptr == NULL)
     71 		return (error);
     72 	else if (val == 0)
     73 		return (0);
     74 
     75 	SDT_PROBE7(test, , , sdttest, 1, 2, 3, 4, 5, 6, 7);
     76 
     77 	return (error);
     78 }
     79 
     80 static SYSCTL_NODE(_debug, OID_AUTO, dtracetest, CTLFLAG_RD, 0, "");
     81 
     82 SYSCTL_PROC(_debug_dtracetest, OID_AUTO, sdttest, CTLTYPE_INT | CTLFLAG_RW,
     83     NULL, 0, dtrace_test_sdttest, "I", "Trigger the SDT test probe");
     84 
     85 static int
     86 dtrace_test_modevent(module_t mod, int type, void *data)
     87 {
     88 	int error = 0;
     89 
     90 	switch (type) {
     91 	case MOD_LOAD:
     92 		break;
     93 
     94 	case MOD_UNLOAD:
     95 		break;
     96 
     97 	case MOD_SHUTDOWN:
     98 		break;
     99 
    100 	default:
    101 		error = EOPNOTSUPP;
    102 		break;
    103 
    104 	}
    105 	return (error);
    106 }
    107 
    108 DEV_MODULE(dtrace_test, dtrace_test_modevent, NULL);
    109 MODULE_VERSION(dtrace_test, 1);
    110 MODULE_DEPEND(dtrace_test, dtraceall, 1, 1, 1);
    111