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/sys/ktrace.h

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    1 /*
    2  * Copyright (c) 1988, 1993
    3  *      The Regents of the University of California.  All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  * 3. All advertising materials mentioning features or use of this software
   14  *    must display the following acknowledgement:
   15  *      This product includes software developed by the University of
   16  *      California, Berkeley and its contributors.
   17  * 4. Neither the name of the University nor the names of its contributors
   18  *    may be used to endorse or promote products derived from this software
   19  *    without specific prior written permission.
   20  *
   21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   31  * SUCH DAMAGE.
   32  *
   33  *      @(#)ktrace.h    8.1 (Berkeley) 6/2/93
   34  * $FreeBSD: stable/4/sys/sys/ktrace.h 70709 2001-01-06 09:58:24Z alfred $
   35  */
   36 
   37 #ifndef _SYS_KTRACE_H_
   38 #define _SYS_KTRACE_H_
   39 
   40 /*
   41  * operations to ktrace system call  (KTROP(op))
   42  */
   43 #define KTROP_SET               0       /* set trace points */
   44 #define KTROP_CLEAR             1       /* clear trace points */
   45 #define KTROP_CLEARFILE         2       /* stop all tracing to file */
   46 #define KTROP(o)                ((o)&3) /* macro to extract operation */
   47 /*
   48  * flags (ORed in with operation)
   49  */
   50 #define KTRFLAG_DESCEND         4       /* perform op on all children too */
   51 
   52 /*
   53  * ktrace record header
   54  */
   55 struct ktr_header {
   56         int     ktr_len;                /* length of buf */
   57         short   ktr_type;               /* trace record type */
   58         pid_t   ktr_pid;                /* process id */
   59         char    ktr_comm[MAXCOMLEN+1];  /* command name */
   60         struct  timeval ktr_time;       /* timestamp */
   61         caddr_t ktr_buf;
   62 };
   63 
   64 /*
   65  * Test for kernel trace point (MP SAFE)
   66  */
   67 #define KTRPOINT(p, type)       \
   68         (((p)->p_traceflag & ((1<<(type))|KTRFAC_ACTIVE)) == (1<<(type)))
   69 
   70 /*
   71  * ktrace record types
   72  */
   73 
   74 /*
   75  * KTR_SYSCALL - system call record
   76  */
   77 #define KTR_SYSCALL     1
   78 struct ktr_syscall {
   79         short   ktr_code;               /* syscall number */
   80         short   ktr_narg;               /* number of arguments */
   81         /*
   82          * followed by ktr_narg register_t
   83          */
   84         register_t      ktr_args[1];
   85 };
   86 
   87 /*
   88  * KTR_SYSRET - return from system call record
   89  */
   90 #define KTR_SYSRET      2
   91 struct ktr_sysret {
   92         short   ktr_code;
   93         short   ktr_eosys;
   94         int     ktr_error;
   95         register_t      ktr_retval;
   96 };
   97 
   98 /*
   99  * KTR_NAMEI - namei record
  100  */
  101 #define KTR_NAMEI       3
  102         /* record contains pathname */
  103 
  104 /*
  105  * KTR_GENIO - trace generic process i/o
  106  */
  107 #define KTR_GENIO       4
  108 struct ktr_genio {
  109         int     ktr_fd;
  110         enum    uio_rw ktr_rw;
  111         /*
  112          * followed by data successfully read/written
  113          */
  114 };
  115 
  116 /*
  117  * KTR_PSIG - trace processed signal
  118  */
  119 #define KTR_PSIG        5
  120 struct ktr_psig {
  121         int     signo;
  122         sig_t   action;
  123         int     code;
  124         sigset_t mask;
  125 };
  126 
  127 /*
  128  * KTR_CSW - trace context switches
  129  */
  130 #define KTR_CSW         6
  131 struct ktr_csw {
  132         int     out;    /* 1 if switch out, 0 if switch in */
  133         int     user;   /* 1 if usermode (ivcsw), 0 if kernel (vcsw) */
  134 };
  135 
  136 /*
  137  * KTR_USER - data comming from userland
  138  */
  139 #define KTR_USER_MAXLEN 2048    /* maximum length of passed data */
  140 #define KTR_USER        7
  141 
  142 /*
  143  * kernel trace points (in p_traceflag)
  144  */
  145 #define KTRFAC_MASK     0x00ffffff
  146 #define KTRFAC_SYSCALL  (1<<KTR_SYSCALL)
  147 #define KTRFAC_SYSRET   (1<<KTR_SYSRET)
  148 #define KTRFAC_NAMEI    (1<<KTR_NAMEI)
  149 #define KTRFAC_GENIO    (1<<KTR_GENIO)
  150 #define KTRFAC_PSIG     (1<<KTR_PSIG)
  151 #define KTRFAC_CSW      (1<<KTR_CSW)
  152 #define KTRFAC_USER     (1<<KTR_USER)
  153 /*
  154  * trace flags (also in p_traceflags)
  155  */
  156 #define KTRFAC_ROOT     0x80000000      /* root set this trace */
  157 #define KTRFAC_INHERIT  0x40000000      /* pass trace flags to children */
  158 #define KTRFAC_ACTIVE   0x20000000      /* ktrace logging in progress, ignore */
  159 
  160 #ifdef  _KERNEL
  161 void    ktrnamei __P((struct vnode *,char *));
  162 void    ktrcsw __P((struct vnode *,int,int));
  163 void    ktrpsig __P((struct vnode *, int, sig_t, sigset_t *, int));
  164 void    ktrgenio __P((struct vnode *, int, enum uio_rw, struct uio *, int));
  165 void    ktrsyscall __P((struct vnode *, int, int narg, register_t args[]));
  166 void    ktrsysret __P((struct vnode *, int, int, register_t));
  167 
  168 #else
  169 
  170 #include <sys/cdefs.h>
  171 
  172 __BEGIN_DECLS
  173 int     ktrace __P((const char *, int, int, pid_t));
  174 int     utrace __P((const void *, size_t));
  175 __END_DECLS
  176 
  177 #endif
  178 
  179 #endif

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