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 /*      $OpenBSD: ktrace.h,v 1.9 2006/05/17 02:11:25 tedu Exp $ */
    2 /*      $NetBSD: ktrace.h,v 1.12 1996/02/04 02:12:29 christos Exp $     */
    3 
    4 /*
    5  * Copyright (c) 1988, 1993
    6  *      The Regents of the University of California.  All rights reserved.
    7  *
    8  * Redistribution and use in source and binary forms, with or without
    9  * modification, are permitted provided that the following conditions
   10  * are met:
   11  * 1. Redistributions of source code must retain the above copyright
   12  *    notice, this list of conditions and the following disclaimer.
   13  * 2. Redistributions in binary form must reproduce the above copyright
   14  *    notice, this list of conditions and the following disclaimer in the
   15  *    documentation and/or other materials provided with the distribution.
   16  * 3. Neither the name of the University nor the names of its contributors
   17  *    may be used to endorse or promote products derived from this software
   18  *    without specific prior written permission.
   19  *
   20  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   30  * SUCH DAMAGE.
   31  *
   32  *      @(#)ktrace.h    8.1 (Berkeley) 6/2/93
   33  */
   34 
   35 /*
   36  * operations to ktrace system call  (KTROP(op))
   37  */
   38 #define KTROP_SET               0       /* set trace points */
   39 #define KTROP_CLEAR             1       /* clear trace points */
   40 #define KTROP_CLEARFILE         2       /* stop all tracing to file */
   41 #define KTROP(o)                ((o)&3) /* macro to extract operation */
   42 /*
   43  * flags (ORed in with operation)
   44  */
   45 #define KTRFLAG_DESCEND         4       /* perform op on all children too */
   46 
   47 /*
   48  * ktrace record header
   49  */
   50 struct ktr_header {
   51         size_t  ktr_len;                /* length of buf */
   52         pid_t   ktr_pid;                /* process id */
   53         char    ktr_comm[MAXCOMLEN+1];  /* command name */
   54         short   ktr_type;               /* trace record type */
   55         struct  timeval ktr_time;       /* timestamp */
   56         caddr_t ktr_buf;
   57 };
   58 
   59 /*
   60  * Test for kernel trace point
   61  */
   62 #define KTRPOINT(p, type)       \
   63         (((p)->p_traceflag & ((1<<(type))|KTRFAC_ACTIVE)) == (1<<(type)))
   64 
   65 /*
   66  * ktrace record types
   67  */
   68 
   69 /*
   70  * KTR_SYSCALL - system call record
   71  */
   72 #define KTR_SYSCALL     1
   73 struct ktr_syscall {
   74         int     ktr_code;               /* syscall number */
   75         int     ktr_argsize;            /* size of arguments */
   76         /*
   77          * followed by ktr_argsize/sizeof(register_t) "register_t"s
   78          */
   79 };
   80 
   81 /*
   82  * KTR_SYSRET - return from system call record
   83  */
   84 #define KTR_SYSRET      2
   85 struct ktr_sysret {
   86         short   ktr_code;
   87         short   ktr_eosys;
   88         int     ktr_error;
   89         int     ktr_retval;
   90 };
   91 
   92 /*
   93  * KTR_NAMEI - namei record
   94  */
   95 #define KTR_NAMEI       3
   96         /* record contains pathname */
   97 
   98 /*
   99  * KTR_GENIO - trace generic process i/o
  100  */
  101 #define KTR_GENIO       4
  102 struct ktr_genio {
  103         int     ktr_fd;
  104         enum    uio_rw ktr_rw;
  105         /*
  106          * followed by data successfully read/written
  107          */
  108 };
  109 
  110 /*
  111  * KTR_PSIG - trace processed signal
  112  */
  113 #define KTR_PSIG        5
  114 struct ktr_psig {
  115         int     signo;
  116         sig_t   action;
  117         int     mask;
  118         int     code;
  119         siginfo_t si;
  120 };
  121 
  122 /*
  123  * KTR_CSW - trace context switches
  124  */
  125 #define KTR_CSW         6
  126 struct ktr_csw {
  127         int     out;    /* 1 if switch out, 0 if switch in */
  128         int     user;   /* 1 if usermode (ivcsw), 0 if kernel (vcsw) */
  129 };
  130 
  131 /*
  132  * KTR_EMUL - emulation change
  133  */
  134 #define KTR_EMUL        7
  135         /* record contains emulation name */
  136 
  137 
  138 /*
  139  * kernel trace points (in p_traceflag)
  140  */
  141 #define KTRFAC_MASK     0x00ffffff
  142 #define KTRFAC_SYSCALL  (1<<KTR_SYSCALL)
  143 #define KTRFAC_SYSRET   (1<<KTR_SYSRET)
  144 #define KTRFAC_NAMEI    (1<<KTR_NAMEI)
  145 #define KTRFAC_GENIO    (1<<KTR_GENIO)
  146 #define KTRFAC_PSIG     (1<<KTR_PSIG)
  147 #define KTRFAC_CSW      (1<<KTR_CSW)
  148 #define KTRFAC_EMUL     (1<<KTR_EMUL)
  149 /*
  150  * trace flags (also in p_traceflags)
  151  */
  152 #define KTRFAC_ROOT     0x80000000      /* root set this trace */
  153 #define KTRFAC_INHERIT  0x40000000      /* pass trace flags to children */
  154 #define KTRFAC_ACTIVE   0x20000000      /* ktrace logging in progress, ignore */
  155 
  156 #ifndef _KERNEL
  157 
  158 #include <sys/cdefs.h>
  159 
  160 __BEGIN_DECLS
  161 int     ktrace(const char *, int, int, pid_t);
  162 __END_DECLS
  163 
  164 #else
  165 
  166 void ktrcsw(struct proc *, int, int);
  167 void ktremul(struct proc *, char *);
  168 void ktrgenio(struct proc *, int, enum uio_rw, struct iovec *, int, int);
  169 void ktrnamei(struct proc *, char *);
  170 void ktrpsig(struct proc *, int, sig_t, int, int, siginfo_t *);
  171 void ktrsyscall(struct proc *, register_t, size_t, register_t []);
  172 void ktrsysret(struct proc *, register_t, int, register_t);
  173 
  174 void ktrsettracevnode(struct proc *, struct vnode *);
  175 
  176 #endif  /* !_KERNEL */

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