sys/sys/ktrace.h

   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: src/sys/sys/ktrace.h,v 1.19.2.3 2001/01/06 09:58:23 alfred Exp $
  35  * $DragonFly: src/sys/sys/ktrace.h,v 1.10 2008/04/14 12:01:53 dillon Exp $
  36  */
  37
  38 #ifndef _SYS_KTRACE_H_
  39 #define _SYS_KTRACE_H_
  40
  41 #ifndef _SYS_TYPES_H_
  42 #include <sys/types.h>
  43 #endif
  44 #ifndef _SYS_TIME_H_
  45 #include <sys/time.h>
  46 #endif
  47 #ifndef _SYS_UIO_H_
  48 #include <sys/uio.h>
  49 #endif
  50 #ifndef _SYS_SIGNAL_H_
  51 #include <sys/signal.h>
  52 #endif
  53
  54 struct proc;
  55
  56 struct ktrace_node {
  57         struct vnode    *kn_vp;
  58         int             kn_refs;
  59 };
  60
  61 typedef struct ktrace_node *ktrace_node_t;
  62
  63
  64 /*
  65  * operations to ktrace system call  (KTROP(op))
  66  */
  67 #define KTROP_SET               0       /* set trace points */
  68 #define KTROP_CLEAR             1       /* clear trace points */
  69 #define KTROP_CLEARFILE         2       /* stop all tracing to file */
  70 #define KTROP(o)                ((o)&3) /* macro to extract operation */
  71 /*
  72  * flags (ORed in with operation)
  73  */
  74 #define KTRFLAG_DESCEND         4       /* perform op on all children too */
  75
  76 /*
  77  * ktrace record header
  78  */
  79 struct ktr_header {
  80         int     ktr_len;                /* length of buf */
  81         short   ktr_type;               /* trace record type */
  82         short   ktr_flags;              /* reserved for future use */
  83         pid_t   ktr_pid;                /* process id */
  84         lwpid_t ktr_tid;                /* lwp id */
  85         char    ktr_comm[MAXCOMLEN+1];  /* command name */
  86         struct  timeval ktr_time;       /* timestamp */
  87         caddr_t ktr_buf;
  88 };
  89
  90 #define KTRH_THREADED   0x0001          /* multiple threads present */
  91
  92 /*
  93  * Test for kernel trace point (MP SAFE)
  94  */
  95 #define KTRPOINT(td, type)      \
  96         ((td)->td_proc && ((td)->td_proc->p_traceflag & (1<<(type))) && \
  97         (((td)->td_proc->p_traceflag | (td)->td_lwp->lwp_traceflag) & \
  98           KTRFAC_ACTIVE) == 0)
  99
 100
 101 /*
 102  * ktrace record types
 103  */
 104
 105 /*
 106  * KTR_SYSCALL - system call record
 107  */
 108 #define KTR_SYSCALL     1
 109 struct ktr_syscall {
 110         short   ktr_code;               /* syscall number */
 111         short   ktr_narg;               /* number of arguments */
 112         /*
 113          * followed by ktr_narg register_t
 114          */
 115         register_t      ktr_args[1];
 116 };
 117
 118 /*
 119  * KTR_SYSRET - return from system call record
 120  */
 121 #define KTR_SYSRET      2
 122 struct ktr_sysret {
 123         short   ktr_code;
 124         short   ktr_eosys;
 125         int     ktr_error;
 126         register_t      ktr_retval;
 127 };
 128
 129 /*
 130  * KTR_NAMEI - namei record
 131  */
 132 #define KTR_NAMEI       3
 133         /* record contains pathname */
 134
 135 /*
 136  * KTR_GENIO - trace generic process i/o
 137  */
 138 #define KTR_GENIO       4
 139 struct ktr_genio {
 140         int     ktr_fd;
 141         enum    uio_rw ktr_rw;
 142         /*
 143          * followed by data successfully read/written
 144          */
 145 };
 146
 147 /*
 148  * KTR_PSIG - trace processed signal
 149  */
 150 #define KTR_PSIG        5
 151 struct ktr_psig {
 152         int     signo;
 153         sig_t   action;
 154         int     code;
 155         sigset_t mask;
 156 };
 157
 158 /*
 159  * KTR_CSW - trace context switches
 160  */
 161 #define KTR_CSW         6
 162 struct ktr_csw {
 163         int     out;    /* 1 if switch out, 0 if switch in */
 164         int     user;   /* 1 if usermode (ivcsw), 0 if kernel (vcsw) */
 165 };
 166
 167 /*
 168  * KTR_USER - data comming from userland
 169  */
 170 #define KTR_USER_MAXLEN 2048    /* maximum length of passed data */
 171 #define KTR_USER        7
 172
 173 /*
 174  * kernel trace points (in p_traceflag)
 175  */
 176 #define KTRFAC_MASK     0x00ffffff
 177 #define KTRFAC_SYSCALL  (1<<KTR_SYSCALL)
 178 #define KTRFAC_SYSRET   (1<<KTR_SYSRET)
 179 #define KTRFAC_NAMEI    (1<<KTR_NAMEI)
 180 #define KTRFAC_GENIO    (1<<KTR_GENIO)
 181 #define KTRFAC_PSIG     (1<<KTR_PSIG)
 182 #define KTRFAC_CSW      (1<<KTR_CSW)
 183 #define KTRFAC_USER     (1<<KTR_USER)
 184 /*
 185  * trace flags (also in p_traceflags)
 186  */
 187 #define KTRFAC_ROOT     0x80000000      /* root set this trace */
 188 #define KTRFAC_INHERIT  0x40000000      /* pass trace flags to children */
 189 #define KTRFAC_ACTIVE   0x20000000      /* ktrace logging in progress, ignore */
 190
 191 #ifdef  _KERNEL
 192 void    ktrnamei (struct lwp *,char *);
 193 void    ktrcsw (struct lwp *,int,int);
 194 void    ktrpsig (struct lwp *, int, sig_t, sigset_t *, int);
 195 void    ktrgenio (struct lwp *, int, enum uio_rw, struct uio *, int);
 196 void    ktrsyscall (struct lwp *, int, int narg, register_t args[]);
 197 void    ktrsysret (struct lwp *, int, int, register_t);
 198 void    ktrdestroy (struct ktrace_node **);
 199 struct ktrace_node *ktrinherit (struct ktrace_node *);
 200
 201 #else
 202
 203 #include <sys/cdefs.h>
 204
 205 __BEGIN_DECLS
 206 int     ktrace (const char *, int, int, pid_t);
 207 int     utrace (const void *, size_t);
 208 __END_DECLS
 209
 210 #endif
 211
 212 #endif