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. Neither the name of the University nor the names of its contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  *
  29  *      @(#)ktrace.h    8.1 (Berkeley) 6/2/93
  30  * $FreeBSD: src/sys/sys/ktrace.h,v 1.19.2.3 2001/01/06 09:58:23 alfred Exp $
  31  * $DragonFly: src/sys/sys/ktrace.h,v 1.10 2008/04/14 12:01:53 dillon Exp $
  32  */
  33
  34 #ifndef _SYS_KTRACE_H_
  35 #define _SYS_KTRACE_H_
  36
  37 #ifndef _SYS_TYPES_H_
  38 #include <sys/types.h>
  39 #endif
  40 #ifndef _SYS_TIME_H_
  41 #include <sys/time.h>
  42 #endif
  43 #ifndef _SYS_UIO_H_
  44 #include <sys/uio.h>
  45 #endif
  46 #ifndef _SYS_SIGNAL_H_
  47 #include <sys/signal.h>
  48 #endif
  49
  50 struct proc;
  51
  52 struct ktrace_node {
  53         struct vnode    *kn_vp;
  54         int             kn_refs;
  55 };
  56
  57 typedef struct ktrace_node *ktrace_node_t;
  58
  59
  60 /*
  61  * operations to ktrace system call  (KTROP(op))
  62  */
  63 #define KTROP_SET               0       /* set trace points */
  64 #define KTROP_CLEAR             1       /* clear trace points */
  65 #define KTROP_CLEARFILE         2       /* stop all tracing to file */
  66 #define KTROP(o)                ((o)&3) /* macro to extract operation */
  67 /*
  68  * flags (ORed in with operation)
  69  */
  70 #define KTRFLAG_DESCEND         4       /* perform op on all children too */
  71
  72 /*
  73  * ktrace record header
  74  */
  75 struct ktr_header {
  76         int     ktr_len;                /* length of buf */
  77         short   ktr_type;               /* trace record type */
  78         short   ktr_flags;              /* reserved for future use */
  79         pid_t   ktr_pid;                /* process id */
  80         lwpid_t ktr_tid;                /* lwp id */
  81         char    ktr_comm[MAXCOMLEN+1];  /* command name */
  82         struct  timeval ktr_time;       /* timestamp */
  83         caddr_t ktr_buf;
  84 };
  85
  86 #define KTRH_THREADED   0x0001          /* multiple threads present */
  87
  88 #define KTRH_CPUID_ENCODE(cpuid)        (((cpuid) & 0xFF) << 8)
  89 #define KTRH_CPUID_DECODE(flags)        (((flags) >> 8) & 0xFF)
  90
  91 /*
  92  * Test for kernel trace point (MP SAFE)
  93  */
  94 #define KTRPOINT(td, type)      \
  95         ((td)->td_proc && ((td)->td_proc->p_traceflag & (1<<(type))) && \
  96         (((td)->td_proc->p_traceflag | (td)->td_lwp->lwp_traceflag) & \
  97           KTRFAC_ACTIVE) == 0)
  98
  99
 100 /*
 101  * ktrace record types
 102  */
 103
 104 /*
 105  * KTR_SYSCALL - system call record
 106  */
 107 #define KTR_SYSCALL     1
 108 struct ktr_syscall {
 109         short   ktr_code;               /* syscall number */
 110         short   ktr_narg;               /* number of arguments */
 111         /*
 112          * Followed by ktr_narg register_t (can be more than 8)
 113          */
 114         register_t      ktr_args[8];
 115 };
 116
 117 /*
 118  * KTR_SYSRET - return from system call record
 119  */
 120 #define KTR_SYSRET      2
 121 struct ktr_sysret {
 122         short   ktr_code;
 123         short   ktr_eosys;
 124         int     ktr_error;
 125         register_t      ktr_retval;
 126 };
 127
 128 /*
 129  * KTR_NAMEI - namei record
 130  */
 131 #define KTR_NAMEI       3
 132         /* record contains pathname */
 133
 134 /*
 135  * KTR_GENIO - trace generic process i/o
 136  */
 137 #define KTR_GENIO       4
 138 struct ktr_genio {
 139         int     ktr_fd;
 140         enum    uio_rw ktr_rw;
 141         /*
 142          * followed by data successfully read/written
 143          */
 144 };
 145
 146 /*
 147  * KTR_PSIG - trace processed signal
 148  */
 149 #define KTR_PSIG        5
 150 struct ktr_psig {
 151         int     signo;
 152         sig_t   action;
 153         int     code;
 154         sigset_t mask;
 155 };
 156
 157 /*
 158  * KTR_CSW - trace context switches
 159  */
 160 #define KTR_CSW         6
 161 struct ktr_csw {
 162         int     out;    /* 1 if switch out, 0 if switch in */
 163         int     user;   /* 1 if usermode (ivcsw), 0 if kernel (vcsw) */
 164 };
 165
 166 /*
 167  * KTR_USER - data comming from userland
 168  */
 169 #define KTR_USER_MAXLEN 2048    /* maximum length of passed data */
 170 #define KTR_USER        7
 171
 172 /*
 173  * kernel trace points (in p_traceflag)
 174  */
 175 #define KTRFAC_MASK     0x00ffffff
 176 #define KTRFAC_SYSCALL  (1<<KTR_SYSCALL)
 177 #define KTRFAC_SYSRET   (1<<KTR_SYSRET)
 178 #define KTRFAC_NAMEI    (1<<KTR_NAMEI)
 179 #define KTRFAC_GENIO    (1<<KTR_GENIO)
 180 #define KTRFAC_PSIG     (1<<KTR_PSIG)
 181 #define KTRFAC_CSW      (1<<KTR_CSW)
 182 #define KTRFAC_USER     (1<<KTR_USER)
 183 /*
 184  * trace flags (also in p_traceflags)
 185  */
 186 #define KTRFAC_ROOT     0x80000000      /* root set this trace */
 187 #define KTRFAC_INHERIT  0x40000000      /* pass trace flags to children */
 188 #define KTRFAC_ACTIVE   0x20000000      /* ktrace logging in progress, ignore */
 189
 190 #ifdef  _KERNEL
 191 void    ktrnamei (struct lwp *,char *);
 192 void    ktrcsw (struct lwp *,int,int);
 193 void    ktrpsig (struct lwp *, int, sig_t, sigset_t *, int);
 194 void    ktrgenio (struct lwp *, int, enum uio_rw, struct uio *, int);
 195 void    ktrsyscall (struct lwp *, int, int narg, register_t args[]);
 196 void    ktrsysret (struct lwp *, int, int, register_t);
 197 void    ktrdestroy (struct ktrace_node **);
 198 struct ktrace_node *ktrinherit (struct ktrace_node *);
 199
 200 #else
 201
 202 #include <sys/cdefs.h>
 203
 204 __BEGIN_DECLS
 205 int     ktrace (const char *, int, int, pid_t);
 206 int     utrace (const void *, size_t);
 207 __END_DECLS
 208
 209 #endif
 210
 211 #endif