FreeBSD/Linux Kernel Cross Reference
sys/sys/ktrace.h

     /*
      * Copyright (c) 1988, 1993
      *      The Regents of the University of California.  All rights reserved.
      *
      * Redistribution and use in source and binary forms, with or without
      * modification, are permitted provided that the following conditions
      * are met:
      * 1. Redistributions of source code must retain the above copyright
      *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     * 3. All advertising materials mentioning features or use of this software
     *    must display the following acknowledgement:
     *      This product includes software developed by the University of
     *      California, Berkeley and its contributors.
     * 4. Neither the name of the University nor the names of its contributors
     *    may be used to endorse or promote products derived from this software
     *    without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     *
     *      @(#)ktrace.h    8.1 (Berkeley) 6/2/93
     * $FreeBSD: releng/5.0/sys/sys/ktrace.h 97993 2002-06-07 05:32:59Z jhb $
     */
    
    #ifndef _SYS_KTRACE_H_
    #define _SYS_KTRACE_H_
    
    /*
     * operations to ktrace system call  (KTROP(op))
     */
    #define KTROP_SET               0       /* set trace points */
    #define KTROP_CLEAR             1       /* clear trace points */
    #define KTROP_CLEARFILE         2       /* stop all tracing to file */
    #define KTROP(o)                ((o)&3) /* macro to extract operation */
    /*
     * flags (ORed in with operation)
     */
    #define KTRFLAG_DESCEND         4       /* perform op on all children too */
    
    /*
     * ktrace record header
     */
    struct ktr_header {
            int     ktr_len;                /* length of buf */
            short   ktr_type;               /* trace record type */
            pid_t   ktr_pid;                /* process id */
            char    ktr_comm[MAXCOMLEN+1];  /* command name */
            struct  timeval ktr_time;       /* timestamp */
            void    *ktr_buffer;
    };
    
    /*
     * Test for kernel trace point (MP SAFE).
     *
     * KTRCHECK() just checks that the type is enabled and is only for
     * internal use in the ktrace subsystem.  KTRPOINT() checks against
     * ktrace recursion as well as checking that the type is enabled and
     * is the public interface.
     */
    #define KTRCHECK(td, type)      ((td)->td_proc->p_traceflag & (1 << type))
    #define KTRPOINT(td, type)      (KTRCHECK((td), (type)) && !(td)->td_inktrace)
    
    /*
     * ktrace record types
     */
    
    /*
     * KTR_SYSCALL - system call record
     */
    #define KTR_SYSCALL     1
    struct ktr_syscall {
            short   ktr_code;               /* syscall number */
            short   ktr_narg;               /* number of arguments */
            /*
             * followed by ktr_narg register_t
             */
            register_t      ktr_args[1];
    };
    
    /*
     * KTR_SYSRET - return from system call record
     */
    #define KTR_SYSRET      2
    struct ktr_sysret {
            short   ktr_code;
            short   ktr_eosys;
            int     ktr_error;
           register_t      ktr_retval;
   };
   
   /*
    * KTR_NAMEI - namei record
    */
   #define KTR_NAMEI       3
           /* record contains pathname */
   
   /*
    * KTR_GENIO - trace generic process i/o
    */
   #define KTR_GENIO       4
   struct ktr_genio {
           int     ktr_fd;
           enum    uio_rw ktr_rw;
           /*
            * followed by data successfully read/written
            */
   };
   
   /*
    * KTR_PSIG - trace processed signal
    */
   #define KTR_PSIG        5
   struct ktr_psig {
           int     signo;
           sig_t   action;
           int     code;
           sigset_t mask;
   };
   
   /*
    * KTR_CSW - trace context switches
    */
   #define KTR_CSW         6
   struct ktr_csw {
           int     out;    /* 1 if switch out, 0 if switch in */
           int     user;   /* 1 if usermode (ivcsw), 0 if kernel (vcsw) */
   };
   
   /*
    * KTR_USER - data comming from userland
    */
   #define KTR_USER_MAXLEN 2048    /* maximum length of passed data */
   #define KTR_USER        7
   
   /*
    * kernel trace points (in p_traceflag)
    */
   #define KTRFAC_MASK     0x00ffffff
   #define KTRFAC_SYSCALL  (1<<KTR_SYSCALL)
   #define KTRFAC_SYSRET   (1<<KTR_SYSRET)
   #define KTRFAC_NAMEI    (1<<KTR_NAMEI)
   #define KTRFAC_GENIO    (1<<KTR_GENIO)
   #define KTRFAC_PSIG     (1<<KTR_PSIG)
   #define KTRFAC_CSW      (1<<KTR_CSW)
   #define KTRFAC_USER     (1<<KTR_USER)
   /*
    * trace flags (also in p_traceflags)
    */
   #define KTRFAC_ROOT     0x80000000      /* root set this trace */
   #define KTRFAC_INHERIT  0x40000000      /* pass trace flags to children */
   
   #ifdef  _KERNEL
   extern struct mtx ktrace_mtx;
   
   void    ktrnamei(char *);
   void    ktrcsw(int, int);
   void    ktrpsig(int, sig_t, sigset_t *, int);
   void    ktrgenio(int, enum uio_rw, struct uio *, int);
   void    ktrsyscall(int, int narg, register_t args[]);
   void    ktrsysret(int, int, register_t);
   
   #else
   
   #include <sys/cdefs.h>
   
   __BEGIN_DECLS
   int     ktrace(const char *, int, int, pid_t);
   int     utrace(const void *, size_t);
   __END_DECLS
   
   #endif
   
   #endif

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