test/debug/ksyscalls.c

   1 /*
   2  * KSYSCALLS.C
   3  *
   4  * cc -I/usr/src/sys ksyscalls.c -o /usr/local/bin/ksyscalls -lkvm
   5  *
   6  * Dump syscall debugging info
   7  *
   8  * Copyright (c) 2011 The DragonFly Project.  All rights reserved.
   9  *
  10  * This code is derived from software contributed to The DragonFly Project
  11  * by Matthew Dillon <dillon@backplane.com>
  12  *
  13  * Redistribution and use in source and binary forms, with or without
  14  * modification, are permitted provided that the following conditions
  15  * are met:
  16  *
  17  * 1. Redistributions of source code must retain the above copyright
  18  *    notice, this list of conditions and the following disclaimer.
  19  * 2. Redistributions in binary form must reproduce the above copyright
  20  *    notice, this list of conditions and the following disclaimer in
  21  *    the documentation and/or other materials provided with the
  22  *    distribution.
  23  * 3. Neither the name of The DragonFly Project nor the names of its
  24  *    contributors may be used to endorse or promote products derived
  25  *    from this software without specific, prior written permission.
  26  *
  27  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  28  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  29  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  30  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE
  31  * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  32  * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
  33  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  34  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
  35  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  36  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
  37  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  38  * SUCH DAMAGE.
  39  */
  40
  41 #define _KERNEL_STRUCTURES_
  42 #include <sys/param.h>
  43 #include <sys/user.h>
  44 #include <sys/malloc.h>
  45 #include <sys/signalvar.h>
  46 #include <sys/vnode.h>
  47 #include <sys/namecache.h>
  48 #include <sys/syscall.h>
  49
  50 #include <vm/vm.h>
  51 #include <vm/vm_page.h>
  52 #include <vm/vm_kern.h>
  53 #include <vm/vm_page.h>
  54 #include <vm/vm_object.h>
  55 #include <vm/vm_map.h>
  56 #include <vm/swap_pager.h>
  57 #include <vm/vnode_pager.h>
  58
  59 #include <stdio.h>
  60 #include <stdlib.h>
  61 #include <string.h>
  62 #include <fcntl.h>
  63 #include <kvm.h>
  64 #include <nlist.h>
  65 #include <getopt.h>
  66
  67 struct nlist Nl[] = {
  68     { "_SysCallsWorstCase" },
  69     { NULL }
  70 };
  71
  72 static void kkread(kvm_t *kd, u_long addr, void *buf, size_t nbytes);
  73
  74 int
  75 main(int ac, char **av)
  76 {
  77     const char *corefile = NULL;
  78     const char *sysfile = NULL;
  79     kvm_t *kd;
  80     int ch;
  81     int i;
  82     uint64_t syscallsworstcase[SYS_MAXSYSCALL];
  83
  84     while ((ch = getopt(ac, av, "M:N:")) != -1) {
  85         switch(ch) {
  86         case 'M':
  87             corefile = optarg;
  88             break;
  89         case 'N':
  90             sysfile = optarg;
  91             break;
  92         default:
  93             fprintf(stderr, "%s [-M core] [-N system]\n", av[0]);
  94             exit(1);
  95         }
  96     }
  97     ac -= optind;
  98     av += optind;
  99
 100     if ((kd = kvm_open(sysfile, corefile, NULL, O_RDONLY, "kvm:")) == NULL) {
 101         perror("kvm_open");
 102         exit(1);
 103     }
 104     if (kvm_nlist(kd, Nl) != 0) {
 105         perror("kvm_nlist");
 106         exit(1);
 107     }
 108     kkread(kd, Nl[0].n_value, syscallsworstcase, sizeof(syscallsworstcase));
 109
 110     for (i = 0; i < SYS_MAXSYSCALL; ++i) {
 111         if (syscallsworstcase[i])
 112                 printf("call %3d %6jduS\n", i, (intmax_t)syscallsworstcase[i]);
 113     }
 114 }
 115
 116 static void
 117 kkread(kvm_t *kd, u_long addr, void *buf, size_t nbytes)
 118 {
 119     if (kvm_read(kd, addr, buf, nbytes) != nbytes) {
 120         perror("kvm_read");
 121         exit(1);
 122     }
 123 }