dev/raidframe/rf_debugprint.c

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This source file includes following definitions.
rf_ConfigureDebugPrint
rf_clear_debug_print_buffer
rf_debug_printf
rf_print_debug_buffer
rf_spill_debug_buffer
    1 /*      $OpenBSD: rf_debugprint.c,v 1.3 2002/12/16 07:01:03 tdeval Exp $        */
    2 /*      $NetBSD: rf_debugprint.c,v 1.3 1999/02/05 00:06:08 oster Exp $  */
    3 
    4 /*
    5  * Copyright (c) 1995 Carnegie-Mellon University.
    6  * All rights reserved.
    7  *
    8  * Author: Mark Holland
    9  *
   10  * Permission to use, copy, modify and distribute this software and
   11  * its documentation is hereby granted, provided that both the copyright
   12  * notice and this permission notice appear in all copies of the
   13  * software, derivative works or modified versions, and any portions
   14  * thereof, and that both notices appear in supporting documentation.
   15  *
   16  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
   17  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
   18  * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
   19  *
   20  * Carnegie Mellon requests users of this software to return to
   21  *
   22  *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
   23  *  School of Computer Science
   24  *  Carnegie Mellon University
   25  *  Pittsburgh PA 15213-3890
   26  *
   27  * any improvements or extensions that they make and grant Carnegie the
   28  * rights to redistribute these changes.
   29  */
   30 
   31 /*
   32  * Code to do debug printfs. Calls to rf_debug_printf cause the corresponding
   33  * information to be printed to a circular buffer rather than the screen.
   34  * The point is to try and minimize the timing variations induced by the
   35  * printfs, and to capture only the printf's immediately preceding a failure.
   36  */
   37 
   38 #include "rf_types.h"
   39 #include "rf_threadstuff.h"
   40 #include "rf_debugprint.h"
   41 #include "rf_general.h"
   42 #include "rf_options.h"
   43 
   44 #include <sys/param.h>
   45 
   46 struct RF_Entry_s {
   47         char    *cstring;
   48         void    *a1, *a2, *a3, *a4, *a5, *a6, *a7, *a8;
   49 };
   50 
   51 /* space for 1k lines */
   52 #define BUFSHIFT                   10
   53 #define BUFSIZE         (1<<BUFSHIFT)
   54 #define BUFMASK           (BUFSIZE-1)
   55 
   56 static struct RF_Entry_s rf_debugprint_buf[BUFSIZE];
   57 static int rf_debugprint_index = 0;
   58 RF_DECLARE_STATIC_MUTEX(rf_debug_print_mutex);
   59 
   60 int
   61 rf_ConfigureDebugPrint(RF_ShutdownList_t **listp)
   62 {
   63         int rc;
   64 
   65         rc = rf_create_managed_mutex(listp, &rf_debug_print_mutex);
   66         if (rc) {
   67                 RF_ERRORMSG3("Unable to init mutex file %s line %d rc=%d\n",
   68                     __FILE__, __LINE__, rc);
   69                 return (rc);
   70         }
   71 
   72         rf_clear_debug_print_buffer();
   73         return (0);
   74 }
   75 
   76 void
   77 rf_clear_debug_print_buffer(void)
   78 {
   79         int i;
   80 
   81         for (i = 0; i < BUFSIZE; i++)
   82                 rf_debugprint_buf[i].cstring = NULL;
   83         rf_debugprint_index = 0;
   84 }
   85 
   86 void
   87 rf_debug_printf(char *s, void *a1, void *a2, void *a3, void *a4, void *a5,
   88     void *a6, void *a7, void *a8)
   89 {
   90         int idx;
   91 
   92         if (rf_debugPrintUseBuffer) {
   93 
   94                 RF_LOCK_MUTEX(rf_debug_print_mutex);
   95                 idx = rf_debugprint_index;
   96                 rf_debugprint_index = (rf_debugprint_index + 1) & BUFMASK;
   97                 RF_UNLOCK_MUTEX(rf_debug_print_mutex);
   98 
   99                 rf_debugprint_buf[idx].cstring = s;
  100                 rf_debugprint_buf[idx].a1 = a1;
  101                 rf_debugprint_buf[idx].a2 = a2;
  102                 rf_debugprint_buf[idx].a3 = a3;
  103                 rf_debugprint_buf[idx].a4 = a4;
  104                 rf_debugprint_buf[idx].a5 = a5;
  105                 rf_debugprint_buf[idx].a6 = a6;
  106                 rf_debugprint_buf[idx].a7 = a7;
  107                 rf_debugprint_buf[idx].a8 = a8;
  108         } else {
  109                 printf(s, a1, a2, a3, a4, a5, a6, a7, a8);
  110         }
  111 }
  112 
  113 void
  114 rf_print_debug_buffer(void)
  115 {
  116         rf_spill_debug_buffer(NULL);
  117 }
  118 
  119 void
  120 rf_spill_debug_buffer(char *fname)
  121 {
  122         int i;
  123 
  124         if (!rf_debugPrintUseBuffer)
  125                 return;
  126 
  127         RF_LOCK_MUTEX(rf_debug_print_mutex);
  128 
  129         for (i = rf_debugprint_index + 1; i != rf_debugprint_index;
  130              i = (i + 1) & BUFMASK)
  131                 if (rf_debugprint_buf[i].cstring)
  132                         printf(rf_debugprint_buf[i].cstring,
  133                             rf_debugprint_buf[i].a1, rf_debugprint_buf[i].a2,
  134                             rf_debugprint_buf[i].a3, rf_debugprint_buf[i].a4,
  135                             rf_debugprint_buf[i].a5, rf_debugprint_buf[i].a6,
  136                             rf_debugprint_buf[i].a7, rf_debugprint_buf[i].a8);
  137 
  138         printf(rf_debugprint_buf[i].cstring,
  139             rf_debugprint_buf[i].a1, rf_debugprint_buf[i].a2,
  140             rf_debugprint_buf[i].a3, rf_debugprint_buf[i].a4,
  141             rf_debugprint_buf[i].a5, rf_debugprint_buf[i].a6,
  142             rf_debugprint_buf[i].a7, rf_debugprint_buf[i].a8);
  143 
  144         RF_UNLOCK_MUTEX(rf_debug_print_mutex);
  145 }
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root/dev/raidframe/rf_debugprint.c

DEFINITIONS
