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Annotation of sys/dev/raidframe/rf_debugprint.c, Revision 1.1

1.1     ! nbrk        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: }