1 /* $NetBSD: rf_debugprint.c,v 1.4 2001/10/04 15:58:52 oster Exp $ */ 2 /* 3 * Copyright (c) 1995 Carnegie-Mellon University. 4 * All rights reserved. 5 * 6 * Author: Mark Holland 7 * 8 * Permission to use, copy, modify and distribute this software and 9 * its documentation is hereby granted, provided that both the copyright 10 * notice and this permission notice appear in all copies of the 11 * software, derivative works or modified versions, and any portions 12 * thereof, and that both notices appear in supporting documentation. 13 * 14 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 15 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND 16 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 17 * 18 * Carnegie Mellon requests users of this software to return to 19 * 20 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU 21 * School of Computer Science 22 * Carnegie Mellon University 23 * Pittsburgh PA 15213-3890 24 * 25 * any improvements or extensions that they make and grant Carnegie the 26 * rights to redistribute these changes. 27 */ 28 29 /* 30 * Code to do debug printfs. Calls to rf_debug_printf cause the corresponding 31 * information to be printed to a circular buffer rather than the screen. 32 * The point is to try and minimize the timing variations induced by the 33 * printfs, and to capture only the printf's immediately preceding a failure. 34 */ 35 36 #include <dev/raidframe/raidframevar.h> 37 38 #include "rf_threadstuff.h" 39 #include "rf_debugprint.h" 40 #include "rf_general.h" 41 #include "rf_options.h" 42 43 #include <sys/param.h> 44 45 struct RF_Entry_s { 46 char *cstring; 47 void *a1, *a2, *a3, *a4, *a5, *a6, *a7, *a8; 48 }; 49 /* space for 1k lines */ 50 #define BUFSHIFT 10 51 #define BUFSIZE (1<<BUFSHIFT) 52 #define BUFMASK (BUFSIZE-1) 53 54 static struct RF_Entry_s rf_debugprint_buf[BUFSIZE]; 55 static int rf_debugprint_index = 0; 56 RF_DECLARE_STATIC_MUTEX(rf_debug_print_mutex) 57 int rf_ConfigureDebugPrint(listp) 58 RF_ShutdownList_t **listp; 59 { 60 int rc; 61 62 rc = rf_create_managed_mutex(listp, &rf_debug_print_mutex); 63 if (rc) { 64 RF_ERRORMSG3("Unable to init mutex file %s line %d rc=%d\n", __FILE__, 65 __LINE__, rc); 66 return (rc); 67 } 68 rf_clear_debug_print_buffer(); 69 return (0); 70 } 71 72 void 73 rf_clear_debug_print_buffer() 74 { 75 int i; 76 77 for (i = 0; i < BUFSIZE; i++) 78 rf_debugprint_buf[i].cstring = NULL; 79 rf_debugprint_index = 0; 80 } 81 82 void 83 rf_debug_printf(s, a1, a2, a3, a4, a5, a6, a7, a8) 84 char *s; 85 void *a1, *a2, *a3, *a4, *a5, *a6, *a7, *a8; 86 { 87 int idx; 88 89 if (rf_debugPrintUseBuffer) { 90 91 RF_LOCK_MUTEX(rf_debug_print_mutex); 92 idx = rf_debugprint_index; 93 rf_debugprint_index = (rf_debugprint_index + 1) & BUFMASK; 94 RF_UNLOCK_MUTEX(rf_debug_print_mutex); 95 96 rf_debugprint_buf[idx].cstring = s; 97 rf_debugprint_buf[idx].a1 = a1; 98 rf_debugprint_buf[idx].a2 = a2; 99 rf_debugprint_buf[idx].a3 = a3; 100 rf_debugprint_buf[idx].a4 = a4; 101 rf_debugprint_buf[idx].a5 = a5; 102 rf_debugprint_buf[idx].a6 = a6; 103 rf_debugprint_buf[idx].a7 = a7; 104 rf_debugprint_buf[idx].a8 = a8; 105 } else { 106 printf(s, a1, a2, a3, a4, a5, a6, a7, a8); 107 } 108 } 109 110 void 111 rf_print_debug_buffer() 112 { 113 rf_spill_debug_buffer(NULL); 114 } 115 116 void 117 rf_spill_debug_buffer(fname) 118 char *fname; 119 { 120 int i; 121 122 if (!rf_debugPrintUseBuffer) 123 return; 124 125 RF_LOCK_MUTEX(rf_debug_print_mutex); 126 127 for (i = rf_debugprint_index + 1; i != rf_debugprint_index; i = (i + 1) & BUFMASK) 128 if (rf_debugprint_buf[i].cstring) 129 printf(rf_debugprint_buf[i].cstring, rf_debugprint_buf[i].a1, rf_debugprint_buf[i].a2, rf_debugprint_buf[i].a3, 130 rf_debugprint_buf[i].a4, rf_debugprint_buf[i].a5, rf_debugprint_buf[i].a6, rf_debugprint_buf[i].a7, rf_debugprint_buf[i].a8); 131 printf(rf_debugprint_buf[i].cstring, rf_debugprint_buf[i].a1, rf_debugprint_buf[i].a2, rf_debugprint_buf[i].a3, 132 rf_debugprint_buf[i].a4, rf_debugprint_buf[i].a5, rf_debugprint_buf[i].a6, rf_debugprint_buf[i].a7, rf_debugprint_buf[i].a8); 133 RF_UNLOCK_MUTEX(rf_debug_print_mutex); 134 } 135