/* $OpenBSD: rf_debugprint.c,v 1.3 2002/12/16 07:01:03 tdeval Exp $ */ /* $NetBSD: rf_debugprint.c,v 1.3 1999/02/05 00:06:08 oster Exp $ */ /* * Copyright (c) 1995 Carnegie-Mellon University. * All rights reserved. * * Author: Mark Holland * * Permission to use, copy, modify and distribute this software and * its documentation is hereby granted, provided that both the copyright * notice and this permission notice appear in all copies of the * software, derivative works or modified versions, and any portions * thereof, and that both notices appear in supporting documentation. * * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. * * Carnegie Mellon requests users of this software to return to * * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU * School of Computer Science * Carnegie Mellon University * Pittsburgh PA 15213-3890 * * any improvements or extensions that they make and grant Carnegie the * rights to redistribute these changes. */ /* * Code to do debug printfs. Calls to rf_debug_printf cause the corresponding * information to be printed to a circular buffer rather than the screen. * The point is to try and minimize the timing variations induced by the * printfs, and to capture only the printf's immediately preceding a failure. */ #include "rf_types.h" #include "rf_threadstuff.h" #include "rf_debugprint.h" #include "rf_general.h" #include "rf_options.h" #include <sys/param.h> struct RF_Entry_s { char *cstring; void *a1, *a2, *a3, *a4, *a5, *a6, *a7, *a8; }; /* space for 1k lines */ #define BUFSHIFT 10 #define BUFSIZE (1<<BUFSHIFT) #define BUFMASK (BUFSIZE-1) static struct RF_Entry_s rf_debugprint_buf[BUFSIZE]; static int rf_debugprint_index = 0; RF_DECLARE_STATIC_MUTEX(rf_debug_print_mutex); int rf_ConfigureDebugPrint(RF_ShutdownList_t **listp) { int rc; rc = rf_create_managed_mutex(listp, &rf_debug_print_mutex); if (rc) { RF_ERRORMSG3("Unable to init mutex file %s line %d rc=%d\n", __FILE__, __LINE__, rc); return (rc); } rf_clear_debug_print_buffer(); return (0); } void rf_clear_debug_print_buffer(void) { int i; for (i = 0; i < BUFSIZE; i++) rf_debugprint_buf[i].cstring = NULL; rf_debugprint_index = 0; } void rf_debug_printf(char *s, void *a1, void *a2, void *a3, void *a4, void *a5, void *a6, void *a7, void *a8) { int idx; if (rf_debugPrintUseBuffer) { RF_LOCK_MUTEX(rf_debug_print_mutex); idx = rf_debugprint_index; rf_debugprint_index = (rf_debugprint_index + 1) & BUFMASK; RF_UNLOCK_MUTEX(rf_debug_print_mutex); rf_debugprint_buf[idx].cstring = s; rf_debugprint_buf[idx].a1 = a1; rf_debugprint_buf[idx].a2 = a2; rf_debugprint_buf[idx].a3 = a3; rf_debugprint_buf[idx].a4 = a4; rf_debugprint_buf[idx].a5 = a5; rf_debugprint_buf[idx].a6 = a6; rf_debugprint_buf[idx].a7 = a7; rf_debugprint_buf[idx].a8 = a8; } else { printf(s, a1, a2, a3, a4, a5, a6, a7, a8); } } void rf_print_debug_buffer(void) { rf_spill_debug_buffer(NULL); } void rf_spill_debug_buffer(char *fname) { int i; if (!rf_debugPrintUseBuffer) return; RF_LOCK_MUTEX(rf_debug_print_mutex); for (i = rf_debugprint_index + 1; i != rf_debugprint_index; i = (i + 1) & BUFMASK) if (rf_debugprint_buf[i].cstring) printf(rf_debugprint_buf[i].cstring, rf_debugprint_buf[i].a1, rf_debugprint_buf[i].a2, rf_debugprint_buf[i].a3, 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); printf(rf_debugprint_buf[i].cstring, rf_debugprint_buf[i].a1, rf_debugprint_buf[i].a2, rf_debugprint_buf[i].a3, 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); RF_UNLOCK_MUTEX(rf_debug_print_mutex); }