IABSD.fr/src/sys/ddb/db_trap.c

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• Author : mpi
  Date : 2019-11-06 07:30:08
  Hash : 8383b4f2
  Message : Substitute boolean_t/TRUE/FALSE by int/1/0. ok dlg@, jasper@, anton@

• sys/ddb/db_trap.c

• /*	$OpenBSD: db_trap.c,v 1.30 2019/11/06 07:30:08 mpi Exp $	*/
  /*	$NetBSD: db_trap.c,v 1.9 1996/02/05 01:57:18 christos Exp $	*/
  
  /*
   * Mach Operating System
   * Copyright (c) 1993,1992,1991,1990 Carnegie Mellon University
   * All Rights Reserved.
   *
   * 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 Mellon
   * the rights to redistribute these changes.
   *
   * 	Author: David B. Golub, Carnegie Mellon University
   *	Date:	7/90
   */
  
  /*
   * Trap entry point to kernel debugger.
   */
  #include <sys/param.h>
  #include <sys/systm.h>
  
  #include <machine/db_machdep.h>
  
  #include <ddb/db_run.h>
  #include <ddb/db_command.h>
  #include <ddb/db_output.h>
  #include <ddb/db_sym.h>
  #include <ddb/db_extern.h>
  #include <ddb/db_interface.h>
  #include <ddb/db_var.h>
  
  void
  db_trap(int type, int code)
  {
  	int	bkpt;
  	int	watchpt;
  
  	bkpt = IS_BREAKPOINT_TRAP(type, code);
  	watchpt = IS_WATCHPOINT_TRAP(type, code);
  
  	if (db_stop_at_pc(&ddb_regs, &bkpt)) {
  		if (db_inst_count) {
  			db_printf("After %d instructions\n", db_inst_count);
  		}
  		if (bkpt)
  			db_printf("Breakpoint at\t");
  		else if (watchpt)
  			db_printf("Watchpoint at\t");
  		else
  			db_printf("Stopped at\t");
  		db_dot = PC_REGS(&ddb_regs);
  		db_print_loc_and_inst(db_dot);
  
  		if (panicstr != NULL) {
  			static int ddb_msg_shown;
  
  			if (! ddb_msg_shown) {
  				/* show on-proc threads */
  				db_show_all_procs(0, 0, 0, "o");
  			}
  			/* then the backtrace */
  			db_stack_trace_print(db_dot, 0, 14 /* arbitrary */, "",
  			    db_printf);
  
  			if (db_print_position() != 0)
  				db_printf("\n");
  			if (! ddb_msg_shown) {
  				db_printf(
  "https://www.openbsd.org/ddb.html describes the minimum info required in bug\n"
  "reports.  Insufficient info makes it difficult to find and fix bugs.\n");
  				ddb_msg_shown = 1;
  			}
  		}
  
  		db_command_loop();
  	}
  
  	db_restart_at_pc(&ddb_regs, watchpt);
  }