97 lines
2.6 KiB
C
97 lines
2.6 KiB
C
/* $OpenBSD: db_trap.c,v 1.30 2019/11/06 07:30:08 mpi Exp $ */
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/* $NetBSD: db_trap.c,v 1.9 1996/02/05 01:57:18 christos Exp $ */
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/*
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* Mach Operating System
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* Copyright (c) 1993,1992,1991,1990 Carnegie Mellon University
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* All Rights Reserved.
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*
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* Permission to use, copy, modify and distribute this software and its
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* documentation is hereby granted, provided that both the copyright
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* notice and this permission notice appear in all copies of the
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* software, derivative works or modified versions, and any portions
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* thereof, and that both notices appear in supporting documentation.
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*
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* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
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* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
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* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
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*
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* Carnegie Mellon requests users of this software to return to
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*
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* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
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* School of Computer Science
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* Carnegie Mellon University
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* Pittsburgh PA 15213-3890
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*
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* any improvements or extensions that they make and grant Carnegie Mellon
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* the rights to redistribute these changes.
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*
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* Author: David B. Golub, Carnegie Mellon University
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* Date: 7/90
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*/
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/*
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* Trap entry point to kernel debugger.
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <machine/db_machdep.h>
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#include <ddb/db_run.h>
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#include <ddb/db_command.h>
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#include <ddb/db_output.h>
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#include <ddb/db_sym.h>
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#include <ddb/db_extern.h>
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#include <ddb/db_interface.h>
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#include <ddb/db_var.h>
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void
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db_trap(int type, int code)
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{
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int bkpt;
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int watchpt;
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bkpt = IS_BREAKPOINT_TRAP(type, code);
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watchpt = IS_WATCHPOINT_TRAP(type, code);
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if (db_stop_at_pc(&ddb_regs, &bkpt)) {
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if (db_inst_count) {
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db_printf("After %d instructions\n", db_inst_count);
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}
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if (bkpt)
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db_printf("Breakpoint at\t");
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else if (watchpt)
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db_printf("Watchpoint at\t");
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else
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db_printf("Stopped at\t");
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db_dot = PC_REGS(&ddb_regs);
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db_print_loc_and_inst(db_dot);
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if (panicstr != NULL) {
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static int ddb_msg_shown;
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if (! ddb_msg_shown) {
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/* show on-proc threads */
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db_show_all_procs(0, 0, 0, "o");
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}
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/* then the backtrace */
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db_stack_trace_print(db_dot, 0, 14 /* arbitrary */, "",
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db_printf);
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if (db_print_position() != 0)
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db_printf("\n");
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if (! ddb_msg_shown) {
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db_printf(
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"https://www.openbsd.org/ddb.html describes the minimum info required in bug\n"
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"reports. Insufficient info makes it difficult to find and fix bugs.\n");
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ddb_msg_shown = 1;
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}
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}
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db_command_loop();
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}
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db_restart_at_pc(&ddb_regs, watchpt);
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}
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