src/target/trace.c

   1 /***************************************************************************
   2  *   Copyright (C) 2005, 2007 by Dominic Rath                              *
   3  *   Dominic.Rath@gmx.de                                                   *
   4  *                                                                         *
   5  *   This program is free software; you can redistribute it and/or modify  *
   6  *   it under the terms of the GNU General Public License as published by  *
   7  *   the Free Software Foundation; either version 2 of the License, or     *
   8  *   (at your option) any later version.                                   *
   9  *                                                                         *
  10  *   This program is distributed in the hope that it will be useful,       *
  11  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  12  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  13  *   GNU General Public License for more details.                          *
  14  *                                                                         *
  15  *   You should have received a copy of the GNU General Public License     *
  16  *   along with this program; if not, write to the                         *
  17  *   Free Software Foundation, Inc.,                                       *
  18  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
  19  ***************************************************************************/
  20 #ifdef HAVE_CONFIG_H
  21 #include "config.h"
  22 #endif
  23
  24 #include "log.h"
  25 #include "trace.h"
  26 #include "target.h"
  27
  28 int trace_point(target_t *target, u32 number)
  29 {
  30         trace_t *trace = target->trace_info;
  31
  32         LOG_DEBUG("tracepoint: %i", number);
  33
  34         if (number < trace->num_trace_points)
  35                 trace->trace_points[number].hit_counter++;
  36
  37         if (trace->trace_history_size)
  38         {
  39                 trace->trace_history[trace->trace_history_pos++] = number;
  40                 if (trace->trace_history_pos == trace->trace_history_size)
  41                 {
  42                         trace->trace_history_pos = 0;
  43                         trace->trace_history_overflowed = 1;
  44                 }
  45         }
  46
  47         return ERROR_OK;
  48 }
  49
  50 static int handle_trace_point_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
  51 {
  52         target_t *target = get_current_target(cmd_ctx);
  53         trace_t *trace = target->trace_info;
  54
  55         if (argc == 0)
  56         {
  57                 u32 i;
  58
  59                 for (i = 0; i < trace->num_trace_points; i++)
  60                 {
  61                         command_print(cmd_ctx, "trace point 0x%8.8x (%lld times hit)",
  62                                         trace->trace_points[i].address,
  63                                         trace->trace_points[i].hit_counter);
  64                 }
  65
  66                 return ERROR_OK;
  67         }
  68
  69         if (!strcmp(args[0], "clear"))
  70         {
  71                 if (trace->trace_points)
  72                 {
  73                         free(trace->trace_points);
  74                         trace->trace_points = NULL;
  75                 }
  76                 trace->num_trace_points = 0;
  77                 trace->trace_points_size = 0;
  78
  79                 return ERROR_OK;
  80         }
  81
  82         /* resize array if necessary */
  83         if (!trace->trace_points || (trace->trace_points_size == trace->num_trace_points))
  84         {
  85                 trace->trace_points = realloc(trace->trace_points, sizeof(trace_point_t) * (trace->trace_points_size + 32));
  86                 trace->trace_points_size += 32;
  87         }
  88
  89         trace->trace_points[trace->num_trace_points].address = strtoul(args[0], NULL, 0);
  90         trace->trace_points[trace->num_trace_points].hit_counter = 0;
  91         trace->num_trace_points++;
  92
  93         return ERROR_OK;
  94 }
  95
  96 static int handle_trace_history_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
  97 {
  98         target_t *target = get_current_target(cmd_ctx);
  99         trace_t *trace = target->trace_info;
 100
 101         if (argc > 0)
 102         {
 103                 trace->trace_history_pos = 0;
 104                 trace->trace_history_overflowed = 0;
 105
 106                 if (!strcmp(args[0], "clear"))
 107                 {
 108                         /* clearing is implicit, we've just reset position anyway */
 109                         return ERROR_OK;
 110                 }
 111
 112                 if (trace->trace_history)
 113                         free(trace->trace_history);
 114
 115                 trace->trace_history_size = strtoul(args[0], NULL, 0);
 116                 trace->trace_history = malloc(sizeof(u32) * trace->trace_history_size);
 117
 118                 command_print(cmd_ctx, "new trace history size: %i", trace->trace_history_size);
 119         }
 120         else
 121         {
 122                 u32 i;
 123                 u32 first = 0;
 124                 u32 last = trace->trace_history_pos;
 125
 126                 if ( !trace->trace_history_size ) {
 127                         command_print(cmd_ctx, "trace history buffer is not allocated");
 128                         return ERROR_OK;
 129                 }
 130                 if (trace->trace_history_overflowed)
 131                 {
 132                         first = trace->trace_history_pos;
 133                         last = trace->trace_history_pos - 1;
 134                 }
 135
 136                 for (i = first; (i % trace->trace_history_size) != last; i++)
 137                 {
 138                         if (trace->trace_history[i % trace->trace_history_size] < trace->num_trace_points)
 139                         {
 140                                 u32 address;
 141                                 address = trace->trace_points[trace->trace_history[i % trace->trace_history_size]].address;
 142                                 command_print(cmd_ctx, "trace point %i: 0x%8.8x",
 143                                         trace->trace_history[i % trace->trace_history_size],
 144                                         address);
 145                         }
 146
 147                         else
 148                         {
 149                                 command_print(cmd_ctx, "trace point %i: -not defined-", trace->trace_history[i % trace->trace_history_size]);
 150                         }
 151                 }
 152         }
 153
 154         return ERROR_OK;
 155 }
 156
 157 int trace_register_commands(struct command_context_s *cmd_ctx)
 158 {
 159         command_t *trace_cmd =
 160                 register_command(cmd_ctx, NULL, "trace", NULL, COMMAND_ANY, "trace commands");
 161
 162         register_command(cmd_ctx, trace_cmd, "history", handle_trace_history_command,
 163                 COMMAND_EXEC, "display trace history, ['clear'] history or set [size]");
 164
 165         register_command(cmd_ctx, trace_cmd, "point", handle_trace_point_command,
 166                 COMMAND_EXEC, "display trace points, ['clear'] list of trace points, or add new tracepoint at [address]");
 167
 168         return ERROR_OK;
 169 }