programs/winedbg/display.c

   1 /*
   2  * File display.c - display handling for Wine internal debugger.
   3  *
   4  * Copyright (C) 1997, Eric Youngdale.
   5  * Copyright (C) 2003, Michal Miroslaw
   6  *
   7  * This library is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2.1 of the License, or (at your option) any later version.
  11  *
  12  * This library is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with this library; if not, write to the Free Software
  19  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  20  */
  21
  22 #include <stdlib.h>
  23 #include <string.h>
  24
  25 #include "debugger.h"
  26 #include "wine/debug.h"
  27
  28 WINE_DEFAULT_DEBUG_CHANNEL(winedbg);
  29
  30 /* needs to be power of 2, search for MARK to see why :) */
  31 #define DISPTAB_DELTA 8
  32
  33 struct display
  34 {
  35     struct expr*        exp;
  36     int                 count;
  37     char                format;
  38     char                enabled;
  39     char                func_buffer[sizeof(SYMBOL_INFO) + 256];
  40     SYMBOL_INFO*        func;
  41 };
  42
  43 static struct display *displaypoints = NULL;
  44 static unsigned int maxdisplays = 0, ndisplays = 0;
  45
  46 static inline BOOL cmp_symbol(const SYMBOL_INFO* si1, const SYMBOL_INFO* si2)
  47 {
  48     if (si1->NameLen != si2->NameLen) return FALSE;
  49     return !memcmp(si1, si2, sizeof(SYMBOL_INFO) + si1->NameLen);
  50 }
  51
  52 int display_add(struct expr *exp, int count, char format, int in_frame)
  53 {
  54     int                 i;
  55
  56     for (i = 0; i < ndisplays; i++)
  57         if (displaypoints[i].exp == NULL)
  58             break;
  59
  60     if (i == maxdisplays)
  61     {
  62         /* no space left - expand */
  63         maxdisplays += DISPTAB_DELTA;
  64         displaypoints = dbg_heap_realloc(displaypoints,
  65                                          maxdisplays * sizeof(*displaypoints));
  66     }
  67
  68     if (i == ndisplays) ndisplays++;
  69
  70     displaypoints[i].exp           = expr_clone(exp);
  71     displaypoints[i].count         = count;
  72     displaypoints[i].format        = format;
  73     displaypoints[i].enabled       = TRUE;
  74     if (in_frame)
  75     {
  76         displaypoints[i].func = (SYMBOL_INFO*)displaypoints[i].func_buffer;
  77         displaypoints[i].func->SizeOfStruct = sizeof(SYMBOL_INFO);
  78         displaypoints[i].func->MaxNameLen = sizeof(displaypoints[i].func_buffer) -
  79             sizeof(*displaypoints[i].func);
  80         if (!stack_get_frame(displaypoints[i].func, NULL))
  81         {
  82             expr_free(displaypoints[i].exp);
  83             displaypoints[i].exp = NULL;
  84             return FALSE;
  85         }
  86     }
  87     else displaypoints[i].func = NULL;
  88
  89     return TRUE;
  90 }
  91
  92 int display_info(void)
  93 {
  94     int                 i;
  95     char                buffer[sizeof(SYMBOL_INFO) + 256];
  96     SYMBOL_INFO*        func;
  97     const char*         info;
  98
  99     func = (SYMBOL_INFO*)buffer;
 100     func->SizeOfStruct = sizeof(SYMBOL_INFO);
 101     func->MaxNameLen = sizeof(buffer) - sizeof(*func);
 102     if (!stack_get_frame(func, NULL)) return FALSE;
 103
 104     for (i = 0; i < ndisplays; i++)
 105     {
 106         if (displaypoints[i].exp == NULL) continue;
 107
 108         if (displaypoints[i].enabled)
 109         {
 110             if (displaypoints[i].func && !cmp_symbol(displaypoints[i].func, func))
 111                 info = " (out of scope)";
 112             else
 113                 info = "";
 114         }
 115         else
 116             info = " (disabled)";
 117         dbg_printf("%d in %s%s: ",
 118                    i + 1, func ? displaypoints[i].func->Name : "", info);
 119         expr_print(displaypoints[i].exp);
 120         dbg_printf("\n");
 121     }
 122     return TRUE;
 123 }
 124
 125 static void print_one_display(int i)
 126 {
 127     struct dbg_lvalue   lvalue;
 128
 129     if (displaypoints[i].enabled)
 130     {
 131         lvalue = expr_eval(displaypoints[i].exp);
 132         if (lvalue.typeid == dbg_itype_none)
 133         {
 134             dbg_printf("Unable to evaluate expression ");
 135             expr_print(displaypoints[i].exp);
 136             dbg_printf("\nDisabling display %d ...\n", i + 1);
 137             displaypoints[i].enabled = FALSE;
 138             return;
 139         }
 140     }
 141
 142     dbg_printf("%d: ", i + 1);
 143     expr_print(displaypoints[i].exp);
 144     dbg_printf(" = ");
 145     if (!displaypoints[i].enabled)
 146         dbg_printf("(disabled)\n");
 147     else
 148         if (displaypoints[i].format == 'i')
 149             memory_examine(&lvalue, displaypoints[i].count, displaypoints[i].format);
 150         else
 151             print_value(&lvalue, displaypoints[i].format, 0);
 152 }
 153
 154 int display_print(void)
 155 {
 156     int                 i;
 157     char                buffer[sizeof(SYMBOL_INFO) + 256];
 158     SYMBOL_INFO*        func;
 159
 160     func = (SYMBOL_INFO*)buffer;
 161     func->SizeOfStruct = sizeof(SYMBOL_INFO);
 162     func->MaxNameLen = sizeof(buffer) - sizeof(*func);
 163     if (!stack_get_frame(func, NULL)) return FALSE;
 164
 165     for (i = 0; i < ndisplays; i++)
 166     {
 167         if (displaypoints[i].exp == NULL || !displaypoints[i].enabled)
 168             continue;
 169         if (displaypoints[i].func && !cmp_symbol(displaypoints[i].func, func))
 170             continue;
 171         print_one_display(i);
 172     }
 173
 174     return TRUE;
 175 }
 176
 177 int display_delete(int displaynum)
 178 {
 179     int i;
 180
 181     if (displaynum > ndisplays || displaynum == 0 || displaynum < -1 ||
 182         displaypoints[displaynum - 1].exp == NULL)
 183     {
 184         dbg_printf("Invalid display number\n");
 185         return TRUE;
 186     }
 187
 188     if (displaynum == -1)
 189     {
 190         for (i = 0; i < ndisplays; i++)
 191         {
 192             if (displaypoints[i].exp != NULL)
 193             {
 194                 expr_free(displaypoints[i].exp);
 195                 displaypoints[i].exp = NULL;
 196             }
 197         }
 198         maxdisplays = DISPTAB_DELTA;
 199         displaypoints = dbg_heap_realloc(displaypoints,
 200                                          (maxdisplays = DISPTAB_DELTA) * sizeof(*displaypoints));
 201         ndisplays = 0;
 202     }
 203     else if (displaypoints[--displaynum].exp != NULL)
 204     {
 205         expr_free(displaypoints[displaynum].exp);
 206         displaypoints[displaynum].exp = NULL;
 207         while (displaynum == ndisplays - 1 && displaypoints[displaynum].exp == NULL)
 208         {
 209             --ndisplays;
 210             --displaynum;
 211         }
 212         if (maxdisplays - ndisplays >= 2 * DISPTAB_DELTA)
 213         {
 214             /* MARK */
 215             maxdisplays = (ndisplays + DISPTAB_DELTA - 1) & ~(DISPTAB_DELTA - 1);
 216             displaypoints = dbg_heap_realloc(displaypoints,
 217                                              maxdisplays * sizeof(*displaypoints));
 218         }
 219     }
 220     return TRUE;
 221 }
 222
 223 int display_enable(int displaynum, int enable)
 224 {
 225     char                buffer[sizeof(SYMBOL_INFO) + 256];
 226     SYMBOL_INFO*        func;
 227
 228     func = (SYMBOL_INFO*)buffer;
 229     func->SizeOfStruct = sizeof(SYMBOL_INFO);
 230     func->MaxNameLen = sizeof(buffer) - sizeof(*func);
 231     if (!stack_get_frame(func, NULL)) return FALSE;
 232
 233     --displaynum;
 234     if (displaynum >= ndisplays || displaynum < 0 ||
 235         displaypoints[displaynum].exp == NULL)
 236     {
 237         dbg_printf("Invalid display number\n");
 238         return TRUE;
 239     }
 240
 241     displaypoints[displaynum].enabled = enable;
 242     if (!displaypoints[displaynum].func ||
 243         cmp_symbol(displaypoints[displaynum].func, func))
 244     {
 245         print_one_display(displaynum);
 246     }
 247
 248     return TRUE;
 249 }