| 1 | /* TUI display locator. |
| 2 | |
| 3 | Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2006, 2007, 2008, |
| 4 | 2009 Free Software Foundation, Inc. |
| 5 | |
| 6 | Contributed by Hewlett-Packard Company. |
| 7 | |
| 8 | This file is part of GDB. |
| 9 | |
| 10 | This program is free software; you can redistribute it and/or modify |
| 11 | it under the terms of the GNU General Public License as published by |
| 12 | the Free Software Foundation; either version 3 of the License, or |
| 13 | (at your option) any later version. |
| 14 | |
| 15 | This program is distributed in the hope that it will be useful, |
| 16 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 18 | GNU General Public License for more details. |
| 19 | |
| 20 | You should have received a copy of the GNU General Public License |
| 21 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| 22 | |
| 23 | #include "defs.h" |
| 24 | #include "symtab.h" |
| 25 | #include "breakpoint.h" |
| 26 | #include "frame.h" |
| 27 | #include "command.h" |
| 28 | #include "inferior.h" |
| 29 | #include "target.h" |
| 30 | #include "top.h" |
| 31 | #include "gdb_string.h" |
| 32 | #include "tui/tui.h" |
| 33 | #include "tui/tui-data.h" |
| 34 | #include "tui/tui-stack.h" |
| 35 | #include "tui/tui-wingeneral.h" |
| 36 | #include "tui/tui-source.h" |
| 37 | #include "tui/tui-winsource.h" |
| 38 | #include "tui/tui-file.h" |
| 39 | |
| 40 | #include "gdb_curses.h" |
| 41 | |
| 42 | /* Get a printable name for the function at the address. |
| 43 | The symbol name is demangled if demangling is turned on. |
| 44 | Returns a pointer to a static area holding the result. */ |
| 45 | static char *tui_get_function_from_frame (struct frame_info *fi); |
| 46 | |
| 47 | /* Set the filename portion of the locator. */ |
| 48 | static void tui_set_locator_filename (const char *filename); |
| 49 | |
| 50 | /* Update the locator, with the provided arguments. */ |
| 51 | static void tui_set_locator_info (const char *filename, |
| 52 | const char *procname, |
| 53 | int lineno, CORE_ADDR addr); |
| 54 | |
| 55 | static void tui_update_command (char *, int); |
| 56 | \f |
| 57 | |
| 58 | /* Create the status line to display as much information as we can on |
| 59 | this single line: target name, process number, current function, |
| 60 | current line, current PC, SingleKey mode. */ |
| 61 | static char* |
| 62 | tui_make_status_line (struct tui_locator_element *loc) |
| 63 | { |
| 64 | char *string; |
| 65 | char line_buf[50], *pname; |
| 66 | char *buf; |
| 67 | int status_size; |
| 68 | int i, proc_width; |
| 69 | const char *pid_name; |
| 70 | const char *pc_buf; |
| 71 | int target_width; |
| 72 | int pid_width; |
| 73 | int line_width; |
| 74 | int pc_width; |
| 75 | struct ui_file *pc_out; |
| 76 | |
| 77 | if (ptid_equal (inferior_ptid, null_ptid)) |
| 78 | pid_name = "No process"; |
| 79 | else |
| 80 | pid_name = target_pid_to_str (inferior_ptid); |
| 81 | |
| 82 | target_width = strlen (target_shortname); |
| 83 | if (target_width > MAX_TARGET_WIDTH) |
| 84 | target_width = MAX_TARGET_WIDTH; |
| 85 | |
| 86 | pid_width = strlen (pid_name); |
| 87 | if (pid_width > MAX_PID_WIDTH) |
| 88 | pid_width = MAX_PID_WIDTH; |
| 89 | |
| 90 | status_size = tui_term_width (); |
| 91 | string = (char *) xmalloc (status_size + 1); |
| 92 | buf = (char*) alloca (status_size + 1); |
| 93 | |
| 94 | /* Translate line number and obtain its size. */ |
| 95 | if (loc->line_no > 0) |
| 96 | sprintf (line_buf, "%d", loc->line_no); |
| 97 | else |
| 98 | strcpy (line_buf, "??"); |
| 99 | line_width = strlen (line_buf); |
| 100 | if (line_width < MIN_LINE_WIDTH) |
| 101 | line_width = MIN_LINE_WIDTH; |
| 102 | |
| 103 | /* Translate PC address. */ |
| 104 | pc_out = tui_sfileopen (128); |
| 105 | fputs_filtered (paddress (loc->addr), pc_out); |
| 106 | pc_buf = tui_file_get_strbuf (pc_out); |
| 107 | pc_width = strlen (pc_buf); |
| 108 | |
| 109 | /* First determine the amount of proc name width we have available. |
| 110 | The +1 are for a space separator between fields. |
| 111 | The -1 are to take into account the \0 counted by sizeof. */ |
| 112 | proc_width = (status_size |
| 113 | - (target_width + 1) |
| 114 | - (pid_width + 1) |
| 115 | - (sizeof (PROC_PREFIX) - 1 + 1) |
| 116 | - (sizeof (LINE_PREFIX) - 1 + line_width + 1) |
| 117 | - (sizeof (PC_PREFIX) - 1 + pc_width + 1) |
| 118 | - (tui_current_key_mode == TUI_SINGLE_KEY_MODE |
| 119 | ? (sizeof (SINGLE_KEY) - 1 + 1) |
| 120 | : 0)); |
| 121 | |
| 122 | /* If there is no room to print the function name, try by removing |
| 123 | some fields. */ |
| 124 | if (proc_width < MIN_PROC_WIDTH) |
| 125 | { |
| 126 | proc_width += target_width + 1; |
| 127 | target_width = 0; |
| 128 | if (proc_width < MIN_PROC_WIDTH) |
| 129 | { |
| 130 | proc_width += pid_width + 1; |
| 131 | pid_width = 0; |
| 132 | if (proc_width <= MIN_PROC_WIDTH) |
| 133 | { |
| 134 | proc_width += pc_width + sizeof (PC_PREFIX) - 1 + 1; |
| 135 | pc_width = 0; |
| 136 | if (proc_width < 0) |
| 137 | { |
| 138 | proc_width += line_width + sizeof (LINE_PREFIX) - 1 + 1; |
| 139 | line_width = 0; |
| 140 | if (proc_width < 0) |
| 141 | proc_width = 0; |
| 142 | } |
| 143 | } |
| 144 | } |
| 145 | } |
| 146 | |
| 147 | /* Now convert elements to string form. */ |
| 148 | pname = loc->proc_name; |
| 149 | |
| 150 | /* Now create the locator line from the string version of the |
| 151 | elements. We could use sprintf() here but that wouldn't ensure |
| 152 | that we don't overrun the size of the allocated buffer. |
| 153 | strcat_to_buf() will. */ |
| 154 | *string = (char) 0; |
| 155 | |
| 156 | if (target_width > 0) |
| 157 | { |
| 158 | sprintf (buf, "%*.*s ", |
| 159 | -target_width, target_width, target_shortname); |
| 160 | strcat_to_buf (string, status_size, buf); |
| 161 | } |
| 162 | if (pid_width > 0) |
| 163 | { |
| 164 | sprintf (buf, "%*.*s ", |
| 165 | -pid_width, pid_width, pid_name); |
| 166 | strcat_to_buf (string, status_size, buf); |
| 167 | } |
| 168 | |
| 169 | /* Show whether we are in SingleKey mode. */ |
| 170 | if (tui_current_key_mode == TUI_SINGLE_KEY_MODE) |
| 171 | { |
| 172 | strcat_to_buf (string, status_size, SINGLE_KEY); |
| 173 | strcat_to_buf (string, status_size, " "); |
| 174 | } |
| 175 | |
| 176 | /* Procedure/class name. */ |
| 177 | if (proc_width > 0) |
| 178 | { |
| 179 | if (strlen (pname) > proc_width) |
| 180 | sprintf (buf, "%s%*.*s* ", PROC_PREFIX, |
| 181 | 1 - proc_width, proc_width - 1, pname); |
| 182 | else |
| 183 | sprintf (buf, "%s%*.*s ", PROC_PREFIX, |
| 184 | -proc_width, proc_width, pname); |
| 185 | strcat_to_buf (string, status_size, buf); |
| 186 | } |
| 187 | |
| 188 | if (line_width > 0) |
| 189 | { |
| 190 | sprintf (buf, "%s%*.*s ", LINE_PREFIX, |
| 191 | -line_width, line_width, line_buf); |
| 192 | strcat_to_buf (string, status_size, buf); |
| 193 | } |
| 194 | if (pc_width > 0) |
| 195 | { |
| 196 | strcat_to_buf (string, status_size, PC_PREFIX); |
| 197 | strcat_to_buf (string, status_size, pc_buf); |
| 198 | } |
| 199 | |
| 200 | |
| 201 | for (i = strlen (string); i < status_size; i++) |
| 202 | string[i] = ' '; |
| 203 | string[status_size] = (char) 0; |
| 204 | |
| 205 | ui_file_delete (pc_out); |
| 206 | return string; |
| 207 | } |
| 208 | |
| 209 | /* Get a printable name for the function at the address. The symbol |
| 210 | name is demangled if demangling is turned on. Returns a pointer to |
| 211 | a static area holding the result. */ |
| 212 | static char* |
| 213 | tui_get_function_from_frame (struct frame_info *fi) |
| 214 | { |
| 215 | static char name[256]; |
| 216 | struct ui_file *stream = tui_sfileopen (256); |
| 217 | char *p; |
| 218 | |
| 219 | print_address_symbolic (get_frame_pc (fi), stream, demangle, ""); |
| 220 | p = tui_file_get_strbuf (stream); |
| 221 | |
| 222 | /* Use simple heuristics to isolate the function name. The symbol |
| 223 | can be demangled and we can have function parameters. Remove |
| 224 | them because the status line is too short to display them. */ |
| 225 | if (*p == '<') |
| 226 | p++; |
| 227 | strncpy (name, p, sizeof (name)); |
| 228 | p = strchr (name, '('); |
| 229 | if (!p) |
| 230 | p = strchr (name, '>'); |
| 231 | if (p) |
| 232 | *p = 0; |
| 233 | p = strchr (name, '+'); |
| 234 | if (p) |
| 235 | *p = 0; |
| 236 | ui_file_delete (stream); |
| 237 | return name; |
| 238 | } |
| 239 | |
| 240 | void |
| 241 | tui_show_locator_content (void) |
| 242 | { |
| 243 | char *string; |
| 244 | struct tui_gen_win_info *locator; |
| 245 | |
| 246 | locator = tui_locator_win_info_ptr (); |
| 247 | |
| 248 | if (locator != NULL && locator->handle != (WINDOW *) NULL) |
| 249 | { |
| 250 | struct tui_win_element *element; |
| 251 | |
| 252 | element = (struct tui_win_element *) locator->content[0]; |
| 253 | |
| 254 | string = tui_make_status_line (&element->which_element.locator); |
| 255 | wmove (locator->handle, 0, 0); |
| 256 | wstandout (locator->handle); |
| 257 | waddstr (locator->handle, string); |
| 258 | wclrtoeol (locator->handle); |
| 259 | wstandend (locator->handle); |
| 260 | tui_refresh_win (locator); |
| 261 | wmove (locator->handle, 0, 0); |
| 262 | xfree (string); |
| 263 | locator->content_in_use = TRUE; |
| 264 | } |
| 265 | } |
| 266 | |
| 267 | |
| 268 | /* Set the filename portion of the locator. */ |
| 269 | static void |
| 270 | tui_set_locator_filename (const char *filename) |
| 271 | { |
| 272 | struct tui_gen_win_info *locator = tui_locator_win_info_ptr (); |
| 273 | struct tui_locator_element *element; |
| 274 | |
| 275 | if (locator->content[0] == NULL) |
| 276 | { |
| 277 | tui_set_locator_info (filename, NULL, 0, 0); |
| 278 | return; |
| 279 | } |
| 280 | |
| 281 | element = &((struct tui_win_element *) locator->content[0])->which_element.locator; |
| 282 | element->file_name[0] = 0; |
| 283 | strcat_to_buf (element->file_name, MAX_LOCATOR_ELEMENT_LEN, filename); |
| 284 | } |
| 285 | |
| 286 | /* Update the locator, with the provided arguments. */ |
| 287 | static void |
| 288 | tui_set_locator_info (const char *filename, |
| 289 | const char *procname, |
| 290 | int lineno, |
| 291 | CORE_ADDR addr) |
| 292 | { |
| 293 | struct tui_gen_win_info *locator = tui_locator_win_info_ptr (); |
| 294 | struct tui_locator_element *element; |
| 295 | |
| 296 | /* Allocate the locator content if necessary. */ |
| 297 | if (locator->content_size <= 0) |
| 298 | { |
| 299 | locator->content = (void **) tui_alloc_content (1, locator->type); |
| 300 | locator->content_size = 1; |
| 301 | } |
| 302 | |
| 303 | element = &((struct tui_win_element *) locator->content[0])->which_element.locator; |
| 304 | element->proc_name[0] = (char) 0; |
| 305 | strcat_to_buf (element->proc_name, MAX_LOCATOR_ELEMENT_LEN, procname); |
| 306 | element->line_no = lineno; |
| 307 | element->addr = addr; |
| 308 | tui_set_locator_filename (filename); |
| 309 | } |
| 310 | |
| 311 | /* Update only the filename portion of the locator. */ |
| 312 | void |
| 313 | tui_update_locator_filename (const char *filename) |
| 314 | { |
| 315 | tui_set_locator_filename (filename); |
| 316 | tui_show_locator_content (); |
| 317 | } |
| 318 | |
| 319 | /* Function to print the frame information for the TUI. */ |
| 320 | void |
| 321 | tui_show_frame_info (struct frame_info *fi) |
| 322 | { |
| 323 | struct tui_win_info *win_info; |
| 324 | int i; |
| 325 | |
| 326 | if (fi) |
| 327 | { |
| 328 | int start_line, i; |
| 329 | CORE_ADDR low; |
| 330 | struct tui_gen_win_info *locator = tui_locator_win_info_ptr (); |
| 331 | int source_already_displayed; |
| 332 | struct symtab_and_line sal; |
| 333 | |
| 334 | find_frame_sal (fi, &sal); |
| 335 | |
| 336 | source_already_displayed = sal.symtab != 0 |
| 337 | && tui_source_is_displayed (sal.symtab->filename); |
| 338 | tui_set_locator_info (sal.symtab == 0 ? "??" : sal.symtab->filename, |
| 339 | tui_get_function_from_frame (fi), |
| 340 | sal.line, |
| 341 | get_frame_pc (fi)); |
| 342 | tui_show_locator_content (); |
| 343 | start_line = 0; |
| 344 | for (i = 0; i < (tui_source_windows ())->count; i++) |
| 345 | { |
| 346 | union tui_which_element *item; |
| 347 | win_info = (tui_source_windows ())->list[i]; |
| 348 | |
| 349 | item = &((struct tui_win_element *) locator->content[0])->which_element; |
| 350 | if (win_info == TUI_SRC_WIN) |
| 351 | { |
| 352 | start_line = (item->locator.line_no - |
| 353 | (win_info->generic.viewport_height / 2)) + 1; |
| 354 | if (start_line <= 0) |
| 355 | start_line = 1; |
| 356 | } |
| 357 | else |
| 358 | { |
| 359 | if (find_pc_partial_function (get_frame_pc (fi), (char **) NULL, |
| 360 | &low, (CORE_ADDR) 0) == 0) |
| 361 | error (_("No function contains program counter for selected frame.")); |
| 362 | else |
| 363 | low = tui_get_low_disassembly_address (low, get_frame_pc (fi)); |
| 364 | } |
| 365 | |
| 366 | if (win_info == TUI_SRC_WIN) |
| 367 | { |
| 368 | struct tui_line_or_address l; |
| 369 | l.loa = LOA_LINE; |
| 370 | l.u.line_no = start_line; |
| 371 | if (!(source_already_displayed |
| 372 | && tui_line_is_displayed (item->locator.line_no, win_info, TRUE))) |
| 373 | tui_update_source_window (win_info, sal.symtab, l, TRUE); |
| 374 | else |
| 375 | { |
| 376 | l.u.line_no = item->locator.line_no; |
| 377 | tui_set_is_exec_point_at (l, win_info); |
| 378 | } |
| 379 | } |
| 380 | else |
| 381 | { |
| 382 | if (win_info == TUI_DISASM_WIN) |
| 383 | { |
| 384 | struct tui_line_or_address a; |
| 385 | a.loa = LOA_ADDRESS; |
| 386 | a.u.addr = low; |
| 387 | if (!tui_addr_is_displayed (item->locator.addr, win_info, TRUE)) |
| 388 | tui_update_source_window (win_info, sal.symtab, a, TRUE); |
| 389 | else |
| 390 | { |
| 391 | a.u.addr = item->locator.addr; |
| 392 | tui_set_is_exec_point_at (a, win_info); |
| 393 | } |
| 394 | } |
| 395 | } |
| 396 | tui_update_exec_info (win_info); |
| 397 | } |
| 398 | } |
| 399 | else |
| 400 | { |
| 401 | tui_set_locator_info (NULL, NULL, 0, (CORE_ADDR) 0); |
| 402 | tui_show_locator_content (); |
| 403 | for (i = 0; i < (tui_source_windows ())->count; i++) |
| 404 | { |
| 405 | win_info = (tui_source_windows ())->list[i]; |
| 406 | tui_clear_source_content (win_info, EMPTY_SOURCE_PROMPT); |
| 407 | tui_update_exec_info (win_info); |
| 408 | } |
| 409 | } |
| 410 | } |
| 411 | |
| 412 | /* Function to initialize gdb commands, for tui window stack |
| 413 | manipulation. */ |
| 414 | |
| 415 | /* Provide a prototype to silence -Wmissing-prototypes. */ |
| 416 | extern initialize_file_ftype _initialize_tui_stack; |
| 417 | |
| 418 | void |
| 419 | _initialize_tui_stack (void) |
| 420 | { |
| 421 | add_com ("update", class_tui, tui_update_command, _("\ |
| 422 | Update the source window and locator to display the current execution point.\n")); |
| 423 | } |
| 424 | |
| 425 | /* Command to update the display with the current execution point. */ |
| 426 | static void |
| 427 | tui_update_command (char *arg, int from_tty) |
| 428 | { |
| 429 | char cmd[sizeof("frame 0")]; |
| 430 | |
| 431 | strcpy (cmd, "frame 0"); |
| 432 | execute_command (cmd, from_tty); |
| 433 | } |