1 /* TUI display locator.
2
3 Copyright 1998, 1999, 2000, 2001, 2002, 2003, 2004 Free Software
4 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 2 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, write to the Free Software
22 Foundation, Inc., 59 Temple Place - Suite 330,
23 Boston, MA 02111-1307, USA. */
24
25 #include "defs.h"
26 #include "symtab.h"
27 #include "breakpoint.h"
28 #include "frame.h"
29 #include "command.h"
30 #include "inferior.h"
31 #include "target.h"
32 #include "top.h"
33 #include "gdb_string.h"
34 #include "tui/tui.h"
35 #include "tui/tui-data.h"
36 #include "tui/tui-stack.h"
37 #include "tui/tui-wingeneral.h"
38 #include "tui/tui-source.h"
39 #include "tui/tui-winsource.h"
40 #include "tui/tui-file.h"
41
42 #include "gdb_curses.h"
43
44 /* Get a printable name for the function at the address.
45 The symbol name is demangled if demangling is turned on.
46 Returns a pointer to a static area holding the result. */
47 static char* tui_get_function_from_frame (struct frame_info *fi);
48
49 /* Set the filename portion of the locator. */
50 static void tui_set_locator_filename (const char *filename);
51
52 /* Update the locator, with the provided arguments. */
53 static void tui_set_locator_info (const char *filename, const char *procname,
54 int lineno, CORE_ADDR addr);
55
56 static void tui_update_command (char *, int);
57
58
59 /* Create the status line to display as much information as we
60 can on this single line: target name, process number, current
61 function, current line, current PC, SingleKey mode. */
62 static char*
tui_make_status_line(struct tui_locator_element * loc)63 tui_make_status_line (struct tui_locator_element* loc)
64 {
65 char* string;
66 char line_buf[50], *pname;
67 char* buf;
68 int status_size;
69 int i, proc_width;
70 const char* pid_name;
71 const char* pc_buf;
72 int target_width;
73 int pid_width;
74 int line_width;
75 int pc_width;
76 struct ui_file *pc_out;
77
78 if (ptid_equal (inferior_ptid, null_ptid))
79 pid_name = "No process";
80 else
81 pid_name = target_pid_to_str (inferior_ptid);
82
83 target_width = strlen (target_shortname);
84 if (target_width > MAX_TARGET_WIDTH)
85 target_width = MAX_TARGET_WIDTH;
86
87 pid_width = strlen (pid_name);
88 if (pid_width > MAX_PID_WIDTH)
89 pid_width = MAX_PID_WIDTH;
90
91 status_size = tui_term_width ();
92 string = (char *) xmalloc (status_size + 1);
93 buf = (char*) alloca (status_size + 1);
94
95 /* Translate line number and obtain its size. */
96 if (loc->line_no > 0)
97 sprintf (line_buf, "%d", loc->line_no);
98 else
99 strcpy (line_buf, "??");
100 line_width = strlen (line_buf);
101 if (line_width < MIN_LINE_WIDTH)
102 line_width = MIN_LINE_WIDTH;
103
104 /* Translate PC address. */
105 pc_out = tui_sfileopen (128);
106 print_address_numeric (loc->addr, 1, pc_out);
107 pc_buf = tui_file_get_strbuf (pc_out);
108 pc_width = strlen (pc_buf);
109
110 /* First determine the amount of proc name width we have available.
111 The +1 are for a space separator between fields.
112 The -1 are to take into account the \0 counted by sizeof. */
113 proc_width = (status_size
114 - (target_width + 1)
115 - (pid_width + 1)
116 - (sizeof (PROC_PREFIX) - 1 + 1)
117 - (sizeof (LINE_PREFIX) - 1 + line_width + 1)
118 - (sizeof (PC_PREFIX) - 1 + pc_width + 1)
119 - (tui_current_key_mode == TUI_SINGLE_KEY_MODE
120 ? (sizeof (SINGLE_KEY) - 1 + 1)
121 : 0));
122
123 /* If there is no room to print the function name, try by removing
124 some fields. */
125 if (proc_width < MIN_PROC_WIDTH)
126 {
127 proc_width += target_width + 1;
128 target_width = 0;
129 if (proc_width < MIN_PROC_WIDTH)
130 {
131 proc_width += pid_width + 1;
132 pid_width = 0;
133 if (proc_width <= MIN_PROC_WIDTH)
134 {
135 proc_width += pc_width + sizeof (PC_PREFIX) - 1 + 1;
136 pc_width = 0;
137 if (proc_width < 0)
138 {
139 proc_width += line_width + sizeof (LINE_PREFIX) - 1 + 1;
140 line_width = 0;
141 if (proc_width < 0)
142 proc_width = 0;
143 }
144 }
145 }
146 }
147
148 /* Now convert elements to string form */
149 pname = loc->proc_name;
150
151 /* Now create the locator line from the string version
152 of the elements. We could use sprintf() here but
153 that wouldn't ensure that we don't overrun the size
154 of the allocated buffer. strcat_to_buf() will. */
155 *string = (char) 0;
156
157 if (target_width > 0)
158 {
159 sprintf (buf, "%*.*s ",
160 -target_width, target_width, target_shortname);
161 strcat_to_buf (string, status_size, buf);
162 }
163 if (pid_width > 0)
164 {
165 sprintf (buf, "%*.*s ",
166 -pid_width, pid_width, pid_name);
167 strcat_to_buf (string, status_size, buf);
168 }
169
170 /* Show whether we are in SingleKey mode. */
171 if (tui_current_key_mode == TUI_SINGLE_KEY_MODE)
172 {
173 strcat_to_buf (string, status_size, SINGLE_KEY);
174 strcat_to_buf (string, status_size, " ");
175 }
176
177 /* procedure/class name */
178 if (proc_width > 0)
179 {
180 if (strlen (pname) > proc_width)
181 sprintf (buf, "%s%*.*s* ", PROC_PREFIX,
182 1 - proc_width, proc_width - 1, pname);
183 else
184 sprintf (buf, "%s%*.*s ", PROC_PREFIX,
185 -proc_width, proc_width, pname);
186 strcat_to_buf (string, status_size, buf);
187 }
188
189 if (line_width > 0)
190 {
191 sprintf (buf, "%s%*.*s ", LINE_PREFIX,
192 -line_width, line_width, line_buf);
193 strcat_to_buf (string, status_size, buf);
194 }
195 if (pc_width > 0)
196 {
197 strcat_to_buf (string, status_size, PC_PREFIX);
198 strcat_to_buf (string, status_size, pc_buf);
199 }
200
201
202 for (i = strlen (string); i < status_size; i++)
203 string[i] = ' ';
204 string[status_size] = (char) 0;
205
206 ui_file_delete (pc_out);
207 return string;
208 }
209
210 /* Get a printable name for the function at the address.
211 The symbol name is demangled if demangling is turned on.
212 Returns a pointer to a static area holding the result. */
213 static char*
tui_get_function_from_frame(struct frame_info * fi)214 tui_get_function_from_frame (struct frame_info *fi)
215 {
216 static char name[256];
217 struct ui_file *stream = tui_sfileopen (256);
218 char *p;
219
220 print_address_symbolic (get_frame_pc (fi), stream, demangle, "");
221 p = tui_file_get_strbuf (stream);
222
223 /* Use simple heuristics to isolate the function name. The symbol can
224 be demangled and we can have function parameters. Remove them because
225 the status line is too short to display them. */
226 if (*p == '<')
227 p++;
228 strncpy (name, p, sizeof (name));
229 p = strchr (name, '(');
230 if (!p)
231 p = strchr (name, '>');
232 if (p)
233 *p = 0;
234 p = strchr (name, '+');
235 if (p)
236 *p = 0;
237 ui_file_delete (stream);
238 return name;
239 }
240
241 void
tui_show_locator_content(void)242 tui_show_locator_content (void)
243 {
244 char *string;
245 struct tui_gen_win_info * locator;
246
247 locator = tui_locator_win_info_ptr ();
248
249 if (locator != NULL && locator->handle != (WINDOW *) NULL)
250 {
251 struct tui_win_element * element;
252
253 element = (struct tui_win_element *) locator->content[0];
254
255 string = tui_make_status_line (&element->which_element.locator);
256 wmove (locator->handle, 0, 0);
257 wstandout (locator->handle);
258 waddstr (locator->handle, string);
259 wclrtoeol (locator->handle);
260 wstandend (locator->handle);
261 tui_refresh_win (locator);
262 wmove (locator->handle, 0, 0);
263 xfree (string);
264 locator->content_in_use = TRUE;
265 }
266 }
267
268
269 /* Set the filename portion of the locator. */
270 static void
tui_set_locator_filename(const char * filename)271 tui_set_locator_filename (const char *filename)
272 {
273 struct tui_gen_win_info * locator = tui_locator_win_info_ptr ();
274 struct tui_locator_element * element;
275
276 if (locator->content[0] == NULL)
277 {
278 tui_set_locator_info (filename, NULL, 0, 0);
279 return;
280 }
281
282 element = &((struct tui_win_element *) locator->content[0])->which_element.locator;
283 element->file_name[0] = 0;
284 strcat_to_buf (element->file_name, MAX_LOCATOR_ELEMENT_LEN, filename);
285 }
286
287 /* Update the locator, with the provided arguments. */
288 static void
tui_set_locator_info(const char * filename,const char * procname,int lineno,CORE_ADDR addr)289 tui_set_locator_info (const char *filename, const char *procname, int lineno,
290 CORE_ADDR addr)
291 {
292 struct tui_gen_win_info * locator = tui_locator_win_info_ptr ();
293 struct tui_locator_element * element;
294
295 /* Allocate the locator content if necessary. */
296 if (locator->content_size <= 0)
297 {
298 locator->content = (void **) tui_alloc_content (1, locator->type);
299 locator->content_size = 1;
300 }
301
302 element = &((struct tui_win_element *) locator->content[0])->which_element.locator;
303 element->proc_name[0] = (char) 0;
304 strcat_to_buf (element->proc_name, MAX_LOCATOR_ELEMENT_LEN, procname);
305 element->line_no = lineno;
306 element->addr = addr;
307 tui_set_locator_filename (filename);
308 }
309
310 /* Update only the filename portion of the locator. */
311 void
tui_update_locator_filename(const char * filename)312 tui_update_locator_filename (const char *filename)
313 {
314 tui_set_locator_filename (filename);
315 tui_show_locator_content ();
316 }
317
318 /* Function to print the frame information for the TUI. */
319 void
tui_show_frame_info(struct frame_info * fi)320 tui_show_frame_info (struct frame_info *fi)
321 {
322 struct tui_win_info * win_info;
323 int i;
324
325 if (fi)
326 {
327 int start_line, i;
328 CORE_ADDR low;
329 struct tui_gen_win_info * locator = tui_locator_win_info_ptr ();
330 int source_already_displayed;
331 struct symtab_and_line sal;
332
333 find_frame_sal (fi, &sal);
334
335 source_already_displayed = sal.symtab != 0
336 && tui_source_is_displayed (sal.symtab->filename);
337 tui_set_locator_info (sal.symtab == 0 ? "??" : sal.symtab->filename,
338 tui_get_function_from_frame (fi),
339 sal.line,
340 get_frame_pc (fi));
341 tui_show_locator_content ();
342 start_line = 0;
343 for (i = 0; i < (tui_source_windows ())->count; i++)
344 {
345 union tui_which_element *item;
346 win_info = (struct tui_win_info *) (tui_source_windows ())->list[i];
347
348 item = &((struct tui_win_element *) locator->content[0])->which_element;
349 if (win_info == TUI_SRC_WIN)
350 {
351 start_line = (item->locator.line_no -
352 (win_info->generic.viewport_height / 2)) + 1;
353 if (start_line <= 0)
354 start_line = 1;
355 }
356 else
357 {
358 if (find_pc_partial_function (get_frame_pc (fi), (char **) NULL,
359 &low, NULL) == 0)
360 error ("No function contains program counter for selected frame.\n");
361 else
362 low = tui_get_low_disassembly_address (low, get_frame_pc (fi));
363 }
364
365 if (win_info == TUI_SRC_WIN)
366 {
367 union tui_line_or_address l;
368 l.line_no = start_line;
369 if (!(source_already_displayed
370 && tui_line_is_displayed (item->locator.line_no, win_info, TRUE)))
371 tui_update_source_window (win_info, sal.symtab, l, TRUE);
372 else
373 {
374 l.line_no = item->locator.line_no;
375 tui_set_is_exec_point_at (l, win_info);
376 }
377 }
378 else
379 {
380 if (win_info == TUI_DISASM_WIN)
381 {
382 union tui_line_or_address a;
383 a.addr = low;
384 if (!tui_addr_is_displayed (item->locator.addr, win_info, TRUE))
385 tui_update_source_window (win_info, sal.symtab, a, TRUE);
386 else
387 {
388 a.addr = item->locator.addr;
389 tui_set_is_exec_point_at (a, win_info);
390 }
391 }
392 }
393 tui_update_exec_info (win_info);
394 }
395 }
396 else
397 {
398 tui_set_locator_info (NULL, NULL, 0, (CORE_ADDR) 0);
399 tui_show_locator_content ();
400 for (i = 0; i < (tui_source_windows ())->count; i++)
401 {
402 win_info = (struct tui_win_info *) (tui_source_windows ())->list[i];
403 tui_clear_source_content (win_info, EMPTY_SOURCE_PROMPT);
404 tui_update_exec_info (win_info);
405 }
406 }
407 }
408
409 /* Function to initialize gdb commands, for tui window stack
410 manipulation. */
411 void
_initialize_tui_stack(void)412 _initialize_tui_stack (void)
413 {
414 add_com ("update", class_tui, tui_update_command,
415 "Update the source window and locator to display the current "
416 "execution point.\n");
417 }
418
419 /* Command to update the display with the current execution point. */
420 static void
tui_update_command(char * arg,int from_tty)421 tui_update_command (char *arg, int from_tty)
422 {
423 char cmd[sizeof("frame 0")];
424
425 strcpy (cmd, "frame 0");
426 execute_command (cmd, from_tty);
427 }
428