gdb/tui/tui-winsource.c

   1 /* TUI display source/assembly window.
   2
   3    Copyright (C) 1998-2019 Free Software Foundation, Inc.
   4
   5    Contributed by Hewlett-Packard Company.
   6
   7    This file is part of GDB.
   8
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 3 of the License, or
  12    (at your option) any later version.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  21
  22 #include "defs.h"
  23 #include <ctype.h>
  24 #include "symtab.h"
  25 #include "frame.h"
  26 #include "breakpoint.h"
  27 #include "value.h"
  28 #include "source.h"
  29 #include "objfiles.h"
  30 #include "filenames.h"
  31
  32 #include "tui/tui.h"
  33 #include "tui/tui-data.h"
  34 #include "tui/tui-io.h"
  35 #include "tui/tui-stack.h"
  36 #include "tui/tui-win.h"
  37 #include "tui/tui-wingeneral.h"
  38 #include "tui/tui-winsource.h"
  39 #include "tui/tui-source.h"
  40 #include "tui/tui-disasm.h"
  41 #include "gdb_curses.h"
  42
  43 /* Function to display the "main" routine.  */
  44 void
  45 tui_display_main ()
  46 {
  47   auto adapter = tui_source_windows ();
  48   if (adapter.begin () != adapter.end ())
  49     {
  50       struct gdbarch *gdbarch;
  51       CORE_ADDR addr;
  52
  53       tui_get_begin_asm_address (&gdbarch, &addr);
  54       if (addr != (CORE_ADDR) 0)
  55         {
  56           struct symtab *s;
  57
  58           tui_update_source_windows_with_addr (gdbarch, addr);
  59           s = find_pc_line_symtab (addr);
  60           if (s != NULL)
  61              tui_update_locator_fullname (symtab_to_fullname (s));
  62           else
  63              tui_update_locator_fullname ("??");
  64         }
  65     }
  66 }
  67
  68
  69
  70 /* Function to display source in the source window.  This function
  71    initializes the horizontal scroll to 0.  */
  72 void
  73 tui_source_window_base::update_source_window
  74   (struct gdbarch *gdbarch,
  75    struct symtab *s,
  76    struct tui_line_or_address line_or_addr)
  77 {
  78   horizontal_offset = 0;
  79   update_source_window_as_is (gdbarch, s, line_or_addr);
  80 }
  81
  82
  83 /* Function to display source in the source/asm window.  This function
  84    shows the source as specified by the horizontal offset.  */
  85 void
  86 tui_source_window_base::update_source_window_as_is
  87   (struct gdbarch *gdbarch,
  88    struct symtab *s,
  89    struct tui_line_or_address line_or_addr)
  90 {
  91   enum tui_status ret
  92     = set_contents (gdbarch, s, line_or_addr);
  93
  94   if (ret == TUI_FAILURE)
  95     erase_source_content ();
  96   else
  97     {
  98       update_breakpoint_info (nullptr, false);
  99       show_source_content ();
 100       update_exec_info ();
 101       if (type == SRC_WIN)
 102         {
 103           symtab_and_line sal;
 104
 105           sal.line = line_or_addr.u.line_no + (content.size () - 2);
 106           sal.symtab = s;
 107           sal.pspace = SYMTAB_PSPACE (s);
 108           set_current_source_symtab_and_line (sal);
 109           /* If the focus was in the asm win, put it in the src win if
 110              we don't have a split layout.  */
 111           if (tui_win_with_focus () == TUI_DISASM_WIN
 112               && tui_current_layout () != SRC_DISASSEM_COMMAND)
 113             tui_set_win_focus_to (this);
 114         }
 115     }
 116 }
 117
 118
 119 /* Function to ensure that the source and/or disassemly windows
 120    reflect the input address.  */
 121 void
 122 tui_update_source_windows_with_addr (struct gdbarch *gdbarch, CORE_ADDR addr)
 123 {
 124   if (addr != 0)
 125     {
 126       struct symtab_and_line sal;
 127       struct tui_line_or_address l;
 128
 129       switch (tui_current_layout ())
 130         {
 131         case DISASSEM_COMMAND:
 132         case DISASSEM_DATA_COMMAND:
 133           tui_show_disassem (gdbarch, addr);
 134           break;
 135         case SRC_DISASSEM_COMMAND:
 136           tui_show_disassem_and_update_source (gdbarch, addr);
 137           break;
 138         default:
 139           sal = find_pc_line (addr, 0);
 140           l.loa = LOA_LINE;
 141           l.u.line_no = sal.line;
 142           TUI_SRC_WIN->show_symtab_source (gdbarch, sal.symtab, l);
 143           break;
 144         }
 145     }
 146   else
 147     {
 148       for (struct tui_source_window_base *win_info : tui_source_windows ())
 149         win_info->erase_source_content ();
 150     }
 151 }
 152
 153 /* Function to ensure that the source and/or disassemly windows
 154    reflect the input address.  */
 155 void
 156 tui_update_source_windows_with_line (struct symtab *s, int line)
 157 {
 158   struct gdbarch *gdbarch;
 159   CORE_ADDR pc;
 160   struct tui_line_or_address l;
 161
 162   if (!s)
 163     return;
 164
 165   gdbarch = get_objfile_arch (SYMTAB_OBJFILE (s));
 166
 167   switch (tui_current_layout ())
 168     {
 169     case DISASSEM_COMMAND:
 170     case DISASSEM_DATA_COMMAND:
 171       find_line_pc (s, line, &pc);
 172       tui_update_source_windows_with_addr (gdbarch, pc);
 173       break;
 174     default:
 175       l.loa = LOA_LINE;
 176       l.u.line_no = line;
 177       TUI_SRC_WIN->show_symtab_source (gdbarch, s, l);
 178       if (tui_current_layout () == SRC_DISASSEM_COMMAND)
 179         {
 180           find_line_pc (s, line, &pc);
 181           tui_show_disassem (gdbarch, pc);
 182         }
 183       break;
 184     }
 185 }
 186
 187 void
 188 tui_source_window_base::do_erase_source_content (const char *str)
 189 {
 190   int x_pos;
 191   int half_width = (width - 2) / 2;
 192
 193   content.clear ();
 194   if (handle != NULL)
 195     {
 196       werase (handle);
 197       check_and_display_highlight_if_needed ();
 198
 199       if (strlen (str) >= half_width)
 200         x_pos = 1;
 201       else
 202         x_pos = half_width - strlen (str);
 203       mvwaddstr (handle,
 204                  (height / 2),
 205                  x_pos,
 206                  (char *) str);
 207
 208       refresh_window ();
 209     }
 210 }
 211
 212
 213 /* Redraw the complete line of a source or disassembly window.  */
 214 static void
 215 tui_show_source_line (struct tui_source_window_base *win_info, int lineno)
 216 {
 217   struct tui_source_element *line;
 218   int x;
 219
 220   line = &win_info->content[lineno - 1];
 221   if (line->is_exec_point)
 222     tui_set_reverse_mode (win_info->handle, true);
 223
 224   wmove (win_info->handle, lineno, TUI_EXECINFO_SIZE);
 225   tui_puts (line->line.get (), win_info->handle);
 226   if (line->is_exec_point)
 227     tui_set_reverse_mode (win_info->handle, false);
 228
 229   /* Clear to end of line but stop before the border.  */
 230   x = getcurx (win_info->handle);
 231   while (x + 1 < win_info->width)
 232     {
 233       waddch (win_info->handle, ' ');
 234       x = getcurx (win_info->handle);
 235     }
 236 }
 237
 238 void
 239 tui_source_window_base::show_source_content ()
 240 {
 241   if (!content.empty ())
 242     {
 243       int lineno;
 244
 245       for (lineno = 1; lineno <= content.size (); lineno++)
 246         tui_show_source_line (this, lineno);
 247     }
 248   else
 249     erase_source_content ();
 250
 251   check_and_display_highlight_if_needed ();
 252   refresh_window ();
 253 }
 254
 255 tui_source_window_base::tui_source_window_base (enum tui_win_type type)
 256   : tui_win_info (type)
 257 {
 258   gdb_assert (type == SRC_WIN || type == DISASSEM_WIN);
 259   start_line_or_addr.loa = LOA_ADDRESS;
 260   start_line_or_addr.u.addr = 0;
 261 }
 262
 263
 264 tui_source_window_base::~tui_source_window_base ()
 265 {
 266   xfree (fullname);
 267 }
 268
 269 /* See tui-data.h.  */
 270
 271 void
 272 tui_source_window_base::update_tab_width ()
 273 {
 274   werase (handle);
 275   rerender ();
 276 }
 277
 278 void
 279 tui_source_window_base::rerender ()
 280 {
 281   if (!content.empty ())
 282     {
 283       struct tui_line_or_address line_or_addr;
 284       struct symtab_and_line cursal
 285         = get_current_source_symtab_and_line ();
 286
 287       line_or_addr = start_line_or_addr;
 288       update_source_window (gdbarch, cursal.symtab, line_or_addr);
 289     }
 290   else if (deprecated_safe_get_selected_frame () != NULL)
 291     {
 292       struct tui_line_or_address line;
 293       struct symtab_and_line cursal
 294         = get_current_source_symtab_and_line ();
 295       struct frame_info *frame = deprecated_safe_get_selected_frame ();
 296       struct gdbarch *gdbarch = get_frame_arch (frame);
 297
 298       struct symtab *s = find_pc_line_symtab (get_frame_pc (frame));
 299       if (type == SRC_WIN)
 300         {
 301           line.loa = LOA_LINE;
 302           line.u.line_no = cursal.line;
 303         }
 304       else
 305         {
 306           line.loa = LOA_ADDRESS;
 307           find_line_pc (s, cursal.line, &line.u.addr);
 308         }
 309       update_source_window (gdbarch, s, line);
 310     }
 311   else
 312     erase_source_content ();
 313 }
 314
 315 /* See tui-data.h.  */
 316
 317 void
 318 tui_source_window_base::refill ()
 319 {
 320   symtab *s = nullptr;
 321
 322   if (type == SRC_WIN)
 323     {
 324       symtab_and_line cursal = get_current_source_symtab_and_line ();
 325       s = (cursal.symtab == NULL
 326            ? find_pc_line_symtab (get_frame_pc (get_selected_frame (NULL)))
 327            : cursal.symtab);
 328     }
 329
 330   update_source_window_as_is (gdbarch, s, content[0].line_or_addr);
 331 }
 332
 333 /* Scroll the source forward or backward horizontally.  */
 334
 335 void
 336 tui_source_window_base::do_scroll_horizontal (int num_to_scroll)
 337 {
 338   if (!content.empty ())
 339     {
 340       int offset = horizontal_offset + num_to_scroll;
 341       if (offset < 0)
 342         offset = 0;
 343       horizontal_offset = offset;
 344       refill ();
 345     }
 346 }
 347
 348
 349 /* Set or clear the is_exec_point flag in the line whose line is
 350    line_no.  */
 351
 352 void
 353 tui_source_window_base::set_is_exec_point_at (struct tui_line_or_address l)
 354 {
 355   bool changed = false;
 356   int i;
 357
 358   i = 0;
 359   while (i < content.size ())
 360     {
 361       bool new_state;
 362       struct tui_line_or_address content_loa =
 363         content[i].line_or_addr;
 364
 365       gdb_assert (l.loa == LOA_ADDRESS || l.loa == LOA_LINE);
 366       gdb_assert (content_loa.loa == LOA_LINE
 367                   || content_loa.loa == LOA_ADDRESS);
 368       if (content_loa.loa == l.loa
 369           && ((l.loa == LOA_LINE && content_loa.u.line_no == l.u.line_no)
 370               || (l.loa == LOA_ADDRESS && content_loa.u.addr == l.u.addr)))
 371         new_state = true;
 372       else
 373         new_state = false;
 374       if (new_state != content[i].is_exec_point)
 375         {
 376           changed = true;
 377           content[i].is_exec_point = new_state;
 378           tui_show_source_line (this, i + 1);
 379         }
 380       i++;
 381     }
 382   if (changed)
 383     refill ();
 384 }
 385
 386 /* See tui-winsource.h.  */
 387
 388 void
 389 tui_update_all_breakpoint_info (struct breakpoint *being_deleted)
 390 {
 391   for (tui_source_window_base *win : tui_source_windows ())
 392     {
 393       if (win->update_breakpoint_info (being_deleted, false))
 394         win->update_exec_info ();
 395     }
 396 }
 397
 398
 399 /* Scan the source window and the breakpoints to update the break_mode
 400    information for each line.
 401
 402    Returns true if something changed and the execution window must be
 403    refreshed.  */
 404
 405 bool
 406 tui_source_window_base::update_breakpoint_info
 407   (struct breakpoint *being_deleted, bool current_only)
 408 {
 409   int i;
 410   bool need_refresh = false;
 411
 412   for (i = 0; i < content.size (); i++)
 413     {
 414       struct breakpoint *bp;
 415       extern struct breakpoint *breakpoint_chain;
 416       struct tui_source_element *line;
 417
 418       line = &content[i];
 419       if (current_only && !line->is_exec_point)
 420          continue;
 421
 422       /* Scan each breakpoint to see if the current line has something to
 423          do with it.  Identify enable/disabled breakpoints as well as
 424          those that we already hit.  */
 425       tui_bp_flags mode = 0;
 426       for (bp = breakpoint_chain;
 427            bp != NULL;
 428            bp = bp->next)
 429         {
 430           struct bp_location *loc;
 431
 432           gdb_assert (line->line_or_addr.loa == LOA_LINE
 433                       || line->line_or_addr.loa == LOA_ADDRESS);
 434
 435           if (bp == being_deleted)
 436             continue;
 437
 438           for (loc = bp->loc; loc != NULL; loc = loc->next)
 439             {
 440               if (location_matches_p (loc, i))
 441                 {
 442                   if (bp->enable_state == bp_disabled)
 443                     mode |= TUI_BP_DISABLED;
 444                   else
 445                     mode |= TUI_BP_ENABLED;
 446                   if (bp->hit_count)
 447                     mode |= TUI_BP_HIT;
 448                   if (bp->loc->cond)
 449                     mode |= TUI_BP_CONDITIONAL;
 450                   if (bp->type == bp_hardware_breakpoint)
 451                     mode |= TUI_BP_HARDWARE;
 452                 }
 453             }
 454         }
 455       if (line->break_mode != mode)
 456         {
 457           line->break_mode = mode;
 458           need_refresh = true;
 459         }
 460     }
 461   return need_refresh;
 462 }
 463
 464 /* Function to initialize the content of the execution info window,
 465    based upon the input window which is either the source or
 466    disassembly window.  */
 467 void
 468 tui_source_window_base::update_exec_info ()
 469 {
 470   update_breakpoint_info (nullptr, true);
 471   for (int i = 0; i < content.size (); i++)
 472     {
 473       struct tui_source_element *src_element = &content[i];
 474       char element[TUI_EXECINFO_SIZE] = "   ";
 475
 476       /* Now update the exec info content based upon the state
 477          of each line as indicated by the source content.  */
 478       tui_bp_flags mode = src_element->break_mode;
 479       if (mode & TUI_BP_HIT)
 480         element[TUI_BP_HIT_POS] = (mode & TUI_BP_HARDWARE) ? 'H' : 'B';
 481       else if (mode & (TUI_BP_ENABLED | TUI_BP_DISABLED))
 482         element[TUI_BP_HIT_POS] = (mode & TUI_BP_HARDWARE) ? 'h' : 'b';
 483
 484       if (mode & TUI_BP_ENABLED)
 485         element[TUI_BP_BREAK_POS] = '+';
 486       else if (mode & TUI_BP_DISABLED)
 487         element[TUI_BP_BREAK_POS] = '-';
 488
 489       if (src_element->is_exec_point)
 490         element[TUI_EXEC_POS] = '>';
 491
 492       mvwaddstr (handle, i + 1, 1, element);
 493     }
 494   refresh_window ();
 495 }