gdb/tui/tui-data.h

   1 /* TUI data manipulation routines.
   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 #ifndef TUI_TUI_DATA_H
  23 #define TUI_TUI_DATA_H
  24
  25 #include "tui/tui.h"    /* For enum tui_win_type.  */
  26 #include "gdb_curses.h" /* For WINDOW.  */
  27
  28 /* This is a point definition.  */
  29 struct tui_point
  30 {
  31   int x, y;
  32 };
  33
  34 /* Generic window information.  */
  35 struct tui_gen_win_info
  36 {
  37 protected:
  38
  39   explicit tui_gen_win_info (enum tui_win_type t)
  40     : type (t)
  41   {
  42   }
  43
  44 public:
  45
  46   virtual ~tui_gen_win_info ();
  47
  48   /* Call to refresh this window.  */
  49   virtual void refresh_window ();
  50
  51   /* Make this window visible or invisible.  */
  52   virtual void make_visible (bool visible);
  53
  54   /* Return the name of this type of window.  */
  55   virtual const char *name () const
  56   {
  57     return "";
  58   }
  59
  60   /* Reset this window.  WIN_TYPE must match the existing type of this
  61      window (it is only passed for self-test purposes).  The other
  62      parameters are used to set the window's size and position.  */
  63   void reset (enum tui_win_type win_type,
  64               int height, int width,
  65               int origin_x, int origin_y);
  66
  67   /* Window handle.  */
  68   WINDOW *handle = nullptr;
  69   /* Type of window.  */
  70   enum tui_win_type type;
  71   /* Window width.  */
  72   int width = 0;
  73   /* Window height.  */
  74   int height = 0;
  75   /* Origin of window.  */
  76   struct tui_point origin = {0, 0};
  77   /* Can it be used, or is it already used?  */
  78   int content_in_use = FALSE;
  79   /* Viewport height.  */
  80   int viewport_height = 0;
  81   /* Index of last visible line.  */
  82   int last_visible_line = 0;
  83   /* Whether the window is visible or not.  */
  84   bool is_visible = false;
  85   /* Window title to display.  */
  86   char *title = nullptr;
  87 };
  88
  89 /* Whether or not a window should be drawn with a box.  */
  90 enum tui_box
  91 {
  92   DONT_BOX_WINDOW = 0,
  93   BOX_WINDOW
  94 };
  95
  96 /* Constant definitions.  */
  97 #define DEFAULT_TAB_LEN         8
  98 #define NO_SRC_STRING           "[ No Source Available ]"
  99 #define NO_DISASSEM_STRING      "[ No Assembly Available ]"
 100 #define NO_REGS_STRING          "[ Register Values Unavailable ]"
 101 #define NO_DATA_STRING          "[ No Data Values Displayed ]"
 102 #define MAX_CONTENT_COUNT       100
 103 #define SRC_NAME                "src"
 104 #define CMD_NAME                "cmd"
 105 #define DATA_NAME               "regs"
 106 #define DISASSEM_NAME           "asm"
 107 #define TUI_NULL_STR            ""
 108 #define DEFAULT_HISTORY_COUNT   25
 109 #define HILITE                  TRUE
 110 #define NO_HILITE               FALSE
 111 #define WITH_LOCATOR            TRUE
 112 #define NO_LOCATOR              FALSE
 113 #define EMPTY_SOURCE_PROMPT     TRUE
 114 #define NO_EMPTY_SOURCE_PROMPT  FALSE
 115 #define UNDEFINED_ITEM          -1
 116 #define MIN_WIN_HEIGHT          3
 117 #define MIN_CMD_WIN_HEIGHT      3
 118
 119 /* Strings to display in the TUI status line.  */
 120 #define PROC_PREFIX             "In: "
 121 #define LINE_PREFIX             "L"
 122 #define PC_PREFIX               "PC: "
 123 #define SINGLE_KEY              "(SingleKey)"
 124
 125 /* Minimum/Maximum length of some fields displayed in the TUI status
 126    line.  */
 127 #define MIN_LINE_WIDTH     4    /* Use at least 4 digits for line
 128                                    numbers.  */
 129 #define MIN_PROC_WIDTH    12
 130 #define MAX_TARGET_WIDTH  10
 131 #define MAX_PID_WIDTH     19
 132
 133 /* The kinds of layouts available.  */
 134 enum tui_layout_type
 135 {
 136   SRC_COMMAND,
 137   DISASSEM_COMMAND,
 138   SRC_DISASSEM_COMMAND,
 139   SRC_DATA_COMMAND,
 140   DISASSEM_DATA_COMMAND,
 141   UNDEFINED_LAYOUT
 142 };
 143
 144 enum tui_line_or_address_kind
 145 {
 146   LOA_LINE,
 147   LOA_ADDRESS
 148 };
 149
 150 /* Structure describing source line or line address.  */
 151 struct tui_line_or_address
 152 {
 153   enum tui_line_or_address_kind loa;
 154   union
 155     {
 156       int line_no;
 157       CORE_ADDR addr;
 158     } u;
 159 };
 160
 161 /* Current Layout definition.  */
 162 struct tui_layout_def
 163 {
 164   enum tui_win_type display_mode;
 165 };
 166
 167 /* Elements in the Source/Disassembly Window.  */
 168 struct tui_source_element
 169 {
 170   tui_source_element ()
 171   {
 172     line_or_addr.loa = LOA_LINE;
 173     line_or_addr.u.line_no = 0;
 174   }
 175
 176   ~tui_source_element ()
 177   {
 178     xfree (line);
 179   }
 180
 181   char *line = nullptr;
 182   struct tui_line_or_address line_or_addr;
 183   bool is_exec_point = false;
 184   int has_break = 0;
 185 };
 186
 187
 188 #ifdef PATH_MAX
 189 # define MAX_LOCATOR_ELEMENT_LEN        PATH_MAX
 190 #else
 191 # define MAX_LOCATOR_ELEMENT_LEN        1024
 192 #endif
 193
 194 /* Flags to tell what kind of breakpoint is at current line.  */
 195 #define TUI_BP_ENABLED      0x01
 196 #define TUI_BP_DISABLED     0x02
 197 #define TUI_BP_HIT          0x04
 198 #define TUI_BP_CONDITIONAL  0x08
 199 #define TUI_BP_HARDWARE     0x10
 200
 201 /* Position of breakpoint markers in the exec info string.  */
 202 #define TUI_BP_HIT_POS      0
 203 #define TUI_BP_BREAK_POS    1
 204 #define TUI_EXEC_POS        2
 205 #define TUI_EXECINFO_SIZE   4
 206
 207 typedef char tui_exec_info_content[TUI_EXECINFO_SIZE];
 208
 209 /* Execution info window class.  */
 210
 211 struct tui_exec_info_window : public tui_gen_win_info
 212 {
 213   tui_exec_info_window ()
 214     : tui_gen_win_info (EXEC_INFO_WIN)
 215   {
 216   }
 217
 218   ~tui_exec_info_window () override
 219   {
 220     xfree (m_content);
 221   }
 222
 223   /* Get or allocate contents.  */
 224   tui_exec_info_content *maybe_allocate_content (int n_elements);
 225
 226   /* Return the contents.  */
 227   const tui_exec_info_content *get_content () const
 228   {
 229     return m_content;
 230   }
 231
 232 private:
 233
 234   tui_exec_info_content *m_content = nullptr;
 235 };
 236
 237 /* Locator window class.  */
 238
 239 struct tui_locator_window : public tui_gen_win_info
 240 {
 241   tui_locator_window ()
 242     : tui_gen_win_info (LOCATOR_WIN)
 243   {
 244     full_name[0] = 0;
 245     proc_name[0] = 0;
 246   }
 247
 248   char full_name[MAX_LOCATOR_ELEMENT_LEN];
 249   char proc_name[MAX_LOCATOR_ELEMENT_LEN];
 250   int line_no = 0;
 251   CORE_ADDR addr = 0;
 252   /* Architecture associated with code at this location.  */
 253   struct gdbarch *gdbarch = nullptr;
 254 };
 255
 256 /* A data item window.  */
 257
 258 struct tui_data_item_window : public tui_gen_win_info
 259 {
 260   tui_data_item_window ()
 261     : tui_gen_win_info (DATA_ITEM_WIN)
 262   {
 263   }
 264
 265   ~tui_data_item_window () override;
 266
 267   const char *name = nullptr;
 268   /* The register number, or data display number.  */
 269   int item_no = UNDEFINED_ITEM;
 270   void *value = nullptr;
 271   bool highlight = false;
 272   char *content = nullptr;
 273 };
 274
 275 /* This defines information about each logical window.  */
 276 struct tui_win_info : public tui_gen_win_info
 277 {
 278 protected:
 279
 280   explicit tui_win_info (enum tui_win_type type);
 281   DISABLE_COPY_AND_ASSIGN (tui_win_info);
 282
 283   /* Scroll the contents vertically.  This is only called via
 284      forward_scroll and backward_scroll.  */
 285   virtual void do_scroll_vertical (int num_to_scroll) = 0;
 286
 287   /* Scroll the contents horizontally.  This is only called via
 288      left_scroll and right_scroll.  */
 289   virtual void do_scroll_horizontal (int num_to_scroll) = 0;
 290
 291   /* Called after make_visible_with_new_height sets the new height.
 292      Should update the window.  */
 293   virtual void do_make_visible_with_new_height () = 0;
 294
 295 public:
 296
 297   ~tui_win_info () override
 298   {
 299   }
 300
 301   /* Clear the pertinent detail in the window.  */
 302   virtual void clear_detail () = 0;
 303
 304   /* Return true if this window has the locator.  */
 305   virtual bool has_locator () const
 306   {
 307     return false;
 308   }
 309
 310   /* Refresh this window and any associated windows.  */
 311   virtual void refresh ();
 312
 313   /* Called after all the TUI windows are refreshed, to let this
 314      window have a chance to update itself further.  */
 315   virtual void refresh_all ()
 316   {
 317   }
 318
 319   /* Called after a TUI window is given a new height; this updates any
 320      related auxiliary windows.  */
 321   virtual void set_new_height (int height)
 322   {
 323   }
 324
 325   /* Compute the maximum height of this window.  */
 326   virtual int max_height () const;
 327
 328   /* Called after the tab width has been changed.  */
 329   virtual void update_tab_width ()
 330   {
 331   }
 332
 333   /* Make the window visible after the height has been changed.  */
 334   void make_visible_with_new_height ();
 335
 336   /* Set whether this window is highglighted.  */
 337   void set_highlight (bool highlight)
 338   {
 339     is_highlighted = highlight;
 340   }
 341
 342   /* Methods to scroll the contents of this window.  Note that they
 343      are named with "_scroll" coming at the end because the more
 344      obvious "scroll_forward" is defined as a macro in term.h.  */
 345   void forward_scroll (int num_to_scroll);
 346   void backward_scroll (int num_to_scroll);
 347   void left_scroll (int num_to_scroll);
 348   void right_scroll (int num_to_scroll);
 349
 350   /* Can this window ever be highlighted?  */
 351   bool can_highlight = true;
 352
 353   /* Is this window highlighted?  */
 354   bool is_highlighted = false;
 355 };
 356
 357 /* The base class for all source-like windows, namely the source and
 358    disassembly windows.  */
 359
 360 struct tui_source_window_base : public tui_win_info
 361 {
 362 protected:
 363   explicit tui_source_window_base (enum tui_win_type type);
 364   ~tui_source_window_base () override;
 365   DISABLE_COPY_AND_ASSIGN (tui_source_window_base);
 366
 367   void do_scroll_horizontal (int num_to_scroll) override;
 368   void do_make_visible_with_new_height () override;
 369
 370 public:
 371
 372   void clear_detail () override;
 373
 374   /* Return true if this window has the locator.  */
 375   bool has_locator () const override
 376   {
 377     return m_has_locator;
 378   }
 379
 380   void make_visible (bool visible) override;
 381   void refresh () override;
 382   void refresh_all () override;
 383
 384   /* Refill the source window's source cache and update it.  If this
 385      is a disassembly window, then just update it.  */
 386   void refill ();
 387
 388   /* Set the location of the execution point.  */
 389   void set_is_exec_point_at (struct tui_line_or_address l);
 390
 391   void set_new_height (int height) override;
 392
 393   void update_tab_width () override;
 394
 395   /* Does the locator belong to this window?  */
 396   bool m_has_locator = false;
 397   /* Execution information window.  */
 398   struct tui_exec_info_window *execution_info = nullptr;
 399   /* Used for horizontal scroll.  */
 400   int horizontal_offset = 0;
 401   struct tui_line_or_address start_line_or_addr;
 402
 403   /* It is the resolved form as returned by symtab_to_fullname.  */
 404   char *fullname = nullptr;
 405
 406   /* Architecture associated with code at this location.  */
 407   struct gdbarch *gdbarch = nullptr;
 408
 409   std::vector<tui_source_element> content;
 410 };
 411
 412 /* A TUI source window.  */
 413
 414 struct tui_source_window : public tui_source_window_base
 415 {
 416   tui_source_window ()
 417     : tui_source_window_base (SRC_WIN)
 418   {
 419   }
 420
 421   DISABLE_COPY_AND_ASSIGN (tui_source_window);
 422
 423   const char *name () const override
 424   {
 425     return SRC_NAME;
 426   }
 427
 428 protected:
 429
 430   void do_scroll_vertical (int num_to_scroll) override;
 431 };
 432
 433 /* A TUI disassembly window.  */
 434
 435 struct tui_disasm_window : public tui_source_window_base
 436 {
 437   tui_disasm_window ()
 438     : tui_source_window_base (DISASSEM_WIN)
 439   {
 440   }
 441
 442   DISABLE_COPY_AND_ASSIGN (tui_disasm_window);
 443
 444   const char *name () const override
 445   {
 446     return DISASSEM_NAME;
 447   }
 448
 449 protected:
 450
 451   void do_scroll_vertical (int num_to_scroll) override;
 452 };
 453
 454 struct tui_data_window : public tui_win_info
 455 {
 456   tui_data_window ()
 457     : tui_win_info (DATA_WIN)
 458   {
 459   }
 460
 461   DISABLE_COPY_AND_ASSIGN (tui_data_window);
 462
 463   void clear_detail () override;
 464   void refresh_all () override;
 465
 466   void set_new_height (int height) override;
 467
 468   void refresh_window () override;
 469
 470   const char *name () const override
 471   {
 472     return DATA_NAME;
 473   }
 474
 475   /* Windows that are used to display registers.  */
 476   std::vector<std::unique_ptr<tui_data_item_window>> regs_content;
 477   int regs_column_count = 0;
 478   /* Should regs be displayed at all?  */
 479   bool display_regs = false;
 480   struct reggroup *current_group = nullptr;
 481
 482 protected:
 483
 484   void do_scroll_vertical (int num_to_scroll) override;
 485   void do_scroll_horizontal (int num_to_scroll) override
 486   {
 487   }
 488   void do_make_visible_with_new_height () override;
 489
 490   /* Return the index of the first element displayed.  If none are
 491      displayed, then return -1.  */
 492   int first_data_item_displayed ();
 493 };
 494
 495 struct tui_cmd_window : public tui_win_info
 496 {
 497   tui_cmd_window ()
 498     : tui_win_info (CMD_WIN)
 499   {
 500     can_highlight = false;
 501   }
 502
 503   DISABLE_COPY_AND_ASSIGN (tui_cmd_window);
 504
 505   void clear_detail () override;
 506
 507   void make_visible (bool visible) override
 508   {
 509   }
 510
 511   int max_height () const override;
 512
 513   void refresh_window () override
 514   {
 515   }
 516
 517   const char *name () const override
 518   {
 519     return CMD_NAME;
 520   }
 521
 522   int start_line = 0;
 523
 524 protected:
 525
 526   void do_scroll_vertical (int num_to_scroll) override
 527   {
 528   }
 529
 530   void do_scroll_horizontal (int num_to_scroll) override
 531   {
 532   }
 533
 534   void do_make_visible_with_new_height () override;
 535 };
 536
 537 extern int tui_win_is_auxiliary (enum tui_win_type win_type);
 538
 539
 540 /* Global Data.  */
 541 extern struct tui_win_info *tui_win_list[MAX_MAJOR_WINDOWS];
 542
 543 #define TUI_SRC_WIN     ((tui_source_window_base *) tui_win_list[SRC_WIN])
 544 #define TUI_DISASM_WIN  ((tui_source_window_base *) tui_win_list[DISASSEM_WIN])
 545 #define TUI_DATA_WIN    ((tui_data_window *) tui_win_list[DATA_WIN])
 546 #define TUI_CMD_WIN     ((tui_cmd_window *) tui_win_list[CMD_WIN])
 547
 548 /* Data Manipulation Functions.  */
 549 extern void tui_initialize_static_data (void);
 550 extern struct tui_win_info *tui_partial_win_by_name (const char *);
 551 extern enum tui_layout_type tui_current_layout (void);
 552 extern void tui_set_current_layout_to (enum tui_layout_type);
 553 extern int tui_term_height (void);
 554 extern void tui_set_term_height_to (int);
 555 extern int tui_term_width (void);
 556 extern void tui_set_term_width_to (int);
 557 extern struct tui_locator_window *tui_locator_win_info_ptr (void);
 558 extern std::vector<tui_source_window_base *> &tui_source_windows ();
 559 extern void tui_clear_source_windows (void);
 560 extern void tui_clear_source_windows_detail (void);
 561 extern void tui_add_to_source_windows (struct tui_source_window_base *);
 562 extern struct tui_win_info *tui_win_with_focus (void);
 563 extern void tui_set_win_with_focus (struct tui_win_info *);
 564 extern struct tui_layout_def *tui_layout_def (void);
 565 extern int tui_win_resized (void);
 566 extern void tui_set_win_resized_to (int);
 567
 568 extern struct tui_win_info *tui_next_win (struct tui_win_info *);
 569 extern struct tui_win_info *tui_prev_win (struct tui_win_info *);
 570
 571 extern unsigned int tui_tab_width;
 572
 573 #endif /* TUI_TUI_DATA_H */