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 #include "observable.h"
  28
  29 /* This is a point definition.  */
  30 struct tui_point
  31 {
  32   int x, y;
  33 };
  34
  35 /* Generic window information.  */
  36 struct tui_gen_win_info
  37 {
  38 protected:
  39
  40   explicit tui_gen_win_info (enum tui_win_type t)
  41     : type (t)
  42   {
  43   }
  44
  45 public:
  46
  47   virtual ~tui_gen_win_info ();
  48
  49   /* Call to refresh this window.  */
  50   virtual void refresh_window ();
  51
  52   /* Make this window visible or invisible.  */
  53   virtual void make_visible (bool visible);
  54
  55   /* Return the name of this type of window.  */
  56   virtual const char *name () const
  57   {
  58     return "";
  59   }
  60
  61   /* Reset this window.  The parameters are used to set the window's
  62      size and position.  */
  63   virtual void reset (int height, int width,
  64                       int origin_x, int origin_y);
  65
  66   /* Window handle.  */
  67   WINDOW *handle = nullptr;
  68   /* Type of window.  */
  69   enum tui_win_type type;
  70   /* Window width.  */
  71   int width = 0;
  72   /* Window height.  */
  73   int height = 0;
  74   /* Origin of window.  */
  75   struct tui_point origin = {0, 0};
  76   /* Viewport height.  */
  77   int viewport_height = 0;
  78   /* Index of last visible line.  */
  79   int last_visible_line = 0;
  80   /* Whether the window is visible or not.  */
  81   bool is_visible = false;
  82   /* Window title to display.  */
  83   char *title = nullptr;
  84 };
  85
  86 /* Whether or not a window should be drawn with a box.  */
  87 enum tui_box
  88 {
  89   DONT_BOX_WINDOW = 0,
  90   BOX_WINDOW
  91 };
  92
  93 /* Constant definitions.  */
  94 #define DEFAULT_TAB_LEN         8
  95 #define NO_SRC_STRING           "[ No Source Available ]"
  96 #define NO_DISASSEM_STRING      "[ No Assembly Available ]"
  97 #define NO_REGS_STRING          "[ Register Values Unavailable ]"
  98 #define NO_DATA_STRING          "[ No Data Values Displayed ]"
  99 #define SRC_NAME                "src"
 100 #define CMD_NAME                "cmd"
 101 #define DATA_NAME               "regs"
 102 #define DISASSEM_NAME           "asm"
 103 #define HILITE                  TRUE
 104 #define NO_HILITE               FALSE
 105 #define MIN_WIN_HEIGHT          3
 106 #define MIN_CMD_WIN_HEIGHT      3
 107
 108 /* Strings to display in the TUI status line.  */
 109 #define PROC_PREFIX             "In: "
 110 #define LINE_PREFIX             "L"
 111 #define PC_PREFIX               "PC: "
 112 #define SINGLE_KEY              "(SingleKey)"
 113
 114 /* Minimum/Maximum length of some fields displayed in the TUI status
 115    line.  */
 116 #define MIN_LINE_WIDTH     4    /* Use at least 4 digits for line
 117                                    numbers.  */
 118 #define MIN_PROC_WIDTH    12
 119 #define MAX_TARGET_WIDTH  10
 120 #define MAX_PID_WIDTH     19
 121
 122 /* The kinds of layouts available.  */
 123 enum tui_layout_type
 124 {
 125   SRC_COMMAND,
 126   DISASSEM_COMMAND,
 127   SRC_DISASSEM_COMMAND,
 128   SRC_DATA_COMMAND,
 129   DISASSEM_DATA_COMMAND,
 130   UNDEFINED_LAYOUT
 131 };
 132
 133 enum tui_line_or_address_kind
 134 {
 135   LOA_LINE,
 136   LOA_ADDRESS
 137 };
 138
 139 /* Structure describing source line or line address.  */
 140 struct tui_line_or_address
 141 {
 142   enum tui_line_or_address_kind loa;
 143   union
 144     {
 145       int line_no;
 146       CORE_ADDR addr;
 147     } u;
 148 };
 149
 150 /* Current Layout definition.  */
 151 struct tui_layout_def
 152 {
 153   enum tui_win_type display_mode;
 154 };
 155
 156 /* Flags to tell what kind of breakpoint is at current line.  */
 157 enum tui_bp_flag
 158 {
 159   TUI_BP_ENABLED = 0x01,
 160   TUI_BP_DISABLED = 0x02,
 161   TUI_BP_HIT = 0x04,
 162   TUI_BP_CONDITIONAL = 0x08,
 163   TUI_BP_HARDWARE = 0x10
 164 };
 165
 166 DEF_ENUM_FLAGS_TYPE (enum tui_bp_flag, tui_bp_flags);
 167
 168 /* Elements in the Source/Disassembly Window.  */
 169 struct tui_source_element
 170 {
 171   tui_source_element ()
 172   {
 173     line_or_addr.loa = LOA_LINE;
 174     line_or_addr.u.line_no = 0;
 175   }
 176
 177   ~tui_source_element ()
 178   {
 179     xfree (line);
 180   }
 181
 182   char *line = nullptr;
 183   struct tui_line_or_address line_or_addr;
 184   bool is_exec_point = false;
 185   tui_bp_flags break_mode = 0;
 186 };
 187
 188
 189 #ifdef PATH_MAX
 190 # define MAX_LOCATOR_ELEMENT_LEN        PATH_MAX
 191 #else
 192 # define MAX_LOCATOR_ELEMENT_LEN        1024
 193 #endif
 194
 195 /* Position of breakpoint markers in the exec info string.  */
 196 #define TUI_BP_HIT_POS      0
 197 #define TUI_BP_BREAK_POS    1
 198 #define TUI_EXEC_POS        2
 199 #define TUI_EXECINFO_SIZE   4
 200
 201 typedef char tui_exec_info_content[TUI_EXECINFO_SIZE];
 202
 203 /* Execution info window class.  */
 204
 205 struct tui_exec_info_window : public tui_gen_win_info
 206 {
 207   tui_exec_info_window ()
 208     : tui_gen_win_info (EXEC_INFO_WIN)
 209   {
 210   }
 211
 212   ~tui_exec_info_window () override
 213   {
 214     xfree (m_content);
 215   }
 216
 217   /* Get or allocate contents.  */
 218   tui_exec_info_content *maybe_allocate_content (int n_elements);
 219
 220   /* Return the contents.  */
 221   const tui_exec_info_content *get_content () const
 222   {
 223     return m_content;
 224   }
 225
 226 private:
 227
 228   tui_exec_info_content *m_content = nullptr;
 229 };
 230
 231 /* Locator window class.  */
 232
 233 struct tui_locator_window : public tui_gen_win_info
 234 {
 235   tui_locator_window ()
 236     : tui_gen_win_info (LOCATOR_WIN)
 237   {
 238     full_name[0] = 0;
 239     proc_name[0] = 0;
 240   }
 241
 242   char full_name[MAX_LOCATOR_ELEMENT_LEN];
 243   char proc_name[MAX_LOCATOR_ELEMENT_LEN];
 244   int line_no = 0;
 245   CORE_ADDR addr = 0;
 246   /* Architecture associated with code at this location.  */
 247   struct gdbarch *gdbarch = nullptr;
 248 };
 249
 250 /* A data item window.  */
 251
 252 struct tui_data_item_window : public tui_gen_win_info
 253 {
 254   tui_data_item_window ()
 255     : tui_gen_win_info (DATA_ITEM_WIN)
 256   {
 257   }
 258
 259   ~tui_data_item_window () override;
 260
 261   const char *name = nullptr;
 262   /* The register number, or data display number.  */
 263   int item_no = -1;
 264   void *value = nullptr;
 265   bool highlight = false;
 266   char *content = nullptr;
 267 };
 268
 269 /* This defines information about each logical window.  */
 270 struct tui_win_info : public tui_gen_win_info
 271 {
 272 protected:
 273
 274   explicit tui_win_info (enum tui_win_type type);
 275   DISABLE_COPY_AND_ASSIGN (tui_win_info);
 276
 277   /* Scroll the contents vertically.  This is only called via
 278      forward_scroll and backward_scroll.  */
 279   virtual void do_scroll_vertical (int num_to_scroll) = 0;
 280
 281   /* Scroll the contents horizontally.  This is only called via
 282      left_scroll and right_scroll.  */
 283   virtual void do_scroll_horizontal (int num_to_scroll) = 0;
 284
 285   /* Called after make_visible_with_new_height sets the new height.
 286      Should update the window.  */
 287   virtual void do_make_visible_with_new_height () = 0;
 288
 289 public:
 290
 291   ~tui_win_info () override
 292   {
 293   }
 294
 295   /* Clear the pertinent detail in the window.  */
 296   virtual void clear_detail () = 0;
 297
 298   /* Return true if this window has the locator.  */
 299   virtual bool has_locator () const
 300   {
 301     return false;
 302   }
 303
 304   /* Called after all the TUI windows are refreshed, to let this
 305      window have a chance to update itself further.  */
 306   virtual void refresh_all ()
 307   {
 308   }
 309
 310   /* Called after a TUI window is given a new height; this updates any
 311      related auxiliary windows.  */
 312   virtual void set_new_height (int height)
 313   {
 314   }
 315
 316   /* Compute the maximum height of this window.  */
 317   virtual int max_height () const;
 318
 319   /* Called after the tab width has been changed.  */
 320   virtual void update_tab_width ()
 321   {
 322   }
 323
 324   /* Make the window visible after the height has been changed.  */
 325   void make_visible_with_new_height ();
 326
 327   /* Set whether this window is highglighted.  */
 328   void set_highlight (bool highlight)
 329   {
 330     is_highlighted = highlight;
 331   }
 332
 333   /* Methods to scroll the contents of this window.  Note that they
 334      are named with "_scroll" coming at the end because the more
 335      obvious "scroll_forward" is defined as a macro in term.h.  */
 336   void forward_scroll (int num_to_scroll);
 337   void backward_scroll (int num_to_scroll);
 338   void left_scroll (int num_to_scroll);
 339   void right_scroll (int num_to_scroll);
 340
 341   /* Return true if this window can be scrolled, false otherwise.  */
 342   virtual bool can_scroll () const
 343   {
 344     return true;
 345   }
 346
 347   /* Can this window ever be highlighted?  */
 348   bool can_highlight = true;
 349
 350   /* Is this window highlighted?  */
 351   bool is_highlighted = false;
 352 };
 353
 354 /* The base class for all source-like windows, namely the source and
 355    disassembly windows.  */
 356
 357 struct tui_source_window_base : public tui_win_info
 358 {
 359 protected:
 360   explicit tui_source_window_base (enum tui_win_type type);
 361   ~tui_source_window_base () override;
 362   DISABLE_COPY_AND_ASSIGN (tui_source_window_base);
 363
 364   void do_scroll_horizontal (int num_to_scroll) override;
 365   void do_make_visible_with_new_height () override;
 366
 367 public:
 368
 369   void clear_detail () override;
 370
 371   /* Return true if this window has the locator.  */
 372   bool has_locator () const override
 373   {
 374     return m_has_locator;
 375   }
 376
 377   void make_visible (bool visible) override;
 378   void refresh_window () override;
 379   void refresh_all () override;
 380
 381   /* Refill the source window's source cache and update it.  If this
 382      is a disassembly window, then just update it.  */
 383   void refill ();
 384
 385   /* Set the location of the execution point.  */
 386   void set_is_exec_point_at (struct tui_line_or_address l);
 387
 388   void set_new_height (int height) override;
 389
 390   void update_tab_width () override;
 391
 392   /* Return true if the location LOC corresponds to the line number
 393      LINE_NO in this source window; false otherwise.  */
 394   virtual bool location_matches_p (struct bp_location *loc, int line_no) = 0;
 395
 396   void reset (int height, int width,
 397               int origin_x, int origin_y) override;
 398
 399   /* Does the locator belong to this window?  */
 400   bool m_has_locator = false;
 401   /* Execution information window.  */
 402   struct tui_exec_info_window *execution_info;
 403   /* Used for horizontal scroll.  */
 404   int horizontal_offset = 0;
 405   struct tui_line_or_address start_line_or_addr;
 406
 407   /* It is the resolved form as returned by symtab_to_fullname.  */
 408   char *fullname = nullptr;
 409
 410   /* Architecture associated with code at this location.  */
 411   struct gdbarch *gdbarch = nullptr;
 412
 413   std::vector<tui_source_element> content;
 414 };
 415
 416 /* A TUI source window.  */
 417
 418 struct tui_source_window : public tui_source_window_base
 419 {
 420   tui_source_window ();
 421   ~tui_source_window ();
 422
 423   DISABLE_COPY_AND_ASSIGN (tui_source_window);
 424
 425   const char *name () const override
 426   {
 427     return SRC_NAME;
 428   }
 429
 430   bool location_matches_p (struct bp_location *loc, int line_no) override;
 431
 432   bool showing_source_p (const char *filename) const;
 433
 434 protected:
 435
 436   void do_scroll_vertical (int num_to_scroll) override;
 437
 438 private:
 439
 440   void style_changed ();
 441
 442   /* A token used to register and unregister an observer.  */
 443   gdb::observers::token m_observable;
 444 };
 445
 446 /* A TUI disassembly window.  */
 447
 448 struct tui_disasm_window : public tui_source_window_base
 449 {
 450   tui_disasm_window ()
 451     : tui_source_window_base (DISASSEM_WIN)
 452   {
 453   }
 454
 455   DISABLE_COPY_AND_ASSIGN (tui_disasm_window);
 456
 457   const char *name () const override
 458   {
 459     return DISASSEM_NAME;
 460   }
 461
 462   bool location_matches_p (struct bp_location *loc, int line_no) override;
 463
 464 protected:
 465
 466   void do_scroll_vertical (int num_to_scroll) override;
 467 };
 468
 469 struct tui_data_window : public tui_win_info
 470 {
 471   tui_data_window ()
 472     : tui_win_info (DATA_WIN)
 473   {
 474   }
 475
 476   DISABLE_COPY_AND_ASSIGN (tui_data_window);
 477
 478   void clear_detail () override;
 479   void refresh_all () override;
 480
 481   void set_new_height (int height) override;
 482
 483   void refresh_window () override;
 484
 485   const char *name () const override
 486   {
 487     return DATA_NAME;
 488   }
 489
 490   /* Windows that are used to display registers.  */
 491   std::vector<std::unique_ptr<tui_data_item_window>> regs_content;
 492   int regs_column_count = 0;
 493   /* Should regs be displayed at all?  */
 494   bool display_regs = false;
 495   struct reggroup *current_group = nullptr;
 496
 497   /* Answer the number of the last line in the regs display.  If there
 498      are no registers (-1) is returned.  */
 499   int last_regs_line_no () const;
 500
 501   /* Answer the line number that the register element at element_no is
 502      on.  If element_no is greater than the number of register
 503      elements there are, -1 is returned.  */
 504   int line_from_reg_element_no (int element_no) const;
 505
 506   /* Answer the index of the first element in line_no.  If line_no is
 507      past the register area (-1) is returned.  */
 508   int first_reg_element_no_inline (int line_no) const;
 509
 510   /* Displays the data that is in the data window's content.  It does
 511      not set the content.  */
 512   void display_all_data ();
 513
 514   /* Delete all the item windows in the data window.  This is usually
 515      done when the data window is scrolled.  */
 516   void delete_data_content_windows ();
 517
 518   void erase_data_content (const char *prompt);
 519
 520   /* Display the registers in the content from 'start_element_no'
 521      until the end of the register content or the end of the display
 522      height.  No checking for displaying past the end of the registers
 523      is done here.  */
 524   void display_registers_from (int start_element_no);
 525
 526   /* Display the registers starting at line line_no in the data
 527      window.  Answers the line number that the display actually
 528      started from.  If nothing is displayed (-1) is returned.  */
 529   int display_registers_from_line (int line_no);
 530
 531 protected:
 532
 533   void do_scroll_vertical (int num_to_scroll) override;
 534   void do_scroll_horizontal (int num_to_scroll) override
 535   {
 536   }
 537   void do_make_visible_with_new_height () override;
 538
 539   /* Return the index of the first element displayed.  If none are
 540      displayed, then return -1.  */
 541   int first_data_item_displayed ();
 542
 543   /* Display the registers in the content from 'start_element_no' on
 544      'start_line_no' until the end of the register content or the end
 545      of the display height.  This function checks that we won't
 546      display off the end of the register display.  */
 547   void display_reg_element_at_line (int start_element_no, int start_line_no);
 548 };
 549
 550 struct tui_cmd_window : public tui_win_info
 551 {
 552   tui_cmd_window ()
 553     : tui_win_info (CMD_WIN)
 554   {
 555     can_highlight = false;
 556   }
 557
 558   DISABLE_COPY_AND_ASSIGN (tui_cmd_window);
 559
 560   void clear_detail () override;
 561
 562   void make_visible (bool visible) override
 563   {
 564   }
 565
 566   int max_height () const override;
 567
 568   void refresh_window () override
 569   {
 570   }
 571
 572   const char *name () const override
 573   {
 574     return CMD_NAME;
 575   }
 576
 577   bool can_scroll () const override
 578   {
 579     return false;
 580   }
 581
 582   int start_line = 0;
 583
 584 protected:
 585
 586   void do_scroll_vertical (int num_to_scroll) override
 587   {
 588   }
 589
 590   void do_scroll_horizontal (int num_to_scroll) override
 591   {
 592   }
 593
 594   void do_make_visible_with_new_height () override;
 595 };
 596
 597 extern int tui_win_is_auxiliary (enum tui_win_type win_type);
 598
 599
 600 /* Global Data.  */
 601 extern struct tui_win_info *tui_win_list[MAX_MAJOR_WINDOWS];
 602
 603 #define TUI_SRC_WIN     ((tui_source_window *) tui_win_list[SRC_WIN])
 604 #define TUI_DISASM_WIN  ((tui_source_window_base *) tui_win_list[DISASSEM_WIN])
 605 #define TUI_DATA_WIN    ((tui_data_window *) tui_win_list[DATA_WIN])
 606 #define TUI_CMD_WIN     ((tui_cmd_window *) tui_win_list[CMD_WIN])
 607
 608 /* An iterator that iterates over all windows.  */
 609
 610 class tui_window_iterator
 611 {
 612 public:
 613
 614   typedef tui_window_iterator self_type;
 615   typedef struct tui_win_info *value_type;
 616   typedef struct tui_win_info *&reference;
 617   typedef struct tui_win_info **pointer;
 618   typedef std::forward_iterator_tag iterator_category;
 619   typedef int difference_type;
 620
 621   explicit tui_window_iterator (enum tui_win_type type)
 622     : m_type (type)
 623   {
 624     advance ();
 625   }
 626
 627   tui_window_iterator ()
 628     : m_type (MAX_MAJOR_WINDOWS)
 629   {
 630   }
 631
 632   bool operator!= (const self_type &other) const
 633   {
 634     return m_type != other.m_type;
 635   }
 636
 637   value_type operator* () const
 638   {
 639     gdb_assert (m_type < MAX_MAJOR_WINDOWS);
 640     return tui_win_list[m_type];
 641   }
 642
 643   self_type &operator++ ()
 644   {
 645     ++m_type;
 646     advance ();
 647     return *this;
 648   }
 649
 650 private:
 651
 652   void advance ()
 653   {
 654     while (m_type < MAX_MAJOR_WINDOWS && tui_win_list[m_type] == nullptr)
 655       ++m_type;
 656   }
 657
 658   int m_type;
 659 };
 660
 661 /* A range adapter for iterating over TUI windows.  */
 662
 663 struct all_tui_windows
 664 {
 665   tui_window_iterator begin () const
 666   {
 667     return tui_window_iterator (SRC_WIN);
 668   }
 669
 670   tui_window_iterator end () const
 671   {
 672     return tui_window_iterator ();
 673   }
 674 };
 675
 676
 677 /* Data Manipulation Functions.  */
 678 extern void tui_initialize_static_data (void);
 679 extern struct tui_win_info *tui_partial_win_by_name (const char *);
 680 extern enum tui_layout_type tui_current_layout (void);
 681 extern void tui_set_current_layout_to (enum tui_layout_type);
 682 extern int tui_term_height (void);
 683 extern void tui_set_term_height_to (int);
 684 extern int tui_term_width (void);
 685 extern void tui_set_term_width_to (int);
 686 extern struct tui_locator_window *tui_locator_win_info_ptr (void);
 687 extern std::vector<tui_source_window_base *> &tui_source_windows ();
 688 extern void tui_clear_source_windows (void);
 689 extern void tui_clear_source_windows_detail (void);
 690 extern void tui_add_to_source_windows (struct tui_source_window_base *);
 691 extern struct tui_win_info *tui_win_with_focus (void);
 692 extern void tui_set_win_with_focus (struct tui_win_info *);
 693 extern struct tui_layout_def *tui_layout_def (void);
 694 extern int tui_win_resized (void);
 695 extern void tui_set_win_resized_to (int);
 696
 697 extern struct tui_win_info *tui_next_win (struct tui_win_info *);
 698 extern struct tui_win_info *tui_prev_win (struct tui_win_info *);
 699
 700 extern unsigned int tui_tab_width;
 701
 702 #endif /* TUI_TUI_DATA_H */