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