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- /* TUI display locator.
- Copyright (C) 1998-2022 Free Software Foundation, Inc.
- Contributed by Hewlett-Packard Company.
- This file is part of GDB.
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 3 of the License, or
- (at your option) any later version.
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
- You should have received a copy of the GNU General Public License
- along with this program. If not, see <http://www.gnu.org/licenses/>. */
- #include "defs.h"
- #include "symtab.h"
- #include "breakpoint.h"
- #include "frame.h"
- #include "command.h"
- #include "inferior.h"
- #include "target.h"
- #include "top.h"
- #include "gdb-demangle.h"
- #include "source.h"
- #include "tui/tui.h"
- #include "tui/tui-data.h"
- #include "tui/tui-stack.h"
- #include "tui/tui-wingeneral.h"
- #include "tui/tui-source.h"
- #include "tui/tui-winsource.h"
- #include "tui/tui-file.h"
- #include "tui/tui-location.h"
- #include "gdb_curses.h"
- #define PROC_PREFIX "In: "
- #define LINE_PREFIX "L"
- #define PC_PREFIX "PC: "
- /* Strings to display in the TUI status line. */
- #define SINGLE_KEY "(SingleKey)"
- /* Minimum/Maximum length of some fields displayed in the TUI status
- line. */
- #define MIN_LINE_WIDTH 4 /* Use at least 4 digits for line
- numbers. */
- #define MIN_PROC_WIDTH 12
- #define MAX_TARGET_WIDTH 10
- #define MAX_PID_WIDTH 19
- std::string
- tui_locator_window::make_status_line () const
- {
- char line_buf[50];
- int status_size;
- int proc_width;
- const char *pid_name;
- int target_width;
- int pid_width;
- int line_width;
- std::string pid_name_holder;
- if (inferior_ptid == null_ptid)
- pid_name = "No process";
- else
- {
- pid_name_holder = target_pid_to_str (inferior_ptid);
- pid_name = pid_name_holder.c_str ();
- }
- target_width = strlen (target_shortname ());
- if (target_width > MAX_TARGET_WIDTH)
- target_width = MAX_TARGET_WIDTH;
- pid_width = strlen (pid_name);
- if (pid_width > MAX_PID_WIDTH)
- pid_width = MAX_PID_WIDTH;
- status_size = width;
- /* Translate line number and obtain its size. */
- int line_no = tui_location.line_no ();
- if (line_no > 0)
- xsnprintf (line_buf, sizeof (line_buf), "%d", line_no);
- else
- strcpy (line_buf, "??");
- line_width = strlen (line_buf);
- if (line_width < MIN_LINE_WIDTH)
- line_width = MIN_LINE_WIDTH;
- /* Translate PC address. */
- struct gdbarch *gdbarch = tui_location.gdbarch ();
- CORE_ADDR addr = tui_location.addr ();
- std::string pc_out (gdbarch
- ? paddress (gdbarch, addr)
- : "??");
- const char *pc_buf = pc_out.c_str ();
- int pc_width = pc_out.size ();
- /* First determine the amount of proc name width we have available.
- The +1 are for a space separator between fields.
- The -1 are to take into account the \0 counted by sizeof. */
- proc_width = (status_size
- - (target_width + 1)
- - (pid_width + 1)
- - (sizeof (PROC_PREFIX) - 1 + 1)
- - (sizeof (LINE_PREFIX) - 1 + line_width + 1)
- - (sizeof (PC_PREFIX) - 1 + pc_width + 1)
- - (tui_current_key_mode == TUI_SINGLE_KEY_MODE
- ? (sizeof (SINGLE_KEY) - 1 + 1)
- : 0));
- /* If there is no room to print the function name, try by removing
- some fields. */
- if (proc_width < MIN_PROC_WIDTH)
- {
- proc_width += target_width + 1;
- target_width = 0;
- if (proc_width < MIN_PROC_WIDTH)
- {
- proc_width += pid_width + 1;
- pid_width = 0;
- if (proc_width <= MIN_PROC_WIDTH)
- {
- proc_width += pc_width + sizeof (PC_PREFIX) - 1 + 1;
- pc_width = 0;
- if (proc_width < 0)
- {
- proc_width += line_width + sizeof (LINE_PREFIX) - 1 + 1;
- line_width = 0;
- if (proc_width < 0)
- proc_width = 0;
- }
- }
- }
- }
- /* Now create the locator line from the string version of the
- elements. */
- string_file string;
- if (target_width > 0)
- string.printf ("%*.*s ", -target_width, target_width, target_shortname ());
- if (pid_width > 0)
- string.printf ("%*.*s ", -pid_width, pid_width, pid_name);
- /* Show whether we are in SingleKey mode. */
- if (tui_current_key_mode == TUI_SINGLE_KEY_MODE)
- {
- string.puts (SINGLE_KEY);
- string.puts (" ");
- }
- /* Procedure/class name. */
- if (proc_width > 0)
- {
- const std::string &proc_name = tui_location.proc_name ();
- if (proc_name.size () > proc_width)
- string.printf ("%s%*.*s* ", PROC_PREFIX,
- 1 - proc_width, proc_width - 1, proc_name.c_str ());
- else
- string.printf ("%s%*.*s ", PROC_PREFIX,
- -proc_width, proc_width, proc_name.c_str ());
- }
- if (line_width > 0)
- string.printf ("%s%*.*s ", LINE_PREFIX,
- -line_width, line_width, line_buf);
- if (pc_width > 0)
- {
- string.puts (PC_PREFIX);
- string.puts (pc_buf);
- }
- std::string string_val = string.release ();
- if (string.size () < status_size)
- string_val.append (status_size - string.size (), ' ');
- else if (string.size () > status_size)
- string_val.erase (status_size, string.size ());
- return string_val;
- }
- /* Get a printable name for the function at the address. The symbol
- name is demangled if demangling is turned on. Returns a pointer to
- a static area holding the result. */
- static char*
- tui_get_function_from_frame (struct frame_info *fi)
- {
- static char name[256];
- string_file stream;
- print_address_symbolic (get_frame_arch (fi), get_frame_pc (fi),
- &stream, demangle, "");
- /* Use simple heuristics to isolate the function name. The symbol
- can be demangled and we can have function parameters. Remove
- them because the status line is too short to display them. */
- const char *d = stream.c_str ();
- if (*d == '<')
- d++;
- strncpy (name, d, sizeof (name) - 1);
- name[sizeof (name) - 1] = 0;
- char *p = strchr (name, '(');
- if (!p)
- p = strchr (name, '>');
- if (p)
- *p = 0;
- p = strchr (name, '+');
- if (p)
- *p = 0;
- return name;
- }
- void
- tui_locator_window::rerender ()
- {
- gdb_assert (handle != NULL);
- std::string string = make_status_line ();
- scrollok (handle.get (), FALSE);
- wmove (handle.get (), 0, 0);
- /* We ignore the return value from wstandout and wstandend, casting them
- to void in order to avoid a compiler warning. The warning itself was
- introduced by a patch to ncurses 5.7 dated 2009-08-29, changing these
- macro to expand to code that causes the compiler to generate an
- unused-value warning. */
- (void) wstandout (handle.get ());
- waddstr (handle.get (), string.c_str ());
- wclrtoeol (handle.get ());
- (void) wstandend (handle.get ());
- refresh_window ();
- wmove (handle.get (), 0, 0);
- }
- /* Function to print the frame information for the TUI. The windows are
- refreshed only if frame information has changed since the last refresh.
- Return true if frame information has changed (and windows
- subsequently refreshed), false otherwise. */
- bool
- tui_show_frame_info (struct frame_info *fi)
- {
- bool locator_changed_p;
- if (fi != nullptr)
- {
- symtab_and_line sal = find_frame_sal (fi);
- const char *func_name;
- /* find_frame_sal does not always set PC, but we want to ensure
- that it is available in the SAL. */
- if (get_frame_pc_if_available (fi, &sal.pc))
- func_name = tui_get_function_from_frame (fi);
- else
- func_name = _("<unavailable>");
- locator_changed_p
- = tui_location.set_location (get_frame_arch (fi), sal, func_name);
- /* If the locator information has not changed, then frame information has
- not changed. If frame information has not changed, then the windows'
- contents will not change. So don't bother refreshing the windows. */
- if (!locator_changed_p)
- return false;
- for (struct tui_source_window_base *win_info : tui_source_windows ())
- {
- win_info->maybe_update (fi, sal);
- win_info->update_exec_info ();
- }
- }
- else
- {
- symtab_and_line sal {};
- locator_changed_p = tui_location.set_location (NULL, sal, "");
- if (!locator_changed_p)
- return false;
- for (struct tui_source_window_base *win_info : tui_source_windows ())
- win_info->erase_source_content ();
- }
- return true;
- }
- void
- tui_show_locator_content ()
- {
- if (tui_is_window_visible (STATUS_WIN))
- TUI_STATUS_WIN->rerender ();
- }
- /* Command to update the display with the current execution point. */
- static void
- tui_update_command (const char *arg, int from_tty)
- {
- execute_command ("frame 0", from_tty);
- }
- /* Function to initialize gdb commands, for tui window stack
- manipulation. */
- void _initialize_tui_stack ();
- void
- _initialize_tui_stack ()
- {
- add_com ("update", class_tui, tui_update_command,
- _("Update the source window and locator to "
- "display the current execution point.\n\
- Usage: update"));
- }
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