9923f347c4
This changes two members of tui_locator_window to have type std::string. This removes a static limit. gdb/ChangeLog 2019-09-20 Tom Tromey <tom@tromey.com> * tui/tui-stack.h (MAX_LOCATOR_ELEMENT_LEN): Remove define. (struct tui_locator_window) <full_name, proc_name>: Now std::string. * tui/tui-stack.c (tui_locator_window::make_status_line) (tui_locator_window::set_locator_fullname) (tui_locator_window::set_locator_info): Update. * tui/tui-source.c (tui_source_window::set_contents) (tui_source_window::showing_source_p): Update.
389 lines
10 KiB
C
389 lines
10 KiB
C
/* TUI display locator.
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Copyright (C) 1998-2019 Free Software Foundation, Inc.
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Contributed by Hewlett-Packard Company.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include "defs.h"
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#include "symtab.h"
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#include "breakpoint.h"
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#include "frame.h"
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#include "command.h"
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#include "inferior.h"
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#include "target.h"
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#include "top.h"
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#include "gdb-demangle.h"
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#include "source.h"
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#include "tui/tui.h"
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#include "tui/tui-data.h"
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#include "tui/tui-stack.h"
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#include "tui/tui-wingeneral.h"
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#include "tui/tui-source.h"
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#include "tui/tui-winsource.h"
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#include "tui/tui-file.h"
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#include "gdb_curses.h"
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#define PROC_PREFIX "In: "
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#define LINE_PREFIX "L"
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#define PC_PREFIX "PC: "
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/* Minimum/Maximum length of some fields displayed in the TUI status
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line. */
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#define MIN_LINE_WIDTH 4 /* Use at least 4 digits for line
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numbers. */
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#define MIN_PROC_WIDTH 12
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#define MAX_TARGET_WIDTH 10
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#define MAX_PID_WIDTH 19
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static struct tui_locator_window _locator;
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/* Accessor for the locator win info. Answers a pointer to the static
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locator win info struct. */
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struct tui_locator_window *
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tui_locator_win_info_ptr (void)
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{
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return &_locator;
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}
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std::string
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tui_locator_window::make_status_line () const
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{
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char line_buf[50];
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int status_size;
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int proc_width;
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const char *pid_name;
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int target_width;
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int pid_width;
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int line_width;
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std::string pid_name_holder;
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if (inferior_ptid == null_ptid)
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pid_name = "No process";
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else
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{
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pid_name_holder = target_pid_to_str (inferior_ptid);
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pid_name = pid_name_holder.c_str ();
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}
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target_width = strlen (target_shortname);
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if (target_width > MAX_TARGET_WIDTH)
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target_width = MAX_TARGET_WIDTH;
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pid_width = strlen (pid_name);
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if (pid_width > MAX_PID_WIDTH)
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pid_width = MAX_PID_WIDTH;
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status_size = width;
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/* Translate line number and obtain its size. */
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if (line_no > 0)
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xsnprintf (line_buf, sizeof (line_buf), "%d", line_no);
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else
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strcpy (line_buf, "??");
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line_width = strlen (line_buf);
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if (line_width < MIN_LINE_WIDTH)
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line_width = MIN_LINE_WIDTH;
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/* Translate PC address. */
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std::string pc_out (gdbarch
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? paddress (gdbarch, addr)
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: "??");
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const char *pc_buf = pc_out.c_str ();
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int pc_width = pc_out.size ();
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/* First determine the amount of proc name width we have available.
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The +1 are for a space separator between fields.
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The -1 are to take into account the \0 counted by sizeof. */
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proc_width = (status_size
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- (target_width + 1)
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- (pid_width + 1)
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- (sizeof (PROC_PREFIX) - 1 + 1)
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- (sizeof (LINE_PREFIX) - 1 + line_width + 1)
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- (sizeof (PC_PREFIX) - 1 + pc_width + 1)
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- (tui_current_key_mode == TUI_SINGLE_KEY_MODE
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? (sizeof (SINGLE_KEY) - 1 + 1)
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: 0));
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/* If there is no room to print the function name, try by removing
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some fields. */
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if (proc_width < MIN_PROC_WIDTH)
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{
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proc_width += target_width + 1;
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target_width = 0;
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if (proc_width < MIN_PROC_WIDTH)
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{
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proc_width += pid_width + 1;
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pid_width = 0;
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if (proc_width <= MIN_PROC_WIDTH)
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{
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proc_width += pc_width + sizeof (PC_PREFIX) - 1 + 1;
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pc_width = 0;
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if (proc_width < 0)
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{
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proc_width += line_width + sizeof (LINE_PREFIX) - 1 + 1;
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line_width = 0;
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if (proc_width < 0)
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proc_width = 0;
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}
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}
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}
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}
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/* Now create the locator line from the string version of the
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elements. */
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string_file string;
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if (target_width > 0)
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string.printf ("%*.*s ", -target_width, target_width, target_shortname);
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if (pid_width > 0)
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string.printf ("%*.*s ", -pid_width, pid_width, pid_name);
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/* Show whether we are in SingleKey mode. */
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if (tui_current_key_mode == TUI_SINGLE_KEY_MODE)
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{
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string.puts (SINGLE_KEY);
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string.puts (" ");
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}
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/* Procedure/class name. */
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if (proc_width > 0)
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{
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if (proc_name.size () > proc_width)
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string.printf ("%s%*.*s* ", PROC_PREFIX,
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1 - proc_width, proc_width - 1, proc_name.c_str ());
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else
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string.printf ("%s%*.*s ", PROC_PREFIX,
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-proc_width, proc_width, proc_name.c_str ());
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}
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if (line_width > 0)
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string.printf ("%s%*.*s ", LINE_PREFIX,
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-line_width, line_width, line_buf);
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if (pc_width > 0)
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{
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string.puts (PC_PREFIX);
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string.puts (pc_buf);
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}
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if (string.size () < status_size)
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string.puts (n_spaces (status_size - string.size ()));
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else if (string.size () > status_size)
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string.string ().erase (status_size, string.size ());
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return std::move (string.string ());
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}
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/* Get a printable name for the function at the address. The symbol
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name is demangled if demangling is turned on. Returns a pointer to
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a static area holding the result. */
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static char*
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tui_get_function_from_frame (struct frame_info *fi)
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{
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static char name[256];
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string_file stream;
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print_address_symbolic (get_frame_arch (fi), get_frame_pc (fi),
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&stream, demangle, "");
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/* Use simple heuristics to isolate the function name. The symbol
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can be demangled and we can have function parameters. Remove
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them because the status line is too short to display them. */
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const char *d = stream.c_str ();
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if (*d == '<')
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d++;
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strncpy (name, d, sizeof (name) - 1);
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name[sizeof (name) - 1] = 0;
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char *p = strchr (name, '(');
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if (!p)
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p = strchr (name, '>');
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if (p)
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*p = 0;
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p = strchr (name, '+');
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if (p)
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*p = 0;
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return name;
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}
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void
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tui_locator_window::rerender ()
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{
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if (handle != NULL)
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{
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std::string string = make_status_line ();
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scrollok (handle, FALSE);
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wmove (handle, 0, 0);
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/* We ignore the return value from wstandout and wstandend, casting
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them to void in order to avoid a compiler warning. The warning
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itself was introduced by a patch to ncurses 5.7 dated 2009-08-29,
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changing these macro to expand to code that causes the compiler
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to generate an unused-value warning. */
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(void) wstandout (handle);
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waddstr (handle, string.c_str ());
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wclrtoeol (handle);
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(void) wstandend (handle);
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refresh_window ();
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wmove (handle, 0, 0);
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}
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}
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/* See tui-stack.h. */
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void
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tui_locator_window::set_locator_fullname (const char *fullname)
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{
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full_name = fullname;
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rerender ();
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}
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/* See tui-stack.h. */
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bool
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tui_locator_window::set_locator_info (struct gdbarch *gdbarch_in,
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const char *fullname,
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const char *procname,
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int lineno,
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CORE_ADDR addr_in)
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{
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bool locator_changed_p = false;
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if (procname == NULL)
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procname = "";
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if (fullname == NULL)
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fullname = "";
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locator_changed_p |= proc_name != procname;
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locator_changed_p |= lineno != line_no;
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locator_changed_p |= addr_in != addr;
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locator_changed_p |= gdbarch_in != gdbarch;
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locator_changed_p |= full_name != fullname;
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proc_name = procname;
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line_no = lineno;
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addr = addr_in;
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gdbarch = gdbarch_in;
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set_locator_fullname (fullname);
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return locator_changed_p;
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}
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/* Update only the full_name portion of the locator. */
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void
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tui_update_locator_fullname (const char *fullname)
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{
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struct tui_locator_window *locator = tui_locator_win_info_ptr ();
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locator->set_locator_fullname (fullname);
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}
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/* Function to print the frame information for the TUI. The windows are
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refreshed only if frame information has changed since the last refresh.
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Return 1 if frame information has changed (and windows subsequently
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refreshed), 0 otherwise. */
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int
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tui_show_frame_info (struct frame_info *fi)
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{
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bool locator_changed_p;
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struct tui_locator_window *locator = tui_locator_win_info_ptr ();
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if (fi)
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{
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CORE_ADDR pc;
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symtab_and_line sal = find_frame_sal (fi);
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const char *fullname = nullptr;
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if (sal.symtab != nullptr)
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fullname = symtab_to_fullname (sal.symtab);
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if (get_frame_pc_if_available (fi, &pc))
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locator_changed_p
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= locator->set_locator_info (get_frame_arch (fi),
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(sal.symtab == 0
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? "??" : fullname),
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tui_get_function_from_frame (fi),
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sal.line,
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pc);
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else
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locator_changed_p
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= locator->set_locator_info (get_frame_arch (fi),
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"??", _("<unavailable>"), sal.line, 0);
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/* If the locator information has not changed, then frame information has
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not changed. If frame information has not changed, then the windows'
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contents will not change. So don't bother refreshing the windows. */
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if (!locator_changed_p)
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return 0;
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for (struct tui_source_window_base *win_info : tui_source_windows ())
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{
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win_info->maybe_update (fi, sal, locator->line_no, locator->addr);
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win_info->update_exec_info ();
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}
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return 1;
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}
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else
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{
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locator_changed_p
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= locator->set_locator_info (NULL, NULL, NULL, 0, (CORE_ADDR) 0);
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if (!locator_changed_p)
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return 0;
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for (struct tui_source_window_base *win_info : tui_source_windows ())
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{
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win_info->erase_source_content ();
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win_info->update_exec_info ();
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}
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return 1;
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}
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}
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void
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tui_show_locator_content ()
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{
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struct tui_locator_window *locator = tui_locator_win_info_ptr ();
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locator->rerender ();
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}
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/* Command to update the display with the current execution point. */
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static void
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tui_update_command (const char *arg, int from_tty)
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{
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execute_command ("frame 0", from_tty);
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}
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/* Function to initialize gdb commands, for tui window stack
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manipulation. */
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void
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_initialize_tui_stack (void)
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{
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add_com ("update", class_tui, tui_update_command,
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_("Update the source window and locator to "
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"display the current execution point."));
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}
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