mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2025-01-06 12:09:26 +08:00
a6a3b67fa9
In a couple of spots, the TUI tries to center some text in the window. Andrew noticed that the calculation is done strangely and the text ends up somewhat to the left of center. This patch fixes the problem. Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=31355
597 lines
16 KiB
C
597 lines
16 KiB
C
/* TUI display registers in window.
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Copyright (C) 1998-2024 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 "arch-utils.h"
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#include "tui/tui.h"
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#include "tui/tui-data.h"
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#include "symtab.h"
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#include "gdbtypes.h"
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#include "gdbcmd.h"
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#include "frame.h"
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#include "regcache.h"
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#include "inferior.h"
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#include "target.h"
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#include "tui/tui-layout.h"
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#include "tui/tui-win.h"
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#include "tui/tui-wingeneral.h"
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#include "tui/tui-file.h"
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#include "tui/tui-regs.h"
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#include "tui/tui-io.h"
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#include "reggroups.h"
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#include "valprint.h"
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#include "completer.h"
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#include "gdb_curses.h"
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/* A subclass of string_file that expands tab characters. */
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class tab_expansion_file : public string_file
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{
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public:
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tab_expansion_file () = default;
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void write (const char *buf, long length_buf) override;
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private:
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int m_column = 0;
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};
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void
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tab_expansion_file::write (const char *buf, long length_buf)
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{
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for (long i = 0; i < length_buf; ++i)
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{
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if (buf[i] == '\t')
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{
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do
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{
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string_file::write (" ", 1);
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++m_column;
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}
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while ((m_column % 8) != 0);
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}
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else
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{
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string_file::write (&buf[i], 1);
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if (buf[i] == '\n')
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m_column = 0;
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else
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++m_column;
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}
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}
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}
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/* Get the register from the frame and return a printable
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representation of it. */
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static std::string
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tui_register_format (const frame_info_ptr &frame, int regnum)
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{
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struct gdbarch *gdbarch = get_frame_arch (frame);
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/* Expand tabs into spaces, since ncurses on MS-Windows doesn't. */
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tab_expansion_file stream;
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gdbarch_print_registers_info (gdbarch, &stream, frame, regnum, 1);
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/* Remove the possible \n. */
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std::string str = stream.release ();
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if (!str.empty () && str.back () == '\n')
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str.pop_back ();
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return str;
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}
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/* Compute the register value from the given frame and format it for
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the display. update 'content' and set 'highlight' if the contents
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changed. */
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void
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tui_register_info::update (const frame_info_ptr &frame)
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{
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std::string new_content = tui_register_format (frame, m_regno);
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highlight = content != new_content;
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content = std::move (new_content);
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}
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/* See tui-regs.h. */
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int
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tui_data_window::last_regs_line_no () const
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{
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int num_lines = m_regs_content.size () / m_regs_column_count;
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if (m_regs_content.size () % m_regs_column_count)
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num_lines++;
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return num_lines;
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}
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/* See tui-regs.h. */
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int
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tui_data_window::line_from_reg_element_no (int element_no) const
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{
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if (element_no < m_regs_content.size ())
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{
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int i, line = (-1);
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i = 1;
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while (line == (-1))
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{
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if (element_no < m_regs_column_count * i)
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line = i - 1;
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else
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i++;
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}
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return line;
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}
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else
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return (-1);
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}
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/* See tui-regs.h. */
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int
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tui_data_window::first_reg_element_no_inline (int line_no) const
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{
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if (line_no * m_regs_column_count <= m_regs_content.size ())
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return ((line_no + 1) * m_regs_column_count) - m_regs_column_count;
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else
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return (-1);
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}
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/* Show the registers of the given group in the data window
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and refresh the window. */
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void
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tui_data_window::set_register_group (const reggroup *group)
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{
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update_register_data (group);
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rerender ();
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}
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/* Set the data window to display the registers of the register group
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using the given frame. */
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void
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tui_data_window::update_register_data (const reggroup *group)
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{
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if (group == nullptr)
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group = general_reggroup;
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if (!target_has_registers ()
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|| !target_has_stack ()
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|| !target_has_memory ())
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{
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set_title (_("Registers"));
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m_current_group = nullptr;
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m_gdbarch = nullptr;
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m_regs_content.clear ();
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return;
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}
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frame_info_ptr frame = get_selected_frame (nullptr);
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struct gdbarch *gdbarch = get_frame_arch (frame);
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if (m_current_group == group && m_gdbarch == gdbarch)
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{
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/* Nothing to do here. */
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return;
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}
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m_current_group = group;
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m_gdbarch = gdbarch;
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/* Make a new title showing which group we display. */
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this->set_title (string_printf ("Register group: %s", group->name ()));
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/* Create the registers. */
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m_regs_content.clear ();
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for (int regnum = 0;
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regnum < gdbarch_num_cooked_regs (gdbarch);
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regnum++)
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{
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/* Must be in the group. */
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if (!gdbarch_register_reggroup_p (gdbarch, regnum, group))
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continue;
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/* If the register name is empty, it is undefined for this
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processor, so don't display anything. */
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const char *name = gdbarch_register_name (gdbarch, regnum);
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if (*name == '\0')
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continue;
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m_regs_content.emplace_back (regnum, frame);
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}
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}
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/* See tui-regs.h. */
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void
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tui_data_window::display_registers_from (int start_element_no)
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{
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werase (handle.get ());
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check_and_display_highlight_if_needed ();
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/* In case the regs window is not boxed, we'll write the last char in the
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last line here, causing a scroll, so prevent that. */
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scrollok (handle.get (), FALSE);
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int max_len = 0;
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for (auto &&data_item_win : m_regs_content)
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{
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int len = data_item_win.content.size ();
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if (len > max_len)
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max_len = len;
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}
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m_item_width = max_len + 1;
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int i;
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/* Mark register windows above the visible area. */
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for (i = 0; i < start_element_no; i++)
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m_regs_content[i].y = 0;
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m_regs_column_count = (width - box_size ()) / m_item_width;
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if (m_regs_column_count == 0)
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m_regs_column_count = 1;
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m_item_width = (width - box_size ()) / m_regs_column_count;
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/* Now create each data "sub" window, and write the display into
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it. */
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int cur_y = box_width ();
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while (i < m_regs_content.size () && cur_y <= height - box_size ())
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{
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for (int j = 0;
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j < m_regs_column_count && i < m_regs_content.size ();
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j++)
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{
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/* Create the window if necessary. */
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m_regs_content[i].x = box_width () + (m_item_width * j);
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m_regs_content[i].y = cur_y;
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m_regs_content[i].rerender (handle.get (), m_item_width);
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i++; /* Next register. */
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}
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cur_y++; /* Next row. */
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}
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/* Mark register windows below the visible area. */
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for (; i < m_regs_content.size (); i++)
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m_regs_content[i].y = 0;
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refresh_window ();
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}
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/* See tui-regs.h. */
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void
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tui_data_window::display_reg_element_at_line (int start_element_no,
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int start_line_no)
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{
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int element_no = start_element_no;
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if (start_element_no != 0 && start_line_no != 0)
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{
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int last_line_no, first_line_on_last_page;
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last_line_no = last_regs_line_no ();
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first_line_on_last_page = last_line_no - (height - box_size ());
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if (first_line_on_last_page < 0)
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first_line_on_last_page = 0;
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/* If the element_no causes us to scroll past the end of the
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registers, adjust what element to really start the
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display at. */
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if (start_line_no > first_line_on_last_page)
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element_no = first_reg_element_no_inline (first_line_on_last_page);
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}
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display_registers_from (element_no);
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}
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/* See tui-regs.h. */
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int
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tui_data_window::display_registers_from_line (int line_no)
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{
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int element_no;
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if (line_no < 0)
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line_no = 0;
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else
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{
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/* Make sure that we don't display off the end of the
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registers. */
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if (line_no >= last_regs_line_no ())
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{
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line_no = line_from_reg_element_no (m_regs_content.size () - 1);
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if (line_no < 0)
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line_no = 0;
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}
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}
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element_no = first_reg_element_no_inline (line_no);
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if (element_no < m_regs_content.size ())
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display_reg_element_at_line (element_no, line_no);
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else
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line_no = (-1);
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return line_no;
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}
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/* Answer the index first element displayed. If none are displayed,
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then return (-1). */
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int
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tui_data_window::first_data_item_displayed ()
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{
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for (int i = 0; i < m_regs_content.size (); i++)
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{
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if (m_regs_content[i].visible ())
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return i;
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}
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return -1;
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}
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void
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tui_data_window::erase_data_content ()
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{
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center_string (_("[ Register Values Unavailable ]"));
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}
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/* See tui-regs.h. */
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void
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tui_data_window::rerender ()
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{
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if (m_regs_content.empty ())
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erase_data_content ();
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else
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display_registers_from (0);
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tui_wrefresh (handle.get ());
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}
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/* Scroll the data window vertically forward or backward. */
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void
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tui_data_window::do_scroll_vertical (int num_to_scroll)
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{
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int first_element_no;
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int first_line = (-1);
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first_element_no = first_data_item_displayed ();
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if (first_element_no < m_regs_content.size ())
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first_line = line_from_reg_element_no (first_element_no);
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else
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{ /* Calculate the first line from the element number which is in
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the general data content. */
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}
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if (first_line >= 0)
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{
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first_line += num_to_scroll;
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display_registers_from_line (first_line);
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}
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}
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/* This function check all displayed registers for changes in values,
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given a particular frame. If the values have changed, they are
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updated with the new value and highlighted. */
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void
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tui_data_window::check_register_values (const frame_info_ptr &frame)
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{
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if (frame == nullptr)
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set_register_group (nullptr);
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else
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{
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/* If the frame architecture changed, we need to reset the
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register group. */
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struct gdbarch *gdbarch = get_frame_arch (frame);
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if (gdbarch != m_gdbarch)
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set_register_group (nullptr);
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else
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{
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for (tui_register_info &data_item_win : m_regs_content)
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{
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bool was_hilighted = data_item_win.highlight;
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data_item_win.update (frame);
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/* Register windows whose y == 0 are outside the visible area. */
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if ((data_item_win.highlight || was_hilighted)
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&& data_item_win.visible ())
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data_item_win.rerender (handle.get (), m_item_width);
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}
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}
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tui_wrefresh (handle.get ());
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}
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}
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/* Display a register in a window. If hilite is TRUE, then the value
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will be displayed in reverse video. */
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void
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tui_register_info::rerender (WINDOW *handle, int field_width)
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{
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if (highlight)
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/* We ignore the return value, casting it to void in order to avoid
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a compiler warning. The warning itself was introduced by a patch
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to ncurses 5.7 dated 2009-08-29, changing this macro to expand
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to code that causes the compiler to generate an unused-value
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warning. */
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(void) wstandout (handle);
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mvwaddnstr (handle, y, x, content.c_str (), field_width - 1);
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if (content.size () < field_width)
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waddstr (handle, n_spaces (field_width - content.size ()));
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if (highlight)
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/* We ignore the return value, casting it to void in order to avoid
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a compiler warning. The warning itself was introduced by a patch
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to ncurses 5.7 dated 2009-08-29, changing this macro to expand
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to code that causes the compiler to generate an unused-value
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warning. */
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(void) wstandend (handle);
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}
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/* Helper for "tui reg next", returns the next register group after
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CURRENT_GROUP in the register group list for GDBARCH, with wrap around
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behaviour.
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If CURRENT_GROUP is nullptr (e.g. if the tui register window has only
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just been displayed and has no current group selected) or the currently
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selected register group can't be found (e.g. if the architecture has
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changed since the register window was last updated), then the first
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register group will be returned. */
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static const reggroup *
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tui_reg_next (const reggroup *current_group, struct gdbarch *gdbarch)
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{
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const std::vector<const reggroup *> &groups = gdbarch_reggroups (gdbarch);
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auto it = std::find (groups.begin (), groups.end (), current_group);
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if (it != groups.end ())
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it++;
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if (it == groups.end ())
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return groups.front ();
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return *it;
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}
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/* Helper for "tui reg prev", returns the register group previous to
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CURRENT_GROUP in the register group list for GDBARCH, with wrap around
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behaviour.
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If CURRENT_GROUP is nullptr (e.g. if the tui register window has only
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just been displayed and has no current group selected) or the currently
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selected register group can't be found (e.g. if the architecture has
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changed since the register window was last updated), then the last
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register group will be returned. */
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static const reggroup *
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tui_reg_prev (const reggroup *current_group, struct gdbarch *gdbarch)
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{
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const std::vector<const reggroup *> &groups = gdbarch_reggroups (gdbarch);
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auto it = std::find (groups.rbegin (), groups.rend (), current_group);
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if (it != groups.rend ())
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it++;
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if (it == groups.rend ())
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return groups.back ();
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return *it;
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}
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/* Implement the 'tui reg' command. Changes the register group displayed
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in the tui register window. Displays the tui register window if it is
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not already on display. */
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static void
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tui_reg_command (const char *args, int from_tty)
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{
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struct gdbarch *gdbarch = get_current_arch ();
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if (args != NULL)
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{
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size_t len = strlen (args);
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/* Make sure the curses mode is enabled. */
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tui_enable ();
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tui_suppress_output suppress;
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/* Make sure the register window is visible. If not, select an
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appropriate layout. We need to do this before trying to run the
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'next' or 'prev' commands. */
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if (TUI_DATA_WIN == NULL || !TUI_DATA_WIN->is_visible ())
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tui_regs_layout ();
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const reggroup *match = nullptr;
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const reggroup *current_group = TUI_DATA_WIN->get_current_group ();
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if (strncmp (args, "next", len) == 0)
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match = tui_reg_next (current_group, gdbarch);
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else if (strncmp (args, "prev", len) == 0)
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match = tui_reg_prev (current_group, gdbarch);
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else
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{
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/* This loop matches on the initial part of a register group
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name. If this initial part in ARGS matches only one register
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group then the switch is made. */
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for (const struct reggroup *group : gdbarch_reggroups (gdbarch))
|
|
{
|
|
if (strncmp (group->name (), args, len) == 0)
|
|
{
|
|
if (match != NULL)
|
|
error (_("ambiguous register group name '%s'"), args);
|
|
match = group;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (match == NULL)
|
|
error (_("unknown register group '%s'"), args);
|
|
|
|
TUI_DATA_WIN->set_register_group (match);
|
|
}
|
|
else
|
|
{
|
|
gdb_printf (_("\"tui reg\" must be followed by the name of "
|
|
"either a register group,\nor one of 'next' "
|
|
"or 'prev'. Known register groups are:\n"));
|
|
|
|
bool first = true;
|
|
for (const struct reggroup *group : gdbarch_reggroups (gdbarch))
|
|
{
|
|
if (!first)
|
|
gdb_printf (", ");
|
|
first = false;
|
|
gdb_printf ("%s", group->name ());
|
|
}
|
|
|
|
gdb_printf ("\n");
|
|
}
|
|
}
|
|
|
|
/* Complete names of register groups, and add the special "prev" and "next"
|
|
names. */
|
|
|
|
static void
|
|
tui_reggroup_completer (struct cmd_list_element *ignore,
|
|
completion_tracker &tracker,
|
|
const char *text, const char *word)
|
|
{
|
|
static const char * const extra[] = { "next", "prev", NULL };
|
|
|
|
reggroup_completer (ignore, tracker, text, word);
|
|
|
|
complete_on_enum (tracker, extra, text, word);
|
|
}
|
|
|
|
void _initialize_tui_regs ();
|
|
void
|
|
_initialize_tui_regs ()
|
|
{
|
|
struct cmd_list_element **tuicmd, *cmd;
|
|
|
|
tuicmd = tui_get_cmd_list ();
|
|
|
|
cmd = add_cmd ("reg", class_tui, tui_reg_command, _("\
|
|
TUI command to control the register window.\n\
|
|
Usage: tui reg NAME\n\
|
|
NAME is the name of the register group to display"), tuicmd);
|
|
set_cmd_completer (cmd, tui_reggroup_completer);
|
|
}
|