754 lines
22 KiB
C
754 lines
22 KiB
C
/* TUI display registers in window.
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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 "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-windata.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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/*****************************************
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** STATIC LOCAL FUNCTIONS FORWARD DECLS **
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******************************************/
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static void
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tui_display_register (struct tui_data_element *data,
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struct tui_gen_win_info *win_info);
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static enum tui_status tui_show_register_group (struct reggroup *group,
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struct frame_info *frame,
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int refresh_values_only);
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static enum tui_status tui_get_register (struct frame_info *frame,
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struct tui_data_element *data,
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int regnum, int *changedp);
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/*****************************************
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** PUBLIC FUNCTIONS **
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******************************************/
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/* Answer the number of the last line in the regs display. If there
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are no registers (-1) is returned. */
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int
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tui_last_regs_line_no (void)
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{
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int num_lines = (-1);
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if (TUI_DATA_WIN->detail.data_display_info.regs_content_count > 0)
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{
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num_lines = (TUI_DATA_WIN->detail.data_display_info.regs_content_count /
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TUI_DATA_WIN->detail.data_display_info.regs_column_count);
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if (TUI_DATA_WIN->detail.data_display_info.regs_content_count %
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TUI_DATA_WIN->detail.data_display_info.regs_column_count)
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num_lines++;
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}
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return num_lines;
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}
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/* Answer the line number that the register element at element_no is
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on. If element_no is greater than the number of register elements
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there are, -1 is returned. */
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int
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tui_line_from_reg_element_no (int element_no)
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{
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if (element_no < TUI_DATA_WIN->detail.data_display_info.regs_content_count)
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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 <
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(TUI_DATA_WIN->detail.data_display_info.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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/* Answer the index of the first element in line_no. If line_no is
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past the register area (-1) is returned. */
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int
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tui_first_reg_element_no_inline (int line_no)
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{
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if ((line_no * TUI_DATA_WIN->detail.data_display_info.regs_column_count)
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<= TUI_DATA_WIN->detail.data_display_info.regs_content_count)
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return ((line_no + 1) *
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TUI_DATA_WIN->detail.data_display_info.regs_column_count) -
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TUI_DATA_WIN->detail.data_display_info.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_show_registers (struct reggroup *group)
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{
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enum tui_status ret = TUI_FAILURE;
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struct tui_data_info *display_info;
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/* Make sure the curses mode is enabled. */
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tui_enable ();
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/* Make sure the register window is visible. If not, select an
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appropriate layout. */
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if (TUI_DATA_WIN == NULL || !TUI_DATA_WIN->generic.is_visible)
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tui_set_layout_by_name (DATA_NAME);
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display_info = &TUI_DATA_WIN->detail.data_display_info;
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if (group == 0)
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group = general_reggroup;
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/* Say that registers should be displayed, even if there is a
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problem. */
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display_info->display_regs = TRUE;
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if (target_has_registers && target_has_stack && target_has_memory)
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{
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ret = tui_show_register_group (group, get_selected_frame (NULL),
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group == display_info->current_group);
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}
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if (ret == TUI_FAILURE)
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{
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display_info->current_group = 0;
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tui_erase_data_content (NO_REGS_STRING);
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}
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else
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{
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int i;
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/* Clear all notation of changed values. */
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for (i = 0; i < display_info->regs_content_count; i++)
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{
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struct tui_gen_win_info *data_item_win;
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struct tui_win_element *win;
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data_item_win = &display_info->regs_content[i]
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->which_element.data_window;
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win = data_item_win->content[0];
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win->which_element.data.highlight = FALSE;
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}
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display_info->current_group = group;
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tui_display_all_data ();
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}
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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. Values are refreshed only when
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refresh_values_only is TRUE. */
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static enum tui_status
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tui_show_register_group (struct reggroup *group,
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struct frame_info *frame,
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int refresh_values_only)
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{
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struct gdbarch *gdbarch = get_frame_arch (frame);
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enum tui_status ret = TUI_FAILURE;
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int nr_regs;
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int allocated_here = FALSE;
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int regnum, pos;
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char title[80];
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struct tui_data_info *display_info = &TUI_DATA_WIN->detail.data_display_info;
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/* Make a new title showing which group we display. */
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snprintf (title, sizeof (title) - 1, "Register group: %s",
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reggroup_name (group));
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xfree (TUI_DATA_WIN->generic.title);
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TUI_DATA_WIN->generic.title = xstrdup (title);
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/* See how many registers must be displayed. */
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nr_regs = 0;
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for (regnum = 0; regnum < gdbarch_num_cooked_regs (gdbarch); regnum++)
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{
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const char *name;
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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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name = gdbarch_register_name (gdbarch, regnum);
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if (name == 0 || *name == '\0')
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continue;
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nr_regs++;
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}
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if (display_info->regs_content_count > 0 && !refresh_values_only)
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{
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tui_free_data_content (display_info->regs_content,
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display_info->regs_content_count);
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display_info->regs_content_count = 0;
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}
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if (display_info->regs_content_count <= 0)
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{
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display_info->regs_content = tui_alloc_content (nr_regs, DATA_WIN);
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allocated_here = TRUE;
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refresh_values_only = FALSE;
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}
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if (display_info->regs_content != (tui_win_content) NULL)
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{
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if (!refresh_values_only || allocated_here)
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{
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TUI_DATA_WIN->generic.content = NULL;
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TUI_DATA_WIN->generic.content_size = 0;
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tui_add_content_elements (&TUI_DATA_WIN->generic, nr_regs);
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display_info->regs_content = TUI_DATA_WIN->generic.content;
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display_info->regs_content_count = nr_regs;
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}
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/* Now set the register names and values. */
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pos = 0;
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for (regnum = 0; regnum < gdbarch_num_cooked_regs (gdbarch); regnum++)
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{
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struct tui_gen_win_info *data_item_win;
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struct tui_data_element *data;
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const char *name;
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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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name = gdbarch_register_name (gdbarch, regnum);
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if (name == 0 || *name == '\0')
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continue;
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data_item_win =
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&display_info->regs_content[pos]->which_element.data_window;
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data = &data_item_win->content[0]->which_element.data;
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if (data)
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{
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if (!refresh_values_only)
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{
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data->item_no = regnum;
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data->name = name;
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data->highlight = FALSE;
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}
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tui_get_register (frame, data, regnum, 0);
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}
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pos++;
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}
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TUI_DATA_WIN->generic.content_size =
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display_info->regs_content_count + display_info->data_content_count;
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ret = TUI_SUCCESS;
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}
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return ret;
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}
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/* Function to display the registers in the content from
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'start_element_no' until the end of the register content or the end
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of the display height. No checking for displaying past the end of
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the registers is done here. */
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void
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tui_display_registers_from (int start_element_no)
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{
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struct tui_data_info *display_info = &TUI_DATA_WIN->detail.data_display_info;
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if (display_info->regs_content != (tui_win_content) NULL
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&& display_info->regs_content_count > 0)
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{
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int i = start_element_no;
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int j, item_win_width, cur_y;
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int max_len = 0;
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for (i = 0; i < display_info->regs_content_count; i++)
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{
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struct tui_data_element *data;
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struct tui_gen_win_info *data_item_win;
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char *p;
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int len;
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data_item_win
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= &display_info->regs_content[i]->which_element.data_window;
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data = &data_item_win->content[0]->which_element.data;
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len = 0;
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p = data->content;
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if (p != 0)
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while (*p)
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{
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if (*p++ == '\t')
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len = 8 * ((len / 8) + 1);
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else
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len++;
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}
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if (len > max_len)
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max_len = len;
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}
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item_win_width = max_len + 1;
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i = start_element_no;
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display_info->regs_column_count =
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(TUI_DATA_WIN->generic.width - 2) / item_win_width;
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if (display_info->regs_column_count == 0)
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display_info->regs_column_count = 1;
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item_win_width =
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(TUI_DATA_WIN->generic.width - 2) / display_info->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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cur_y = 1;
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while (i < display_info->regs_content_count
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&& cur_y <= TUI_DATA_WIN->generic.viewport_height)
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{
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for (j = 0;
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j < display_info->regs_column_count
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&& i < display_info->regs_content_count;
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j++)
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{
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struct tui_gen_win_info *data_item_win;
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struct tui_data_element *data_element_ptr;
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/* Create the window if necessary. */
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data_item_win = &display_info->regs_content[i]
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->which_element.data_window;
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data_element_ptr = &data_item_win->content[0]->which_element.data;
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if (data_item_win->handle != (WINDOW*) NULL
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&& (data_item_win->height != 1
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|| data_item_win->width != item_win_width
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|| data_item_win->origin.x != (item_win_width * j) + 1
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|| data_item_win->origin.y != cur_y))
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{
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tui_delete_win (data_item_win->handle);
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data_item_win->handle = 0;
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}
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if (data_item_win->handle == (WINDOW *) NULL)
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{
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data_item_win->height = 1;
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data_item_win->width = item_win_width;
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data_item_win->origin.x = (item_win_width * j) + 1;
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data_item_win->origin.y = cur_y;
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tui_make_window (data_item_win, DONT_BOX_WINDOW);
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scrollok (data_item_win->handle, FALSE);
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}
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touchwin (data_item_win->handle);
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/* Get the printable representation of the register
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and display it. */
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tui_display_register (data_element_ptr, data_item_win);
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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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}
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}
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/* Function to display the registers in the content from
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'start_element_no' on 'start_line_no' until the end of the register
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content or the end of the display height. This function checks
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that we won't display off the end of the register display. */
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static void
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tui_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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if (TUI_DATA_WIN->detail.data_display_info.regs_content
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!= (tui_win_content) NULL
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&& TUI_DATA_WIN->detail.data_display_info.regs_content_count > 0)
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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 = tui_last_regs_line_no ();
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first_line_on_last_page
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= last_line_no - (TUI_DATA_WIN->generic.height - 2);
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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 there is no other data displayed except registers, and
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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 (TUI_DATA_WIN->detail.data_display_info.data_content_count <= 0
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&& start_line_no > first_line_on_last_page)
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element_no
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= tui_first_reg_element_no_inline (first_line_on_last_page);
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}
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tui_display_registers_from (element_no);
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}
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}
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/* Function to display the registers starting at line line_no in the
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data window. Answers the line number that the display actually
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started from. If nothing is displayed (-1) is returned. */
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int
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tui_display_registers_from_line (int line_no,
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int force_display)
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{
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if (TUI_DATA_WIN->detail.data_display_info.regs_content_count > 0)
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{
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int line, element_no;
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if (line_no < 0)
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line = 0;
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else if (force_display)
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{ /* If we must display regs (force_display is true), then
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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 >= tui_last_regs_line_no ())
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{
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if ((line = tui_line_from_reg_element_no (
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TUI_DATA_WIN->detail.data_display_info.regs_content_count - 1)) < 0)
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line = 0;
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}
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else
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line = line_no;
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}
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else
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line = line_no;
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element_no = tui_first_reg_element_no_inline (line);
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if (element_no
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< TUI_DATA_WIN->detail.data_display_info.regs_content_count)
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tui_display_reg_element_at_line (element_no, line);
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else
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line = (-1);
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return line;
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}
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return (-1); /* Nothing was displayed. */
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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_check_register_values (struct frame_info *frame)
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{
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if (TUI_DATA_WIN != NULL
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&& TUI_DATA_WIN->generic.is_visible)
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{
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struct tui_data_info *display_info
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= &TUI_DATA_WIN->detail.data_display_info;
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if (display_info->regs_content_count <= 0
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&& display_info->display_regs)
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tui_show_registers (display_info->current_group);
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else
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{
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int i;
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for (i = 0; (i < display_info->regs_content_count); i++)
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{
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struct tui_data_element *data;
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struct tui_gen_win_info *data_item_win_ptr;
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int was_hilighted;
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data_item_win_ptr = &display_info->regs_content[i]->
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which_element.data_window;
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data = &data_item_win_ptr->content[0]->which_element.data;
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was_hilighted = data->highlight;
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tui_get_register (frame, data,
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data->item_no, &data->highlight);
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if (data->highlight || was_hilighted)
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{
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tui_display_register (data, data_item_win_ptr);
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}
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}
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Display a register in a window. If hilite is TRUE, then the value
|
|
will be displayed in reverse video. */
|
|
static void
|
|
tui_display_register (struct tui_data_element *data,
|
|
struct tui_gen_win_info *win_info)
|
|
{
|
|
if (win_info->handle != (WINDOW *) NULL)
|
|
{
|
|
int i;
|
|
|
|
if (data->highlight)
|
|
/* We ignore the return value, casting it 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 this macro to expand
|
|
to code that causes the compiler to generate an unused-value
|
|
warning. */
|
|
(void) wstandout (win_info->handle);
|
|
|
|
wmove (win_info->handle, 0, 0);
|
|
for (i = 1; i < win_info->width; i++)
|
|
waddch (win_info->handle, ' ');
|
|
wmove (win_info->handle, 0, 0);
|
|
if (data->content)
|
|
waddstr (win_info->handle, data->content);
|
|
|
|
if (data->highlight)
|
|
/* We ignore the return value, casting it 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 this macro to expand
|
|
to code that causes the compiler to generate an unused-value
|
|
warning. */
|
|
(void) wstandend (win_info->handle);
|
|
tui_refresh_win (win_info);
|
|
}
|
|
}
|
|
|
|
/* Helper for "tui reg next", wraps a call to REGGROUP_NEXT, but adds wrap
|
|
around behaviour. Returns the next register group, or NULL if the
|
|
register window is not currently being displayed. */
|
|
|
|
static struct reggroup *
|
|
tui_reg_next (struct gdbarch *gdbarch)
|
|
{
|
|
struct reggroup *group = NULL;
|
|
|
|
if (TUI_DATA_WIN != NULL)
|
|
{
|
|
group = TUI_DATA_WIN->detail.data_display_info.current_group;
|
|
group = reggroup_next (gdbarch, group);
|
|
if (group == NULL)
|
|
group = reggroup_next (gdbarch, NULL);
|
|
}
|
|
return group;
|
|
}
|
|
|
|
/* Helper for "tui reg prev", wraps a call to REGGROUP_PREV, but adds wrap
|
|
around behaviour. Returns the previous register group, or NULL if the
|
|
register window is not currently being displayed. */
|
|
|
|
static struct reggroup *
|
|
tui_reg_prev (struct gdbarch *gdbarch)
|
|
{
|
|
struct reggroup *group = NULL;
|
|
|
|
if (TUI_DATA_WIN != NULL)
|
|
{
|
|
group = TUI_DATA_WIN->detail.data_display_info.current_group;
|
|
group = reggroup_prev (gdbarch, group);
|
|
if (group == NULL)
|
|
group = reggroup_prev (gdbarch, NULL);
|
|
}
|
|
return group;
|
|
}
|
|
|
|
/* Implement the 'tui reg' command. Changes the register group displayed
|
|
in the tui register window. Displays the tui register window if it is
|
|
not already on display. */
|
|
|
|
static void
|
|
tui_reg_command (const char *args, int from_tty)
|
|
{
|
|
struct gdbarch *gdbarch = get_current_arch ();
|
|
|
|
if (args != NULL)
|
|
{
|
|
struct reggroup *group, *match = NULL;
|
|
size_t len = strlen (args);
|
|
|
|
/* Make sure the curses mode is enabled. */
|
|
tui_enable ();
|
|
|
|
/* Make sure the register window is visible. If not, select an
|
|
appropriate layout. We need to do this before trying to run the
|
|
'next' or 'prev' commands. */
|
|
if (TUI_DATA_WIN == NULL || !TUI_DATA_WIN->generic.is_visible)
|
|
tui_set_layout_by_name (DATA_NAME);
|
|
|
|
if (strncmp (args, "next", len) == 0)
|
|
match = tui_reg_next (gdbarch);
|
|
else if (strncmp (args, "prev", len) == 0)
|
|
match = tui_reg_prev (gdbarch);
|
|
|
|
/* This loop matches on the initial part of a register group
|
|
name. If this initial part in ARGS matches only one register
|
|
group then the switch is made. */
|
|
for (group = reggroup_next (gdbarch, NULL);
|
|
group != NULL;
|
|
group = reggroup_next (gdbarch, group))
|
|
{
|
|
if (strncmp (reggroup_name (group), 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_show_registers (match);
|
|
}
|
|
else
|
|
{
|
|
struct reggroup *group;
|
|
int first;
|
|
|
|
printf_unfiltered (_("\"tui reg\" must be followed by the name of "
|
|
"either a register group,\nor one of 'next' "
|
|
"or 'prev'. Known register groups are:\n"));
|
|
|
|
for (first = 1, group = reggroup_next (gdbarch, NULL);
|
|
group != NULL;
|
|
first = 0, group = reggroup_next (gdbarch, group))
|
|
{
|
|
if (!first)
|
|
printf_unfiltered (", ");
|
|
printf_unfiltered ("%s", reggroup_name (group));
|
|
}
|
|
|
|
printf_unfiltered ("\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 *extra[] = { "next", "prev", NULL };
|
|
size_t len = strlen (word);
|
|
const char **tmp;
|
|
|
|
reggroup_completer (ignore, tracker, text, word);
|
|
|
|
/* XXXX use complete_on_enum instead? */
|
|
for (tmp = extra; *tmp != NULL; ++tmp)
|
|
{
|
|
if (strncmp (word, *tmp, len) == 0)
|
|
tracker.add_completion (make_unique_xstrdup (*tmp));
|
|
}
|
|
}
|
|
|
|
void
|
|
_initialize_tui_regs (void)
|
|
{
|
|
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."), tuicmd);
|
|
set_cmd_completer (cmd, tui_reggroup_completer);
|
|
}
|
|
|
|
|
|
/*****************************************
|
|
** STATIC LOCAL FUNCTIONS **
|
|
******************************************/
|
|
|
|
/* Get the register from the frame and return a printable
|
|
representation of it. */
|
|
|
|
static char *
|
|
tui_register_format (struct frame_info *frame, int regnum)
|
|
{
|
|
struct gdbarch *gdbarch = get_frame_arch (frame);
|
|
|
|
string_file stream;
|
|
|
|
scoped_restore save_pagination
|
|
= make_scoped_restore (&pagination_enabled, 0);
|
|
scoped_restore save_stdout
|
|
= make_scoped_restore (&gdb_stdout, &stream);
|
|
|
|
gdbarch_print_registers_info (gdbarch, &stream, frame, regnum, 1);
|
|
|
|
/* Remove the possible \n. */
|
|
std::string &str = stream.string ();
|
|
if (!str.empty () && str.back () == '\n')
|
|
str.resize (str.size () - 1);
|
|
|
|
/* Expand tabs into spaces, since ncurses on MS-Windows doesn't. */
|
|
return tui_expand_tabs (str.c_str (), 0);
|
|
}
|
|
|
|
/* Get the register value from the given frame and format it for the
|
|
display. When changep is set, check if the new register value has
|
|
changed with respect to the previous call. */
|
|
static enum tui_status
|
|
tui_get_register (struct frame_info *frame,
|
|
struct tui_data_element *data,
|
|
int regnum, int *changedp)
|
|
{
|
|
enum tui_status ret = TUI_FAILURE;
|
|
|
|
if (changedp)
|
|
*changedp = FALSE;
|
|
if (target_has_registers)
|
|
{
|
|
char *prev_content = data->content;
|
|
|
|
data->content = tui_register_format (frame, regnum);
|
|
|
|
if (changedp != NULL
|
|
&& strcmp (prev_content, data->content) != 0)
|
|
*changedp = 1;
|
|
|
|
xfree (prev_content);
|
|
|
|
ret = TUI_SUCCESS;
|
|
}
|
|
return ret;
|
|
}
|