239 lines
6.4 KiB
C
239 lines
6.4 KiB
C
/* TUI display source window.
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Copyright (C) 1998-2022 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 <math.h>
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#include <ctype.h>
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#include "symtab.h"
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#include "frame.h"
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#include "breakpoint.h"
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#include "source.h"
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#include "objfiles.h"
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#include "filenames.h"
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#include "source-cache.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-io.h"
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#include "tui/tui-stack.h"
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#include "tui/tui-win.h"
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#include "tui/tui-winsource.h"
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#include "tui/tui-source.h"
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#include "tui/tui-location.h"
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#include "gdb_curses.h"
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/* Function to display source in the source window. */
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bool
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tui_source_window::set_contents (struct gdbarch *arch,
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const struct symtab_and_line &sal)
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{
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struct symtab *s = sal.symtab;
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int line_no = sal.line;
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if (s == NULL)
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return false;
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/* Take hilite (window border) into account, when
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calculating the number of lines. */
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int nlines = height - 2;
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std::string srclines;
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const std::vector<off_t> *offsets;
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if (!g_source_cache.get_source_lines (s, line_no, line_no + nlines,
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&srclines)
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|| !g_source_cache.get_line_charpos (s, &offsets))
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return false;
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int cur_line_no, cur_line;
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const char *s_filename = symtab_to_filename_for_display (s);
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title = s_filename;
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m_fullname = make_unique_xstrdup (symtab_to_fullname (s));
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cur_line = 0;
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m_gdbarch = s->compunit ()->objfile ()->arch ();
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m_start_line_or_addr.loa = LOA_LINE;
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cur_line_no = m_start_line_or_addr.u.line_no = line_no;
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m_digits = 7;
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if (compact_source)
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{
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/* Solaris 11+gcc 5.5 has ambiguous overloads of log10, so we
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cast to double to get the right one. */
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double l = log10 ((double) offsets->size ());
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m_digits = 1 + (int) l;
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}
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m_max_length = -1;
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const char *iter = srclines.c_str ();
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m_content.resize (nlines);
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while (cur_line < nlines)
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{
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struct tui_source_element *element = &m_content[cur_line];
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std::string text;
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if (*iter != '\0')
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{
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int line_len;
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text = tui_copy_source_line (&iter, &line_len);
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m_max_length = std::max (m_max_length, line_len);
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}
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/* Set whether element is the execution point
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and whether there is a break point on it. */
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element->line_or_addr.loa = LOA_LINE;
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element->line_or_addr.u.line_no = cur_line_no;
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element->is_exec_point
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= (filename_cmp (tui_location.full_name ().c_str (),
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symtab_to_fullname (s)) == 0
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&& cur_line_no == tui_location.line_no ());
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m_content[cur_line].line = std::move (text);
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cur_line++;
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cur_line_no++;
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}
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return true;
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}
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/* Answer whether the source is currently displayed in the source
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window. */
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bool
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tui_source_window::showing_source_p (const char *fullname) const
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{
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return (!m_content.empty ()
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&& (filename_cmp (tui_location.full_name ().c_str (),
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fullname) == 0));
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}
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/* Scroll the source forward or backward vertically. */
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void
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tui_source_window::do_scroll_vertical (int num_to_scroll)
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{
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if (!m_content.empty ())
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{
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struct symtab *s;
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struct symtab_and_line cursal = get_current_source_symtab_and_line ();
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struct gdbarch *arch = m_gdbarch;
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if (cursal.symtab == NULL)
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{
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struct frame_info *fi = get_selected_frame (NULL);
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s = find_pc_line_symtab (get_frame_pc (fi));
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arch = get_frame_arch (fi);
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}
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else
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s = cursal.symtab;
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int line_no = m_start_line_or_addr.u.line_no + num_to_scroll;
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const std::vector<off_t> *offsets;
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if (g_source_cache.get_line_charpos (s, &offsets)
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&& line_no > offsets->size ())
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line_no = m_start_line_or_addr.u.line_no;
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if (line_no <= 0)
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line_no = 1;
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cursal.line = line_no;
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find_line_pc (cursal.symtab, cursal.line, &cursal.pc);
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for (struct tui_source_window_base *win_info : tui_source_windows ())
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win_info->update_source_window_as_is (arch, cursal);
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}
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}
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bool
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tui_source_window::location_matches_p (struct bp_location *loc, int line_no)
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{
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return (m_content[line_no].line_or_addr.loa == LOA_LINE
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&& m_content[line_no].line_or_addr.u.line_no == loc->line_number
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&& loc->symtab != NULL
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&& filename_cmp (m_fullname.get (),
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symtab_to_fullname (loc->symtab)) == 0);
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}
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/* See tui-source.h. */
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bool
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tui_source_window::line_is_displayed (int line) const
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{
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if (m_content.size () < SCROLL_THRESHOLD)
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return false;
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for (size_t i = 0; i < m_content.size () - SCROLL_THRESHOLD; ++i)
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{
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if (m_content[i].line_or_addr.loa == LOA_LINE
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&& m_content[i].line_or_addr.u.line_no == line)
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return true;
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}
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return false;
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}
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void
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tui_source_window::maybe_update (struct frame_info *fi, symtab_and_line sal)
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{
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int start_line = (sal.line - ((height - 2) / 2)) + 1;
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if (start_line <= 0)
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start_line = 1;
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bool source_already_displayed = (sal.symtab != 0
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&& showing_source_p (m_fullname.get ()));
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if (!(source_already_displayed && line_is_displayed (sal.line)))
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{
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sal.line = start_line;
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update_source_window (get_frame_arch (fi), sal);
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}
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else
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{
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struct tui_line_or_address l;
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l.loa = LOA_LINE;
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l.u.line_no = sal.line;
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set_is_exec_point_at (l);
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}
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}
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void
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tui_source_window::display_start_addr (struct gdbarch **gdbarch_p,
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CORE_ADDR *addr_p)
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{
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struct symtab_and_line cursal = get_current_source_symtab_and_line ();
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*gdbarch_p = m_gdbarch;
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find_line_pc (cursal.symtab, m_start_line_or_addr.u.line_no, addr_p);
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}
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/* See tui-winsource.h. */
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void
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tui_source_window::show_line_number (int offset) const
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{
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int lineno = m_content[0].line_or_addr.u.line_no + offset;
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char text[20];
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/* To completely overwrite the previous border when the source window height
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is increased, both spaces after the line number have to be redrawn. */
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xsnprintf (text, sizeof (text), "%*d ", m_digits - 1, lineno);
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waddstr (handle.get (), text);
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}
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