| 1 | /* TUI display source window. |
| 2 | |
| 3 | Copyright (C) 1998-2020 Free Software Foundation, Inc. |
| 4 | |
| 5 | Contributed by Hewlett-Packard Company. |
| 6 | |
| 7 | This file is part of GDB. |
| 8 | |
| 9 | This program is free software; you can redistribute it and/or modify |
| 10 | it under the terms of the GNU General Public License as published by |
| 11 | the Free Software Foundation; either version 3 of the License, or |
| 12 | (at your option) any later version. |
| 13 | |
| 14 | This program is distributed in the hope that it will be useful, |
| 15 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 17 | GNU General Public License for more details. |
| 18 | |
| 19 | You should have received a copy of the GNU General Public License |
| 20 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| 21 | |
| 22 | #include "defs.h" |
| 23 | #include <math.h> |
| 24 | #include <ctype.h> |
| 25 | #include "symtab.h" |
| 26 | #include "frame.h" |
| 27 | #include "breakpoint.h" |
| 28 | #include "source.h" |
| 29 | #include "objfiles.h" |
| 30 | #include "filenames.h" |
| 31 | #include "source-cache.h" |
| 32 | |
| 33 | #include "tui/tui.h" |
| 34 | #include "tui/tui-data.h" |
| 35 | #include "tui/tui-io.h" |
| 36 | #include "tui/tui-stack.h" |
| 37 | #include "tui/tui-win.h" |
| 38 | #include "tui/tui-winsource.h" |
| 39 | #include "tui/tui-source.h" |
| 40 | #include "gdb_curses.h" |
| 41 | |
| 42 | /* Function to display source in the source window. */ |
| 43 | bool |
| 44 | tui_source_window::set_contents (struct gdbarch *arch, |
| 45 | const struct symtab_and_line &sal) |
| 46 | { |
| 47 | struct symtab *s = sal.symtab; |
| 48 | int line_no = sal.line; |
| 49 | |
| 50 | if (s == NULL) |
| 51 | return false; |
| 52 | |
| 53 | int line_width, nlines; |
| 54 | |
| 55 | line_width = width - TUI_EXECINFO_SIZE - 1; |
| 56 | /* Take hilite (window border) into account, when |
| 57 | calculating the number of lines. */ |
| 58 | nlines = (line_no + (height - 2)) - line_no; |
| 59 | |
| 60 | std::string srclines; |
| 61 | const std::vector<off_t> *offsets; |
| 62 | if (!g_source_cache.get_source_lines (s, line_no, line_no + nlines, |
| 63 | &srclines) |
| 64 | || !g_source_cache.get_line_charpos (s, &offsets)) |
| 65 | return false; |
| 66 | |
| 67 | int cur_line_no, cur_line; |
| 68 | struct tui_locator_window *locator |
| 69 | = tui_locator_win_info_ptr (); |
| 70 | const char *s_filename = symtab_to_filename_for_display (s); |
| 71 | |
| 72 | title = s_filename; |
| 73 | |
| 74 | m_fullname = make_unique_xstrdup (symtab_to_fullname (s)); |
| 75 | |
| 76 | cur_line = 0; |
| 77 | gdbarch = get_objfile_arch (SYMTAB_OBJFILE (s)); |
| 78 | start_line_or_addr.loa = LOA_LINE; |
| 79 | cur_line_no = start_line_or_addr.u.line_no = line_no; |
| 80 | |
| 81 | int digits = 0; |
| 82 | if (compact_source) |
| 83 | { |
| 84 | /* Solaris 11+gcc 5.5 has ambiguous overloads of log10, so we |
| 85 | cast to double to get the right one. */ |
| 86 | double l = log10 ((double) offsets->size ()); |
| 87 | digits = 1 + (int) l; |
| 88 | } |
| 89 | |
| 90 | const char *iter = srclines.c_str (); |
| 91 | content.resize (nlines); |
| 92 | while (cur_line < nlines) |
| 93 | { |
| 94 | struct tui_source_element *element |
| 95 | = &content[cur_line]; |
| 96 | |
| 97 | std::string text; |
| 98 | if (*iter != '\0') |
| 99 | text = tui_copy_source_line (&iter, cur_line_no, |
| 100 | horizontal_offset, |
| 101 | line_width, digits); |
| 102 | |
| 103 | /* Set whether element is the execution point |
| 104 | and whether there is a break point on it. */ |
| 105 | element->line_or_addr.loa = LOA_LINE; |
| 106 | element->line_or_addr.u.line_no = cur_line_no; |
| 107 | element->is_exec_point |
| 108 | = (filename_cmp (locator->full_name.c_str (), |
| 109 | symtab_to_fullname (s)) == 0 |
| 110 | && cur_line_no == locator->line_no); |
| 111 | |
| 112 | content[cur_line].line = std::move (text); |
| 113 | |
| 114 | cur_line++; |
| 115 | cur_line_no++; |
| 116 | } |
| 117 | |
| 118 | return true; |
| 119 | } |
| 120 | |
| 121 | |
| 122 | /* Answer whether the source is currently displayed in the source |
| 123 | window. */ |
| 124 | bool |
| 125 | tui_source_window::showing_source_p (const char *fullname) const |
| 126 | { |
| 127 | return (!content.empty () |
| 128 | && (filename_cmp (tui_locator_win_info_ptr ()->full_name.c_str (), |
| 129 | fullname) == 0)); |
| 130 | } |
| 131 | |
| 132 | |
| 133 | /* Scroll the source forward or backward vertically. */ |
| 134 | void |
| 135 | tui_source_window::do_scroll_vertical (int num_to_scroll) |
| 136 | { |
| 137 | if (!content.empty ()) |
| 138 | { |
| 139 | struct symtab *s; |
| 140 | struct symtab_and_line cursal = get_current_source_symtab_and_line (); |
| 141 | struct gdbarch *arch = gdbarch; |
| 142 | |
| 143 | if (cursal.symtab == NULL) |
| 144 | { |
| 145 | struct frame_info *fi = get_selected_frame (NULL); |
| 146 | s = find_pc_line_symtab (get_frame_pc (fi)); |
| 147 | arch = get_frame_arch (fi); |
| 148 | } |
| 149 | else |
| 150 | s = cursal.symtab; |
| 151 | |
| 152 | int line_no = start_line_or_addr.u.line_no + num_to_scroll; |
| 153 | const std::vector<off_t> *offsets; |
| 154 | if (g_source_cache.get_line_charpos (s, &offsets) |
| 155 | && line_no > offsets->size ()) |
| 156 | line_no = start_line_or_addr.u.line_no; |
| 157 | if (line_no <= 0) |
| 158 | line_no = 1; |
| 159 | |
| 160 | cursal.line = line_no; |
| 161 | update_source_window (arch, cursal); |
| 162 | } |
| 163 | } |
| 164 | |
| 165 | bool |
| 166 | tui_source_window::location_matches_p (struct bp_location *loc, int line_no) |
| 167 | { |
| 168 | return (content[line_no].line_or_addr.loa == LOA_LINE |
| 169 | && content[line_no].line_or_addr.u.line_no == loc->line_number |
| 170 | && loc->symtab != NULL |
| 171 | && filename_cmp (m_fullname.get (), |
| 172 | symtab_to_fullname (loc->symtab)) == 0); |
| 173 | } |
| 174 | |
| 175 | /* See tui-source.h. */ |
| 176 | |
| 177 | bool |
| 178 | tui_source_window::line_is_displayed (int line) const |
| 179 | { |
| 180 | if (content.size () < SCROLL_THRESHOLD) |
| 181 | return false; |
| 182 | |
| 183 | for (size_t i = 0; i < content.size () - SCROLL_THRESHOLD; ++i) |
| 184 | { |
| 185 | if (content[i].line_or_addr.loa == LOA_LINE |
| 186 | && content[i].line_or_addr.u.line_no == line) |
| 187 | return true; |
| 188 | } |
| 189 | |
| 190 | return false; |
| 191 | } |
| 192 | |
| 193 | void |
| 194 | tui_source_window::maybe_update (struct frame_info *fi, symtab_and_line sal) |
| 195 | { |
| 196 | int start_line = (sal.line - ((height - 2) / 2)) + 1; |
| 197 | if (start_line <= 0) |
| 198 | start_line = 1; |
| 199 | |
| 200 | bool source_already_displayed = (sal.symtab != 0 |
| 201 | && showing_source_p (m_fullname.get ())); |
| 202 | |
| 203 | if (!(source_already_displayed && line_is_displayed (sal.line))) |
| 204 | { |
| 205 | sal.line = start_line; |
| 206 | update_source_window (get_frame_arch (fi), sal); |
| 207 | } |
| 208 | else |
| 209 | { |
| 210 | struct tui_line_or_address l; |
| 211 | |
| 212 | l.loa = LOA_LINE; |
| 213 | l.u.line_no = sal.line; |
| 214 | set_is_exec_point_at (l); |
| 215 | } |
| 216 | } |