1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
|
/* TUI display source window.
Copyright (C) 1998-2024 Free Software Foundation, Inc.
Contributed by Hewlett-Packard Company.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include <math.h>
#include <ctype.h>
#include "symtab.h"
#include "frame.h"
#include "breakpoint.h"
#include "source.h"
#include "objfiles.h"
#include "filenames.h"
#include "source-cache.h"
#include "tui/tui.h"
#include "tui/tui-data.h"
#include "tui/tui-io.h"
#include "tui/tui-status.h"
#include "tui/tui-win.h"
#include "tui/tui-winsource.h"
#include "tui/tui-source.h"
#include "tui/tui-location.h"
#include "gdb_curses.h"
/* Function to display source in the source window. */
bool
tui_source_window::set_contents (struct gdbarch *arch,
const struct symtab_and_line &sal)
{
struct symtab *s = sal.symtab;
int line_no = sal.line;
if (s == NULL)
return false;
/* Take hilite (window border) into account, when
calculating the number of lines. */
int nlines = height - box_size ();
std::string srclines;
const std::vector<off_t> *offsets;
if (!g_source_cache.get_source_lines (s, line_no, line_no + nlines,
&srclines)
|| !g_source_cache.get_line_charpos (s, &offsets))
return false;
int cur_line_no, cur_line;
const char *s_filename = symtab_to_filename_for_display (s);
set_title (s_filename);
m_fullname = make_unique_xstrdup (symtab_to_fullname (s));
cur_line = 0;
m_gdbarch = s->compunit ()->objfile ()->arch ();
m_start_line_or_addr.loa = LOA_LINE;
cur_line_no = m_start_line_or_addr.u.line_no = line_no;
m_digits = 7;
if (compact_source)
{
/* Solaris 11+gcc 5.5 has ambiguous overloads of log10, so we
cast to double to get the right one. */
int lines_in_file = offsets->size ();
int max_line_nr = lines_in_file;
int digits_needed = 1 + (int)log10 ((double) max_line_nr);
int trailing_space = 1;
m_digits = digits_needed + trailing_space;
}
m_max_length = -1;
const char *iter = srclines.c_str ();
m_content.resize (nlines);
while (cur_line < nlines)
{
struct tui_source_element *element = &m_content[cur_line];
std::string text;
if (*iter != '\0')
{
int line_len;
text = tui_copy_source_line (&iter, &line_len);
m_max_length = std::max (m_max_length, line_len);
}
else
{
/* Line not in source file. */
cur_line_no = -1;
}
/* Set whether element is the execution point
and whether there is a break point on it. */
element->line_or_addr.loa = LOA_LINE;
element->line_or_addr.u.line_no = cur_line_no;
element->is_exec_point
= (filename_cmp (tui_location.full_name ().c_str (),
symtab_to_fullname (s)) == 0
&& cur_line_no == tui_location.line_no ());
m_content[cur_line].line = std::move (text);
cur_line++;
cur_line_no++;
}
return true;
}
/* Answer whether the source is currently displayed in the source
window. */
bool
tui_source_window::showing_source_p (const char *fullname) const
{
return (!m_content.empty ()
&& (filename_cmp (tui_location.full_name ().c_str (),
fullname) == 0));
}
/* Scroll the source forward or backward vertically. */
void
tui_source_window::do_scroll_vertical (int num_to_scroll)
{
if (!m_content.empty ())
{
struct symtab *s;
struct symtab_and_line cursal = get_current_source_symtab_and_line ();
struct gdbarch *arch = m_gdbarch;
if (cursal.symtab == NULL)
{
frame_info_ptr fi = get_selected_frame (NULL);
s = find_pc_line_symtab (get_frame_pc (fi));
arch = get_frame_arch (fi);
}
else
s = cursal.symtab;
int line_no = m_start_line_or_addr.u.line_no + num_to_scroll;
const std::vector<off_t> *offsets;
if (g_source_cache.get_line_charpos (s, &offsets)
&& line_no > offsets->size ())
line_no = m_start_line_or_addr.u.line_no;
if (line_no <= 0)
line_no = 1;
cursal.line = line_no;
find_line_pc (cursal.symtab, cursal.line, &cursal.pc);
for (struct tui_source_window_base *win_info : tui_source_windows ())
win_info->update_source_window_as_is (arch, cursal);
}
}
bool
tui_source_window::location_matches_p (struct bp_location *loc, int line_no)
{
return (m_content[line_no].line_or_addr.loa == LOA_LINE
&& m_content[line_no].line_or_addr.u.line_no == loc->line_number
&& loc->symtab != NULL
&& filename_cmp (m_fullname.get (),
symtab_to_fullname (loc->symtab)) == 0);
}
/* See tui-source.h. */
bool
tui_source_window::line_is_displayed (int line) const
{
if (m_content.size () < SCROLL_THRESHOLD)
return false;
for (size_t i = 0; i < m_content.size () - SCROLL_THRESHOLD; ++i)
{
if (m_content[i].line_or_addr.loa == LOA_LINE
&& m_content[i].line_or_addr.u.line_no == line)
return true;
}
return false;
}
void
tui_source_window::maybe_update (const frame_info_ptr &fi, symtab_and_line sal)
{
int start_line = (sal.line - ((height - box_size ()) / 2)) + 1;
if (start_line <= 0)
start_line = 1;
bool source_already_displayed = (sal.symtab != 0
&& showing_source_p (m_fullname.get ()));
if (!(source_already_displayed && line_is_displayed (sal.line)))
{
sal.line = start_line;
update_source_window (get_frame_arch (fi), sal);
}
else
{
struct tui_line_or_address l;
l.loa = LOA_LINE;
l.u.line_no = sal.line;
set_is_exec_point_at (l);
}
}
void
tui_source_window::display_start_addr (struct gdbarch **gdbarch_p,
CORE_ADDR *addr_p)
{
struct symtab_and_line cursal = get_current_source_symtab_and_line ();
*gdbarch_p = m_gdbarch;
find_line_pc (cursal.symtab, m_start_line_or_addr.u.line_no, addr_p);
}
/* See tui-winsource.h. */
void
tui_source_window::show_line_number (int offset) const
{
int lineno = m_content[offset].line_or_addr.u.line_no;
char text[20];
char space = tui_left_margin_verbose ? '_' : ' ';
if (lineno == -1)
{
/* Line not in source file, don't show line number. */
for (int i = 0; i <= m_digits; ++i)
text[i] = (i == m_digits) ? '\0' : space;
}
else
{
xsnprintf (text, sizeof (text),
tui_left_margin_verbose ? "%0*d%c" : "%*d%c", m_digits - 1,
lineno, space);
}
display_string (text);
}
|
