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tui-source.c
Go to the documentation of this file.
1/* TUI display source window.
2
3 Copyright (C) 1998-2023 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 "tui/tui-location.h"
41#include "gdb_curses.h"
42
43/* Function to display source in the source window. */
44bool
46 const struct symtab_and_line &sal)
47{
48 struct symtab *s = sal.symtab;
49 int line_no = sal.line;
50
51 if (s == NULL)
52 return false;
53
54 /* Take hilite (window border) into account, when
55 calculating the number of lines. */
56 int nlines = height - 2;
57
58 std::string srclines;
59 const std::vector<off_t> *offsets;
60 if (!g_source_cache.get_source_lines (s, line_no, line_no + nlines,
61 &srclines)
62 || !g_source_cache.get_line_charpos (s, &offsets))
63 return false;
64
65 int cur_line_no, cur_line;
66 const char *s_filename = symtab_to_filename_for_display (s);
67
68 title = s_filename;
69
70 m_fullname = make_unique_xstrdup (symtab_to_fullname (s));
71
72 cur_line = 0;
73 m_gdbarch = s->compunit ()->objfile ()->arch ();
75 cur_line_no = m_start_line_or_addr.u.line_no = line_no;
76
77 m_digits = 7;
79 {
80 /* Solaris 11+gcc 5.5 has ambiguous overloads of log10, so we
81 cast to double to get the right one. */
82 double l = log10 ((double) offsets->size ());
83 m_digits = 1 + (int) l;
84 }
85
86 m_max_length = -1;
87 const char *iter = srclines.c_str ();
88 m_content.resize (nlines);
89 while (cur_line < nlines)
90 {
91 struct tui_source_element *element = &m_content[cur_line];
92
93 std::string text;
94 if (*iter != '\0')
95 {
96 int line_len;
97 text = tui_copy_source_line (&iter, &line_len);
98 m_max_length = std::max (m_max_length, line_len);
99 }
100
101 /* Set whether element is the execution point
102 and whether there is a break point on it. */
103 element->line_or_addr.loa = LOA_LINE;
104 element->line_or_addr.u.line_no = cur_line_no;
105 element->is_exec_point
106 = (filename_cmp (tui_location.full_name ().c_str (),
107 symtab_to_fullname (s)) == 0
108 && cur_line_no == tui_location.line_no ());
109
110 m_content[cur_line].line = std::move (text);
111
112 cur_line++;
113 cur_line_no++;
114 }
115
116 return true;
117}
118
119
120/* Answer whether the source is currently displayed in the source
121 window. */
122bool
123tui_source_window::showing_source_p (const char *fullname) const
124{
125 return (!m_content.empty ()
126 && (filename_cmp (tui_location.full_name ().c_str (),
127 fullname) == 0));
128}
129
130
131/* Scroll the source forward or backward vertically. */
132void
134{
135 if (!m_content.empty ())
136 {
137 struct symtab *s;
139 struct gdbarch *arch = m_gdbarch;
140
141 if (cursal.symtab == NULL)
142 {
145 arch = get_frame_arch (fi);
146 }
147 else
148 s = cursal.symtab;
149
150 int line_no = m_start_line_or_addr.u.line_no + num_to_scroll;
151 const std::vector<off_t> *offsets;
152 if (g_source_cache.get_line_charpos (s, &offsets)
153 && line_no > offsets->size ())
155 if (line_no <= 0)
156 line_no = 1;
157
158 cursal.line = line_no;
159 find_line_pc (cursal.symtab, cursal.line, &cursal.pc);
160 for (struct tui_source_window_base *win_info : tui_source_windows ())
161 win_info->update_source_window_as_is (arch, cursal);
162 }
163}
164
165bool
167{
168 return (m_content[line_no].line_or_addr.loa == LOA_LINE
169 && m_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
177bool
179{
180 if (m_content.size () < SCROLL_THRESHOLD)
181 return false;
182
183 for (size_t i = 0; i < m_content.size () - SCROLL_THRESHOLD; ++i)
184 {
185 if (m_content[i].line_or_addr.loa == LOA_LINE
186 && m_content[i].line_or_addr.u.line_no == line)
187 return true;
188 }
189
190 return false;
191}
192
193void
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;
207 }
208 else
209 {
210 struct tui_line_or_address l;
211
212 l.loa = LOA_LINE;
213 l.u.line_no = sal.line;
215 }
216}
217
218void
220 CORE_ADDR *addr_p)
221{
223
224 *gdbarch_p = m_gdbarch;
226}
227
228/* See tui-winsource.h. */
229
230void
232{
233 int lineno = m_content[0].line_or_addr.u.line_no + offset;
234 char text[20];
235 /* To completely overwrite the previous border when the source window height
236 is increased, both spaces after the line number have to be redrawn. */
237 xsnprintf (text, sizeof (text), "%*d ", m_digits - 1, lineno);
238 waddstr (handle.get (), text);
239}
bool get_source_lines(struct symtab *s, int first_line, int last_line, std::string *lines_out)
bool get_line_charpos(struct symtab *s, const std::vector< off_t > **offsets)
CORE_ADDR get_frame_pc(frame_info_ptr frame)
Definition frame.c:2592
struct gdbarch * get_frame_arch(frame_info_ptr this_frame)
Definition frame.c:2907
frame_info_ptr get_selected_frame(const char *message)
Definition frame.c:1813
source_cache g_source_cache
const char * symtab_to_fullname(struct symtab *s)
Definition source.c:1252
const char * symtab_to_filename_for_display(struct symtab *symtab)
Definition source.c:1287
struct symtab_and_line get_current_source_symtab_and_line(void)
Definition source.c:238
struct objfile * objfile() const
Definition symtab.h:1714
struct gdbarch * arch() const
Definition objfiles.h:482
struct symtab * symtab
Definition symtab.h:2263
CORE_ADDR pc
Definition symtab.h:2272
struct compunit_symtab * compunit() const
Definition symtab.h:1603
enum tui_line_or_address_kind loa
union tui_line_or_address::@187 u
const std::string & full_name() const
struct tui_line_or_address line_or_addr
struct tui_line_or_address m_start_line_or_addr
void update_source_window(struct gdbarch *gdbarch, const struct symtab_and_line &sal)
struct gdbarch * m_gdbarch
std::vector< tui_source_element > m_content
void set_is_exec_point_at(struct tui_line_or_address l)
bool set_contents(struct gdbarch *gdbarch, const struct symtab_and_line &sal) override
Definition tui-source.c:45
void display_start_addr(struct gdbarch **gdbarch_p, CORE_ADDR *addr_p) override
Definition tui-source.c:219
void show_line_number(int lineno) const override
Definition tui-source.c:231
void maybe_update(frame_info_ptr fi, symtab_and_line sal) override
Definition tui-source.c:194
bool showing_source_p(const char *filename) const
Definition tui-source.c:123
bool location_matches_p(struct bp_location *loc, int line_no) override
Definition tui-source.c:166
gdb::unique_xmalloc_ptr< char > m_fullname
Definition tui-source.h:84
bool line_is_displayed(int line) const
Definition tui-source.c:178
void do_scroll_vertical(int num_to_scroll) override
Definition tui-source.c:133
std::string title
Definition tui-data.h:160
std::unique_ptr< WINDOW, curses_deleter > handle
Definition tui-data.h:150
bool find_line_pc(struct symtab *symtab, int line, CORE_ADDR *pc)
Definition symtab.c:3473
struct symtab * find_pc_line_symtab(CORE_ADDR pc)
Definition symtab.c:3319
tui_location_tracker tui_location
bool compact_source
Definition tui-win.c:827
std::string tui_copy_source_line(const char **ptr, int *length)
@ LOA_LINE
#define SCROLL_THRESHOLD