1 /* List lines of source files for GDB, the GNU debugger.
2 Copyright (C) 1999-2019 Free Software Foundation, Inc.
4 This file is part of GDB.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program. If not, see <http://www.gnu.org/licenses/>. */
22 #include "common/scoped_fd.h"
26 /* See openp function definition for their description. */
30 OPF_TRY_CWD_FIRST = 0x01,
31 OPF_SEARCH_IN_PATH = 0x02,
32 OPF_RETURN_REALPATH = 0x04,
35 DEF_ENUM_FLAGS_TYPE(openp_flag, openp_flags);
37 extern int openp (const char *, openp_flags, const char *, int,
38 gdb::unique_xmalloc_ptr<char> *);
40 extern int source_full_path_of (const char *, gdb::unique_xmalloc_ptr<char> *);
42 extern void mod_path (const char *, char **);
44 extern void add_path (const char *, char **, int);
46 extern void directory_switch (const char *, int);
48 extern char *source_path;
50 extern void init_source_path (void);
52 /* This function is capable of finding the absolute path to a
53 source file, and opening it, provided you give it a FILENAME. Both the
54 DIRNAME and FULLNAME are only added suggestions on where to find the file.
56 FILENAME should be the filename to open.
57 DIRNAME is the compilation directory of a particular source file.
58 Only some debug formats provide this info.
59 FULLNAME can be the last known absolute path to the file in question.
60 Space for the path must have been malloc'd. If a path substitution
61 is applied we free the old value and set a new one.
64 A valid file descriptor is returned (the return value is positive).
65 FULLNAME is set to the absolute path to the file just opened.
66 The caller is responsible for freeing FULLNAME.
69 An invalid file descriptor is returned (the return value is negative).
70 FULLNAME is set to NULL. */
71 extern scoped_fd find_and_open_source (const char *filename,
73 gdb::unique_xmalloc_ptr<char> *fullname);
75 /* Open a source file given a symtab S. Returns a file descriptor or
76 negative number for error. */
77 extern scoped_fd open_source_file (struct symtab *s);
79 extern gdb::unique_xmalloc_ptr<char> rewrite_source_path (const char *path);
81 extern const char *symtab_to_fullname (struct symtab *s);
83 /* Returns filename without the compile directory part, basename or absolute
84 filename. It depends on 'set filename-display' value. */
85 extern const char *symtab_to_filename_for_display (struct symtab *symtab);
87 /* Create and initialize the table S->line_charpos that records the
88 positions of the lines in the source file, which is assumed to be
89 open on descriptor DESC. All set S->nlines to the number of such
91 extern void find_source_lines (struct symtab *s, int desc);
93 /* Return the first line listed by print_source_lines. Used by
94 command interpreters to request listing from a previous point. If
95 0, then no source lines have yet been listed since the last time
96 the current source line was changed. */
97 extern int get_first_line_listed (void);
99 /* Return the default number of lines to print with commands like the
100 cli "list". The caller of print_source_lines must use this to
101 calculate the end line and use it in the call to print_source_lines
102 as it does not automatically use this value. */
103 extern int get_lines_to_list (void);
105 /* Return the current source file for listing and next line to list.
106 NOTE: The returned sal pc and end fields are not valid. */
107 extern struct symtab_and_line get_current_source_symtab_and_line (void);
109 /* If the current source file for listing is not set, try and get a default.
110 Usually called before get_current_source_symtab_and_line() is called.
111 It may err out if a default cannot be determined.
112 We must be cautious about where it is called, as it can recurse as the
113 process of determining a new default may call the caller!
114 Use get_current_source_symtab_and_line only to get whatever
115 we have without erroring out or trying to get a default. */
116 extern void set_default_source_symtab_and_line (void);
118 /* Return the current default file for listing and next line to list
119 (the returned sal pc and end fields are not valid.)
120 and set the current default to whatever is in SAL.
121 NOTE: The returned sal pc and end fields are not valid. */
122 extern symtab_and_line set_current_source_symtab_and_line
123 (const symtab_and_line &sal);
125 /* Reset any information stored about a default file and line to print. */
126 extern void clear_current_source_symtab_and_line (void);
128 /* Add a source path substitution rule. */
129 extern void add_substitute_path_rule (char *, char *);
131 /* Print text describing the full name of the source file S
132 and the line number LINE and its corresponding character position.
133 The text starts with two Ctrl-z so that the Emacs-GDB interface
136 MID_STATEMENT is nonzero if the PC is not at the beginning of that line.
138 Return 1 if successful, 0 if could not find the file. */
139 extern int identify_source_line (struct symtab *s, int line,
140 int mid_statement, CORE_ADDR pc);
142 /* Flags passed as 4th argument to print_source_lines. */
143 enum print_source_lines_flag
145 /* Do not print an error message. */
146 PRINT_SOURCE_LINES_NOERROR = (1 << 0),
148 /* Print the filename in front of the source lines. */
149 PRINT_SOURCE_LINES_FILENAME = (1 << 1)
151 DEF_ENUM_FLAGS_TYPE (enum print_source_lines_flag, print_source_lines_flags);
153 /* Show source lines from the file of symtab S, starting with line
154 number LINE and stopping before line number STOPLINE. If this is
155 not the command line version, then the source is shown in the source
156 window otherwise it is simply printed. */
157 extern void print_source_lines (struct symtab *s, int line, int stopline,
158 print_source_lines_flags flags);
160 /* Wrap up the logic to build a line number range for passing to
161 print_source_lines when using get_lines_to_list. An instance of this
162 class can be built from a single line number and a direction (forward or
163 backward) the range is then computed using get_lines_to_list. */
164 class source_lines_range
167 /* When constructing the range from a single line number, does the line
168 range extend forward, or backward. */
175 /* Construct a SOURCE_LINES_RANGE starting at STARTLINE and extending in
176 direction DIR. The number of lines is from GET_LINES_TO_LIST. If the
177 direction is backward then the start is actually (STARTLINE -
178 GET_LINES_TO_LIST). There is also logic in place to ensure the start
179 is always 1 or more, and the end will be at most INT_MAX. */
180 explicit source_lines_range (int startline, direction dir = FORWARD);
182 /* Construct a SOURCE_LINES_RANGE from STARTLINE to STOPLINE. */
183 explicit source_lines_range (int startline, int stopline)
184 : m_startline (startline),
185 m_stopline (stopline)
188 /* Return the line to start listing from. */
189 int startline () const
190 { return m_startline; }
192 /* Return the line after the last line that should be listed. */
193 int stopline () const
194 { return m_stopline; }
198 /* The start and end of the range. */
203 /* Variation of previous print_source_lines that takes a range instead of a
204 start and end line number. */
205 extern void print_source_lines (struct symtab *s, source_lines_range r,
206 print_source_lines_flags flags);
208 /* Forget line positions and file names for the symtabs in a
209 particular objfile. */
210 extern void forget_cached_source_info_for_objfile (struct objfile *);
212 /* Forget what we learned about line positions in source files, and
213 which directories contain them; must check again now since files
214 may be found in a different directory now. */
215 extern void forget_cached_source_info (void);
217 /* Set the source file default for the "list" command to be S.
219 If S is NULL, and we don't have a default, find one. This
220 should only be called when the user actually tries to use the
221 default, since we produce an error if we can't find a reasonable
222 default. Also, since this can cause symbols to be read, doing it
223 before we need to would make things slower than necessary. */
224 extern void select_source_symtab (struct symtab *s);