1 /* Data structures and API for event locations in GDB.
2 Copyright (C) 2013-2017 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/>. */
23 struct event_location
;
25 /* An enumeration of possible signs for a line offset. */
27 enum offset_relative_sign
32 /* A plus sign ("+") */
35 /* A minus sign ("-") */
38 /* A special "sign" for unspecified offset. */
42 /* A line offset in a location. */
46 /* Line offset and any specified sign. */
48 enum offset_relative_sign sign
;
51 /* An enumeration of the various ways to specify a stop event
52 location (used with create_breakpoint). */
54 enum event_location_type
56 /* A traditional linespec. */
59 /* An address in the inferior. */
62 /* An explicit location. */
65 /* A probe location. */
69 /* An explicit location. This structure is used to bypass the
70 parsing done on linespecs. It still has the same requirements
71 as linespecs, though. For example, source_filename requires
72 at least one other field. */
74 struct explicit_location
76 /* The source filename. Malloc'd. */
77 char *source_filename
;
79 /* The function name. Malloc'd. */
82 /* The name of a label. Malloc'd. */
85 /* A line offset relative to the start of the symbol
86 identified by the above fields or the current symtab
87 if the other fields are NULL. */
88 struct line_offset line_offset
;
91 /* Return the type of the given event location. */
93 extern enum event_location_type
94 event_location_type (const struct event_location
*);
96 /* Return a malloc'd explicit string representation of the given
97 explicit location. The location must already be canonicalized/valid. */
100 explicit_location_to_string (const struct explicit_location
*explicit_loc
);
102 /* Return a malloc'd linespec string representation of the given
103 explicit location. The location must already be canonicalized/valid. */
106 explicit_location_to_linespec (const struct explicit_location
*explicit_loc
);
108 /* Return a string representation of the LOCATION.
109 This function may return NULL for unspecified linespecs,
110 e.g, LOCATION_LINESPEC and addr_string is NULL.
112 The result is cached in LOCATION. */
115 event_location_to_string (struct event_location
*location
);
117 /* Free an event location and any associated data. */
119 extern void delete_event_location (struct event_location
*location
);
121 /* A deleter for a struct event_location. */
123 struct event_location_deleter
125 void operator() (event_location
*location
) const
127 delete_event_location (location
);
131 /* A unique pointer for event_location. */
132 typedef std::unique_ptr
<event_location
, event_location_deleter
>
135 /* Create a new linespec location. */
137 extern event_location_up
new_linespec_location (char **linespec
);
139 /* Return the linespec location (a string) of the given event_location
140 (which must be of type LINESPEC_LOCATION). */
143 get_linespec_location (const struct event_location
*location
);
145 /* Create a new address location.
146 ADDR is the address corresponding to this event_location.
147 ADDR_STRING, a string of ADDR_STRING_LEN characters, is
148 the expression that was parsed to determine the address ADDR. */
150 extern event_location_up
new_address_location (CORE_ADDR addr
,
151 const char *addr_string
,
152 int addr_string_len
);
154 /* Return the address location (a CORE_ADDR) of the given event_location
155 (which must be of type ADDRESS_LOCATION). */
158 get_address_location (const struct event_location
*location
);
160 /* Return the expression (a string) that was used to compute the address
161 of the given event_location (which must be of type ADDRESS_LOCATION). */
164 get_address_string_location (const struct event_location
*location
);
166 /* Create a new probe location. */
168 extern event_location_up
new_probe_location (const char *probe
);
170 /* Return the probe location (a string) of the given event_location
171 (which must be of type PROBE_LOCATION). */
174 get_probe_location (const struct event_location
*location
);
176 /* Initialize the given explicit location. */
179 initialize_explicit_location (struct explicit_location
*explicit_loc
);
181 /* Create a new explicit location. If not NULL, EXPLICIT is checked for
182 validity. If invalid, an exception is thrown. */
184 extern event_location_up
185 new_explicit_location (const struct explicit_location
*explicit_loc
);
187 /* Return the explicit location of the given event_location
188 (which must be of type EXPLICIT_LOCATION). */
190 extern struct explicit_location
*
191 get_explicit_location (struct event_location
*location
);
193 /* A const version of the above. */
195 extern const struct explicit_location
*
196 get_explicit_location_const (const struct event_location
*location
);
198 /* Return a copy of the given SRC location. */
200 extern event_location_up
201 copy_event_location (const struct event_location
*src
);
203 /* Attempt to convert the input string in *ARGP into an event_location.
204 ARGP is advanced past any processed input. Returns an event_location
205 (malloc'd) if an event location was successfully found in *ARGP,
208 This function may call error() if *ARGP looks like properly formed,
209 but invalid, input, e.g., if it is called with missing argument parameters
212 This function is intended to be used by CLI commands and will parse
213 explicit locations in a CLI-centric way. Other interfaces should use
214 string_to_event_location_basic if they want to maintain support for
215 legacy specifications of probe, address, and linespec locations. */
217 extern event_location_up
218 string_to_event_location (char **argp
,
219 const struct language_defn
*langauge
);
221 /* Like string_to_event_location, but does not attempt to parse explicit
224 extern event_location_up
225 string_to_event_location_basic (char **argp
,
226 const struct language_defn
*language
);
228 /* Attempt to convert the input string in *ARGP into an explicit location.
229 ARGP is advanced past any processed input. Returns an event_location
230 (malloc'd) if an explicit location was successfully found in *ARGP,
233 IF !DONT_THROW, this function may call error() if *ARGP looks like
234 properly formed input, e.g., if it is called with missing argument
235 parameters or invalid options. If DONT_THROW is non-zero, this function
236 will not throw any exceptions. */
238 extern event_location_up
239 string_to_explicit_location (const char **argp
,
240 const struct language_defn
*langauge
,
243 /* A convenience function for testing for unset locations. */
245 extern int event_location_empty_p (const struct event_location
*location
);
247 /* Set the location's string representation. If STRING is NULL, clear
248 the string representation. */
251 set_event_location_string (struct event_location
*location
,
253 #endif /* LOCATIONS_H */