1 /* Data structures and API for event locations in GDB.
2 Copyright (C) 2013-2019 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/>. */
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 /* A traditional linespec. */
71 struct linespec_location
73 /* Whether the function name is fully-qualified or not. */
74 symbol_name_match_type match_type;
80 /* An explicit location. This structure is used to bypass the
81 parsing done on linespecs. It still has the same requirements
82 as linespecs, though. For example, source_filename requires
83 at least one other field. */
85 struct explicit_location
87 /* The source filename. Malloc'd. */
88 char *source_filename;
90 /* The function name. Malloc'd. */
93 /* Whether the function name is fully-qualified or not. */
94 symbol_name_match_type func_name_match_type;
96 /* The name of a label. Malloc'd. */
99 /* A line offset relative to the start of the symbol
100 identified by the above fields or the current symtab
101 if the other fields are NULL. */
102 struct line_offset line_offset;
105 /* Return the type of the given event location. */
107 extern enum event_location_type
108 event_location_type (const struct event_location *);
110 /* Return a malloc'd explicit string representation of the given
111 explicit location. The location must already be canonicalized/valid. */
114 explicit_location_to_string (const struct explicit_location *explicit_loc);
116 /* Return a malloc'd linespec string representation of the given
117 explicit location. The location must already be canonicalized/valid. */
120 explicit_location_to_linespec (const struct explicit_location *explicit_loc);
122 /* Return a string representation of the LOCATION.
123 This function may return NULL for unspecified linespecs,
124 e.g, LINESPEC_LOCATION and spec_string is NULL.
126 The result is cached in LOCATION. */
129 event_location_to_string (struct event_location *location);
131 /* A deleter for a struct event_location. */
133 struct event_location_deleter
135 void operator() (event_location *location) const;
138 /* A unique pointer for event_location. */
139 typedef std::unique_ptr<event_location, event_location_deleter>
142 /* Create a new linespec location. */
144 extern event_location_up new_linespec_location
145 (const char **linespec, symbol_name_match_type match_type);
147 /* Return the linespec location of the given event_location (which
148 must be of type LINESPEC_LOCATION). */
150 extern const linespec_location *
151 get_linespec_location (const struct event_location *location);
153 /* Create a new address location.
154 ADDR is the address corresponding to this event_location.
155 ADDR_STRING, a string of ADDR_STRING_LEN characters, is
156 the expression that was parsed to determine the address ADDR. */
158 extern event_location_up new_address_location (CORE_ADDR addr,
159 const char *addr_string,
160 int addr_string_len);
162 /* Return the address location (a CORE_ADDR) of the given event_location
163 (which must be of type ADDRESS_LOCATION). */
166 get_address_location (const struct event_location *location);
168 /* Return the expression (a string) that was used to compute the address
169 of the given event_location (which must be of type ADDRESS_LOCATION). */
172 get_address_string_location (const struct event_location *location);
174 /* Create a new probe location. */
176 extern event_location_up new_probe_location (const char *probe);
178 /* Return the probe location (a string) of the given event_location
179 (which must be of type PROBE_LOCATION). */
182 get_probe_location (const struct event_location *location);
184 /* Initialize the given explicit location. */
187 initialize_explicit_location (struct explicit_location *explicit_loc);
189 /* Create a new explicit location. If not NULL, EXPLICIT is checked for
190 validity. If invalid, an exception is thrown. */
192 extern event_location_up
193 new_explicit_location (const struct explicit_location *explicit_loc);
195 /* Return the explicit location of the given event_location
196 (which must be of type EXPLICIT_LOCATION). */
198 extern struct explicit_location *
199 get_explicit_location (struct event_location *location);
201 /* A const version of the above. */
203 extern const struct explicit_location *
204 get_explicit_location_const (const struct event_location *location);
206 /* Return a copy of the given SRC location. */
208 extern event_location_up
209 copy_event_location (const struct event_location *src);
211 /* Attempt to convert the input string in *ARGP into an event_location.
212 ARGP is advanced past any processed input. Returns an event_location
213 (malloc'd) if an event location was successfully found in *ARGP,
216 This function may call error() if *ARGP looks like properly formed,
217 but invalid, input, e.g., if it is called with missing argument parameters
220 This function is intended to be used by CLI commands and will parse
221 explicit locations in a CLI-centric way. Other interfaces should use
222 string_to_event_location_basic if they want to maintain support for
223 legacy specifications of probe, address, and linespec locations.
225 MATCH_TYPE should be either WILD or FULL. If -q/--qualified is specified
226 in the input string, it will take precedence over this parameter. */
228 extern event_location_up string_to_event_location
229 (const char **argp, const struct language_defn *langauge,
230 symbol_name_match_type match_type = symbol_name_match_type::WILD);
232 /* Like string_to_event_location, but does not attempt to parse
233 explicit locations. MATCH_TYPE indicates how function names should
236 extern event_location_up
237 string_to_event_location_basic (const char **argp,
238 const struct language_defn *language,
239 symbol_name_match_type match_type);
241 /* Structure filled in by string_to_explicit_location to aid the
243 struct explicit_completion_info
245 /* Pointer to the last option found. E.g., in "b -sou src.c -fun
246 func", LAST_OPTION is left pointing at "-fun func". */
247 const char *last_option = NULL;
249 /* These point to the start and end of a quoted argument, iff the
250 last argument was quoted. If parsing finds an incomplete quoted
251 string (e.g., "break -function 'fun"), then QUOTED_ARG_START is
252 set to point to the opening \', and QUOTED_ARG_END is left NULL.
253 If the last option is not quoted, then both are set to NULL. */
254 const char *quoted_arg_start = NULL;
255 const char *quoted_arg_end = NULL;
257 /* True if we saw an explicit location option, as opposed to only
258 flags that affect both explicit locations and linespecs, like
260 bool saw_explicit_location_option = false;
263 /* Attempt to convert the input string in *ARGP into an explicit location.
264 ARGP is advanced past any processed input. Returns an event_location
265 (malloc'd) if an explicit location was successfully found in *ARGP,
268 If COMPLETION_INFO is NULL, this function may call error() if *ARGP
269 looks like improperly formed input, e.g., if it is called with
270 missing argument parameters or invalid options. If COMPLETION_INFO
271 is not NULL, this function will not throw any exceptions. */
273 extern event_location_up
274 string_to_explicit_location (const char **argp,
275 const struct language_defn *language,
276 explicit_completion_info *completion_info);
278 /* A convenience function for testing for unset locations. */
280 extern int event_location_empty_p (const struct event_location *location);
282 /* Set the location's string representation. If STRING is NULL, clear
283 the string representation. */
286 set_event_location_string (struct event_location *location,
289 #endif /* LOCATION_H */