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 /* A deleter for a struct event_location. */
119 struct event_location_deleter
121 void operator() (event_location *location) const;
124 /* A unique pointer for event_location. */
125 typedef std::unique_ptr<event_location, event_location_deleter>
128 /* Create a new linespec location. */
130 extern event_location_up new_linespec_location (char **linespec);
132 /* Return the linespec location (a string) of the given event_location
133 (which must be of type LINESPEC_LOCATION). */
136 get_linespec_location (const struct event_location *location);
138 /* Create a new address location.
139 ADDR is the address corresponding to this event_location.
140 ADDR_STRING, a string of ADDR_STRING_LEN characters, is
141 the expression that was parsed to determine the address ADDR. */
143 extern event_location_up new_address_location (CORE_ADDR addr,
144 const char *addr_string,
145 int addr_string_len);
147 /* Return the address location (a CORE_ADDR) of the given event_location
148 (which must be of type ADDRESS_LOCATION). */
151 get_address_location (const struct event_location *location);
153 /* Return the expression (a string) that was used to compute the address
154 of the given event_location (which must be of type ADDRESS_LOCATION). */
157 get_address_string_location (const struct event_location *location);
159 /* Create a new probe location. */
161 extern event_location_up new_probe_location (const char *probe);
163 /* Return the probe location (a string) of the given event_location
164 (which must be of type PROBE_LOCATION). */
167 get_probe_location (const struct event_location *location);
169 /* Initialize the given explicit location. */
172 initialize_explicit_location (struct explicit_location *explicit_loc);
174 /* Create a new explicit location. If not NULL, EXPLICIT is checked for
175 validity. If invalid, an exception is thrown. */
177 extern event_location_up
178 new_explicit_location (const struct explicit_location *explicit_loc);
180 /* Return the explicit location of the given event_location
181 (which must be of type EXPLICIT_LOCATION). */
183 extern struct explicit_location *
184 get_explicit_location (struct event_location *location);
186 /* A const version of the above. */
188 extern const struct explicit_location *
189 get_explicit_location_const (const struct event_location *location);
191 /* Return a copy of the given SRC location. */
193 extern event_location_up
194 copy_event_location (const struct event_location *src);
196 /* Attempt to convert the input string in *ARGP into an event_location.
197 ARGP is advanced past any processed input. Returns an event_location
198 (malloc'd) if an event location was successfully found in *ARGP,
201 This function may call error() if *ARGP looks like properly formed,
202 but invalid, input, e.g., if it is called with missing argument parameters
205 This function is intended to be used by CLI commands and will parse
206 explicit locations in a CLI-centric way. Other interfaces should use
207 string_to_event_location_basic if they want to maintain support for
208 legacy specifications of probe, address, and linespec locations. */
210 extern event_location_up
211 string_to_event_location (char **argp,
212 const struct language_defn *langauge);
214 /* Like string_to_event_location, but does not attempt to parse explicit
217 extern event_location_up
218 string_to_event_location_basic (char **argp,
219 const struct language_defn *language);
221 /* Structure filled in by string_to_explicit_location to aid the
223 struct explicit_completion_info
225 /* Pointer to the last option found. E.g., in "b -sou src.c -fun
226 func", LAST_OPTION is left pointing at "-fun func". */
227 const char *last_option = NULL;
229 /* These point to the start and end of a quoted argument, iff the
230 last argument was quoted. If parsing finds an incomplete quoted
231 string (e.g., "break -function 'fun"), then QUOTED_ARG_START is
232 set to point to the opening \', and QUOTED_ARG_END is left NULL.
233 If the last option is not quoted, then both are set to NULL. */
234 const char *quoted_arg_start = NULL;
235 const char *quoted_arg_end = NULL;
238 /* Attempt to convert the input string in *ARGP into an explicit location.
239 ARGP is advanced past any processed input. Returns an event_location
240 (malloc'd) if an explicit location was successfully found in *ARGP,
243 If COMPLETION_INFO is NULL, this function may call error() if *ARGP
244 looks like improperly formed input, e.g., if it is called with
245 missing argument parameters or invalid options. If COMPLETION_INFO
246 is not NULL, this function will not throw any exceptions. */
248 extern event_location_up
249 string_to_explicit_location (const char **argp,
250 const struct language_defn *language,
251 explicit_completion_info *completion_info);
253 /* A convenience function for testing for unset locations. */
255 extern int event_location_empty_p (const struct event_location *location);
257 /* Set the location's string representation. If STRING is NULL, clear
258 the string representation. */
261 set_event_location_string (struct event_location *location,
263 #endif /* LOCATIONS_H */