eeb1af437c
This patch refactors string_to_event_location, breaking it into two separate functions: 1) string_to_event_location_basic A "basic" string parser that implements support for "legacy" linespecs (linespec, address, and probe locations). This function is intended to be used by any UI wishing/needing to support this legacy behavior. 2) string_to_event_location This is now intended as a CLI-only function which adds explicit location parsing in a CLI-appropriate manner (in the form of traditional option/value pairs). Together these patches serve to simplify string-to-event location parsing for all existing non-CLI interfaces (MI, guile, and python). gdb/ChangeLog * location.c (string_to_explicit_location): Note that "-p" is reserved for probe locations and return NULL for any input that starts with that. (string_to_event_location): Move "legacy" linespec code to ... (string_to_event_location_basic): ... here. * location.h (string_to_event_location): Update comment. (string_to_event_location_basic): New function.
253 lines
8 KiB
C
253 lines
8 KiB
C
/* Data structures and API for event locations in GDB.
|
|
Copyright (C) 2013-2016 Free Software Foundation, Inc.
|
|
|
|
This file is part of GDB.
|
|
|
|
This program is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 3 of the License, or
|
|
(at your option) any later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program. If not, see <http://www.gnu.org/licenses/>. */
|
|
|
|
#ifndef LOCATIONS_H
|
|
#define LOCATIONS_H 1
|
|
|
|
struct language_defn;
|
|
struct event_location;
|
|
|
|
/* An enumeration of possible signs for a line offset. */
|
|
|
|
enum offset_relative_sign
|
|
{
|
|
/* No sign */
|
|
LINE_OFFSET_NONE,
|
|
|
|
/* A plus sign ("+") */
|
|
LINE_OFFSET_PLUS,
|
|
|
|
/* A minus sign ("-") */
|
|
LINE_OFFSET_MINUS,
|
|
|
|
/* A special "sign" for unspecified offset. */
|
|
LINE_OFFSET_UNKNOWN
|
|
};
|
|
|
|
/* A line offset in a location. */
|
|
|
|
struct line_offset
|
|
{
|
|
/* Line offset and any specified sign. */
|
|
int offset;
|
|
enum offset_relative_sign sign;
|
|
};
|
|
|
|
/* An enumeration of the various ways to specify a stop event
|
|
location (used with create_breakpoint). */
|
|
|
|
enum event_location_type
|
|
{
|
|
/* A traditional linespec. */
|
|
LINESPEC_LOCATION,
|
|
|
|
/* An address in the inferior. */
|
|
ADDRESS_LOCATION,
|
|
|
|
/* An explicit location. */
|
|
EXPLICIT_LOCATION,
|
|
|
|
/* A probe location. */
|
|
PROBE_LOCATION
|
|
};
|
|
|
|
/* An explicit location. This structure is used to bypass the
|
|
parsing done on linespecs. It still has the same requirements
|
|
as linespecs, though. For example, source_filename requires
|
|
at least one other field. */
|
|
|
|
struct explicit_location
|
|
{
|
|
/* The source filename. Malloc'd. */
|
|
char *source_filename;
|
|
|
|
/* The function name. Malloc'd. */
|
|
char *function_name;
|
|
|
|
/* The name of a label. Malloc'd. */
|
|
char *label_name;
|
|
|
|
/* A line offset relative to the start of the symbol
|
|
identified by the above fields or the current symtab
|
|
if the other fields are NULL. */
|
|
struct line_offset line_offset;
|
|
};
|
|
|
|
/* Return the type of the given event location. */
|
|
|
|
extern enum event_location_type
|
|
event_location_type (const struct event_location *);
|
|
|
|
/* Return a malloc'd explicit string representation of the given
|
|
explicit location. The location must already be canonicalized/valid. */
|
|
|
|
extern char *
|
|
explicit_location_to_string (const struct explicit_location *explicit_loc);
|
|
|
|
/* Return a malloc'd linespec string representation of the given
|
|
explicit location. The location must already be canonicalized/valid. */
|
|
|
|
extern char *
|
|
explicit_location_to_linespec (const struct explicit_location *explicit_loc);
|
|
|
|
/* Return a string representation of the LOCATION.
|
|
This function may return NULL for unspecified linespecs,
|
|
e.g, LOCATION_LINESPEC and addr_string is NULL.
|
|
|
|
The result is cached in LOCATION. */
|
|
|
|
extern const char *
|
|
event_location_to_string (struct event_location *location);
|
|
|
|
/* Create a new linespec location. The return result is malloc'd
|
|
and should be freed with delete_event_location. */
|
|
|
|
extern struct event_location *
|
|
new_linespec_location (char **linespec);
|
|
|
|
/* Return the linespec location (a string) of the given event_location
|
|
(which must be of type LINESPEC_LOCATION). */
|
|
|
|
extern const char *
|
|
get_linespec_location (const struct event_location *location);
|
|
|
|
/* Create a new address location.
|
|
ADDR is the address corresponding to this event_location.
|
|
ADDR_STRING, a string of ADDR_STRING_LEN characters, is
|
|
the expression that was parsed to determine the address ADDR. */
|
|
|
|
extern struct event_location *
|
|
new_address_location (CORE_ADDR addr, const char *addr_string,
|
|
int addr_string_len);
|
|
|
|
/* Return the address location (a CORE_ADDR) of the given event_location
|
|
(which must be of type ADDRESS_LOCATION). */
|
|
|
|
extern CORE_ADDR
|
|
get_address_location (const struct event_location *location);
|
|
|
|
/* Return the expression (a string) that was used to compute the address
|
|
of the given event_location (which must be of type ADDRESS_LOCATION). */
|
|
|
|
extern const char *
|
|
get_address_string_location (const struct event_location *location);
|
|
|
|
/* Create a new probe location. The return result is malloc'd
|
|
and should be freed with delete_event_location. */
|
|
|
|
extern struct event_location *
|
|
new_probe_location (const char *probe);
|
|
|
|
/* Return the probe location (a string) of the given event_location
|
|
(which must be of type PROBE_LOCATION). */
|
|
|
|
extern const char *
|
|
get_probe_location (const struct event_location *location);
|
|
|
|
/* Initialize the given explicit location. */
|
|
|
|
extern void
|
|
initialize_explicit_location (struct explicit_location *explicit_loc);
|
|
|
|
/* Create a new explicit location. If not NULL, EXPLICIT is checked for
|
|
validity. If invalid, an exception is thrown.
|
|
|
|
The return result is malloc'd and should be freed with
|
|
delete_event_location. */
|
|
|
|
extern struct event_location *
|
|
new_explicit_location (const struct explicit_location *explicit_loc);
|
|
|
|
/* Return the explicit location of the given event_location
|
|
(which must be of type EXPLICIT_LOCATION). */
|
|
|
|
extern struct explicit_location *
|
|
get_explicit_location (struct event_location *location);
|
|
|
|
/* A const version of the above. */
|
|
|
|
extern const struct explicit_location *
|
|
get_explicit_location_const (const struct event_location *location);
|
|
|
|
/* Free an event location and any associated data. */
|
|
|
|
extern void delete_event_location (struct event_location *location);
|
|
|
|
/* Make a cleanup to free LOCATION. */
|
|
|
|
extern struct cleanup *
|
|
make_cleanup_delete_event_location (struct event_location *location);
|
|
|
|
/* Return a copy of the given SRC location. */
|
|
|
|
extern struct event_location *
|
|
copy_event_location (const struct event_location *src);
|
|
|
|
/* Attempt to convert the input string in *ARGP into an event_location.
|
|
ARGP is advanced past any processed input. Returns an event_location
|
|
(malloc'd) if an event location was successfully found in *ARGP,
|
|
NULL otherwise.
|
|
|
|
This function may call error() if *ARGP looks like properly formed,
|
|
but invalid, input, e.g., if it is called with missing argument parameters
|
|
or invalid options.
|
|
|
|
The return result must be freed with delete_event_location.
|
|
|
|
This function is intended to be used by CLI commands and will parse
|
|
explicit locations in a CLI-centric way. Other interfaces should use
|
|
string_to_event_location_basic if they want to maintain support for
|
|
legacy specifications of probe, address, and linespec locations. */
|
|
|
|
extern struct event_location *
|
|
string_to_event_location (char **argp,
|
|
const struct language_defn *langauge);
|
|
|
|
/* Like string_to_event_location, but does not attempt to parse explicit
|
|
locations. */
|
|
|
|
extern struct event_location *
|
|
string_to_event_location_basic (char **argp,
|
|
const struct language_defn *language);
|
|
|
|
/* Attempt to convert the input string in *ARGP into an explicit location.
|
|
ARGP is advanced past any processed input. Returns an event_location
|
|
(malloc'd) if an explicit location was successfully found in *ARGP,
|
|
NULL otherwise.
|
|
|
|
IF !DONT_THROW, this function may call error() if *ARGP looks like
|
|
properly formed input, e.g., if it is called with missing argument
|
|
parameters or invalid options. If DONT_THROW is non-zero, this function
|
|
will not throw any exceptions. */
|
|
|
|
extern struct event_location *
|
|
string_to_explicit_location (const char **argp,
|
|
const struct language_defn *langauge,
|
|
int dont_throw);
|
|
|
|
/* A convenience function for testing for unset locations. */
|
|
|
|
extern int event_location_empty_p (const struct event_location *location);
|
|
|
|
/* Set the location's string representation. If STRING is NULL, clear
|
|
the string representation. */
|
|
|
|
extern void
|
|
set_event_location_string (struct event_location *location,
|
|
const char *string);
|
|
#endif /* LOCATIONS_H */
|