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/* Data structures and API for event locations in GDB.
Copyright (C) 2013-2015 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/>. */
#include "defs.h"
#include "gdb_assert.h"
#include "location.h"
#include "symtab.h"
#include "language.h"
#include "linespec.h"
#include "cli/cli-utils.h"
#include "probe.h"
#include <ctype.h>
#include <string.h>
/* An event location used to set a stop event in the inferior.
This structure is an amalgam of the various ways
to specify where a stop event should be set. */
struct event_location
{
/* The type of this breakpoint specification. */
enum event_location_type type;
#define EL_TYPE(PTR) (PTR)->type
union
{
/* A generic "this is a string specification" for a location.
This representation is used by both "normal" linespecs and
probes. */
char *addr_string;
#define EL_LINESPEC(PTR) ((PTR)->u.addr_string)
} u;
/* Cached string representation of this location. This is used, e.g., to
save stop event locations to file. Malloc'd. */
char *as_string;
#define EL_STRING(PTR) ((PTR)->as_string)
};
/* See description in location.h. */
enum event_location_type
event_location_type (const struct event_location *location)
{
return EL_TYPE (location);
}
/* See description in location.h. */
struct event_location *
new_linespec_location (char **linespec)
{
struct event_location *location;
location = XCNEW (struct event_location);
EL_TYPE (location) = LINESPEC_LOCATION;
if (*linespec != NULL)
{
char *p;
char *orig = *linespec;
linespec_lex_to_end (linespec);
p = remove_trailing_whitespace (orig, *linespec);
if ((p - orig) > 0)
EL_LINESPEC (location) = savestring (orig, p - orig);
}
return location;
}
/* See description in location.h. */
const char *
get_linespec_location (const struct event_location *location)
{
gdb_assert (EL_TYPE (location) == LINESPEC_LOCATION);
return EL_LINESPEC (location);
}
/* See description in location.h. */
struct event_location *
copy_event_location (const struct event_location *src)
{
struct event_location *dst;
dst = XCNEW (struct event_location);
EL_TYPE (dst) = EL_TYPE (src);
if (EL_STRING (src) != NULL)
EL_STRING (dst) = xstrdup (EL_STRING (src));
switch (EL_TYPE (src))
{
case LINESPEC_LOCATION:
if (EL_LINESPEC (src) != NULL)
EL_LINESPEC (dst) = xstrdup (EL_LINESPEC (src));
break;
default:
gdb_assert_not_reached ("unknown event location type");
}
return dst;
}
/* A cleanup function for struct event_location. */
static void
delete_event_location_cleanup (void *data)
{
struct event_location *location = (struct event_location *) data;
delete_event_location (location);
}
/* See description in location.h. */
struct cleanup *
make_cleanup_delete_event_location (struct event_location *location)
{
return make_cleanup (delete_event_location_cleanup, location);
}
/* See description in location.h. */
void
delete_event_location (struct event_location *location)
{
if (location != NULL)
{
xfree (EL_STRING (location));
switch (EL_TYPE (location))
{
case LINESPEC_LOCATION:
xfree (EL_LINESPEC (location));
break;
default:
gdb_assert_not_reached ("unknown event location type");
}
xfree (location);
}
}
/* See description in location.h. */
const char *
event_location_to_string (struct event_location *location)
{
if (EL_STRING (location) == NULL)
{
switch (EL_TYPE (location))
{
case LINESPEC_LOCATION:
if (EL_LINESPEC (location) != NULL)
EL_STRING (location) = xstrdup (EL_LINESPEC (location));
break;
default:
gdb_assert_not_reached ("unknown event location type");
}
}
return EL_STRING (location);
}
/* See description in location.h. */
struct event_location *
string_to_event_location (char **stringp,
const struct language_defn *language)
{
struct event_location *location;
location = new_linespec_location (stringp);
return location;
}
/* See description in location.h. */
int
event_location_empty_p (const struct event_location *location)
{
switch (EL_TYPE (location))
{
case LINESPEC_LOCATION:
/* Linespecs are never "empty." (NULL is a valid linespec) */
return 0;
default:
gdb_assert_not_reached ("unknown event location type");
}
}
/* See description in location.h. */
void
set_event_location_string (struct event_location *location,
const char *string)
{
xfree (EL_STRING (location));
EL_STRING (location) = string == NULL ? NULL : xstrdup (string);
}
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