941 lines
25 KiB
C
941 lines
25 KiB
C
/* Data structures and API for event locations in GDB.
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Copyright (C) 2013-2017 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include "defs.h"
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#include "gdb_assert.h"
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#include "location.h"
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#include "symtab.h"
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#include "language.h"
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#include "linespec.h"
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#include "cli/cli-utils.h"
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#include "probe.h"
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#include "cp-support.h"
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#include <ctype.h>
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#include <string.h>
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/* An event location used to set a stop event in the inferior.
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This structure is an amalgam of the various ways
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to specify where a stop event should be set. */
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struct event_location
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{
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/* The type of this breakpoint specification. */
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enum event_location_type type;
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#define EL_TYPE(P) (P)->type
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union
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{
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/* A generic "this is a string specification" for a location.
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This representation is used by both "normal" linespecs and
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probes. */
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char *addr_string;
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#define EL_LINESPEC(P) ((P)->u.addr_string)
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#define EL_PROBE(P) ((P)->u.addr_string)
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/* An address in the inferior. */
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CORE_ADDR address;
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#define EL_ADDRESS(P) (P)->u.address
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/* An explicit location. */
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struct explicit_location explicit_loc;
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#define EL_EXPLICIT(P) (&((P)->u.explicit_loc))
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} u;
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/* Cached string representation of this location. This is used, e.g., to
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save stop event locations to file. Malloc'd. */
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char *as_string;
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#define EL_STRING(P) ((P)->as_string)
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};
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/* See description in location.h. */
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enum event_location_type
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event_location_type (const struct event_location *location)
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{
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return EL_TYPE (location);
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}
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/* See description in location.h. */
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void
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initialize_explicit_location (struct explicit_location *explicit_loc)
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{
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memset (explicit_loc, 0, sizeof (struct explicit_location));
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explicit_loc->line_offset.sign = LINE_OFFSET_UNKNOWN;
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}
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/* See description in location.h. */
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event_location_up
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new_linespec_location (char **linespec)
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{
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struct event_location *location;
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location = XCNEW (struct event_location);
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EL_TYPE (location) = LINESPEC_LOCATION;
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if (*linespec != NULL)
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{
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char *p;
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char *orig = *linespec;
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linespec_lex_to_end (linespec);
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p = remove_trailing_whitespace (orig, *linespec);
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if ((p - orig) > 0)
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EL_LINESPEC (location) = savestring (orig, p - orig);
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}
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return event_location_up (location);
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}
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/* See description in location.h. */
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const char *
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get_linespec_location (const struct event_location *location)
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{
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gdb_assert (EL_TYPE (location) == LINESPEC_LOCATION);
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return EL_LINESPEC (location);
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}
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/* See description in location.h. */
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event_location_up
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new_address_location (CORE_ADDR addr, const char *addr_string,
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int addr_string_len)
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{
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struct event_location *location;
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location = XCNEW (struct event_location);
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EL_TYPE (location) = ADDRESS_LOCATION;
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EL_ADDRESS (location) = addr;
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if (addr_string != NULL)
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EL_STRING (location) = xstrndup (addr_string, addr_string_len);
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return event_location_up (location);
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}
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/* See description in location.h. */
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CORE_ADDR
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get_address_location (const struct event_location *location)
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{
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gdb_assert (EL_TYPE (location) == ADDRESS_LOCATION);
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return EL_ADDRESS (location);
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}
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/* See description in location.h. */
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const char *
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get_address_string_location (const struct event_location *location)
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{
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gdb_assert (EL_TYPE (location) == ADDRESS_LOCATION);
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return EL_STRING (location);
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}
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/* See description in location.h. */
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event_location_up
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new_probe_location (const char *probe)
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{
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struct event_location *location;
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location = XCNEW (struct event_location);
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EL_TYPE (location) = PROBE_LOCATION;
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if (probe != NULL)
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EL_PROBE (location) = xstrdup (probe);
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return event_location_up (location);
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}
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/* See description in location.h. */
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const char *
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get_probe_location (const struct event_location *location)
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{
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gdb_assert (EL_TYPE (location) == PROBE_LOCATION);
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return EL_PROBE (location);
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}
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/* See description in location.h. */
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event_location_up
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new_explicit_location (const struct explicit_location *explicit_loc)
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{
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struct event_location tmp;
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memset (&tmp, 0, sizeof (struct event_location));
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EL_TYPE (&tmp) = EXPLICIT_LOCATION;
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initialize_explicit_location (EL_EXPLICIT (&tmp));
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if (explicit_loc != NULL)
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{
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if (explicit_loc->source_filename != NULL)
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{
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EL_EXPLICIT (&tmp)->source_filename
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= explicit_loc->source_filename;
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}
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if (explicit_loc->function_name != NULL)
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EL_EXPLICIT (&tmp)->function_name
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= explicit_loc->function_name;
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if (explicit_loc->label_name != NULL)
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EL_EXPLICIT (&tmp)->label_name = explicit_loc->label_name;
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if (explicit_loc->line_offset.sign != LINE_OFFSET_UNKNOWN)
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EL_EXPLICIT (&tmp)->line_offset = explicit_loc->line_offset;
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}
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return copy_event_location (&tmp);
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}
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/* See description in location.h. */
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struct explicit_location *
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get_explicit_location (struct event_location *location)
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{
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gdb_assert (EL_TYPE (location) == EXPLICIT_LOCATION);
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return EL_EXPLICIT (location);
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}
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/* See description in location.h. */
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const struct explicit_location *
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get_explicit_location_const (const struct event_location *location)
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{
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gdb_assert (EL_TYPE (location) == EXPLICIT_LOCATION);
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return EL_EXPLICIT (location);
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}
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/* This convenience function returns a malloc'd string which
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represents the location in EXPLICIT_LOC.
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AS_LINESPEC is non-zero if this string should be a linespec.
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Otherwise it will be output in explicit form. */
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static char *
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explicit_to_string_internal (int as_linespec,
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const struct explicit_location *explicit_loc)
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{
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int need_space = 0;
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char space = as_linespec ? ':' : ' ';
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string_file buf;
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if (explicit_loc->source_filename != NULL)
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{
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if (!as_linespec)
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buf.puts ("-source ");
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buf.puts (explicit_loc->source_filename);
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need_space = 1;
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}
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if (explicit_loc->function_name != NULL)
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{
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if (need_space)
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buf.putc (space);
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if (!as_linespec)
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buf.puts ("-function ");
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buf.puts (explicit_loc->function_name);
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need_space = 1;
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}
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if (explicit_loc->label_name != NULL)
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{
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if (need_space)
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buf.putc (space);
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if (!as_linespec)
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buf.puts ("-label ");
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buf.puts (explicit_loc->label_name);
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need_space = 1;
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}
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if (explicit_loc->line_offset.sign != LINE_OFFSET_UNKNOWN)
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{
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if (need_space)
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buf.putc (space);
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if (!as_linespec)
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buf.puts ("-line ");
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buf.printf ("%s%d",
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(explicit_loc->line_offset.sign == LINE_OFFSET_NONE ? ""
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: (explicit_loc->line_offset.sign
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== LINE_OFFSET_PLUS ? "+" : "-")),
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explicit_loc->line_offset.offset);
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}
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return xstrdup (buf.c_str ());
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}
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/* See description in location.h. */
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char *
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explicit_location_to_string (const struct explicit_location *explicit_loc)
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{
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return explicit_to_string_internal (0, explicit_loc);
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}
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/* See description in location.h. */
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char *
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explicit_location_to_linespec (const struct explicit_location *explicit_loc)
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{
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return explicit_to_string_internal (1, explicit_loc);
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}
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/* See description in location.h. */
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event_location_up
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copy_event_location (const struct event_location *src)
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{
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struct event_location *dst;
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dst = XCNEW (struct event_location);
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EL_TYPE (dst) = EL_TYPE (src);
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if (EL_STRING (src) != NULL)
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EL_STRING (dst) = xstrdup (EL_STRING (src));
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switch (EL_TYPE (src))
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{
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case LINESPEC_LOCATION:
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if (EL_LINESPEC (src) != NULL)
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EL_LINESPEC (dst) = xstrdup (EL_LINESPEC (src));
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break;
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case ADDRESS_LOCATION:
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EL_ADDRESS (dst) = EL_ADDRESS (src);
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break;
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case EXPLICIT_LOCATION:
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if (EL_EXPLICIT (src)->source_filename != NULL)
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EL_EXPLICIT (dst)->source_filename
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= xstrdup (EL_EXPLICIT (src)->source_filename);
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if (EL_EXPLICIT (src)->function_name != NULL)
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EL_EXPLICIT (dst)->function_name
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= xstrdup (EL_EXPLICIT (src)->function_name);
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if (EL_EXPLICIT (src)->label_name != NULL)
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EL_EXPLICIT (dst)->label_name = xstrdup (EL_EXPLICIT (src)->label_name);
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EL_EXPLICIT (dst)->line_offset = EL_EXPLICIT (src)->line_offset;
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break;
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case PROBE_LOCATION:
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if (EL_PROBE (src) != NULL)
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EL_PROBE (dst) = xstrdup (EL_PROBE (src));
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break;
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default:
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gdb_assert_not_reached ("unknown event location type");
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}
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return event_location_up (dst);
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}
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void
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event_location_deleter::operator() (event_location *location) const
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{
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if (location != NULL)
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{
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xfree (EL_STRING (location));
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switch (EL_TYPE (location))
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{
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case LINESPEC_LOCATION:
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xfree (EL_LINESPEC (location));
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break;
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case ADDRESS_LOCATION:
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/* Nothing to do. */
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break;
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case EXPLICIT_LOCATION:
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xfree (EL_EXPLICIT (location)->source_filename);
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xfree (EL_EXPLICIT (location)->function_name);
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xfree (EL_EXPLICIT (location)->label_name);
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break;
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case PROBE_LOCATION:
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xfree (EL_PROBE (location));
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break;
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default:
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gdb_assert_not_reached ("unknown event location type");
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}
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xfree (location);
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}
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}
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/* See description in location.h. */
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const char *
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event_location_to_string (struct event_location *location)
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{
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if (EL_STRING (location) == NULL)
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{
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switch (EL_TYPE (location))
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{
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case LINESPEC_LOCATION:
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if (EL_LINESPEC (location) != NULL)
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EL_STRING (location) = xstrdup (EL_LINESPEC (location));
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break;
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case ADDRESS_LOCATION:
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EL_STRING (location)
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= xstrprintf ("*%s",
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core_addr_to_string (EL_ADDRESS (location)));
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break;
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case EXPLICIT_LOCATION:
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EL_STRING (location)
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= explicit_location_to_string (EL_EXPLICIT (location));
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break;
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case PROBE_LOCATION:
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EL_STRING (location) = xstrdup (EL_PROBE (location));
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break;
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default:
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gdb_assert_not_reached ("unknown event location type");
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}
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}
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return EL_STRING (location);
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}
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/* Find an instance of the quote character C in the string S that is
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outside of all single- and double-quoted strings (i.e., any quoting
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other than C). */
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static const char *
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find_end_quote (const char *s, char end_quote_char)
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{
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/* zero if we're not in quotes;
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'"' if we're in a double-quoted string;
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'\'' if we're in a single-quoted string. */
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char nested_quote_char = '\0';
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for (const char *scan = s; *scan != '\0'; scan++)
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{
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if (nested_quote_char != '\0')
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{
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if (*scan == nested_quote_char)
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nested_quote_char = '\0';
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else if (scan[0] == '\\' && *(scan + 1) != '\0')
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scan++;
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}
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else if (*scan == end_quote_char && nested_quote_char == '\0')
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return scan;
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else if (*scan == '"' || *scan == '\'')
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nested_quote_char = *scan;
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}
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return 0;
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}
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/* A lexer for explicit locations. This function will advance INP
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past any strings that it lexes. Returns a malloc'd copy of the
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lexed string or NULL if no lexing was done. */
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static gdb::unique_xmalloc_ptr<char>
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explicit_location_lex_one (const char **inp,
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const struct language_defn *language,
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explicit_completion_info *completion_info)
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{
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const char *start = *inp;
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if (*start == '\0')
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return NULL;
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/* If quoted, skip to the ending quote. */
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if (strchr (get_gdb_linespec_parser_quote_characters (), *start))
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{
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if (completion_info != NULL)
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completion_info->quoted_arg_start = start;
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const char *end = find_end_quote (start + 1, *start);
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if (end == NULL)
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{
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if (completion_info == NULL)
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error (_("Unmatched quote, %s."), start);
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end = start + strlen (start);
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*inp = end;
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return gdb::unique_xmalloc_ptr<char> (savestring (start + 1,
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*inp - start - 1));
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}
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if (completion_info != NULL)
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completion_info->quoted_arg_end = end;
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*inp = end + 1;
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return gdb::unique_xmalloc_ptr<char> (savestring (start + 1,
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*inp - start - 2));
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}
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/* If the input starts with '-' or '+', the string ends with the next
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whitespace or comma. */
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if (*start == '-' || *start == '+')
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{
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while (*inp[0] != '\0' && *inp[0] != ',' && !isspace (*inp[0]))
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++(*inp);
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}
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else
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{
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/* Handle numbers first, stopping at the next whitespace or ','. */
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while (isdigit (*inp[0]))
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++(*inp);
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if (*inp[0] == '\0' || isspace (*inp[0]) || *inp[0] == ',')
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return gdb::unique_xmalloc_ptr<char> (savestring (start,
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*inp - start));
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/* Otherwise stop at the next occurrence of whitespace, '\0',
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keyword, or ','. */
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*inp = start;
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while ((*inp)[0]
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&& (*inp)[0] != ','
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&& !(isspace ((*inp)[0])
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|| linespec_lexer_lex_keyword (&(*inp)[1])))
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{
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/* Special case: C++ operator,. */
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if (language->la_language == language_cplus
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&& startswith (*inp, CP_OPERATOR_STR))
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(*inp) += CP_OPERATOR_LEN;
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++(*inp);
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}
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}
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if (*inp - start > 0)
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return gdb::unique_xmalloc_ptr<char> (savestring (start, *inp - start));
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return NULL;
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}
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/* Return true if COMMA points past "operator". START is the start of
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the line that COMMAND points to, hence when reading backwards, we
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must not read any character before START. */
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static bool
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is_cp_operator (const char *start, const char *comma)
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{
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if (comma != NULL
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&& (comma - start) >= CP_OPERATOR_LEN)
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{
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const char *p = comma;
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while (p > start && isspace (p[-1]))
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p--;
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if (p - start >= CP_OPERATOR_LEN)
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{
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p -= CP_OPERATOR_LEN;
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if (strncmp (p, CP_OPERATOR_STR, CP_OPERATOR_LEN) == 0
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&& (p == start
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|| !(isalnum (p[-1]) || p[-1] == '_')))
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{
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return true;
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}
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}
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}
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return false;
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}
|
|
|
|
/* When scanning the input string looking for the next explicit
|
|
location option/delimiter, we jump to the next option by looking
|
|
for ",", and "-". Such a character can also appear in C++ symbols
|
|
like "operator," and "operator-". So when we find such a
|
|
character, we call this function to check if we found such a
|
|
symbol, meaning we had a false positive for an option string. In
|
|
that case, we keep looking for the next delimiter, until we find
|
|
one that is not a false positive, or we reach end of string. FOUND
|
|
is the character that scanning found (either '-' or ','), and START
|
|
is the start of the line that FOUND points to, hence when reading
|
|
backwards, we must not read any character before START. Returns a
|
|
pointer to the next non-false-positive delimiter character, or NULL
|
|
if none was found. */
|
|
|
|
static const char *
|
|
skip_op_false_positives (const char *start, const char *found)
|
|
{
|
|
while (found != NULL && is_cp_operator (start, found))
|
|
{
|
|
if (found[0] == '-' && found[1] == '-')
|
|
start = found + 2;
|
|
else
|
|
start = found + 1;
|
|
found = find_toplevel_char (start, *found);
|
|
}
|
|
|
|
return found;
|
|
}
|
|
|
|
/* Assuming both FIRST and NEW_TOK point into the same string, return
|
|
the pointer that is closer to the start of the string. If FIRST is
|
|
NULL, returns NEW_TOK. If NEW_TOK is NULL, returns FIRST. */
|
|
|
|
static const char *
|
|
first_of (const char *first, const char *new_tok)
|
|
{
|
|
if (first == NULL)
|
|
return new_tok;
|
|
else if (new_tok != NULL && new_tok < first)
|
|
return new_tok;
|
|
else
|
|
return first;
|
|
}
|
|
|
|
/* A lexer for functions in explicit locations. This function will
|
|
advance INP past a function until the next option, or until end of
|
|
string. Returns a malloc'd copy of the lexed string or NULL if no
|
|
lexing was done. */
|
|
|
|
static gdb::unique_xmalloc_ptr<char>
|
|
explicit_location_lex_one_function (const char **inp,
|
|
const struct language_defn *language,
|
|
explicit_completion_info *completion_info)
|
|
{
|
|
const char *start = *inp;
|
|
|
|
if (*start == '\0')
|
|
return NULL;
|
|
|
|
/* If quoted, skip to the ending quote. */
|
|
if (strchr (get_gdb_linespec_parser_quote_characters (), *start))
|
|
{
|
|
char quote_char = *start;
|
|
|
|
/* If the input is not an Ada operator, skip to the matching
|
|
closing quote and return the string. */
|
|
if (!(language->la_language == language_ada
|
|
&& quote_char == '\"' && is_ada_operator (start)))
|
|
{
|
|
if (completion_info != NULL)
|
|
completion_info->quoted_arg_start = start;
|
|
|
|
const char *end = find_toplevel_char (start + 1, quote_char);
|
|
|
|
if (end == NULL)
|
|
{
|
|
if (completion_info == NULL)
|
|
error (_("Unmatched quote, %s."), start);
|
|
|
|
end = start + strlen (start);
|
|
*inp = end;
|
|
char *saved = savestring (start + 1, *inp - start - 1);
|
|
return gdb::unique_xmalloc_ptr<char> (saved);
|
|
}
|
|
|
|
if (completion_info != NULL)
|
|
completion_info->quoted_arg_end = end;
|
|
*inp = end + 1;
|
|
char *saved = savestring (start + 1, *inp - start - 2);
|
|
return gdb::unique_xmalloc_ptr<char> (saved);
|
|
}
|
|
}
|
|
|
|
const char *comma = find_toplevel_char (start, ',');
|
|
|
|
/* If we have "-function -myfunction", or perhaps better example,
|
|
"-function -[BasicClass doIt]" (objc selector), treat
|
|
"-myfunction" as the function name. I.e., skip the first char if
|
|
it is an hyphen. Don't skip the first char always, because we
|
|
may have C++ "operator<", and find_toplevel_char needs to see the
|
|
'o' in that case. */
|
|
const char *hyphen
|
|
= (*start == '-'
|
|
? find_toplevel_char (start + 1, '-')
|
|
: find_toplevel_char (start, '-'));
|
|
|
|
/* Check for C++ "operator," and "operator-". */
|
|
comma = skip_op_false_positives (start, comma);
|
|
hyphen = skip_op_false_positives (start, hyphen);
|
|
|
|
/* Pick the one that appears first. */
|
|
const char *end = first_of (hyphen, comma);
|
|
|
|
/* See if a linespec keyword appears first. */
|
|
const char *s = start;
|
|
const char *ws = find_toplevel_char (start, ' ');
|
|
while (ws != NULL && linespec_lexer_lex_keyword (ws + 1) == NULL)
|
|
{
|
|
s = ws + 1;
|
|
ws = find_toplevel_char (s, ' ');
|
|
}
|
|
if (ws != NULL)
|
|
end = first_of (end, ws + 1);
|
|
|
|
/* If we don't have any terminator, then take the whole string. */
|
|
if (end == NULL)
|
|
end = start + strlen (start);
|
|
|
|
/* Trim whitespace at the end. */
|
|
while (end > start && end[-1] == ' ')
|
|
end--;
|
|
|
|
*inp = end;
|
|
|
|
if (*inp - start > 0)
|
|
return gdb::unique_xmalloc_ptr<char> (savestring (start, *inp - start));
|
|
|
|
return NULL;
|
|
}
|
|
|
|
/* See description in location.h. */
|
|
|
|
event_location_up
|
|
string_to_explicit_location (const char **argp,
|
|
const struct language_defn *language,
|
|
explicit_completion_info *completion_info)
|
|
{
|
|
event_location_up location;
|
|
|
|
/* It is assumed that input beginning with '-' and a non-digit
|
|
character is an explicit location. "-p" is reserved, though,
|
|
for probe locations. */
|
|
if (argp == NULL
|
|
|| *argp == NULL
|
|
|| *argp[0] != '-'
|
|
|| !isalpha ((*argp)[1])
|
|
|| ((*argp)[0] == '-' && (*argp)[1] == 'p'))
|
|
return NULL;
|
|
|
|
location = new_explicit_location (NULL);
|
|
|
|
/* Process option/argument pairs. dprintf_command
|
|
requires that processing stop on ','. */
|
|
while ((*argp)[0] != '\0' && (*argp)[0] != ',')
|
|
{
|
|
int len;
|
|
const char *start;
|
|
|
|
/* Clear these on each iteration, since they should be filled
|
|
with info about the last option. */
|
|
if (completion_info != NULL)
|
|
{
|
|
completion_info->quoted_arg_start = NULL;
|
|
completion_info->quoted_arg_end = NULL;
|
|
}
|
|
|
|
/* If *ARGP starts with a keyword, stop processing
|
|
options. */
|
|
if (linespec_lexer_lex_keyword (*argp) != NULL)
|
|
break;
|
|
|
|
/* Mark the start of the string in case we need to rewind. */
|
|
start = *argp;
|
|
|
|
if (completion_info != NULL)
|
|
completion_info->last_option = start;
|
|
|
|
/* Get the option string. */
|
|
gdb::unique_xmalloc_ptr<char> opt
|
|
= explicit_location_lex_one (argp, language, NULL);
|
|
|
|
/* Use the length of the option to allow abbreviations. */
|
|
len = strlen (opt.get ());
|
|
|
|
/* Get the argument string. */
|
|
*argp = skip_spaces (*argp);
|
|
|
|
/* All options have a required argument. Checking for this
|
|
required argument is deferred until later. */
|
|
gdb::unique_xmalloc_ptr<char> oarg;
|
|
/* True if we have an argument. This is required because we'll
|
|
move from OARG before checking whether we have an
|
|
argument. */
|
|
bool have_oarg = false;
|
|
|
|
/* Convenience to consistently set both OARG/HAVE_OARG from
|
|
ARG. */
|
|
auto set_oarg = [&] (gdb::unique_xmalloc_ptr<char> arg)
|
|
{
|
|
oarg = std::move (arg);
|
|
have_oarg = oarg != NULL;
|
|
};
|
|
|
|
if (strncmp (opt.get (), "-source", len) == 0)
|
|
{
|
|
set_oarg (explicit_location_lex_one (argp, language,
|
|
completion_info));
|
|
EL_EXPLICIT (location)->source_filename = oarg.release ();
|
|
}
|
|
else if (strncmp (opt.get (), "-function", len) == 0)
|
|
{
|
|
set_oarg (explicit_location_lex_one_function (argp, language,
|
|
completion_info));
|
|
EL_EXPLICIT (location)->function_name = oarg.release ();
|
|
}
|
|
else if (strncmp (opt.get (), "-line", len) == 0)
|
|
{
|
|
set_oarg (explicit_location_lex_one (argp, language, NULL));
|
|
*argp = skip_spaces (*argp);
|
|
if (have_oarg)
|
|
{
|
|
EL_EXPLICIT (location)->line_offset
|
|
= linespec_parse_line_offset (oarg.get ());
|
|
continue;
|
|
}
|
|
}
|
|
else if (strncmp (opt.get (), "-label", len) == 0)
|
|
{
|
|
set_oarg (explicit_location_lex_one (argp, language, completion_info));
|
|
EL_EXPLICIT (location)->label_name = oarg.release ();
|
|
}
|
|
/* Only emit an "invalid argument" error for options
|
|
that look like option strings. */
|
|
else if (opt.get ()[0] == '-' && !isdigit (opt.get ()[1]))
|
|
{
|
|
if (completion_info == NULL)
|
|
error (_("invalid explicit location argument, \"%s\""), opt.get ());
|
|
}
|
|
else
|
|
{
|
|
/* End of the explicit location specification.
|
|
Stop parsing and return whatever explicit location was
|
|
parsed. */
|
|
*argp = start;
|
|
return location;
|
|
}
|
|
|
|
*argp = skip_spaces (*argp);
|
|
|
|
/* It's a little lame to error after the fact, but in this
|
|
case, it provides a much better user experience to issue
|
|
the "invalid argument" error before any missing
|
|
argument error. */
|
|
if (!have_oarg && completion_info == NULL)
|
|
error (_("missing argument for \"%s\""), opt.get ());
|
|
}
|
|
|
|
/* One special error check: If a source filename was given
|
|
without offset, function, or label, issue an error. */
|
|
if (EL_EXPLICIT (location)->source_filename != NULL
|
|
&& EL_EXPLICIT (location)->function_name == NULL
|
|
&& EL_EXPLICIT (location)->label_name == NULL
|
|
&& (EL_EXPLICIT (location)->line_offset.sign == LINE_OFFSET_UNKNOWN)
|
|
&& completion_info == NULL)
|
|
{
|
|
error (_("Source filename requires function, label, or "
|
|
"line offset."));
|
|
}
|
|
|
|
return location;
|
|
}
|
|
|
|
/* See description in location.h. */
|
|
|
|
event_location_up
|
|
string_to_event_location_basic (char **stringp,
|
|
const struct language_defn *language)
|
|
{
|
|
event_location_up location;
|
|
const char *cs;
|
|
|
|
/* Try the input as a probe spec. */
|
|
cs = *stringp;
|
|
if (cs != NULL && probe_linespec_to_ops (&cs) != NULL)
|
|
{
|
|
location = new_probe_location (*stringp);
|
|
*stringp += strlen (*stringp);
|
|
}
|
|
else
|
|
{
|
|
/* Try an address location. */
|
|
if (*stringp != NULL && **stringp == '*')
|
|
{
|
|
const char *arg, *orig;
|
|
CORE_ADDR addr;
|
|
|
|
orig = arg = *stringp;
|
|
addr = linespec_expression_to_pc (&arg);
|
|
location = new_address_location (addr, orig, arg - orig);
|
|
*stringp += arg - orig;
|
|
}
|
|
else
|
|
{
|
|
/* Everything else is a linespec. */
|
|
location = new_linespec_location (stringp);
|
|
}
|
|
}
|
|
|
|
return location;
|
|
}
|
|
|
|
/* See description in location.h. */
|
|
|
|
event_location_up
|
|
string_to_event_location (char **stringp,
|
|
const struct language_defn *language)
|
|
{
|
|
const char *arg, *orig;
|
|
|
|
/* Try an explicit location. */
|
|
orig = arg = *stringp;
|
|
event_location_up location = string_to_explicit_location (&arg, language, NULL);
|
|
if (location != NULL)
|
|
{
|
|
/* It was a valid explicit location. Advance STRINGP to
|
|
the end of input. */
|
|
*stringp += arg - orig;
|
|
}
|
|
else
|
|
{
|
|
/* Everything else is a "basic" linespec, address, or probe
|
|
location. */
|
|
location = string_to_event_location_basic (stringp, language);
|
|
}
|
|
|
|
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;
|
|
|
|
case ADDRESS_LOCATION:
|
|
return 0;
|
|
|
|
case EXPLICIT_LOCATION:
|
|
return (EL_EXPLICIT (location) == NULL
|
|
|| (EL_EXPLICIT (location)->source_filename == NULL
|
|
&& EL_EXPLICIT (location)->function_name == NULL
|
|
&& EL_EXPLICIT (location)->label_name == NULL
|
|
&& (EL_EXPLICIT (location)->line_offset.sign
|
|
== LINE_OFFSET_UNKNOWN)));
|
|
|
|
case PROBE_LOCATION:
|
|
return EL_PROBE (location) == NULL;
|
|
|
|
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);
|
|
}
|