/* Data structures and API for event locations in GDB.
- Copyright (C) 2013-2015 Free Software Foundation, Inc.
+ Copyright (C) 2013-2016 Free Software Foundation, Inc.
This file is part of GDB.
{
/* The type of this breakpoint specification. */
enum event_location_type type;
-#define EL_TYPE(PTR) (PTR)->type
+#define EL_TYPE(P) (P)->type
union
{
This representation is used by both "normal" linespecs and
probes. */
char *addr_string;
-#define EL_LINESPEC(PTR) ((PTR)->u.addr_string)
+#define EL_LINESPEC(P) ((P)->u.addr_string)
+#define EL_PROBE(P) ((P)->u.addr_string)
+
+ /* An address in the inferior. */
+ CORE_ADDR address;
+#define EL_ADDRESS(P) (P)->u.address
+
+ /* An explicit location. */
+ struct explicit_location explicit_loc;
+#define EL_EXPLICIT(P) (&((P)->u.explicit_loc))
} 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)
+#define EL_STRING(P) ((P)->as_string)
};
/* See description in location.h. */
/* See description in location.h. */
+void
+initialize_explicit_location (struct explicit_location *explicit_loc)
+{
+ memset (explicit_loc, 0, sizeof (struct explicit_location));
+ explicit_loc->line_offset.sign = LINE_OFFSET_UNKNOWN;
+}
+
+/* See description in location.h. */
+
struct event_location *
new_linespec_location (char **linespec)
{
/* See description in location.h. */
+struct event_location *
+new_address_location (CORE_ADDR addr, const char *addr_string,
+ int addr_string_len)
+{
+ struct event_location *location;
+
+ location = XCNEW (struct event_location);
+ EL_TYPE (location) = ADDRESS_LOCATION;
+ EL_ADDRESS (location) = addr;
+ if (addr_string != NULL)
+ EL_STRING (location) = xstrndup (addr_string, addr_string_len);
+ return location;
+}
+
+/* See description in location.h. */
+
+CORE_ADDR
+get_address_location (const struct event_location *location)
+{
+ gdb_assert (EL_TYPE (location) == ADDRESS_LOCATION);
+ return EL_ADDRESS (location);
+}
+
+/* See description in location.h. */
+
+const char *
+get_address_string_location (const struct event_location *location)
+{
+ gdb_assert (EL_TYPE (location) == ADDRESS_LOCATION);
+ return EL_STRING (location);
+}
+
+/* See description in location.h. */
+
+struct event_location *
+new_probe_location (const char *probe)
+{
+ struct event_location *location;
+
+ location = XCNEW (struct event_location);
+ EL_TYPE (location) = PROBE_LOCATION;
+ if (probe != NULL)
+ EL_PROBE (location) = xstrdup (probe);
+ return location;
+}
+
+/* See description in location.h. */
+
+const char *
+get_probe_location (const struct event_location *location)
+{
+ gdb_assert (EL_TYPE (location) == PROBE_LOCATION);
+ return EL_PROBE (location);
+}
+
+/* See description in location.h. */
+
+struct event_location *
+new_explicit_location (const struct explicit_location *explicit_loc)
+{
+ struct event_location tmp;
+
+ memset (&tmp, 0, sizeof (struct event_location));
+ EL_TYPE (&tmp) = EXPLICIT_LOCATION;
+ initialize_explicit_location (EL_EXPLICIT (&tmp));
+ if (explicit_loc != NULL)
+ {
+ if (explicit_loc->source_filename != NULL)
+ {
+ EL_EXPLICIT (&tmp)->source_filename
+ = explicit_loc->source_filename;
+ }
+
+ if (explicit_loc->function_name != NULL)
+ EL_EXPLICIT (&tmp)->function_name
+ = explicit_loc->function_name;
+
+ if (explicit_loc->label_name != NULL)
+ EL_EXPLICIT (&tmp)->label_name = explicit_loc->label_name;
+
+ if (explicit_loc->line_offset.sign != LINE_OFFSET_UNKNOWN)
+ EL_EXPLICIT (&tmp)->line_offset = explicit_loc->line_offset;
+ }
+
+ return copy_event_location (&tmp);
+}
+
+/* See description in location.h. */
+
+struct explicit_location *
+get_explicit_location (struct event_location *location)
+{
+ gdb_assert (EL_TYPE (location) == EXPLICIT_LOCATION);
+ return EL_EXPLICIT (location);
+}
+
+/* See description in location.h. */
+
+const struct explicit_location *
+get_explicit_location_const (const struct event_location *location)
+{
+ gdb_assert (EL_TYPE (location) == EXPLICIT_LOCATION);
+ return EL_EXPLICIT (location);
+}
+
+/* This convenience function returns a malloc'd string which
+ represents the location in EXPLICIT_LOC.
+
+ AS_LINESPEC is non-zero if this string should be a linespec.
+ Otherwise it will be output in explicit form. */
+
+static char *
+explicit_to_string_internal (int as_linespec,
+ const struct explicit_location *explicit_loc)
+{
+ struct ui_file *buf;
+ char space, *result;
+ int need_space = 0;
+ struct cleanup *cleanup;
+
+ space = as_linespec ? ':' : ' ';
+ buf = mem_fileopen ();
+ cleanup = make_cleanup_ui_file_delete (buf);
+
+ if (explicit_loc->source_filename != NULL)
+ {
+ if (!as_linespec)
+ fputs_unfiltered ("-source ", buf);
+ fputs_unfiltered (explicit_loc->source_filename, buf);
+ need_space = 1;
+ }
+
+ if (explicit_loc->function_name != NULL)
+ {
+ if (need_space)
+ fputc_unfiltered (space, buf);
+ if (!as_linespec)
+ fputs_unfiltered ("-function ", buf);
+ fputs_unfiltered (explicit_loc->function_name, buf);
+ need_space = 1;
+ }
+
+ if (explicit_loc->label_name != NULL)
+ {
+ if (need_space)
+ fputc_unfiltered (space, buf);
+ if (!as_linespec)
+ fputs_unfiltered ("-label ", buf);
+ fputs_unfiltered (explicit_loc->label_name, buf);
+ need_space = 1;
+ }
+
+ if (explicit_loc->line_offset.sign != LINE_OFFSET_UNKNOWN)
+ {
+ if (need_space)
+ fputc_unfiltered (space, buf);
+ if (!as_linespec)
+ fputs_unfiltered ("-line ", buf);
+ fprintf_filtered (buf, "%s%d",
+ (explicit_loc->line_offset.sign == LINE_OFFSET_NONE ? ""
+ : (explicit_loc->line_offset.sign
+ == LINE_OFFSET_PLUS ? "+" : "-")),
+ explicit_loc->line_offset.offset);
+ }
+
+ result = ui_file_xstrdup (buf, NULL);
+ do_cleanups (cleanup);
+ return result;
+}
+
+/* See description in location.h. */
+
+char *
+explicit_location_to_string (const struct explicit_location *explicit_loc)
+{
+ return explicit_to_string_internal (0, explicit_loc);
+}
+
+/* See description in location.h. */
+
+char *
+explicit_location_to_linespec (const struct explicit_location *explicit_loc)
+{
+ return explicit_to_string_internal (1, explicit_loc);
+}
+
+/* See description in location.h. */
+
struct event_location *
copy_event_location (const struct event_location *src)
{
EL_LINESPEC (dst) = xstrdup (EL_LINESPEC (src));
break;
+ case ADDRESS_LOCATION:
+ EL_ADDRESS (dst) = EL_ADDRESS (src);
+ break;
+
+ case EXPLICIT_LOCATION:
+ if (EL_EXPLICIT (src)->source_filename != NULL)
+ EL_EXPLICIT (dst)->source_filename
+ = xstrdup (EL_EXPLICIT (src)->source_filename);
+
+ if (EL_EXPLICIT (src)->function_name != NULL)
+ EL_EXPLICIT (dst)->function_name
+ = xstrdup (EL_EXPLICIT (src)->function_name);
+
+ if (EL_EXPLICIT (src)->label_name != NULL)
+ EL_EXPLICIT (dst)->label_name = xstrdup (EL_EXPLICIT (src)->label_name);
+
+ EL_EXPLICIT (dst)->line_offset = EL_EXPLICIT (src)->line_offset;
+ break;
+
+
+ case PROBE_LOCATION:
+ if (EL_PROBE (src) != NULL)
+ EL_PROBE (dst) = xstrdup (EL_PROBE (src));
+ break;
+
default:
gdb_assert_not_reached ("unknown event location type");
}
xfree (EL_LINESPEC (location));
break;
+ case ADDRESS_LOCATION:
+ /* Nothing to do. */
+ break;
+
+ case EXPLICIT_LOCATION:
+ xfree (EL_EXPLICIT (location)->source_filename);
+ xfree (EL_EXPLICIT (location)->function_name);
+ xfree (EL_EXPLICIT (location)->label_name);
+ break;
+
+ case PROBE_LOCATION:
+ xfree (EL_PROBE (location));
+ break;
+
default:
gdb_assert_not_reached ("unknown event location type");
}
EL_STRING (location) = xstrdup (EL_LINESPEC (location));
break;
+ case ADDRESS_LOCATION:
+ EL_STRING (location)
+ = xstrprintf ("*%s",
+ core_addr_to_string (EL_ADDRESS (location)));
+ break;
+
+ case EXPLICIT_LOCATION:
+ EL_STRING (location)
+ = explicit_location_to_string (EL_EXPLICIT (location));
+ break;
+
+ case PROBE_LOCATION:
+ EL_STRING (location) = xstrdup (EL_PROBE (location));
+ break;
+
default:
gdb_assert_not_reached ("unknown event location type");
}
return EL_STRING (location);
}
+/* A lexer for explicit locations. This function will advance INP
+ past any strings that it lexes. Returns a malloc'd copy of the
+ lexed string or NULL if no lexing was done. */
+
+static char *
+explicit_location_lex_one (const char **inp,
+ const struct language_defn *language)
+{
+ 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)))
+ {
+ const char *end = find_toplevel_char (start + 1, quote_char);
+
+ if (end == NULL)
+ error (_("Unmatched quote, %s."), start);
+ *inp = end + 1;
+ return savestring (start + 1, *inp - start - 2);
+ }
+ }
+
+ /* If the input starts with '-' or '+', the string ends with the next
+ whitespace or comma. */
+ if (*start == '-' || *start == '+')
+ {
+ while (*inp[0] != '\0' && *inp[0] != ',' && !isspace (*inp[0]))
+ ++(*inp);
+ }
+ else
+ {
+ /* Handle numbers first, stopping at the next whitespace or ','. */
+ while (isdigit (*inp[0]))
+ ++(*inp);
+ if (*inp[0] == '\0' || isspace (*inp[0]) || *inp[0] == ',')
+ return savestring (start, *inp - start);
+
+ /* Otherwise stop at the next occurrence of whitespace, '\0',
+ keyword, or ','. */
+ *inp = start;
+ while ((*inp)[0]
+ && (*inp)[0] != ','
+ && !(isspace ((*inp)[0])
+ || linespec_lexer_lex_keyword (&(*inp)[1])))
+ {
+ /* Special case: C++ operator,. */
+ if (language->la_language == language_cplus
+ && strncmp (*inp, "operator", 8)
+ && (*inp)[9] == ',')
+ (*inp) += 9;
+ ++(*inp);
+ }
+ }
+
+ if (*inp - start > 0)
+ return savestring (start, *inp - start);
+
+ return NULL;
+}
+
+/* See description in location.h. */
+
+struct event_location *
+string_to_explicit_location (const char **argp,
+ const struct language_defn *language,
+ int dont_throw)
+{
+ struct cleanup *cleanup;
+ struct event_location *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 == '\0'
+ || *argp[0] != '-'
+ || !isalpha ((*argp)[1])
+ || ((*argp)[0] == '-' && (*argp)[1] == 'p'))
+ return NULL;
+
+ location = new_explicit_location (NULL);
+ cleanup = make_cleanup_delete_event_location (location);
+
+ /* Process option/argument pairs. dprintf_command
+ requires that processing stop on ','. */
+ while ((*argp)[0] != '\0' && (*argp)[0] != ',')
+ {
+ int len;
+ char *opt, *oarg;
+ const char *start;
+ struct cleanup *opt_cleanup, *oarg_cleanup;
+
+ /* 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;
+
+ /* Get the option string. */
+ opt = explicit_location_lex_one (argp, language);
+ opt_cleanup = make_cleanup (xfree, opt);
+
+ *argp = skip_spaces_const (*argp);
+
+ /* Get the argument string. */
+ oarg = explicit_location_lex_one (argp, language);
+ oarg_cleanup = make_cleanup (xfree, oarg);
+ *argp = skip_spaces_const (*argp);
+
+ /* Use the length of the option to allow abbreviations. */
+ len = strlen (opt);
+
+ /* All options have a required argument. Checking for this required
+ argument is deferred until later. */
+ if (strncmp (opt, "-source", len) == 0)
+ EL_EXPLICIT (location)->source_filename = oarg;
+ else if (strncmp (opt, "-function", len) == 0)
+ EL_EXPLICIT (location)->function_name = oarg;
+ else if (strncmp (opt, "-line", len) == 0)
+ {
+ if (oarg != NULL)
+ {
+ EL_EXPLICIT (location)->line_offset
+ = linespec_parse_line_offset (oarg);
+ do_cleanups (oarg_cleanup);
+ do_cleanups (opt_cleanup);
+ continue;
+ }
+ }
+ else if (strncmp (opt, "-label", len) == 0)
+ EL_EXPLICIT (location)->label_name = oarg;
+ /* Only emit an "invalid argument" error for options
+ that look like option strings. */
+ else if (opt[0] == '-' && !isdigit (opt[1]))
+ {
+ if (!dont_throw)
+ error (_("invalid explicit location argument, \"%s\""), opt);
+ }
+ else
+ {
+ /* End of the explicit location specification.
+ Stop parsing and return whatever explicit location was
+ parsed. */
+ *argp = start;
+ discard_cleanups (oarg_cleanup);
+ do_cleanups (opt_cleanup);
+ discard_cleanups (cleanup);
+ return location;
+ }
+
+ /* 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 (oarg == NULL && !dont_throw)
+ error (_("missing argument for \"%s\""), opt);
+
+ /* The option/argument pair was successfully processed;
+ oarg belongs to the explicit location, and opt should
+ be freed. */
+ discard_cleanups (oarg_cleanup);
+ do_cleanups (opt_cleanup);
+ }
+
+ /* 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)
+ && !dont_throw)
+ {
+ error (_("Source filename requires function, label, or "
+ "line offset."));
+ }
+
+ discard_cleanups (cleanup);
+ return location;
+}
+
+/* See description in location.h. */
+
+struct event_location *
+string_to_event_location_basic (char **stringp,
+ const struct language_defn *language)
+{
+ struct event_location *location;
+ const char *arg, *orig, *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. */
struct event_location *
const struct language_defn *language)
{
struct event_location *location;
+ const char *arg, *orig;
+
+ /* Try an explicit location. */
+ orig = arg = *stringp;
+ location = string_to_explicit_location (&arg, language, 0);
+ 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);
+ }
- location = new_linespec_location (stringp);
return 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");
}
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