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/* TID parsing for GDB, the GNU debugger.
Copyright (C) 2015-2016 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 TID_PARSE_H
#define TID_PARSE_H
#include "cli/cli-utils.h"
struct thread_info;
/* Issue an invalid thread ID error, pointing at STRING, the invalid
ID. */
extern void ATTRIBUTE_NORETURN invalid_thread_id_error (const char *string);
/* Parse TIDSTR as a per-inferior thread ID, in either INF_NUM.THR_NUM
or THR_NUM form. In the latter case, the missing INF_NUM is filled
in from the current inferior. If ENDPTR is not NULL,
parse_thread_id stores the address of the first character after the
thread ID. Either a valid thread is returned, or an error is
thrown. */
struct thread_info *parse_thread_id (const char *tidstr, const char **end);
/* The possible states of the tid range parser's state machine. */
enum tid_range_state
{
/* Parsing the inferior number. */
TID_RANGE_STATE_INFERIOR,
/* Parsing the thread number or thread number range. */
TID_RANGE_STATE_THREAD_RANGE,
/* Parsing a star wildcard thread range. E.g., "1.*". */
TID_RANGE_STATE_STAR_RANGE,
};
/* An object of this type is passed to tid_range_parser_get_tid. It
must be initialized by calling tid_range_parser_init. This type is
defined here so that it can be stack-allocated, but all members
should be treated as opaque. */
struct tid_range_parser
{
/* What sub-component are we expecting. */
enum tid_range_state state;
/* The string being parsed. When parsing has finished, this points
past the last parsed token. */
const char *string;
/* The range parser state when we're parsing the thread number
sub-component. */
struct get_number_or_range_state range_parser;
/* Last inferior number returned. */
int inf_num;
/* True if the TID last parsed was explicitly inferior-qualified.
IOW, whether the spec specified an inferior number
explicitly. */
int qualified;
/* The inferior number to assume if the TID is not qualified. */
int default_inferior;
};
/* Initialize a tid_range_parser for use with
tid_range_parser_get_tid. TIDLIST is the string to be parsed.
DEFAULT_INFERIOR is the inferior number to assume if a
non-qualified thread ID is found. */
extern void tid_range_parser_init (struct tid_range_parser *parser,
const char *tidlist,
int default_inferior);
/* Parse a thread ID or a thread range list.
A range will be of the form
<inferior_num>.<thread_number1>-<thread_number2>
and will represent all the threads of inferior INFERIOR_NUM with
number between THREAD_NUMBER1 and THREAD_NUMBER2, inclusive.
<inferior_num> can also be omitted, as in
<thread_number1>-<thread_number2>
in which case GDB infers the inferior number from the default
passed to the tid_range_parser_init function.
This function is designed to be called iteratively. While
processing a thread ID range list, at each call it will return (in
the INF_NUM and THR_NUM output parameters) the next thread ID in
the range (irrespective of whether the thread actually exists).
At the beginning of parsing a thread range, the char pointer
PARSER->string will be advanced past <thread_number1> and left
pointing at the '-' token. Subsequent calls will not advance the
pointer until the range is completed. The call that completes the
range will advance the pointer past <thread_number2>.
This function advances through the input string for as long you
call it. Once the end of the input string is reached, a call to
tid_range_parser_finished returns false (see below).
E.g., with list: "1.2 3.4-6":
1st call: *INF_NUM=1; *THR_NUM=2 (finished==0)
2nd call: *INF_NUM=3; *THR_NUM=4 (finished==0)
3rd call: *INF_NUM=3; *THR_NUM=5 (finished==0)
4th call: *INF_NUM=3; *THR_NUM=6 (finished==1)
Returns true if parsed a thread/range successfully, false
otherwise. */
extern int tid_range_parser_get_tid (struct tid_range_parser *parser,
int *inf_num, int *thr_num);
/* Like tid_range_parser_get_tid, but return a thread ID range per
call, rather then a single thread ID.
If the next element in the list is a single thread ID, then
*THR_START and *THR_END are set to the same value.
E.g.,. with list: "1.2 3.4-6"
1st call: *INF_NUM=1; *THR_START=2; *THR_END=2 (finished==0)
2nd call: *INF_NUM=3; *THR_START=4; *THR_END=6 (finished==1)
Returns true if parsed a thread/range successfully, false
otherwise. */
extern int tid_range_parser_get_tid_range (struct tid_range_parser *parser,
int *inf_num,
int *thr_start, int *thr_end);
/* Returns non-zero if processing a star wildcard (e.g., "1.*")
range. */
extern int tid_range_parser_star_range (struct tid_range_parser *parser);
/* Returns non-zero if parsing has completed. */
extern int tid_range_parser_finished (struct tid_range_parser *parser);
/* Return the string being parsed. When parsing has finished, this
points past the last parsed token. */
const char *tid_range_parser_string (struct tid_range_parser *parser);
/* When parsing a range, advance past the final token in the range. */
extern void tid_range_parser_skip (struct tid_range_parser *parser);
/* True if the TID last parsed was explicitly inferior-qualified.
IOW, whether the spec specified an inferior number explicitly. */
extern int tid_range_parser_qualified (struct tid_range_parser *parser);
/* Accept a string-form list of thread IDs such as is accepted by
tid_range_parser_get_tid. Return true if the INF_NUM.THR.NUM
thread is in the list. DEFAULT_INFERIOR is the inferior number to
assume if a non-qualified thread ID is found in the list.
By definition, an empty list includes all threads. This is to be
interpreted as typing a command such as "info threads" with no
arguments. */
extern int tid_is_in_list (const char *list, int default_inferior,
int inf_num, int thr_num);
#endif /* TID_PARSE_H */
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