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/* TID parsing for GDB, the GNU debugger.
Copyright (C) 2015-2024 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. */
[[noreturn]] extern void 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);
/* Return true if TIDSTR is pointing to a string that looks like a
thread-id. This doesn't mean that TIDSTR identifies a valid thread, but
the string does at least look like a valid thread-id. If END is not
NULL, parse_thread_id stores the address of the first character after
the thread-id into *END. */
bool is_thread_id (const char *tidstr, const char **end);
/* 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 constructor or to the last call to the init
function. */
class tid_range_parser
{
public:
/* Default construction. Must call init before calling get_*. */
tid_range_parser () {}
/* Calls init automatically. See init for description of
parameters. */
tid_range_parser (const char *tidlist, int default_inferior);
/* Reinitialize a tid_range_parser. TIDLIST is the string to be
parsed. DEFAULT_INFERIOR is the inferior number to assume if a
non-qualified thread ID is found. */
void init (const char *tidlist, int default_inferior);
/* Parse a thread ID or a thread range list.
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->m_cur_tok 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
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 a thread/range is parsed successfully, false
otherwise. */
bool get_tid (int *inf_num, int *thr_num);
/* Like 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. */
bool get_tid_range (int *inf_num, int *thr_start, int *thr_end);
/* Returns true if processing a star wildcard (e.g., "1.*")
range. */
bool in_star_range () const;
/* Returns true if processing a thread range (e.g., 1.2-3). */
bool in_thread_range () const;
/* Returns true if parsing has completed. */
bool finished () const;
/* Return the current token being parsed. When parsing has
finished, this points past the last parsed token. */
const char *cur_tok () const;
/* When parsing a range, advance past the final token in the
range. */
void skip_range ();
/* True if the TID last parsed was explicitly inferior-qualified.
IOW, whether the spec specified an inferior number
explicitly. */
bool tid_is_qualified () const;
private:
/* No need for these. They are intentionally not defined anywhere. */
tid_range_parser (const tid_range_parser &);
tid_range_parser &operator= (const tid_range_parser &);
bool get_tid_or_range (int *inf_num, int *thr_start, int *thr_end);
/* The possible states of the tid range parser's state machine,
indicating what sub-component are we expecting. */
enum
{
/* Parsing the inferior number. */
STATE_INFERIOR,
/* Parsing the thread number or thread number range. */
STATE_THREAD_RANGE,
/* Parsing a star wildcard thread range. E.g., "1.*". */
STATE_STAR_RANGE,
} m_state;
/* The string being parsed. When parsing has finished, this points
past the last parsed token. */
const char *m_cur_tok;
/* The range parser state when we're parsing the thread number
sub-component. */
number_or_range_parser m_range_parser;
/* Last inferior number returned. */
int m_inf_num;
/* True if the TID last parsed was explicitly inferior-qualified.
IOW, whether the spec specified an inferior number
explicitly. */
bool m_qualified;
/* The inferior number to assume if the TID is not qualified. */
int m_default_inferior;
};
/* Accept a string-form list of thread IDs such as is accepted by
tid_range_parser. 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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