File: td_thr_validate.c

package info (click to toggle)
glibc 2.24-11+deb9u4
  • links: PTS, VCS
  • area: main
  • in suites: stretch, stretch-proposed-updates
  • size: 225,852 kB
  • sloc: ansic: 996,505; asm: 261,827; sh: 10,484; makefile: 9,856; cpp: 4,169; python: 3,971; perl: 2,254; awk: 1,753; pascal: 1,521; yacc: 291; sed: 80
file content (84 lines) | stat: -rw-r--r-- 2,343 bytes parent folder | download | duplicates (4)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
/* Validate a thread handle.
   Copyright (C) 1999-2016 Free Software Foundation, Inc.
   This file is part of the GNU C Library.
   Contributed by Ulrich Drepper <drepper@redhat.com>, 1999.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library 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
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, see
   <http://www.gnu.org/licenses/>.  */

#include "thread_dbP.h"
#include <stdbool.h>

static td_err_e
check_thread_list (const td_thrhandle_t *th, psaddr_t head, bool *uninit)
{
  td_err_e err;
  psaddr_t next, ofs;

  err = DB_GET_FIELD (next, th->th_ta_p, head, list_t, next, 0);
  if (err == TD_OK)
    {
      if (next == 0)
	{
	  *uninit = true;
	  return TD_NOTHR;
	}
      err = DB_GET_FIELD_ADDRESS (ofs, th->th_ta_p, 0, pthread, list, 0);
    }

  while (err == TD_OK)
    {
      if (next == head)
	return TD_NOTHR;

      if (next - (ofs - (psaddr_t) 0) == th->th_unique)
	return TD_OK;

      err = DB_GET_FIELD (next, th->th_ta_p, next, list_t, next, 0);
    }

  return err;
}


td_err_e
td_thr_validate (const td_thrhandle_t *th)
{
  td_err_e err;
  psaddr_t list;

  LOG ("td_thr_validate");

  /* First check the list with threads using user allocated stacks.  */
  bool uninit = false;
  err = DB_GET_SYMBOL (list, th->th_ta_p, __stack_user);
  if (err == TD_OK)
    err = check_thread_list (th, list, &uninit);

  /* If our thread is not on this list search the list with stack
     using implementation allocated stacks.  */
  if (err == TD_NOTHR)
    {
      err = DB_GET_SYMBOL (list, th->th_ta_p, stack_used);
      if (err == TD_OK)
	err = check_thread_list (th, list, &uninit);

      if (err == TD_NOTHR && uninit && th->th_unique == 0)
	/* __pthread_initialize_minimal has not run yet.
	   There is only the special case thread handle.  */
	err = TD_OK;
    }

  return err;
}