td_thr_validate.c 2.4 KB

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  1. /* Validate a thread handle.
  2. Copyright (C) 1999, 2001, 2002 Free Software Foundation, Inc.
  3. This file is part of the GNU C Library.
  4. Contributed by Ulrich Drepper <drepper@cygnus.com>, 1999.
  5. The GNU C Library is free software; you can redistribute it and/or
  6. modify it under the terms of the GNU Lesser General Public
  7. License as published by the Free Software Foundation; either
  8. version 2.1 of the License, or (at your option) any later version.
  9. The GNU C Library is distributed in the hope that it will be useful,
  10. but WITHOUT ANY WARRANTY; without even the implied warranty of
  11. MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  12. Lesser General Public License for more details.
  13. You should have received a copy of the GNU Lesser General Public
  14. License along with the GNU C Library; if not, write to the Free
  15. Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  16. 02111-1307 USA. */
  17. #include "thread_dbP.h"
  18. #include <linuxthreads/internals.h>
  19. td_err_e
  20. td_thr_validate (const td_thrhandle_t *th)
  21. {
  22. struct pthread_handle_struct *handles = th->th_ta_p->handles;
  23. int pthread_threads_max = th->th_ta_p->pthread_threads_max;
  24. int cnt;
  25. struct pthread_handle_struct phc;
  26. LOG ("td_thr_validate");
  27. /* A special case: if the program just starts up the handle is
  28. NULL. */
  29. if (th->th_unique == NULL)
  30. {
  31. /* Read the first handle. If the pointer to the thread
  32. descriptor is not NULL this is an error. */
  33. if (ps_pdread (th->th_ta_p->ph, handles, &phc,
  34. sizeof (struct pthread_handle_struct)) != PS_OK)
  35. return TD_ERR; /* XXX Other error value? */
  36. return phc.h_descr == NULL ? TD_OK : TD_NOTHR;
  37. }
  38. /* Now get all descriptors, one after the other. */
  39. for (cnt = 0; cnt < pthread_threads_max; ++cnt, ++handles)
  40. {
  41. if (ps_pdread (th->th_ta_p->ph, handles, &phc,
  42. sizeof (struct pthread_handle_struct)) != PS_OK)
  43. return TD_ERR; /* XXX Other error value? */
  44. if (phc.h_descr != NULL && phc.h_descr == th->th_unique)
  45. {
  46. struct _pthread_descr_struct pds;
  47. if (ps_pdread (th->th_ta_p->ph, phc.h_descr, &pds,
  48. th->th_ta_p->sizeof_descr) != PS_OK)
  49. return TD_ERR; /* XXX Other error value? */
  50. /* XXX There should be another test using the TID but this is
  51. currently not available. */
  52. return pds.p_terminated != 0 ? TD_NOTHR : TD_OK;
  53. }
  54. }
  55. return TD_ERR;
  56. }