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glibc  2.9
Functions | Variables
td_ta_new.c File Reference
#include <stddef.h>
#include <stdlib.h>
#include <string.h>
#include <version.h>
#include "thread_dbP.h"

Go to the source code of this file.


td_err_e td_ta_new (struct ps_prochandle *ps, td_thragent_t **ta)


struct agent_list__td_agent_list

Function Documentation

td_err_e td_ta_new ( struct ps_prochandle *  ps,
td_thragent_t **  ta 

Definition at line 35 of file td_ta_new.c.

  psaddr_t addr;
  psaddr_t versaddr;
  char versbuf[sizeof (VERSION)];
  struct agent_list *elemp;

  LOG ("td_ta_new");

  /* Get the global event mask.  This is one of the variables which
     are new in the thread library to enable debugging.  If it is
     not available we cannot debug.  */
  if (td_lookup (ps, PTHREAD_THREADS_EVENTS, &addr) != PS_OK)
    return TD_NOLIBTHREAD;

  /* Check whether the versions match.  */
  if (td_lookup (ps, LINUXTHREADS_VERSION, &versaddr) != PS_OK)
    return TD_VERSION;
  if (ps_pdread (ps, versaddr, versbuf, sizeof (versbuf)) != PS_OK)
    return TD_ERR;

  versbuf[sizeof (versbuf) - 1] = '\0';
  if (strcmp (versbuf, VERSION) != 0)
    /* Not the right version.  */
    return TD_VERSION;

  /* Fill in the appropriate information.  */
  *ta = (td_thragent_t *) malloc (sizeof (td_thragent_t));
  if (*ta == NULL)
    return TD_MALLOC;

  /* Store the proc handle which we will pass to the callback functions
     back into the debugger.  */
  (*ta)->ph = ps;

  /* Remember the address.  */
  (*ta)->pthread_threads_eventsp = (td_thr_events_t *) addr;

  /* Get the pointer to the variable pointing to the thread descriptor
     with the last event.  */
  if (td_lookup (ps, PTHREAD_LAST_EVENT, &(*ta)->pthread_last_event) != PS_OK)
      free (*ta);
      return TD_ERR;

  /* Get the pointer to the variable containing the number of active
     threads.  */
  if (td_lookup (ps, PTHREAD_HANDLES_NUM, &(*ta)->pthread_handles_num)
      != PS_OK)
    goto free_return;

  /* See whether the library contains the necessary symbols.  */
  if (td_lookup (ps, PTHREAD_HANDLES, &addr) != PS_OK)
    goto free_return;

  (*ta)->handles = (struct pthread_handle_struct *) addr;

  if (td_lookup (ps, PTHREAD_KEYS, &addr) != PS_OK)
    goto free_return;

  /* Cast to the right type.  */
  (*ta)->keys = (struct pthread_key_struct *) addr;

  /* Find out about the maximum number of threads.  Old implementations
     don't provide this information.  In this case we assume that the
     debug  library is compiled with the same values.  */
  if (td_lookup (ps, LINUXTHREADS_PTHREAD_THREADS_MAX, &addr) != PS_OK)
    (*ta)->pthread_threads_max = PTHREAD_THREADS_MAX;
      if (ps_pdread (ps, addr, &(*ta)->pthread_threads_max, sizeof (int))
         != PS_OK)
       goto free_return;

  /* Similar for the maximum number of thread local data keys.  */
  if (td_lookup (ps, LINUXTHREADS_PTHREAD_KEYS_MAX, &addr) != PS_OK)
    (*ta)->pthread_keys_max = PTHREAD_KEYS_MAX;
      if (ps_pdread (ps, addr, &(*ta)->pthread_keys_max, sizeof (int))
         != PS_OK)
       goto free_return;

  /* And for the size of the second level arrays for the keys.  */
  if (td_lookup (ps, LINUXTHREADS_PTHREAD_SIZEOF_DESCR, &addr) != PS_OK)
    (*ta)->sizeof_descr = sizeof (struct _pthread_descr_struct);
      if (ps_pdread (ps, addr, &(*ta)->sizeof_descr, sizeof (int)) != PS_OK)
       goto free_return;
      /* Don't let bogons in the inferior make us mess ourselves.  */
      if ((*ta)->sizeof_descr > sizeof (struct _pthread_descr_struct))
       (*ta)->sizeof_descr = sizeof (struct _pthread_descr_struct);

  /* Now add the new agent descriptor to the list.  */
  elemp = (struct agent_list *) malloc (sizeof (struct agent_list));
  if (elemp == NULL)
      /* Argh, now that everything else worked...  */
      free (*ta);
      return TD_MALLOC;

  /* We don't care for thread-safety here.  */
  elemp->ta = *ta;
  elemp->next = __td_agent_list;
  __td_agent_list = elemp;

  return TD_OK;

Variable Documentation

Definition at line 31 of file td_ta_new.c.