td_err_e
td_ta_new (struct ps_prochandle *ps, td_thragent_t **ta)
{
psaddr_t versaddr;
char versbuf[sizeof (VERSION)];
LOG ("td_ta_new");
/* Check whether the versions match. */
if (td_lookup (ps, SYM_nptl_version, &versaddr) != PS_OK)
return TD_NOLIBTHREAD;
if (ps_pdread (ps, versaddr, versbuf, sizeof (versbuf)) != PS_OK)
return TD_ERR;
if (memcmp (versbuf, VERSION, sizeof VERSION) != 0)
/* Not the right version. */
return TD_VERSION;
/* Fill in the appropriate information. */
*ta = (td_thragent_t *) calloc (1, 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;
/* Now add the new agent descriptor to the list. */
list_add (&(*ta)->list, &__td_agent_list);
return TD_OK;
}
td_err_e
_td_check_sizeof (td_thragent_t *ta, uint32_t *sizep, int sizep_name)
{
if (*sizep == 0)
{
psaddr_t descptr;
ps_err_e err = td_lookup (ta->ph, sizep_name, &descptr);
if (err == PS_NOSYM)
return TD_NOCAPAB;
if (err == PS_OK)
err = ps_pdread (ta->ph, descptr, sizep, sizeof *sizep);
if (err != PS_OK)
return TD_ERR;
if (*sizep & 0xff000000U)
*sizep = bswap_32 (*sizep);
}
return TD_OK;
}
td_err_e
_td_locate_field (td_thragent_t *ta,
db_desc_t desc, int descriptor_name,
psaddr_t idx, psaddr_t *address)
{
uint32_t elemsize;
if (DB_DESC_SIZE (desc) == 0)
{
/* Read the information about this field from the inferior. */
psaddr_t descptr;
ps_err_e err = td_lookup (ta->ph, descriptor_name, &descptr);
if (err == PS_NOSYM)
return TD_NOCAPAB;
if (err == PS_OK)
err = ps_pdread (ta->ph, descptr, desc, DB_SIZEOF_DESC);
if (err != PS_OK)
return TD_ERR;
if (DB_DESC_SIZE (desc) == 0)
return TD_DBERR;
if (DB_DESC_SIZE (desc) & 0xff000000U)
{
/* Byte-swap these words, though we leave the size word
in native order as the handy way to distinguish. */
DB_DESC_OFFSET (desc) = bswap_32 (DB_DESC_OFFSET (desc));
DB_DESC_NELEM (desc) = bswap_32 (DB_DESC_NELEM (desc));
}
}
if (idx != 0 && DB_DESC_NELEM (desc) != 0
&& idx - (psaddr_t) 0 > DB_DESC_NELEM (desc))
/* This is an internal indicator to callers with nonzero IDX
that the IDX value is too big. */
return TD_NOAPLIC;
elemsize = DB_DESC_SIZE (desc);
if (elemsize & 0xff000000U)
elemsize = bswap_32 (elemsize);
*address += (int32_t) DB_DESC_OFFSET (desc);
*address += (elemsize / 8 * (idx - (psaddr_t) 0));
return TD_OK;
}
td_err_e
td_ta_get_nthreads (const td_thragent_t *ta, int *np)
{
psaddr_t addr;
LOG ("td_ta_get_nthreads");
/* Test whether the TA parameter is ok. */
if (! ta_ok (ta))
return TD_BADTA;
/* Access the variable `__pthread_handles_num'. */
if (td_lookup (ta->ph, PTHREAD_HANDLES_NUM, &addr) != PS_OK)
return TD_ERR; /* XXX Other error value? */
if (ps_pdread (ta->ph, addr, np, sizeof (int)) != PS_OK)
return TD_ERR; /* XXX Other error value? */
return TD_OK;
}
td_err_e
td_ta_new (struct ps_prochandle *ps, td_thragent_t **ta)
{
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_return:
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;
else
{
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;
else
{
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);
else
{
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;
}
