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nptl: Move stack list variables into _rtld_global

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Now __thread_gscope_wait (the function behind THREAD_GSCOPE_WAIT,
formerly __wait_lookup_done) can be implemented directly in ld.so,
eliminating the unprotected GL (dl_wait_lookup_done) function
pointer.

Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>
This commit is contained in:
Florian Weimer
2020-11-16 19:33:30 +01:00
parent aac0f62c47
commit 1daccf403b
37 changed files with 243 additions and 184 deletions
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39
nptl_db/td_thr_validate.c
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@ -20,6 +20,41 @@
#include "thread_dbP.h"
#include <stdbool.h>
td_err_e
__td_ta_stack_user (td_thragent_t *ta, psaddr_t *plist)
{
if (__td_ta_rtld_global (ta))
return DB_GET_FIELD_ADDRESS (*plist, ta, ta->ta_addr__rtld_global,
rtld_global, _dl_stack_user, 0);
else
{
if (ta->ta_addr__dl_stack_user == 0
&& td_mod_lookup (ta->ph, NULL, SYM__dl_stack_user,
&ta->ta_addr__dl_stack_user) != PS_OK)
return TD_ERR;
*plist = ta->ta_addr__dl_stack_user;
return TD_OK;
}
}
td_err_e
__td_ta_stack_used (td_thragent_t *ta, psaddr_t *plist)
{
if (__td_ta_rtld_global (ta))
return DB_GET_FIELD_ADDRESS (*plist, ta, ta->ta_addr__rtld_global,
rtld_global, _dl_stack_used, 0);
else
{
if (ta->ta_addr__dl_stack_used == 0
&& td_mod_lookup (ta->ph, NULL, SYM__dl_stack_used,
&ta->ta_addr__dl_stack_used) != PS_OK)
return TD_ERR;
*plist = ta->ta_addr__dl_stack_used;
return TD_OK;
}
}
static td_err_e
check_thread_list (const td_thrhandle_t *th, psaddr_t head, bool *uninit)
{
@ -62,7 +97,7 @@ td_thr_validate (const td_thrhandle_t *th)
/* First check the list with threads using user allocated stacks. */
bool uninit = false;
err = DB_GET_SYMBOL (list, th->th_ta_p, __stack_user);
err = __td_ta_stack_user (th->th_ta_p, &list);
if (err == TD_OK)
err = check_thread_list (th, list, &uninit);
@ -70,7 +105,7 @@ td_thr_validate (const td_thrhandle_t *th)
using implementation allocated stacks. */
if (err == TD_NOTHR)
{
err = DB_GET_SYMBOL (list, th->th_ta_p, stack_used);
err = __td_ta_stack_used (th->th_ta_p, &list);
if (err == TD_OK)
err = check_thread_list (th, list, &uninit);