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htl: Fix tls initialization for already-created threads

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* sysdeps/htl/pthreadP.h: Include <link.h>
(__pthread_init_static_tls): New prototype.
* htl/pt-alloc.c (__pthread_init_static_tls): New function.
* sysdeps/mach/hurd/htl/pt-sysdep.c (_init_routine): Initialize tcb
field of initial thread. Set GL(dl_init_static_tls) to
&__pthread_init_static_tls.
This commit is contained in:
Samuel Thibault 2020-06-07 23:27:46 +00:00
parent 3944c61bdf
commit af27fabe40
3 changed files with 35 additions and 0 deletions
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29
htl/pt-alloc.c
View File

@ -212,3 +212,32 @@ retry:
*pthread = new; *pthread = new;
return 0; return 0;
} }
void
attribute_hidden
__pthread_init_static_tls (struct link_map *map)
{
int i;
__pthread_rwlock_wrlock (&__pthread_threads_lock);
for (i = 0; i < __pthread_num_threads; ++i)
{
struct __pthread *t = __pthread_threads[i];
if (t == NULL)
continue;
# if TLS_TCB_AT_TP
void *dest = (char *) t->tcb - map->l_tls_offset;
# elif TLS_DTV_AT_TP
void *dest = (char *) t->tcb + map->l_tls_offset + TLS_PRE_TCB_SIZE;
# else
# error "Either TLS_TCB_AT_TP or TLS_DTV_AT_TP must be defined"
# endif
/* Initialize the memory. */
memset (__mempcpy (dest, map->l_tls_initimage, map->l_tls_initimage_size),
'\0', map->l_tls_blocksize - map->l_tls_initimage_size);
}
__pthread_rwlock_unlock (&__pthread_threads_lock);
}

3
sysdeps/htl/pthreadP.h
View File

@ -22,10 +22,13 @@
#define __PTHREAD_HTL #define __PTHREAD_HTL
#include <pthread.h> #include <pthread.h>
#include <link.h>
/* Attribute to indicate thread creation was issued from C11 thrd_create. */ /* Attribute to indicate thread creation was issued from C11 thrd_create. */
#define ATTR_C11_THREAD ((void*)(uintptr_t)-1) #define ATTR_C11_THREAD ((void*)(uintptr_t)-1)
extern void __pthread_init_static_tls (struct link_map *) attribute_hidden;
/* These represent the interface used by glibc itself. */ /* These represent the interface used by glibc itself. */
extern pthread_t __pthread_self (void); extern pthread_t __pthread_self (void);

3
sysdeps/mach/hurd/htl/pt-sysdep.c
View File

@ -77,6 +77,7 @@ _init_routine (void *stack)
to the new stack. Pretend it wasn't allocated so that it remains to the new stack. Pretend it wasn't allocated so that it remains
valid if the main thread terminates. */ valid if the main thread terminates. */
thread->stack = 0; thread->stack = 0;
thread->tcb = THREAD_SELF;
#ifndef PAGESIZE #ifndef PAGESIZE
__pthread_default_attr.__guardsize = __vm_page_size; __pthread_default_attr.__guardsize = __vm_page_size;
@ -91,6 +92,8 @@ _init_routine (void *stack)
__pthread_atfork (NULL, NULL, reset_pthread_total); __pthread_atfork (NULL, NULL, reset_pthread_total);
GL(dl_init_static_tls) = &__pthread_init_static_tls;
/* Make MiG code thread aware. */ /* Make MiG code thread aware. */
__mig_init (thread->stackaddr); __mig_init (thread->stackaddr);