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hurd: Fix getting signal thread stack layout for fork

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* hurd/hurdsig.c: Include <pthread.h>.
(_hurdsig_init): Call pthread_getattr_np and pthread_attr_getstack to
get the signal thread stack layout.
This commit is contained in:
Samuel Thibault 2018-03-17 22:50:09 +01:00
parent f8baf2a224
commit 34e6a8694d
2 changed files with 25 additions and 1 deletions
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ChangeLog
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@ -1,3 +1,9 @@
2018-03-17 Samuel Thibault <samuel.thibault@ens-lyon.org>
* hurd/hurdsig.c: Include <pthread.h>.
(_hurdsig_init): Call pthread_getattr_np and pthread_attr_getstack to
get the signal thread stack layout.
2018-03-16 Samuel Thibault <samuel.thibault@ens-lyon.org>
* sysdeps/generic/thread_state.h (MACHINE_NEW_THREAD_STATE_FLAVOR):

20
hurd/hurdsig.c
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@ -20,6 +20,7 @@
#include <string.h>
#include <cthreads.h> /* For `struct mutex'. */
#include <pthread.h>
#include <mach.h>
#include <mach/thread_switch.h>
@ -1297,7 +1298,24 @@ _hurdsig_init (const int *intarray, size_t intarraysize)
values all zero so they'll be ignored. */
#pragma weak cthread_fork
#pragma weak cthread_detach
cthread_detach (cthread_fork ((cthread_fn_t) &_hurd_msgport_receive, 0));
#pragma weak pthread_getattr_np
#pragma weak pthread_attr_getstack
cthread_t thread = cthread_fork ((cthread_fn_t) &_hurd_msgport_receive,
0);
cthread_detach (thread);
if (pthread_getattr_np)
{
/* Record signal thread stack layout for fork() */
pthread_attr_t attr;
void *addr;
size_t size;
pthread_getattr_np ((pthread_t) thread, &attr);
pthread_attr_getstack (&attr, &addr, &size);
__hurd_sigthread_stack_base = (uintptr_t) addr;
__hurd_sigthread_stack_end = __hurd_sigthread_stack_base + size;
}
/* XXX We need the thread port for the signal thread further on
in this thread (see hurdfault.c:_hurdsigfault_init).