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author | Samuel Thibault <samuel.thibault@ens-lyon.org> | 2013-10-25 00:37:58 +0200 |
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committer | Samuel Thibault <samuel.thibault@ens-lyon.org> | 2013-10-25 00:37:58 +0200 |
commit | b3320e243e29a0451fb5aa6d39c6bfe2200504dc (patch) | |
tree | a891ebd96306e43ac22ff900a3d9b07861f3122a /hurd/hurdsig.c | |
parent | 4c23967459c21ee7627dd8fd3782f1671416a206 (diff) |
Drop threadvars entirely
Diffstat (limited to 'hurd/hurdsig.c')
-rw-r--r-- | hurd/hurdsig.c | 32 |
1 files changed, 21 insertions, 11 deletions
diff --git a/hurd/hurdsig.c b/hurd/hurdsig.c index ee4227a294..1d87e2e973 100644 --- a/hurd/hurdsig.c +++ b/hurd/hurdsig.c @@ -20,6 +20,7 @@ #include <string.h> #include <cthreads.h> /* For `struct mutex'. */ +#include <pthread.h> #include <mach.h> #include <mach/thread_switch.h> @@ -48,7 +49,6 @@ thread_t _hurd_sigthread; /* These are set up by _hurdsig_init. */ unsigned long int __hurd_sigthread_stack_base; unsigned long int __hurd_sigthread_stack_end; -unsigned long int *__hurd_sigthread_variables; /* Per-thread signal state. */ __thread struct hurd_sigstate *_hurd_sigstate; @@ -1261,7 +1261,11 @@ _hurdsig_init (const int *intarray, size_t intarraysize) /* Start the signal thread listening on the message port. */ - if (__hurd_threadvar_stack_mask == 0) +#pragma weak cthread_fork +#pragma weak cthread_detach +#pragma weak pthread_getattr_np +#pragma weak pthread_attr_getstack + if (!cthread_fork) { err = __thread_create (__mach_task_self (), &_hurd_msgport_thread); assert_perror (err); @@ -1276,12 +1280,6 @@ _hurdsig_init (const int *intarray, size_t intarraysize) assert_perror (err); __hurd_sigthread_stack_end = __hurd_sigthread_stack_base + stacksize; - __hurd_sigthread_variables = - malloc (__hurd_threadvar_max * sizeof (unsigned long int)); - if (__hurd_sigthread_variables == NULL) - __libc_fatal ("hurd: Can't allocate threadvars for signal thread\n"); - memset (__hurd_sigthread_variables, 0, - __hurd_threadvar_max * sizeof (unsigned long int)); /* Reinitialize the MiG support routines so they will use a per-thread variable for the cached reply port. */ @@ -1292,6 +1290,7 @@ _hurdsig_init (const int *intarray, size_t intarraysize) } else { + cthread_t thread; /* When cthreads is being used, we need to make the signal thread a proper cthread. Otherwise it cannot use mutex_lock et al, which will be the cthreads versions. Various of the message port RPC @@ -1301,9 +1300,20 @@ _hurdsig_init (const int *intarray, size_t intarraysize) we'll let the signal thread's per-thread variables be found as for any normal cthread, and just leave the magic __hurd_sigthread_* 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)); + cthread_detach (thread = cthread_fork ((cthread_fn_t) &_hurd_msgport_receive, 0)); + + if (pthread_getattr_np) + { + /* Record 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). |