Create timer thread with sufficiant stack size (take into account allocated space for thread-local-storage), for this backport glibc commit 'Create internal threads with sufficient stack size' ([1], [2]) introducing __pthread_get_minstack() and use it in __start_helper_thread().

Fixes timer_create() in case of linking with library using large TLS area (e.g openblas, see [3]).

[1] https://sourceware.org/git/?p=glibc.git;a=commitdiff;h=2c1094bd700e63a8d7f54... [2] https://sourceware.org/git/?p=glibc.git;a=commitdiff;h=630f4cc3aa019ede55976... [3] http://lists.busybox.net/pipermail/buildroot/2021-April/308281.html

Signed-off-by: Peter Seiderer ps.report@gmx.net --- libpthread/nptl/init.c | 6 ++++++ libpthread/nptl/pthreadP.h | 1 + libpthread/nptl/sysdeps/unix/sysv/linux/timer_routines.c | 2 +- 3 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/libpthread/nptl/init.c b/libpthread/nptl/init.c index 4959d5ed8..5d25ded7d 100644 --- a/libpthread/nptl/init.c +++ b/libpthread/nptl/init.c @@ -337,3 +337,9 @@ __pthread_initialize_minimal_internal (void) } strong_alias (__pthread_initialize_minimal_internal, __pthread_initialize_minimal) + +size_t +__pthread_get_minstack (const pthread_attr_t *attr) +{ + return __static_tls_size + PTHREAD_STACK_MIN; +} diff --git a/libpthread/nptl/pthreadP.h b/libpthread/nptl/pthreadP.h index 13205512a..c686a4ca5 100644 --- a/libpthread/nptl/pthreadP.h +++ b/libpthread/nptl/pthreadP.h @@ -377,6 +377,7 @@ weak_function;

extern void __pthread_init_static_tls (struct link_map *) attribute_hidden;

+extern size_t __pthread_get_minstack (const pthread_attr_t *attr);

/* Namespace save aliases. */ extern int __pthread_getschedparam (pthread_t thread_id, int *policy, diff --git a/libpthread/nptl/sysdeps/unix/sysv/linux/timer_routines.c b/libpthread/nptl/sysdeps/unix/sysv/linux/timer_routines.c index 514913317..60f2a724c 100644 --- a/libpthread/nptl/sysdeps/unix/sysv/linux/timer_routines.c +++ b/libpthread/nptl/sysdeps/unix/sysv/linux/timer_routines.c @@ -164,7 +164,7 @@ __start_helper_thread (void) and should go away automatically when canceled. */ pthread_attr_t attr; (void) pthread_attr_init (&attr); - (void) pthread_attr_setstacksize (&attr, PTHREAD_STACK_MIN); + (void) pthread_attr_setstacksize (&attr, __pthread_get_minstack (&attr));

/* Block all signals in the helper thread but SIGSETXID. To do this thoroughly we temporarily have to block all signals here. The