diff options
Diffstat (limited to 'nptl/pthread_create.c')
| -rw-r--r-- | nptl/pthread_create.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/nptl/pthread_create.c b/nptl/pthread_create.c index 6d6ab88960..f348a6f6dd 100644 --- a/nptl/pthread_create.c +++ b/nptl/pthread_create.c @@ -33,6 +33,7 @@ #include <default-sched.h> #include <futex-internal.h> #include <tls-setup.h> +#include <rseq-internal.h> #include "libioP.h" #include <shlib-compat.h> @@ -384,6 +385,9 @@ START_THREAD_DEFN /* Initialize pointers to locale data. */ __ctype_init (); + /* Register rseq TLS to the kernel. */ + rseq_register_current_thread (); + #ifndef __ASSUME_SET_ROBUST_LIST if (__set_robust_list_avail >= 0) #endif @@ -580,6 +584,15 @@ START_THREAD_DEFN process is really dead since 'clone' got passed the CLONE_CHILD_CLEARTID flag. The 'tid' field in the TCB will be set to zero. + rseq TLS is still registered at this point. Rely on implicit + unregistration performed by the kernel on thread teardown. This is not a + problem because the rseq TLS lives on the stack, and the stack outlives + the thread. If TCB allocation is ever changed, additional steps may be + required, such as performing explicit rseq unregistration before + reclaiming the rseq TLS area memory. It is NOT sufficient to block + signals because the kernel may write to the rseq area even without + signals. + The exit code is zero since in case all threads exit by calling 'pthread_exit' the exit status must be 0 (zero). */ __exit_thread (); |