diff options
Diffstat (limited to 'nptl/pthread_create.c')
| -rw-r--r-- | nptl/pthread_create.c | 51 |
1 files changed, 43 insertions, 8 deletions
diff --git a/nptl/pthread_create.c b/nptl/pthread_create.c index b78bd95..7f714f8 100644 --- a/nptl/pthread_create.c +++ b/nptl/pthread_create.c @@ -449,18 +449,47 @@ __pthread_create_2_1 (newthread, attr, start_routine, arg) STACK_VARIABLES; const struct pthread_attr *iattr = (struct pthread_attr *) attr; + struct pthread_attr default_attr; + bool free_cpuset = false; if (iattr == NULL) - /* Is this the best idea? On NUMA machines this could mean - accessing far-away memory. */ - iattr = &__default_pthread_attr; + { + lll_lock (__default_pthread_attr_lock, LLL_PRIVATE); + default_attr = __default_pthread_attr; + size_t cpusetsize = default_attr.cpusetsize; + if (cpusetsize > 0) + { + cpu_set_t *cpuset; + if (__glibc_likely (__libc_use_alloca (cpusetsize))) + cpuset = __alloca (cpusetsize); + else + { + cpuset = malloc (cpusetsize); + if (cpuset == NULL) + { + lll_unlock (__default_pthread_attr_lock, LLL_PRIVATE); + return ENOMEM; + } + free_cpuset = true; + } + memcpy (cpuset, default_attr.cpuset, cpusetsize); + default_attr.cpuset = cpuset; + } + lll_unlock (__default_pthread_attr_lock, LLL_PRIVATE); + iattr = &default_attr; + } struct pthread *pd = NULL; int err = ALLOCATE_STACK (iattr, &pd); + int retval = 0; + if (__builtin_expect (err != 0, 0)) /* Something went wrong. Maybe a parameter of the attributes is invalid or we could not allocate memory. Note we have to translate error codes. */ - return err == ENOMEM ? EAGAIN : err; + { + retval = err == ENOMEM ? EAGAIN : err; + goto out; + } /* Initialize the TCB. All initializations with zero should be @@ -511,8 +540,7 @@ __pthread_create_2_1 (newthread, attr, start_routine, arg) #endif /* Determine scheduling parameters for the thread. */ - if (attr != NULL - && __builtin_expect ((iattr->flags & ATTR_FLAG_NOTINHERITSCHED) != 0, 0) + if (__builtin_expect ((iattr->flags & ATTR_FLAG_NOTINHERITSCHED) != 0, 0) && (iattr->flags & (ATTR_FLAG_SCHED_SET | ATTR_FLAG_POLICY_SET)) != 0) { INTERNAL_SYSCALL_DECL (scerr); @@ -551,7 +579,8 @@ __pthread_create_2_1 (newthread, attr, start_routine, arg) __deallocate_stack (pd); - return EINVAL; + retval = EINVAL; + goto out; } } @@ -561,7 +590,13 @@ __pthread_create_2_1 (newthread, attr, start_routine, arg) LIBC_PROBE (pthread_create, 4, newthread, attr, start_routine, arg); /* Start the thread. */ - return create_thread (pd, iattr, STACK_VARIABLES_ARGS); + retval = create_thread (pd, iattr, STACK_VARIABLES_ARGS); + + out: + if (__glibc_unlikely (free_cpuset)) + free (default_attr.cpuset); + + return retval; } versioned_symbol (libpthread, __pthread_create_2_1, pthread_create, GLIBC_2_1); |