diff options
Diffstat (limited to 'libc/nptl/sysdeps/pthread/createthread.c')
| -rw-r--r-- | libc/nptl/sysdeps/pthread/createthread.c | 25 |
1 files changed, 16 insertions, 9 deletions
diff --git a/libc/nptl/sysdeps/pthread/createthread.c b/libc/nptl/sysdeps/pthread/createthread.c index 66fafe805..8d96387a9 100644 --- a/libc/nptl/sysdeps/pthread/createthread.c +++ b/libc/nptl/sysdeps/pthread/createthread.c @@ -1,4 +1,4 @@ -/* Copyright (C) 2002-2007, 2008 Free Software Foundation, Inc. +/* Copyright (C) 2002-2007, 2008, 2010 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Ulrich Drepper <drepper@redhat.com>, 2002. @@ -28,7 +28,7 @@ #include "kernel-features.h" -#define CLONE_SIGNAL (CLONE_SIGHAND | CLONE_THREAD) +#define CLONE_SIGNAL (CLONE_SIGHAND | CLONE_THREAD) /* Unless otherwise specified, the thread "register" is going to be initialized with a pointer to the TCB. */ @@ -72,16 +72,20 @@ do_clone (struct pthread *pd, const struct pthread_attr *attr, that cares whether the thread count is correct. */ atomic_increment (&__nptl_nthreads); - if (ARCH_CLONE (fct, STACK_VARIABLES_ARGS, clone_flags, - pd, &pd->tid, TLS_VALUE, &pd->tid) == -1) + int rc = ARCH_CLONE (fct, STACK_VARIABLES_ARGS, clone_flags, + pd, &pd->tid, TLS_VALUE, &pd->tid); + + if (__builtin_expect (rc == -1, 0)) { atomic_decrement (&__nptl_nthreads); /* Oops, we lied for a second. */ - /* Failed. If the thread is detached, remove the TCB here since - the caller cannot do this. The caller remembered the thread - as detached and cannot reverify that it is not since it must - not access the thread descriptor again. */ - if (IS_DETACHED (pd)) + /* Perhaps a thread wants to change the IDs and if waiting + for this stillborn thread. */ + if (__builtin_expect (atomic_exchange_acq (&pd->setxid_futex, 0) + == -2, 0)) + lll_futex_wake (&pd->setxid_futex, 1, LLL_PRIVATE); + + /* Free the resources. */ __deallocate_stack (pd); /* We have to translate error codes. */ @@ -114,6 +118,9 @@ do_clone (struct pthread *pd, const struct pthread_attr *attr, (void) INTERNAL_SYSCALL (tkill, err2, 2, pd->tid, SIGCANCEL); #endif + /* We do not free the stack here because the canceled thread + itself will do this. */ + return (INTERNAL_SYSCALL_ERROR_P (res, err) ? INTERNAL_SYSCALL_ERRNO (res, err) : 0); |