diff options
Diffstat (limited to 'nptl')
| -rw-r--r-- | nptl/Versions | 6 | ||||
| -rw-r--r-- | nptl/nptl-init.c | 36 | ||||
| -rw-r--r-- | nptl/pthread-pids.h | 29 | ||||
| -rw-r--r-- | nptl/pthreadP.h | 6 | ||||
| -rw-r--r-- | nptl/pthread_create.c | 4 | ||||
| -rw-r--r-- | nptl/pthread_mutex_init.c | 2 |
6 files changed, 15 insertions, 68 deletions
diff --git a/nptl/Versions b/nptl/Versions index 9f1a51c707..2153670c7d 100644 --- a/nptl/Versions +++ b/nptl/Versions @@ -372,3 +372,9 @@ libpthread { __pthread_initialize_minimal; } } + +ld { + GLIBC_PRIVATE { + __nptl_set_robust_list_avail; + } +} \ No newline at end of file diff --git a/nptl/nptl-init.c b/nptl/nptl-init.c index 8f9d41ac62..8d3a9de44d 100644 --- a/nptl/nptl-init.c +++ b/nptl/nptl-init.c @@ -35,7 +35,6 @@ #include <futex-internal.h> #include <kernel-features.h> #include <libc-pointer-arith.h> -#include <pthread-pids.h> #include <pthread_mutex_conf.h> #ifndef TLS_MULTIPLE_THREADS_IN_TCB @@ -47,15 +46,6 @@ int *__libc_multiple_threads_ptr attribute_hidden; size_t __static_tls_size; size_t __static_tls_align_m1; -#ifndef __ASSUME_SET_ROBUST_LIST -/* Negative if we do not have the system call and we can use it. */ -int __set_robust_list_avail; -# define set_robust_list_not_avail() \ - __set_robust_list_avail = -1 -#else -# define set_robust_list_not_avail() do { } while (0) -#endif - /* Version of the library, used in libthread_db to detect mismatches. */ static const char nptl_version[] __attribute_used__ = VERSION; @@ -193,31 +183,9 @@ static bool __nptl_initial_report_events __attribute_used__; void __pthread_initialize_minimal_internal (void) { - /* Minimal initialization of the thread descriptor. */ + /* Partial initialization of the TCB already happened in TLS_INIT_TP + and __tls_init_tp. */ struct pthread *pd = THREAD_SELF; - __pthread_initialize_pids (pd); - THREAD_SETMEM (pd, specific[0], &pd->specific_1stblock[0]); - THREAD_SETMEM (pd, user_stack, true); - - /* Initialize the robust mutex data. */ - { -#if __PTHREAD_MUTEX_HAVE_PREV - pd->robust_prev = &pd->robust_head; -#endif - pd->robust_head.list = &pd->robust_head; - pd->robust_head.futex_offset = (offsetof (pthread_mutex_t, __data.__lock) - - offsetof (pthread_mutex_t, - __data.__list.__next)); - int res = INTERNAL_SYSCALL_CALL (set_robust_list, &pd->robust_head, - sizeof (struct robust_list_head)); - if (INTERNAL_SYSCALL_ERROR_P (res)) - set_robust_list_not_avail (); - } - - /* Set initial thread's stack block from 0 up to __libc_stack_end. - It will be bigger than it actually is, but for unwind.c/pt-longjmp.c - purposes this is good enough. */ - THREAD_SETMEM (pd, stackblock_size, (size_t) __libc_stack_end); /* Before initializing GL (dl_stack_user), the debugger could not find us and had to set __nptl_initial_report_events. Propagate diff --git a/nptl/pthread-pids.h b/nptl/pthread-pids.h deleted file mode 100644 index 1a0e9ade41..0000000000 --- a/nptl/pthread-pids.h +++ /dev/null @@ -1,29 +0,0 @@ -/* Initialize pid and tid fields of struct pthread. Stub version. - Copyright (C) 2015-2021 Free Software Foundation, Inc. - This file is part of the GNU C Library. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, see - <https://www.gnu.org/licenses/>. */ - -#include <pthreadP.h> - -/* Initialize PD->pid and PD->tid for the initial thread. If there is - setup required to arrange that __exit_thread causes PD->tid to be - cleared and futex-woken, then this function should do that as well. */ -static inline void -__pthread_initialize_pids (struct pthread *pd) -{ -#error "sysdeps pthread-pids.h file required" - pd->pid = pd->tid = -1; -} diff --git a/nptl/pthreadP.h b/nptl/pthreadP.h index 7a3906e2de..b61fda8942 100644 --- a/nptl/pthreadP.h +++ b/nptl/pthreadP.h @@ -224,8 +224,10 @@ extern unsigned int __nptl_nthreads; libc_hidden_proto (__nptl_nthreads) #ifndef __ASSUME_SET_ROBUST_LIST -/* Negative if we do not have the system call and we can use it. */ -extern int __set_robust_list_avail attribute_hidden; +/* True if the set_robust_list system call works. Initialized in + __tls_init_tp. */ +extern bool __nptl_set_robust_list_avail; +rtld_hidden_proto (__nptl_set_robust_list_avail) #endif /* Thread Priority Protection. */ diff --git a/nptl/pthread_create.c b/nptl/pthread_create.c index 7fc8c7a340..d89a83b38a 100644 --- a/nptl/pthread_create.c +++ b/nptl/pthread_create.c @@ -297,7 +297,7 @@ START_THREAD_DEFN __ctype_init (); #ifndef __ASSUME_SET_ROBUST_LIST - if (__set_robust_list_avail >= 0) + if (__nptl_set_robust_list_avail) #endif { /* This call should never fail because the initial call in init.c @@ -447,7 +447,7 @@ START_THREAD_DEFN /* We let the kernel do the notification if it is able to do so. If we have to do it here there for sure are no PI mutexes involved since the kernel support for them is even more recent. */ - if (__set_robust_list_avail < 0 + if (!__nptl_set_robust_list_avail && __builtin_expect (robust != (void *) &pd->robust_head, 0)) { do diff --git a/nptl/pthread_mutex_init.c b/nptl/pthread_mutex_init.c index 233cebc504..f5c3a4b464 100644 --- a/nptl/pthread_mutex_init.c +++ b/nptl/pthread_mutex_init.c @@ -95,7 +95,7 @@ __pthread_mutex_init (pthread_mutex_t *mutex, { #ifndef __ASSUME_SET_ROBUST_LIST if ((imutexattr->mutexkind & PTHREAD_MUTEXATTR_FLAG_PSHARED) != 0 - && __set_robust_list_avail < 0) + && !__nptl_set_robust_list_avail) return ENOTSUP; #endif |