diff options
| -rw-r--r-- | nptl/Makefile | 1 | ||||
| -rw-r--r-- | nptl/Versions | 1 | ||||
| -rw-r--r-- | nptl/nptl-init.c | 1 | ||||
| -rw-r--r-- | nptl/nptl_deallocate_tsd.c | 112 | ||||
| -rw-r--r-- | nptl/pthreadP.h | 3 | ||||
| -rw-r--r-- | nptl/pthread_create.c | 94 | ||||
| -rw-r--r-- | sysdeps/nptl/libc_start_call_main.h | 5 | ||||
| -rw-r--r-- | sysdeps/nptl/pthread-functions.h | 1 |
8 files changed, 116 insertions, 102 deletions
diff --git a/nptl/Makefile b/nptl/Makefile index 2111991..60fa981 100644 --- a/nptl/Makefile +++ b/nptl/Makefile @@ -45,6 +45,7 @@ routines = \ libc_multiple_threads \ libc_pthread_init \ lowlevellock \ + nptl_deallocate_tsd \ nptl_nthreads \ old_pthread_cond_destroy \ old_pthread_cond_init \ diff --git a/nptl/Versions b/nptl/Versions index 51f8d65..2fc5cc1 100644 --- a/nptl/Versions +++ b/nptl/Versions @@ -106,6 +106,7 @@ libc { __lll_lock_wait_private; __lll_trylock_elision; __lll_unlock_elision; + __nptl_deallocate_tsd; __nptl_nthreads; __pthread_attr_copy; __pthread_attr_destroy; diff --git a/nptl/nptl-init.c b/nptl/nptl-init.c index aad4f21..701876d 100644 --- a/nptl/nptl-init.c +++ b/nptl/nptl-init.c @@ -93,7 +93,6 @@ static const struct pthread_functions pthread_functions = .ptr___pthread_key_create = __pthread_key_create, .ptr___pthread_getspecific = __pthread_getspecific, .ptr___pthread_setspecific = __pthread_setspecific, - .ptr__nptl_deallocate_tsd = __nptl_deallocate_tsd, .ptr__nptl_setxid = __nptl_setxid, .ptr_set_robust = __nptl_set_robust }; diff --git a/nptl/nptl_deallocate_tsd.c b/nptl/nptl_deallocate_tsd.c new file mode 100644 index 0000000..c665f4a --- /dev/null +++ b/nptl/nptl_deallocate_tsd.c @@ -0,0 +1,112 @@ +/* Deallocation thread-specific data structures related to pthread_key_create. + This file is part of the GNU C Library. + Contributed by Ulrich Drepper <drepper@redhat.com>, 2002. + + 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> + +/* Deallocate POSIX thread-local-storage. */ +void +__nptl_deallocate_tsd (void) +{ + struct pthread *self = THREAD_SELF; + + /* Maybe no data was ever allocated. This happens often so we have + a flag for this. */ + if (THREAD_GETMEM (self, specific_used)) + { + size_t round; + size_t cnt; + + round = 0; + do + { + size_t idx; + + /* So far no new nonzero data entry. */ + THREAD_SETMEM (self, specific_used, false); + + for (cnt = idx = 0; cnt < PTHREAD_KEY_1STLEVEL_SIZE; ++cnt) + { + struct pthread_key_data *level2; + + level2 = THREAD_GETMEM_NC (self, specific, cnt); + + if (level2 != NULL) + { + size_t inner; + + for (inner = 0; inner < PTHREAD_KEY_2NDLEVEL_SIZE; + ++inner, ++idx) + { + void *data = level2[inner].data; + + if (data != NULL) + { + /* Always clear the data. */ + level2[inner].data = NULL; + + /* Make sure the data corresponds to a valid + key. This test fails if the key was + deallocated and also if it was + re-allocated. It is the user's + responsibility to free the memory in this + case. */ + if (level2[inner].seq + == __pthread_keys[idx].seq + /* It is not necessary to register a destructor + function. */ + && __pthread_keys[idx].destr != NULL) + /* Call the user-provided destructor. */ + __pthread_keys[idx].destr (data); + } + } + } + else + idx += PTHREAD_KEY_1STLEVEL_SIZE; + } + + if (THREAD_GETMEM (self, specific_used) == 0) + /* No data has been modified. */ + goto just_free; + } + /* We only repeat the process a fixed number of times. */ + while (__builtin_expect (++round < PTHREAD_DESTRUCTOR_ITERATIONS, 0)); + + /* Just clear the memory of the first block for reuse. */ + memset (&THREAD_SELF->specific_1stblock, '\0', + sizeof (self->specific_1stblock)); + + just_free: + /* Free the memory for the other blocks. */ + for (cnt = 1; cnt < PTHREAD_KEY_1STLEVEL_SIZE; ++cnt) + { + struct pthread_key_data *level2; + + level2 = THREAD_GETMEM_NC (self, specific, cnt); + if (level2 != NULL) + { + /* The first block is allocated as part of the thread + descriptor. */ + free (level2); + THREAD_SETMEM_NC (self, specific, cnt, NULL); + } + } + + THREAD_SETMEM (self, specific_used, false); + } +} +libc_hidden_def (__nptl_deallocate_tsd) diff --git a/nptl/pthreadP.h b/nptl/pthreadP.h index c6f95c7..b47c4c5 100644 --- a/nptl/pthreadP.h +++ b/nptl/pthreadP.h @@ -686,7 +686,8 @@ extern void _pthread_cleanup_push_defer (struct _pthread_cleanup_buffer *buffer, extern void _pthread_cleanup_pop_restore (struct _pthread_cleanup_buffer *buffer, int execute); -extern void __nptl_deallocate_tsd (void) attribute_hidden; +extern void __nptl_deallocate_tsd (void); +libc_hidden_proto (__nptl_deallocate_tsd) extern void __nptl_setxid_error (struct xid_command *cmdp, int error) attribute_hidden; diff --git a/nptl/pthread_create.c b/nptl/pthread_create.c index c1c5b24..7fc8c7a 100644 --- a/nptl/pthread_create.c +++ b/nptl/pthread_create.c @@ -250,100 +250,6 @@ __find_in_stack_list (struct pthread *pd) } -/* Deallocate POSIX thread-local-storage. */ -void -attribute_hidden -__nptl_deallocate_tsd (void) -{ - struct pthread *self = THREAD_SELF; - - /* Maybe no data was ever allocated. This happens often so we have - a flag for this. */ - if (THREAD_GETMEM (self, specific_used)) - { - size_t round; - size_t cnt; - - round = 0; - do - { - size_t idx; - - /* So far no new nonzero data entry. */ - THREAD_SETMEM (self, specific_used, false); - - for (cnt = idx = 0; cnt < PTHREAD_KEY_1STLEVEL_SIZE; ++cnt) - { - struct pthread_key_data *level2; - - level2 = THREAD_GETMEM_NC (self, specific, cnt); - - if (level2 != NULL) - { - size_t inner; - - for (inner = 0; inner < PTHREAD_KEY_2NDLEVEL_SIZE; - ++inner, ++idx) - { - void *data = level2[inner].data; - - if (data != NULL) - { - /* Always clear the data. */ - level2[inner].data = NULL; - - /* Make sure the data corresponds to a valid - key. This test fails if the key was - deallocated and also if it was - re-allocated. It is the user's - responsibility to free the memory in this - case. */ - if (level2[inner].seq - == __pthread_keys[idx].seq - /* It is not necessary to register a destructor - function. */ - && __pthread_keys[idx].destr != NULL) - /* Call the user-provided destructor. */ - __pthread_keys[idx].destr (data); - } - } - } - else - idx += PTHREAD_KEY_1STLEVEL_SIZE; - } - - if (THREAD_GETMEM (self, specific_used) == 0) - /* No data has been modified. */ - goto just_free; - } - /* We only repeat the process a fixed number of times. */ - while (__builtin_expect (++round < PTHREAD_DESTRUCTOR_ITERATIONS, 0)); - - /* Just clear the memory of the first block for reuse. */ - memset (&THREAD_SELF->specific_1stblock, '\0', - sizeof (self->specific_1stblock)); - - just_free: - /* Free the memory for the other blocks. */ - for (cnt = 1; cnt < PTHREAD_KEY_1STLEVEL_SIZE; ++cnt) - { - struct pthread_key_data *level2; - - level2 = THREAD_GETMEM_NC (self, specific, cnt); - if (level2 != NULL) - { - /* The first block is allocated as part of the thread - descriptor. */ - free (level2); - THREAD_SETMEM_NC (self, specific, cnt, NULL); - } - } - - THREAD_SETMEM (self, specific_used, false); - } -} - - /* Deallocate a thread's stack after optionally making sure the thread descriptor is still valid. */ void diff --git a/sysdeps/nptl/libc_start_call_main.h b/sysdeps/nptl/libc_start_call_main.h index 112cc20..c579c65 100644 --- a/sysdeps/nptl/libc_start_call_main.h +++ b/sysdeps/nptl/libc_start_call_main.h @@ -60,12 +60,7 @@ __libc_start_call_main (int (*main) (int, char **, char ** MAIN_AUXVEC_DECL), else { /* Remove the thread-local data. */ -# ifdef SHARED - PTHFCT_CALL (ptr__nptl_deallocate_tsd, ()); -# else - extern void __nptl_deallocate_tsd (void) __attribute ((weak)); __nptl_deallocate_tsd (); -# endif /* One less thread. Decrement the counter. If it is zero we terminate the entire process. */ diff --git a/sysdeps/nptl/pthread-functions.h b/sysdeps/nptl/pthread-functions.h index 2fa698b..b28b47a 100644 --- a/sysdeps/nptl/pthread-functions.h +++ b/sysdeps/nptl/pthread-functions.h @@ -55,7 +55,6 @@ struct pthread_functions int (*ptr___pthread_key_create) (pthread_key_t *, void (*) (void *)); void *(*ptr___pthread_getspecific) (pthread_key_t); int (*ptr___pthread_setspecific) (pthread_key_t, const void *); - void (*ptr__nptl_deallocate_tsd) (void); int (*ptr__nptl_setxid) (struct xid_command *); void (*ptr_set_robust) (struct pthread *); }; |