diff options
Diffstat (limited to 'linuxthreads/pthread.c')
| -rw-r--r-- | linuxthreads/pthread.c | 75 |
1 files changed, 44 insertions, 31 deletions
diff --git a/linuxthreads/pthread.c b/linuxthreads/pthread.c index 432336258c..f72e20ee09 100644 --- a/linuxthreads/pthread.c +++ b/linuxthreads/pthread.c @@ -307,6 +307,8 @@ __pthread_initialize_minimal(void) # elif !USE___THREAD if (__builtin_expect (GL(dl_tls_max_dtv_idx) == 0, 0)) { + tcbhead_t *tcbp; + /* There is no actual TLS being used, so the thread register was not initialized in the dynamic linker. */ @@ -318,7 +320,7 @@ __pthread_initialize_minimal(void) __libc_malloc_pthread_startup (true); if (__builtin_expect (_dl_tls_setup (), 0) - || __builtin_expect ((self = _dl_allocate_tls (NULL)) == NULL, 0)) + || __builtin_expect ((tcbp = _dl_allocate_tls (NULL)) == NULL, 0)) { static const char msg[] = "\ cannot allocate TLS data structures for initial thread\n"; @@ -326,7 +328,7 @@ cannot allocate TLS data structures for initial thread\n"; msg, sizeof msg - 1)); abort (); } - const char *lossage = TLS_INIT_TP (self, 0); + const char *lossage = TLS_INIT_TP (tcbp, 0); if (__builtin_expect (lossage != NULL, 0)) { static const char msg[] = "cannot set up thread-local storage: "; @@ -343,7 +345,7 @@ cannot allocate TLS data structures for initial thread\n"; the hooks might not work with that block from the plain malloc. So we record this block as unfreeable just as the dynamic linker does when it allocates the DTV before the libc malloc exists. */ - GL(dl_initial_dtv) = GET_DTV (self); + GL(dl_initial_dtv) = GET_DTV (tcbp); __libc_malloc_pthread_startup (false); } @@ -558,7 +560,10 @@ int __pthread_initialize_manager(void) int pid; struct pthread_request request; int report_events; - pthread_descr tcb; + pthread_descr mgr; +#ifdef USE_TLS + tcbhead_t *tcbp; +#endif __pthread_multiple_threads = 1; __pthread_main_thread->p_header.data.multiple_threads = 1; @@ -588,31 +593,39 @@ int __pthread_initialize_manager(void) #ifdef USE_TLS /* Allocate memory for the thread descriptor and the dtv. */ - __pthread_handles[1].h_descr = manager_thread = tcb - = _dl_allocate_tls (NULL); - if (tcb == NULL) { + tcbp = _dl_allocate_tls (NULL); + if (tcbp == NULL) { free(__pthread_manager_thread_bos); __libc_close(manager_pipe[0]); __libc_close(manager_pipe[1]); return -1; } +# if TLS_TCB_AT_TP + mgr = (pthread_descr) tcbp; +# elif TLS_DTV_AT_TP + /* pthread_descr is located right below tcbhead_t which _dl_allocate_tls + returns. */ + mgr = (pthread_descr) tcbp - 1; +# endif + __pthread_handles[1].h_descr = manager_thread = mgr; + /* Initialize the descriptor. */ - tcb->p_header.data.tcb = tcb; - tcb->p_header.data.self = tcb; - tcb->p_header.data.multiple_threads = 1; - tcb->p_lock = &__pthread_handles[1].h_lock; + mgr->p_header.data.tcb = tcbp; + mgr->p_header.data.self = mgr; + mgr->p_header.data.multiple_threads = 1; + mgr->p_lock = &__pthread_handles[1].h_lock; # ifndef HAVE___THREAD - tcb->p_errnop = &tcb->p_errno; + mgr->p_errnop = &mgr->p_errno; # endif - tcb->p_start_args = (struct pthread_start_args) PTHREAD_START_ARGS_INITIALIZER(__pthread_manager); - tcb->p_nr = 1; + mgr->p_start_args = (struct pthread_start_args) PTHREAD_START_ARGS_INITIALIZER(__pthread_manager); + mgr->p_nr = 1; # if __LT_SPINLOCK_INIT != 0 self->p_resume_count = (struct pthread_atomic) __ATOMIC_INITIALIZER; # endif - tcb->p_alloca_cutoff = PTHREAD_STACK_MIN / 4; + mgr->p_alloca_cutoff = PTHREAD_STACK_MIN / 4; #else - tcb = &__pthread_manager_thread; + mgr = &__pthread_manager_thread; #endif __pthread_manager_request = manager_pipe[1]; /* writing end */ @@ -649,24 +662,24 @@ int __pthread_initialize_manager(void) if ((mask & (__pthread_threads_events.event_bits[idx] | event_bits)) != 0) { - __pthread_lock(tcb->p_lock, NULL); + __pthread_lock(mgr->p_lock, NULL); #ifdef NEED_SEPARATE_REGISTER_STACK pid = __clone2(__pthread_manager_event, (void **) __pthread_manager_thread_bos, THREAD_MANAGER_STACK_SIZE, CLONE_VM | CLONE_FS | CLONE_FILES | CLONE_SIGHAND, - tcb); + mgr); #elif _STACK_GROWS_UP pid = __clone(__pthread_manager_event, (void **) __pthread_manager_thread_bos, CLONE_VM | CLONE_FS | CLONE_FILES | CLONE_SIGHAND, - tcb); + mgr); #else pid = __clone(__pthread_manager_event, (void **) __pthread_manager_thread_tos, CLONE_VM | CLONE_FS | CLONE_FILES | CLONE_SIGHAND, - tcb); + mgr); #endif if (pid != -1) @@ -675,18 +688,18 @@ int __pthread_initialize_manager(void) the newly created thread's data structure. We cannot let the new thread do this since we don't know whether it was already scheduled when we send the event. */ - tcb->p_eventbuf.eventdata = tcb; - tcb->p_eventbuf.eventnum = TD_CREATE; - __pthread_last_event = tcb; - tcb->p_tid = 2* PTHREAD_THREADS_MAX + 1; - tcb->p_pid = pid; + mgr->p_eventbuf.eventdata = mgr; + mgr->p_eventbuf.eventnum = TD_CREATE; + __pthread_last_event = mgr; + mgr->p_tid = 2* PTHREAD_THREADS_MAX + 1; + mgr->p_pid = pid; /* Now call the function which signals the event. */ __linuxthreads_create_event (); } /* Now restart the thread. */ - __pthread_unlock(tcb->p_lock); + __pthread_unlock(mgr->p_lock); } } @@ -695,13 +708,13 @@ int __pthread_initialize_manager(void) #ifdef NEED_SEPARATE_REGISTER_STACK pid = __clone2(__pthread_manager, (void **) __pthread_manager_thread_bos, THREAD_MANAGER_STACK_SIZE, - CLONE_VM | CLONE_FS | CLONE_FILES | CLONE_SIGHAND, tcb); + CLONE_VM | CLONE_FS | CLONE_FILES | CLONE_SIGHAND, mgr); #elif _STACK_GROWS_UP pid = __clone(__pthread_manager, (void **) __pthread_manager_thread_bos, - CLONE_VM | CLONE_FS | CLONE_FILES | CLONE_SIGHAND, tcb); + CLONE_VM | CLONE_FS | CLONE_FILES | CLONE_SIGHAND, mgr); #else pid = __clone(__pthread_manager, (void **) __pthread_manager_thread_tos, - CLONE_VM | CLONE_FS | CLONE_FILES | CLONE_SIGHAND, tcb); + CLONE_VM | CLONE_FS | CLONE_FILES | CLONE_SIGHAND, mgr); #endif } if (__builtin_expect (pid, 0) == -1) { @@ -710,8 +723,8 @@ int __pthread_initialize_manager(void) __libc_close(manager_pipe[1]); return -1; } - tcb->p_tid = 2* PTHREAD_THREADS_MAX + 1; - tcb->p_pid = pid; + mgr->p_tid = 2* PTHREAD_THREADS_MAX + 1; + mgr->p_pid = pid; /* Make gdb aware of new thread manager */ if (__builtin_expect (__pthread_threads_debug, 0) && __pthread_sig_debug > 0) { |