diff options
Diffstat (limited to 'lib/libpthread/thread/thr_init.c')
| -rw-r--r-- | lib/libpthread/thread/thr_init.c | 530 |
1 files changed, 0 insertions, 530 deletions
diff --git a/lib/libpthread/thread/thr_init.c b/lib/libpthread/thread/thr_init.c deleted file mode 100644 index 5c8aac4..0000000 --- a/lib/libpthread/thread/thr_init.c +++ /dev/null @@ -1,530 +0,0 @@ -/* - * Copyright (c) 2003 Daniel M. Eischen <deischen@freebsd.org> - * Copyright (c) 1995-1998 John Birrell <jb@cimlogic.com.au> - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. Neither the name of the author nor the names of any co-contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY JOHN BIRRELL AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - * - * $FreeBSD$ - */ - -/* Allocate space for global thread variables here: */ -#define GLOBAL_PTHREAD_PRIVATE - -#include "namespace.h" -#include <sys/param.h> -#include <sys/types.h> -#include <sys/signalvar.h> -#include <machine/reg.h> - -#include <sys/ioctl.h> -#include <sys/mount.h> -#include <sys/uio.h> -#include <sys/socket.h> -#include <sys/event.h> -#include <sys/stat.h> -#include <sys/sysctl.h> -#include <sys/time.h> -#include <sys/ttycom.h> -#include <sys/wait.h> -#include <sys/mman.h> -#include <dirent.h> -#include <errno.h> -#include <fcntl.h> -#include <paths.h> -#include <pthread.h> -#include <pthread_np.h> -#include <signal.h> -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <unistd.h> -#include "un-namespace.h" - -#include "libc_private.h" -#include "thr_private.h" - -LT10_COMPAT_PRIVATE(_libkse_debug); -LT10_COMPAT_PRIVATE(_thread_activated); -LT10_COMPAT_PRIVATE(_thread_active_threads); -LT10_COMPAT_PRIVATE(_thread_list); - -int __pthread_cond_wait(pthread_cond_t *, pthread_mutex_t *); -int __pthread_mutex_lock(pthread_mutex_t *); -int __pthread_mutex_trylock(pthread_mutex_t *); -void _thread_init_hack(void); -extern int _thread_state_running; - -static void init_private(void); -static void init_main_thread(struct pthread *thread); - -/* - * All weak references used within libc should be in this table. - * This is so that static libraries will work. - */ -static void *references[] = { - &_accept, - &_bind, - &_close, - &_connect, - &_dup, - &_dup2, - &_execve, - &_fcntl, - &_flock, - &_flockfile, - &_fstat, - &_fstatfs, - &_fsync, - &_funlockfile, - &_getdirentries, - &_getlogin, - &_getpeername, - &_getsockname, - &_getsockopt, - &_ioctl, - &_kevent, - &_listen, - &_nanosleep, - &_open, - &_pthread_getspecific, - &_pthread_key_create, - &_pthread_key_delete, - &_pthread_mutex_destroy, - &_pthread_mutex_init, - &_pthread_mutex_lock, - &_pthread_mutex_trylock, - &_pthread_mutex_unlock, - &_pthread_mutexattr_init, - &_pthread_mutexattr_destroy, - &_pthread_mutexattr_settype, - &_pthread_once, - &_pthread_setspecific, - &_read, - &_readv, - &_recvfrom, - &_recvmsg, - &_select, - &_sendmsg, - &_sendto, - &_setsockopt, - &_sigaction, - &_sigprocmask, - &_sigsuspend, - &_socket, - &_socketpair, - &_thread_init_hack, - &_wait4, - &_write, - &_writev -}; - -/* - * These are needed when linking statically. All references within - * libgcc (and in the future libc) to these routines are weak, but - * if they are not (strongly) referenced by the application or other - * libraries, then the actual functions will not be loaded. - */ -static void *libgcc_references[] = { - &_pthread_once, - &_pthread_key_create, - &_pthread_key_delete, - &_pthread_getspecific, - &_pthread_setspecific, - &_pthread_mutex_init, - &_pthread_mutex_destroy, - &_pthread_mutex_lock, - &_pthread_mutex_trylock, - &_pthread_mutex_unlock -}; - -#define DUAL_ENTRY(entry) \ - (pthread_func_t)entry, (pthread_func_t)entry - -static pthread_func_t jmp_table[][2] = { - {DUAL_ENTRY(_pthread_atfork)}, /* PJT_ATFORK */ - {DUAL_ENTRY(_pthread_attr_destroy)}, /* PJT_ATTR_DESTROY */ - {DUAL_ENTRY(_pthread_attr_getdetachstate)}, /* PJT_ATTR_GETDETACHSTATE */ - {DUAL_ENTRY(_pthread_attr_getguardsize)}, /* PJT_ATTR_GETGUARDSIZE */ - {DUAL_ENTRY(_pthread_attr_getinheritsched)}, /* PJT_ATTR_GETINHERITSCHED */ - {DUAL_ENTRY(_pthread_attr_getschedparam)}, /* PJT_ATTR_GETSCHEDPARAM */ - {DUAL_ENTRY(_pthread_attr_getschedpolicy)}, /* PJT_ATTR_GETSCHEDPOLICY */ - {DUAL_ENTRY(_pthread_attr_getscope)}, /* PJT_ATTR_GETSCOPE */ - {DUAL_ENTRY(_pthread_attr_getstackaddr)}, /* PJT_ATTR_GETSTACKADDR */ - {DUAL_ENTRY(_pthread_attr_getstacksize)}, /* PJT_ATTR_GETSTACKSIZE */ - {DUAL_ENTRY(_pthread_attr_init)}, /* PJT_ATTR_INIT */ - {DUAL_ENTRY(_pthread_attr_setdetachstate)}, /* PJT_ATTR_SETDETACHSTATE */ - {DUAL_ENTRY(_pthread_attr_setguardsize)}, /* PJT_ATTR_SETGUARDSIZE */ - {DUAL_ENTRY(_pthread_attr_setinheritsched)}, /* PJT_ATTR_SETINHERITSCHED */ - {DUAL_ENTRY(_pthread_attr_setschedparam)}, /* PJT_ATTR_SETSCHEDPARAM */ - {DUAL_ENTRY(_pthread_attr_setschedpolicy)}, /* PJT_ATTR_SETSCHEDPOLICY */ - {DUAL_ENTRY(_pthread_attr_setscope)}, /* PJT_ATTR_SETSCOPE */ - {DUAL_ENTRY(_pthread_attr_setstackaddr)}, /* PJT_ATTR_SETSTACKADDR */ - {DUAL_ENTRY(_pthread_attr_setstacksize)}, /* PJT_ATTR_SETSTACKSIZE */ - {DUAL_ENTRY(_pthread_cancel)}, /* PJT_CANCEL */ - {DUAL_ENTRY(_pthread_cleanup_pop)}, /* PJT_CLEANUP_POP */ - {DUAL_ENTRY(_pthread_cleanup_push)}, /* PJT_CLEANUP_PUSH */ - {DUAL_ENTRY(_pthread_cond_broadcast)}, /* PJT_COND_BROADCAST */ - {DUAL_ENTRY(_pthread_cond_destroy)}, /* PJT_COND_DESTROY */ - {DUAL_ENTRY(_pthread_cond_init)}, /* PJT_COND_INIT */ - {DUAL_ENTRY(_pthread_cond_signal)}, /* PJT_COND_SIGNAL */ - {DUAL_ENTRY(_pthread_cond_timedwait)}, /* PJT_COND_TIMEDWAIT */ - {(pthread_func_t)__pthread_cond_wait, - (pthread_func_t)_pthread_cond_wait}, /* PJT_COND_WAIT */ - {DUAL_ENTRY(_pthread_detach)}, /* PJT_DETACH */ - {DUAL_ENTRY(_pthread_equal)}, /* PJT_EQUAL */ - {DUAL_ENTRY(_pthread_exit)}, /* PJT_EXIT */ - {DUAL_ENTRY(_pthread_getspecific)}, /* PJT_GETSPECIFIC */ - {DUAL_ENTRY(_pthread_join)}, /* PJT_JOIN */ - {DUAL_ENTRY(_pthread_key_create)}, /* PJT_KEY_CREATE */ - {DUAL_ENTRY(_pthread_key_delete)}, /* PJT_KEY_DELETE*/ - {DUAL_ENTRY(_pthread_kill)}, /* PJT_KILL */ - {DUAL_ENTRY(_pthread_main_np)}, /* PJT_MAIN_NP */ - {DUAL_ENTRY(_pthread_mutexattr_destroy)}, /* PJT_MUTEXATTR_DESTROY */ - {DUAL_ENTRY(_pthread_mutexattr_init)}, /* PJT_MUTEXATTR_INIT */ - {DUAL_ENTRY(_pthread_mutexattr_settype)}, /* PJT_MUTEXATTR_SETTYPE */ - {DUAL_ENTRY(_pthread_mutex_destroy)}, /* PJT_MUTEX_DESTROY */ - {DUAL_ENTRY(_pthread_mutex_init)}, /* PJT_MUTEX_INIT */ - {(pthread_func_t)__pthread_mutex_lock, - (pthread_func_t)_pthread_mutex_lock}, /* PJT_MUTEX_LOCK */ - {(pthread_func_t)__pthread_mutex_trylock, - (pthread_func_t)_pthread_mutex_trylock},/* PJT_MUTEX_TRYLOCK */ - {DUAL_ENTRY(_pthread_mutex_unlock)}, /* PJT_MUTEX_UNLOCK */ - {DUAL_ENTRY(_pthread_once)}, /* PJT_ONCE */ - {DUAL_ENTRY(_pthread_rwlock_destroy)}, /* PJT_RWLOCK_DESTROY */ - {DUAL_ENTRY(_pthread_rwlock_init)}, /* PJT_RWLOCK_INIT */ - {DUAL_ENTRY(_pthread_rwlock_rdlock)}, /* PJT_RWLOCK_RDLOCK */ - {DUAL_ENTRY(_pthread_rwlock_tryrdlock)},/* PJT_RWLOCK_TRYRDLOCK */ - {DUAL_ENTRY(_pthread_rwlock_trywrlock)},/* PJT_RWLOCK_TRYWRLOCK */ - {DUAL_ENTRY(_pthread_rwlock_unlock)}, /* PJT_RWLOCK_UNLOCK */ - {DUAL_ENTRY(_pthread_rwlock_wrlock)}, /* PJT_RWLOCK_WRLOCK */ - {DUAL_ENTRY(_pthread_self)}, /* PJT_SELF */ - {DUAL_ENTRY(_pthread_setcancelstate)}, /* PJT_SETCANCELSTATE */ - {DUAL_ENTRY(_pthread_setcanceltype)}, /* PJT_SETCANCELTYPE */ - {DUAL_ENTRY(_pthread_setspecific)}, /* PJT_SETSPECIFIC */ - {DUAL_ENTRY(_pthread_sigmask)}, /* PJT_SIGMASK */ - {DUAL_ENTRY(_pthread_testcancel)} /* PJT_TESTCANCEL */ -}; - -static int init_once = 0; - -/* - * Threaded process initialization. - * - * This is only called under two conditions: - * - * 1) Some thread routines have detected that the library hasn't yet - * been initialized (_thr_initial == NULL && curthread == NULL), or - * - * 2) An explicit call to reinitialize after a fork (indicated - * by curthread != NULL) - */ -void -_libpthread_init(struct pthread *curthread) -{ - int fd; - - /* Check if this function has already been called: */ - if ((_thr_initial != NULL) && (curthread == NULL)) - /* Only initialize the threaded application once. */ - return; - - /* - * Make gcc quiescent about {,libgcc_}references not being - * referenced: - */ - if ((references[0] == NULL) || (libgcc_references[0] == NULL)) - PANIC("Failed loading mandatory references in _thread_init"); - - /* Pull debug symbols in for static binary */ - _thread_state_running = PS_RUNNING; - - /* - * Check the size of the jump table to make sure it is preset - * with the correct number of entries. - */ - if (sizeof(jmp_table) != (sizeof(pthread_func_t) * PJT_MAX * 2)) - PANIC("Thread jump table not properly initialized"); - memcpy(__thr_jtable, jmp_table, sizeof(jmp_table)); - - /* - * Check for the special case of this process running as - * or in place of init as pid = 1: - */ - if ((_thr_pid = getpid()) == 1) { - /* - * Setup a new session for this process which is - * assumed to be running as root. - */ - if (setsid() == -1) - PANIC("Can't set session ID"); - if (revoke(_PATH_CONSOLE) != 0) - PANIC("Can't revoke console"); - if ((fd = __sys_open(_PATH_CONSOLE, O_RDWR)) < 0) - PANIC("Can't open console"); - if (setlogin("root") == -1) - PANIC("Can't set login to root"); - if (__sys_ioctl(fd, TIOCSCTTY, (char *) NULL) == -1) - PANIC("Can't set controlling terminal"); - } - - /* Initialize pthread private data. */ - init_private(); - _kse_init(); - - /* Initialize the initial kse and kseg. */ - _kse_initial = _kse_alloc(NULL, _thread_scope_system > 0); - if (_kse_initial == NULL) - PANIC("Can't allocate initial kse."); - _kse_initial->k_kseg = _kseg_alloc(NULL); - if (_kse_initial->k_kseg == NULL) - PANIC("Can't allocate initial kseg."); - _kse_initial->k_kseg->kg_flags |= KGF_SINGLE_THREAD; - _kse_initial->k_schedq = &_kse_initial->k_kseg->kg_schedq; - - TAILQ_INSERT_TAIL(&_kse_initial->k_kseg->kg_kseq, _kse_initial, k_kgqe); - _kse_initial->k_kseg->kg_ksecount = 1; - - /* Set the initial thread. */ - if (curthread == NULL) { - /* Create and initialize the initial thread. */ - curthread = _thr_alloc(NULL); - if (curthread == NULL) - PANIC("Can't allocate initial thread"); - _thr_initial = curthread; - init_main_thread(curthread); - } else { - /* - * The initial thread is the current thread. It is - * assumed that the current thread is already initialized - * because it is left over from a fork(). - */ - _thr_initial = curthread; - } - _kse_initial->k_kseg->kg_threadcount = 0; - _thr_initial->kse = _kse_initial; - _thr_initial->kseg = _kse_initial->k_kseg; - _thr_initial->active = 1; - - /* - * Add the thread to the thread list and to the KSEG's thread - * queue. - */ - THR_LIST_ADD(_thr_initial); - KSEG_THRQ_ADD(_kse_initial->k_kseg, _thr_initial); - - /* Setup the KSE/thread specific data for the current KSE/thread. */ - _thr_initial->kse->k_curthread = _thr_initial; - _kcb_set(_thr_initial->kse->k_kcb); - _tcb_set(_thr_initial->kse->k_kcb, _thr_initial->tcb); - _thr_initial->kse->k_flags |= KF_INITIALIZED; - - _thr_signal_init(); - _kse_critical_leave(&_thr_initial->tcb->tcb_tmbx); - /* - * activate threaded mode as soon as possible if we are - * being debugged - */ - if (_libkse_debug) - _kse_setthreaded(1); -} - -/* - * This function and pthread_create() do a lot of the same things. - * It'd be nice to consolidate the common stuff in one place. - */ -static void -init_main_thread(struct pthread *thread) -{ - /* Setup the thread attributes. */ - thread->attr = _pthread_attr_default; - thread->attr.flags |= PTHREAD_SCOPE_SYSTEM; - /* - * Set up the thread stack. - * - * Create a red zone below the main stack. All other stacks - * are constrained to a maximum size by the parameters - * passed to mmap(), but this stack is only limited by - * resource limits, so this stack needs an explicitly mapped - * red zone to protect the thread stack that is just beyond. - */ - if (mmap((void *)_usrstack - _thr_stack_initial - - _thr_guard_default, _thr_guard_default, 0, MAP_ANON, - -1, 0) == MAP_FAILED) - PANIC("Cannot allocate red zone for initial thread"); - - /* - * Mark the stack as an application supplied stack so that it - * isn't deallocated. - * - * XXX - I'm not sure it would hurt anything to deallocate - * the main thread stack because deallocation doesn't - * actually free() it; it just puts it in the free - * stack queue for later reuse. - */ - thread->attr.stackaddr_attr = (void *)_usrstack - _thr_stack_initial; - thread->attr.stacksize_attr = _thr_stack_initial; - thread->attr.guardsize_attr = _thr_guard_default; - thread->attr.flags |= THR_STACK_USER; - - /* - * Write a magic value to the thread structure - * to help identify valid ones: - */ - thread->magic = THR_MAGIC; - - thread->slice_usec = -1; - thread->cancelflags = PTHREAD_CANCEL_ENABLE | PTHREAD_CANCEL_DEFERRED; - thread->name = strdup("initial thread"); - - /* Initialize the thread for signals: */ - SIGEMPTYSET(thread->sigmask); - - /* - * Set up the thread mailbox. The threads saved context - * is also in the mailbox. - */ - thread->tcb->tcb_tmbx.tm_udata = thread; - thread->tcb->tcb_tmbx.tm_context.uc_stack.ss_size = - thread->attr.stacksize_attr; - thread->tcb->tcb_tmbx.tm_context.uc_stack.ss_sp = - thread->attr.stackaddr_attr; - - /* Default the priority of the initial thread: */ - thread->base_priority = THR_DEFAULT_PRIORITY; - thread->active_priority = THR_DEFAULT_PRIORITY; - thread->inherited_priority = 0; - - /* Initialize the mutex queue: */ - TAILQ_INIT(&thread->mutexq); - - /* Initialize hooks in the thread structure: */ - thread->specific = NULL; - thread->cleanup = NULL; - thread->flags = 0; - thread->sigbackout = NULL; - thread->continuation = NULL; - - thread->state = PS_RUNNING; - thread->uniqueid = 0; -} - -static void -init_private(void) -{ - struct clockinfo clockinfo; - size_t len; - int mib[2]; - - /* - * Avoid reinitializing some things if they don't need to be, - * e.g. after a fork(). - */ - if (init_once == 0) { - /* Find the stack top */ - mib[0] = CTL_KERN; - mib[1] = KERN_USRSTACK; - len = sizeof (_usrstack); - if (sysctl(mib, 2, &_usrstack, &len, NULL, 0) == -1) - PANIC("Cannot get kern.usrstack from sysctl"); - /* Get the kernel clockrate: */ - mib[0] = CTL_KERN; - mib[1] = KERN_CLOCKRATE; - len = sizeof (struct clockinfo); - if (sysctl(mib, 2, &clockinfo, &len, NULL, 0) == 0) - _clock_res_usec = 1000000 / clockinfo.stathz; - else - _clock_res_usec = CLOCK_RES_USEC; - - _thr_page_size = getpagesize(); - _thr_guard_default = _thr_page_size; - if (sizeof(void *) == 8) { - _thr_stack_default = THR_STACK64_DEFAULT; - _thr_stack_initial = THR_STACK64_INITIAL; - } - else { - _thr_stack_default = THR_STACK32_DEFAULT; - _thr_stack_initial = THR_STACK32_INITIAL; - } - _pthread_attr_default.guardsize_attr = _thr_guard_default; - _pthread_attr_default.stacksize_attr = _thr_stack_default; - TAILQ_INIT(&_thr_atfork_list); - init_once = 1; /* Don't do this again. */ - } else { - /* - * Destroy the locks before creating them. We don't - * know what state they are in so it is better to just - * recreate them. - */ - _lock_destroy(&_thread_signal_lock); - _lock_destroy(&_mutex_static_lock); - _lock_destroy(&_rwlock_static_lock); - _lock_destroy(&_keytable_lock); - } - - /* Initialize everything else. */ - TAILQ_INIT(&_thread_list); - TAILQ_INIT(&_thread_gc_list); - _pthread_mutex_init(&_thr_atfork_mutex, NULL); - - /* - * Initialize the lock for temporary installation of signal - * handlers (to support sigwait() semantics) and for the - * process signal mask and pending signal sets. - */ - if (_lock_init(&_thread_signal_lock, LCK_ADAPTIVE, - _kse_lock_wait, _kse_lock_wakeup) != 0) - PANIC("Cannot initialize _thread_signal_lock"); - if (_lock_init(&_mutex_static_lock, LCK_ADAPTIVE, - _thr_lock_wait, _thr_lock_wakeup) != 0) - PANIC("Cannot initialize mutex static init lock"); - if (_lock_init(&_rwlock_static_lock, LCK_ADAPTIVE, - _thr_lock_wait, _thr_lock_wakeup) != 0) - PANIC("Cannot initialize rwlock static init lock"); - if (_lock_init(&_keytable_lock, LCK_ADAPTIVE, - _thr_lock_wait, _thr_lock_wakeup) != 0) - PANIC("Cannot initialize thread specific keytable lock"); - _thr_spinlock_init(); - - /* Clear pending signals and get the process signal mask. */ - SIGEMPTYSET(_thr_proc_sigpending); - - /* Are we in M:N mode (default) or 1:1 mode? */ -#ifdef SYSTEM_SCOPE_ONLY - _thread_scope_system = 1; -#else - if (getenv("LIBPTHREAD_SYSTEM_SCOPE") != NULL) - _thread_scope_system = 1; - else if (getenv("LIBPTHREAD_PROCESS_SCOPE") != NULL) - _thread_scope_system = -1; -#endif - if (getenv("LIBPTHREAD_DEBUG") != NULL) - _thr_debug_flags |= DBG_INFO_DUMP; - - /* - * _thread_list_lock and _kse_count are initialized - * by _kse_init() - */ -} |
