/* * Copyright (c) 1995-1998 John Birrell * 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. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by John Birrell. * 4. 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: head/lib/libthr/thread/thr_init.c 127556 2004-03-29 05:45:01Z mtm $ */ /* Allocate space for global thread variables here: */ #define GLOBAL_PTHREAD_PRIVATE #include "namespace.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "un-namespace.h" #include "thr_private.h" extern void _thread_init_hack(void); /* * All weak references used within libc should be in this table. * This will is so that static libraries will work. * * XXXTHR - Check this list. */ static void *references[] = { &_thread_init_hack, &_thread_init, &_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, &_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[] = { &_thread_init_hack, &_thread_init, &_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 }; int _pthread_guard_default; int _pthread_page_size; /* * Initialize the current thread. */ void init_td_common(struct pthread *td, struct pthread_attr *attrp, int reinit) { /* * Some parts of a pthread are initialized only once. */ if (!reinit) { memset(td, 0, sizeof(struct pthread)); td->cancelflags = PTHREAD_CANCEL_ENABLE | PTHREAD_CANCEL_DEFERRED; memcpy(&td->attr, attrp, sizeof(struct pthread_attr)); td->magic = PTHREAD_MAGIC; TAILQ_INIT(&td->mutexq); td->base_priority = PTHREAD_DEFAULT_PRIORITY; td->active_priority = PTHREAD_DEFAULT_PRIORITY; td->inherited_priority = PTHREAD_MIN_PRIORITY; } else { memset(&td->join_status, 0, sizeof(struct join_status)); } td->joiner = NULL; td->error = 0; td->flags = 0; } /* * Initialize the active and dead threads list. Any threads in the active * list will be removed and the thread td * will be marked as the * initial thread and inserted in the list as the only thread. Any threads * in the dead threads list will also be removed. */ void init_tdlist(struct pthread *td, int reinit) { struct pthread *tdTemp, *tdTemp2; _thread_initial = td; td->name = strdup("_thread_initial"); /* * If this is not the first initialization, remove any entries * that may be in the list and deallocate their memory. Also * destroy any global pthread primitives (they will be recreated). */ if (reinit) { TAILQ_FOREACH_SAFE(tdTemp, &_thread_list, tle, tdTemp2) { if (tdTemp != NULL) { TAILQ_REMOVE(&_thread_list, tdTemp, tle); free(tdTemp); } } TAILQ_FOREACH_SAFE(tdTemp, &_dead_list, dle, tdTemp2) { if (tdTemp != NULL) { TAILQ_REMOVE(&_dead_list, tdTemp, dle); free(tdTemp); } } _pthread_mutex_destroy(&dead_list_lock); } else { TAILQ_INIT(&_thread_list); TAILQ_INIT(&_dead_list); } /* Insert this thread as the first thread in the active list */ TAILQ_INSERT_HEAD(&_thread_list, td, tle); /* * Initialize the active thread list lock and the * dead threads list lock. */ memset(&thread_list_lock, 0, sizeof(spinlock_t)); if (_pthread_mutex_init(&dead_list_lock,NULL) != 0) PANIC("Failed to initialize garbage collector primitives"); } /* * Threaded process initialization */ void _thread_init(void) { struct pthread *pthread; int fd; int i; size_t len; int mib[2]; int error; /* Check if this function has already been called: */ if (_thread_initial) /* Only initialise the threaded application once. */ return; _pthread_page_size = getpagesize(); _pthread_guard_default = getpagesize(); pthread_attr_default.guardsize_attr = _pthread_guard_default; /* * 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"); /* * Check for the special case of this process running as * or in place of init as pid = 1: */ if (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"); if (__sys_dup2(fd, 0) == -1 || __sys_dup2(fd, 1) == -1 || __sys_dup2(fd, 2) == -1) PANIC("Can't dup2"); } /* Allocate memory for the thread structure of the initial thread: */ if ((pthread = (pthread_t) malloc(sizeof(struct pthread))) == NULL) { /* * Insufficient memory to initialise this application, so * abort: */ PANIC("Cannot allocate memory for initial thread"); } init_tdlist(pthread, 0); init_td_common(pthread, &pthread_attr_default, 0); pthread->arch_id = _set_curthread(NULL, pthread, &error); /* Get our thread id. */ thr_self(&pthread->thr_id); /* Find the stack top */ mib[0] = CTL_KERN; mib[1] = KERN_USRSTACK; len = sizeof (_usrstack); if (sysctl(mib, 2, &_usrstack, &len, NULL, 0) == -1) _usrstack = (void *)USRSTACK; /* * Create a red zone below the main stack. All other stacks are * constrained to a maximum size by the paramters 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(_usrstack - PTHREAD_STACK_INITIAL - _pthread_guard_default, _pthread_guard_default, 0, MAP_ANON, -1, 0) == MAP_FAILED) PANIC("Cannot allocate red zone for initial thread"); /* Set the main thread stack pointer. */ pthread->stack = _usrstack - PTHREAD_STACK_INITIAL; /* Set the stack attributes. */ pthread->attr.stackaddr_attr = pthread->stack; pthread->attr.stacksize_attr = PTHREAD_STACK_INITIAL; /* Setup the context for initial thread. */ getcontext(&pthread->ctx); pthread->ctx.uc_stack.ss_sp = pthread->stack; pthread->ctx.uc_stack.ss_size = PTHREAD_STACK_INITIAL; /* Initialise the state of the initial thread: */ pthread->state = PS_RUNNING; /* Enter a loop to get the existing signal status: */ for (i = 1; i < NSIG; i++) { /* Check for signals which cannot be trapped. */ if (i == SIGKILL || i == SIGSTOP) continue; /* Get the signal handler details. */ if (__sys_sigaction(i, NULL, &_thread_sigact[i - 1]) != 0) PANIC("Cannot read signal handler info"); } } /* * Special start up code for NetBSD/Alpha */ #if defined(__NetBSD__) && defined(__alpha__) int main(int argc, char *argv[], char *env); int _thread_main(int argc, char *argv[], char *env) { _thread_init(); return (main(argc, argv, env)); } #endif