/* * 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/libkse/thread/thr_init.c 103419 2002-09-16 19:52:52Z mini $ */ /* 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" /* * All weak references used within libc should be in this table. * This will 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, &_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 }; int _pthread_guard_default; int _pthread_page_size; /* * Threaded process initialization */ void _thread_init(void) { int fd; int flags; int i; size_t len; int mib[2]; int sched_stack_size; /* Size of scheduler stack. */ struct clockinfo clockinfo; _pthread_page_size = getpagesize(); _pthread_guard_default = getpagesize(); sched_stack_size = getpagesize(); pthread_attr_default.guardsize_attr = _pthread_guard_default; /* Check if this function has already been called: */ if (_thread_initial) /* Only initialise 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"); /* * 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 and initialize the ready queue: */ if (_pq_alloc(&_readyq, PTHREAD_MIN_PRIORITY, PTHREAD_LAST_PRIORITY) != 0) { /* Abort this application: */ PANIC("Cannot allocate priority ready queue."); } /* Allocate memory for the thread structure of the initial thread: */ else if ((_thread_initial = (pthread_t) malloc(sizeof(struct pthread))) == NULL) { /* * Insufficient memory to initialise this application, so * abort: */ PANIC("Cannot allocate memory for initial thread"); } /* Allocate memory for the scheduler stack: */ else if ((_thread_kern_sched_stack = malloc(sched_stack_size)) == NULL) PANIC("Failed to allocate stack for scheduler"); else { /* Zero the global kernel thread structure: */ memset(&_thread_kern_thread, 0, sizeof(struct pthread)); _thread_kern_thread.flags = PTHREAD_FLAGS_PRIVATE; memset(_thread_initial, 0, sizeof(struct pthread)); /* Initialize the waiting and work queues: */ TAILQ_INIT(&_waitingq); TAILQ_INIT(&_workq); /* Initialize the scheduling switch hook routine: */ _sched_switch_hook = NULL; /* Give this thread default attributes: */ memcpy((void *) &_thread_initial->attr, &pthread_attr_default, sizeof(struct pthread_attr)); /* 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. */ _thread_initial->stack = _usrstack - PTHREAD_STACK_INITIAL; /* Set the stack attributes. */ _thread_initial->attr.stackaddr_attr = _thread_initial->stack; _thread_initial->attr.stacksize_attr = PTHREAD_STACK_INITIAL; /* Setup the context for the scheduler: */ getcontext(&_thread_kern_sched_ctx); _thread_kern_sched_ctx.uc_stack.ss_sp = _thread_kern_sched_stack; _thread_kern_sched_ctx.uc_stack.ss_size = sched_stack_size; makecontext(&_thread_kern_sched_ctx, _thread_kern_scheduler, 1); /* Block all signals to the scheduler's context. */ sigfillset(&_thread_kern_sched_ctx.uc_sigmask); /* * Write a magic value to the thread structure * to help identify valid ones: */ _thread_initial->magic = PTHREAD_MAGIC; /* Set the initial cancel state */ _thread_initial->cancelflags = PTHREAD_CANCEL_ENABLE | PTHREAD_CANCEL_DEFERRED; /* Setup the context for initial thread. */ getcontext(&_thread_initial->ctx); _thread_kern_sched_ctx.uc_stack.ss_sp = _thread_initial->stack; _thread_kern_sched_ctx.uc_stack.ss_size = PTHREAD_STACK_INITIAL; /* Default the priority of the initial thread: */ _thread_initial->base_priority = PTHREAD_DEFAULT_PRIORITY; _thread_initial->active_priority = PTHREAD_DEFAULT_PRIORITY; _thread_initial->inherited_priority = 0; /* Initialise the state of the initial thread: */ _thread_initial->state = PS_RUNNING; /* Set the name of the thread: */ _thread_initial->name = strdup("_thread_initial"); /* Initialize joiner to NULL (no joiner): */ _thread_initial->joiner = NULL; /* Initialize the owned mutex queue and count: */ TAILQ_INIT(&(_thread_initial->mutexq)); _thread_initial->priority_mutex_count = 0; /* Initialize the global scheduling time: */ _sched_ticks = 0; gettimeofday((struct timeval *) &_sched_tod, NULL); /* Initialize last active: */ _thread_initial->last_active = (long) _sched_ticks; /* Initialise the rest of the fields: */ _thread_initial->sig_defer_count = 0; _thread_initial->specific = NULL; _thread_initial->cleanup = NULL; _thread_initial->flags = 0; _thread_initial->error = 0; TAILQ_INIT(&_thread_list); TAILQ_INSERT_HEAD(&_thread_list, _thread_initial, tle); _set_curthread(_thread_initial); /* 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 = clockinfo.tick > CLOCK_RES_USEC_MIN ? clockinfo.tick : CLOCK_RES_USEC_MIN; } /* Initialise the garbage collector mutex and condition variable. */ if (_pthread_mutex_init(&_gc_mutex,NULL) != 0 || pthread_cond_init(&_gc_cond,NULL) != 0) PANIC("Failed to initialise garbage collector mutex or condvar"); } /* * 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