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-rw-r--r--lib/libkse/thread/thr_init.c475
1 files changed, 475 insertions, 0 deletions
diff --git a/lib/libkse/thread/thr_init.c b/lib/libkse/thread/thr_init.c
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index 000000000000..a3d62ae0f9da
--- /dev/null
+++ b/lib/libkse/thread/thr_init.c
@@ -0,0 +1,475 @@
+/*
+ * 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. 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.
+ *
+ * $FreeBSD$
+ */
+
+/* Allocate space for global thread variables here: */
+#define GLOBAL_PTHREAD_PRIVATE
+
+#include "namespace.h"
+#include <sys/param.h>
+#include <sys/types.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/user.h>
+#include <sys/wait.h>
+#include <sys/mman.h>
+#include <dirent.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <paths.h>
+#include <poll.h>
+#include <pthread.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include "un-namespace.h"
+
+#include "pthread_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
+};
+
+
+/*
+ * Threaded process initialization
+ */
+void
+_thread_init(void)
+{
+ int fd;
+ int flags;
+ int i;
+ size_t len;
+ int mib[2];
+ struct clockinfo clockinfo;
+ struct sigaction act;
+
+ /* 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");
+ }
+
+ /* Get the standard I/O flags before messing with them : */
+ for (i = 0; i < 3; i++)
+ if (((_pthread_stdio_flags[i] =
+ __sys_fcntl(i,F_GETFL, NULL)) == -1) &&
+ (errno != EBADF))
+ PANIC("Cannot get stdio flags");
+
+ /*
+ * Create a pipe that is written to by the signal handler to prevent
+ * signals being missed in calls to _select:
+ */
+ if (__sys_pipe(_thread_kern_pipe) != 0) {
+ /* Cannot create pipe, so abort: */
+ PANIC("Cannot create kernel pipe");
+ }
+ /* Get the flags for the read pipe: */
+ else if ((flags = __sys_fcntl(_thread_kern_pipe[0], F_GETFL, NULL)) == -1) {
+ /* Abort this application: */
+ PANIC("Cannot get kernel read pipe flags");
+ }
+ /* Make the read pipe non-blocking: */
+ else if (__sys_fcntl(_thread_kern_pipe[0], F_SETFL, flags | O_NONBLOCK) == -1) {
+ /* Abort this application: */
+ PANIC("Cannot make kernel read pipe non-blocking");
+ }
+ /* Get the flags for the write pipe: */
+ else if ((flags = __sys_fcntl(_thread_kern_pipe[1], F_GETFL, NULL)) == -1) {
+ /* Abort this application: */
+ PANIC("Cannot get kernel write pipe flags");
+ }
+ /* Make the write pipe non-blocking: */
+ else if (__sys_fcntl(_thread_kern_pipe[1], F_SETFL, flags | O_NONBLOCK) == -1) {
+ /* Abort this application: */
+ PANIC("Cannot get kernel write pipe flags");
+ }
+ /* Allocate and initialize the ready queue: */
+ else 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: */
+ _setjmp(_thread_kern_sched_jb);
+ SET_STACK_JB(_thread_kern_sched_jb, _thread_kern_sched_stack +
+ SCHED_STACK_SIZE - sizeof(double));
+ SET_RETURN_ADDR_JB(_thread_kern_sched_jb, _thread_kern_scheduler);
+
+ /*
+ * 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;
+
+ /* 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;
+
+ /* Initialize the initial context: */
+ _thread_initial->curframe = NULL;
+
+ /* Initialise the rest of the fields: */
+ _thread_initial->poll_data.nfds = 0;
+ _thread_initial->poll_data.fds = NULL;
+ _thread_initial->sig_defer_count = 0;
+ _thread_initial->yield_on_sig_undefer = 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);
+
+ /* Initialise the global signal action structure: */
+ sigfillset(&act.sa_mask);
+ act.sa_handler = (void (*) ()) _thread_sig_handler;
+ act.sa_flags = SA_SIGINFO | SA_ONSTACK;
+
+ /* Clear pending signals for the process: */
+ sigemptyset(&_process_sigpending);
+
+ /* Clear the signal queue: */
+ memset(_thread_sigq, 0, sizeof(_thread_sigq));
+
+ /* 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) {
+ }
+
+ /* Get the signal handler details: */
+ else if (__sys_sigaction(i, NULL,
+ &_thread_sigact[i - 1]) != 0) {
+ /*
+ * Abort this process if signal
+ * initialisation fails:
+ */
+ PANIC("Cannot read signal handler info");
+ }
+
+ /* Initialize the SIG_DFL dummy handler count. */
+ _thread_dfl_count[i] = 0;
+ }
+
+ /*
+ * Install the signal handler for the most important
+ * signals that the user-thread kernel needs. Actually
+ * SIGINFO isn't really needed, but it is nice to have.
+ */
+ if (__sys_sigaction(_SCHED_SIGNAL, &act, NULL) != 0 ||
+ __sys_sigaction(SIGINFO, &act, NULL) != 0 ||
+ __sys_sigaction(SIGCHLD, &act, NULL) != 0) {
+ /*
+ * Abort this process if signal initialisation fails:
+ */
+ PANIC("Cannot initialise signal handler");
+ }
+ _thread_sigact[_SCHED_SIGNAL - 1].sa_flags = SA_SIGINFO;
+ _thread_sigact[SIGINFO - 1].sa_flags = SA_SIGINFO;
+ _thread_sigact[SIGCHLD - 1].sa_flags = SA_SIGINFO;
+
+ /* Get the process signal mask: */
+ __sys_sigprocmask(SIG_SETMASK, NULL, &_process_sigmask);
+
+ /* 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;
+
+ /* Get the table size: */
+ if ((_thread_dtablesize = getdtablesize()) < 0) {
+ /*
+ * Cannot get the system defined table size, so abort
+ * this process.
+ */
+ PANIC("Cannot get dtablesize");
+ }
+ /* Allocate memory for the file descriptor table: */
+ if ((_thread_fd_table = (struct fd_table_entry **) malloc(sizeof(struct fd_table_entry *) * _thread_dtablesize)) == NULL) {
+ /* Avoid accesses to file descriptor table on exit: */
+ _thread_dtablesize = 0;
+
+ /*
+ * Cannot allocate memory for the file descriptor
+ * table, so abort this process.
+ */
+ PANIC("Cannot allocate memory for file descriptor table");
+ }
+ /* Allocate memory for the pollfd table: */
+ if ((_thread_pfd_table = (struct pollfd *) malloc(sizeof(struct pollfd) * _thread_dtablesize)) == NULL) {
+ /*
+ * Cannot allocate memory for the file descriptor
+ * table, so abort this process.
+ */
+ PANIC("Cannot allocate memory for pollfd table");
+ } else {
+ /*
+ * Enter a loop to initialise the file descriptor
+ * table:
+ */
+ for (i = 0; i < _thread_dtablesize; i++) {
+ /* Initialise the file descriptor table: */
+ _thread_fd_table[i] = NULL;
+ }
+
+ /* Initialize stdio file descriptor table entries: */
+ for (i = 0; i < 3; i++) {
+ if ((_thread_fd_table_init(i) != 0) &&
+ (errno != EBADF))
+ PANIC("Cannot initialize stdio file "
+ "descriptor table entry");
+ }
+ }
+ }
+
+ /* 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
generated by cgit v1.2.3 (git 2.25.1) at 2025-10-31 23:16:31 +0000