359 lines
10 KiB
C
359 lines
10 KiB
C
/*
|
|
* 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 <pthread.h>
|
|
#include <signal.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
#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
|