fabe2820c0
in the set of signals to block. Also, make the PANIC macro call abort() instead of simply exiting.
384 lines
10 KiB
C
384 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"
|
|
|
|
/*
|
|
* Early implementations of sigtimedwait interpreted the signal
|
|
* set incorrectly.
|
|
*/
|
|
#define SIGTIMEDWAIT_SET_IS_INVERTED(osreldate) \
|
|
((500100 <= (osreldate) && (osreldate) <= 500113) || \
|
|
(osreldate) == 501000 || (osreldate) == 501100)
|
|
|
|
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;
|
|
|
|
/*
|
|
* Threaded process initialization
|
|
*/
|
|
void
|
|
_thread_init(void)
|
|
{
|
|
struct pthread *pthread;
|
|
int fd;
|
|
int i;
|
|
size_t len;
|
|
int mib[2];
|
|
sigset_t set;
|
|
int osreldate;
|
|
int error;
|
|
|
|
struct clockinfo clockinfo;
|
|
struct sigaction act;
|
|
|
|
/* 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");
|
|
}
|
|
/* Zero the initial thread structure: */
|
|
memset(pthread, 0, sizeof(struct pthread));
|
|
|
|
_thread_initial = pthread;
|
|
pthread->arch_id = _set_curthread(NULL, pthread, &error);
|
|
|
|
/* Get our thread id. */
|
|
thr_self(&pthread->thr_id);
|
|
|
|
/* Give this thread default attributes: */
|
|
memcpy((void *) &pthread->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. */
|
|
pthread->stack = _usrstack - PTHREAD_STACK_INITIAL;
|
|
|
|
/* Set the stack attributes. */
|
|
pthread->attr.stackaddr_attr = pthread->stack;
|
|
pthread->attr.stacksize_attr = PTHREAD_STACK_INITIAL;
|
|
|
|
/*
|
|
* Write a magic value to the thread structure
|
|
* to help identify valid ones:
|
|
*/
|
|
pthread->magic = PTHREAD_MAGIC;
|
|
|
|
/* Set the initial cancel state */
|
|
pthread->cancelflags = PTHREAD_CANCEL_ENABLE | PTHREAD_CANCEL_DEFERRED;
|
|
|
|
/* 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;
|
|
|
|
/* Default the priority of the initial thread: */
|
|
pthread->base_priority = PTHREAD_DEFAULT_PRIORITY;
|
|
pthread->active_priority = PTHREAD_DEFAULT_PRIORITY;
|
|
pthread->inherited_priority = 0;
|
|
|
|
/* Initialise the state of the initial thread: */
|
|
pthread->state = PS_RUNNING;
|
|
|
|
/* Set the name of the thread: */
|
|
pthread->name = strdup("_thread_initial");
|
|
|
|
/* Initialize joiner to NULL (no joiner): */
|
|
pthread->joiner = NULL;
|
|
|
|
/* Initialize the owned mutex queue and count: */
|
|
TAILQ_INIT(&(pthread->mutexq));
|
|
pthread->priority_mutex_count = 0;
|
|
|
|
/* Initialise the rest of the fields: */
|
|
pthread->specific = NULL;
|
|
pthread->cleanup = NULL;
|
|
pthread->flags = 0;
|
|
pthread->error = 0;
|
|
TAILQ_INIT(&_thread_list);
|
|
TAILQ_INSERT_HEAD(&_thread_list, pthread, tle);
|
|
|
|
/* 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");
|
|
}
|
|
act.sa_sigaction = _thread_sig_wrapper;
|
|
act.sa_flags = SA_SIGINFO;
|
|
SIGFILLSET(act.sa_mask);
|
|
|
|
if (__sys_sigaction(SIGTHR, &act, NULL))
|
|
PANIC("Cannot set SIGTHR handler.\n");
|
|
|
|
SIGEMPTYSET(set);
|
|
SIGADDSET(set, SIGTHR);
|
|
__sys_sigprocmask(SIG_BLOCK, &set, 0);
|
|
|
|
/*
|
|
* Precompute the signal set used by _thread_suspend to wait
|
|
* for SIGTHR.
|
|
*/
|
|
mib[0] = CTL_KERN;
|
|
mib[1] = KERN_OSRELDATE;
|
|
len = sizeof(osreldate);
|
|
if (sysctl(mib, 2, &osreldate, &len, NULL, 0) == 0 &&
|
|
SIGTIMEDWAIT_SET_IS_INVERTED(osreldate)) {
|
|
/* Kernel bug requires an inverted signal set. */
|
|
SIGFILLSET(_thread_suspend_sigset);
|
|
SIGDELSET(_thread_suspend_sigset, SIGTHR);
|
|
} else {
|
|
SIGEMPTYSET(_thread_suspend_sigset);
|
|
SIGADDSET(_thread_suspend_sigset, SIGTHR);
|
|
}
|
|
#ifdef _PTHREADS_INVARIANTS
|
|
SIGADDSET(_thread_suspend_sigset, SIGALRM);
|
|
#endif
|
|
|
|
/* 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(&dead_list_lock,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
|