freebsd-dev/lib/libthr/thread/thr_syscalls.c
Mike Makonnen 8bd3b0415b o Since we're not using signals for thread synchronization anymore,
sigprocmask no longer needs to be wrapped.
o raise(3) is applied to the calling thread in a threaded program.
o In the sigaction wrapper reference the correct structure.
o Don't treat SIGTHR especially anymore (infact it won't exist in
  a little while).
2004-03-27 15:05:28 +00:00

500 lines
11 KiB
C

/*
* Copyright (c) 2000 Jason Evans <jasone@freebsd.org>.
* Copyright (c) 2002 Daniel M. Eischen <deischen@freebsd.org>
* Copyright (c) 2003 Jeff Roberson <jeff@freebsd.org>
* 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(s), this list of conditions and the following disclaimer as
* the first lines of this file unmodified other than the possible
* addition of one or more copyright notices.
* 2. Redistributions in binary form must reproduce the above copyright
* notice(s), this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) ``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 COPYRIGHT HOLDER(S) 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.
*
* $FreeBSD$
*/
/*
* 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.
*
*/
#include <sys/cdefs.h>
#include <sys/fcntl.h>
#include <sys/mman.h>
#include <sys/param.h>
#include <sys/select.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/uio.h>
#include <sys/wait.h>
#include <aio.h>
#include <dirent.h>
#include <errno.h>
#include <fcntl.h>
#include <poll.h>
#include <pthread.h>
#include <signal.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <termios.h>
#include <unistd.h>
#include "thr_private.h"
extern int __creat(const char *, mode_t);
extern int __sleep(unsigned int);
extern int __sys_nanosleep(const struct timespec *, struct timespec *);
extern int __sys_select(int, fd_set *, fd_set *, fd_set *, struct timeval *);
extern int __sys_sigaction(int, const struct sigaction *, struct sigaction *);
extern int __system(const char *);
extern int __tcdrain(int);
extern pid_t __wait(int *);
extern pid_t __sys_wait4(pid_t, int *, int, struct rusage *);
extern pid_t __waitpid(pid_t, int *, int);
__weak_reference(_aio_suspend, aio_suspend);
int
_aio_suspend(const struct aiocb * const iocbs[], int niocb, const struct
timespec *timeout)
{
int ret;
_thread_enter_cancellation_point();
ret = __sys_aio_suspend(iocbs, niocb, timeout);
_thread_leave_cancellation_point();
return ret;
}
__weak_reference(_close, close);
int
_close(int fd)
{
int ret;
_thread_enter_cancellation_point();
ret = __sys_close(fd);
_thread_leave_cancellation_point();
return ret;
}
__weak_reference(_creat, creat);
int
_creat(const char *path, mode_t mode)
{
int ret;
_thread_enter_cancellation_point();
ret = __creat(path, mode);
_thread_leave_cancellation_point();
return ret;
}
__weak_reference(_fcntl, fcntl);
int
_fcntl(int fd, int cmd,...)
{
int ret;
va_list ap;
_thread_enter_cancellation_point();
va_start(ap, cmd);
switch (cmd) {
case F_DUPFD:
case F_SETFD:
case F_SETFL:
ret = __sys_fcntl(fd, cmd, va_arg(ap, int));
break;
case F_GETFD:
case F_GETFL:
ret = __sys_fcntl(fd, cmd);
break;
default:
ret = __sys_fcntl(fd, cmd, va_arg(ap, void *));
}
va_end(ap);
_thread_leave_cancellation_point();
return ret;
}
__weak_reference(_fsync, fsync);
int
_fsync(int fd)
{
int ret;
_thread_enter_cancellation_point();
ret = __sys_fsync(fd);
_thread_leave_cancellation_point();
return ret;
}
__weak_reference(_msync, msync);
int
_msync(void *addr, size_t len, int flags)
{
int ret;
_thread_enter_cancellation_point();
ret = __sys_msync(addr, len, flags);
_thread_leave_cancellation_point();
return ret;
}
__weak_reference(_nanosleep, nanosleep);
int
_nanosleep(const struct timespec * time_to_sleep, struct timespec *
time_remaining)
{
int ret;
_thread_enter_cancellation_point();
ret = __sys_nanosleep(time_to_sleep, time_remaining);
_thread_leave_cancellation_point();
return ret;
}
__weak_reference(_open, open);
int
_open(const char *path, int flags,...)
{
int ret;
int mode = 0;
va_list ap;
_thread_enter_cancellation_point();
/* Check if the file is being created: */
if (flags & O_CREAT) {
/* Get the creation mode: */
va_start(ap, flags);
mode = va_arg(ap, int);
va_end(ap);
}
ret = __sys_open(path, flags, mode);
_thread_leave_cancellation_point();
return ret;
}
__weak_reference(_poll, poll);
int
_poll(struct pollfd *fds, unsigned int nfds, int timeout)
{
int ret;
_thread_enter_cancellation_point();
ret = __sys_poll(fds, nfds, timeout);
_thread_leave_cancellation_point();
return ret;
}
extern int __pselect(int count, fd_set *rfds, fd_set *wfds, fd_set *efds,
const struct timespec *timo, const sigset_t *mask);
int
pselect(int count, fd_set *rfds, fd_set *wfds, fd_set *efds,
const struct timespec *timo, const sigset_t *mask)
{
int ret;
_thread_enter_cancellation_point();
ret = __pselect(count, rfds, wfds, efds, timo, mask);
_thread_leave_cancellation_point();
return (ret);
}
__weak_reference(_raise, raise);
int
_raise(int sig)
{
int error;
error = pthread_kill(pthread_self(), sig);
if (error != 0) {
errno = error;
error = -1;
}
return (error);
}
__weak_reference(_read, read);
ssize_t
_read(int fd, void *buf, size_t nbytes)
{
ssize_t ret;
_thread_enter_cancellation_point();
ret = __sys_read(fd, buf, nbytes);
_thread_leave_cancellation_point();
return ret;
}
__weak_reference(_readv, readv);
ssize_t
_readv(int fd, const struct iovec *iov, int iovcnt)
{
ssize_t ret;
_thread_enter_cancellation_point();
ret = __sys_readv(fd, iov, iovcnt);
_thread_leave_cancellation_point();
return ret;
}
__weak_reference(_select, select);
int
_select(int numfds, fd_set *readfds, fd_set *writefds, fd_set *exceptfds,
struct timeval *timeout)
{
int ret;
_thread_enter_cancellation_point();
ret = __sys_select(numfds, readfds, writefds, exceptfds, timeout);
_thread_leave_cancellation_point();
return ret;
}
__weak_reference(_sigaction, sigaction);
int
_sigaction(int sig, const struct sigaction *act, struct sigaction *oact)
{
struct sigaction *tmpact;
struct sigaction oldact, wrapperact;
int error;
/* Detect invalid signals. */
if (sig < 1 || sig > NSIG) {
errno = EINVAL;
return (-1);
}
/*
* If act is not NULL the library's signal wrapper is passed into the
* kernel only if the action is not SIG_DFL or SIG_IGN.
* On the other hand if act is NULL the caller only wants
* the old value so there is no need to call into the kernel.
*/
error = 0;
tmpact = NULL;
proc_sigact_copyout(sig, &oldact);
if (act != NULL) {
proc_sigact_copyin(sig, act);
tmpact = proc_sigact_sigaction(sig);
if (tmpact->sa_handler != SIG_DFL &&
tmpact->sa_handler != SIG_IGN) {
bcopy((const void *)tmpact, (void *)&wrapperact,
sizeof(struct sigaction));
wrapperact.sa_flags |= SA_SIGINFO;
wrapperact.sa_sigaction = &_thread_sig_wrapper;
tmpact = &wrapperact;
}
error = __sys_sigaction(sig, tmpact, NULL);
}
if (error == 0) {
/* If successful, return the old sigaction to the user */
if (oact != NULL )
bcopy((const void *)&oldact, (void *)oact,
sizeof(struct sigaction));
} else {
/*
* The only time error is non-zero is if the syscall failed,
* which means the sigaction in the process global list
* was altered before the syscall. Return it to it's old value.
*/
proc_sigact_copyin(sig, &oldact);
}
return (error);
}
__weak_reference(_sleep, sleep);
unsigned int
_sleep(unsigned int seconds)
{
unsigned int ret;
_thread_enter_cancellation_point();
ret = __sleep(seconds);
_thread_leave_cancellation_point();
return ret;
}
__weak_reference(_system, system);
int
_system(const char *string)
{
int ret;
_thread_enter_cancellation_point();
ret = __system(string);
_thread_leave_cancellation_point();
return ret;
}
__weak_reference(_tcdrain, tcdrain);
int
_tcdrain(int fd)
{
int ret;
_thread_enter_cancellation_point();
ret = __tcdrain(fd);
_thread_leave_cancellation_point();
return ret;
}
__weak_reference(_wait, wait);
pid_t
_wait(int *istat)
{
pid_t ret;
_thread_enter_cancellation_point();
ret = __wait(istat);
_thread_leave_cancellation_point();
return ret;
}
__weak_reference(_wait4, wait4);
pid_t
_wait4(pid_t pid, int *istat, int options, struct rusage *rusage)
{
pid_t ret;
_thread_enter_cancellation_point();
ret = __sys_wait4(pid, istat, options, rusage);
_thread_leave_cancellation_point();
return ret;
}
__weak_reference(_waitpid, waitpid);
pid_t
_waitpid(pid_t wpid, int *status, int options)
{
pid_t ret;
_thread_enter_cancellation_point();
ret = __waitpid(wpid, status, options);
_thread_leave_cancellation_point();
return ret;
}
__weak_reference(_write, write);
ssize_t
_write(int fd, const void *buf, size_t nbytes)
{
ssize_t ret;
_thread_enter_cancellation_point();
ret = __sys_write(fd, buf, nbytes);
_thread_leave_cancellation_point();
return ret;
}
__weak_reference(_writev, writev);
ssize_t
_writev(int fd, const struct iovec *iov, int iovcnt)
{
ssize_t ret;
_thread_enter_cancellation_point();
ret = __sys_writev(fd, iov, iovcnt);
_thread_leave_cancellation_point();
return ret;
}