diff options
Diffstat (limited to 'mit-pthreads/patches/p153')
| -rwxr-xr-x | mit-pthreads/patches/p153 | 90 |
1 files changed, 0 insertions, 90 deletions
diff --git a/mit-pthreads/patches/p153 b/mit-pthreads/patches/p153 deleted file mode 100755 index 4e374e29a10..00000000000 --- a/mit-pthreads/patches/p153 +++ /dev/null @@ -1,90 +0,0 @@ -<HEAD><TITLE>discuss@charon.mit.edu: [153] in "Pthreads Bugs"</TITLE> -<H1>[153] in Pthreads Bugs</H1></HEAD> -<A HREF="/"><IMG SRC="/i-d.gif" ALT="root"></A> -<A HREF="?153"><IMG SRC="/i-back.gif" ALT="meeting"></A> -<A HREF="/help.html"><IMG SRC="/i-help.gif" ALT="help"></A> -<A HREF="1"><IMG SRC="/i-first.gif" ALT="first"></A> -<A HREF="151"><IMG SRC="/i-fref.gif" ALT="first in chain"></A> -<A HREF="152"><IMG SRC="/i-pref.gif" ALT="previous in chain"></A> -<A HREF="152"><IMG SRC="/i-prev.gif" ALT="previous"></A> -<A HREF="154"><IMG SRC="/i-next.gif" ALT="next"></A> -<IMG SRC="/n-nref.gif" ALT=""> -<IMG SRC="/n-lref.gif" ALT=""> -<A HREF="161"><IMG SRC="/i-last.gif" ALT="last"></A> -<HR><H2>Re: sleep / SIGALRM problem in 1_60_beta6</H2> -<H3>daemon@ATHENA.MIT.EDU (Mon Dec 9 19:32:22 1996 -)</H3> -<PRE> -Date: Mon, 09 Dec 1996 17:22:50 -0700 -From: "Mark M. Evans" <mevans@cti-ltd.com> -To: Tim Hinderliter <kyd@internap.com> -Cc: pthreads-bugs@MIT.EDU - -I think I found what caused fd_kern_wait() to block for the entire -hour (instead of waking up due to the SIGALRM). Basically, the -SIGALRM that would move the sleeping thread to the run queue occurs -while pthread_kernel_lock is set, but *before* the critical section in -fd_kern_wait() that sets __fd_kern_wait_timeout.tv_sec to 3600. So, -sig_handler_real() clears __fd_kern_wait_timeout.tv_sec "too soon." - -I've worked around this by checking sig_to_process in the critical -section to determine if we are truly idle. To do this I had to make -sig_to_process publicly available. - -Here are the diffs (relative to the pthreads/pthreads directory): - -diff -c -r1.2 -r1.3 -*** signal.c 1996/11/20 05:09:50 1.2 ---- signal.c 1996/12/09 23:14:52 1.3 -*************** -*** 65,71 **** - */ - - static sig_atomic_t signum_to_process[SIGMAX + 1] = { 0, }; -! static sig_atomic_t sig_to_process = 0; - - /* static volatile sigset_t sig_to_process; */ - static volatile int sig_count = 0; ---- 65,71 ---- - */ - - static sig_atomic_t signum_to_process[SIGMAX + 1] = { 0, }; -! sig_atomic_t sig_to_process = 0; - - /* static volatile sigset_t sig_to_process; */ - static volatile int sig_count = 0; -*** fd_kern.c 1996/12/03 04:14:59 1.6 ---- fd_kern.c 1996/12/09 23:14:51 1.7 -*************** -*** 215,221 **** - * Called when there is no active thread to run. - */ - extern struct timeval __fd_kern_wait_timeout; -! - void fd_kern_wait() - { - fd_set fd_set_read, fd_set_write, fd_set_except; ---- 215,221 ---- - * Called when there is no active thread to run. - */ - extern struct timeval __fd_kern_wait_timeout; -! extern volatile sig_atomic_t sig_to_process; - void fd_kern_wait() - { - fd_set fd_set_read, fd_set_write, fd_set_except; -*************** -*** 254,260 **** - - machdep_unset_thread_timer(NULL); - __fd_kern_wait_timeout.tv_usec = 0; -! __fd_kern_wait_timeout.tv_sec = 3600; - - machdep_sys_sigprocmask(SIG_UNBLOCK, &sig_to_block, &oset); - ---- 254,260 ---- - - machdep_unset_thread_timer(NULL); - __fd_kern_wait_timeout.tv_usec = 0; -! __fd_kern_wait_timeout.tv_sec = (sig_to_process) ? 0 : 3600; - - machdep_sys_sigprocmask(SIG_UNBLOCK, &sig_to_block, &oset); |