Messages in this thread | | | Date | Wed, 24 Nov 2004 18:45:05 -0800 | From | George Anzinger <> | Subject | Re: nanosleep interrupted by ignored signals |
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Matt Mackall wrote: > Take the following trivial program: > > #include <unistd.h> > > int main(void) > { > sleep(10); > return 0; > } > > Run it in an xterm. Note that resizing the xterm has no effect on the > process. Now do the same with strace: > > brk(0x80495bc) = 0x80495bc > brk(0x804a000) = 0x804a000 > rt_sigprocmask(SIG_BLOCK, [CHLD], [], 8) = 0 > rt_sigaction(SIGCHLD, NULL, {SIG_DFL}, 8) = 0 > rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 > nanosleep({10, 0}, 0xbffff548) = -1 EINTR (Interrupted system > call) > --- SIGWINCH (Window changed) --- > _exit(0) = ? > > In short, nanosleep is getting interrupted by signals that are > supposedly ignored when a process is being praced. This appears to be > a long-standing bug. > > It also appears to be a long-known bug. I found some old discussion of this > problem here but no sign of any resolution: > > http://www.ussg.iu.edu/hypermail/linux/kernel/0108.1/1448.html > > What's the current thinking on this?
This should have been resolved with the 2.6 changes, in particular, the restart code. What kernel are you using? >
-- George Anzinger george@mvista.com High-res-timers: http://sourceforge.net/projects/high-res-timers/
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