diff options
| author | davidxu <davidxu@FreeBSD.org> | 2004-01-03 23:36:31 +0000 |
|---|---|---|
| committer | davidxu <davidxu@FreeBSD.org> | 2004-01-03 23:36:31 +0000 |
| commit | a6c2fc0f084fd2638d9cf79470bc3cc4f7c62c2d (patch) | |
| tree | ae40cb69bb891cfb0e658f4674d401729fc7a079 | |
| parent | d72ded3ec8fc51eb854beabed52ae30e359bed23 (diff) | |
| download | FreeBSD-src-a6c2fc0f084fd2638d9cf79470bc3cc4f7c62c2d.zip FreeBSD-src-a6c2fc0f084fd2638d9cf79470bc3cc4f7c62c2d.tar.gz | |
Make sigaltstack as per-threaded, because per-process sigaltstack state
is useless for threaded programs, multiple threads can not share same
stack.
The alternative signal stack is private for thread, no lock is needed,
the orignal P_ALTSTACK is now moved into td_pflags and renamed to
TDP_ALTSTACK.
For single thread or Linux clone() based threaded program, there is no
semantic changed, because those programs only have one kernel thread
in every process.
| -rw-r--r-- | sys/alpha/osf1/osf1_signal.c | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/sys/alpha/osf1/osf1_signal.c b/sys/alpha/osf1/osf1_signal.c index d318a55..0aecf01 100644 --- a/sys/alpha/osf1/osf1_signal.c +++ b/sys/alpha/osf1/osf1_signal.c @@ -485,11 +485,11 @@ osf1_sendsig(sig_t catcher, int sig, sigset_t *mask, u_long code) * and the useracc() check will fail if the process has not already * allocated the space with a `brk'. */ - if ((p->p_flag & P_ALTSTACK) && !oonstack && + if ((td->td_pflags & TDP_ALTSTACK) && !oonstack && SIGISMEMBER(psp->ps_sigonstack, sig)) { - sip = (osiginfo_t *)((caddr_t)p->p_sigstk.ss_sp + - p->p_sigstk.ss_size - rndfsize); - p->p_sigstk.ss_flags |= SS_ONSTACK; + sip = (osiginfo_t *)((caddr_t)td->td_sigstk.ss_sp + + td->td_sigstk.ss_size - rndfsize); + td->td_sigstk.ss_flags |= SS_ONSTACK; } else sip = (osiginfo_t *)(alpha_pal_rdusp() - rndfsize); mtx_unlock(&psp->ps_mtx); @@ -588,9 +588,9 @@ osf1_sigreturn(struct thread *td, */ PROC_LOCK(p); if (ksc.sc_onstack) - p->p_sigstk.ss_flags |= SS_ONSTACK; + td->td_sigstk.ss_flags |= SS_ONSTACK; else - p->p_sigstk.ss_flags &= ~SS_ONSTACK; + td->td_sigstk.ss_flags &= ~SS_ONSTACK; /* * longjmp is still implemented by calling osigreturn. The new |
