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Make sigaltstack as per-threaded, because per-process sigaltstack state

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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.
This commit is contained in:
davidxu 2004-01-03 23:31:29 +00:00
parent a1134bb184
commit cc1239c8c2
1 changed files with 2 additions and 2 deletions
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4
sys/i386/linux/linux_sysvec.c
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@ -354,8 +354,8 @@ linux_rt_sendsig(sig_t catcher, int sig, sigset_t *mask, u_long code)
#ifdef DEBUG
if (ldebug(rt_sendsig))
printf(LMSG("rt_sendsig flags: 0x%x, sp: %p, ss: 0x%x, mask: 0x%x"),
frame.sf_sc.uc_stack.ss_flags, p->p_sigstk.ss_sp,
p->p_sigstk.ss_size, frame.sf_sc.uc_mcontext.sc_mask);
frame.sf_sc.uc_stack.ss_flags, td->td_sigstk.ss_sp,
td->td_sigstk.ss_size, frame.sf_sc.uc_mcontext.sc_mask);
#endif
if (copyout(&frame, fp, sizeof(frame)) != 0) {