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* cygerrno.h (set_errno): Set global errno whenever setting thread specific

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version.
* debug.cc (__set_errno): Ditto.
* exceptions.cc (handle_sigsuspend): Remove spurious sig_dispatch_pending call.
(set_signal_mask): When there seem to be pending signals to dispatch, tell
signal_dispatch_pending/sig_send not to specifically call any handlers.
* sigproc.h (sig_dispatch_pending): Change declaration to void.
* sigproc.cc (sig_dispatch_pending): Change definition to void.  Take an
argument to determine whether to tell sig_send to wait for handler to be
called.
* sigproc.cc (sig_send): Don't call signal handler when sig == __SIGFLUSHFAST.
(wait_sig): Honor __SIGFLUSHFAST.  Guard against sigpacket::process nuking
si_signo.
* sigproc.h (__SIGFLUSHFAST): Define new special signal.
(sig_dispatch_pending): Change declaration to void.  Take optional boolean
argument.
* fork.cc (vfork): Add debugging output.
This commit is contained in:
Christopher Faylor
2004-02-01 18:29:12 +00:00
parent f6565cd1a6
commit 9e1ad59de6
7 changed files with 54 additions and 22 deletions
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27
winsup/cygwin/sigproc.cc
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@@ -63,7 +63,7 @@ public:
sigpacket *next ();
sigpacket *save () const {return curr;}
void restore (sigpacket *saved) {curr = saved;}
friend int __stdcall sig_dispatch_pending ();
friend void __stdcall sig_dispatch_pending (bool);
};
static pending_signals sigqueue;
@@ -431,8 +431,7 @@ proc_subproc (DWORD what, DWORD val)
scan_wait:
/* Scan the linked list of wait()ing threads. If a wait's parameters
* match this pid, then activate it.
*/
match this pid, then activate it. */
for (w = &waitq_head; w->next != NULL; w = w->next)
{
if ((potential_match = checkstate (w)) > 0)
@@ -567,8 +566,8 @@ sigpending (sigset_t *mask)
}
/* Force the wait_sig thread to wake up and scan for pending signals */
int __stdcall
sig_dispatch_pending ()
void __stdcall
sig_dispatch_pending (bool fast)
{
if (exit_state || GetCurrentThreadId () == sigtid || !sigqueue.start.next)
{
@@ -576,14 +575,13 @@ sig_dispatch_pending ()
sigproc_printf ("exit_state %d, cur thread id %p, sigtid %p, sigqueue.start.next %p",
exit_state, GetCurrentThreadId (), sigtid, sigqueue.start.next);
#endif
return 0;
return;
}
#ifdef DEBUGGING
sigproc_printf ("flushing");
#endif
(void) sig_send (myself, __SIGFLUSH);
return call_signal_handler_now ();
(void) sig_send (myself, fast ? __SIGFLUSHFAST : __SIGFLUSH);
}
/* Message initialization. Called from dll_crt0_1
@@ -800,6 +798,12 @@ sig_send (_pinfo *p, siginfo_t& si, _threadinfo *tls)
ForceCloseHandle (sendsig);
}
if (pack.wakeup)
{
ForceCloseHandle (pack.wakeup);
pack.wakeup = NULL;
}
if (rc == WAIT_OBJECT_0)
rc = 0; // Successful exit
else
@@ -811,13 +815,12 @@ sig_send (_pinfo *p, siginfo_t& si, _threadinfo *tls)
rc = -1;
}
if (wait_for_completion)
if (wait_for_completion && si.si_signo != __SIGFLUSHFAST)
call_signal_handler_now ();
out:
if (pack.wakeup)
ForceCloseHandle (pack.wakeup);
if (si.si_signo != __SIGPENDING)
/* nothing */;
else if (!rc)
@@ -1164,6 +1167,7 @@ wait_sig (VOID *self)
*pack.mask |= bit;
break;
case __SIGFLUSH:
case __SIGFLUSHFAST:
sigqueue.reset ();
while ((q = sigqueue.next ()))
if (q->si.si_signo == __SIGDELETE || q->process () > 0)
@@ -1174,6 +1178,7 @@ wait_sig (VOID *self)
sig_clear (-pack.si.si_signo);
else
{
int sig = pack.si.si_signo;
int sigres = pack.process ();
if (sigres <= 0)
{
@@ -1183,7 +1188,7 @@ wait_sig (VOID *self)
#endif
sigqueue.add (pack); // FIXME: Shouldn't add this in !sh condition
}
if (pack.si.si_signo == SIGCHLD)
if (sig == SIGCHLD)
proc_subproc (PROC_CLEARWAIT, 0);
}
break;