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newlib-cygwin
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* cygtls.cc (_threadinfo::remove): Don't assume that we are removing _my_tls. 

* exceptions.cc (setup_handler): Improve debugging output.
(call_signal_handler_now): Remove ill-advised debugger call.
* sigproc.cc (sigcomplete_main): Delete.
(sig_send): Honor FIXME and avoid using main thread's completion event for
everything or suffer races.
(pending_signals::add): Default stored mask to current process mask rather than
mask at time of signal send.
(wait_sig): Add debugging output.
* sigproc.h (sigpacket::mask_storage): Delete.
This commit is contained in:
Christopher Faylor 2004-01-22 19:03:19 +00:00
parent 537ca63f8e
commit 39d06d71ff
5 changed files with 38 additions and 27 deletions
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14
winsup/cygwin/ChangeLog
View File

@ -1,3 +1,17 @@
2004-01-22 Christopher Faylor <cgf@redhat.com>
* cygtls.cc (_threadinfo::remove): Don't assume that we are removing
_my_tls.
* exceptions.cc (setup_handler): Improve debugging output.
(call_signal_handler_now): Remove ill-advised debugger call.
* sigproc.cc (sigcomplete_main): Delete.
(sig_send): Honor FIXME and avoid using main thread's completion event
for everything or suffer races.
(pending_signals::add): Default stored mask to current process mask
rather than mask at time of signal send.
(wait_sig): Add debugging output.
* sigproc.h (sigpacket::mask_storage): Delete.
2004-01-22 Christopher Faylor <cgf@redhat.com>
* fhandler.cc (fhandler_base::open): Revert isfs change.

3
winsup/cygwin/cygtls.cc
View File

@ -140,10 +140,11 @@ _threadinfo::remove (DWORD wait)
if (here.acquired ())
{
for (size_t i = 0; i < nthreads; i++)
if (&_my_tls == cygheap->threadlist[i])
if (this == cygheap->threadlist[i])
{
if (i < --nthreads)
cygheap->threadlist[i] = cygheap->threadlist[nthreads];
debug_printf ("removed %p element %d", this, i);
break;
}
}

8
winsup/cygwin/exceptions.cc
View File

@ -744,7 +744,11 @@ setup_handler (int sig, void *handler, struct sigaction& siga, _threadinfo *tls)
bool interrupted = false;
if (tls->sig)
{
sigproc_printf ("trying to send sig %d but signal %d already armed",
sig, tls->sig);
goto out;
}
for (int i = 0; i < CALL_HANDLER_RETRY; i++)
{
@ -1141,10 +1145,6 @@ call_signal_handler_now ()
void (*sigfunc) (int) = _my_tls.func;
(void) _my_tls.pop ();
#ifdef DEBUGGING
if (_my_tls.stackptr > (_my_tls.stack + 1))
try_to_debug ();
#endif
reset_signal_arrived ();
sigset_t oldmask = _my_tls.oldmask;
int this_errno = _my_tls.saved_errno;

33
winsup/cygwin/sigproc.cc
View File

@ -114,9 +114,6 @@ HANDLE NO_COPY signal_arrived; // Event signaled when a signal has
Static DWORD proc_loop_wait = 1000; // Wait for subprocesses to exit
Static HANDLE sigcomplete_main; // Event signaled when a signal has
// finished processing for the main
// thread
HANDLE NO_COPY sigCONT; // Used to "STOP" a process
Static cygthread *hwait_sig; // Handle of wait_sig thread
Static cygthread *hwait_subproc; // Handle of sig_subproc thread
@ -646,7 +643,6 @@ sigproc_terminate (void)
{
sigproc_printf ("entering");
// finished with anything it is doing
ForceCloseHandle (sigcomplete_main);
if (!hExeced)
{
HANDLE sendsig = myself->sendsig;
@ -681,8 +677,8 @@ sig_send (_pinfo *p, siginfo_t& si, _threadinfo *tls)
HANDLE sendsig;
sigpacket pack;
pack.wakeup = NULL;
bool wait_for_completion;
// FIXMENOW: Avoid using main thread's completion event!
if (!(its_me = (p == NULL || p == myself || p == myself_nowait)))
wait_for_completion = false;
else
@ -710,11 +706,7 @@ sig_send (_pinfo *p, siginfo_t& si, _threadinfo *tls)
}
if (its_me)
{
sendsig = myself->sendsig;
if (wait_for_completion)
pack.wakeup = sigcomplete_main;
}
else
{
HANDLE hp = OpenProcess (PROCESS_DUP_HANDLE, false, p->dwProcessId);
@ -756,7 +748,13 @@ sig_send (_pinfo *p, siginfo_t& si, _threadinfo *tls)
pack.si.si_uid = myself->uid;
pack.pid = myself->pid;
pack.tls = (_threadinfo *) tls;
pack.mask_storage = 0;
if (wait_for_completion)
{
pack.wakeup = CreateEvent (&sec_none_nih, FALSE, FALSE, NULL);
sigproc_printf ("wakeup %p", pack.wakeup);
ProtectHandle (pack.wakeup);
}
DWORD nb;
if (!WriteFile (sendsig, &pack, sizeof (pack), &nb, NULL) || nb != sizeof (pack))
{
@ -815,6 +813,9 @@ sig_send (_pinfo *p, siginfo_t& si, _threadinfo *tls)
call_signal_handler_now ();
out:
if (pack.wakeup)
ForceCloseHandle (pack.wakeup);
if (si.si_signo != __SIGPENDING)
/* nothing */;
else if (!rc)
@ -1028,8 +1029,7 @@ pending_signals::add (sigpacket& pack)
empty = 0;
se = sigs + empty;
*se = pack;
se->mask_storage = *(pack.mask);
se->mask = &se->mask_storage;
se->mask = &myself->getsigmask ();
se->next = NULL;
if (end)
end->next = se;
@ -1077,12 +1077,8 @@ wait_sig (VOID *self)
/* Initialization */
(void) SetThreadPriority (GetCurrentThread (), WAIT_SIG_PRIORITY);
/* sigcomplete_main - event used to signal main thread on signal
completion */
if (!CreatePipe (&readsig, &myself->sendsig, sec_user_nih (sa_buf), 0))
api_fatal ("couldn't create signal pipe, %E");
sigcomplete_main = CreateEvent (&sec_none_nih, FALSE, FALSE, NULL);
sigproc_printf ("sigcomplete_main %p", sigcomplete_main);
sigCONT = CreateEvent (&sec_none_nih, FALSE, FALSE, NULL);
/* Setting dwProcessId flags that this process is now capable of receiving
@ -1093,8 +1089,6 @@ wait_sig (VOID *self)
myself->process_state |= PID_ACTIVE;
myself->process_state &= ~PID_INITIALIZING;
ProtectHandle (sigcomplete_main);
/* If we've been execed, then there is still a stub left in the previous
windows process waiting to see if it's started a cygwin process or not.
Signalling subproc_ready indicates that we are a cygwin process. */
@ -1193,7 +1187,10 @@ wait_sig (VOID *self)
break;
}
if (pack.wakeup)
{
SetEvent (pack.wakeup);
sigproc_printf ("signalled %p", pack.wakeup);
}
}
sigproc_printf ("done");

1
winsup/cygwin/sigproc.h
View File

@ -55,7 +55,6 @@ struct sigpacket
pid_t pid;
class _threadinfo *tls;
sigset_t *mask;
sigset_t mask_storage;
union
{
HANDLE wakeup;