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* sigproc.cc (proc_exists): A zombie process does not exist. 

(sig_send): Improve debugging output.  Wait for pipe to be created before
trying to send to it.  Call call_signal_handler_now if sending a signal to
myself.
This commit is contained in:
Christopher Faylor 2003-11-23 05:34:00 +00:00
parent c026d84209
commit 0670609d12
2 changed files with 22 additions and 7 deletions
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7
winsup/cygwin/ChangeLog
View File

@ -1,3 +1,10 @@
2003-11-23 Christopher Faylor <cgf@redhat.com>
* sigproc.cc (proc_exists): A zombie process does not exist.
(sig_send): Improve debugging output. Wait for pipe to be created
before trying to send to it. Call call_signal_handler_now if sending a
signal to myself.
2003-11-22 Christopher Faylor <cgf@redhat.com>
* dcrt0.cc (check_sanity_and_sync): Correct api major version check so

22
winsup/cygwin/sigproc.cc
View File

@ -1,8 +1,8 @@
/* sigproc.cc: inter/intra signal and sub process handler
Copyright 1997, 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.
Copyright 1997, 1998, 1999, 2000, 2001, 2002, 2003 Red Hat, Inc.
Written by Christopher Faylor <cgf@cygnus.com>
Written by Christopher Faylor
This file is part of Cygwin.
@ -44,7 +44,7 @@ details. */
#define wake_wait_subproc() SetEvent (events[0])
#define no_signals_available() (!hwait_sig || !sig_loop_wait)
#define no_signals_available() (!hwait_sig || !sig_loop_wait && !exit_state)
#define NZOMBIES 256
@ -267,7 +267,7 @@ pid_exists (pid_t pid)
BOOL __stdcall
proc_exists (_pinfo *p)
{
return p && !(p->process_state & PID_EXITED);
return p && !(p->process_state & (PID_EXITED | PID_ZOMBIE));
}
/* Return 1 if this is one of our children, zero otherwise.
@ -428,9 +428,8 @@ proc_subproc (DWORD what, DWORD val)
goto scan_wait;
/* Clear all waiting threads. Called from exceptions.cc prior to
* the main thread's dispatch to a signal handler function.
* (called from wait_sig thread)
*/
the main thread's dispatch to a signal handler function.
(called from wait_sig thread) */
case PROC_CLEARWAIT:
/* Clear all "wait"ing threads. */
if (val)
@ -707,15 +706,20 @@ sig_send (_pinfo *p, int sig, DWORD ebp, bool exception)
HANDLE hp = OpenProcess (PROCESS_DUP_HANDLE, false, p->dwProcessId);
if (!hp)
{
sigproc_printf ("OpenProcess failed, %E");
__seterrno ();
goto out;
}
for (int i = 0; !p->sendsig && i < 10000; i++)
low_priority_sleep (0);
if (!DuplicateHandle (hp, p->sendsig, hMainProc, &sendsig, false, 0,
DUPLICATE_SAME_ACCESS) || !sendsig)
{
sigproc_printf ("DuplicateHandle failed, %E");
__seterrno ();
goto out;
}
CloseHandle (hp);
pack.wakeup = NULL;
}
@ -738,6 +742,7 @@ sig_send (_pinfo *p, int sig, DWORD ebp, bool exception)
process is exiting. */
if (!its_me)
{
sigproc_printf ("WriteFile for pipe %p failed, %E", sendsig);
__seterrno ();
ForceCloseHandle (sendsig);
}
@ -784,6 +789,9 @@ sig_send (_pinfo *p, int sig, DWORD ebp, bool exception)
rc = -1;
}
if (wait_for_completion)
call_signal_handler_now ();
out:
if (sig != __SIGPENDING)
/* nothing */;