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* pinfo.cc (pinfo_init): Cosmetic change: unset "destroy" for myself.

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(pinfo::wait): Change some comments.
(pinfo::prefork): Move a comment.
(pinfo::postfork): Set pending_*_pipe variables to NULL if closed.
(pinfo::postexec): Use right name when closing handle.
(_pinfo::alert_parent): Ditto.
* sigproc.h (hold_everything): Remove debugging label.
This commit is contained in:
Christopher Faylor 2012-03-20 02:08:14 +00:00
parent b0a905c5a0
commit e9a6f9c625
3 changed files with 28 additions and 8 deletions
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10
winsup/cygwin/ChangeLog
View File

@ -1,3 +1,13 @@
2012-03-19 Christopher Faylor <me.cygwin2012@cgf.cx>
* pinfo.cc (pinfo_init): Cosmetic change: unset "destroy" for myself.
(pinfo::wait): Change some comments.
(pinfo::prefork): Move a comment.
(pinfo::postfork): Set pending_*_pipe variables to NULL if closed.
(pinfo::postexec): Use right name when closing handle.
(_pinfo::alert_parent): Ditto.
* sigproc.h (hold_everything): Remove debugging label.
2012-03-19 Christopher Faylor <me.cygwin2012@cgf.cx>
* cygserver_ipc.h: Include sigproc.h for signal_arrived declaration.

21
winsup/cygwin/pinfo.cc
View File

@ -117,6 +117,7 @@ pinfo_init (char **envp, int envc)
myself->process_state |= PID_ACTIVE;
myself->process_state &= ~(PID_INITIALIZING | PID_EXITED | PID_REAPED);
myself.preserve ();
debug_printf ("pid %d, pgid %d", myself->pid, myself->pgid);
}
@ -933,6 +934,7 @@ proc_waiter (void *arg)
case __ALERT_ALIVE:
continue;
case 0:
debug_printf ("%d exited buf %d\n", vchild->pid, buf);
/* Child exited. Do some cleanup and signal myself. */
vchild.maybe_set_exit_code_from_windows ();
if (WIFEXITED (vchild->exitcode))
@ -987,11 +989,17 @@ proc_waiter (void *arg)
bool
pinfo::wait ()
{
/* If pending_rd_proc_pipe == NULL we're in an execed process which has
already grabbed the read end of the pipe from the previous cygwin process
running with this pid. */
if (pending_rd_proc_pipe)
{
/* Our end of the pipe, previously set in prefork() . */
rd_proc_pipe = pending_rd_proc_pipe;
pending_rd_proc_pipe = NULL;
/* This sets wr_proc_pipe in the child which, after the following
ForceCloseHandle1, will be only process with the handle open. */
wr_proc_pipe () = pending_wr_proc_pipe;
ForceCloseHandle1 (pending_wr_proc_pipe, wr_proc_pipe);
pending_wr_proc_pipe = NULL;
@ -1020,9 +1028,6 @@ pinfo::prefork (bool detached)
if (wr_proc_pipe () && wr_proc_pipe () != INVALID_HANDLE_VALUE
&& !SetHandleInformation (wr_proc_pipe (), HANDLE_FLAG_INHERIT, 0))
api_fatal ("couldn't set process pipe(%p) inherit state, %E", wr_proc_pipe ());
/* If rd_proc_pipe != NULL we're in an execed process which already has
grabbed the read end of the pipe from the previous cygwin process running
with this pid. */
if (!detached)
{
if (!CreatePipe (&pending_rd_proc_pipe, &pending_wr_proc_pipe,
@ -1046,16 +1051,22 @@ pinfo::postfork ()
HANDLE_FLAG_INHERIT))
api_fatal ("postfork: couldn't set process pipe(%p) inherit state, %E", wr_proc_pipe ());
if (pending_rd_proc_pipe)
{
ForceCloseHandle1 (pending_rd_proc_pipe, rd_proc_pipe);
pending_rd_proc_pipe = NULL;
}
if (pending_wr_proc_pipe)
{
ForceCloseHandle1 (pending_wr_proc_pipe, wr_proc_pipe);
pending_wr_proc_pipe = NULL;
}
}
void
pinfo::postexec ()
{
if (wr_proc_pipe () && wr_proc_pipe () != INVALID_HANDLE_VALUE
&& !ForceCloseHandle (wr_proc_pipe ()))
&& !ForceCloseHandle1 (wr_proc_pipe (), wr_proc_pipe))
api_fatal ("postexec: couldn't close wr_proc_pipe(%p), %E", wr_proc_pipe ());
}
@ -1084,7 +1095,7 @@ _pinfo::alert_parent (char sig)
ppid = 1;
HANDLE closeit = wr_proc_pipe;
wr_proc_pipe = INVALID_HANDLE_VALUE;
CloseHandle (closeit);
ForceCloseHandle1 (closeit, wr_proc_pipe);
}
}
return (bool) nb;

1
winsup/cygwin/sigproc.h
View File

@ -166,7 +166,6 @@ public:
class hold_everything
{
public: /* DELETEME*/
bool ischild;
/* Note the order of the locks below. It is important,
to avoid races, that the lock order be preserved.