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Cygwin: drop PROC_DETACHED_CHILD flag 

pinfo::remember with the detach parameter set to true is
the only way to call proc_subproc with PROC_DETACHED_CHILD.
This call is exclusively used in spawn to set up a pinfo for
a detached child, and that pinfo goes out of scope right
afterwards without any further action.

Drop the flag and drop the detach parameter from pinfo::remember.

Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
This commit is contained in:
Corinna Vinschen 2020-08-28 11:10:48 +02:00
parent 558fa888e5
commit 163daed37c
5 changed files with 11 additions and 18 deletions
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2
winsup/cygwin/fork.cc
View File

@ -415,7 +415,7 @@ frok::parent (volatile char * volatile stack_here)
it in afterwards. This requires more bookkeeping than I like, though,
so we'll just do it the easy way. So, terminate any child process if
we can't actually record the pid in the internal table. */
if (!child.remember (false))
if (!child.remember ())
{
this_errno = EAGAIN;
#ifdef DEBUGGING0

5
winsup/cygwin/pinfo.h
View File

@ -196,10 +196,9 @@ public:
destroy = res ? false : true;
return res;
}
int remember (bool detach)
int remember ()
{
int res = proc_subproc (detach ? PROC_DETACHED_CHILD : PROC_ADD_CHILD,
(uintptr_t) this);
int res = proc_subproc (PROC_ADD_CHILD, (uintptr_t) this);
destroy = res ? false : true;
return res;
}

8
winsup/cygwin/sigproc.cc
View File

@ -205,9 +205,6 @@ proc_subproc (DWORD what, uintptr_t val)
set_errno (EAGAIN);
break;
}
fallthrough;
case PROC_DETACHED_CHILD:
if (vchild != myself)
{
vchild->uid = myself->uid;
@ -217,8 +214,7 @@ proc_subproc (DWORD what, uintptr_t val)
vchild->ctty = myself->ctty;
vchild->cygstarted = true;
vchild->process_state |= PID_INITIALIZING;
vchild->ppid = what == PROC_DETACHED_CHILD
? 1 : myself->pid; /* always set last */
vchild->ppid = myself->pid; /* always set last */
}
break;
@ -879,7 +875,7 @@ void
child_info_spawn::wait_for_myself ()
{
postfork (myself);
if (myself.remember (false))
if (myself.remember ())
myself.attach ();
WaitForSingleObject (ev, INFINITE);
}

9
winsup/cygwin/sigproc.h
View File

@ -33,11 +33,10 @@ enum procstuff
PROC_ADD_CHILD = 1, // set up a new child
PROC_ATTACH_CHILD = 2, // attach child or reattach after exec
PROC_EXEC_CLEANUP = 3, // cleanup waiting children after exec
PROC_DETACHED_CHILD = 4, // set up a detached child
PROC_CLEARWAIT = 5, // clear all waits - signal arrived
PROC_WAIT = 6, // setup for wait() for subproc
PROC_EXECING = 7, // used to get a lock when execing
PROC_NOTHING = 8 // nothing, really
PROC_CLEARWAIT = 4, // clear all waits - signal arrived
PROC_WAIT = 5, // setup for wait() for subproc
PROC_EXECING = 6, // used to get a lock when execing
PROC_NOTHING = 7 // nothing, really
};
struct sigpacket

5
winsup/cygwin/spawn.cc
View File

@ -867,9 +867,8 @@ child_info_spawn::worker (const char *prog_arg, const char *const *argv,
child->start_time = time (NULL); /* Register child's starting time. */
child->nice = myself->nice;
postfork (child);
if (mode == _P_DETACH
? !child.remember (true)
: !(child.remember (false) && child.attach ()))
if (mode != _P_DETACH
&& (!child.remember () || !child.attach ()))
{
/* FIXME: Child in strange state now */
CloseHandle (pi.hProcess);