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* fork.cc (fork): Lock the process before forking to prevent things like new

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fds from being opened, etc.
* sync.h (lock_process::dont_bother): New function.
This commit is contained in:
Christopher Faylor 2006-07-14 22:15:12 +00:00
parent d9ceecd2d2
commit fbadc634cb
3 changed files with 12 additions and 1 deletions
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6
winsup/cygwin/ChangeLog
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@ -1,3 +1,9 @@
2006-07-14 Christopher Faylor <cgf@timesys.com>
* fork.cc (fork): Lock the process before forking to prevent things
like new fds from being opened, etc.
* sync.h (lock_process::dont_bother): New function.
2006-07-14 Christopher Faylor <cgf@timesys.com> 2006-07-14 Christopher Faylor <cgf@timesys.com>
* include/cygwin/types.h: Update copyright. * include/cygwin/types.h: Update copyright.

4
winsup/cygwin/fork.cc
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@ -533,6 +533,7 @@ fork ()
return -1; return -1;
} }
lock_process now;
if (sig_send (NULL, __SIGHOLD)) if (sig_send (NULL, __SIGHOLD))
{ {
if (exit_state) if (exit_state)
@ -547,7 +548,10 @@ fork ()
__asm__ volatile ("movl %%esp,%0": "=r" (esp)); __asm__ volatile ("movl %%esp,%0": "=r" (esp));
if (ischild) if (ischild)
{
res = grouped.child (esp); res = grouped.child (esp);
now.dont_bother ();
}
else else
{ {
res = grouped.parent (esp); res = grouped.parent (esp);

1
winsup/cygwin/sync.h
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@ -50,6 +50,7 @@ class lock_process
static muto locker; static muto locker;
public: public:
static void init () {locker.init ("lock_process");} static void init () {locker.init ("lock_process");}
void dont_bother () {skip_unlock = true;}
lock_process (bool exiting = false) lock_process (bool exiting = false)
{ {
locker.acquire (); locker.acquire ();