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* cygtls.h (_threadinfo::stack): Increase stack size to accommodate nested

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signal handlers.  Reorganize to cause potential SEGV on stack overflow.
* sigproc.cc (no_signals_available): Check sendsig value rather than relying on
obsolete sig_loop_wait.
(sigproc_terminate): Ditto.
(proc_can_be_signalled): Check sendsig value even for myself.
* tlsoffsets.h: Regenerate.
This commit is contained in:
Christopher Faylor
2003-12-30 03:59:45 +00:00
parent 8ed5c9b629
commit f7cb207b69
4 changed files with 60 additions and 54 deletions
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16
winsup/cygwin/sigproc.cc
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@@ -43,7 +43,7 @@ details. */
#define wake_wait_subproc() SetEvent (events[0])
#define no_signals_available() (!hwait_sig || !sig_loop_wait || exit_state)
#define no_signals_available() (!hwait_sig || (myself->sendsig == INVALID_HANDLE_VALUE) || exit_state)
#define NZOMBIES 256
@@ -129,7 +129,6 @@ HANDLE NO_COPY signal_arrived; // Event signaled when a signal has
#define Static static NO_COPY
Static DWORD proc_loop_wait = 1000; // Wait for subprocesses to exit
Static DWORD sig_loop_wait = INFINITE; // Wait for signals to arrive
Static HANDLE sigcomplete_main; // Event signaled when a signal has
// finished processing for the main
@@ -248,18 +247,15 @@ get_proc_lock (DWORD what, DWORD val)
static bool __stdcall
proc_can_be_signalled (_pinfo *p)
{
if (p == myself_nowait || p == myself)
{
assert (!wait_sig_inited);
return true;
}
if (p->sendsig == INVALID_HANDLE_VALUE)
{
set_errno (EPERM);
return false;
}
if (p == myself_nowait || p == myself)
return hwait_sig;
if (ISSTATE (p, PID_INITIALIZING) ||
(((p)->process_state & (PID_ACTIVE | PID_IN_USE)) ==
(PID_ACTIVE | PID_IN_USE)))
@@ -657,12 +653,11 @@ sigproc_terminate (void)
{
hwait_sig = NULL;
if (!sig_loop_wait)
if (myself->sendsig == INVALID_HANDLE_VALUE)
sigproc_printf ("sigproc handling not active");
else
{
sigproc_printf ("entering");
sig_loop_wait = 0; // Tell wait_sig to exit when it is
// finished with anything it is doing
ForceCloseHandle (sigcomplete_main);
HANDLE sendsig = myself->sendsig;
@@ -800,7 +795,6 @@ sig_send (_pinfo *p, int sig, void *tls)
rc = 0; // Successful exit
else
{
/* It's an error unless sig_loop_wait == 0 (the process is exiting). */
if (!no_signals_available ())
system_printf ("wait for sig_complete event failed, signal %d, rc %d, %E",
sig, rc);