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* child_info.h (child_info_spawn::hexec_proc): Eliminate.

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* dcrt0.cc (dll_crt0_0): Remove hexec_proc stuff.
* fork.cc (fork_child): Remove call to pinfo_fixup_after_fork.
* pinfo.cc (set_myself): Close and zero pid_handle if set.
(pinfo_fixup_after_fork): Delete.
(proc_waiter): Don't close vchild.hProcess here.  Do that when we are remove
the vchild from procs.  Save hProcess as pid_handle only on first reparent
operation.
(pinfo::wait): Don't set pid_handle here.
(pinfo::alert_parent): Always try to send signal.  If unsuccessful then close
and zero wr_proc_pipe.
* pinfo.h (pinfo::pinfo): Make sure that appropriate parts of the class are
zeroed on construction.
(pinfo::alert_parent): Take char argument.
(pinfo_fixup_after_fork): Delete declaration.
(hexec_proc): Ditto.
* sigproc.cc (remove_proc): Close pid_handle and hProcess if appropriate.
* spawn.cc (spawn_guts): Set cygheap->pid_handle on first exec.
* cygheap.h (init_cygheap::pid_handle): New element.
* pinfo.cc (set_myself): Clear previously existing cygheap->pid_handle when a
new process has been started.
(pinfo::wait): Make sure that a handle to the newly forked/spawned process is
kept around so that the pid will not be reused.
* pinfo.h (_pinfo::pid_handle): Move.
(pinfo::pid_handle): to here.
* spawn.cc (spawn_guts): Create a pid_handle in cygheap prior to spawning to
ensure that the pid does not get reused during the lifetime of the "cygwin
pid".
* pinfo.h (pinfo::alert_parent): New function.
* exceptions.cc (sig_handle_tty_stop): Use alert_parent to send "signals" to
parent.
* fork.cc (fork_parent): Don't close pi.hProcess.  Let the waiter thread do
that.
* pinfo.cc (proc_waiter): Detect case where process exits without setting the
exit code and use value from GetExitCodeProcess.  Reluctantly implement
__SIGREPARENT.
(pinfo::alert_parent): Define.
* sigproc.h (__SIGREPARENT): New enum.
* spawn.cc (spawn_guts): Send reparent signal to parent on exec.  Always create
process in suspended state to avoid races.  Remove cygthread.h in favor of
cygtls.h throughout since cygtls now includes cygthread.h.  Eliminate
ppid_handle usage throughout.
* child_info.h: Regenerate magic number
(child_info): Remove pppid_handle.
* cygthread.h (cygthread::release): New method.  Frees thread without waiting.
* cygthread.cc (cygthread::stub): Set _ctinfo in _mytls to point to information
for executing thread.  Don't call SetEvent if thread is no longer in use.
(cygthread::simplestub): Ditto.
* cygtls.h (_cygtls::_ctinfo): New element contains pointer to information
about executing cygthread, if any.
* dcrt0.cc: Remove last vestiges of per_thread stuff.
(dll_crt0_0): Ditto.  Remove accommodation for ppid_handle.
(do_exit): Remove obsolete reparenting test.
(_exit): Exit with a more SUSv3-like exit value.
* dtable.cc (dtable::stdio_init): Check for myself->cygstarted rather than
myself->ppid_handle to see if we were started by a cygwin process.
* exceptions.cc (open_stackdumpfile): Ditto.
(handle_exceptions): Ditto.
(ctrl_c_handler): Ditto.
(sig_handle_tty_stop): Ditto.  Let parent send signal to itself on STOP.
(sigpacket::process): Comment out vfork test.
(signal_exit): Use more SUSv3-like exit value on signal.
* external.cc (fillout_pinfo): Don't set hProcess.
* fork.cc: Remove VFORK cruft.
(per_thread::set): Delete.
(fork_child): Remove perthread stuff.
(fork_parent): Remove obsolete subproc_init.  Accommodate new method for
tracking subprocesses.
* pinfo.cc (set_myself): Accommodate new pinfo/_pinfo layout.  Set some things
here that used to be set in wait_sig.
(_pinfo::exit): Set exitcode here.  Close process pipe.
(_pinfo::commune_send): Accommodeate new pinfo/_pinfo layout.
(proc_waiter): New function.  Waits, in a thread for subprocess to go away.
(pinfo::wait): New function.  Initialization for proc_waiter.
* pinfo.h (_pinfo::exitcode): New element.
(_pinfo::cygstarted): Ditto.
(_pinfo::wr_proc_pipe): Ditto.
(_pinfo::ppid_handle): Delete.
(_pinfo::hProcess): Delete.
(_pinfo::lock): Delete.
(pinfo::hProcess): New element.
(pinfo::lock): Ditto.
(pinfo::wait): Declare new function.
(pinfo::preserve): Define new function.
* sigproc.cc: Remove old stuff from wait_subproc thread based method.
(zombies): Remove.
(procs): New.
(my_parent_is_alive): Just check that the parent pid exists.
(mychild): Just use pinfo methods to determine if child is mine.
(proc_subproc): Revamp PROC_ADDCHILD to use pinfo::wait.  Remove
PROC_CHILDTERMINATED logic.  Use different method to remove processes from list
when SIGCHLD == SIG_IGN.
(proc_terminate): Gut.
(subproc_init): Delete.
(init_child_info): Remove setting of pppid_handle.
(checkstate): Revamp to only scan procs array.
(remove_proc): Rename from remove_zombie.  Don't close hProcess or pid_handle.
Don't release memory if it's myself.
(stopped_or_terminated): Change logic to handle new consolidated proc/zombie
array.
(wait_subproc): Delete.
* sigproc.h: Remove obsolete EXIT_* defines.
(subproc_init): Remove declaration.
* spawn.cc (spawn_guts): Remove reparenting stuff.  Use standard wait logic to
wait for child if started from a non-cygwin process.
* tlsoffsets.h: Regenerate.
* tty.cc (tty_init): Check for myself->cygstarted rather than
myself->ppid_handle to see if we were started by a cygwin process.
* include/sys/signal.h (external_pinfo::exitcode): Replace hProcess.
* include/sys/wait.h (WCOREDUMP): Define.
* fhandler_tty.cc (fhandler_tty_slave::read): Add debugging output for timeout
case.
* signal.cc (abort): Flag that we are exiting with the ABORT signal.
This commit is contained in:
Christopher Faylor
2004-11-26 04:15:10 +00:00
parent c1ab3396dc
commit 8cb359d947
33 changed files with 656 additions and 798 deletions
Download Patch File Download Diff File Expand all files Collapse all files

35
winsup/cygwin/exceptions.cc
View File

@ -20,12 +20,9 @@ details. */
#include "cygtls.h"
#include "sigproc.h"
#include "cygerrno.h"
#define NEED_VFORK
#include "perthread.h"
#include "shared_info.h"
#include "perprocess.h"
#include "security.h"
#include "cygthread.h"
#define CALL_HANDLER_RETRY 20
@ -159,7 +156,7 @@ open_stackdumpfile ()
CREATE_ALWAYS, 0, 0);
if (h != INVALID_HANDLE_VALUE)
{
if (!myself->ppid_handle)
if (!myself->cygstarted)
system_printf ("Dumping stack trace to %s", corefile);
else
debug_printf ("Dumping stack trace to %s", corefile);
@ -514,7 +511,7 @@ handle_exceptions (EXCEPTION_RECORD *e0, void *frame, CONTEXT *in0, void *)
|| (void *) global_sigs[si.si_signo].sa_handler == (void *) SIG_ERR)
{
/* Print the exception to the console */
if (!myself->ppid_handle)
if (!myself->cygstarted)
for (int i = 0; status_info[i].name; i++)
if (status_info[i].code == e.ExceptionCode)
{
@ -596,31 +593,15 @@ sig_handle_tty_stop (int sig)
_my_tls.incyg = 1;
/* Silently ignore attempts to suspend if there is no accommodating
cygwin parent to deal with this behavior. */
if (!myself->ppid_handle)
if (!myself->cygstarted)
{
myself->process_state &= ~PID_STOPPED;
return;
}
myself->stopsig = sig;
/* See if we have a living parent. If so, send it a special signal.
It will figure out exactly which pid has stopped by scanning
its list of subprocesses. */
if (my_parent_is_alive ())
{
pinfo parent (myself->ppid);
if (NOTSTATE (parent, PID_NOCLDSTOP))
{
siginfo_t si;
si.si_signo = SIGCHLD;
si.si_code = SI_KERNEL;
si.si_sigval.sival_int = CLD_STOPPED;
si.si_errno = si.si_pid = si.si_uid = si.si_errno = 0;
sig_send (parent, si);
}
}
sigproc_printf ("process %d stopped by signal %d, myself->ppid_handle %p",
myself->pid, sig, myself->ppid_handle);
myself.alert_parent (sig);
sigproc_printf ("process %d stopped by signal %d", myself->pid, sig);
HANDLE w4[2];
w4[0] = sigCONT;
w4[1] = signal_arrived;
@ -629,6 +610,7 @@ sig_handle_tty_stop (int sig)
case WAIT_OBJECT_0:
case WAIT_OBJECT_0 + 1:
reset_signal_arrived ();
myself.alert_parent (SIGCONT);
break;
default:
api_fatal ("WaitSingleObject failed, %E");
@ -807,7 +789,7 @@ ctrl_c_handler (DWORD type)
if (!cygwin_finished_initializing)
{
if (myself->ppid_handle) /* Was this process created by a cygwin process? */
if (myself->cygstarted) /* Was this process created by a cygwin process? */
return TRUE; /* Yes. Let the parent eventually handle CTRL-C issues. */
debug_printf ("exiting with status %p", STATUS_CONTROL_C_EXIT);
ExitProcess (STATUS_CONTROL_C_EXIT);
@ -982,7 +964,7 @@ sigpacket::process ()
bool special_case;
bool insigwait_mask;
insigwait_mask = masked = false;
if (special_case = (VFORKPID || ISSTATE (myself, PID_STOPPED)))
if (special_case = (/*VFORKPID || */ISSTATE (myself, PID_STOPPED)))
/* nothing to do */;
else if (tls && sigismember (&tls->sigwait_mask, si.si_signo))
insigwait_mask = true;
@ -1097,7 +1079,6 @@ static void
signal_exit (int rc)
{
EnterCriticalSection (&exit_lock);
rc = EXIT_SIGNAL | (rc << 8);
if (exit_already++)
myself->exit (rc);