- As mentioned in commit message of the commit b531d6b0, if multiple
writers including non-cygwin app exist, the non-cygwin app cannot
detect pipe closure on the read side when the pipe is created by
system account or the the pipe creator is running as service.
This is because query_hdl which is held in write side also is a
read end of the pipe, so the pipe is still alive for the non-cygwin
app even after the reader is closed.
To avoid this problem, this patch lets all processes in the same
process group close query_hdl using newly introduced internal signal
__SIGNONCYGCHLD when non-cygwin app is started.
Addresses: https://cygwin.com/pipermail/cygwin/2022-March/251097.html
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>
After patch 23a779bf3d
"Cygwin: pinfo: stop remember doing reattach",
PROC_ADDCHILD actually just sets up a new child, mirroring
PROC_DETACHED_CHILD. The actual attaching of the child is
performed by action PROC_REATTACH_CHILD or pinfo::reattach
respectively.
To better reflect what's going on, rename PROC_REATTACH_CHILD
to PROC_ATTACH_CHILD and rename pinfo::reattach to pinfo::attach.
For better readability change PROC_ADDCHILD to PROC_ADD_CHILD.
Fix comments accordingly.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
NSIG is a deprecated symbol only visible under MISC visibility.
_NSIG is used widely instead, and on most systems NSIG is
defined in terms of _NSIG.
Follow suit: Change NSIG to _NSIG throughout and change visiblity
of NSIG to be defined only in __MISC_VISIBLE case.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
So far sig_send's return type is int. The problem with this is
that sig_send returns a sigset_t on __SIGPENDING, and sigset_t
is defined as long type. So the function only returns the lower
32 bit of sigset_t, which is fine on 32 bit, but casts away the
pending RT signals on 64 bit.
Fix this by changing the return type of sig_send to sigset_t, so
as not to narrow down the sigset when returning from handling
__SIGPENDING. Make sure to cast correctly in all invocations
of sig_send.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
First cut of a signalfd implementation.
Still TODO: Non-polling select.
This should mostly work as on Linux except for missing support
for some members of struct signalfd_siginfo, namely ssi_fd,
ssi_band (both SIGIO/SIGPOLL, not fully implemented) and ssi_trapno
(HW exception, required HW support).
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
Bump GPLv2+ to GPLv3+ for some files, clarify BSD 2-clause.
Everything else stays under GPLv3+.
New Linking Exception exempts resulting executables from LGPLv3 section 4.
Add CONTRIBUTORS file to keep track of licensing.
Remove 'Copyright Red Hat Inc' comments.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* sigproc.cc (thread_exit): Use no_thread_exit_protect to determine if we need
to coordinate ThreadExit/ExitProcess.
* fhandler_dsp.cc (fhandler_dev_dsp::Audio_out::stop): Use
no_thread_exit_protect to kludge around waiting for waveOutClose as it waits
for a thread that never exits.
(fhandler_dev_dsp::Audio_in::stop): Ditto for waveInClose.
* fhandler.h (fhandler_dev_dsp::base): New method.
(fhandler_dev_dsp::_read): Ditto.
(fhandler_dev_dsp::_write): Ditto.
(fhandler_dev_dsp::_ioctl): Ditto.
(fhandler_dev_dsp::_fixup_after_fork): Ditto.
(fhandler_dev_dsp::_fixup_after_exec): Ditto.
* fhandler_dsp.cc (fhandler_dev_dsp::read): Call real function via base()
pointer.
(fhandler_dev_dsp::write): Ditto.
(fhandler_dev_dsp::ioctl): Ditto.
(fhandler_dev_dsp::fixup_after_fork): Ditto.
(fhandler_dev_dsp::fixup_after_exec): Ditto.
(fhandler_dev_dsp::_read): Rename by adding an leading underscore.
(fhandler_dev_dsp::_write): Ditto.
(fhandler_dev_dsp::_ioctl): Ditto.
(fhandler_dev_dsp::_fixup_after_fork): Ditto.
(fhandler_dev_dsp::_fixup_after_exec): Ditto.
event.
(_cygtls::handle_SIGCONT): Declare ew function.
* cygwait.cc (is_cw_sig_handle): Delete.
(is_cw_sig_cont): New convenience define.
(cygwait): Clear signal if is_cw_sig_cont and we got a SIGCONT.
* cygwait.h (cw_wait_mask): Add cw_sig_cont.
* exceptions.cc (sig_handle_tty_stop): Tighten "incyg" region. Use cw_sig_cont
param for cygwait. Don't zero signal here outside of lock.
(sigpacket::setup_handler): Don't check for in_forkee since we will now never
get here in that state.
(_cygtls::handle_SIGCONT): Define new function.
(sigpacket::process): Call handle_SIGCONT early to deal with SIGCONT. Nuke
continue_now handling. Allow SIGKILL to kill a suspended process. Delete a
couple of now-unneeded labels.
(_cygtls::call_signal_handler): Reorganize setting of incyg within lock.
* sigproc.cc (pending_signals): Simplify.
(pending_signals::clear): New method.
(_cygtls::remove_wq): Reorganize to always close wq.thread_ev if it exists to
avoid handle leaks.
(sig_clear): Simplify by just calling sigq.clear().
(sig_dispatch_pending): Always call sigq.pending even in signal thread to force
another loop in wait_sig.
(sig_send): Remove a "goto out" just before out: label.
(pending_signals::add): Simplify.
(pending_signals::del): Delete.
(pending_signals::next): Delete.
(wait_sig): Define variable q to be the start of the signal queue. Just
iterate through sigq queue, deleting processed or zeroed signals. Only set
clearwait when the current signal is SIGCHLD.
* sigproc.h: Add a comment about an unused enum.
(mainly in fhandler*) start fixing gcc 4.7.2 mismatch between regparm
definitions and declarations.
* gendef: Define some functions to take @ declaration to accommodate _regN
defines which use __stdcall.
* gentls_offsets: Define __regN macros as empty.
* autoload.cc (wsock_init): Remove unneeded regparm attribute.
* winsup.h (__reg1): Define.
(__reg2): Define.
(__reg3): Define.
* advapi32.cc (DuplicateTokenEx): Coerce some initializers to avoid warnings
from gcc 4.7.2.
* exceptions.cc (status_info): Declare struct to use NTSTATUS.
(cygwin_exception::dump_exception): Coerce e->ExceptionCode to NTSTATUS.
* fhandler_clipboard.cc (cygnativeformat): Redefine as UINT to avoid gcc 4.7.2
warnings.
(fhandler_dev_clipboard::read): Ditto.
* exception.h (cygwin_exception): New class.
(cygwin_exception::dumpstack): Declare new function.
(cygwin_exception::context): Ditto.
(cygwin_exception::dump_exception): Ditto.
* exceptions.cc (cygwin_exception::dump_exception): Move into cygwin_exception
class. Accommodate new variable names.
(cygwin_exception::dumpstack): Ditto stackdump -> dumpstack.
(exception::handle): Move andreas processing earlier. Defer signal processing
decisions to the signal thread where they belong. Pass exception information
to sig_send via new siginfo_t si_cyg field.
(ctrl_c_handler): Wait for SIGHUP signal to be processed since it could cause a
process exit and we don't want races with thread exit lock.
(signal_exit): Move back here from sigproc.cc. Modify arguments and remove
from sigpacket class. Decide when to dump core based on signal type.
(sigpacket::process): Handle exiting signals in context of threads rather than
in the signal thread. Signal debugger on non-Windows signals. Remove
setup_signal_exit call.
* sigproc.cc (no_signals_available): Remove argument.
(signal_exit_code): Delete.
(close_my_readsig): Ditto.
(_cygtls::signal_exit): Move to exceptions.cc.
(sigproc_terminate): Don't attempt to terminate signal thread.
(setup_signal_exit): Delete.
(exit_thread): Use new si_cyg entry in siginfo_t.
(sig_send): Just use empty initializer for si. Accommodate change in
no_signals_available argument.
(wait_sig): Remove attempt to "go asynchronous" on process exit. Delete
__SIGEXIT handling. Don't ever exit.
* sigproc.h: Remove __SIGEXIT from signal enum. Renumber.
* include/cygwin/signal.h (siginfo_t): Add si_cyg entry.
* dcrt0.cc (do_exit): Just set exit_state to ES_EVENTS_TERMINATE and nuke call
to events_terminate which just set a superfluous flag.
* sigproc.cc (signal_exit_code): New variable.
(setup_signal_exit): Define new function.
(_cygtls::signal_exit): Remove accommodations for closing the signal pipe
handle.
(exit_thread): Just sleep if we're exiting.
(wait_sig): If signal_exit_code is set, just handle bookkeeping signals and
exit ReadFile loop if there is nothing more to process. Call signal_exit at
end if signal_exit_code is non-zero.
* sigproc.h (setup_signal_exit): Declare new function.
* exceptions.cc (sigpacket::process): Use setup_signal_exit to control exiting
due to a signal.
(exception::handle): Ditto. Query exit_state rather than defunct exit_already
to determine if we are exiting.
* globals.cc (ES_SIGNAL_EXIT): New enum.
* sync.h (lock_process::release): New function for explicitly unlocking muto.
(lock_process::~lock_process): Use release method.
some modifications.
* init.cc (dll_entry): Revert previous change.
* miscfuncs.cc: Include sigproc.h for exit_thread declaration.
* winsup.h (ExitThread): Define as 'exit_thread' to ensure no accidental use.
* sigproc.cc (exit_thread): New function.
(wait_sig): Handle __SIGTHREADEXIT case. Don't just block rather than
returning from this function.
* sigproc.h (__SIGTHREADEXIT): New enum.
(exit_thread): Declare.
* sync.cc (muto::release): Accept a tls command-line argument.
* sync.h (muto::release): Accept a tls command-line parameter. Default to
&_my_tls.
* cygerrno.h (__set_errno): Define as extern so that no function code is ever
emitted.
* cygserver_ipc.h (cygserver_ipc.h): Ditto.
* miscfuncs.h (transform_chars): Ditto.
* path.h (has_attribute): Ditto.
* security.h (privilege_luid): Ditto.
* winsup.h (flush_file_buffers): Ditto.
* _cygtls.cc (_cygtls::call2): Use new exit_thread function in place of
ExitThread.
* miscfuncs.cc (thread_wrapper): Ditto.
* thread.cc (pthread::exit): Ditto.
(pthread_mutex::unlock): Set tid to NULL rather than 0.
(pthread_spinlock::unlock): Ditto.
* pinfo.cc (commune_process): Actually call lock_process constructor.
* sigproc.cc (exit_thread): New function.
(wait_sig): Handle __SIGTHREADEXIT case. Don't just block rather than
returning from this function.
* sigproc.h (__SIGTHREADEXIT): New enum.
(exit_thread): Declare.
* sync.cc (muto::release): Accept a tls command-line argument.
* sync.h (muto::release): Accept a tls command-line parameter. Default to
&_my_tls.
* cygtls.h (_cygtls::push): Inline.
(_cygtls::interrupt_now): Change signal number argument to siginfo_t argument.
(_cygtls::interrupt_setup): Ditto.
(_cygtls::set_siginfo): Delete declaration.
(_cygtls::reset_signal_arrived): Don't reset signal_arrived signal. Just reset
flag.
* exceptions.cc (_cygtls::interrupt_now): Reflect argument changes. Pass si to
interrupt_setup.
(_cygtls::interrupt_setup): Reflect argument changes. Fill out tls infodata
here using passed-in si. Use si.si_signo instead of sig.
(sigpacket::setup_handler): Move this function into sigpacket class. Use si
field from the class as appropriate.
(sigpacket::process): Don't call tls->set_siginfo here since setup_handler
could fail. Eliminate now-unneeded sig argument.
* sigproc.h (sigpacket::setup_handler): Move setup_handler to this class.
* sigproc.h (sigdelayed): Make symbol globally available.
* gendef (sigdelayed): Specifically zero incyg and stacklock.
* signal.cc (sigwaitinfo): Lock _my_tls and try harder to clean up signal
information.
* exceptions.cc (sig_handle_tty_stop): Make sure that incyg is cleared when
exiting if we have no parent process. Only wait for signal_arrived.
(sigpacket::process): Make continue_now a bool. Delay sending signal_arrived
until the end. Make code more defensive to avoid calling signal handler when
stopped. Only set signal_arrived when stopped.
* sigproc.cc (sig_hold): Rename from sigCONT. Make static.
(sig_send): Accommodate sigCONT -> sig_hold rename.
(wait_sig): Ditto.
* sigproc.h (sigCONT): Delete declaration.
* fhandler_console.cc (fhandler_console::write): Use new '%0c' facility to
print characters. Change to paranoid to avoid excessive strace output.
* fhandler_tty.cc (fhandler_pty_master::accept_input): Make frequent strace
printf "paranoid" to help cut down on strace output size.
* signal.cc (sigsuspend): Add standard syscall strace output.
(sigpause): Ditto.
(pause): Ditto.
* cygtls.h (_cygtls::reset_signal_arrived): New function.
* cygserver_ipc.h (ipc_set_proc_info): Use _cygtls::ipc_set_proc_info to set
per-thread signal arrived value.
* cygthread.cc (cygthread::detach): Use per-thread signal_arrived via
set_thread_waiting.
* fork.cc (_cygtls::fixup_after_fork): Clear signal_arrived.
(_cygtls::remove): Close any signal_arrived handle when thread exists.
(_cygtls::find_tls): Remove unneeded function.
* cygtls.h: Update copyright.
(class _cygtls): Reorganize to help avoid rebuilding newlib when structure
changes.
(_cygtls::event): Delete.
(_cygtls::threadkill): Ditto.
(_cygtls::signal_waiting): Declare new bool.
(_cygtls::find_tls): Delete declaration.
(_cygtls::set_threadkill): Ditto.
(_cygtls::reset_threadkill): Ditto.
(_cygtls::set_signal_arrived): Declare new function.
(class set_thread_waiting): Declare new class.
* cygwait.cc (cw_nowait_storage): Define.
(cygwait): Set per-thread signal_arrived via set_thread_waiting. Don't
special-case _main_tls.
* cygwait.h (cw_nowait): Define.
(cw_infinite): Ditto.
(cygwait): Redefine pathological wait-only case.
* dcrt0.cc (dll_crt0_0): Remove call to now-defunct events_init().
(dll_crt0_1): Remove call to now-defunct create_signal_arrived().
* exceptions.cc: Reflect set_signal_mask() argument reordering throughout.
Remove signal mask synchronization throughout.
(events_init): Delete definition.
(mask_sync): Delete now-unneeded mask synchronization.
(set_signal_mask): Reverse order of arguments to "standard" to, from layout.
Rename "newmask" argument to "setmask". Remove debugging.
(sig_handle_tty_stop): Use cancelable_wait rather than WFMO.
(_cygtls::interrupt_setup): Don't treat "threadkill" events specially.
Conditionally set signal_arrived depending on whether the thread has created it
or not.
(sigpacket::process): Reorganize to reflect thread-specific sending of signals
which is more in line with the way it was actually supposed to work.
* fhandler_socket.cc (get_inet_addr): Use cancelable_wait rather than
IsEventSignalled to avoid potential race.
(fhandler_socket::wait_for_events): Set signal_arrived event using
set_thread_waiting().
(fhandler_socket::close): Use cygwait for the case of just waiting 10 ms for a
signal.
* fhandler_tape.cc (fhandler_dev_tape::_lock): Use cancelable_wait rather than
WFMO. Redo switch/case tests accordingly.
* fhandler_termios.cc (fhandler_termios::bg_check): Use cygwait for case of
just waiting 0 ms for a potential signal.
* fhandler_tty.cc (fhandler_pty_master::process_slave_output): Use
cancelable_wait rather than WFSO.
* fhandler_windows.cc (fhandler_windows::read): Set per-thread signal_arrived
via set_thread_waiting().
* flock.cc (lf_setlock): Ditto.
* select.cc (pselect): Ditto. Set per-thread signal_arrived using
set_thread_waiting().
* gendef: Don't special case handling of _cygtls::sig for threads.
* gentls_offsets: Use #pragma once in tlsoffsets.h.
* ntdll.h: Use #pragma once.
* poll.cc: Reflect set_signal_mask() argument reordering.
* posix_ipc.cc (ipc_mutex_lock): Use cancelable_wait rather than WFMO.
(ipc_cond_timedwait): Set perl-thread signal arrived using
set_thread_waiting().
* security.h: Use #pragma once.
* signal.cc (abort): Reflect set_signal_mask() argument reordering.
(clock_nanosleep): Ditto. Change call to cancelable_wait to properly specify
handling of cancel and interrupt.
(sigwaitinfo): Remove handling of per-thread event in favor of per-thread
signal_arrived. Use cancelable_wait rather than WFSO.
* sigproc.cc (signal_arrived): Delete definition.
(create_signal_arrived): Ditto.
* sigproc.h (signal_arrived): Delete declaration.
(set_signal_mask): Avoid defining as a "C" function. Don't conditionally
declare.
(create_signal_arrived): Delete declaration.
* syscalls.cc (rename): Use cygwait() rather than WFSO.
* thread.h (fast_mutex::lock): Use cw_infinite rather than LARGE_NULL.
* wait.cc (wait4): Ditto.
* thread.cc (pthread_mutex::lock): Ditto.
(pthread::join): Ditto.
(semaphore::_wait): Ditto.
(pthread_kill): Remove set_threadkill() accommodation.
* tlsoffsets.h: Regenerate.
(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.
* fhandler.h: Use #pragma once rather than ifdef guards.
(fhandler_console::tc_getpgid): Return our pgid if we have never opened a
console.
* fork.cc: Rearrange includes to accommodate fhandler.h use of pinfo.h.
* sigproc.cc: Ditto.
* spawn.cc: Ditto.
(child_info_spawn::worker): Query myself->pgid rather than calling expensive
function.
* thread.h: Use #pragma once rather than ifdef guards.
* pinfo.h: Use #pragma once rather than ifdef guards.
(pinfo::remember): Don't define if sigproc.h has not been included.
(pinfo::reattach): Ditto.
* sigproc.h: Use #pragma once rather than ifdef guards. Use different test to
see if pinfo.h has been included.
console.
* fhandler.cc (fhandler_base_overlapped::wait_overlapped): Add temporary kludge
to work around problem of make closing a handler while it is being read.
* gendef (sigdelayed): Don't call a function if sig has been cleared.
* sigproc.h (cygwait): Simplify slightly.
information.
* exceptions.cc (_cygtls::inside_kernel): Modernize comment. Consider
executing a DLL from the Wow64 directory as being "in the kernel".
(_cygtls::call_signal_handler): For now, only deal with main_tls signals if
main_tls is known to be executing in the cygwin DLL. To more closely emulate
linux, consider the operation to be restartable if not executing in the main
thread.
* globals.cc (windows_system_directory): Remove NO_COPY.
(windows_system_directory_length): Ditto.
(system_wow64_directory): New variable.
(system_wow64_directory_length): Ditto.
* select.cc (cygwin_select): Don't issue a EINTR on non-main threads since that
seems to be what Linux does. Add missing break to signal case/switch.
(select_stuff::wait): Don't issue a EINTR on non-main threads since that seems
to be what Linux does. Remove now-unneeded accommodation for
WAIT_IO_COMPLETION. Add a comment.
* sigproc.h (cygwait): Ditto. Don't return if signal_received noticed and it's
not the main thread.
* signal.cc (sigprocmask): Add standard syscall debug stuff.
* thread.cc (pthread_sigmask): Ditto.
(peek_windows): Report on HWND handle used in queries.
* select.h: Update copyright.
* sigproc.h (cygwait): Eliminate multi-argument variety since more general
implementation may cause odd problems in select. Also force to always be
inline.
for stuff".
* fhandler.cc (fhandler_base_overlapped::wait_overlapped): Use simplified arg
form of cygwait.
* fhandler_console.cc (fhandler_console::read): Ditto.
* fhandler_audio.cc (fhandler_dev_dsp::Audio_out::waitforspac): Ditto.
(fhandler_dev_dsp::Audio_in::waitfordata): Ditto.
* fhandler_fifo.cc (fhandler_fifo::wait): Ditto.
* fhandler_serial.cc (fhandler_serial::raw_read): Ditto.
(fhandler_serial::raw_write): Ditto.
* select.cc (cygwin_select): Ditto.
* sigproc.h (cygwait): Rename from cygWFMO. Define two argument and single
argument forms of this function.
* fhandler_tty.cc (fhandler_pty_slave::open): Use method to query if tty is
open.
(fhandler_pty_slave::read): Send SIGHUP when master is detected as closed.
(fhandler_pty_common::close): Close input_available_event in callers since
master may need to signal it first.
(fhandler_pty_master::close): Lie and set input_available_event when closing,
then close input_available_event.
(fhandler_pty_slave::close): Close input_available_event explicitly here.
* tty.h (tty::is_master_closed): Declare new method.
never remember what it stands for.
(sig_handle_tty_stop): Remove obsolete call to sig_handle_tty_stop.
(_cygtls::call_signal_handler): Rework to grab signal information from
_main_tls if none is set for _my_tls. Try harder to keep thread locked.
(reset_signal_arrived): Delete.
* fhandler.cc (fhandler_base_overlapped::wait_overlapped): Use new cygWFMO call
to wait for an event + standard cygwin stuff. Modify debug output to
acccomodate new function.
* fhandler_console.cc (fhandler_console::read): Replace WaitForMultipleObjects
with cygWFMO.
* fhandler_socket.cc (get_inet_addr): Add comment.
* gendef (_sigdelayed): Remove call to reset_signal_arrived.
* sigproc.cc (_cygtls::signal_exit): Don't close my_readsig here unless we're
in the signal thread.
(create_signal_arrived): Create signal_arrived as auto-reset so that only one
thread is woken when a signal arrives.
* sigproc.h (cygWFMO): New function.
(reset_signal_arrived): Delete declaration.
Throughout rename _PROC_* to _CH_*.
* child_info.h: Include "pinfo.h".
(child_info_types): Rename _PROC_* -> _CH_* to avoid confusion with similarly
named constants.
(_PROC_*): Delete unneeded aliases.
(PROC_*): Ditto.
(CURR_CHILD_INFO_MAGIC): Ditto.
(cchildren): Define using "pinfo_minimal".
(child_info::set_saw_ctrl_c): Move to
(child_info_spawn::set_saw_ctrl_c): Here.
(child_info_spawn::lock): New field.
(child_info_spawn::hExeced): Ditto.
(child_info_spawn::ev): Ditto.
(child_info_spawn::~child_info_spawn): Move to sigproc.cc.
(child_info_spawn::child_info_spawn): Ditto.
(child_info_spawn::cleanup): Declare new function.
(child_info_spawn::set_saw_ctrl_c): Move to this class. Set flag only when
execed and return true when we have set the flag.
(child_info_spawn::child_info_spawn::signal_myself_exited): New function.
(child_info_spawn::wait_for_myself): Ditto.
(child_info_spawn::has_execed_cygwin): Ditto.
(child_info_spawn::has_execed): Ditto. Replaces "hExeced" test.
(child_info_spawn::operator HANDLE&): New operator.
(child_info_spawn::worker): Define old "spawn_guts" as class member.
(ch_spawn): Declare.
(have_execed): Define.
(have_execed_cygwin): Ditto.
* cygheap.h: Update comment.
* dcrt0.cc (get_cygwin_startup_info): Use _CH_* enums.
(child_info_spawn::handle_spawn): Ditto.
(dll_crt0_0): Ditto.
(multiple_cygwin_problem): Ditto.
* exceptions.cc (chExeced): Delete obsolete declaration.
(ctrl_c_handler): Reference set_saw_ctrl_c via new ch_spawn global.
* globals.cc (hExeced): Delete.
* pinfo.cc (pinfo::thisproc): Refer to cygheap as ::cygheap for consistency in
handle naming when -DDEBUGGING.
(pinfo::init): Accommodate case where myself.h is known but h0 is passed in.
(pinfo::pinfo): New constructor for setting up a pinfo passed in by previous
exec'or.
(pinfo::proc_waiter): Don't handle subprocess if we're in the process of
exiting due to an exec of a cygwin process. Don't close rd_proc_pipe here.
Close it when we actually are finished with the process. Use new
ch_spawn.signal_myself_exited function to let exec stub know that subprocess
has exited.
(pinfo::wait): Clarify debugging output.
(pinfo::release): Use "close_h" to close all handles to avoid races.
(winpids::add): Assume that elements of the array do not need to be zeroed and
are properly initialized or suffer problems on pinfo::release. Don't close
hProcess since release does that now.
* pinfo.h: Update comment.
(pinfo_minimal): Move some elements from pinfo here so that child_info_spawn
can use them.
(pinfo): Inherit from pinfo_minimal.
(pinfo::pinfo): Modify to accommodate new pinfo_minimal.
(pinfo::allow_remove): New function.
* sigproc.cc (proc_subproc): Use boolean values for true/false. Implement
PROC_EXEC_CLEANUP.
(proc_terminate): Set ppid = 1 since the procs list will only be iterated when
the process has not execed. Don't do any cleanup here since it is now handled
in pinfo::release.
(sigproc_init): Initialize sync_proc_subproc earlier.
(child_info::child_info): Assume that all important fields are properly
initialized and avoid memset().
(child_info_spawn::child_info_spawn): Specifically test for execing and then
set up appropriate fields in the struct.
(child_info_spawn::cleanup): Define new function.
(child_info_spawn::record_children): Specifically test for being execed here.
Fill in pinfo_minimal part of children array.
(child_info_spawn::reattach_children): Use constructor to duplicate information
for previous exec'or. Add more debugging output.
(remove_proc): Force deletion of thread when exiting due to exec. Rely on
pinfo::cleanup in release.
* sigproc.h (PROC_EXEC_CLEANUP): New enum.
(PROC_DETACHED_CHILD): Delete.
* spawn.cc (chExeced): Delete.
(child_info_spawn::worker): Rename from spawn_guts. Use elements of
child_info_spawn throughout rather than ch.whatever. Use ::cygheap to refer to
global rather than element of child_info. Use wait_for_myself() rather than
waitpid(). Call child_info_spawn::cleanup on function return.
(spawnve): Reflect movement of spawn_guts functionality into
child_info_spawn::worker.
* syscalls.cc (popen): Ditto.
* winsup.h (spawn_guts): Delete declaration.
(child_info_spawn::nchildren): Rename from nprocs.
(child_info_spawn::children): Change type to cchildren for more bookkeeping
possibilities.
(child_info_spawn::child_info_spawn): Clear nchildren.
(child_info_spawn::record_children): Declare new function.
(child_info_spawn::reattach_children): Ditto.
* dcrt0.cc (child_info_spawn::handle_spawn): Call reattach_children to gather
list of processes we are potentially waiting for.
* pinfo.h (pinfo::pinfo): Make sure that rd_proc_pipe is always cleared.
(pinfo::reattach): New function.
* sigproc.cc: Move pinfo.h earlier so that it can be used in sigproc.h.
(get_proc_lock): Don't bother with a lock during DLL initialization.
(proc_subproc): Handle PROC_REATTACH_CHILD.
(proc_terminate): Orphan children only when we are not an execed process or
when the pid is about to be occupied by a non-cygwin process.
(child_info_spawn::record_children): Define new function.
(child_info_spawn::reattach_children): Ditto.
* sigproc.h (procstuff): Define PROC_REATTACH_CHILD and renumber other
elements.
* spawn.cc (spawn_guts): Record any to-be-waited-for subprocesses if about to
exec a cygwin process.
* sigproc.cc (sig_send): Fix harmless transposition of fifth and six arguments
to DuplicateHandle().
(child_info::child_info): Ditto.
* globals.cc (hExeced): Make NO_COPY.
pseudo signal to process group instead of just calling
init_console_handler.
* sigproc.cc (wait_sig): Call init_console_handler here on __SIGSETPGRP
signal.
* sigproc.h (__SIGSETPGRP): Define.
__name.
* cygthread.h (cygthread::cygthread): Create versions which eliminate 'n'
parameter.
* dcrt0.cc (dll_crt0_1): Remove check for threadfunc_ix. Remove obsolete
comments. Set process_state to active here.
* fhandler_netdrive.cc (create_thread_and_wait): Use shortened cygthread
constructor.
* timer.cc (timer_tracker::settime): Ditto.
* window.cc (HWND): Ditto.
* fhandler_tty.cc: Use shortened cygthread constructor, where appropriate,
throughout.
* select.cc: Ditto.
* fork.cc (frok::child): Remove wait_for_sigthread.
(fork): Reformat if for slightly better clarity.
* init.cc (dll_finished_loading): New variable.
(dll_entry): Use dll_finished_loading to determine when we should call
merge_threadfunc.
* sigproc.cc (no_signals_available): Simplify by using my_readsig.
(wait_sig_inited): Delete.
(wait_sig): Define as void function.
(pending_signals): Accommodate change to wait_sig definition.
(wait_for_sigthread): Delete definition.
(sigproc_init): Initialize signal pipe here, before wait_sig thread is created.
Use void form of cygthread creation.
(init_sig_pipe): Delete.
(wait_sig): Return void rather than DWORD. Assume previous initialization of
signal pipe. Set my_sendsig to NULL when exiting.
* sigproc.h (wait_for_sigthread): Delete declaration.
Ken Brown
Takashi Yano
Corinna Vinschen
Christopher Faylor