the pthread stack setup.
* wow64.cc (wow64_revert_to_original_stack): Rephrase some comments.
Return _tlsbase-16 rather than _main_tls-4 so as not to waste stack.
the case oldpath is no .lnk symlink and newpath points to an existing
.lnk symlink or .exe file and no explicit .lnk suffix has been given
in oldpath. Add a comment to explain.
rather than for wincap.is_wow64. Accommodate name change from
wow64_has_64bit_parent to wow64_needs_stack_adjustment. Align comment.
(_dll_crt0): Ditto.
* wincap.h (wincaps::wow64_has_secondary_stack): New element.
* wincap.cc: Implement above element throughout.
(wincapc::init): Set wow64_has_secondary_stack to false on non-64 bit
systems.
* wow64.cc (wow64_needs_stack_adjustment): Rename (hopefully the last
time) from wow64_has_64bit_parent.
(wow64_eval_expected_main_stack): Fix comment to reflect real life.
(wow64_test_for_64bit_parent): Fix comment.
* wow64.h (wow64_needs_stack_adjustment): Accommodate new name.
closed().
(fhandler_base_overlapped::close): Correct comment.
(fhandler_base_overlapped::destroy_overlapped): Signal overlapped event before
closing it to potentially wake up a waiting thread.
(fhandler_base_overlapped::wait_overlapped): Expand setting of err when closed
to encompass non-signal event. Test for a cancel event before making
nonblocking decisions.
* syscalls.cc (close): Set closed flag here so that any concurrently executing
functions will be notified ASAP.
* fhandler.cc (fhandler_base::write): Ditto.
(fhandler_base_overlapped::close): Cancel any ongoing I/O before closing.
* syscalls.cc (write): Default to always reporting all writes in strace output
via syscall_printf.
* wait.cc (wait4): Fix debugging output. Use standard syscall leaver output.
* cygheap.h
(cygheap_fdmanip::release): Make virtual.
(cygheap_fdnew::~cygheap_fdnew): New destructor increments reference count when
fd has been allocated.
(cygheap_fdget::fh): New (old?) field.
(cygheap_fdget::cygheap_fdget): Increment reference count when we've found an
active fd. Set fh appropriately.
(cygheap_fdget::~cygheap_fdget): Decrement reference count when appropriate.
Delete fh if reference count goes to zero.
(cygheap_fdget::release): New function. Do more bookkeping on release.
* dtable.cc (dtable::release): Change from void to boolean return. Only delete
the fhandler when its reference count is <= 0 (this should be a fairly unusual
case). Return true if fhandler has been deleted.
(cygwin_attach_handle_to_fd): Increment reference count when fh is assigned.
(dtable::init_std_file_from_handle): Ditto.
* dtable.h (dtable::release): Change return to boolean.
* fhandler.cc (fhandler_base::fhandler_base): Set new isclosed flag to false.
Set _refcnt to zero.
(fhandler_base::close): Simplify paranoid debugging output. Set new isclosed()
flag.
(fhandler_base_overlapped::wait_overlapped): Use isclosed() flag to avoid
querying the exception handle.
* fhandler.h (fhandler_base::_refcnt): New field.
(fhandler_base::refcnt): New function.
(fhandler_base::isclosed): Implement.
(fhandler_base::fhandler_base): Set isclosed to false.
* syscalls.cc: Remove space after function before parentheses for several
strace printfs.
(dup): Add standard strace "leaver" code.
(dup2): Ditto.
(dup3): Ditto.
(remove): Ditto.
(getpid): Ditto.
(getppid): Ditto.
(lseek64): Fix strace debugging to correctly use %R.
* fhandler_termios.cc (fhandler_termios::tcsetpgrp): Avoid sending signals to
other processes if we're debugging since it can cause a deadlock with the
calling debugger.
* exceptions.cc (_cygtls::call_signal_handler): Add debugging-only strace
output.
parent stack fits into the child stack. Align comment.
* wow64.cc (wow64_eval_expected_main_stack): New function to fetch
expected addresses of main thread stack from PE/COFF image header
values.
(wow64_test_for_64bit_parent): Fix comment. Check current stack
against real expected main thread stack addresses.
(wow64_revert_to_original_stack): Fix and add comments. Check memory
against real expected main thread stack addresses. Use orignal stack
if reserved area is >= 256K.
* dcrt0.cc (CYGWIN_GUARD): Drop execute permission for stack, it's
not used for stacks by the OS either.
(child_info_fork::alloc_stack_hard_way): Ditto.
(child_info_fork::alloc_stack): Don't alloc_stack_hard_way under WOW64
if forked from a 64 bit parent. Set child's StackBase to parent's
StackBase. Add comments to explain why.
(wow64_respawn): Move to wow64.cc.
(wow64_started_from_native64): Move to wow64.cc.
(respawn_wow64_process): Move to wow64.cc.
(dll_crt0_0): Drop wow64_test_stack_marker and move stack test into
wow64_test_for_64bit_parent function. Don't return early if WOW64
process has been started from native 64 bit process.
(_dll_crt0): Implement moving stack for WOW64 processes started from
native 64 bit process.
* wow64.cc: New file.
(wow64_has_64bit_parent): Rename from wow64_respawn.
(wow64_test_for_64bit_parent): Rename from wow64_started_from_native64.
Change comment.
(wow64_revert_to_original_stack): New function.
(wow64_respawn_process): Rename from respawn_wow64_process for symmetry.
* wow64.h: New file.
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.
* autoload.cc (GetSystemWow64DirectoryW): Define.
(GetVolumePathNamesForVolumeNameW): Define.
* fhandler_process.cc (get_volume_path_names_for_volume_name): New
static function to workaround missing GetVolumePathNamesForVolumeNameW
function in Windows 2000.
(dos_drive_mappings::dos_drive_mappings): Call
get_volume_path_names_for_volume_name instead of
GetVolumePathNamesForVolumeNameW.
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.
file_get_fnoi instead of NtQueryInformationFile.
* path.cc (file_get_fnoi): New helper function to collect a
FILE_NETWORK_OPEN_INFORMATION block.
(symlink_info::check): Call file_get_fnoi rather than
NtQueryInformationFile to collect a FILE_NETWORK_OPEN_INFORMATION block.
* path.h (file_get_fnoi): Declare.
(wow64_started_from_native64): New function to check if a WOW64
process got started from a native 64 bit process.
(respawn_wow64_process): New function to respawn process.
(dll_crt0_0): When started from a native parent, check if parent
is a 64 bit process. If so, return early.
(_dll_crt0): Respawn WOW64 process here if required.
* init.cc (respawn_wow64_process): Remove.
(dll_entry): Rename wow64_test_stack_marker to test_stack_marker.
Drop WOW64 test here.
since this isn't a "syscall".
(pipe_worker): New function created from _pipe().
(_pipe): Use pipe_worker to create a pipe. Use standard syscall strace
reporting on exit.
(pipe): Ditto.
(pipe2): 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.
_my_tls.remove along with a comment.
(sigpacket::process): Remove code which now causes a gdb deadlock.
* sigproc.cc (_cygtls::signal_exit): Signal debugger with signal number
earlier.
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.
Christopher Faylor
Corinna Vinschen
Keith Marshall