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Implement fhandler reference counting.

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* 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.
This commit is contained in:
Christopher Faylor
2011-12-17 00:03:31 +00:00
parent 6eee66418c
commit ca35d41cec
9 changed files with 141 additions and 46 deletions
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48
winsup/cygwin/ChangeLog
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@@ -1,3 +1,51 @@
2011-12-16 Christopher Faylor <me.cygwin2011@cgf.cx>
Implement fhandler reference counting.
* 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.
2011-12-16 Corinna Vinschen <vinschen@redhat.com>
* dcrt0.cc (child_info_fork::alloc_stack): Correctly check if the