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* dcrt0.cc (jit_debug): New global.

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(initial_env): Set jit_debug when we are automatically starting a gdb process.
* dtable.cc (dtable::get_debugger_info): Don't tty tricks when we are being
debugged by our own captive gdb, as determined by jit_debug == true.
(dtable::init_std_file_from_handle): Detect errors when initializing a tty
early rather than at random points later.
* fhandler.h (fhandler_*::init): Return int to indicate success/failure.
* fhandler.cc (fhandler_base::init): Reflect change in return value.
* pipe.cc (fhandler_pipe::init): Ditto.
(fhandler_pipe::create_selectable): Don't say we're retrying when we aren't.
* fhandler_console.cc (fhandler_console::init): Ditto.  Return success/failure.
* fhandler_serial.cc (fhandler_serial::init): Ditto.
* fhandler_tty.cc (fhandler_tty_slave::init): Ditto.
(fhandler_tty_slave::open): Make debugging output more detailed.
* tty.cc (tty_list::terminate): Don't close I/O handles before all slaves have
checked in.
(tty::slave_alive): Make a non-inlined function.  Check if tty pipe handles can
be created as an additional exists check.
* tty.h (tty::slave_alive): Just define here.
This commit is contained in:
Christopher Faylor
2009-07-03 18:05:51 +00:00
parent 3e62013829
commit 3c4f2024a1
11 changed files with 85 additions and 38 deletions
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34
winsup/cygwin/tty.cc
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@@ -147,8 +147,6 @@ tty_list::terminate ()
if (ttynum != -1 && tty_master && ttys[ttynum].master_pid == myself->pid)
{
tty *t = ttys + ttynum;
CloseHandle (tty_master->from_master);
CloseHandle (tty_master->to_master);
/* Wait for children which rely on tty handling in this process to
go away */
for (int i = 0; ; i++)
@@ -166,6 +164,8 @@ tty_list::terminate ()
}
lock_ttys here ();
CloseHandle (tty_master->from_master);
CloseHandle (tty_master->to_master);
termios_printf ("tty %d master about to finish", ttynum);
CloseHandle (tty_master->get_io_handle ());
@@ -209,7 +209,7 @@ tty_list::init ()
/* Search for tty class for our console. Allocate new tty if our process is
the only cygwin process in the current console.
Return tty number or -1 if error.
If flag == 0, just find a free tty.
If with_console == 0, just find a free tty.
*/
int
tty_list::allocate (bool with_console)
@@ -218,8 +218,6 @@ tty_list::allocate (bool with_console)
int freetty = -1;
HANDLE hmaster = NULL;
/* FIXME: This whole function needs a protective mutex. */
lock_ttys here;
if (!with_console)
@@ -261,7 +259,7 @@ tty_list::allocate (bool with_console)
}
}
/* There is no tty allocated to console, allocate the first free found */
/* There is no tty allocated to console; allocate the first free found */
if (freetty == -1)
goto out;
@@ -294,6 +292,30 @@ tty::slave_alive ()
return alive (TTY_SLAVE_ALIVE);
}
bool
tty::exists ()
{
/* Attempt to open the from-master side of the tty. If it is accessible
then it exists although it may have been privileges to actually use it. */
char pipename[sizeof("ttyNNNN-from-master")];
__small_sprintf (pipename, "tty%d-from-master", ntty);
HANDLE r, w;
int res = fhandler_pipe::create_selectable (&sec_none_nih, r, w, 0, pipename);
if (res)
return true;
CloseHandle (r);
CloseHandle (w);
HANDLE h = open_output_mutex ();
if (h)
{
CloseHandle (h);
return true;
}
return slave_alive ();
}
bool
tty::alive (const char *fmt)
{