45d7b637fa
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.
130 lines
3.4 KiB
C++
130 lines
3.4 KiB
C++
/* sigproc.h
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Copyright 1997, 1998, 2000, 2001, 2002, 2003, 2004, 2005, 2006,
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2011 Red Hat, Inc.
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This file is part of Cygwin.
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This software is a copyrighted work licensed under the terms of the
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Cygwin license. Please consult the file "CYGWIN_LICENSE" for
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details. */
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#ifndef _SIGPROC_H
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#define _SIGPROC_H
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#include <signal.h>
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#ifdef NSIG
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enum
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{
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__SIGFLUSH = -(NSIG + 1),
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__SIGSTRACE = -(NSIG + 2),
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__SIGCOMMUNE = -(NSIG + 3),
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__SIGPENDING = -(NSIG + 4),
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__SIGDELETE = -(NSIG + 5),
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__SIGFLUSHFAST = -(NSIG + 6),
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__SIGHOLD = -(NSIG + 7),
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__SIGNOHOLD = -(NSIG + 8),
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__SIGEXIT = -(NSIG + 9),
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__SIGSETPGRP = -(NSIG + 10)
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};
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#endif
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#define SIG_BAD_MASK (1 << (SIGKILL - 1))
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enum procstuff
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{
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PROC_ADDCHILD = 1, // add a new subprocess to list
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PROC_REATTACH_CHILD = 2, // reattach after exec
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PROC_EXEC_CLEANUP = 3, // cleanup waiting children after exec
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PROC_DETACHED_CHILD = 4, // set up a detached child
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PROC_CLEARWAIT = 5, // clear all waits - signal arrived
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PROC_WAIT = 6, // setup for wait() for subproc
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PROC_EXECING = 7, // used to get a lock when execing
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PROC_NOTHING = 8 // nothing, really
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};
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struct sigpacket
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{
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siginfo_t si;
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pid_t pid;
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class _cygtls *tls;
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sigset_t *mask;
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union
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{
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HANDLE wakeup;
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HANDLE thread_handle;
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struct sigpacket *next;
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};
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int __stdcall process () __attribute__ ((regparm (1)));
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};
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extern HANDLE signal_arrived;
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extern HANDLE sigCONT;
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void __stdcall sig_dispatch_pending (bool fast = false);
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#ifdef _PINFO_H
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extern "C" void __stdcall set_signal_mask (sigset_t newmask, sigset_t&);
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#endif
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int __stdcall handle_sigprocmask (int sig, const sigset_t *set,
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sigset_t *oldset, sigset_t& opmask)
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__attribute__ ((regparm (3)));
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void __stdcall sig_clear (int) __attribute__ ((regparm (1)));
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void __stdcall sig_set_pending (int) __attribute__ ((regparm (1)));
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int __stdcall handle_sigsuspend (sigset_t);
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int __stdcall proc_subproc (DWORD, DWORD) __attribute__ ((regparm (2)));
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class _pinfo;
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void __stdcall proc_terminate ();
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void __stdcall sigproc_init ();
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#ifdef __INSIDE_CYGWIN__
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void __stdcall sigproc_terminate (enum exit_states);
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static inline DWORD __attribute__ ((always_inline))
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cygwait (HANDLE h, DWORD howlong = INFINITE)
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{
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HANDLE w4[3];
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DWORD n = 0;
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DWORD wait_signal;
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if ((w4[n] = h) == NULL)
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wait_signal = WAIT_OBJECT_0 + 15; /* Arbitrary. Don't call signal
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handler if only waiting for signal */
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else
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{
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n++;
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wait_signal = n;
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}
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w4[n++] = signal_arrived;
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if ((w4[n] = pthread::get_cancel_event ()) != NULL)
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n++;
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DWORD res;
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while ((res = WaitForMultipleObjects (n, w4, FALSE, howlong)) == wait_signal
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&& (_my_tls.call_signal_handler () || &_my_tls != _main_tls))
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continue;
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return res;
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}
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static inline DWORD __attribute__ ((always_inline))
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cygwait (DWORD wait)
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{
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return cygwait ((HANDLE) NULL, wait);
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}
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#endif
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bool __stdcall pid_exists (pid_t) __attribute__ ((regparm(1)));
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int __stdcall sig_send (_pinfo *, siginfo_t&, class _cygtls *tls = NULL) __attribute__ ((regparm (3)));
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int __stdcall sig_send (_pinfo *, int) __attribute__ ((regparm (2)));
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void __stdcall signal_fixup_after_exec ();
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void __stdcall sigalloc ();
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void __stdcall create_signal_arrived ();
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int kill_pgrp (pid_t, siginfo_t&);
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int killsys (pid_t, int);
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extern char myself_nowait_dummy[];
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extern struct sigaction *global_sigs;
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#define myself_nowait ((_pinfo *) myself_nowait_dummy)
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#endif /*_SIGPROC_H*/
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