9661a0c8b7
queried in waitsig later. * sigproc.cc (wait_sig): Don't deliver a signal if in a vfork. * fork.cc (vfork): Deliver all signals on parent return from vfork.
127 lines
3.1 KiB
C++
127 lines
3.1 KiB
C++
/* sigproc.h
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Copyright 1997, 1998, 2000, 2001 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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#include <signal.h>
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#define EXIT_SIGNAL 0x010000
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#define EXIT_REPARENTING 0x020000
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#define EXIT_NOCLOSEALL 0x040000
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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_CHILDTERMINATED = 2, // a child died
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PROC_CLEARWAIT = 3, // clear all waits - signal arrived
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PROC_WAIT = 4, // setup for wait() for subproc
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PROC_NOTHING = 5 // nothing, really
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};
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typedef struct struct_waitq
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{
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int pid;
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int options;
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int status;
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HANDLE ev;
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void *rusage; /* pointer to potential rusage */
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struct struct_waitq *next;
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HANDLE thread_ev;
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} waitq;
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struct sigthread
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{
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DWORD id;
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DWORD frame;
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CRITICAL_SECTION lock;
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LONG winapi_lock;
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BOOL exception;
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bool get_winapi_lock (int test = 0);
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void release_winapi_lock ();
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void init (const char *s);
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};
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class sigframe
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{
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private:
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sigthread *st;
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bool unregister ()
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{
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if (!st)
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return 0;
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EnterCriticalSection (&st->lock);
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st->frame = 0;
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st->exception = 0;
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st->release_winapi_lock ();
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LeaveCriticalSection (&st->lock);
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st = NULL;
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return 1;
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}
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public:
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void set (sigthread &t, DWORD ebp, bool is_exception = 0)
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{
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DWORD oframe = t.frame;
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st = &t;
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t.frame = ebp;
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t.exception = is_exception;
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if (!oframe)
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t.get_winapi_lock ();
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}
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sigframe (): st (NULL) {}
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sigframe (sigthread &t, DWORD ebp = (DWORD) __builtin_frame_address (0)) {init (t, ebp);}
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void init (sigthread &t, DWORD ebp = (DWORD) __builtin_frame_address (0))
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{
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if (!t.frame && t.id == GetCurrentThreadId ())
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set (t, ebp);
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else
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st = NULL;
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}
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~sigframe ()
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{
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unregister ();
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}
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int call_signal_handler ();
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};
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extern sigthread mainthread;
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extern HANDLE signal_arrived;
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BOOL __stdcall my_parent_is_alive ();
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extern "C" int __stdcall sig_dispatch_pending (int force = FALSE);
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extern "C" void __stdcall set_process_mask (sigset_t newmask);
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extern "C" void __stdcall reset_signal_arrived ();
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int __stdcall sig_handle (int);
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void __stdcall sig_clear (int);
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void __stdcall sig_set_pending (int);
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int __stdcall handle_sigsuspend (sigset_t);
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int __stdcall proc_subproc (DWORD, DWORD);
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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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void __stdcall subproc_init ();
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void __stdcall sigproc_terminate ();
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BOOL __stdcall proc_exists (_pinfo *) __attribute__ ((regparm(1)));
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BOOL __stdcall pid_exists (pid_t) __attribute__ ((regparm(1)));
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int __stdcall sig_send (_pinfo *, int, DWORD ebp = (DWORD) __builtin_frame_address (0),
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bool exception = 0) __attribute__ ((regparm(3)));
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void __stdcall signal_fixup_after_fork ();
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void __stdcall signal_fixup_after_exec (bool);
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extern char myself_nowait_dummy[];
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extern char myself_nowait_nonmain_dummy[];
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#define WAIT_SIG_EXITING (WAIT_OBJECT_0 + 1)
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#define myself_nowait ((_pinfo *)myself_nowait_dummy)
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#define myself_nowait_nonmain ((_pinfo *)myself_nowait_nonmain_dummy)
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