coregrind/pub_core_libcsignal.h

   1
   2 /*--------------------------------------------------------------------*/
   3 /*--- Signal-related libc stuff.             pub_core_libcsignal.h ---*/
   4 /*--------------------------------------------------------------------*/
   5
   6 /*
   7    This file is part of Valgrind, a dynamic binary instrumentation
   8    framework.
   9
  10    Copyright (C) 2000-2017 Julian Seward
  11       jseward@acm.org
  12
  13    This program is free software; you can redistribute it and/or
  14    modify it under the terms of the GNU General Public License as
  15    published by the Free Software Foundation; either version 2 of the
  16    License, or (at your option) any later version.
  17
  18    This program is distributed in the hope that it will be useful, but
  19    WITHOUT ANY WARRANTY; without even the implied warranty of
  20    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  21    General Public License for more details.
  22
  23    You should have received a copy of the GNU General Public License
  24    along with this program; if not, see <http://www.gnu.org/licenses/>.
  25
  26    The GNU General Public License is contained in the file COPYING.
  27 */
  28
  29 #ifndef __PUB_CORE_LIBCSIGNAL_H
  30 #define __PUB_CORE_LIBCSIGNAL_H
  31
  32 //--------------------------------------------------------------------
  33 // PURPOSE: This module contains all the libc code related to signals.
  34 //--------------------------------------------------------------------
  35
  36 #include "pub_tool_libcsignal.h"
  37
  38 /* Note that these use the vki_ (kernel) structure
  39    definitions, which are different in places from those that glibc
  40    defines.  Since we're operating right at the kernel interface, glibc's view
  41    of the world is entirely irrelevant. */
  42
  43 /* --- Signal set ops --- */
  44 extern Int  VG_(sigfillset)  ( vki_sigset_t* set );
  45 extern Int  VG_(sigemptyset) ( vki_sigset_t* set );
  46
  47 extern Bool VG_(isfullsigset)  ( const vki_sigset_t* set );
  48 extern Bool VG_(isemptysigset) ( const vki_sigset_t* set );
  49 extern Bool VG_(iseqsigset)    ( const vki_sigset_t* set1,
  50                                  const vki_sigset_t* set2 );
  51
  52 extern Int  VG_(sigaddset)   ( vki_sigset_t* set, Int signum );
  53 /* VG_(sigdelset) is in pub_tool_libcsignal.h */
  54 extern Int  VG_(sigismember) ( const vki_sigset_t* set, Int signum );
  55
  56 extern void VG_(sigaddset_from_set) ( vki_sigset_t* dst, const vki_sigset_t* src );
  57 extern void VG_(sigdelset_from_set) ( vki_sigset_t* dst, const vki_sigset_t* src );
  58 extern void VG_(sigintersectset)    ( vki_sigset_t* dst, const vki_sigset_t* src );
  59 extern void VG_(sigcomplementset)   ( vki_sigset_t* dst, const vki_sigset_t* src );
  60
  61 /* --- Mess with the kernel's sig state --- */
  62 /* VG_(sigprocmask) is in pub_tool_libcsignal.h. */
  63
  64 extern Int VG_(sigaction)   ( Int signum,
  65                               const vki_sigaction_toK_t* act,
  66                               vki_sigaction_fromK_t* oldact );
  67
  68 /* Convert a sigaction which you got from the kernel (a _fromK_t) to
  69    one which you can give back to the kernel (a _toK_t).  On Linux,
  70    vki_sigaction_{toK,fromK}_t are identical, so this is a no-op
  71    (structure copy), but on Darwin it's not a no-op. */
  72 extern void VG_(convert_sigaction_fromK_to_toK)(
  73                 const vki_sigaction_fromK_t*, /*OUT*/vki_sigaction_toK_t*);
  74
  75
  76 extern Int VG_(kill)        ( Int pid, Int signo );
  77 extern Int VG_(tkill)       ( Int lwpid, Int signo );
  78
  79 /* A cut-down version of POSIX sigtimedwait: poll for pending signals
  80    mentioned in the sigset_t, and if any are present, select one
  81    arbitrarily, return its number (which must be > 0), and put
  82    auxiliary info about it in the siginfo_t, and make it
  83    not-pending-any-more.  If none are pending, return zero.  The _zero
  84    refers to the fact that there is zero timeout, so if no signals are
  85    pending it returns immediately.  Perhaps a better name would be
  86    'sigpoll'.  Returns -1 on error, 0 if no signals pending, and n > 0
  87    if signal n was selected. */
  88 extern Int VG_(sigtimedwait_zero)( const vki_sigset_t *, vki_siginfo_t * );
  89
  90 #endif   // __PUB_CORE_LIBCSIGNAL_H
  91
  92 /*--------------------------------------------------------------------*/
  93 /*--- end                                                          ---*/
  94 /*--------------------------------------------------------------------*/