libjava/include/posix-signal.h

   1 // posix-signal.h - Catch runtime signals and turn them into exceptions.
   2
   3 /* Copyright (C) 1998, 1999, 2000, 2009, 2011, 2012 Free Software Foundation
   4
   5    This file is part of libgcj.
   6
   7 This software is copyrighted work licensed under the terms of the
   8 Libgcj License.  Please consult the file "LIBGCJ_LICENSE" for
   9 details.  */
  10
  11 #ifndef JAVA_SIGNAL_H
  12 #define JAVA_SIGNAL_H 1
  13
  14 #include <signal.h>
  15
  16 #define HANDLE_SEGV 1
  17 #define HANDLE_FPE 1
  18
  19 /* Different implementations of MD_FALLBACK_FRAME_STATE_FOR either require
  20    SA_SIGINFO being set or fail if so.  Cf. gcc/ada/init.c
  21    (__gnat_install_handler) for details.  */
  22
  23 #if defined __sun__ && defined __svr4__
  24 #define SA_FLAGS SA_NODEFER | SA_SIGINFO
  25 #else
  26 #error Must define SA_FLAGS.
  27 #endif
  28
  29 #if SA_FLAGS & SA_SIGINFO
  30 #define SIGNAL_HANDLER(_name)                                           \
  31 static void _Jv_##_name (int,                                           \
  32                          siginfo_t *_si __attribute__ ((__unused__)),   \
  33                          void *_uc __attribute__ ((__unused__)))
  34 #define sa_signal_handler sa_sigaction
  35 #else
  36 #define SIGNAL_HANDLER(_name)                                           \
  37 static void _Jv_##_name (int)
  38 #define sa_signal_handler sa_handler
  39 #endif
  40
  41 #define MAKE_THROW_FRAME(_exception)
  42
  43 #define _INIT_SIG_HANDLER(_SIG, _ACTION)                                \
  44 do                                                                      \
  45   {                                                                     \
  46     struct sigaction act;                                               \
  47     act.sa_signal_handler = _Jv_##_ACTION;                              \
  48     act.sa_flags = SA_FLAGS;                                            \
  49     sigemptyset (&act.sa_mask);                                         \
  50     sigaction(_SIG, &act, NULL);                                        \
  51   }                                                                     \
  52 while (0)
  53
  54 #define INIT_SEGV       _INIT_SIG_HANDLER (SIGSEGV, catch_segv)
  55 #define INIT_FPE        _INIT_SIG_HANDLER (SIGFPE, catch_fpe)
  56
  57 #endif /* JAVA_SIGNAL_H */