static void initialize_signal_handler()
{
# ifdef NEED_OSX_MACH_HANDLER
macosx_init_exception_handler();
# endif
# ifdef NEED_SIGACTION
{
struct sigaction act, oact;
memset(&act, 0, sizeof(sigaction));
act.sa_sigaction = fault_handler;
sigemptyset(&act.sa_mask);
/* In MzScheme, SIGCHLD or SIGINT handling may trigger a write barrier: */
sigaddset(&act.sa_mask, SIGINT);
sigaddset(&act.sa_mask, SIGCHLD);
act.sa_flags = SA_SIGINFO;
sigaction(USE_SIGACTON_SIGNAL_KIND, &act, &oact);
}
# endif
# ifdef NEED_SIGWIN
{
HMODULE hm;
PVOID (WINAPI*aveh)(ULONG, gcPVECTORED_EXCEPTION_HANDLER);
hm = LoadLibrary("kernel32.dll");
if (hm)
aveh = (PVOID (WINAPI*)(ULONG, gcPVECTORED_EXCEPTION_HANDLER))GetProcAddress(hm, "AddVectoredExceptionHandler");
else
aveh = NULL;
if (aveh)
aveh(TRUE, fault_handler);
else
generations_available = 0;
}
# endif
}
static void initialize_signal_handler(GCTYPE *gc)
{
# ifdef NEED_OSX_MACH_HANDLER
# if defined(MZ_USE_PLACES) && defined(MZ_PRECISE_GC)
macosx_init_exception_handler(MASTERGC == 0);
# else
macosx_init_exception_handler(1);
# endif
# endif
# ifdef NEED_SIGSTACK
{
stack_t ss;
uintptr_t sz = 10*SIGSTKSZ;
ss.ss_sp = malloc(sz);
ss.ss_size = sz;
ss.ss_flags = 0;
sigaltstack(&ss, NULL);
}
# endif
# ifdef NEED_SIGACTION
{
struct sigaction act, oact;
memset(&act, 0, sizeof(act));
act.sa_sigaction = fault_handler;
sigemptyset(&act.sa_mask);
/* In Racket, SIGCHLD or SIGINT handling may trigger a write barrier: */
sigaddset(&act.sa_mask, SIGINT);
sigaddset(&act.sa_mask, SIGCHLD);
act.sa_flags = SA_SIGINFO;
# ifdef NEED_SIGSTACK
act.sa_flags |= SA_ONSTACK;
# endif
sigaction(USE_SIGACTON_SIGNAL_KIND, &act, &oact);
# ifdef USE_ANOTHER_SIGACTON_SIGNAL_KIND
sigaction(USE_ANOTHER_SIGACTON_SIGNAL_KIND, &act, &oact);
# endif
}
# endif
# ifdef NEED_SIGWIN
{
HMODULE hm;
PVOID (WINAPI*aveh)(ULONG, gcPVECTORED_EXCEPTION_HANDLER);
hm = LoadLibrary("kernel32.dll");
if (hm)
aveh = (PVOID (WINAPI*)(ULONG, gcPVECTORED_EXCEPTION_HANDLER))GetProcAddress(hm, "AddVectoredExceptionHandler");
else
aveh = NULL;
if (aveh)
aveh(TRUE, fault_handler);
else /* older than Windows XP */
gc->generations_available = 0;
}
# endif
}