Authors: Christian Thalinger
- Changes:
-
- $Id: signal.c 5805 2006-10-19 09:32:29Z twisti $
+ $Id: signal.c 6256 2006-12-28 12:30:09Z twisti $
*/
#include "config.h"
+#include <errno.h>
#include <signal.h>
#include <stdlib.h>
+#include <unistd.h>
+#include <sys/mman.h>
+
+#if defined(__DARWIN__)
+/* If we compile with -ansi on darwin, <sys/types.h> is not
+ included. So let's do it here. */
+# include <sys/types.h>
+#endif
#include "vm/types.h"
# include "threads/native/threads.h"
#endif
+#include "mm/memory.h"
#include "vm/signallocal.h"
#include "vm/options.h"
#include "vm/vm.h"
/* function prototypes ********************************************************/
-void signal_handler_sigquit(int sig, siginfo_t *siginfo, void *_p);
+void signal_handler_sighup(int sig, siginfo_t *siginfo, void *_p);
void signal_handler_sigint(int sig, siginfo_t *siginfo, void *_p);
+void signal_handler_sigquit(int sig, siginfo_t *siginfo, void *_p);
/* signal_init *****************************************************************
void signal_init(void)
{
#if !defined(__CYGWIN__)
+ int pagesize;
struct sigaction act;
+ /* mmap a memory page at address 0x0, so our hardware-exceptions
+ work. */
+
+ pagesize = getpagesize();
+
+ (void) memory_mmap_anon(NULL, pagesize, PROT_NONE, MAP_PRIVATE | MAP_FIXED);
+
+#if defined(ENABLE_GC_BOEHM)
+ /* Allocate something so the garbage collector's signal handlers
+ are installed. */
+
+ (void) GCNEW(u1);
+#endif
+
/* install signal handlers we need to convert to exceptions */
sigemptyset(&act.sa_mask);
-
#if defined(ENABLE_JIT)
# if defined(ENABLE_INTRP)
if (!opt_intrp) {
# endif
/* catch NullPointerException/StackOverFlowException */
- if (!checknull) {
- act.sa_sigaction = md_signal_handler_sigsegv;
- act.sa_flags = SA_NODEFER | SA_SIGINFO;
+ act.sa_sigaction = md_signal_handler_sigsegv;
+ act.sa_flags = SA_NODEFER | SA_SIGINFO;
#if defined(SIGSEGV)
- sigaction(SIGSEGV, &act, NULL);
+ sigaction(SIGSEGV, &act, NULL);
#endif
#if defined(SIGBUS)
- sigaction(SIGBUS, &act, NULL);
+ sigaction(SIGBUS, &act, NULL);
#endif
- }
-
/* catch ArithmeticException */
-#if defined(__I386__) || defined(__X86_64__)
+#if SUPPORT_HARDWARE_DIVIDE_BY_ZERO
act.sa_sigaction = md_signal_handler_sigfpe;
- act.sa_flags = SA_NODEFER | SA_SIGINFO;
+ act.sa_flags = SA_NODEFER | SA_SIGINFO;
sigaction(SIGFPE, &act, NULL);
#endif
# if defined(ENABLE_INTRP)
# endif
#endif /* !defined(ENABLE_INTRP) */
+#if defined(ENABLE_THREADS)
+ /* catch SIGHUP for threads_thread_interrupt */
+
+ act.sa_sigaction = signal_handler_sighup;
+ act.sa_flags = 0;
+ sigaction(SIGHUP, &act, NULL);
+#endif
/* catch SIGINT for exiting properly on <ctrl>-c */
act.sa_sigaction = signal_handler_sigint;
- act.sa_flags = SA_NODEFER | SA_SIGINFO;
+ act.sa_flags = SA_NODEFER | SA_SIGINFO;
sigaction(SIGINT, &act, NULL);
-
+#if defined(ENABLE_THREADS)
/* catch SIGQUIT for thread dump */
-#if defined(ENABLE_THREADS)
# if !defined(__FREEBSD__)
act.sa_sigaction = signal_handler_sigquit;
- act.sa_flags = SA_SIGINFO;
+ act.sa_flags = SA_SIGINFO;
sigaction(SIGQUIT, &act, NULL);
# endif
#endif
/* install signal handler for profiling sampling */
act.sa_sigaction = md_signal_handler_sigusr2;
- act.sa_flags = SA_SIGINFO;
+ act.sa_flags = SA_SIGINFO;
sigaction(SIGUSR2, &act, NULL);
#endif
}
+/* signal_handler_sighup *******************************************************
+
+ This handler is required by threads_thread_interrupt and does
+ nothing.
+
+*******************************************************************************/
+
+#if defined(ENABLE_THREADS)
+void signal_handler_sighup(int sig, siginfo_t *siginfo, void *_p)
+{
+ /* do nothing */
+}
+#endif
+
+
/* signal_handler_sigquit ******************************************************
- XXX
+ Handle for SIGQUIT (<ctrl>-\) which print a stacktrace for every
+ running thread.
*******************************************************************************/