Authors: Christian Thalinger
- Changes:
-
- $Id: signal.c 4357 2006-01-22 23:33:38Z 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>
-#include "vm/types.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 "cacao/cacao.h"
+#include "vm/types.h"
-#if defined(USE_THREADS) && defined(NATIVE_THREADS)
+#if defined(ENABLE_THREADS)
# include "threads/native/threads.h"
#endif
+#include "mm/memory.h"
#include "vm/signallocal.h"
#include "vm/options.h"
+#include "vm/vm.h"
#include "vm/jit/stacktrace.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_sigusr1(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(USE_THREADS) && defined(NATIVE_THREADS)
-#if !defined(__FREEBSD__)
+# 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
- /* XXX boehm uses SIGUSR1 for suspend on freebsd */
+#if defined(ENABLE_THREADS) && defined(ENABLE_PROFILING)
+ /* install signal handler for profiling sampling */
- act.sa_sigaction = signal_handler_sigusr1;
- act.sa_flags = SA_SIGINFO;
- sigaction(SIGUSR1, &act, NULL);
-#endif
+ act.sa_sigaction = md_signal_handler_sigusr2;
+ act.sa_flags = SA_SIGINFO;
+ sigaction(SIGUSR2, &act, NULL);
#endif
+
+#endif /* !defined(__CYGWIN__) */
+}
+
+
+/* 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.
*******************************************************************************/
-#if defined(USE_THREADS) && defined(NATIVE_THREADS)
+#if defined(ENABLE_THREADS)
void signal_handler_sigquit(int sig, siginfo_t *siginfo, void *_p)
{
/* do thread dump */
{
/* if we are already in Runtime.exit(), just do it hardcore */
- if (cacao_exiting) {
- fprintf(stderr, "Catched SIGINT while already shutting down. Shutdown aborted...\n");
+ if (vm_exiting) {
+ fprintf(stderr, "Caught SIGINT while already shutting down. Shutdown aborted...\n");
exit(0);
}
/* exit the vm properly */
- cacao_exit(0);
+ vm_exit(0);
}
-/* signal_handler_sigusr1 ******************************************************
-
- XXX
-
-*******************************************************************************/
-
-#if defined(USE_THREADS) && defined(NATIVE_THREADS)
-void signal_handler_sigusr1(int sig, siginfo_t *siginfo, void *_p)
-{
- /* call stacktrace function */
-
- stacktrace_dump_trace();
-}
-#endif
-
-
/*
* These are local overrides for various environment variables in Emacs.
* Please do not remove this and leave it at the end of the file, where
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