/* src/vm/signal.c - machine independent signal functions
- Copyright (C) 1996-2005, 2006, 2007 R. Grafl, A. Krall, C. Kruegel,
- C. Oates, R. Obermaisser, M. Platter, M. Probst, S. Ring,
- E. Steiner, C. Thalinger, D. Thuernbeck, P. Tomsich, C. Ullrich,
- J. Wenninger, Institut f. Computersprachen - TU Wien
+ Copyright (C) 1996-2005, 2006, 2007, 2008
+ CACAOVM - Verein zur Foerderung der freien virtuellen Maschine CACAO
This file is part of CACAO.
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301, USA.
- $Id: signal.c 7601 2007-03-28 23:02:50Z michi $
-
*/
#include "config.h"
-#include <errno.h>
+#include <assert.h>
#include <signal.h>
+#include <stdint.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>
+# include <sys/utsname.h>
#endif
-#include "vm/types.h"
-
#include "arch.h"
-#include "mm/memory.h"
-
-#if defined(ENABLE_THREADS)
-# include "threads/threads-common.h"
+#if defined(ENABLE_GC_BOEHM)
+# include "mm/memory.h"
#endif
+#include "threads/thread.hpp"
+
+#include "vm/exceptions.hpp"
#include "vm/signallocal.h"
-#include "vm/vm.h"
+#include "vm/vm.hpp"
#include "vmcore/options.h"
-
-/* global variables ***********************************************************/
-
-#if defined(ENABLE_THREADS)
-static threadobject *thread_signal;
+#if defined(ENABLE_STATISTICS)
+# include "vmcore/statistics.h"
#endif
*******************************************************************************/
-void signal_init(void)
+bool signal_init(void)
{
#if !defined(__CYGWIN__)
- int pagesize;
- sigset_t mask;
- struct sigaction act;
-
- /* mmap a memory page at address 0x0, so our hardware-exceptions
- work. */
+ sigset_t mask;
- pagesize = getpagesize();
+ TRACESUBSYSTEMINITIALIZATION("signal_init");
- (void) memory_mmap_anon(NULL, pagesize, PROT_NONE, MAP_PRIVATE | MAP_FIXED);
+#if defined(__LINUX__) && defined(ENABLE_THREADS)
+ /* XXX Remove for exact-GC. */
+ if (threads_pthreads_implementation_nptl) {
+#endif
/* Block the following signals (SIGINT for <ctrl>-c, SIGQUIT for
<ctrl>-\). We enable them later in signal_thread, but only for
this thread. */
if (sigemptyset(&mask) != 0)
- vm_abort("signal_init: sigemptyset failed: %s", strerror(errno));
+ vm_abort_errno("signal_init: sigemptyset failed");
+
+#if !defined(WITH_JAVA_RUNTIME_LIBRARY_OPENJDK)
+ /* Let OpenJDK handle SIGINT itself. */
if (sigaddset(&mask, SIGINT) != 0)
- vm_abort("signal_init: sigaddset failed: %s", strerror(errno));
+ vm_abort_errno("signal_init: sigaddset failed");
+#endif
#if !defined(__FREEBSD__)
if (sigaddset(&mask, SIGQUIT) != 0)
- vm_abort("signal_init: sigaddset failed: %s", strerror(errno));
+ vm_abort_errno("signal_init: sigaddset failed");
#endif
if (sigprocmask(SIG_BLOCK, &mask, NULL) != 0)
- vm_abort("signal_init: sigprocmask failed: %s", strerror(errno));
+ vm_abort_errno("signal_init: sigprocmask failed");
+
+#if defined(__LINUX__) && defined(ENABLE_THREADS)
+ /* XXX Remove for exact-GC. */
+ }
+#endif
#if defined(ENABLE_GC_BOEHM)
/* Allocate something so the garbage collector's signal handlers
are installed. */
- (void) GCNEW(u1);
+ (void) GCNEW(int);
#endif
/* Install signal handlers for signals we want to catch in all
threads. */
- sigemptyset(&act.sa_mask);
-
#if defined(ENABLE_JIT)
# if defined(ENABLE_INTRP)
if (!opt_intrp) {
# endif
/* SIGSEGV handler */
- act.sa_sigaction = md_signal_handler_sigsegv;
- act.sa_flags = SA_NODEFER | SA_SIGINFO;
-
-# if defined(SIGSEGV)
- sigaction(SIGSEGV, &act, NULL);
-# endif
+ signal_register_signal(SIGSEGV, (functionptr) md_signal_handler_sigsegv,
+ SA_NODEFER | SA_SIGINFO);
# if defined(SIGBUS)
- sigaction(SIGBUS, &act, NULL);
+ signal_register_signal(SIGBUS, (functionptr) md_signal_handler_sigsegv,
+ SA_NODEFER | SA_SIGINFO);
# endif
# if SUPPORT_HARDWARE_DIVIDE_BY_ZERO
/* SIGFPE handler */
- act.sa_sigaction = md_signal_handler_sigfpe;
- act.sa_flags = SA_NODEFER | SA_SIGINFO;
- sigaction(SIGFPE, &act, NULL);
+ signal_register_signal(SIGFPE, (functionptr) md_signal_handler_sigfpe,
+ SA_NODEFER | SA_SIGINFO);
# endif
-# if defined(__ARM__)
+# if defined(__ARM__) || defined(__I386__) || defined(__S390__) || defined(__X86_64__) || defined(__M68K__)
/* XXX use better defines for that (in arch.h) */
/* SIGILL handler */
- act.sa_sigaction = md_signal_handler_sigill;
- act.sa_flags = SA_NODEFER | SA_SIGINFO;
- sigaction(SIGILL, &act, NULL);
+ signal_register_signal(SIGILL, (functionptr) md_signal_handler_sigill,
+ SA_NODEFER | SA_SIGINFO);
# endif
# if defined(__POWERPC__)
/* XXX use better defines for that (in arch.h) */
/* SIGTRAP handler */
- act.sa_sigaction = md_signal_handler_sigtrap;
- act.sa_flags = SA_NODEFER | SA_SIGINFO;
- sigaction(SIGTRAP, &act, NULL);
+ signal_register_signal(SIGTRAP, (functionptr) md_signal_handler_sigtrap,
+ SA_NODEFER | SA_SIGINFO);
# endif
# if defined(ENABLE_INTRP)
}
# endif
-#endif /* !defined(ENABLE_INTRP) */
+
+#if defined(__DARWIN__)
+ do {
+ struct utsname name;
+ kern_return_t kr;
+
+ /* Check if we're on 10.4 (Tiger/8.x) or earlier */
+ if (uname(&name) != 0)
+ break;
+
+ /* Make sure the string is large enough */
+ /* Check the major number (ascii comparison) */
+ /* Verify that we're not looking at '10.' by checking for a trailing period. */
+ if (name.release[0] == '\0' || name.release[0] > '8' || name.release[1] != '.')
+ break;
+
+ /* Reset CrashReporter's task signal handler */
+ kr = task_set_exception_ports(mach_task_self(),
+ EXC_MASK_BAD_ACCESS
+# if defined(__I386__)
+ | EXC_MASK_BAD_INSTRUCTION
+#endif
+ , MACH_PORT_NULL,
+ EXCEPTION_STATE_IDENTITY,
+ MACHINE_THREAD_STATE);
+
+ assert(kr == KERN_SUCCESS);
+ } while (false);
+#endif
+#endif /* !defined(ENABLE_JIT) */
#if defined(ENABLE_THREADS)
/* SIGHUP handler for threads_thread_interrupt */
- act.sa_sigaction = signal_handler_sighup;
- act.sa_flags = 0;
- sigaction(SIGHUP, &act, NULL);
+ signal_register_signal(SIGHUP, (functionptr) signal_handler_sighup, 0);
#endif
#if defined(ENABLE_THREADS) && defined(ENABLE_GC_CACAO)
/* SIGUSR1 handler for the exact GC to suspend threads */
- act.sa_sigaction = md_signal_handler_sigusr1;
- act.sa_flags = SA_SIGINFO;
- sigaction(SIGUSR1, &act, NULL);
+ signal_register_signal(SIGUSR1, (functionptr) md_signal_handler_sigusr1,
+ SA_SIGINFO);
#endif
#if defined(ENABLE_THREADS) && defined(ENABLE_PROFILING)
/* SIGUSR2 handler for profiling sampling */
- act.sa_sigaction = md_signal_handler_sigusr2;
- act.sa_flags = SA_SIGINFO;
- sigaction(SIGUSR2, &act, NULL);
+ signal_register_signal(SIGUSR2, (functionptr) md_signal_handler_sigusr2,
+ SA_SIGINFO);
#endif
#endif /* !defined(__CYGWIN__) */
+
+ return true;
+}
+
+
+/* signal_register_signal ******************************************************
+
+ Register the specified handler with the specified signal.
+
+*******************************************************************************/
+
+void signal_register_signal(int signum, functionptr handler, int flags)
+{
+ struct sigaction act;
+
+ void (*function)(int, siginfo_t *, void *);
+
+ function = (void (*)(int, siginfo_t *, void *)) handler;
+
+ if (sigemptyset(&act.sa_mask) != 0)
+ vm_abort_errno("signal_register_signal: sigemptyset failed");
+
+ act.sa_sigaction = function;
+ act.sa_flags = flags;
+
+ if (sigaction(signum, &act, NULL) != 0)
+ vm_abort_errno("signal_register_signal: sigaction failed");
}
This thread sets the signal mask to catch the user input signals
(SIGINT, SIGQUIT). We use such a thread, so we don't get the
- signals on every single thread running. Especially, this makes
- problems on slow machines.
+ signals on every single thread running.
*******************************************************************************/
static void signal_thread(void)
{
- sigset_t mask;
- int sig;
+ threadobject *t;
+ sigset_t mask;
+ int sig;
+
+ t = THREADOBJECT;
if (sigemptyset(&mask) != 0)
- vm_abort("signal_thread: sigemptyset failed: %s", strerror(errno));
+ vm_abort_errno("signal_thread: sigemptyset failed");
+
+#if !defined(WITH_JAVA_RUNTIME_LIBRARY_OPENJDK)
+ /* Let OpenJDK handle SIGINT itself. */
+
+ if (sigaddset(&mask, SIGINT) != 0)
+ vm_abort_errno("signal_thread: sigaddset failed");
+#endif
- sigaddset(&mask, SIGINT);
#if !defined(__FREEBSD__)
- sigaddset(&mask, SIGQUIT);
+ if (sigaddset(&mask, SIGQUIT) != 0)
+ vm_abort_errno("signal_thread: sigaddset failed");
#endif
- while (true) {
+ for (;;) {
/* just wait for a signal */
+#if defined(ENABLE_THREADS)
+ thread_set_state_waiting(t);
+#endif
+
+ /* XXX We don't check for an error here, although the man-page
+ states sigwait does not return an error (which is wrong!),
+ but it seems to make problems with Boehm-GC. We should
+ revisit this code with our new exact-GC. */
+
+/* if (sigwait(&mask, &sig) != 0) */
+/* vm_abort_errno("signal_thread: sigwait failed"); */
(void) sigwait(&mask, &sig);
- switch (sig) {
- case SIGINT:
- /* exit the vm properly */
+#if defined(ENABLE_THREADS)
+ thread_set_state_runnable(t);
+#endif
- vm_exit(0);
- break;
+ /* Handle the signal. */
+
+ signal_thread_handler(sig);
+ }
+}
+
+
+/* signal_thread_handler *******************************************************
+
+ Handles the signals caught in the signal handler thread. Also used
+ from sun.misc.Signal with OpenJDK.
+
+*******************************************************************************/
- case SIGQUIT:
- /* print a thread dump */
+void signal_thread_handler(int sig)
+{
+ switch (sig) {
+ case SIGINT:
+ /* exit the vm properly */
+
+ vm_exit(1);
+ break;
+
+ case SIGQUIT:
+ /* print a thread dump */
#if defined(ENABLE_THREADS)
- threads_dump();
+ threads_dump();
#endif
#if defined(ENABLE_STATISTICS)
- if (opt_stat)
- statistics_print_memory_usage();
+ if (opt_stat)
+ statistics_print_memory_usage();
#endif
- break;
- }
+ break;
}
-
- /* this should not happen */
-
- vm_abort("signal_thread: this thread should not exit!");
}
name = utf_new_char("Signal Handler");
- thread_signal = threads_create_thread(name);
-
- if (thread_signal == NULL)
+ if (!threads_thread_start_internal(name, signal_thread))
return false;
- /* actually start the signal handler thread */
-
- threads_start_thread(thread_signal, signal_thread);
-
/* everything's ok */
return true;
projects / cacao.git / blobdiff