X-Git-Url: http://wien.tomnetworks.com/gitweb/?a=blobdiff_plain;f=src%2Fvm%2Fsignal.c;h=5d32fb4db306c67be5627028976740ccd0451d9d;hb=4943b35c0f10d680fc428a8e049c34b1ea97a198;hp=7db85dff7958779b9516253452d5e8f896736e44;hpb=103cc7983c8d2473a244f0de1e415602132a2070;p=cacao.git diff --git a/src/vm/signal.c b/src/vm/signal.c index 7db85dff7..5d32fb4db 100644 --- a/src/vm/signal.c +++ b/src/vm/signal.c @@ -1,9 +1,9 @@ /* src/vm/signal.c - machine independent signal functions - Copyright (C) 1996-2005 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 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 This file is part of CACAO. @@ -19,38 +19,58 @@ You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software - Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA - 02111-1307, USA. + Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA + 02110-1301, USA. - Contact: cacao@complang.tuwien.ac.at +*/ - Authors: Christian Thalinger - Changes: +#include "config.h" - $Id: signal.c 2968 2005-07-10 15:18:21Z twisti $ +#include +#include +#include +#include +#include -*/ +#if defined(__DARWIN__) +/* If we compile with -ansi on darwin, is not + included. So let's do it here. */ +# include +#endif +#include "arch.h" -#include +#include "mm/memory.h" -#include "config.h" +#include "native/llni.h" -#if defined(USE_THREADS) && defined(NATIVE_THREADS) -# include "threads/native/threads.h" +#if defined(ENABLE_THREADS) +# include "threads/threads-common.h" +#else +# include "threads/none/threads.h" #endif -#include "vm/options.h" -#include "vm/jit/stacktrace.h" +#include "toolbox/logging.h" + +#include "vm/exceptions.h" +#include "vm/signallocal.h" +#include "vm/vm.h" + +#include "vm/jit/codegen-common.h" +#include "vm/jit/disass.h" +#include "vm/jit/patcher-common.h" + +#include "vmcore/options.h" + +#if defined(ENABLE_STATISTICS) +# include "vmcore/statistics.h" +#endif /* function prototypes ********************************************************/ -void signal_handler_sigsegv(int sig, siginfo_t *siginfo, void *_p); -void signal_handler_sigfpe(int sig, siginfo_t *siginfo, void *_p); -void signal_handler_sigquit(int sig, siginfo_t *siginfo, void *_p); -void signal_handler_sigusr1(int sig, siginfo_t *siginfo, void *_p); +void signal_handler_sighup(int sig, siginfo_t *siginfo, void *_p); /* signal_init ***************************************************************** @@ -59,82 +79,401 @@ void signal_handler_sigusr1(int sig, siginfo_t *siginfo, void *_p); *******************************************************************************/ -void signal_init(void) +bool signal_init(void) { - struct sigaction act; +#if !defined(__CYGWIN__) + sigset_t mask; - /* install signal handlers we need to convert to exceptions */ +#if defined(__LINUX__) && defined(ENABLE_THREADS) + /* XXX Remove for exact-GC. */ + if (threads_pthreads_implementation_nptl) { +#endif - sigemptyset(&act.sa_mask); + /* Block the following signals (SIGINT for -c, SIGQUIT for + -\). 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)); - /* catch NullPointerException/StackOverFlowException */ +#if !defined(WITH_CLASSPATH_SUN) + /* Let OpenJDK handle SIGINT itself. */ - if (!checknull) { - act.sa_sigaction = signal_handler_sigsegv; - act.sa_flags = SA_NODEFER | SA_SIGINFO; + if (sigaddset(&mask, SIGINT) != 0) + vm_abort("signal_init: sigaddset failed: %s", strerror(errno)); +#endif -#if defined(SIGSEGV) - sigaction(SIGSEGV, &act, NULL); +#if !defined(__FREEBSD__) + if (sigaddset(&mask, SIGQUIT) != 0) + vm_abort("signal_init: sigaddset failed: %s", strerror(errno)); #endif -#if defined(SIGBUS) - sigaction(SIGBUS, &act, NULL); + if (sigprocmask(SIG_BLOCK, &mask, NULL) != 0) + vm_abort("signal_init: sigprocmask failed: %s", strerror(errno)); + +#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(int); #endif + + /* Install signal handlers for signals we want to catch in all + threads. */ + +#if defined(ENABLE_JIT) +# if defined(ENABLE_INTRP) + if (!opt_intrp) { +# endif + /* SIGSEGV handler */ + + signal_register_signal(SIGSEGV, (functionptr) md_signal_handler_sigsegv, + SA_NODEFER | SA_SIGINFO); + +# if defined(SIGBUS) + signal_register_signal(SIGBUS, (functionptr) md_signal_handler_sigsegv, + SA_NODEFER | SA_SIGINFO); +# endif + +# if SUPPORT_HARDWARE_DIVIDE_BY_ZERO + /* SIGFPE handler */ + + signal_register_signal(SIGFPE, (functionptr) md_signal_handler_sigfpe, + SA_NODEFER | SA_SIGINFO); +# endif + +# if defined(__ARM__) || defined(__I386__) || defined(__S390__) || defined(__X86_64__) || defined(__M68K__) + /* XXX use better defines for that (in arch.h) */ + /* SIGILL handler */ + + 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 */ + + 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(ENABLE_THREADS) + /* SIGHUP handler for threads_thread_interrupt */ + 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 */ + + signal_register_signal(SIGUSR1, (functionptr) md_signal_handler_sigusr1, + SA_SIGINFO); +#endif - /* catch ArithmeticException */ +#if defined(ENABLE_THREADS) && defined(ENABLE_PROFILING) + /* SIGUSR2 handler for profiling sampling */ -#if defined(__I386__) || defined(__X86_64__) - act.sa_sigaction = signal_handler_sigfpe; - act.sa_flags = SA_NODEFER | SA_SIGINFO; - sigaction(SIGFPE, &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("signal_register_signal: sigemptyset failed: %s", + strerror(errno)); + + act.sa_sigaction = function; + act.sa_flags = flags; + + if (sigaction(signum, &act, NULL) != 0) + vm_abort("signal_register_signal: sigaction failed: %s", + strerror(errno)); +} + + +/* signal_handle *************************************************************** + + Handles the signal caught by a signal handler and calls the correct + function. + +*******************************************************************************/ + +void *signal_handle(int type, intptr_t val, + void *pv, void *sp, void *ra, void *xpc, void *context) +{ + stackframeinfo_t sfi; + int32_t index; + java_handle_t *o; + methodinfo *m; + java_handle_t *p; + + /* Prevent compiler warnings. */ + + o = NULL; + m = NULL; + + /* wrap the value into a handle if it is a reference */ + /* BEFORE: creating stackframeinfo */ + + switch (type) { + case EXCEPTION_HARDWARE_CLASSCAST: + o = LLNI_WRAP((java_object_t *) val); + break; + + case EXCEPTION_HARDWARE_COMPILER: + /* In this case the passed PV points to the compiler stub. We + get the methodinfo pointer here and set PV to NULL so + stacktrace_stackframeinfo_add determines the PV for the + parent Java method. */ + + m = code_get_methodinfo_for_pv(pv); + pv = NULL; + break; + + default: + /* do nothing */ + break; + } + + /* Fill and add a stackframeinfo. */ + + stacktrace_stackframeinfo_add(&sfi, pv, sp, ra, xpc); + + switch (type) { + case EXCEPTION_HARDWARE_NULLPOINTER: + p = exceptions_new_nullpointerexception(); + break; - /* catch SIGQUIT for thread dump */ + case EXCEPTION_HARDWARE_ARITHMETIC: + p = exceptions_new_arithmeticexception(); + break; -#if defined(USE_THREADS) && defined(NATIVE_THREADS) - act.sa_sigaction = signal_handler_sigquit; - act.sa_flags = SA_SIGINFO; - sigaction(SIGQUIT, &act, NULL); + case EXCEPTION_HARDWARE_ARRAYINDEXOUTOFBOUNDS: + index = (s4) val; + p = exceptions_new_arrayindexoutofboundsexception(index); + break; - act.sa_sigaction = signal_handler_sigusr1; - act.sa_flags = SA_SIGINFO; - sigaction(SIGUSR1, &act, NULL); + case EXCEPTION_HARDWARE_ARRAYSTORE: + p = exceptions_new_arraystoreexception(); + break; + + case EXCEPTION_HARDWARE_CLASSCAST: + p = exceptions_new_classcastexception(o); + break; + + case EXCEPTION_HARDWARE_EXCEPTION: + p = exceptions_fillinstacktrace(); + break; + + case EXCEPTION_HARDWARE_PATCHER: +#if defined(ENABLE_REPLACEMENT) + if (replace_me_wrapper(xpc, context)) { + p = NULL; + break; + } +#endif + p = patcher_handler(xpc); + break; + + case EXCEPTION_HARDWARE_COMPILER: + p = jit_compile_handle(m, sfi.pv, ra, (void *) val); + break; + + default: + /* Let's try to get a backtrace. */ + + codegen_get_pv_from_pc(xpc); + + /* If that does not work, print more debug info. */ + + log_println("signal_handle: unknown hardware exception type %d", type); + +#if SIZEOF_VOID_P == 8 + log_println("PC=0x%016lx", xpc); +#else + log_println("PC=0x%08x", xpc); +#endif + +#if defined(ENABLE_DISASSEMBLER) + log_println("machine instruction at PC:"); + disassinstr(xpc); #endif + + vm_abort("Exiting..."); + + /* keep compiler happy */ + + p = NULL; + } + + /* Remove stackframeinfo. */ + + stacktrace_stackframeinfo_remove(&sfi); + + /* unwrap and return the exception object */ + /* AFTER: removing stackframeinfo */ + + if (type == EXCEPTION_HARDWARE_COMPILER) + return p; + else + return LLNI_UNWRAP(p); } -/* signal_handler_sigquit ****************************************************** +/* signal_thread ************************************************************ - XXX + 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. *******************************************************************************/ -#if defined(USE_THREADS) && defined(NATIVE_THREADS) -void signal_handler_sigquit(int sig, siginfo_t *siginfo, void *_p) +static void signal_thread(void) { - /* do thread dump */ + threadobject *t; + sigset_t mask; + int sig; + + t = THREADOBJECT; + + if (sigemptyset(&mask) != 0) + vm_abort("signal_thread: sigemptyset failed: %s", strerror(errno)); + +#if !defined(WITH_CLASSPATH_SUN) + /* Let OpenJDK handle SIGINT itself. */ + + if (sigaddset(&mask, SIGINT) != 0) + vm_abort("signal_thread: sigaddset failed: %s", strerror(errno)); +#endif + +#if !defined(__FREEBSD__) + if (sigaddset(&mask, SIGQUIT) != 0) + vm_abort("signal_thread: sigaddset failed: %s", strerror(errno)); +#endif + + for (;;) { + /* just wait for a signal */ + +#if defined(ENABLE_THREADS) + threads_thread_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. */ - thread_dump(); +/* if (sigwait(&mask, &sig) != 0) */ +/* vm_abort("signal_thread: sigwait failed: %s", strerror(errno)); */ + (void) sigwait(&mask, &sig); + +#if defined(ENABLE_THREADS) + threads_thread_state_runnable(t); +#endif + + /* 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. + +*******************************************************************************/ + +void signal_thread_handler(int sig) +{ + switch (sig) { + case SIGINT: + /* exit the vm properly */ + + vm_exit(0); + break; + + case SIGQUIT: + /* print a thread dump */ +#if defined(ENABLE_THREADS) + threads_dump(); +#endif + +#if defined(ENABLE_STATISTICS) + if (opt_stat) + statistics_print_memory_usage(); #endif + break; + } +} -/* signal_handler_sigusr1 ****************************************************** +/* signal_start_thread ********************************************************* - XXX + Starts the signal handler thread. *******************************************************************************/ -#if defined(USE_THREADS) && defined(NATIVE_THREADS) -void signal_handler_sigusr1(int sig, siginfo_t *siginfo, void *_p) +bool signal_start_thread(void) { - /* call stacktrace function */ +#if defined(ENABLE_THREADS) + utf *name; + + name = utf_new_char("Signal Handler"); - stacktrace_dump_trace(); + if (!threads_thread_start_internal(name, signal_thread)) + return false; + + /* everything's ok */ + + return true; +#else +#warning FIX ME! +#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