diff options
Diffstat (limited to 'signal.c')
| -rw-r--r-- | signal.c | 32 |
1 files changed, 21 insertions, 11 deletions
@@ -918,6 +918,7 @@ NOINLINE(static void check_reserved_signal_(const char *name, size_t name_len)); #ifdef SIGBUS +static sighandler_t default_sigbus_handler; NORETURN(static ruby_sigaction_t sigbus); static RETSIGTYPE @@ -933,12 +934,13 @@ sigbus(int sig SIGINFO_ARG) #if defined __APPLE__ || defined __linux__ CHECK_STACK_OVERFLOW(); #endif - rb_bug_for_fatal_signal(SIGINFO_CTX, "Bus Error" MESSAGE_FAULT_ADDRESS); + rb_bug_for_fatal_signal(default_sigbus_handler, sig, SIGINFO_CTX, "Bus Error" MESSAGE_FAULT_ADDRESS); } #endif #ifdef SIGSEGV +static sighandler_t default_sigsegv_handler; NORETURN(static ruby_sigaction_t sigsegv); static RETSIGTYPE @@ -946,12 +948,13 @@ sigsegv(int sig SIGINFO_ARG) { check_reserved_signal("SEGV"); CHECK_STACK_OVERFLOW(); - rb_bug_for_fatal_signal(SIGINFO_CTX, "Segmentation fault" MESSAGE_FAULT_ADDRESS); + rb_bug_for_fatal_signal(default_sigsegv_handler, sig, SIGINFO_CTX, "Segmentation fault" MESSAGE_FAULT_ADDRESS); } #endif #ifdef SIGILL +static sighandler_t default_sigill_handler; NORETURN(static ruby_sigaction_t sigill); static RETSIGTYPE @@ -961,7 +964,7 @@ sigill(int sig SIGINFO_ARG) #if defined __APPLE__ CHECK_STACK_OVERFLOW(); #endif - rb_bug_for_fatal_signal(SIGINFO_CTX, "Illegal instruction" MESSAGE_FAULT_ADDRESS); + rb_bug_for_fatal_signal(default_sigill_handler, sig, SIGINFO_CTX, "Illegal instruction" MESSAGE_FAULT_ADDRESS); } #endif @@ -1432,21 +1435,28 @@ sig_list(VALUE _) perror(failed); \ } while (0) static int -install_sighandler(int signum, sighandler_t handler) +install_sighandler_core(int signum, sighandler_t handler, sighandler_t *old_handler) { sighandler_t old; old = ruby_signal(signum, handler); if (old == SIG_ERR) return -1; - /* signal handler should be inherited during exec. */ - if (old != SIG_DFL) { - ruby_signal(signum, old); + if (old_handler) { + *old_handler = (old == SIG_DFL || old == SIG_IGN) ? 0 : old; + } + else { + /* signal handler should be inherited during exec. */ + if (old != SIG_DFL) { + ruby_signal(signum, old); + } } return 0; } # define install_sighandler(signum, handler) \ - INSTALL_SIGHANDLER(install_sighandler(signum, handler), #signum, signum) + INSTALL_SIGHANDLER(install_sighandler_core(signum, handler, NULL), #signum, signum) +# define force_install_sighandler(signum, handler, old_handler) \ + INSTALL_SIGHANDLER(install_sighandler_core(signum, handler, old_handler), #signum, signum) #if RUBY_SIGCHLD static int @@ -1558,14 +1568,14 @@ Init_signal(void) if (!ruby_enable_coredump) { #ifdef SIGBUS - install_sighandler(SIGBUS, (sighandler_t)sigbus); + force_install_sighandler(SIGBUS, (sighandler_t)sigbus, &default_sigbus_handler); #endif #ifdef SIGILL - install_sighandler(SIGILL, (sighandler_t)sigill); + force_install_sighandler(SIGILL, (sighandler_t)sigill, &default_sigill_handler); #endif #ifdef SIGSEGV RB_ALTSTACK_INIT(GET_VM()->main_altstack); - install_sighandler(SIGSEGV, (sighandler_t)sigsegv); + force_install_sighandler(SIGSEGV, (sighandler_t)sigsegv, &default_sigsegv_handler); #endif } #ifdef SIGPIPE |