int sigaction(int sig, const struct sigaction *act, struct sigaction *oact) { int res; bool sigused; struct sigaction oldAct; check_status(pthread_once(&reentry_key_init_once, reentry_tls_init)); if (pthread_getspecific(reentry_flag_key) != NULL) { return call_os_sigaction(sig, act, oact); } signal_lock(); sigused = (MASK(sig) & jvmsigs) != 0; if (jvm_signal_installed && sigused) { /* jvm has installed its signal handler for this signal. */ /* Save the handler. Don't really install it. */ if (oact != NULL) { *oact = sact[sig]; } if (act != NULL) { sact[sig] = *act; } signal_unlock(); return 0; } else if (jvm_signal_installing) { /* jvm is installing its signal handlers. Install the new * handlers and save the old ones. */ res = call_os_sigaction(sig, act, &oldAct); sact[sig] = oldAct; if (oact != NULL) { *oact = oldAct; } /* Record the signals used by jvm */ jvmsigs |= MASK(sig); signal_unlock(); return res; } else { /* jvm has no relation with this signal (yet). Install the * the handler. */ res = call_os_sigaction(sig, act, oact); signal_unlock(); return res; } }
int sigaction(int sig, const struct sigaction *act, struct sigaction *oact) { int res; bool sigused; struct sigaction oldAct; signal_lock(); sigused = sigismember(&jvmsigs, sig); if (jvm_signal_installed && sigused) { /* jvm has installed its signal handler for this signal. */ /* Save the handler. Don't really install it. */ if (oact != NULL) { *oact = sact[sig]; } if (act != NULL) { sact[sig] = *act; } signal_unlock(); return 0; } else if (jvm_signal_installing) { /* jvm is installing its signal handlers. Install the new * handlers and save the old ones. */ res = call_os_sigaction(sig, act, &oldAct); sact[sig] = oldAct; if (oact != NULL) { *oact = oldAct; } /* Record the signals used by jvm. */ sigaddset(&jvmsigs, sig); signal_unlock(); return res; } else { /* jvm has no relation with this signal (yet). Install the * the handler. */ res = call_os_sigaction(sig, act, oact); signal_unlock(); return res; } }