os::signal(int signal_number, void* handler)
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//Linux版(jdk7/hotspot/src/os/linux/vm/os_linux.cpp) void* os::signal(int signal_number, void* handler) { struct sigaction sigAct, oldSigAct; sigfillset(&(sigAct.sa_mask)); sigAct.sa_flags = SA_RESTART|SA_SIGINFO; sigAct.sa_handler = CAST_TO_FN_PTR(sa_handler_t, handler); if (sigaction(signal_number, &sigAct, &oldSigAct)) { // -1 means registration failed return (void *)-1; } return CAST_FROM_FN_PTR(void*, oldSigAct.sa_handler); }