| 46 | } |
| 47 | |
| 48 | void installLoggerSignalHandler(void* logger) { |
| 49 | Logger* old = nullptr; |
| 50 | if (!debuggableLogger.compare_exchange_strong(old, (Logger*)logger)) { |
| 51 | throw TERN_EXCEPTION("Could not install logger signal handler, some other logger is already here."); |
| 52 | } |
| 53 | |
| 54 | struct sigaction act; |
| 55 | act.sa_handler = loggerSignalHandler; |
| 56 | if (sigemptyset(&act.sa_mask) != 0) { |
| 57 | SYSCALL_EXCEPTION("sigemptyset"); |
| 58 | } |
| 59 | act.sa_flags = 0; |
| 60 | |
| 61 | // USR1 is used by undertaker |
| 62 | if (sigaction(SIGUSR2, &act, NULL) < 0) { |
| 63 | throw SYSCALL_EXCEPTION("sigaction"); |
| 64 | } |
| 65 | } |
| 66 | |
| 67 | void tearDownLoggerSignalHandler(void* logger) { |
| 68 | Logger* old = (Logger*)logger; |