I want to generate corefile when mongod received SIGSEGV to help debuging, but even I comment the signal binding code and recompile, mongod cannot dump corefile when SIGSEGV received, can you guys tell me why? Thanks a lot.

diff src/mongo/util/signal_handlers_synchronous.cpp

-        invariant(sigaction(SIGSEGV, &addrSignals, nullptr) == 0);
-        invariant(sigaction(SIGBUS, &addrSignals, nullptr) == 0);
+        //invariant(sigaction(SIGSEGV, &addrSignals, nullptr) == 0);
+        //invariant(sigaction(SIGBUS, &addrSignals, nullptr) == 0);

PS: Another program compiler by the same gcc on the same host can generate corefile when SIGSEGV received.

$ulimit -c
unlimited