[compiler-rt][rtsan] socketpair interception. (#124107)

Author: devnexen

compiler-rt/lib/rtsan/rtsan_interceptors_posix.cpp

@@ -1088,6 +1088,11 @@ INTERCEPTOR(int, setsockopt, int socket, int level, int option,
 #define RTSAN_MAYBE_INTERCEPT_SETSOCKOPT
 #endif
 
+INTERCEPTOR(int, socketpair, int domain, int type, int protocol, int pair[2]) {
+  __rtsan_notify_intercepted_call("socketpair");
+  return REAL(socketpair)(domain, type, protocol, pair);
+}
+
 // I/O Multiplexing
 
 INTERCEPTOR(int, poll, struct pollfd *fds, nfds_t nfds, int timeout) {
@@ -1459,6 +1464,7 @@ void __rtsan::InitializeInterceptors() {
   RTSAN_MAYBE_INTERCEPT_GETPEERNAME;
   RTSAN_MAYBE_INTERCEPT_GETSOCKOPT;
   RTSAN_MAYBE_INTERCEPT_SETSOCKOPT;
+  INTERCEPT_FUNCTION(socketpair);
 
   RTSAN_MAYBE_INTERCEPT_SELECT;
   INTERCEPT_FUNCTION(pselect);

compiler-rt/lib/rtsan/tests/rtsan_test_interceptors_posix.cpp

@@ -1351,6 +1351,13 @@ TEST(TestRtsanInterceptors, SetsockoptOnASocketDiesWhenRealtime) {
 }
 #endif
 
+TEST(TestRtsanInterceptors, SocketpairDiesWhenRealtime) {
+  int pair[2]{};
+  auto Func = [&pair]() { socketpair(0, 0, 0, pair); };
+  ExpectRealtimeDeath(Func, "socketpair");
+  ExpectNonRealtimeSurvival(Func);
+}
+
 /*
     I/O Multiplexing
 */