28   struct __sigaction action;  in TEST()  local
29   EXPECT_THAT(__llvm_libc::sigaction(SIGKILL, nullptr, &action), Succeeds());  in TEST()
30   EXPECT_THAT(__llvm_libc::sigaction(SIGKILL, &action, nullptr), Fails(EINVAL));  in TEST()
40   struct __sigaction action;  in TEST()  local
41   EXPECT_THAT(__llvm_libc::sigaction(SIGUSR1, nullptr, &action), Succeeds());  in TEST()
43   action.sa_handler = +[](int signal) {  in TEST()
47   EXPECT_THAT(__llvm_libc::sigaction(SIGUSR1, &action, nullptr), Succeeds());  in TEST()
53   action.sa_handler = SIG_DFL;  in TEST()
54   EXPECT_THAT(__llvm_libc::sigaction(SIGUSR1, &action, nullptr), Succeeds());  in TEST()
60   struct __sigaction action;  in TEST()  local
61   EXPECT_THAT(__llvm_libc::sigaction(SIGUSR1, nullptr, &action), Succeeds());  in TEST()
62   action.sa_handler = SIG_IGN;  in TEST()
63   EXPECT_THAT(__llvm_libc::sigaction(SIGUSR1, &action, nullptr), Succeeds());  in TEST()