1 files changed, 24 insertions, 0 deletions
diff --git a/lldb/unittests/Host/MainLoopTest.cpp b/lldb/unittests/Host/MainLoopTest.cpp
index b6aff2fb939..af225de4ab2 100644
--- a/lldb/unittests/Host/MainLoopTest.cpp
+++ b/lldb/unittests/Host/MainLoopTest.cpp
@@ -141,4 +141,28 @@ TEST_F(MainLoopTest, Signal) {
   ASSERT_TRUE(loop.Run().Success());
   ASSERT_EQ(1u, callback_count);
 }
+
+// Test that a signal which is not monitored by the MainLoop does not
+// cause a premature exit.
+TEST_F(MainLoopTest, UnmonitoredSignal) {
+  MainLoop loop;
+  Status error;
+  struct sigaction sa;
+  sa.sa_sigaction = [](int, siginfo_t *, void *) { };
+  sa.sa_flags = SA_SIGINFO; // important: no SA_RESTART
+  sigemptyset(&sa.sa_mask);
+  ASSERT_EQ(0, sigaction(SIGUSR2, &sa, nullptr));
+
+  auto handle = loop.RegisterSignal(SIGUSR1, make_callback(), error);
+  ASSERT_TRUE(error.Success());
+  std::thread killer([]() {
+    sleep(1);
+    kill(getpid(), SIGUSR2);
+    sleep(1);
+    kill(getpid(), SIGUSR1);
+  });
+  ASSERT_TRUE(loop.Run().Success());
+  killer.join();
+  ASSERT_EQ(1u, callback_count);
+}
 #endif