1 files changed, 42 insertions, 0 deletions
diff --git a/test/msan/Linux/poll.cc b/test/msan/Linux/poll.cc
new file mode 100644
index 000000000..7870d18e0
--- /dev/null
+++ b/test/msan/Linux/poll.cc
@@ -0,0 +1,42 @@
+// RUN: %clangxx_msan -O0 -std=c++11 -g %s -o %t
+// RUN: %run %t _ 2>&1 | FileCheck %s --check-prefix=CLEAN
+// RUN: not %run %t A 2>&1 | FileCheck %s --check-prefix=A
+// RUN: not %run %t B 2>&1 | FileCheck %s --check-prefix=B
+
+#include <assert.h>
+#include <poll.h>
+#include <signal.h>
+#include <stdio.h>
+
+#include <sanitizer/msan_interface.h>
+
+int main(int argc, char **argv) {
+  char T = argv[1][0];
+
+  struct timespec ts;
+  ts.tv_sec = 0;
+  ts.tv_nsec = 1000;
+  int res = ppoll(nullptr, 0, &ts, nullptr);
+  assert(res == 0);
+
+  if (T == 'A') {
+    __msan_poison(&ts.tv_sec, sizeof(ts.tv_sec));
+    ppoll(nullptr, 0, &ts, nullptr);
+    // A: use-of-uninitialized-value
+  }
+
+  // A-NOT: ==1
+  // B: ==1
+  fprintf(stderr, "==1\n");
+
+  sigset_t sig;
+  if (T != 'B')
+    sigemptyset(&sig);
+  ppoll(nullptr, 0, &ts, &sig);
+  // B: use-of-uninitialized-value
+
+  // B-NOT: ==2
+  // CLEAN: ==2
+  fprintf(stderr, "==2\n");
+  return 0;
+}