Imported Upstream version 6.10.0.49

Former-commit-id: 1d6753294b2993e1fbf92de9366bb9544db4189b

external/llvm-project/compiler-rt/test/msan/Linux/forkpty.cc

@@ -0,0 +1,25 @@
+// RUN: %clangxx_msan -O0 -g %s -lutil -o %t && %run %t
+
+#include <assert.h>
+#include <pty.h>
+#include <unistd.h>
+#include <cstring>
+
+#include <sanitizer/msan_interface.h>
+
+int
+main (int argc, char** argv)
+{
+  int master, slave;
+  openpty(&master, &slave, NULL, NULL, NULL);
+  assert(__msan_test_shadow(&master, sizeof(master)) == -1);
+  assert(__msan_test_shadow(&slave, sizeof(slave)) == -1);
+
+  char ttyname[255];
+  ttyname_r(master, ttyname, sizeof(ttyname));
+  assert(__msan_test_shadow(ttyname, strlen(ttyname) + 1) == -1);
+
+  int master2;
+  forkpty(&master2, NULL, NULL, NULL);
+  assert(__msan_test_shadow(&master2, sizeof(master2)) == -1);
+}