Imported Upstream version 6.10.0.49

Former-commit-id: 1d6753294b2993e1fbf92de9366bb9544db4189b

external/llvm-project/compiler-rt/test/asan/TestCases/Darwin/reexec-insert-libraries-env.cc

@@ -0,0 +1,27 @@
+// Make sure ASan doesn't hang in an exec loop if DYLD_INSERT_LIBRARIES is set.
+// This is a regression test for
+// https://code.google.com/p/address-sanitizer/issues/detail?id=159
+
+// RUN: %clangxx_asan %s -o %t
+// RUN: %clangxx -DSHARED_LIB %s \
+// RUN:     -dynamiclib -o darwin-dummy-shared-lib-so.dylib
+
+// FIXME: the following command line may hang in the case of a regression.
+// RUN: %env DYLD_INSERT_LIBRARIES=darwin-dummy-shared-lib-so.dylib \
+// RUN:     %run %t 2>&1 | FileCheck %s || exit 1
+
+// UNSUPPORTED: ios
+
+#if !defined(SHARED_LIB)
+#include <stdio.h>
+#include <stdlib.h>
+
+int main() {
+  const char kEnvName[] = "DYLD_INSERT_LIBRARIES";
+  printf("%s=%s\n", kEnvName, getenv(kEnvName));
+  // CHECK: {{DYLD_INSERT_LIBRARIES=.*darwin-dummy-shared-lib-so.dylib.*}}
+  return 0;
+}
+#else  // SHARED_LIB
+void foo() {}
+#endif  // SHARED_LIB