[libcxx] Codesign test executables if necessary

If LLVM_CODESIGNING_IDENTITY is set, test executables need to be
codesigned.

Differential Revision: https://reviews.llvm.org/D66496

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@371126 91177308-0d34-0410-b5e6-96231b3b80d8

utils/run.py

@@ -0,0 +1,38 @@
+#===----------------------------------------------------------------------===##
+#
+# Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+# See https://llvm.org/LICENSE.txt for license information.
+# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+#
+#===----------------------------------------------------------------------===##
+
+"""run.py is a utility for running a program.
+
+It can perform code signing, forward arguments to the program, and return the
+program's error code.
+"""
+
+import subprocess
+import sys
+
+
+def main():
+    codesign_ident = sys.argv[1]
+
+    # Ignore 'run.py' and the codesigning identity.
+    argv = sys.argv[2:]
+
+    exec_path = argv[0]
+
+    # Do any necessary codesigning.
+    if codesign_ident:
+        sign_cmd = ['xcrun', 'codesign', '-f', '-s', codesign_ident, exec_path]
+        cs_rc = subprocess.call(sign_cmd, env={})
+        if cs_rc != 0:
+            sys.stderr.write('Failed to codesign: ' + exec_path)
+            return cs_rc
+
+    return subprocess.call(argv)
+
+if __name__ == '__main__':
+    exit(main())