[libc++] Fix environment variable passing in libc++'s `SSHExecutor` `lit` utility

Summary:
Quote the value of environment variables when passing them to the SSH
client in SSHExecutor in libc++'s lit utilities. Without the quotes,
an environment variable like FOO="buzz bar" gets passed incorrectly
like this, ssh env FOO=buzz bar, which causes bar to be treated as a
command to run, not part of the environment variable value.

We ran into this when using SSHExecutor to do bringup of our CUDA
libcu++ port on an embedded aarch64 system.

Patch by Bryce Adelstein Lelbach.

Differential Revision: https://reviews.llvm.org/D65960

llvm-svn: 368317

1 files changed, 1 insertions, 1 deletions

diff --git a/libcxx/utils/libcxx/test/executor.py b/libcxx/utils/libcxx/test/executor.py
index 607c9384bc1..5bb5525d047 100644
--- a/libcxx/utils/libcxx/test/executor.py
+++ b/libcxx/utils/libcxx/test/executor.py
@@ -187,7 +187,7 @@ class SSHExecutor(RemoteExecutor):
         remote = self.user_prefix + self.host
         ssh_cmd = [self.ssh_command, '-oBatchMode=yes', remote]
         if env:
-            env_cmd = ['env'] + ['%s=%s' % (k, v) for k, v in env.items()]
+            env_cmd = ['env'] + ['%s="%s"' % (k, v) for k, v in env.items()]
         else:
             env_cmd = []
         remote_cmd = ' '.join(env_cmd + cmd)