Update Android's test configuration for new APIs.

The upstream test runner has changed enough that the way Android was
shimmed into it was no longer compatible. This adapts our test runner
to the new APIs for cross-compiling and remote execution.

There's probably a fair amount of dead code in the Android test
runners now (or at least some code that should be made dead). I'll
clean it up in a later patch, but want to get us up and running for
now.

The NDK test runner will need to be updated as well. There aren't any
continuous runs for that, so that will be fixed in a follow up as
well.

Change-Id: I1756f538aa6c7136ebd26d1e81c8299b87f0c6b2

test/libcxx/android/executors.py

@@ -0,0 +1,55 @@
+import time
+
+import libcxx.test.executor
+
+from libcxx.android import adb
+from lit.util import executeCommand  # pylint: disable=import-error
+
+
+class AdbExecutor(libcxx.test.executor.RemoteExecutor):
+    def __init__(self, serial=None):
+        # TODO(danalbert): Should factor out the shared pieces of SSHExecutor
+        # so we don't have this ugly parent constructor...
+        super(AdbExecutor, self).__init__()
+        self.serial = serial
+        self.local_run = executeCommand
+
+    def _remote_temp(self, is_dir):
+        dir_arg = '-d' if is_dir else ''
+        cmd = 'mktemp -q {} /data/local/tmp/libcxx.XXXXXXXXXX'.format(dir_arg)
+        temp_path, err, exitCode = self._execute_command_remote([cmd])
+        temp_path = temp_path.strip()
+        if exitCode != 0:
+            raise RuntimeError(err)
+        return temp_path
+
+    def _copy_in_file(self, src, dst):  # pylint: disable=no-self-use
+        adb.push(src, dst)
+
+    def _execute_command_remote(self, cmd, remote_work_dir='.', env=None):
+        adb_cmd = ['adb', 'shell']
+        if self.serial:
+            adb_cmd.extend(['-s', self.serial])
+        if env:
+            env_cmd = ['env'] + ['%s=%s' % (k, v) for k, v in env.items()]
+        else:
+            env_cmd = []
+        remote_cmd = ' '.join(env_cmd + cmd + ['; echo $?'])
+        if remote_work_dir != '.':
+            remote_cmd = 'cd {} && {}'.format(remote_work_dir, remote_cmd)
+        adb_cmd.append(remote_cmd)
+
+        # Tests will commonly fail with ETXTBSY. Possibly related to this bug:
+        # https://code.google.com/p/android/issues/detail?id=65857. Work around
+        # it by just waiting a second and then retrying.
+        for _ in range(10):
+            out, err, exit_code = self.local_run(adb_cmd)
+            if 'Text file busy' in out:
+                time.sleep(1)
+            else:
+                out = out.strip().split('\r\n')
+                status_line = out[-1:][0]
+                out = '\n'.join(out[:-1])
+                exit_code = int(status_line)
+                break
+        return out, err, exit_code