crosperf: generate perf report with correct debug files

This patch fixes the issue in chromium:946588.

This patch makes perf report no longer use hard code debug directories.
There are several different situations:

1) When running tests on a downloaded image, it will download debug.tgz
from gs, extract it to debug_files in /tmp. Options --symfs and
--vmlinux will depend on this directory, and throw a warning to user
that --kallsyms cannot be applied.

2) If running with downloaded image and debug.tgz could not work, then
we will try to use local build, but give user a warning that it may not
match real symbols well.

3) When running tests with local build, try to find debug info from
/build/$board directory.

Thus, this patch added a new field in label, called 'debug_path', if
this is manually set in experiment file, then crosperf will directly use
the location.

Downloading of debug.tgz will only happen when perf_args is set in
global settings.

TEST=Passed all unit tests, tested with eve and sand.
BUG=chromium:946588

Change-Id: I7f35d1216d912c8526d5501748f951face1273aa
Reviewed-on: https://chromium-review.googlesource.com/1561780
Commit-Ready: Zhizhou Yang <zhizhouy@google.com>
Tested-by: Zhizhou Yang <zhizhouy@google.com>
Reviewed-by: Manoj Gupta <manojgupta@chromium.org>

1 files changed, 15 insertions, 2 deletions

diff --git a/crosperf/experiment_file.py b/crosperf/experiment_file.py
index 12f9d5df..41a2b809 100644
--- a/crosperf/experiment_file.py
+++ b/crosperf/experiment_file.py
@@ -1,6 +1,8 @@
+# -*- coding: utf-8 -*-
 # Copyright (c) 2011 The Chromium OS Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
+
 """The experiment file module. It manages the input file of crosperf."""
 
 from __future__ import print_function
@@ -164,11 +166,22 @@ class ExperimentFile(object):
               autotest_path = ''
               if autotest_field.assigned:
                 autotest_path = autotest_field.GetString()
-              image_path, autotest_path = settings.GetXbuddyPath(
-                  value, autotest_path, board, chromeos_root, 'quiet')
+              debug_field = settings.fields['debug_path']
+              debug_path = ''
+              if debug_field.assigned:
+                debug_path = autotest_field.GetString()
+              perf_args_field = self.global_settings.fields['perf_args']
+              perf_args = ''
+              if perf_args_field.assigned:
+                perf_args = perf_args_field.GetString()
+              image_path, autotest_path, debug_path = settings.GetXbuddyPath(
+                  value, autotest_path, debug_path, board, chromeos_root,
+                  'quiet', perf_args)
               res += '\t#actual_image: %s\n' % image_path
               if not autotest_field.assigned:
                 res += '\t#actual_autotest_path: %s\n' % autotest_path
+              if not debug_field.assigned:
+                res += '\t#actual_debug_path: %s\n' % debug_path
 
         res += '}\n\n'