debug_info_test: Run tests based on debug info

debug_info_test calls tests on the given ELF files. When a directory is
supplied, all ELFs will be searched and tested recursively.

BUG=chromium:817648
TEST=debug_info_test /build/kip/usr/lib/debug

Change-Id: Ibcb1ac2de19df9227eb6e242d611ec841d4b589f
Reviewed-on: https://chromium-review.googlesource.com/942465
Commit-Ready: Ting-Yuan Huang <laszio@chromium.org>
Tested-by: Ting-Yuan Huang <laszio@chromium.org>
Reviewed-by: Ting-Yuan Huang <laszio@chromium.org>
Reviewed-by: Yunlian Jiang <yunlian@chromium.org>

1 files changed, 53 insertions, 0 deletions

diff --git a/debug_info_test/debug_info_test.py b/debug_info_test/debug_info_test.py
new file mode 100755
index 00000000..cf3148db
--- /dev/null
+++ b/debug_info_test/debug_info_test.py
@@ -0,0 +1,53 @@
+#!/usr/bin/python
+
+# Copyright 2018 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.
+
+import os
+import subprocess
+import sys
+
+import check_cus
+
+elf_checks = [check_cus.check_compile_units]
+
+def scanelf(root):
+    """find ELFs in root
+
+    Args:
+        root: root dir to start with the search.
+    Returns:
+        Filenames of ELFs in root.
+    """
+    p = subprocess.Popen(['scanelf', '-y', '-B', '-F', '%F', '-R', root],
+                         stdout=subprocess.PIPE)
+    return [l.strip() for l in p.stdout]
+
+def Main(argv):
+    if len(argv) < 2:
+        print('usage: %s [file|dir]')
+        return 1
+
+    files = []
+    cand = argv[1]
+    if os.path.isfile(cand):
+        files = [cand]
+    elif os.path.isdir(cand):
+        files = scanelf(cand)
+    else:
+        print('usage: %s [file|dir]')
+        return 1
+
+    failed = False
+    for f in files:
+        for c in elf_checks:
+            if not c(f):
+                failed = True
+
+    if failed:
+        return 1
+    return 0
+
+if __name__ == '__main__':
+    sys.exit(Main(sys.argv))