[asan_symbolize] Provide better error message when extracting the UUID of a binary...

rdar://problem/49476995

llvm-svn: 367378

diff --git a/compiler-rt/lib/asan/scripts/asan_symbolize.py b/compiler-rt/lib/asan/scripts/asan_symbolize.py
index 28995bc..37defae 100755 (executable)
--- a/compiler-rt/lib/asan/scripts/asan_symbolize.py
+++ b/compiler-rt/lib/asan/scripts/asan_symbolize.py
@@ -756,7 +756,9 @@ def get_uuid_from_binary(path_to_binary, arch=None):
     uuid = split_uuid_line[1]
     break
   if uuid is None:
-    raise GetUUIDFromBinaryException('Failed to retrieve UUID')
+    logging.error('Failed to retrieve UUID from binary {}'.format(path_to_binary))
+    logging.error('otool output was:\n{}'.format(output_str))
+    raise GetUUIDFromBinaryException('Failed to retrieve UUID from binary "{}"'.format(path_to_binary))
   else:
     # Update cache
     _get_uuid_from_binary_cache[cache_key] = uuid