From a6ff97fbf7ef63f7f52e803c3a667daa5930cd5d Mon Sep 17 00:00:00 2001
From: Don Jayamanne <don.jayamanne@yahoo.com>
Date: Fri, 13 Apr 2018 15:11:03 -0700
Subject: [PATCH] Check if local and remote roots are same (#345)

---
 ptvsd/wrapper.py | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/ptvsd/wrapper.py b/ptvsd/wrapper.py
index 51f115b9..d22f66da 100644
--- a/ptvsd/wrapper.py
+++ b/ptvsd/wrapper.py
@@ -1078,7 +1078,10 @@ class VSCodeMessageProcessor(ipcjson.SocketIO, ipcjson.IpcChannel):
         try:
             return self.source_map.to_vscode(filename, autogen=False)
         except KeyError:
-            pass
+            # If attaching to a local process (then remote and local are same)
+            for local_prefix, remote_prefix in pydevd_file_utils.PATHS_FROM_ECLIPSE_TO_PYTHON: # noqa
+                if local_prefix == remote_prefix and filename.startswith(local_prefix): # noqa
+                    return 0
 
         server_filename = pydevd_file_utils.norm_file_to_server(filename)