--- a/GDBFrame.st	Fri Mar 09 12:38:44 2018 +0000
+++ b/GDBFrame.st	Tue Mar 27 08:50:56 2018 +0100
@@ -74,20 +74,58 @@
 !
 
 file
-    "Return filename containing frame's function source."
-    ^ fullname notNil ifTrue:[ fullname ] ifFalse:[ file ]
+    "Return filename (path) containing frame's function source."
+
+    | f |
+
+    "/ GDB/MI provides two paths, `file` and `fullname`. 
+    "/ 
+    "/ However, sometimes GDB gets confused and does not return
+    "/ anything directly useful, especially when debug info contains
+    "/ relative paths with multiple segments. 
+    "/ 
+    "/ As a courtesy to the user, in that case try to resolve full
+    "/ path here too. Hence the code below.
+    "/
+    "/ To avoid re-resolving of file each time this method is called,
+    "/ cache resolved Filename in `fullname` instvar. 
+
+    fullname isFilename ifTrue:[ 
+        "/ Already resolved by the code below
+        ^ fullname pathName
+    ].
 
-    "Modified: / 11-06-2017 / 20:59:34 / Jan Vrany <jan.vrany@fit.cvut.cz>"
+    f := fullname ? file.
+    f isNil ifTrue:[ ^ nil ].
+    f := f copyReplaceAll: $/ with: Filename separator.
+    f := f asFilename.
+
+    "/ check, if GDB returned correctly resolved filename...
+    f exists ifTrue:[
+        fullname := f.
+        ^ fullname pathName
+    ].
+
+    "/ ...if not, try to look it up in source directories...
+    self debugger directories do:[:d | 
+        f := d asFilename / (fullname ? file).
+        f exists ifTrue:[ 
+            fullname := f.
+            ^ fullname pathName.
+        ].
+    ].
+
+    "/ ...if not found there...
+    ^ nil
+
+    "Modified: / 12-03-2018 / 10:32:26 / Jan Vrany <jan.vrany@fit.cvut.cz>"
+    "Modified: / 22-03-2018 / 16:52:52 / jv"
 !
 
 from
     ^ from
 !
 
-fullname
-    ^ fullname
-!
-
 func
     ^ func
 !