[Truffle] Print some debug information if we can't find argv[0].

jruby · Dec 14, 2016 · 8893cde · 8893cde
1 parent faf00ed
commit 8893cde
Showing 1 changed file with 8 additions and 1 deletion.
diff --git a/truffle/src/main/ruby/core/process.rb b/truffle/src/main/ruby/core/process.rb
@@ -162,7 +162,14 @@ def self.setproctitle_linux_from_proc_maps(title)
       raise "Did not find the main class in args" unless main_index
       needle = command[0...main_index]
       i = haystack.index("\x00\x00#{needle}")
-      raise "argv[0] not found" unless i
+      unless i
+        puts
+        p needle
+        puts
+        p haystack
+        puts
+        raise "argv[0] not found"
+      end
       i += 2
 
       @_argv0_max_length = needle.bytesize