Orderfile: assert that outlined functions are not instrumented.

As outlined functions are not consistently named across builds,
having them appear in instrumentation would wreak havoc in the
orderfile.

Bug: 922460
Change-Id: I4c89374b541edb31e2dce7a486cbe242db75532d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1508462
Commit-Queue: Matthew Cary <mattcary@chromium.org>
Reviewed-by: Egor Pasko <pasko@chromium.org>
Cr-Commit-Position: refs/heads/master@{#639498}

diff --git a/tools/cygprofile/orderfile_generator_backend.py b/tools/cygprofile/orderfile_generator_backend.py
index cec73bd..3dc26cb 100755
--- a/tools/cygprofile/orderfile_generator_backend.py
+++ b/tools/cygprofile/orderfile_generator_backend.py

@@ -587,9 +587,13 @@
     profiles = process_profiles.ProfileManager(files)
     processor = process_profiles.SymbolOffsetProcessor(
         self._compiler.lib_chrome_so)
-    ordered_symbols= cluster.ClusterOffsets(profiles, processor)
+    ordered_symbols = cluster.ClusterOffsets(profiles, processor)
     if not ordered_symbols:
       raise Exception('Failed to get ordered symbols')
+    for sym in ordered_symbols:
+      assert not sym.startswith('OUTLINED_FUNCTION_'), (
+          'Outlined function found in instrumented function, very likely '
+          'something has gone very wrong!')
     self._output_data['offsets_kib'] = processor.SymbolsSize(
             ordered_symbols) / 1024
     with open(self._GetUnpatchedOrderfileFilename(), 'w') as orderfile: