# HG changeset patch
# User Gilles Duboscq <duboscq@ssw.jku.at>
# Date 1398780714 -7200
# Node ID 8638307944beff7a52a42836a342fbc314fd021b
# Parent  62f455eba8c516ee7859e6d7332b6370adc15be6
Add flag to always enable debug info sharing (true ifdef GRAAL)

diff -r 62f455eba8c5 -r 8638307944be src/share/vm/code/debugInfoRec.cpp
--- a/src/share/vm/code/debugInfoRec.cpp	Tue Apr 29 16:16:27 2014 +0200
+++ b/src/share/vm/code/debugInfoRec.cpp	Tue Apr 29 16:11:54 2014 +0200
@@ -235,16 +235,13 @@
 
 
 int DebugInformationRecorder::find_sharable_decode_offset(int stream_offset) {
-  // It's always a space win to share and Graal generates quite a bit
-  // of scopes data so always enable the sharing logic with Graal.
-  // Presumably this is disabled in regular HotSpot because it makes
-  // recording more expensive?
-#ifndef GRAAL
-  // Only pull this trick if non-safepoint recording
-  // is enabled, for now.
-  if (!recording_non_safepoints())
+  if (FLAG_IS_DEFAULT(ShareDebugInfo)) {
+    if (!ShareDebugInfo && !recording_non_safepoints()) {
+      return serialized_null;
+    }
+  } else if (!ShareDebugInfo) {
     return serialized_null;
-#endif
+  }
 
   NOT_PRODUCT(++dir_stats.chunks_queried);
   int stream_length = stream()->position() - stream_offset;
diff -r 62f455eba8c5 -r 8638307944be src/share/vm/runtime/globals.hpp
--- a/src/share/vm/runtime/globals.hpp	Tue Apr 29 16:16:27 2014 +0200
+++ b/src/share/vm/runtime/globals.hpp	Tue Apr 29 16:11:54 2014 +0200
@@ -980,6 +980,9 @@
   product(bool, PrintNMethodStatistics, false,                              \
           "Print a summary statistic for the generated nmethods")           \
                                                                             \
+  product(bool, ShareDebugInfo, IS_GRAAL_DEFINED,                           \
+          "Always tries to share similar debug info inside a nmethod")      \
+                                                                            \
   diagnostic(bool, PrintNMethods, false,                                    \
           "Print assembly code for nmethods when generated")                \
                                                                             \