Deoptimization can occur at Dart calls (includes native calls to C) but not at runtime calls. This …

runtime/vm/native_entry.h

Index: runtime/vm/native_entry.h
===================================================================
--- runtime/vm/native_entry.h	(revision 11533)
+++ runtime/vm/native_entry.h	(working copy)
@@ -15,6 +15,7 @@
 
 namespace dart {
 
+DECLARE_FLAG(bool, deoptimize_alot);
 DECLARE_FLAG(bool, trace_natives);
 
 // Forward declarations.
@@ -33,6 +34,7 @@
 
 
 #define DEFINE_NATIVE_ENTRY(name, argument_count)                              \
+  extern void DeoptimizeAll();                                                 \

[siva, 2012/08/30 01:37:30]

why not include "code_generator.h" in this file instead of this extern void
DeoptimizeAll declaration.

[srdjan, 2012/08/30 17:16:16]

Done.

   static void DN_Helper##name(Isolate* isolate, NativeArguments* arguments);   \
   void NATIVE_ENTRY_FUNCTION(name)(Dart_NativeArguments args) {                \
     CHECK_STACK_ALIGNMENT;                                                     \
@@ -44,6 +46,7 @@
       Zone zone(arguments->isolate());                                         \
       HANDLESCOPE(arguments->isolate());                                       \
       DN_Helper##name(arguments->isolate(), arguments);                        \
+      if (FLAG_deoptimize_alot) DeoptimizeAll();                               \
     }                                                                          \
     VERIFY_ON_TRANSITION;                                                      \
   }                                                                            \