VM support for running Kernel binaries.

runtime/vm/raw_object.h

Index: runtime/vm/raw_object.h
diff --git a/runtime/vm/raw_object.h b/runtime/vm/raw_object.h
index 984561693215044299677b81d4ae1d33908bba2f..f8c6ab02bec1abb2beaefb0540e3e7b4bc6f41b6 100644
--- a/runtime/vm/raw_object.h
+++ b/runtime/vm/raw_object.h
@@ -216,6 +216,10 @@ CLASS_LIST_TYPED_DATA(V)
 #undef V
 };
 
+enum {
+  kNoDilNode = 0

[rmacnak, 2016/10/13 00:56:39]

NULL

[Vyacheslav Egorov (Google), 2016/10/13 14:37:58]

Good point. Done.

+};
+
 #define SNAPSHOT_WRITER_SUPPORT()                                              \
   void WriteTo(                                                                \
       SnapshotWriter* writer, intptr_t object_id,                              \
@@ -869,6 +873,7 @@ class RawFunction : public RawObject {
   uint32_t kind_tag_;  // See Function::KindTagBits.
   int16_t num_fixed_parameters_;
   int16_t num_optional_parameters_;  // > 0: positional; < 0: named.
+  NOT_IN_PRECOMPILED(intptr_t dil_function_);

[rmacnak, 2016/10/13 00:56:39]

void* ?

I think it would make more sense to have a alternate version of Script that
pointed to some DIL instead of a TokenStream, rather than make any heap objects
bigger.

[Kevin Millikin (Google), 2016/10/13 04:38:35]

That's a good idea.  We do  have that. jenj@ is currently changing our treatment
of scripts as part of adding source positions for stack traces, debugging, and
profiling and a new script kind is part of those changes.

We have postponed shrinking instances by reusing fields, but now is probably a
good time to do that.

[Vyacheslav Egorov (Google), 2016/10/13 14:37:58]

I made it void*.

We can try to fold it into Script later.

As said multiple times before - increase in heap consumption is negligible and
it will go away later. 

   NOT_IN_PRECOMPILED(uint16_t optimized_instruction_count_);
   NOT_IN_PRECOMPILED(uint16_t optimized_call_site_count_);
   NOT_IN_PRECOMPILED(int8_t deoptimization_counter_);
@@ -964,6 +969,7 @@ class RawField : public RawObject {
   int8_t guarded_list_length_in_object_offset_;
 
   uint8_t kind_bits_;  // static, final, const, has initializer....
+  intptr_t dil_field_;

[rmacnak, 2016/10/13 00:56:39]

void* ?

[Vyacheslav Egorov (Google), 2016/10/13 14:37:58]

Done. Also made it NOT_IN_PRECOMPILED.

 
   friend class CidRewriteVisitor;
 };