Last snapshot bits to get working precompiled hello_world on x64.

runtime/vm/isolate.cc

Index: runtime/vm/isolate.cc
diff --git a/runtime/vm/isolate.cc b/runtime/vm/isolate.cc
index e05790b900e296289170ad7a2ead0cd5794b82da..784118e39089c6aa0ab33f4b950f420240ebbb5a 100644
--- a/runtime/vm/isolate.cc
+++ b/runtime/vm/isolate.cc
@@ -889,6 +889,20 @@ uword Isolate::GetCurrentStackPointer() {
 }
 
 
+void Isolate::SetupInstructionsSnapshotPage(
+    const uint8_t* instructions_snapshot_buffer) {
+  InstructionsSnapshot snapshot(instructions_snapshot_buffer);
+#if defined(DEBUG)
+  OS::Print("Precompiled instructions are at [%" Px ", %" Px ")\n",

[siva, 2015/09/16 16:45:41]

0x%" ..... 0x%" ....

[rmacnak, 2015/09/16 18:17:18]

Done.

+            reinterpret_cast<uword>(snapshot.instructions_start()),
+            reinterpret_cast<uword>(snapshot.instructions_start()) +
+            snapshot.instructions_size());
+#endif
+  heap_->SetupInstructionsSnapshotPage(snapshot.instructions_start(),
+                                       snapshot.instructions_size());
+}
+
+
 void Isolate::set_debugger_name(const char* name) {
   free(debugger_name_);
   debugger_name_ = strdup(name);