Track references to allocation stubs via static_calls_table, instead of keeping two referencers ali…

runtime/vm/compiler.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/compiler.h"
 
 #include "vm/assembler.h"
 
 #include "vm/ast_printer.h"
 #include "vm/block_scheduler.h"
@@ skipping 779 matching lines @@
     OS::Print("Static call target functions {\n");
     const Array& table = Array::Handle(code.static_calls_target_table());
     Smi& offset = Smi::Handle();
     Function& function = Function::Handle();
     Code& code = Code::Handle();
     for (intptr_t i = 0; i < table.Length();
         i += Code::kSCallTableEntryLength) {
       offset ^= table.At(i + Code::kSCallTableOffsetEntry);
       function ^= table.At(i + Code::kSCallTableFunctionEntry);
       code ^= table.At(i + Code::kSCallTableCodeEntry);
-      OS::Print("  0x%" Px ": %s, %p\n",
-          start + offset.Value(),
-          function.ToFullyQualifiedCString(),
-          code.raw());
+      if (function.IsNull()) {
+        Class& cls = Class::Handle();
+        cls ^= code.owner();
+        OS::Print("  0x%" Px ": allocation stub for %s, %p\n",
+            start + offset.Value(),
+            cls.ToCString(),
+            code.raw());
+      } else {
+        OS::Print("  0x%" Px ": %s, %p\n",
+            start + offset.Value(),
+            function.ToFullyQualifiedCString(),
+            code.raw());
+      }
     }
     OS::Print("}\n");
   }
 }
 
 
 static RawError* CompileFunctionHelper(const Function& function,
                                        bool optimized,
                                        intptr_t osr_id) {
   Isolate* isolate = Isolate::Current();
@@ skipping 239 matching lines @@
     const Object& result =
       PassiveObject::Handle(isolate->object_store()->sticky_error());
     isolate->object_store()->clear_sticky_error();
     return result.raw();
   }
   UNREACHABLE();
   return Object::null();
 }
 
 }  // namespace dart