Reenable function source fingerprint checks. Added checks to MethodRecognizer.

runtime/vm/object.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/object.h"
 
 #include "include/dart_api.h"
 #include "platform/assert.h"
 #include "vm/assembler.h"
 #include "vm/bigint_operations.h"
@@ skipping 4197 matching lines @@
     obj = tokens_iterator.CurrentToken();
     if (obj.IsSmi()) {
       val = Smi::Cast(obj).Value();
     } else {
       literal = tokens_iterator.MakeLiteralToken(obj);
       val = literal.Hash();
     }
     result = 31 * result + val;
     tokens_iterator.Advance();
   }
-  result = result & ((static_cast<intptr_t>(1) << 30) - 1);
+  result = result & ((static_cast<uint32_t>(1) << 31) - 1);
   ASSERT(result <= static_cast<uint32_t>(kMaxInt32));
   return result;
 }
 
 
+bool Function::CheckSourceFingerprint(intptr_t fp) const {
+  if (SourceFingerprint() != fp) {
+    OS::Print("FP mismatch while recogbnizing method %s:"
+      " expecting %"Pd" found %d\n",
+      ToFullyQualifiedCString(),
+      fp,
+      SourceFingerprint());
+    return false;
+  }
+  return true;
+}
+
+
 const char* Function::ToCString() const {
   const char* static_str = is_static() ? " static" : "";
   const char* abstract_str = is_abstract() ? " abstract" : "";
   const char* kind_str = NULL;
   const char* const_str = is_const() ? " const" : "";
   switch (kind()) {
     case RawFunction::kRegularFunction:
     case RawFunction::kClosureFunction:
     case RawFunction::kGetterFunction:
     case RawFunction::kSetterFunction:
@@ skipping 7958 matching lines @@
   }
   return result.raw();
 }
 
 
 const char* WeakProperty::ToCString() const {
   return "_WeakProperty";
 }
 
 }  // namespace dart