Significantly improve performance of code coverage tool by precomputing a map token_pos->line numbe…

runtime/vm/object.h

 // 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.
 
 #ifndef VM_OBJECT_H_
 #define VM_OBJECT_H_
 
 #include "include/dart_api.h"
 #include "platform/assert.h"
 #include "platform/utils.h"
@@ skipping 2454 matching lines @@
 };
 
 
 class Script : public Object {
  public:
   RawString* url() const { return raw_ptr()->url_; }
   bool HasSource() const;
   RawString* Source() const;
   RawString* GenerateSource() const;  // Generates source code from Tokenstream.
   RawGrowableObjectArray* GenerateLineNumberArray() const;
+  void ComputeTokenPosToLineNumberArray() const;
   RawScript::Kind kind() const {
     return static_cast<RawScript::Kind>(raw_ptr()->kind_);
   }
   const char* GetKindAsCString() const;
   intptr_t line_offset() const { return raw_ptr()->line_offset_; }
   intptr_t col_offset() const { return raw_ptr()->col_offset_; }
 
   RawTokenStream* tokens() const { return raw_ptr()->tokens_; }
 
   void Tokenize(const String& private_key) const;
@@ skipping 25 matching lines @@
 
   static RawScript* New(const String& url,
                         const String& source,
                         RawScript::Kind kind);
 
  private:
   void set_url(const String& value) const;
   void set_source(const String& value) const;
   void set_kind(RawScript::Kind value) const;
   void set_tokens(const TokenStream& value) const;
+  void set_token_pos_to_line_nr(const TypedData& value) const;
+  RawTypedData* token_pos_to_line_nr() const;
 
   static RawScript* New();
 
   FINAL_HEAP_OBJECT_IMPLEMENTATION(Script, Object);
   friend class Class;
 };
 
 
 class DictionaryIterator : public ValueObject {
  public:
@@ skipping 4578 matching lines @@
 
 
 RawObject* MegamorphicCache::GetTargetFunction(const Array& array,
                                                intptr_t index) {
   return array.At((index * kEntryLength) + kTargetFunctionIndex);
 }
 
 }  // namespace dart
 
 #endif  // VM_OBJECT_H_