Assign unique IDs to FunctionLiterals

src/objects.h

 // Copyright 2015 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_OBJECTS_H_
 #define V8_OBJECTS_H_
 
 #include <iosfwd>
 #include <memory>
 
@@ skipping 7455 matching lines @@
 
   // [expected_nof_properties]: Expected number of properties for the function.
   inline int expected_nof_properties() const;
   inline void set_expected_nof_properties(int value);
 
   // [feedback_metadata] - describes ast node feedback from full-codegen and
   // (increasingly) from crankshafted code where sufficient feedback isn't
   // available.
   DECL_ACCESSORS(feedback_metadata, TypeFeedbackMetadata)
 
+  // [function_literal_id] - uniquely identifies the FunctionLiteral this
+  // SharedFunctionInfo represents within its script, or -1 if this
+  // SharedFunctionInfo object doesn't correspond to a parsed FunctionLiteral.
+  inline int function_literal_id() const;
+  inline void set_function_literal_id(int value);
+
 #if TRACE_MAPS
   // [unique_id] - For --trace-maps purposes, an identifier that's persistent
   // even if the GC moves this SharedFunctionInfo.
   inline int unique_id() const;
   inline void set_unique_id(int value);
 #endif
 
   // [instance class name]: class name for instances.
   DECL_ACCESSORS(instance_class_name, Object)
 
@@ skipping 286 matching lines @@
   static const int kConstructStubOffset = kOuterScopeInfoOffset + kPointerSize;
   static const int kInstanceClassNameOffset =
       kConstructStubOffset + kPointerSize;
   static const int kFunctionDataOffset =
       kInstanceClassNameOffset + kPointerSize;
   static const int kScriptOffset = kFunctionDataOffset + kPointerSize;
   static const int kDebugInfoOffset = kScriptOffset + kPointerSize;
   static const int kFunctionIdentifierOffset = kDebugInfoOffset + kPointerSize;
   static const int kFeedbackMetadataOffset =
       kFunctionIdentifierOffset + kPointerSize;
+  static const int kFunctionLiteralIdOffset =
+      kFeedbackMetadataOffset + kPointerSize;
 #if TRACE_MAPS
-  static const int kUniqueIdOffset = kFeedbackMetadataOffset + kPointerSize;
+  static const int kUniqueIdOffset = kFunctionLiteralIdOffset + kPointerSize;
   static const int kLastPointerFieldOffset = kUniqueIdOffset;
 #else
   // Just to not break the postmortrem support with conditional offsets
-  static const int kUniqueIdOffset = kFeedbackMetadataOffset;
-  static const int kLastPointerFieldOffset = kFeedbackMetadataOffset;
+  static const int kUniqueIdOffset = kFunctionLiteralIdOffset;
+  static const int kLastPointerFieldOffset = kFunctionLiteralIdOffset;
 #endif
 
 #if V8_HOST_ARCH_32_BIT
   // Smi fields.
   static const int kLengthOffset = kLastPointerFieldOffset + kPointerSize;
   static const int kFormalParameterCountOffset = kLengthOffset + kPointerSize;
   static const int kExpectedNofPropertiesOffset =
       kFormalParameterCountOffset + kPointerSize;
   static const int kNumLiteralsOffset =
       kExpectedNofPropertiesOffset + kPointerSize;
@@ skipping 4063 matching lines @@
     }
     return value;
   }
 };
 
 
 }  // NOLINT, false-positive due to second-order macros.
 }  // NOLINT, false-positive due to second-order macros.
 
 #endif  // V8_OBJECTS_H_