Add a host parameter to ObjectVisitor methods.

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 10133 matching lines @@
 
 // Abstract base class for visiting, and optionally modifying, the
 // pointers contained in Objects. Used in GC and serialization/deserialization.
 // TODO(ulan): move to src/visitors.h
 class ObjectVisitor BASE_EMBEDDED {
  public:
   virtual ~ObjectVisitor() {}
 
   // Visits a contiguous arrays of pointers in the half-open range
   // [start, end). Any or all of the values may be modified on return.
-  virtual void VisitPointers(Object** start, Object** end) = 0;
+  virtual void VisitPointers(HeapObject* host, Object** start,
+                             Object** end) = 0;
 
   // Handy shorthand for visiting a single pointer.
-  virtual void VisitPointer(Object** p) { VisitPointers(p, p + 1); }
+  virtual void VisitPointer(HeapObject* host, Object** p) {
+    VisitPointers(host, p, p + 1);
+  }
 
   // Visit weak next_code_link in Code object.
-  virtual void VisitNextCodeLink(Object** p) { VisitPointers(p, p + 1); }
+  virtual void VisitNextCodeLink(Code* host, Object** p) {
+    VisitPointers(host, p, p + 1);
+  }
 
   // To allow lazy clearing of inline caches the visitor has
   // a rich interface for iterating over Code objects..
 
   // Visits a code target in the instruction stream.
-  virtual void VisitCodeTarget(RelocInfo* rinfo);
+  virtual void VisitCodeTarget(Code* host, RelocInfo* rinfo);
 
   // Visits a code entry in a JS function.
-  virtual void VisitCodeEntry(Address entry_address);
+  virtual void VisitCodeEntry(JSFunction* host, Address entry_address);
 
   // Visits a global property cell reference in the instruction stream.
-  virtual void VisitCell(RelocInfo* rinfo);
+  virtual void VisitCell(Code* host, RelocInfo* rinfo);
 
   // Visits a runtime entry in the instruction stream.
-  virtual void VisitRuntimeEntry(RelocInfo* rinfo) {}
+  virtual void VisitRuntimeEntry(Code* host, RelocInfo* rinfo) {}
 
   // Visits a debug call target in the instruction stream.
-  virtual void VisitDebugTarget(RelocInfo* rinfo);
+  virtual void VisitDebugTarget(Code* host, RelocInfo* rinfo);
 
   // Visits the byte sequence in a function's prologue that contains information
   // about the code's age.
-  virtual void VisitCodeAgeSequence(RelocInfo* rinfo);
+  virtual void VisitCodeAgeSequence(Code* host, RelocInfo* rinfo);
 
   // Visit pointer embedded into a code object.
-  virtual void VisitEmbeddedPointer(RelocInfo* rinfo);
+  virtual void VisitEmbeddedPointer(Code* host, RelocInfo* rinfo);
 
   // Visits an external reference embedded into a code object.
-  virtual void VisitExternalReference(RelocInfo* rinfo);
+  virtual void VisitExternalReference(Code* host, RelocInfo* rinfo) {}
 
   // Visits an external reference.
-  virtual void VisitExternalReference(Address* p) {}
+  virtual void VisitExternalReference(Foreign* host, Address* p) {}
 
   // Visits an (encoded) internal reference.
-  virtual void VisitInternalReference(RelocInfo* rinfo) {}
+  virtual void VisitInternalReference(Code* host, RelocInfo* rinfo) {}
 };
 
 
 // BooleanBit is a helper class for setting and getting a bit in an integer.
 class BooleanBit : public AllStatic {
  public:
   static inline bool get(int value, int bit_position) {
     return (value & (1 << bit_position)) != 0;
   }
 
   static inline int set(int value, int bit_position, bool v) {
     if (v) {
       value |= (1 << bit_position);
     } else {
       value &= ~(1 << bit_position);
     }
     return value;
   }
 };
 
 
 }  // NOLINT, false-positive due to second-order macros.
 }  // NOLINT, false-positive due to second-order macros.
 
 #include "src/objects/object-macros-undef.h"
 
 #endif  // V8_OBJECTS_H_