Reimplement dynamic frame alignment for frames that are compiled via OSR or have more than 2 double…

src/frames.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 188 matching lines @@
   bool is_java_script() const {
     Type type = this->type();
     return (type == JAVA_SCRIPT) || (type == OPTIMIZED);
   }
 
   // Accessors.
   Address sp() const { return state_.sp; }
   Address fp() const { return state_.fp; }
   Address caller_sp() const { return GetCallerStackPointer(); }
 
+  // If this frame is optimized and was dynamically aligned return its old
+  // unaligned frame pointer.  When the frame is deoptimized its FP will shift
+  // up one word and become unaligned.
+  Address UnpaddedFP() const;
+
   Address pc() const { return *pc_address(); }
   void set_pc(Address pc) { *pc_address() = pc; }
 
   virtual void SetCallerFp(Address caller_fp) = 0;
 
   // Manually changes value of fp in this object.
   void UpdateFp(Address fp) { state_.fp = fp; }
 
   Address* pc_address() const { return state_.pc_address; }
 
@@ skipping 667 matching lines @@
 };
 
 
 // Reads all frames on the current stack and copies them into the current
 // zone memory.
 Vector<StackFrame*> CreateStackMap(Zone* zone);
 
 } }  // namespace v8::internal
 
 #endif  // V8_FRAMES_H_