[interpreter] Add a safety-net for interpreter entry.

src/arm/builtins-arm.cc

Index: src/arm/builtins-arm.cc
diff --git a/src/arm/builtins-arm.cc b/src/arm/builtins-arm.cc
index bd7d067c28b64f5fe10bd1a5d2e3323a2a88d077..1eda1ff0275cf5e33c672c2a4bf02d2c49a7bcdf 100644
--- a/src/arm/builtins-arm.cc
+++ b/src/arm/builtins-arm.cc
@@ -874,10 +874,8 @@ void Builtins::Generate_JSConstructEntryTrampoline(MacroAssembler* masm) {
 //   o sp: stack pointer
 //   o lr: return address
 //
-// The function builds a JS frame.  Please see JavaScriptFrameConstants in
-// frames-arm.h for its layout.
-// TODO(rmcilroy): We will need to include the current bytecode pointer in the
-// frame.
+// The function builds an interpreter frame.  See InterpreterFrameConstants in
+// frames.h for its layout.
 void Builtins::Generate_InterpreterEntryTrampoline(MacroAssembler* masm) {
   // Open a frame scope to indicate that there is a frame on the stack.  The
   // MANUAL indicates that the scope shouldn't actually generate code to set up
@@ -975,6 +973,9 @@ void Builtins::Generate_InterpreterEntryTrampoline(MacroAssembler* masm) {
   // and header removal.
   __ add(ip, ip, Operand(Code::kHeaderSize - kHeapObjectTag));
   __ Call(ip);
+
+  // Even though the first bytecode handler was called, we will never return.
+  __ Abort(kUnexpectedReturnFromBytecodeHandler);
 }