[interpreter] Print bytecode offsets when dumping bytecode.

src/runtime/runtime-interpreter.cc

 // 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.
 
 #include "src/runtime/runtime-utils.h"
 
 #include <iomanip>
 
 #include "src/arguments.h"
 #include "src/frames-inl.h"
@@ skipping 99 matching lines @@
   CONVERT_ARG_HANDLE_CHECKED(BytecodeArray, bytecode_array, 0);
   CONVERT_SMI_ARG_CHECKED(bytecode_offset, 1);
   CONVERT_ARG_HANDLE_CHECKED(Object, accumulator, 2);
   OFStream os(stdout);
 
   int offset = bytecode_offset - BytecodeArray::kHeaderSize + kHeapObjectTag;
   interpreter::BytecodeArrayIterator bytecode_iterator(bytecode_array);
   AdvanceToOffsetForTracing(bytecode_iterator, offset);
   if (offset == bytecode_iterator.current_offset()) {
     // Print bytecode.
-    const uint8_t* bytecode_address =
-        reinterpret_cast<const uint8_t*>(*bytecode_array) + bytecode_offset;
-    os << " -> " << static_cast<const void*>(bytecode_address)
-       << " (" << bytecode_offset << ") : ";
+    const uint8_t* base_address = bytecode_array->GetFirstBytecodeAddress();
+    const uint8_t* bytecode_address = base_address + offset;
+    os << " -> " << static_cast<const void*>(bytecode_address) << " @ "
+       << std::setw(4) << offset << " : ";
     interpreter::Bytecodes::Decode(os, bytecode_address,
                                    bytecode_array->parameter_count());
     os << std::endl;
     // Print all input registers and accumulator.
     PrintRegisters(os, true, bytecode_iterator, accumulator);
 
     os << std::flush;
   }
   return isolate->heap()->undefined_value();
 }
@@ skipping 33 matching lines @@
 RUNTIME_FUNCTION(Runtime_InterpreterSetPendingMessage) {
   SealHandleScope shs(isolate);
   DCHECK_EQ(1, args.length());
   CONVERT_ARG_HANDLE_CHECKED(Object, message, 0);
   isolate->thread_local_top()->pending_message_obj_ = *message;
   return isolate->heap()->undefined_value();
 }
 
 }  // namespace internal
 }  // namespace v8