[interpreter, debugger] support debug breaks via bytecode array copy

test/unittests/interpreter/bytecodes-unittest.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 <vector>
 
 #include "src/v8.h"
 
 #include "src/interpreter/bytecodes.h"
 #include "test/unittests/test-utils.h"
@@ skipping 137 matching lines @@
   REGISTER_OUTPUT_OPERAND_TYPE_LIST(IS_REGISTER_OUTPUT_OPERAND_TYPE)
 #undef IS_REGISTER_OUTPUT_OPERAND_TYPE
 
 #define IS_NOT_REGISTER_OUTPUT_OPERAND_TYPE(Name, _) \
   CHECK(!Bytecodes::IsRegisterOutputOperandType(OperandType::k##Name));
   NON_REGISTER_OPERAND_TYPE_LIST(IS_NOT_REGISTER_OUTPUT_OPERAND_TYPE)
   REGISTER_INPUT_OPERAND_TYPE_LIST(IS_NOT_REGISTER_OUTPUT_OPERAND_TYPE)
 #undef IS_NOT_REGISTER_INPUT_OPERAND_TYPE
 }
 
+TEST(Bytecodes, DebugBreak) {
+  for (uint32_t i = 0; i < Bytecodes::ToByte(Bytecode::kLast); i++) {
+    Bytecode bytecode = Bytecodes::FromByte(i);
+    Bytecode debugbreak = Bytecodes::GetDebugBreak(bytecode);
+    if (!Bytecodes::IsDebugBreak(debugbreak)) {
+      PrintF("Bytecode %s has no matching debug break with length %d\n",
+             Bytecodes::ToString(bytecode), Bytecodes::Size(bytecode));
+      CHECK(false);
+    }
+  }
+}
+
 }  // namespace interpreter
 }  // namespace internal
 }  // namespace v8