[debugger] flood function for stepping before calling it.

src/arm64/macro-assembler-arm64.h

 // Copyright 2013 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_ARM64_MACRO_ASSEMBLER_ARM64_H_
 #define V8_ARM64_MACRO_ASSEMBLER_ARM64_H_
 
 #include <vector>
 
 #include "src/arm64/assembler-arm64.h"
@@ skipping 1156 matching lines @@
   // 'function' must be x1.
   // 'actual' must use an immediate or x0.
   // 'expected' must use an immediate or x2.
   // 'call_kind' must be x5.
   void InvokePrologue(const ParameterCount& expected,
                       const ParameterCount& actual,
                       Label* done,
                       InvokeFlag flag,
                       bool* definitely_mismatches,
                       const CallWrapper& call_wrapper);
-  void InvokeCode(Register code,
-                  Register new_target,
-                  const ParameterCount& expected,
-                  const ParameterCount& actual,
-                  InvokeFlag flag,
-                  const CallWrapper& call_wrapper);
+  void FloodFunctionIfStepping(Register fun, Register new_target,
+                               const ParameterCount& expected,
+                               const ParameterCount& actual);
+  void InvokeFunctionCode(Register function, Register new_target,
+                          const ParameterCount& expected,
+                          const ParameterCount& actual, InvokeFlag flag,
+                          const CallWrapper& call_wrapper);
   // Invoke the JavaScript function in the given register.
   // Changes the current context to the context in the function before invoking.
   void InvokeFunction(Register function,
                       Register new_target,
                       const ParameterCount& actual,
                       InvokeFlag flag,
                       const CallWrapper& call_wrapper);
   void InvokeFunction(Register function,
                       const ParameterCount& expected,
                       const ParameterCount& actual,
@@ skipping 1070 matching lines @@
 #error "Unsupported option"
 #define CODE_COVERAGE_STRINGIFY(x) #x
 #define CODE_COVERAGE_TOSTRING(x) CODE_COVERAGE_STRINGIFY(x)
 #define __FILE_LINE__ __FILE__ ":" CODE_COVERAGE_TOSTRING(__LINE__)
 #define ACCESS_MASM(masm) masm->stop(__FILE_LINE__); masm->
 #else
 #define ACCESS_MASM(masm) masm->
 #endif
 
 #endif  // V8_ARM64_MACRO_ASSEMBLER_ARM64_H_