[debugger] flood function for stepping before calling it.

src/ic/x64/handler-compiler-x64.cc

 // Copyright 2014 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.
 
 #if V8_TARGET_ARCH_X64
 
 #include "src/ic/call-optimization.h"
 #include "src/ic/handler-compiler.h"
 #include "src/ic/ic.h"
 #include "src/isolate-inl.h"
@@ skipping 231 matching lines @@
         __ movp(scratch,
                 FieldOperand(receiver, JSGlobalObject::kGlobalProxyOffset));
         receiver = scratch;
       }
       __ Push(receiver);
       __ Push(value());
       ParameterCount actual(1);
       ParameterCount expected(expected_arguments);
       __ LoadAccessor(rdi, holder, accessor_index, ACCESSOR_SETTER);
       __ InvokeFunction(rdi, no_reg, expected, actual, CALL_FUNCTION,
-                        NullCallWrapper());
+                        CheckDebugStepCallWrapper());
     } else {
       // If we generate a global code snippet for deoptimization only, remember
       // the place to continue after deoptimization.
       masm->isolate()->heap()->SetSetterStubDeoptPCOffset(masm->pc_offset());
     }
 
     // We have to return the passed value, not the return value of the setter.
     __ Pop(rax);
 
     // Restore context register.
@@ skipping 22 matching lines @@
         // Swap in the global receiver.
         __ movp(scratch,
                 FieldOperand(receiver, JSGlobalObject::kGlobalProxyOffset));
         receiver = scratch;
       }
       __ Push(receiver);
       ParameterCount actual(0);
       ParameterCount expected(expected_arguments);
       __ LoadAccessor(rdi, holder, accessor_index, ACCESSOR_GETTER);
       __ InvokeFunction(rdi, no_reg, expected, actual, CALL_FUNCTION,
-                        NullCallWrapper());
+                        CheckDebugStepCallWrapper());
     } else {
       // If we generate a global code snippet for deoptimization only, remember
       // the place to continue after deoptimization.
       masm->isolate()->heap()->SetGetterStubDeoptPCOffset(masm->pc_offset());
     }
 
     // Restore context register.
     __ movp(rsi, Operand(rbp, StandardFrameConstants::kContextOffset));
   }
   __ ret(0);
@@ skipping 501 matching lines @@
   // Return the generated code.
   return GetCode(kind(), Code::NORMAL, name);
 }
 
 
 #undef __
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_X64