[debugger] break at each initialization in a multiple var declaration.

test/cctest/test-debug.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 2729 matching lines @@
   v8::Local<v8::Value> args[kArgc] = {a};
   foo->Call(context, env->Global(), kArgc, args).ToLocalChecked();
 
   // Set up break point and step through the function.
   SetBreakPoint(foo, 3);
   step_action = StepNext;
   break_point_hit_count = 0;
   foo->Call(context, env->Global(), kArgc, args).ToLocalChecked();
 
   // With stepping all break locations are hit.
-  CHECK_EQ(44, break_point_hit_count);
+  CHECK_EQ(45, break_point_hit_count);
 
   v8::Debug::SetDebugEventListener(env->GetIsolate(), nullptr);
   CheckDebuggerUnloaded(env->GetIsolate());
 }
 
 
 // Test of the stepping mechanism for keyed store in a loop.
 TEST(DebugStepKeyedStoreLoop) {
   DebugLocalContext env;
   v8::HandleScope scope(env->GetIsolate());
@@ skipping 29 matching lines @@
   v8::Local<v8::Value> args[kArgc] = {a};
   foo->Call(context, env->Global(), kArgc, args).ToLocalChecked();
 
   // Set up break point and step through the function.
   SetBreakPoint(foo, 3);
   step_action = StepNext;
   break_point_hit_count = 0;
   foo->Call(context, env->Global(), kArgc, args).ToLocalChecked();
 
   // With stepping all break locations are hit.
-  CHECK_EQ(44, break_point_hit_count);
+  CHECK_EQ(45, break_point_hit_count);
 
   v8::Debug::SetDebugEventListener(env->GetIsolate(), nullptr);
   CheckDebuggerUnloaded(env->GetIsolate());
 }
 
 
 // Test of the stepping mechanism for named load in a loop.
 TEST(DebugStepNamedLoadLoop) {
   DebugLocalContext env;
   v8::HandleScope scope(env->GetIsolate());
@@ skipping 24 matching lines @@
   // Call function without any break points to ensure inlining is in place.
   foo->Call(context, env->Global(), 0, NULL).ToLocalChecked();
 
   // Set up break point and step through the function.
   SetBreakPoint(foo, 4);
   step_action = StepNext;
   break_point_hit_count = 0;
   foo->Call(context, env->Global(), 0, NULL).ToLocalChecked();
 
   // With stepping all break locations are hit.
-  CHECK_EQ(65, break_point_hit_count);
+  CHECK_EQ(66, break_point_hit_count);
 
   v8::Debug::SetDebugEventListener(env->GetIsolate(), nullptr);
   CheckDebuggerUnloaded(env->GetIsolate());
 }
 
 
 static void DoDebugStepNamedStoreLoop(int expected) {
   DebugLocalContext env;
   v8::HandleScope scope(env->GetIsolate());
 
@@ skipping 23 matching lines @@
 
   // With stepping all expected break locations are hit.
   CHECK_EQ(expected, break_point_hit_count);
 
   v8::Debug::SetDebugEventListener(env->GetIsolate(), nullptr);
   CheckDebuggerUnloaded(env->GetIsolate());
 }
 
 
 // Test of the stepping mechanism for named load in a loop.
-TEST(DebugStepNamedStoreLoop) { DoDebugStepNamedStoreLoop(34); }
-
+TEST(DebugStepNamedStoreLoop) { DoDebugStepNamedStoreLoop(35); }
 
 // Test the stepping mechanism with different ICs.
 TEST(DebugStepLinearMixedICs) {
   DebugLocalContext env;
   v8::HandleScope scope(env->GetIsolate());
 
   // Register a debug event listener which steps and counts.
   v8::Debug::SetDebugEventListener(env->GetIsolate(), DebugEventStep);
 
   v8::Local<v8::Context> context = env.context();
@@ skipping 386 matching lines @@
   SetBreakPoint(foo, 8);  // "var a = 0;"
 
   // Each loop generates 4 or 5 steps depending on whether a is equal.
 
   // Looping 10 times.
   step_action = StepIn;
   break_point_hit_count = 0;
   v8::Local<v8::Value> argv_10[argc] = {v8::Number::New(isolate, 10)};
   result = foo->Call(context, env->Global(), argc, argv_10).ToLocalChecked();
   CHECK_EQ(5, result->Int32Value(context).FromJust());
-  CHECK_EQ(62, break_point_hit_count);
+  CHECK_EQ(63, break_point_hit_count);
 
   // Looping 100 times.
   step_action = StepIn;
   break_point_hit_count = 0;
   v8::Local<v8::Value> argv_100[argc] = {v8::Number::New(isolate, 100)};
   result = foo->Call(context, env->Global(), argc, argv_100).ToLocalChecked();
   CHECK_EQ(50, result->Int32Value(context).FromJust());
-  CHECK_EQ(557, break_point_hit_count);
+  CHECK_EQ(558, break_point_hit_count);
 
   // Get rid of the debug event listener.
   v8::Debug::SetDebugEventListener(isolate, nullptr);
   CheckDebuggerUnloaded(isolate);
 }
 
 
 TEST(DebugStepForBreak) {
   DebugLocalContext env;
   v8::Isolate* isolate = env->GetIsolate();
@@ skipping 25 matching lines @@
 
   // Each loop generates 5 steps except for the last (when break is executed)
   // which only generates 4.
 
   // Looping 10 times.
   step_action = StepIn;
   break_point_hit_count = 0;
   v8::Local<v8::Value> argv_10[argc] = {v8::Number::New(isolate, 10)};
   result = foo->Call(context, env->Global(), argc, argv_10).ToLocalChecked();
   CHECK_EQ(9, result->Int32Value(context).FromJust());
-  CHECK_EQ(64, break_point_hit_count);
+  CHECK_EQ(65, break_point_hit_count);
 
   // Looping 100 times.
   step_action = StepIn;
   break_point_hit_count = 0;
   v8::Local<v8::Value> argv_100[argc] = {v8::Number::New(isolate, 100)};
   result = foo->Call(context, env->Global(), argc, argv_100).ToLocalChecked();
   CHECK_EQ(99, result->Int32Value(context).FromJust());
-  CHECK_EQ(604, break_point_hit_count);
+  CHECK_EQ(605, break_point_hit_count);
 
   // Get rid of the debug event listener.
   v8::Debug::SetDebugEventListener(isolate, nullptr);
   CheckDebuggerUnloaded(isolate);
 }
 
 
 TEST(DebugStepForIn) {
   DebugLocalContext env;
   v8::HandleScope scope(env->GetIsolate());
@@ skipping 4695 matching lines @@
   CHECK_EQ(22, iterator->GetBreakLocation().position());
   iterator->Next();
   CHECK(iterator->GetBreakLocation().IsReturn());
   CHECK_EQ(50, iterator->GetBreakLocation().position());
   iterator->Next();
   CHECK(iterator->Done());
   delete iterator;
 
   DisableDebugger(isolate);
 }