Do not enter the debugger when debugger is not active.

test/cctest/test-heap.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 
 #include <stdlib.h>
 
 #include "v8.h"
 
 #include "execution.h"
 #include "factory.h"
 #include "macro-assembler.h"
 #include "global-handles.h"
@@ skipping 966 matching lines @@
   CHECK(!function->shared()->is_compiled() || function->IsOptimized());
   CHECK(!function->is_compiled() || function->IsOptimized());
   // Call foo to get it recompiled.
   CompileRun("foo()");
   CHECK(function->shared()->is_compiled());
   CHECK(function->is_compiled());
 }
 
 
 // Count the number of global contexts in the weak list of global contexts.
-static int CountGlobalContexts() {
+int CountGlobalContexts() {
   int count = 0;
   Object* object = HEAP->global_contexts_list();
   while (!object->IsUndefined()) {
     count++;
     object = Context::cast(object)->get(Context::NEXT_CONTEXT_LINK);
   }
   return count;
 }
 
 
@@ skipping 927 matching lines @@
   HEAP->CollectAllGarbage(Heap::kNoGCFlags, "triggered by test 1");
   CHECK_GE(number_of_test_pages + 1, old_pointer_space->CountTotalPages());
   HEAP->CollectAllGarbage(Heap::kNoGCFlags, "triggered by test 2");
   CHECK_GE(number_of_test_pages + 1, old_pointer_space->CountTotalPages() * 2);
 
   // Triggering a last-resort GC should cause all pages to be released
   // to the OS so that other processes can seize the memory.
   HEAP->CollectAllAvailableGarbage("triggered really hard");
   CHECK_EQ(1, old_pointer_space->CountTotalPages());
 }