Always include debugger support.

src/isolate.h

 // 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 77 matching lines @@
 class ThreadVisitor;  // Defined in v8threads.h
 class UnicodeCache;
 template <StateTag Tag> class VMState;
 
 // 'void function pointer', used to roundtrip the
 // ExternalReference::ExternalReferenceRedirector since we can not include
 // assembler.h, where it is defined, here.
 typedef void* ExternalReferenceRedirectorPointer();
 
 
-#ifdef ENABLE_DEBUGGER_SUPPORT
 class Debug;
 class Debugger;
 class DebuggerAgent;
-#endif
 
 #if !defined(__arm__) && V8_TARGET_ARCH_ARM || \
     !defined(__aarch64__) && V8_TARGET_ARCH_ARM64 || \
     !defined(__mips__) && V8_TARGET_ARCH_MIPS
 class Redirection;
 class Simulator;
 #endif
 
 
 // Static indirection table for handles to constants.  If a frame
@@ skipping 190 matching lines @@
   // Head of the list of live LookupResults.
   LookupResult* top_lookup_result_;
 
  private:
   void InitializeInternal();
 
   Address try_catch_handler_address_;
 };
 
 
-#ifdef ENABLE_DEBUGGER_SUPPORT
-
-#define ISOLATE_DEBUGGER_INIT_LIST(V)                                          \
-  V(DebuggerAgent*, debugger_agent_instance, NULL)
-#else
-
-#define ISOLATE_DEBUGGER_INIT_LIST(V)
-
-#endif
-
-
 #if V8_TARGET_ARCH_ARM && !defined(__arm__) || \
     V8_TARGET_ARCH_ARM64 && !defined(__aarch64__) || \
     V8_TARGET_ARCH_MIPS && !defined(__mips__)
 
 #define ISOLATE_INIT_SIMULATOR_LIST(V)                                         \
   V(bool, simulator_initialized, false)                                        \
   V(HashMap*, simulator_i_cache, NULL)                                         \
   V(Redirection*, simulator_redirection, NULL)
 #else
 
@@ skipping 52 matching lines @@
   V(int, ast_node_id, 0)                                                       \
   V(unsigned, ast_node_count, 0)                                               \
   V(bool, microtask_pending, false)                                            \
   V(bool, autorun_microtasks, true)                                            \
   V(HStatistics*, hstatistics, NULL)                                           \
   V(HTracer*, htracer, NULL)                                                   \
   V(CodeTracer*, code_tracer, NULL)                                            \
   V(bool, fp_stubs_generated, false)                                           \
   V(int, max_available_threads, 0)                                             \
   V(uint32_t, per_isolate_assert_data, 0xFFFFFFFFu)                            \
-  ISOLATE_INIT_SIMULATOR_LIST(V)                                               \
-  ISOLATE_DEBUGGER_INIT_LIST(V)
+  V(DebuggerAgent*, debugger_agent_instance, NULL)                             \
+  ISOLATE_INIT_SIMULATOR_LIST(V)
 
 #define THREAD_LOCAL_TOP_ACCESSOR(type, name)                        \
   inline void set_##name(type v) { thread_local_top_.name##_ = v; }  \
   inline type name() const { return thread_local_top_.name##_; }
 
 
 class Isolate {
   // These forward declarations are required to make the friend declarations in
   // PerIsolateThreadData work on some older versions of gcc.
   class ThreadDataTable;
@@ skipping 549 matching lines @@
 
   RegExpStack* regexp_stack() { return regexp_stack_; }
 
   unibrow::Mapping<unibrow::Ecma262Canonicalize>*
       interp_canonicalize_mapping() {
     return &interp_canonicalize_mapping_;
   }
 
   inline bool IsCodePreAgingActive();
 
-#ifdef ENABLE_DEBUGGER_SUPPORT
   Debugger* debugger() {
     if (!NoBarrier_Load(&debugger_initialized_)) InitializeDebugger();
     return debugger_;
   }
   Debug* debug() {
     if (!NoBarrier_Load(&debugger_initialized_)) InitializeDebugger();
     return debug_;
   }
-#endif
 
   inline bool IsDebuggerActive();
   inline bool DebuggerHasBreakPoints();
 
   CpuProfiler* cpu_profiler() const { return cpu_profiler_; }
   HeapProfiler* heap_profiler() const { return heap_profiler_; }
 
 #ifdef DEBUG
   HistogramInfo* heap_histograms() { return heap_histograms_; }
 
@@ skipping 298 matching lines @@
 
   // Time stamp at initialization.
   double time_millis_at_init_;
 
 #ifdef DEBUG
   // A static array of histogram info for each type.
   HistogramInfo heap_histograms_[LAST_TYPE + 1];
   JSObject::SpillInformation js_spill_information_;
 #endif
 
-#ifdef ENABLE_DEBUGGER_SUPPORT
   Debugger* debugger_;
   Debug* debug_;
-#endif
   CpuProfiler* cpu_profiler_;
   HeapProfiler* heap_profiler_;
   FunctionEntryHook function_entry_hook_;
 
 #define GLOBAL_BACKING_STORE(type, name, initialvalue)                         \
   type name##_;
   ISOLATE_INIT_LIST(GLOBAL_BACKING_STORE)
 #undef GLOBAL_BACKING_STORE
 
 #define GLOBAL_ARRAY_BACKING_STORE(type, name, length)                         \
@@ skipping 215 matching lines @@
   }
 
   EmbeddedVector<char, 128> filename_;
   FILE* file_;
   int scope_depth_;
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_ISOLATE_H_