Only install JitCodeEventHandler for GDB JIT if requested.

src/d8.cc

 // Copyright 2012 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.
 
 
 // Defined when linking against shared lib on Windows.
 #if defined(USING_V8_SHARED) && !defined(V8_SHARED)
 #define V8_SHARED
 #endif
 
@@ skipping 1564 matching lines @@
   constraints.ConfigureDefaults(base::OS::TotalPhysicalMemory(),
                                 base::OS::MaxVirtualMemory(),
                                 base::OS::NumberOfProcessorsOnline());
   v8::SetResourceConstraints(isolate, &constraints);
 #endif
   DumbLineEditor dumb_line_editor(isolate);
   {
     Isolate::Scope scope(isolate);
     Initialize(isolate);
 #ifdef ENABLE_GDB_JIT_INTERFACE
-    v8::V8::SetJitCodeEventHandler(v8::kJitCodeEventDefault,
-                                   i::GDBJITInterface::EventHandler);
+    if (i::FLAG_gdbjit) {
+      v8::V8::SetJitCodeEventHandler(v8::kJitCodeEventDefault,
+                                     i::GDBJITInterface::EventHandler);
+    }
 #endif
 #ifdef ENABLE_VTUNE_JIT_INTERFACE
     vTune::InitializeVtuneForV8();
 #endif
     PerIsolateData data(isolate);
     InitializeDebugger(isolate);
 
 #ifndef V8_SHARED
     if (options.dump_heap_constants) {
       DumpHeapConstants(reinterpret_cast<i::Isolate*>(isolate));
@@ skipping 49 matching lines @@
 }
 
 }  // namespace v8
 
 
 #ifndef GOOGLE3
 int main(int argc, char* argv[]) {
   return v8::Shell::Main(argc, argv);
 }
 #endif