[turbofan] Fix source position integration with Linux perf

src/isolate.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.
 
 #include "src/isolate.h"
 
 #include <stdlib.h>
 
 #include <fstream>  // NOLINT(readability/streams)
 #include <sstream>
@@ skipping 2800 matching lines @@
 
 
 bool Isolate::use_crankshaft() const {
   return FLAG_crankshaft &&
          !serializer_enabled_ &&
          CpuFeatures::SupportsCrankshaft();
 }
 
 bool Isolate::NeedsSourcePositionsForProfiling() const {
   return FLAG_trace_deopt || FLAG_trace_turbo || FLAG_trace_turbo_graph ||
-         FLAG_turbo_profiling || is_profiling() || debug_->is_active() ||
-         logger_->is_logging();
+         FLAG_turbo_profiling || FLAG_perf_prof || is_profiling() ||
+         debug_->is_active() || logger_->is_logging();
 }
 
 bool Isolate::IsArrayOrObjectPrototype(Object* object) {
   Object* context = heap()->native_contexts_list();
   while (!context->IsUndefined(this)) {
     Context* current_context = Context::cast(context);
     if (current_context->initial_object_prototype() == object ||
         current_context->initial_array_prototype() == object) {
       return true;
     }
@@ skipping 720 matching lines @@
   // Then check whether this scope intercepts.
   if ((flag & intercept_mask_)) {
     intercepted_flags_ |= flag;
     return true;
   }
   return false;
 }
 
 }  // namespace internal
 }  // namespace v8