CPU profiler: limit the number of simultaneously collected profiles.

src/profile-generator.cc

 // Copyright 2010 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 474 matching lines @@
   current_profiles_.Iterate(DeleteCpuProfile);
   profiles_by_token_.Iterate(DeleteProfilesList);
   code_entries_.Iterate(DeleteCodeEntry);
   args_count_names_.Iterate(DeleteArgsCountName);
 }
 
 
 bool CpuProfilesCollection::StartProfiling(const char* title, unsigned uid) {
   ASSERT(uid > 0);
   current_profiles_semaphore_->Wait();
+  if (current_profiles_.length() >= kMaxSimultaneousProfiles) {
+    current_profiles_semaphore_->Signal();
+    return false;
+  }
   for (int i = 0; i < current_profiles_.length(); ++i) {
     if (strcmp(current_profiles_[i]->title(), title) == 0) {
       // Ignore attempts to start profile with the same title.
       current_profiles_semaphore_->Signal();
       return false;
     }
   }
   current_profiles_.Add(new CpuProfile(title, uid));
   current_profiles_semaphore_->Signal();
   return true;
@@ skipping 1619 matching lines @@
     HeapEntry* entry = added_entries[i];
     if (entry->painted_reachable())
       diff->AddAddedEntry(add_child_index++, added_entry_index++, entry);
   }
   return diff;
 }
 
 } }  // namespace v8::internal
 
 #endif  // ENABLE_LOGGING_AND_PROFILING