Check that function being patched has no activations on any thread stack

src/runtime.h

 // Copyright 2006-2008 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 313 matching lines @@
   F(DebugGetPrototype, 1, 1) \
   F(SystemBreak, 0, 1) \
   F(DebugDisassembleFunction, 1, 1) \
   F(DebugDisassembleConstructor, 1, 1) \
   F(FunctionGetInferredName, 1, 1) \
   F(LiveEditFindSharedFunctionInfosForScript, 1, 1) \
   F(LiveEditGatherCompileInfo, 2, 1) \
   F(LiveEditReplaceScript, 3, 1) \
   F(LiveEditReplaceFunctionCode, 2, 1) \
   F(LiveEditRelinkFunctionToScript, 2, 1) \
-  F(LiveEditPatchFunctionPositions, 2, 1)
+  F(LiveEditPatchFunctionPositions, 2, 1) \
+  F(LiveEditCheckStackActivations, 1, 1)
 #else
 #define RUNTIME_FUNCTION_LIST_DEBUGGER_SUPPORT(F)
 #endif
 
 #ifdef ENABLE_LOGGING_AND_PROFILING
 #define RUNTIME_FUNCTION_LIST_PROFILER_SUPPORT(F) \
   F(ProfilerResume, 2, 1) \
   F(ProfilerPause, 2, 1)
 #else
 #define RUNTIME_FUNCTION_LIST_PROFILER_SUPPORT(F)
@@ skipping 87 matching lines @@
                                                 int position);
 
   // Helper functions used stubs.
   static void PerformGC(Object* result);
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_RUNTIME_H_