1. A method of analyzing a call stack available to a runtime and comprising a first call stack frame, respective runtime comprising a call stack frame map identifying memory addresses of call stack frames created by the runtime, and the method comprising: requesting the runtime to claim the first call stack frame; upon the runtime claiming the first call stack frame by locating the memory address of the first call stack frame in the call stack frame map, analyzing the first call stack frame with the claiming runtime; and upon all runtimes declining to claim the first call stack frame, analyzing the first call stack frame with a native code call stack frame analyzer, where the claiming runtime is different from the native code stack frame analyzer.