backtrace部分是不是可以参考AliOS-Things中的backtraceFromStack

现有的backtrace依赖于glibc，如果像AliOS-Things中那样从栈上回溯调用栈，可以不依赖外界资源，当然，需要处理不同平台的差异（比如x86架构和arm架构的栈帧解析方式是有差异的）

Start by comparing the existing glibc-dependent backtrace path with AliOS-Things' backtraceFromStack approach, then map the x86 and ARM stack-frame differences mentioned in the issue. Done means determining whether a platform-aware, self-contained implementation can replace the external dependency and documenting the supported-platform scope.

Written by the indexing model from the issue text.