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问题描述: 方法的调用链不能根据 callDepth 来判断,不然所有层级相等的深度,都在一个调用链路中了。
解决方案: 通过 lr 作为方法调用的标识,作为方法调用链更加合理。
测试验证: 新增
+[SMCallTraceDemo test]
测试代码来验证 lr 的合理性。测试数据如下: