打印关于 addr 单元内存的特殊细节，包括它的储存单元（堆叠，累计，文本）以及，如果它累计了大量内存，还有它的分配调用链和释放历史。
Prints specific details about the memory at location addr, including its location (stack, heap, text) and, if it is heap memory, then the call chains of its allocation and free history.
内存分配器必须的数据结构来组织关于内存的分配和释放内存块的信息使用。
The memory allocator must use some memory for data structures to organize information about blocks of memory that are allocated and freed.
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