This function verifies that the address provided is in valid memory.
这个函数校验有效内存中提供的地址。
For more information on valid memory configurations, please see the system documentation on the technical support web site.
有关有效的内存配置的详细信息，请参阅技术支持Web站点上的系统说明文件。
As mentioned above, the edge of mapped memory — last valid address — is often known as the system break or the current break.
如前所述，被映射的内存的边界(最后一个有效地址)常被称为系统中断点或者当前中断点。
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