Simulates reading size bytes starting at address addr, generates any purify errors that read would cause, and calls purify_stop_here upon error.

模拟阅读开始于addr的size字节，产生读取将会导致的任何purify错误，根据错误调用purify_stop_here。

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Simulates writing size bytes starting at address addr, generates any Purify errors that write would cause, and calls purify_stop_here upon error.

模拟写入开始于 addr 的 size 字节，产生写入将会导致的任何 Purify 错误，根据错误调用 purify_stop_here。

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The simplest is purify_watch (addr), which sets a read-write watch point on four bytes starting at the given address.

最简单的是purify_watch (addr)，它在特定地址的四个字节上设置了一个读取-写入观察点。

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