Each probe clause consists of a probe point specification statement, action block, and an optional predicate.

每个探测子句由一个探测点指定语句、动作块和可选的断言组成。

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The probe point specification identifies a code location whose execution or an event whose occurrence should trigger the probe actions.

探测点指定语句指定应该触发探测动作的代码位置或事件。

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