# Join point

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In [computer science](/source/computer_science), a '''join point''' is a point in the [control flow](/source/control_flow) of a [program](/source/computer_program) where the control flow can arrive via two different paths. In particular, it's a [basic block](/source/basic_block) that has more than one [predecessor](/source/Glossary_of_graph_theory_terms).<ref>{{Cite book|title=Engineering a compiler|last=Cooper|first=Keith D.|date=2012|publisher=Elsevier/Morgan Kaufmann|others=Torczon, Linda.|isbn=978-0120884780|edition=2nd|location=Amsterdam|pages=476|oclc=714113472}}</ref> In [aspect-oriented programming](/source/aspect-oriented_programming) a [set](/source/set_(mathematics)) of join points is called a [pointcut](/source/pointcut). A join point is a specification of when, in the corresponding main program, the [aspect](/source/Aspect_(computer_science)) code should be executed.

The join point is a point of execution in the base code where the [advice](/source/Advice_(programming)) specified in a corresponding [pointcut](/source/pointcut) is applied.

== See also ==
*[AspectJ](/source/AspectJ), an aspect-oriented extension for the [Java](/source/Java_(programming_language)) [programming language](/source/programming_language)

==References==
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Category:Aspect-oriented software development
Category:Aspect-oriented programming
Category:Control flow

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