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author | Jason Zaugg <jzaugg@gmail.com> | 2014-02-08 14:57:43 +0100 |
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committer | Jason Zaugg <jzaugg@gmail.com> | 2014-02-08 14:57:43 +0100 |
commit | 21a765feb0efeeecd671ede637a12f5088ac8257 (patch) | |
tree | 5e3bf3a75c0dc8a505ba7033470fe50ed2250039 /test/files/run/reflection-sync-potpourri.scala | |
parent | 896e7cc42e703f735c8fefbb51c6e700a6651814 (diff) | |
parent | dc3fccb59d9ac848550b3264608ce9b7bdbfe624 (diff) | |
download | scala-21a765feb0efeeecd671ede637a12f5088ac8257.tar.gz scala-21a765feb0efeeecd671ede637a12f5088ac8257.tar.bz2 scala-21a765feb0efeeecd671ede637a12f5088ac8257.zip |
Merge pull request #3391 from xeno-by/ticket/8131
SI-8131 fixes residual race condition in runtime reflection
Diffstat (limited to 'test/files/run/reflection-sync-potpourri.scala')
-rw-r--r-- | test/files/run/reflection-sync-potpourri.scala | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/test/files/run/reflection-sync-potpourri.scala b/test/files/run/reflection-sync-potpourri.scala new file mode 100644 index 0000000000..0c96974df7 --- /dev/null +++ b/test/files/run/reflection-sync-potpourri.scala @@ -0,0 +1,32 @@ +import scala.reflect.runtime.universe._ + +// this test checks that under heavily multithreaded conditions: +// 1) scala.reflect.runtime.universe, its rootMirror and definitions are initialized correctly +// 2) symbols are correctly materialized into PackageScopes (no dupes) +// 3) unpickling works okay even we unpickle the same symbol a lot of times + +object Test extends App { + def foo[T: TypeTag](x: T) = typeOf[T].toString + val n = 1000 + val rng = new scala.util.Random() + val types = List( + () => typeOf[java.lang.reflect.Method], + () => typeOf[java.lang.annotation.Annotation], + () => typeOf[scala.io.BufferedSource], + () => typeOf[scala.io.Codec]) + val perms = types.permutations.toList + def force(lazytpe: () => Type): String = { + lazytpe().typeSymbol.typeSignature + lazytpe().toString + } + val diceRolls = List.fill(n)(rng.nextInt(perms.length)) + val threads = (1 to n) map (i => new Thread(s"Reflector-$i") { + override def run(): Unit = { + val s1 = foo("42") + val s2 = perms(diceRolls(i - 1)).map(x => force(x)).sorted.mkString(", ") + assert(s1 == "String" || s1 == "java.lang.String") + assert(s2 == "java.lang.annotation.Annotation, java.lang.reflect.Method, scala.io.BufferedSource, scala.io.Codec") + } + }) + threads foreach (_.start) +}
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