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Make lazy vals run on non-fallback graal image - remove dynamic reflection #16346

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Merged
merged 2 commits into from
Nov 18, 2022
Merged

Make lazy vals run on non-fallback graal image - remove dynamic reflection #16346

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73d807a
Make lazy vals run on non-fallback graal image - remove dynamic refle…
szymon-rd Nov 15, 2022
57a04cd
Keep the ExceptionInitializerError when field not found
szymon-rd Nov 17, 2022
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28 changes: 15 additions & 13 deletions library/src/scala/runtime/LazyVals.scala
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Original file line number Diff line number Diff line change
Expand Up @@ -9,19 +9,21 @@ import scala.annotation.*
*/
object LazyVals {
@nowarn
private[this] val unsafe: sun.misc.Unsafe =
classOf[sun.misc.Unsafe].getDeclaredFields.nn.find { field =>
field.nn.getType == classOf[sun.misc.Unsafe] && {
field.nn.setAccessible(true)
true
}
}
.map(_.nn.get(null).asInstanceOf[sun.misc.Unsafe])
.getOrElse {
throw new ExceptionInInitializerError {
new IllegalStateException("Can't find instance of sun.misc.Unsafe")
}
}
private[this] val unsafe: sun.misc.Unsafe = {
def throwInitializationException() =
throw new ExceptionInInitializerError(
new IllegalStateException("Can't find instance of sun.misc.Unsafe")
)
try
val unsafeField = classOf[sun.misc.Unsafe].getDeclaredField("theUnsafe").nn
if unsafeField.getType == classOf[sun.misc.Unsafe] then
unsafeField.setAccessible(true)
unsafeField.get(null).asInstanceOf[sun.misc.Unsafe]
else
throwInitializationException()
catch case _: NoSuchFieldException =>
throwInitializationException()
}

private[this] val base: Int = {
val processors = java.lang.Runtime.getRuntime.nn.availableProcessors()
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