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8263995: Incorrect double-checked locking in Types.arraySuperType()

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Reviewed-by: mcimadamore, jlahoda
This commit is contained in:
Aleksey Shipilev 2021-03-23 17:48:19 +00:00
parent d7268fa3a6
commit c087f3ed40
1 changed files with 4 additions and 8 deletions
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12
src/jdk.compiler/share/classes/com/sun/tools/javac/code/Types.java
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@ -4076,17 +4076,13 @@ public class Types {
return buf.toList();
}
private Type arraySuperType = null;
private Type arraySuperType;
private Type arraySuperType() {
// initialized lazily to avoid problems during compiler startup
if (arraySuperType == null) {
synchronized (this) {
if (arraySuperType == null) {
// JLS 10.8: all arrays implement Cloneable and Serializable.
arraySuperType = makeIntersectionType(List.of(syms.serializableType,
syms.cloneableType), true);
}
}
// JLS 10.8: all arrays implement Cloneable and Serializable.
arraySuperType = makeIntersectionType(List.of(syms.serializableType,
syms.cloneableType), true);
}
return arraySuperType;
}