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8244413: Avoid rebinds in MethodHandle.viewAsType

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Reviewed-by: mchung, jrose
This commit is contained in:
Claes Redestad 2020-05-06 15:51:49 +02:00
parent 463e377053
commit 72704aaba1
4 changed files with 92 additions and 36 deletions
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7
src/java.base/share/classes/java/lang/invoke/MethodHandles.java
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@ -3282,11 +3282,10 @@ return mh1;
* @since 1.8
*/
public MethodHandleInfo revealDirect(MethodHandle target) {
MemberName member = target.internalMemberName();
if (member == null || (!member.isResolved() &&
!member.isMethodHandleInvoke() &&
!member.isVarHandleMethodInvoke()))
if (!target.isCrackable()) {
throw newIllegalArgumentException("not a direct method handle");
}
MemberName member = target.internalMemberName();
Class<?> defc = member.getDeclaringClass();
byte refKind = member.getReferenceKind();
assert(MethodHandleNatives.refKindIsValid(refKind));