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src/java.base/share/classes/java/lang/invoke/DirectMethodHandle.java
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@@ -82,23 +82,25 @@
}
if (!member.isField()) {
switch (refKind) {
case REF_invokeSpecial: {
member = member.asSpecial();
- LambdaForm lform = preparedLambdaForm(member, callerClass);
- Class<?> checkClass = refc; // Class to use for receiver type check
- if (callerClass != null) {
- checkClass = callerClass; // potentially strengthen to caller class
+ // if caller is an interface we need to adapt to get the
+ // receiver check inserted
+ if (callerClass == null) {
+ throw new InternalError("callerClass must not be null for REF_invokeSpecial");
}
- return new Special(mtype, lform, member, checkClass);
+ LambdaForm lform = preparedLambdaForm(member, callerClass.isInterface());
+ return new Special(mtype, lform, member, callerClass);
}
case REF_invokeInterface: {
- LambdaForm lform = preparedLambdaForm(member, callerClass);
+ // we always adapt 'special' when dealing with interfaces
+ LambdaForm lform = preparedLambdaForm(member, true);
return new Interface(mtype, lform, member, refc);
}
default: {
- LambdaForm lform = preparedLambdaForm(member, callerClass);
+ LambdaForm lform = preparedLambdaForm(member);
return new DirectMethodHandle(mtype, lform, member);
}
}
} else {
LambdaForm lform = preparedFieldLambdaForm(member);
@@ -164,15 +166,19 @@
/**
* Create a LF which can invoke the given method.
* Cache and share this structure among all methods with
* the same basicType and refKind.
*/
- private static LambdaForm preparedLambdaForm(MemberName m, Class<?> callerClass) {
+ private static LambdaForm preparedLambdaForm(MemberName m, boolean adaptToSpecialIfc) {
assert(m.isInvocable()) : m; // call preparedFieldLambdaForm instead
MethodType mtype = m.getInvocationType().basicType();
assert(!m.isMethodHandleInvoke()) : m;
int which;
+ // MemberName.getReferenceKind may be different from the 'kind' passed to
+ // DMH.make. Specifically private/final methods that use a direct call
+ // have been adapted to REF_invokeSpecial, even though the actual
+ // invocation mode may be invokevirtual or invokeinterface.
switch (m.getReferenceKind()) {
case REF_invokeVirtual: which = LF_INVVIRTUAL; break;
case REF_invokeStatic: which = LF_INVSTATIC; break;
case REF_invokeSpecial: which = LF_INVSPECIAL; break;
case REF_invokeInterface: which = LF_INVINTERFACE; break;
@@ -182,11 +188,11 @@
if (which == LF_INVSTATIC && shouldBeInitialized(m)) {
// precompute the barrier-free version:
preparedLambdaForm(mtype, which);
which = LF_INVSTATIC_INIT;
}
- if (which == LF_INVSPECIAL && callerClass != null && callerClass.isInterface()) {
+ if (which == LF_INVSPECIAL && adaptToSpecialIfc) {
which = LF_INVSPECIAL_IFC;
}
LambdaForm lform = preparedLambdaForm(mtype, which);
maybeCompile(lform, m);
assert(lform.methodType().dropParameterTypes(0, 1)
@@ -194,11 +200,11 @@
: Arrays.asList(m, m.getInvocationType().basicType(), lform, lform.methodType());
return lform;
}
private static LambdaForm preparedLambdaForm(MemberName m) {
- return preparedLambdaForm(m, null);
+ return preparedLambdaForm(m, false);
}
private static LambdaForm preparedLambdaForm(MethodType mtype, int which) {
LambdaForm lform = mtype.form().cachedLambdaForm(which);
if (lform != null) return lform;
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