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8187826: Avoid using reflection to bootstrap NamedFunctions

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Reviewed-by: psandoz
This commit is contained in:
Claes Redestad 2017-09-27 17:56:00 +02:00
parent 2e46c1508a
commit 0355224df8
3 changed files with 48 additions and 36 deletions
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49
src/java.base/share/classes/java/lang/invoke/DirectMethodHandle.java
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@ -753,42 +753,38 @@ class DirectMethodHandle extends MethodHandle {
return nf;
}
private static final MethodType OBJ_OBJ_TYPE = MethodType.methodType(Object.class, Object.class);
private static final MethodType LONG_OBJ_TYPE = MethodType.methodType(long.class, Object.class);
private static NamedFunction createFunction(byte func) {
try {
switch (func) {
case NF_internalMemberName:
return new NamedFunction(DirectMethodHandle.class
.getDeclaredMethod("internalMemberName", Object.class));
return getNamedFunction("internalMemberName", OBJ_OBJ_TYPE);
case NF_internalMemberNameEnsureInit:
return new NamedFunction(DirectMethodHandle.class
.getDeclaredMethod("internalMemberNameEnsureInit", Object.class));
return getNamedFunction("internalMemberNameEnsureInit", OBJ_OBJ_TYPE);
case NF_ensureInitialized:
return new NamedFunction(DirectMethodHandle.class
.getDeclaredMethod("ensureInitialized", Object.class));
return getNamedFunction("ensureInitialized", MethodType.methodType(void.class, Object.class));
case NF_fieldOffset:
return new NamedFunction(DirectMethodHandle.class
.getDeclaredMethod("fieldOffset", Object.class));
return getNamedFunction("fieldOffset", LONG_OBJ_TYPE);
case NF_checkBase:
return new NamedFunction(DirectMethodHandle.class
.getDeclaredMethod("checkBase", Object.class));
return getNamedFunction("checkBase", OBJ_OBJ_TYPE);
case NF_staticBase:
return new NamedFunction(DirectMethodHandle.class
.getDeclaredMethod("staticBase", Object.class));
return getNamedFunction("staticBase", OBJ_OBJ_TYPE);
case NF_staticOffset:
return new NamedFunction(DirectMethodHandle.class
.getDeclaredMethod("staticOffset", Object.class));
return getNamedFunction("staticOffset", LONG_OBJ_TYPE);
case NF_checkCast:
return new NamedFunction(DirectMethodHandle.class
.getDeclaredMethod("checkCast", Object.class, Object.class));
return getNamedFunction("checkCast", MethodType.methodType(Object.class, Object.class, Object.class));
case NF_allocateInstance:
return new NamedFunction(DirectMethodHandle.class
.getDeclaredMethod("allocateInstance", Object.class));
return getNamedFunction("allocateInstance", OBJ_OBJ_TYPE);
case NF_constructorMethod:
return new NamedFunction(DirectMethodHandle.class
.getDeclaredMethod("constructorMethod", Object.class));
return getNamedFunction("constructorMethod", OBJ_OBJ_TYPE);
case NF_UNSAFE:
return new NamedFunction(new MemberName(MethodHandleStatics.class
.getDeclaredField("UNSAFE")));
MemberName member = new MemberName(MethodHandleStatics.class, "UNSAFE", Unsafe.class, REF_getField);
return new NamedFunction(
MemberName.getFactory()
.resolveOrFail(REF_getField, member, DirectMethodHandle.class, NoSuchMethodException.class));
default:
throw newInternalError("Unknown function: " + func);
}
@ -797,6 +793,15 @@ class DirectMethodHandle extends MethodHandle {
}
}
private static NamedFunction getNamedFunction(String name, MethodType type)
throws ReflectiveOperationException
{
MemberName member = new MemberName(DirectMethodHandle.class, name, type, REF_invokeStatic);
return new NamedFunction(
MemberName.getFactory()
.resolveOrFail(REF_invokeStatic, member, DirectMethodHandle.class, NoSuchMethodException.class));
}
static {
// The Holder class will contain pre-generated DirectMethodHandles resolved
// speculatively using MemberName.getFactory().resolveOrNull. However, that