This is intentional. The lambda proxy classes are defined as VM
anonymous classes through a JDK internal API
Unsafe::defineAnonymousClass. These generated classes are JDK
implementation details that are hidden for any class lookup and not
modifiable by JVM TI agent.
JDK-8171335 is the RFE to define a supported API to replace Unsafe VM
anonymous class. We have a prototype in the "nestmates" branch in
valhalla repo [1].
Mandy
[1] http://hg.openjdk.java.net/valhalla/valhalla/
On 8/5/19 2:02 PM, Raffaello Giulietti wrote:
Hello,
experiment suggests that classes generated by
java.lang.invoke.LambdaMetafactory are somewhat special:
(1) getName() on the class returns a string of the form
Xxx$$Lambda$nn/0xhhh
where Xxx is a fully qualified class name (with periods '.' as package
separators), nn is a decimal integer and hhh is a hex integer. What's
the role of the slash '/' in the name?
(2) An invocation of Class.forName() with that name fails.
(3) Invoking java.lang.instrument.Instrumentation.isModifiableClass()
with that class as an argument returns false.
Is this intentional or is it a bug?
Greetings
Raffaello
