On 7/6/17 10:33 AM, Sean Mullan wrote:
On 7/5/17 4:01 PM, Adam Petcher wrote:
Very interesting. The exception originates in the VM, so I added the
hotspot-dev list to the discussion. It looks like the VM either can't
find the method, or it decides that it's not the right kind of method.
Right. The check that is causing this error is in jvm.cpp [1]:
1271 if (m.is_null() || !m->is_method() || !m()->is_public() ||
m()->is_static()) {
1272 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "No run method");
1273 }
I'll file a bug unless someone has a good explanation for this behavior.
Bug now filed: https://bugs.openjdk.java.net/browse/JDK-8183962
--Sean
Thanks,
Sean
[1]
http://hg.openjdk.java.net/jdk9/jdk9/hotspot/file/1ca8f038fceb/src/share/vm/prims/jvm.cpp#l1271
On 7/4/2017 7:57 AM, Michael Rasmussen wrote:
Hi
I was playing around with having an easy way to have doPrivileged call
void methods via lambdas/method references, and noticed that if you
use AccessController.doPrivileged(PrivilegedAction), and the run
method is implemented as a default method, then you get the following
exception: java.lang.InternalError: No run method
I failed finding anywhere in the documentation stating this should not
be supported, or a bug report about it, so writing/asking here.
See example code below
Kind regards
Michael Rasmussen
//----
package com.test;
import java.security.AccessController;
import java.security.PrivilegedAction;
public class Test {
interface VoidPrivilegedAction extends PrivilegedAction<Void> {
void perform();
@Override
default Void run() {
perform();
return null;
}
}
static void doPrivileged(VoidPrivilegedAction act) {
AccessController.doPrivileged(act);
}
public static void main(String[] args) throws Exception {
doPrivileged(() ->
System.out.println(System.getProperty("java.home")));
}
}
//----
Exception in thread "main" java.lang.InternalError: No run method
at java.security.AccessController.doPrivileged(Native Method)
at com.test.Test.doPrivileged(Test.java:18)
at com.test.Test.main(Test.java:22)
