The Compiler team needs to review this as well, so added
hotspot-compiler-dev mailing list.
Thanks,
Serguei
On 10/29/18 11:13, Daniil Titov wrote:
Please review the change that fixes the issue when the test hangs with Graal
and XComp mode on.
One of the test cases the test runs is to call
com.sun.jdi.VirtualMachine.redefineClasses() while the target VM is suspended.
The bytes passed to com.sun.jdi.VirtualMachine.redefineClasses() don't
correspond to the reference type (the names do not match) and the test expects
NoClassDefFoundError to be thrown.
The problem here is that the compiler thread is suspended while "JDWP Transport
Listener" thread enters CompileBroker::wait_for_jvmci_completion() method and the
code inside CompileBroker::wait_for_jvmci_completion() method falsely assumes that some
progress by the compiler thread was made. As a result, it resets the progress wait
attempt counter and goes into an endless loop waiting for JVMCI to complete the
compilation.
Webrev: http://cr.openjdk.java.net/~dtitov/8195627/webrev.01/
Issue: https://bugs.openjdk.java.net/browse/JDK-8195627
Thanks!
--Daniil
