Please, review a fix for:
https://bugs.openjdk.java.net/browse/JDK-8234882
CSR draft (one CSR reviewer is needed before finalizing it):
https://bugs.openjdk.java.net/browse/JDK-8245853
Webrev:
http://cr.openjdk.java.net/~sspitsyn/webrevs/2020/jvmti-stop-thread.1/src/
Updated JVM TI StopThread spec:
http://cr.openjdk.java.net/~sspitsyn/webrevs/2020/jvmti-stop-thread.1/docs/specs/jvmti.html#StopThread
Summary:
The JVM TI StopThread method mirrored the functionality of the
java.lang.Thread::stop(Throwable t) method, in that it allows any
exception
type to be installed as an asynchronous exception in the target thread.
However, the java.lang.Thread::stop(Throwable t) method was
inherently unsafe
and in Java 8 (under JDK-7059085) it was "retired" so that it always
threw
UnsupportedOperationException.
The updated JVM TI StopThread spec disallows an arbitrary Throwable
from being passed,
and instead restricts the argument to being an instance of
ThreadDeath, thus
mirroring the (deprecated but still functional)
java.lang.Thread::stop() method.
The error JVMTI_ERROR_INVALID_OBJECT is returned if the exception
argument
is not an instance of ThreadDeath.
Also, I will file similar RFE and CSR on the JDI and JDWP spec.
Testing:
Built docs and checked the doc has been generated as expected.
Will run the nsk.jvmti tests locally.
Will submit hs-tiers1-3 to make sure there are no regressions in the
JVM TI and JDI tests.
Thanks,
Serguei
