git: openjdk/loom: fibers: 2 new changesets

[duke]

Changeset: 9e981cd4
Author:    chris.plummer <chris.plummer at oracle.com>
Date:      2020-02-24 22:41:05 +0000
URL:       https://git.openjdk.java.net/loom/commit/9e981cd4

Improve/fix printf messages.

! test/hotspot/jtreg/serviceability/jvmti/DoContinueSingleStepTest/libDoContinueSingleStepTest.cpp

Changeset: 3bbda7a3
Author:    chris.plummer <chris.plummer at oracle.com>
Date:      2020-02-24 22:43:04 +0000
URL:       https://git.openjdk.java.net/loom/commit/3bbda7a3

This test sometimes failed due to never hitting the breakpoint in Continuation.run(). This is because if every vthread is mounted on a carrier thread, you may never see another call to Continuation.run(). Allow at most 2 carrier threads for the 3 vthreads.

! test/hotspot/jtreg/serviceability/jvmti/DoContinueSingleStepTest/DoContinueSingleStepTest.java