Consider running jtreg in CI

[qinsoon]

Build and test with jtreg

# build jtreg (clone jtreg)
bash make/build.sh --jdk /usr/lib/jvm/adoptopenjdk-11-hotspot-amd64/

# build openjdk with jtreg
export DEBUG_LEVEL=release && export MMTK_PLAN= && export RUSTUP_TOOLCHAIN=nightly-2022-02-11 && sh configure --disable-warnings-as-errors --with-debug-level=$DEBUG_LEVEL --with-jtreg=/home/yilin/Code/jtreg/build/images/jtreg  && make CONF=linux-x86_64-normal-server-$DEBUG_LEVEL THIRD_PARTY_HEAP=$PWD/../mmtk-openjdk/openjdk

# build with jtreg native
make build-test-hotspot-jtreg-native CONF=linux-x86_64-normal-server-$DEBUG_LEVEL THIRD_PARTY_HEAP=$PWD/../mmtk-openjdk/openjdk
make build-test-jdk-jtreg-native CONF=linux-x86_64-normal-server-$DEBUG_LEVEL THIRD_PARTY_HEAP=$PWD/../mmtk-openjdk/openjdk

It generates stuff in 
- build/linux-x86_64-normal-server-release/support/test/hotspot/jtreg/native/lib
- build/linux-x86_64-normal-server-release/support/test/jdk/jtreg/native/

# Run test
JDK_IMAGE_DIR=build/linux-x86_64-normal-server-release/jdk TEST_IMAGE_DIR=build/linux-x86_64-normal-server-release/support/test/ BOOT_JDK=/usr/lib/jvm/adoptopenjdk-11-hotspot-amd64/ JT_HOME=/home/yilin/Code/jtreg/build/images/jtreg make run-test-prebuilt TEST=tier1 JTREG="JAVA_OPTIONS=-XX:+UseThirdPartyHeap -XX:MetaspaceSize=500M

Useful links:

• https://adoptopenjdk.gitbooks.io/adoptopenjdk-getting-started-kit/content/en/intermediate-steps/how_to_use_jtreg_-_java_regression_test_harness.html
• https://github.com/openjdk/jdk/blob/master/.github/workflows/submit.yml
• https://github.com/openjdk/jtreg/blob/master/doc/building.md
• https://github.com/openjdk/jdk/blob/master/doc/testing.md

[qinsoon]

I ran the test with one of my dev branches. And the results are like below, comparing to running the tests with their stock GC (using the same build but without -XX:+UseThirdPartyHeap).

I probably did not config the test build correct. There are some failures that exist in both runs, which is possibly due to the incorrect test config. We would need to figure it out.

Results with Rust MMTk

==============================
Test summary
==============================
   TEST                                              TOTAL  PASS  FAIL ERROR   
>> jtreg:test/hotspot/jtreg:tier1                     1131   954   175     2 <<
>> jtreg:test/jdk:tier1                               1865  1767    84    14 <<
>> jtreg:test/langtools:tier1                         3910  3898     5     7 <<
   jtreg:test/nashorn:tier1                              0     0     0     0   
   jtreg:test/jaxp:tier1                                 0     0     0     0   
==============================
TEST FAILURE

Results with the stock GC

==============================
Test summary
==============================
   TEST                                              TOTAL  PASS  FAIL ERROR   
>> jtreg:test/hotspot/jtreg:tier1                     1428  1272   156     0 <<
>> jtreg:test/jdk:tier1                               1863  1811    52     0 <<
>> jtreg:test/langtools:tier1                         3911  3905     1     5 <<
   jtreg:test/nashorn:tier1                              0     0     0     0   
   jtreg:test/jaxp:tier1                                 0     0     0     0   
==============================
TEST FAILURE