Merge with mmtk/mmtk-openjdk@master (#234)

Author: caizixian

.github/scripts/ci-test-global-alloc-bit.sh renamed to .github/scripts/ci-test-vo-bit.sh

@@ -5,7 +5,7 @@ set -xe
 unset JAVA_TOOL_OPTIONS
 
 export MMTK_EXTREME_ASSERTIONS=0
-export GLOBAL_ALLOC_BIT=1
+export VO_BIT=1
 . $(dirname "$0")/ci-build.sh
 
 cd $OPENJDK_PATH

.github/scripts/ci-test.sh

@@ -10,6 +10,6 @@ cd $cur
 cd $cur
 ./ci-test-assertions.sh
 cd $cur
-./ci-test-global-alloc-bit.sh
+./ci-test-vo-bit.sh
 cd $cur
 ./ci-test-malloc-mark-sweep.sh

.github/workflows/ci.yml

@@ -24,8 +24,8 @@ jobs:
         run: |
           ./.github/scripts/ci-build.sh
           ./.github/scripts/ci-test-only-normal.sh
-      - name: DaCapo Tests with global allocation bit
-        run: ./.github/scripts/ci-test-global-alloc-bit.sh
+      - name: DaCapo Tests with valid object bit (VO bit)
+        run: ./.github/scripts/ci-test-vo-bit.sh
       - name: DaCapo Tests with malloc Mark-Sweep
         run: ./.github/scripts/ci-test-malloc-mark-sweep.sh
 

README.md

@@ -197,12 +197,14 @@ building OpenJDK, we can change its location to be in the object's header:
 $ MARK_IN_HEADER=1 make CONF=linux-x86_64-normal-server-$DEBUG_LEVEL THIRD_PARTY_HEAP=$PWD/../mmtk-openjdk/openjdk
 ```
 
-### Alloc bit
-To support the `global_alloc_bit` feature in mmtk-core, you can set the environment variable `GLOBAL_ALLOC_BIT=1` when
-building OpenJDK. This will set the feature for mmtk-core, as well as compiling the fastpath for the alloc bit.
+### Valid object bit
+
+To support the `vo_bit` (valid object bit) feature in mmtk-core, you can set the
+environment variable `VO_BIT=1` when building OpenJDK. This will set the feature
+for mmtk-core, as well as compiling the fastpath for the VO bit.
 
 ```console
-$ GLOBAL_ALLOC_BIT=1 make CONF=linux-x86_64-normal-server-$DEBUG_LEVEL THIRD_PARTY_HEAP=$PWD/../mmtk-openjdk/openjdk
+$ VO_BIT=1 make CONF=linux-x86_64-normal-server-$DEBUG_LEVEL THIRD_PARTY_HEAP=$PWD/../mmtk-openjdk/openjdk
 ```
 
 ## Test