diff --git a/.github/workflows/check_pr.yml b/.github/workflows/check_pr.yml
index 7e2c08f63924f6da1c0df8998aa8a9b4ed505d9d..0e7f33dc9dc7d74fed48af17c28d44edf3e67fb5 100644
--- a/.github/workflows/check_pr.yml
+++ b/.github/workflows/check_pr.yml
@@ -100,6 +100,74 @@ jobs:
           #run: |
           #make test TEST="hotspot_tier1 jdk_tier1"
 
+  build_fastdebug_jdk:
+    runs-on: ubuntu-latest
+    container:
+      image: docker.io/dragonwelljdk/build_jdk:8u
+    steps:
+      - name: Check out alibaba/dragonwell8_hotspot
+        uses: actions/checkout@v2
+        with:
+            path: 'hotspot'
+      - name: Check out alibaba/dragonwell8_corba
+        uses: actions/checkout@v2
+        with:
+          repository: 'alibaba/dragonwell8_corba'
+          path: 'corba'
+      - name: Check out alibaba/dragonwell8_langtools
+        uses: actions/checkout@v2
+        with:
+          repository: 'alibaba/dragonwell8_langtools'
+          path: 'langtools'
+      - name: Check out alibaba/dragonwell8
+        uses: actions/checkout@v2
+        with:
+          repository: 'alibaba/dragonwell8'
+          path: 'dragonwell8'
+      - name: Check out alibaba/dragonwell8_jdk
+        uses: actions/checkout@v2
+        with:
+          repository: 'alibaba/dragonwell8_jdk'
+          path: 'jdk'
+      - name: Check out alibaba/dragonwell8_jaxws
+        uses: actions/checkout@v2
+        with:
+          repository: 'alibaba/dragonwell8_jaxws'
+          path: 'jaxws'
+      - name: Check out alibaba/dragonwell8_jaxp
+        uses: actions/checkout@v2
+        with:
+          repository: 'alibaba/dragonwell8_jaxp'
+          path: 'jaxp'
+      - name: Check out alibaba/dragonwell8_nashorn
+        uses: actions/checkout@v2
+        with:
+          repository: 'alibaba/dragonwell8_nashorn'
+          path: 'nashorn'
+
+      - name: Compile fastdebug mode
+        run: |
+          mv hotspot dragonwell8
+          mv langtools dragonwell8
+          mv jdk dragonwell8
+          mv corba dragonwell8
+          mv jaxp dragonwell8
+          mv jaxws dragonwell8
+          mv nashorn dragonwell8
+          cd dragonwell8
+          sh configure --with-debug-level=fastdebug --with-cacerts-file=${PWD}/common/security/cacerts --with-milestone=fcs --enable-unlimited-crypto
+          make LOG=trace images
+
+      - name: Sanity test
+        run: |
+          cd dragonwell8
+          TEST_JDK_HOME=build/linux-x86_64-normal-server-fastdebug/images/j2sdk-image
+          ${TEST_JDK_HOME}/bin/java -version
+
+          #- name: Tier1 test
+          #run: |
+          #make test TEST="hotspot_tier1 jdk_tier1"
+
   build_slowdebug_jdk:
     runs-on: ubuntu-latest
     container:
diff --git a/src/share/vm/gc_interface/allocTracer.inline.hpp b/src/share/vm/gc_interface/allocTracer.inline.hpp
index 8c37d4966dc24de0eb86f9021a37d9882b06f778..38e112ab316fb2f6b6a12e4fbf4a473947866c0e 100644
--- a/src/share/vm/gc_interface/allocTracer.inline.hpp
+++ b/src/share/vm/gc_interface/allocTracer.inline.hpp
@@ -60,7 +60,7 @@ inline void AllocTracer::send_opto_array_allocation_event(KlassHandle klass, oop
   EventOptoArrayObjectAllocation event;
   if (event.should_commit()) {
     event.set_objectClass(klass());
-    event.set_address((TYPE_ADDRESS)obj);
+    event.set_address(cast_from_oop<TYPE_ADDRESS>(obj));
     event.set_allocationSize(alloc_size);
     event.commit();
   }
@@ -70,7 +70,7 @@ inline void AllocTracer::send_opto_instance_allocation_event(KlassHandle klass,
   EventOptoInstanceObjectAllocation event;
   if (event.should_commit()) {
     event.set_objectClass(klass());
-    event.set_address((TYPE_ADDRESS)obj);
+    event.set_address(cast_from_oop<TYPE_ADDRESS>(obj));
     event.commit();
   }
 }