Merge

hotspot/test/gc/g1/humongousObjects/objectGraphTest/GC.java

@@ -38,6 +38,61 @@ import java.util.function.Consumer;
  * referenced objects after GCs
  */
 public enum GC {
+    CMC {
+        @Override
+        public Runnable get() {
+            return () -> {
+                Helpers.waitTillCMCFinished(WHITE_BOX, 0);
+                WHITE_BOX.g1StartConcMarkCycle();
+                Helpers.waitTillCMCFinished(WHITE_BOX, 0);
+            };
+        }
+
+        public Consumer<ReferenceInfo<Object[]>> getChecker() {
+            return getCheckerImpl(false, false, true, false);
+        }
+
+        @Override
+        public List<String> shouldContain() {
+            return Arrays.asList(GCTokens.WB_INITIATED_CMC);
+        }
+
+        @Override
+        public List<String> shouldNotContain() {
+            return Arrays.asList(GCTokens.WB_INITIATED_YOUNG_GC, GCTokens.WB_INITIATED_MIXED_GC,
+                    GCTokens.FULL_GC, GCTokens.YOUNG_GC);
+        }
+    },
+
+    CMC_NO_SURV_ROOTS {
+        @Override
+        public Runnable get() {
+            return () -> {
+                WHITE_BOX.youngGC();
+                Helpers.waitTillCMCFinished(WHITE_BOX, 0);
+                WHITE_BOX.youngGC();
+                Helpers.waitTillCMCFinished(WHITE_BOX, 0);
+
+                WHITE_BOX.g1StartConcMarkCycle();
+                Helpers.waitTillCMCFinished(WHITE_BOX, 0);
+            };
+        }
+
+        public Consumer<ReferenceInfo<Object[]>> getChecker() {
+            return getCheckerImpl(true, false, true, false);
+        }
+
+        @Override
+        public List<String> shouldContain() {
+            return Arrays.asList(GCTokens.WB_INITIATED_CMC);
+        }
+
+        @Override
+        public List<String> shouldNotContain() {
+            return Arrays.asList(GCTokens.WB_INITIATED_MIXED_GC,
+                    GCTokens.FULL_GC, GCTokens.YOUNG_GC);
+        }
+    },
 
     YOUNG_GC {
         @Override
@@ -60,6 +115,7 @@ public enum GC {
                     GCTokens.CMC, GCTokens.YOUNG_GC);
         }
     },
+
     FULL_GC {
         @Override
         public Runnable get() {

hotspot/test/gc/g1/humongousObjects/objectGraphTest/README

@@ -31,6 +31,13 @@ The test checks that after different type of GC unreachable objects behave as ex
 
 3. Full GC with memory pressure - weakly and softly referenced non-humongous and humongous objects are collected.
 
+4. CMC -  weakly referenced non-humongous objects are collected, other objects are not collected since weak references
+          from Young Gen is handled as strong during CMC.
+
+5. CMC_NO_SURV_ROOTS -  weakly referenced non-humongous and humongous objects are collected, softly referenced
+                        non-humongous and humongous objects are not collected since we make 2 Young GC to promote all
+                        weak references to Old Gen.
+
 The test gets gc type as a command line argument.
 Then the test allocates object graph in heap (currently testing scenarios are pre-generated and stored in
 TestcaseData.getPregeneratedTestcases()) with TestObjectGraphAfterGC::allocateObjectGraph.

hotspot/test/gc/g1/humongousObjects/objectGraphTest/TestObjectGraphAfterGC.java

@@ -77,6 +77,14 @@ import java.util.stream.Collectors;
  * -XX:G1HeapRegionSize=1M -Xlog:gc=info:file=TestObjectGraphAfterGC_FULL_GC_MEMORY_PRESSURE.gc.log
  * gc.g1.humongousObjects.objectGraphTest.TestObjectGraphAfterGC FULL_GC_MEMORY_PRESSURE
  *
+ * @run main/othervm -Xms200M -XX:+UseG1GC -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -Xbootclasspath/a:.
+ * -XX:G1HeapRegionSize=1M -Xlog:gc=info:file=TestObjectGraphAfterGC_CMC.gc.log -XX:MaxTenuringThreshold=16
+ * gc.g1.humongousObjects.objectGraphTest.TestObjectGraphAfterGC CMC
+ *
+ * @run main/othervm -Xms200M -XX:+UseG1GC -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -Xbootclasspath/a:.
+ * -XX:G1HeapRegionSize=1M -Xlog:gc=info:file=TestObjectGraphAfterGC_CMC_NO_SURV_ROOTS.gc.log -XX:MaxTenuringThreshold=1
+ * gc.g1.humongousObjects.objectGraphTest.TestObjectGraphAfterGC CMC_NO_SURV_ROOTS
+ *
  */
 
 /**