--- a/hotspot/src/share/vm/gc_implementation/g1/g1CollectedHeap.cpp Fri Nov 28 08:20:52 2014 +0100
+++ b/hotspot/src/share/vm/gc_implementation/g1/g1CollectedHeap.cpp Fri Nov 28 08:53:48 2014 +0000
@@ -2257,6 +2257,7 @@
case GCCause::_java_lang_system_gc: return ExplicitGCInvokesConcurrent;
case GCCause::_g1_humongous_allocation: return true;
case GCCause::_update_allocation_context_stats_inc: return true;
+ case GCCause::_wb_conc_mark: return true;
default: return false;
}
}
--- a/hotspot/src/share/vm/gc_implementation/g1/vm_operations_g1.cpp Fri Nov 28 08:20:52 2014 +0100
+++ b/hotspot/src/share/vm/gc_implementation/g1/vm_operations_g1.cpp Fri Nov 28 08:53:48 2014 +0000
@@ -92,12 +92,8 @@
void VM_G1IncCollectionPause::doit() {
G1CollectedHeap* g1h = G1CollectedHeap::heap();
- assert(!_should_initiate_conc_mark ||
- ((_gc_cause == GCCause::_gc_locker && GCLockerInvokesConcurrent) ||
- (_gc_cause == GCCause::_java_lang_system_gc && ExplicitGCInvokesConcurrent) ||
- _gc_cause == GCCause::_g1_humongous_allocation ||
- _gc_cause == GCCause::_update_allocation_context_stats_inc),
- "only a GC locker, a System.gc(), stats update or a hum allocation induced GC should start a cycle");
+ assert(!_should_initiate_conc_mark || g1h->should_do_concurrent_full_gc(_gc_cause),
+ "only a GC locker, a System.gc(), stats update, whitebox, or a hum allocation induced GC should start a cycle");
if (_word_size > 0) {
// An allocation has been requested. So, try to do that first.
--- a/hotspot/src/share/vm/gc_interface/gcCause.cpp Fri Nov 28 08:20:52 2014 +0100
+++ b/hotspot/src/share/vm/gc_interface/gcCause.cpp Fri Nov 28 08:53:48 2014 +0000
@@ -54,6 +54,9 @@
case _wb_young_gc:
return "WhiteBox Initiated Young GC";
+ case _wb_conc_mark:
+ return "WhiteBox Initiated Concurrent Mark";
+
case _update_allocation_context_stats_inc:
case _update_allocation_context_stats_full:
return "Update Allocation Context Stats";
--- a/hotspot/src/share/vm/gc_interface/gcCause.hpp Fri Nov 28 08:20:52 2014 +0100
+++ b/hotspot/src/share/vm/gc_interface/gcCause.hpp Fri Nov 28 08:53:48 2014 +0000
@@ -47,6 +47,7 @@
_heap_inspection,
_heap_dump,
_wb_young_gc,
+ _wb_conc_mark,
_update_allocation_context_stats_inc,
_update_allocation_context_stats_full,
--- a/hotspot/src/share/vm/prims/whitebox.cpp Fri Nov 28 08:20:52 2014 +0100
+++ b/hotspot/src/share/vm/prims/whitebox.cpp Fri Nov 28 08:53:48 2014 +0000
@@ -49,6 +49,7 @@
#if INCLUDE_ALL_GCS
#include "gc_implementation/parallelScavenge/parallelScavengeHeap.inline.hpp"
#include "gc_implementation/g1/concurrentMark.hpp"
+#include "gc_implementation/g1/concurrentMarkThread.hpp"
#include "gc_implementation/g1/g1CollectedHeap.inline.hpp"
#include "gc_implementation/g1/heapRegionRemSet.hpp"
#endif // INCLUDE_ALL_GCS
@@ -266,8 +267,16 @@
WB_ENTRY(jboolean, WB_G1InConcurrentMark(JNIEnv* env, jobject o))
G1CollectedHeap* g1 = G1CollectedHeap::heap();
- ConcurrentMark* cm = g1->concurrent_mark();
- return cm->concurrent_marking_in_progress();
+ return g1->concurrent_mark()->cmThread()->during_cycle();
+WB_END
+
+WB_ENTRY(jboolean, WB_G1StartMarkCycle(JNIEnv* env, jobject o))
+ G1CollectedHeap* g1h = G1CollectedHeap::heap();
+ if (!g1h->concurrent_mark()->cmThread()->during_cycle()) {
+ g1h->collect(GCCause::_wb_conc_mark);
+ return true;
+ }
+ return false;
WB_END
WB_ENTRY(jint, WB_G1RegionSize(JNIEnv* env, jobject o))
@@ -1106,6 +1115,7 @@
{CC"g1IsHumongous", CC"(Ljava/lang/Object;)Z", (void*)&WB_G1IsHumongous },
{CC"g1NumFreeRegions", CC"()J", (void*)&WB_G1NumFreeRegions },
{CC"g1RegionSize", CC"()I", (void*)&WB_G1RegionSize },
+ {CC"g1StartConcMarkCycle", CC"()Z", (void*)&WB_G1StartMarkCycle },
#endif // INCLUDE_ALL_GCS
#if INCLUDE_NMT
{CC"NMTMalloc", CC"(J)J", (void*)&WB_NMTMalloc },
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/test/gc/whitebox/TestConcMarkCycleWB.java Fri Nov 28 08:53:48 2014 +0000
@@ -0,0 +1,57 @@
+/*
+ * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * @test TestConMarkCycleWB
+ * @bug 8065579
+ * @requires vm.gc=="null" | vm.gc=="G1"
+ * @library /testlibrary /testlibrary/whitebox
+ * @build ClassFileInstaller com.oracle.java.testlibrary.* sun.hotspot.WhiteBox TestConcMarkCycleWB
+ * @run main ClassFileInstaller sun.hotspot.WhiteBox
+ * sun.hotspot.WhiteBox$WhiteBoxPermission
+ * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -XX:+UseG1GC TestConcMarkCycleWB
+ * @summary Verifies that ConcurrentMarking-related WB works properly
+ */
+import static com.oracle.java.testlibrary.Asserts.assertFalse;
+import static com.oracle.java.testlibrary.Asserts.assertTrue;
+import sun.hotspot.WhiteBox;
+
+public class TestConcMarkCycleWB {
+
+ public static void main(String[] args) throws Exception {
+ WhiteBox wb = WhiteBox.getWhiteBox();
+
+ wb.youngGC();
+ assertTrue(wb.g1StartConcMarkCycle());
+ while (wb.g1InConcurrentMark()) {
+ Thread.sleep(5);
+ }
+
+ wb.fullGC();
+ assertTrue(wb.g1StartConcMarkCycle());
+ while (wb.g1InConcurrentMark()) {
+ Thread.sleep(5);
+ }
+ assertTrue(wb.g1StartConcMarkCycle());
+ }
+}
--- a/hotspot/test/testlibrary/whitebox/sun/hotspot/WhiteBox.java Fri Nov 28 08:20:52 2014 +0100
+++ b/hotspot/test/testlibrary/whitebox/sun/hotspot/WhiteBox.java Fri Nov 28 08:53:48 2014 +0000
@@ -162,12 +162,16 @@
public native long incMetaspaceCapacityUntilGC(long increment);
public native long metaspaceCapacityUntilGC();
- // force Young GC
+ // Force Young GC
public native void youngGC();
- // force Full GC
+ // Force Full GC
public native void fullGC();
+ // Method tries to start concurrent mark cycle.
+ // It returns false if CM Thread is always in concurrent cycle.
+ public native boolean g1StartConcMarkCycle();
+
// Tests on ReservedSpace/VirtualSpace classes
public native int stressVirtualSpaceResize(long reservedSpaceSize, long magnitude, long iterations);
public native void runMemoryUnitTests();