commit 8d979406d9932d7e19a779bc78ecec723aff5e3e
author Roman Kennke <rkennke@openjdk.org> Tue Feb 16 08:17:32 2021 +0000
committer Roman Kennke <rkennke@openjdk.org> Tue Feb 16 08:17:32 2021 +0000
tree ab99bf09cbc26907f7db97c9f01cf62c7e20e57b
parent e6b5d61562cdb4a08fe46b3fb59ee3967bae159d

8261413: Shenandoah: Disable class-unloading in I-U mode

Reviewed-by: shade, zgu

src/hotspot/share/gc/shenandoah/mode/shenandoahIUMode.cpp

diff --git a/src/hotspot/share/gc/shenandoah/mode/shenandoahIUMode.cpp b/src/hotspot/share/gc/shenandoah/mode/shenandoahIUMode.cpp
index 013a0a6..8c84616 100644
--- a/src/hotspot/share/gc/shenandoah/mode/shenandoahIUMode.cpp
+++ b/src/hotspot/share/gc/shenandoah/mode/shenandoahIUMode.cpp
@@ -32,6 +32,11 @@
 #include "logging/logTag.hpp"
 
 void ShenandoahIUMode::initialize_flags() const {
+  if (FLAG_IS_CMDLINE(ClassUnloadingWithConcurrentMark) && ClassUnloading) {
+    log_warning(gc)("Shenandoah I-U mode sets -XX:-ClassUnloadingWithConcurrentMark; see JDK-8261341 for details");
+  }
+  FLAG_SET_DEFAULT(ClassUnloadingWithConcurrentMark, false);
+
   if (FLAG_IS_DEFAULT(ShenandoahIUBarrier)) {
     FLAG_SET_DEFAULT(ShenandoahIUBarrier, true);
   }