src/hotspot/share/gc/shenandoah/shenandoah_globals.hpp

@@ -512,10 +512,28 @@
            "Turn on/off load-reference barriers in Shenandoah")              \
                                                                              \
    product(bool, ShenandoahStackWatermarkBarrier, true, DIAGNOSTIC,          \
            "Turn on/off stack watermark barriers in Shenandoah")             \
                                                                              \
+   product(bool, ShenandoahCloneRuntime, false, DIAGNOSTIC,                  \
+           "Handle clone in runtime instead of in copy stubs.")              \
+                                                                             \
+   product(bool, ShenandoahGCStateCheckHotpatch, false, EXPERIMENTAL,        \
+           "DANGEROUS, USE ONLY WITH PASSIVE MODE: Replace GC state checks " \
+           "with hot-patchable sequence in barrier fast-paths. Measures "    \
+           "potential improvement from GC state hot-patching.")              \
+                                                                             \
+   product(bool, ShenandoahGCStateCheckRemove, false, EXPERIMENTAL,          \
+           "DANGEROUS, USE ONLY WITH PASSIVE MODE: Remove GC state checks "  \
+           "in barrier fast-paths. Measures code density impact from GC "    \
+           "state checks.")                                                  \
+                                                                             \
+   product(bool, ShenandoahSkipBarriers, false, EXPERIMENTAL,                \
+           "DANGEROUS, USE ONLY WITH PASSIVE MODE: Skip all barriers after " \
+           "expansion. Measures code density impact from additional code "   \
+           "at both fast- and slow-paths.")                                  \
+                                                                             \
    develop(bool, ShenandoahVerifyOptoBarriers, trueInDebug,                  \
            "Verify no missing barriers in C2.")                              \
                                                                              \
    product(uintx, ShenandoahOldCompactionReserve, 8, EXPERIMENTAL,           \
            "During generational GC, prevent promotions from filling "        \