--- a/src/hotspot/cpu/s390/globals_s390.hpp Thu Oct 17 20:27:44 2019 +0100
+++ b/src/hotspot/cpu/s390/globals_s390.hpp Thu Oct 17 20:53:35 2019 +0100
@@ -33,9 +33,6 @@
// (see globals.hpp)
// Sorted according to sparc.
-// z/Architecture remembers branch targets, so don't share vtables.
-define_pd_global(bool, ShareVtableStubs, true);
-
define_pd_global(bool, ImplicitNullChecks, true); // Generate code for implicit null checks.
define_pd_global(bool, TrapBasedNullChecks, true);
define_pd_global(bool, UncommonNullCast, true); // Uncommon-trap NULLs passed to check cast.
@@ -54,7 +51,7 @@
#define DEFAULT_STACK_RED_PAGES (1)
// Java_java_net_SocketOutputStream_socketWrite0() uses a 64k buffer on the
// stack. To pass stack overflow tests we need 20 shadow pages.
-#define DEFAULT_STACK_SHADOW_PAGES (20 DEBUG_ONLY(+2))
+#define DEFAULT_STACK_SHADOW_PAGES (20 DEBUG_ONLY(+4))
#define DEFAULT_STACK_RESERVED_PAGES (1)
#define MIN_STACK_YELLOW_PAGES DEFAULT_STACK_YELLOW_PAGES