--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/hotspot/cpu/s390/globals_s390.hpp Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,124 @@
+/*
+ * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2016 SAP SE. 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.
+ *
+ */
+
+#ifndef CPU_S390_VM_GLOBALS_S390_HPP
+#define CPU_S390_VM_GLOBALS_S390_HPP
+
+#include "utilities/globalDefinitions.hpp"
+#include "utilities/macros.hpp"
+
+// Sets the default values for platform dependent flags used by the runtime system.
+// (see globals.hpp)
+// Sorted according to sparc.
+
+// z/Architecture remembers branch targets, so don't share vtables.
+define_pd_global(bool, ShareVtableStubs, false);
+define_pd_global(bool, NeedsDeoptSuspend, false); // Only register window machines need this.
+
+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.
+
+define_pd_global(uintx, CodeCacheSegmentSize, 256);
+// This shall be at least 32 for proper branch target alignment.
+// Ideally, this is 256 (cache line size). This keeps code end data
+// on separate lines. But we reduced it to 64 since 256 increased
+// code size significantly by padding nops between IVC and second UEP.
+define_pd_global(intx, CodeEntryAlignment, 64);
+define_pd_global(intx, OptoLoopAlignment, 2);
+define_pd_global(intx, InlineFrequencyCount, 100);
+define_pd_global(intx, InlineSmallCode, 2000);
+
+#define DEFAULT_STACK_YELLOW_PAGES (2)
+#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_RESERVED_PAGES (1)
+
+#define MIN_STACK_YELLOW_PAGES DEFAULT_STACK_YELLOW_PAGES
+#define MIN_STACK_RED_PAGES DEFAULT_STACK_RED_PAGES
+#define MIN_STACK_SHADOW_PAGES DEFAULT_STACK_SHADOW_PAGES
+#define MIN_STACK_RESERVED_PAGES (0)
+
+define_pd_global(intx, StackYellowPages, DEFAULT_STACK_YELLOW_PAGES);
+define_pd_global(intx, StackRedPages, DEFAULT_STACK_RED_PAGES);
+define_pd_global(intx, StackShadowPages, DEFAULT_STACK_SHADOW_PAGES);
+define_pd_global(intx, StackReservedPages, DEFAULT_STACK_RESERVED_PAGES);
+
+define_pd_global(bool, RewriteBytecodes, true);
+define_pd_global(bool, RewriteFrequentPairs, true);
+
+define_pd_global(bool, UseMembar, false);
+
+define_pd_global(bool, PreserveFramePointer, false);
+
+// GC Ergo Flags
+define_pd_global(size_t, CMSYoungGenPerWorker, 16*M); // Default max size of CMS young gen, per GC worker thread.
+
+define_pd_global(uintx, TypeProfileLevel, 111);
+
+define_pd_global(bool, CompactStrings, true);
+
+// 8146801 (Short Array Allocation): No performance work done here yet.
+define_pd_global(intx, InitArrayShortSize, 1*BytesPerLong);
+
+#define ARCH_FLAGS(develop, product, diagnostic, experimental, notproduct, range, constraint, writeable) \
+ \
+ /* Reoptimize code-sequences of calls at runtime, e.g. replace an */ \
+ /* indirect call by a direct call. */ \
+ product(bool, ReoptimizeCallSequences, true, \
+ "Reoptimize code-sequences of calls at runtime.") \
+ \
+ product(bool, UseByteReverseInstruction, true, \
+ "Use byte reverse instruction.") \
+ \
+ product(bool, ExpandLoadingBaseDecode, true, "Expand the assembler " \
+ "instruction required to load the base from DecodeN nodes during " \
+ "matching.") \
+ product(bool, ExpandLoadingBaseDecode_NN, true, "Expand the assembler " \
+ "instruction required to load the base from DecodeN_NN nodes " \
+ "during matching.") \
+ product(bool, ExpandLoadingBaseEncode, true, "Expand the assembler " \
+ "instruction required to load the base from EncodeP nodes during " \
+ "matching.") \
+ product(bool, ExpandLoadingBaseEncode_NN, true, "Expand the assembler " \
+ "instruction required to load the base from EncodeP_NN nodes " \
+ "during matching.") \
+ \
+ /* Seems to pay off with 2 pages already. */ \
+ product(size_t, MVCLEThreshold, +2*(4*K), \
+ "Threshold above which page-aligned MVCLE copy/init is used.") \
+ \
+ product(bool, PreferLAoverADD, false, \
+ "Use LA/LAY instructions over ADD instructions (z/Architecture).") \
+ \
+ develop(bool, ZapEmptyStackFields, false, "Write 0x0101... to empty stack" \
+ " fields. Use this to ease stack debugging.") \
+ \
+ product(bool, TraceTraps, false, "Trace all traps the signal handler" \
+ "handles.")
+
+#endif // CPU_S390_VM_GLOBALS_S390_HPP