changeset 57765:4b436b5d1630

8230307: ZGC: Make zGlobals and zArguments OS agnostic Reviewed-by: pliden, smonteith
author eosterlund
date Fri, 30 Aug 2019 10:44:06 +0200
parents 421cc7c347cf
children ed7eb20871c5
files src/hotspot/cpu/aarch64/gc/z/zArguments_aarch64.cpp src/hotspot/cpu/aarch64/gc/z/zGlobals_aarch64.cpp src/hotspot/cpu/aarch64/gc/z/zGlobals_aarch64.hpp src/hotspot/cpu/x86/gc/z/zArguments_x86.cpp src/hotspot/cpu/x86/gc/z/zGlobals_x86.cpp src/hotspot/cpu/x86/gc/z/zGlobals_x86.hpp src/hotspot/os_cpu/linux_aarch64/gc/z/zArguments_linux_aarch64.cpp src/hotspot/os_cpu/linux_aarch64/gc/z/zGlobals_linux_aarch64.cpp src/hotspot/os_cpu/linux_aarch64/gc/z/zGlobals_linux_aarch64.hpp src/hotspot/os_cpu/linux_x86/gc/z/zArguments_linux_x86.cpp src/hotspot/os_cpu/linux_x86/gc/z/zGlobals_linux_x86.cpp src/hotspot/os_cpu/linux_x86/gc/z/zGlobals_linux_x86.hpp src/hotspot/share/gc/z/zGlobals.hpp
diffstat 13 files changed, 525 insertions(+), 525 deletions(-) [+]
line wrap: on
line diff
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/hotspot/cpu/aarch64/gc/z/zArguments_aarch64.cpp	Fri Aug 30 10:44:06 2019 +0200
@@ -0,0 +1,34 @@
+/*
+ * Copyright (c) 2018, 2019, 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.
+ */
+
+#include "precompiled.hpp"
+#include "gc/z/zArguments.hpp"
+#include "runtime/globals.hpp"
+#include "runtime/globals_extension.hpp"
+#include "utilities/debug.hpp"
+
+void ZArguments::initialize_platform() {
+  // Disable class unloading - we don't support concurrent class unloading yet.
+  FLAG_SET_DEFAULT(ClassUnloading, false);
+  FLAG_SET_DEFAULT(ClassUnloadingWithConcurrentMark, false);
+}
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/hotspot/cpu/aarch64/gc/z/zGlobals_aarch64.cpp	Fri Aug 30 10:44:06 2019 +0200
@@ -0,0 +1,173 @@
+/*
+ * Copyright (c) 2017, 2019, 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.
+ */
+
+#include "precompiled.hpp"
+#include "gc/z/zGlobals.hpp"
+#include "gc/z/zUtils.inline.hpp"
+#include "runtime/globals.hpp"
+#include "utilities/globalDefinitions.hpp"
+
+//
+// The heap can have three different layouts, depending on the max heap size.
+//
+// Address Space & Pointer Layout 1
+// --------------------------------
+//
+//  +--------------------------------+ 0x00007FFFFFFFFFFF (127TB)
+//  .                                .
+//  .                                .
+//  .                                .
+//  +--------------------------------+ 0x0000014000000000 (20TB)
+//  |         Remapped View          |
+//  +--------------------------------+ 0x0000010000000000 (16TB)
+//  |     (Reserved, but unused)     |
+//  +--------------------------------+ 0x00000c0000000000 (12TB)
+//  |         Marked1 View           |
+//  +--------------------------------+ 0x0000080000000000 (8TB)
+//  |         Marked0 View           |
+//  +--------------------------------+ 0x0000040000000000 (4TB)
+//  .                                .
+//  +--------------------------------+ 0x0000000000000000
+//
+//   6                  4 4  4 4
+//   3                  6 5  2 1                                             0
+//  +--------------------+----+-----------------------------------------------+
+//  |00000000 00000000 00|1111|11 11111111 11111111 11111111 11111111 11111111|
+//  +--------------------+----+-----------------------------------------------+
+//  |                    |    |
+//  |                    |    * 41-0 Object Offset (42-bits, 4TB address space)
+//  |                    |
+//  |                    * 45-42 Metadata Bits (4-bits)  0001 = Marked0      (Address view 4-8TB)
+//  |                                                    0010 = Marked1      (Address view 8-12TB)
+//  |                                                    0100 = Remapped     (Address view 16-20TB)
+//  |                                                    1000 = Finalizable  (Address view N/A)
+//  |
+//  * 63-46 Fixed (18-bits, always zero)
+//
+//
+// Address Space & Pointer Layout 2
+// --------------------------------
+//
+//  +--------------------------------+ 0x00007FFFFFFFFFFF (127TB)
+//  .                                .
+//  .                                .
+//  .                                .
+//  +--------------------------------+ 0x0000280000000000 (40TB)
+//  |         Remapped View          |
+//  +--------------------------------+ 0x0000200000000000 (32TB)
+//  |     (Reserved, but unused)     |
+//  +--------------------------------+ 0x0000180000000000 (24TB)
+//  |         Marked1 View           |
+//  +--------------------------------+ 0x0000100000000000 (16TB)
+//  |         Marked0 View           |
+//  +--------------------------------+ 0x0000080000000000 (8TB)
+//  .                                .
+//  +--------------------------------+ 0x0000000000000000
+//
+//   6                 4 4  4 4
+//   3                 7 6  3 2                                              0
+//  +------------------+-----+------------------------------------------------+
+//  |00000000 00000000 0|1111|111 11111111 11111111 11111111 11111111 11111111|
+//  +-------------------+----+------------------------------------------------+
+//  |                   |    |
+//  |                   |    * 42-0 Object Offset (43-bits, 8TB address space)
+//  |                   |
+//  |                   * 46-43 Metadata Bits (4-bits)  0001 = Marked0      (Address view 8-16TB)
+//  |                                                   0010 = Marked1      (Address view 16-24TB)
+//  |                                                   0100 = Remapped     (Address view 32-40TB)
+//  |                                                   1000 = Finalizable  (Address view N/A)
+//  |
+//  * 63-47 Fixed (17-bits, always zero)
+//
+//
+// Address Space & Pointer Layout 3
+// --------------------------------
+//
+//  +--------------------------------+ 0x00007FFFFFFFFFFF (127TB)
+//  .                                .
+//  .                                .
+//  .                                .
+//  +--------------------------------+ 0x0000500000000000 (80TB)
+//  |         Remapped View          |
+//  +--------------------------------+ 0x0000400000000000 (64TB)
+//  |     (Reserved, but unused)     |
+//  +--------------------------------+ 0x0000300000000000 (48TB)
+//  |         Marked1 View           |
+//  +--------------------------------+ 0x0000200000000000 (32TB)
+//  |         Marked0 View           |
+//  +--------------------------------+ 0x0000100000000000 (16TB)
+//  .                                .
+//  +--------------------------------+ 0x0000000000000000
+//
+//   6               4  4  4 4
+//   3               8  7  4 3                                               0
+//  +------------------+----+-------------------------------------------------+
+//  |00000000 00000000 |1111|1111 11111111 11111111 11111111 11111111 11111111|
+//  +------------------+----+-------------------------------------------------+
+//  |                  |    |
+//  |                  |    * 43-0 Object Offset (44-bits, 16TB address space)
+//  |                  |
+//  |                  * 47-44 Metadata Bits (4-bits)  0001 = Marked0      (Address view 16-32TB)
+//  |                                                  0010 = Marked1      (Address view 32-48TB)
+//  |                                                  0100 = Remapped     (Address view 64-80TB)
+//  |                                                  1000 = Finalizable  (Address view N/A)
+//  |
+//  * 63-48 Fixed (16-bits, always zero)
+//
+
+uintptr_t ZPlatformAddressSpaceStart() {
+  const uintptr_t first_heap_view_address = (uintptr_t)1 << (ZPlatformAddressMetadataShift() + 0);
+  const size_t min_address_offset = 0;
+  return first_heap_view_address + min_address_offset;
+}
+
+uintptr_t ZPlatformAddressSpaceEnd() {
+  const uintptr_t last_heap_view_address = (uintptr_t)1 << (ZPlatformAddressMetadataShift() + 2);
+  const size_t max_address_offset = (size_t)1 << ZPlatformAddressOffsetBits();
+  return last_heap_view_address + max_address_offset;
+}
+
+uintptr_t ZPlatformAddressReservedStart() {
+  return ZPlatformAddressSpaceStart();
+}
+
+uintptr_t ZPlatformAddressReservedEnd() {
+  return ZPlatformAddressSpaceEnd();
+}
+
+uintptr_t ZPlatformAddressBase() {
+  return 0;
+}
+
+size_t ZPlatformAddressOffsetBits() {
+  const size_t min_address_offset_bits = 42; // 4TB
+  const size_t max_address_offset_bits = 44; // 16TB
+  const size_t virtual_to_physical_ratio = 7; // 7:1
+  const size_t address_offset = ZUtils::round_up_power_of_2(MaxHeapSize * virtual_to_physical_ratio);
+  const size_t address_offset_bits = log2_intptr(address_offset);
+  return MIN2(MAX2(address_offset_bits, min_address_offset_bits), max_address_offset_bits);
+}
+
+size_t ZPlatformAddressMetadataShift() {
+  return ZPlatformAddressOffsetBits();
+}
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/hotspot/cpu/aarch64/gc/z/zGlobals_aarch64.hpp	Fri Aug 30 10:44:06 2019 +0200
@@ -0,0 +1,51 @@
+/*
+ * Copyright (c) 2015, 2019, 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.
+ */
+
+#ifndef CPU_AARCH64_GC_Z_ZGLOBALS_AARCH64_HPP
+#define CPU_AARCH64_GC_Z_ZGLOBALS_AARCH64_HPP
+
+//
+// Page Allocation Tiers
+// ---------------------
+//
+//  Page Type     Page Size     Object Size Limit     Object Alignment
+//  ------------------------------------------------------------------
+//  Small         2M            <= 265K               <MinObjAlignmentInBytes>
+//  Medium        32M           <= 4M                 4K
+//  Large         X*M           > 4M                  2M
+//  ------------------------------------------------------------------
+//
+const size_t ZPlatformGranuleSizeShift      = 21; // 2MB
+const size_t ZPlatformMaxHeapSizeShift      = 46; // 16TB
+const size_t ZPlatformNMethodDisarmedOffset = 4;
+const size_t ZPlatformCacheLineSize         = 64;
+
+uintptr_t    ZPlatformAddressSpaceStart();
+uintptr_t    ZPlatformAddressSpaceEnd();
+uintptr_t    ZPlatformAddressReservedStart();
+uintptr_t    ZPlatformAddressReservedEnd();
+uintptr_t    ZPlatformAddressBase();
+size_t       ZPlatformAddressOffsetBits();
+size_t       ZPlatformAddressMetadataShift();
+
+#endif // CPU_AARCH64_GC_Z_ZGLOBALS_AARCH64_HPP
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/hotspot/cpu/x86/gc/z/zArguments_x86.cpp	Fri Aug 30 10:44:06 2019 +0200
@@ -0,0 +1,42 @@
+/*
+ * Copyright (c) 2018, 2019, 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.
+ */
+
+#include "precompiled.hpp"
+#include "gc/z/zArguments.hpp"
+#include "runtime/globals.hpp"
+#include "runtime/globals_extension.hpp"
+#include "utilities/debug.hpp"
+
+void ZArguments::initialize_platform() {
+#ifdef COMPILER2
+  // The C2 barrier slow path expects vector registers to be least
+  // 16 bytes wide, which is the minimum width available on all
+  // x86-64 systems. However, the user could have speficied a lower
+  // number on the command-line, in which case we print a warning
+  // and raise it to 16.
+  if (MaxVectorSize < 16) {
+    warning("ZGC requires MaxVectorSize to be at least 16");
+    FLAG_SET_DEFAULT(MaxVectorSize, 16);
+  }
+#endif
+}
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/hotspot/cpu/x86/gc/z/zGlobals_x86.cpp	Fri Aug 30 10:44:06 2019 +0200
@@ -0,0 +1,173 @@
+/*
+ * Copyright (c) 2017, 2019, 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.
+ */
+
+#include "precompiled.hpp"
+#include "gc/z/zGlobals.hpp"
+#include "gc/z/zUtils.inline.hpp"
+#include "runtime/globals.hpp"
+#include "utilities/globalDefinitions.hpp"
+
+//
+// The heap can have three different layouts, depending on the max heap size.
+//
+// Address Space & Pointer Layout 1
+// --------------------------------
+//
+//  +--------------------------------+ 0x00007FFFFFFFFFFF (127TB)
+//  .                                .
+//  .                                .
+//  .                                .
+//  +--------------------------------+ 0x0000014000000000 (20TB)
+//  |         Remapped View          |
+//  +--------------------------------+ 0x0000010000000000 (16TB)
+//  |     (Reserved, but unused)     |
+//  +--------------------------------+ 0x00000c0000000000 (12TB)
+//  |         Marked1 View           |
+//  +--------------------------------+ 0x0000080000000000 (8TB)
+//  |         Marked0 View           |
+//  +--------------------------------+ 0x0000040000000000 (4TB)
+//  .                                .
+//  +--------------------------------+ 0x0000000000000000
+//
+//   6                  4 4  4 4
+//   3                  6 5  2 1                                             0
+//  +--------------------+----+-----------------------------------------------+
+//  |00000000 00000000 00|1111|11 11111111 11111111 11111111 11111111 11111111|
+//  +--------------------+----+-----------------------------------------------+
+//  |                    |    |
+//  |                    |    * 41-0 Object Offset (42-bits, 4TB address space)
+//  |                    |
+//  |                    * 45-42 Metadata Bits (4-bits)  0001 = Marked0      (Address view 4-8TB)
+//  |                                                    0010 = Marked1      (Address view 8-12TB)
+//  |                                                    0100 = Remapped     (Address view 16-20TB)
+//  |                                                    1000 = Finalizable  (Address view N/A)
+//  |
+//  * 63-46 Fixed (18-bits, always zero)
+//
+//
+// Address Space & Pointer Layout 2
+// --------------------------------
+//
+//  +--------------------------------+ 0x00007FFFFFFFFFFF (127TB)
+//  .                                .
+//  .                                .
+//  .                                .
+//  +--------------------------------+ 0x0000280000000000 (40TB)
+//  |         Remapped View          |
+//  +--------------------------------+ 0x0000200000000000 (32TB)
+//  |     (Reserved, but unused)     |
+//  +--------------------------------+ 0x0000180000000000 (24TB)
+//  |         Marked1 View           |
+//  +--------------------------------+ 0x0000100000000000 (16TB)
+//  |         Marked0 View           |
+//  +--------------------------------+ 0x0000080000000000 (8TB)
+//  .                                .
+//  +--------------------------------+ 0x0000000000000000
+//
+//   6                 4 4  4 4
+//   3                 7 6  3 2                                              0
+//  +------------------+-----+------------------------------------------------+
+//  |00000000 00000000 0|1111|111 11111111 11111111 11111111 11111111 11111111|
+//  +-------------------+----+------------------------------------------------+
+//  |                   |    |
+//  |                   |    * 42-0 Object Offset (43-bits, 8TB address space)
+//  |                   |
+//  |                   * 46-43 Metadata Bits (4-bits)  0001 = Marked0      (Address view 8-16TB)
+//  |                                                   0010 = Marked1      (Address view 16-24TB)
+//  |                                                   0100 = Remapped     (Address view 32-40TB)
+//  |                                                   1000 = Finalizable  (Address view N/A)
+//  |
+//  * 63-47 Fixed (17-bits, always zero)
+//
+//
+// Address Space & Pointer Layout 3
+// --------------------------------
+//
+//  +--------------------------------+ 0x00007FFFFFFFFFFF (127TB)
+//  .                                .
+//  .                                .
+//  .                                .
+//  +--------------------------------+ 0x0000500000000000 (80TB)
+//  |         Remapped View          |
+//  +--------------------------------+ 0x0000400000000000 (64TB)
+//  |     (Reserved, but unused)     |
+//  +--------------------------------+ 0x0000300000000000 (48TB)
+//  |         Marked1 View           |
+//  +--------------------------------+ 0x0000200000000000 (32TB)
+//  |         Marked0 View           |
+//  +--------------------------------+ 0x0000100000000000 (16TB)
+//  .                                .
+//  +--------------------------------+ 0x0000000000000000
+//
+//   6               4  4  4 4
+//   3               8  7  4 3                                               0
+//  +------------------+----+-------------------------------------------------+
+//  |00000000 00000000 |1111|1111 11111111 11111111 11111111 11111111 11111111|
+//  +------------------+----+-------------------------------------------------+
+//  |                  |    |
+//  |                  |    * 43-0 Object Offset (44-bits, 16TB address space)
+//  |                  |
+//  |                  * 47-44 Metadata Bits (4-bits)  0001 = Marked0      (Address view 16-32TB)
+//  |                                                  0010 = Marked1      (Address view 32-48TB)
+//  |                                                  0100 = Remapped     (Address view 64-80TB)
+//  |                                                  1000 = Finalizable  (Address view N/A)
+//  |
+//  * 63-48 Fixed (16-bits, always zero)
+//
+
+uintptr_t ZPlatformAddressSpaceStart() {
+  const uintptr_t first_heap_view_address = (uintptr_t)1 << (ZPlatformAddressMetadataShift() + 0);
+  const size_t min_address_offset = 0;
+  return first_heap_view_address + min_address_offset;
+}
+
+uintptr_t ZPlatformAddressSpaceEnd() {
+  const uintptr_t last_heap_view_address = (uintptr_t)1 << (ZPlatformAddressMetadataShift() + 2);
+  const size_t max_address_offset = (size_t)1 << ZPlatformAddressOffsetBits();
+  return last_heap_view_address + max_address_offset;
+}
+
+uintptr_t ZPlatformAddressReservedStart() {
+  return ZPlatformAddressSpaceStart();
+}
+
+uintptr_t ZPlatformAddressReservedEnd() {
+  return ZPlatformAddressSpaceEnd();
+}
+
+uintptr_t ZPlatformAddressBase() {
+  return 0;
+}
+
+size_t ZPlatformAddressOffsetBits() {
+  const size_t min_address_offset_bits = 42; // 4TB
+  const size_t max_address_offset_bits = 44; // 16TB
+  const size_t virtual_to_physical_ratio = 7; // 7:1
+  const size_t address_offset = ZUtils::round_up_power_of_2(MaxHeapSize * virtual_to_physical_ratio);
+  const size_t address_offset_bits = log2_intptr(address_offset);
+  return MIN2(MAX2(address_offset_bits, min_address_offset_bits), max_address_offset_bits);
+}
+
+size_t ZPlatformAddressMetadataShift() {
+  return ZPlatformAddressOffsetBits();
+}
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/hotspot/cpu/x86/gc/z/zGlobals_x86.hpp	Fri Aug 30 10:44:06 2019 +0200
@@ -0,0 +1,51 @@
+/*
+ * Copyright (c) 2015, 2019, 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.
+ */
+
+#ifndef CPU_X86_GC_Z_ZGLOBALS_X86_HPP
+#define CPU_X86_GC_Z_ZGLOBALS_X86_HPP
+
+//
+// Page Allocation Tiers
+// ---------------------
+//
+//  Page Type     Page Size     Object Size Limit     Object Alignment
+//  ------------------------------------------------------------------
+//  Small         2M            <= 265K               <MinObjAlignmentInBytes>
+//  Medium        32M           <= 4M                 4K
+//  Large         X*M           > 4M                  2M
+//  ------------------------------------------------------------------
+//
+const size_t ZPlatformGranuleSizeShift      = 21; // 2MB
+const size_t ZPlatformMaxHeapSizeShift      = 46; // 16TB
+const size_t ZPlatformNMethodDisarmedOffset = 4;
+const size_t ZPlatformCacheLineSize         = 64;
+
+uintptr_t    ZPlatformAddressSpaceStart();
+uintptr_t    ZPlatformAddressSpaceEnd();
+uintptr_t    ZPlatformAddressReservedStart();
+uintptr_t    ZPlatformAddressReservedEnd();
+uintptr_t    ZPlatformAddressBase();
+size_t       ZPlatformAddressOffsetBits();
+size_t       ZPlatformAddressMetadataShift();
+
+#endif // CPU_X86_GC_Z_ZGLOBALS_X86_HPP
--- a/src/hotspot/os_cpu/linux_aarch64/gc/z/zArguments_linux_aarch64.cpp	Fri Aug 30 11:11:33 2019 +0200
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,34 +0,0 @@
-/*
- * Copyright (c) 2018, 2019, 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.
- */
-
-#include "precompiled.hpp"
-#include "gc/z/zArguments.hpp"
-#include "runtime/globals.hpp"
-#include "runtime/globals_extension.hpp"
-#include "utilities/debug.hpp"
-
-void ZArguments::initialize_platform() {
-  // Disable class unloading - we don't support concurrent class unloading yet.
-  FLAG_SET_DEFAULT(ClassUnloading, false);
-  FLAG_SET_DEFAULT(ClassUnloadingWithConcurrentMark, false);
-}
--- a/src/hotspot/os_cpu/linux_aarch64/gc/z/zGlobals_linux_aarch64.cpp	Fri Aug 30 11:11:33 2019 +0200
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,173 +0,0 @@
-/*
- * Copyright (c) 2017, 2019, 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.
- */
-
-#include "precompiled.hpp"
-#include "gc/z/zGlobals.hpp"
-#include "gc/z/zUtils.inline.hpp"
-#include "runtime/globals.hpp"
-#include "utilities/globalDefinitions.hpp"
-
-//
-// The heap can have three different layouts, depending on the max heap size.
-//
-// Address Space & Pointer Layout 1
-// --------------------------------
-//
-//  +--------------------------------+ 0x00007FFFFFFFFFFF (127TB)
-//  .                                .
-//  .                                .
-//  .                                .
-//  +--------------------------------+ 0x0000014000000000 (20TB)
-//  |         Remapped View          |
-//  +--------------------------------+ 0x0000010000000000 (16TB)
-//  |     (Reserved, but unused)     |
-//  +--------------------------------+ 0x00000c0000000000 (12TB)
-//  |         Marked1 View           |
-//  +--------------------------------+ 0x0000080000000000 (8TB)
-//  |         Marked0 View           |
-//  +--------------------------------+ 0x0000040000000000 (4TB)
-//  .                                .
-//  +--------------------------------+ 0x0000000000000000
-//
-//   6                  4 4  4 4
-//   3                  6 5  2 1                                             0
-//  +--------------------+----+-----------------------------------------------+
-//  |00000000 00000000 00|1111|11 11111111 11111111 11111111 11111111 11111111|
-//  +--------------------+----+-----------------------------------------------+
-//  |                    |    |
-//  |                    |    * 41-0 Object Offset (42-bits, 4TB address space)
-//  |                    |
-//  |                    * 45-42 Metadata Bits (4-bits)  0001 = Marked0      (Address view 4-8TB)
-//  |                                                    0010 = Marked1      (Address view 8-12TB)
-//  |                                                    0100 = Remapped     (Address view 16-20TB)
-//  |                                                    1000 = Finalizable  (Address view N/A)
-//  |
-//  * 63-46 Fixed (18-bits, always zero)
-//
-//
-// Address Space & Pointer Layout 2
-// --------------------------------
-//
-//  +--------------------------------+ 0x00007FFFFFFFFFFF (127TB)
-//  .                                .
-//  .                                .
-//  .                                .
-//  +--------------------------------+ 0x0000280000000000 (40TB)
-//  |         Remapped View          |
-//  +--------------------------------+ 0x0000200000000000 (32TB)
-//  |     (Reserved, but unused)     |
-//  +--------------------------------+ 0x0000180000000000 (24TB)
-//  |         Marked1 View           |
-//  +--------------------------------+ 0x0000100000000000 (16TB)
-//  |         Marked0 View           |
-//  +--------------------------------+ 0x0000080000000000 (8TB)
-//  .                                .
-//  +--------------------------------+ 0x0000000000000000
-//
-//   6                 4 4  4 4
-//   3                 7 6  3 2                                              0
-//  +------------------+-----+------------------------------------------------+
-//  |00000000 00000000 0|1111|111 11111111 11111111 11111111 11111111 11111111|
-//  +-------------------+----+------------------------------------------------+
-//  |                   |    |
-//  |                   |    * 42-0 Object Offset (43-bits, 8TB address space)
-//  |                   |
-//  |                   * 46-43 Metadata Bits (4-bits)  0001 = Marked0      (Address view 8-16TB)
-//  |                                                   0010 = Marked1      (Address view 16-24TB)
-//  |                                                   0100 = Remapped     (Address view 32-40TB)
-//  |                                                   1000 = Finalizable  (Address view N/A)
-//  |
-//  * 63-47 Fixed (17-bits, always zero)
-//
-//
-// Address Space & Pointer Layout 3
-// --------------------------------
-//
-//  +--------------------------------+ 0x00007FFFFFFFFFFF (127TB)
-//  .                                .
-//  .                                .
-//  .                                .
-//  +--------------------------------+ 0x0000500000000000 (80TB)
-//  |         Remapped View          |
-//  +--------------------------------+ 0x0000400000000000 (64TB)
-//  |     (Reserved, but unused)     |
-//  +--------------------------------+ 0x0000300000000000 (48TB)
-//  |         Marked1 View           |
-//  +--------------------------------+ 0x0000200000000000 (32TB)
-//  |         Marked0 View           |
-//  +--------------------------------+ 0x0000100000000000 (16TB)
-//  .                                .
-//  +--------------------------------+ 0x0000000000000000
-//
-//   6               4  4  4 4
-//   3               8  7  4 3                                               0
-//  +------------------+----+-------------------------------------------------+
-//  |00000000 00000000 |1111|1111 11111111 11111111 11111111 11111111 11111111|
-//  +------------------+----+-------------------------------------------------+
-//  |                  |    |
-//  |                  |    * 43-0 Object Offset (44-bits, 16TB address space)
-//  |                  |
-//  |                  * 47-44 Metadata Bits (4-bits)  0001 = Marked0      (Address view 16-32TB)
-//  |                                                  0010 = Marked1      (Address view 32-48TB)
-//  |                                                  0100 = Remapped     (Address view 64-80TB)
-//  |                                                  1000 = Finalizable  (Address view N/A)
-//  |
-//  * 63-48 Fixed (16-bits, always zero)
-//
-
-uintptr_t ZPlatformAddressSpaceStart() {
-  const uintptr_t first_heap_view_address = (uintptr_t)1 << (ZPlatformAddressMetadataShift() + 0);
-  const size_t min_address_offset = 0;
-  return first_heap_view_address + min_address_offset;
-}
-
-uintptr_t ZPlatformAddressSpaceEnd() {
-  const uintptr_t last_heap_view_address = (uintptr_t)1 << (ZPlatformAddressMetadataShift() + 2);
-  const size_t max_address_offset = (size_t)1 << ZPlatformAddressOffsetBits();
-  return last_heap_view_address + max_address_offset;
-}
-
-uintptr_t ZPlatformAddressReservedStart() {
-  return ZPlatformAddressSpaceStart();
-}
-
-uintptr_t ZPlatformAddressReservedEnd() {
-  return ZPlatformAddressSpaceEnd();
-}
-
-uintptr_t ZPlatformAddressBase() {
-  return 0;
-}
-
-size_t ZPlatformAddressOffsetBits() {
-  const size_t min_address_offset_bits = 42; // 4TB
-  const size_t max_address_offset_bits = 44; // 16TB
-  const size_t virtual_to_physical_ratio = 7; // 7:1
-  const size_t address_offset = ZUtils::round_up_power_of_2(MaxHeapSize * virtual_to_physical_ratio);
-  const size_t address_offset_bits = log2_intptr(address_offset);
-  return MIN2(MAX2(address_offset_bits, min_address_offset_bits), max_address_offset_bits);
-}
-
-size_t ZPlatformAddressMetadataShift() {
-  return ZPlatformAddressOffsetBits();
-}
--- a/src/hotspot/os_cpu/linux_aarch64/gc/z/zGlobals_linux_aarch64.hpp	Fri Aug 30 11:11:33 2019 +0200
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,51 +0,0 @@
-/*
- * Copyright (c) 2015, 2019, 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.
- */
-
-#ifndef OS_CPU_LINUX_AARCH64_GC_Z_ZGLOBALS_LINUX_AARCH64_HPP
-#define OS_CPU_LINUX_AARCH64_GC_Z_ZGLOBALS_LINUX_AARCH64_HPP
-
-//
-// Page Allocation Tiers
-// ---------------------
-//
-//  Page Type     Page Size     Object Size Limit     Object Alignment
-//  ------------------------------------------------------------------
-//  Small         2M            <= 265K               <MinObjAlignmentInBytes>
-//  Medium        32M           <= 4M                 4K
-//  Large         X*M           > 4M                  2M
-//  ------------------------------------------------------------------
-//
-const size_t ZPlatformGranuleSizeShift      = 21; // 2MB
-const size_t ZPlatformMaxHeapSizeShift      = 46; // 16TB
-const size_t ZPlatformNMethodDisarmedOffset = 4;
-const size_t ZPlatformCacheLineSize         = 64;
-
-uintptr_t    ZPlatformAddressSpaceStart();
-uintptr_t    ZPlatformAddressSpaceEnd();
-uintptr_t    ZPlatformAddressReservedStart();
-uintptr_t    ZPlatformAddressReservedEnd();
-uintptr_t    ZPlatformAddressBase();
-size_t       ZPlatformAddressOffsetBits();
-size_t       ZPlatformAddressMetadataShift();
-
-#endif // OS_CPU_LINUX_AARCH64_GC_Z_ZGLOBALS_LINUX_AARCH64_HPP
--- a/src/hotspot/os_cpu/linux_x86/gc/z/zArguments_linux_x86.cpp	Fri Aug 30 11:11:33 2019 +0200
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,42 +0,0 @@
-/*
- * Copyright (c) 2018, 2019, 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.
- */
-
-#include "precompiled.hpp"
-#include "gc/z/zArguments.hpp"
-#include "runtime/globals.hpp"
-#include "runtime/globals_extension.hpp"
-#include "utilities/debug.hpp"
-
-void ZArguments::initialize_platform() {
-#ifdef COMPILER2
-  // The C2 barrier slow path expects vector registers to be least
-  // 16 bytes wide, which is the minimum width available on all
-  // x86-64 systems. However, the user could have speficied a lower
-  // number on the command-line, in which case we print a warning
-  // and raise it to 16.
-  if (MaxVectorSize < 16) {
-    warning("ZGC requires MaxVectorSize to be at least 16");
-    FLAG_SET_DEFAULT(MaxVectorSize, 16);
-  }
-#endif
-}
--- a/src/hotspot/os_cpu/linux_x86/gc/z/zGlobals_linux_x86.cpp	Fri Aug 30 11:11:33 2019 +0200
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,173 +0,0 @@
-/*
- * Copyright (c) 2017, 2019, 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.
- */
-
-#include "precompiled.hpp"
-#include "gc/z/zGlobals.hpp"
-#include "gc/z/zUtils.inline.hpp"
-#include "runtime/globals.hpp"
-#include "utilities/globalDefinitions.hpp"
-
-//
-// The heap can have three different layouts, depending on the max heap size.
-//
-// Address Space & Pointer Layout 1
-// --------------------------------
-//
-//  +--------------------------------+ 0x00007FFFFFFFFFFF (127TB)
-//  .                                .
-//  .                                .
-//  .                                .
-//  +--------------------------------+ 0x0000014000000000 (20TB)
-//  |         Remapped View          |
-//  +--------------------------------+ 0x0000010000000000 (16TB)
-//  |     (Reserved, but unused)     |
-//  +--------------------------------+ 0x00000c0000000000 (12TB)
-//  |         Marked1 View           |
-//  +--------------------------------+ 0x0000080000000000 (8TB)
-//  |         Marked0 View           |
-//  +--------------------------------+ 0x0000040000000000 (4TB)
-//  .                                .
-//  +--------------------------------+ 0x0000000000000000
-//
-//   6                  4 4  4 4
-//   3                  6 5  2 1                                             0
-//  +--------------------+----+-----------------------------------------------+
-//  |00000000 00000000 00|1111|11 11111111 11111111 11111111 11111111 11111111|
-//  +--------------------+----+-----------------------------------------------+
-//  |                    |    |
-//  |                    |    * 41-0 Object Offset (42-bits, 4TB address space)
-//  |                    |
-//  |                    * 45-42 Metadata Bits (4-bits)  0001 = Marked0      (Address view 4-8TB)
-//  |                                                    0010 = Marked1      (Address view 8-12TB)
-//  |                                                    0100 = Remapped     (Address view 16-20TB)
-//  |                                                    1000 = Finalizable  (Address view N/A)
-//  |
-//  * 63-46 Fixed (18-bits, always zero)
-//
-//
-// Address Space & Pointer Layout 2
-// --------------------------------
-//
-//  +--------------------------------+ 0x00007FFFFFFFFFFF (127TB)
-//  .                                .
-//  .                                .
-//  .                                .
-//  +--------------------------------+ 0x0000280000000000 (40TB)
-//  |         Remapped View          |
-//  +--------------------------------+ 0x0000200000000000 (32TB)
-//  |     (Reserved, but unused)     |
-//  +--------------------------------+ 0x0000180000000000 (24TB)
-//  |         Marked1 View           |
-//  +--------------------------------+ 0x0000100000000000 (16TB)
-//  |         Marked0 View           |
-//  +--------------------------------+ 0x0000080000000000 (8TB)
-//  .                                .
-//  +--------------------------------+ 0x0000000000000000
-//
-//   6                 4 4  4 4
-//   3                 7 6  3 2                                              0
-//  +------------------+-----+------------------------------------------------+
-//  |00000000 00000000 0|1111|111 11111111 11111111 11111111 11111111 11111111|
-//  +-------------------+----+------------------------------------------------+
-//  |                   |    |
-//  |                   |    * 42-0 Object Offset (43-bits, 8TB address space)
-//  |                   |
-//  |                   * 46-43 Metadata Bits (4-bits)  0001 = Marked0      (Address view 8-16TB)
-//  |                                                   0010 = Marked1      (Address view 16-24TB)
-//  |                                                   0100 = Remapped     (Address view 32-40TB)
-//  |                                                   1000 = Finalizable  (Address view N/A)
-//  |
-//  * 63-47 Fixed (17-bits, always zero)
-//
-//
-// Address Space & Pointer Layout 3
-// --------------------------------
-//
-//  +--------------------------------+ 0x00007FFFFFFFFFFF (127TB)
-//  .                                .
-//  .                                .
-//  .                                .
-//  +--------------------------------+ 0x0000500000000000 (80TB)
-//  |         Remapped View          |
-//  +--------------------------------+ 0x0000400000000000 (64TB)
-//  |     (Reserved, but unused)     |
-//  +--------------------------------+ 0x0000300000000000 (48TB)
-//  |         Marked1 View           |
-//  +--------------------------------+ 0x0000200000000000 (32TB)
-//  |         Marked0 View           |
-//  +--------------------------------+ 0x0000100000000000 (16TB)
-//  .                                .
-//  +--------------------------------+ 0x0000000000000000
-//
-//   6               4  4  4 4
-//   3               8  7  4 3                                               0
-//  +------------------+----+-------------------------------------------------+
-//  |00000000 00000000 |1111|1111 11111111 11111111 11111111 11111111 11111111|
-//  +------------------+----+-------------------------------------------------+
-//  |                  |    |
-//  |                  |    * 43-0 Object Offset (44-bits, 16TB address space)
-//  |                  |
-//  |                  * 47-44 Metadata Bits (4-bits)  0001 = Marked0      (Address view 16-32TB)
-//  |                                                  0010 = Marked1      (Address view 32-48TB)
-//  |                                                  0100 = Remapped     (Address view 64-80TB)
-//  |                                                  1000 = Finalizable  (Address view N/A)
-//  |
-//  * 63-48 Fixed (16-bits, always zero)
-//
-
-uintptr_t ZPlatformAddressSpaceStart() {
-  const uintptr_t first_heap_view_address = (uintptr_t)1 << (ZPlatformAddressMetadataShift() + 0);
-  const size_t min_address_offset = 0;
-  return first_heap_view_address + min_address_offset;
-}
-
-uintptr_t ZPlatformAddressSpaceEnd() {
-  const uintptr_t last_heap_view_address = (uintptr_t)1 << (ZPlatformAddressMetadataShift() + 2);
-  const size_t max_address_offset = (size_t)1 << ZPlatformAddressOffsetBits();
-  return last_heap_view_address + max_address_offset;
-}
-
-uintptr_t ZPlatformAddressReservedStart() {
-  return ZPlatformAddressSpaceStart();
-}
-
-uintptr_t ZPlatformAddressReservedEnd() {
-  return ZPlatformAddressSpaceEnd();
-}
-
-uintptr_t ZPlatformAddressBase() {
-  return 0;
-}
-
-size_t ZPlatformAddressOffsetBits() {
-  const size_t min_address_offset_bits = 42; // 4TB
-  const size_t max_address_offset_bits = 44; // 16TB
-  const size_t virtual_to_physical_ratio = 7; // 7:1
-  const size_t address_offset = ZUtils::round_up_power_of_2(MaxHeapSize * virtual_to_physical_ratio);
-  const size_t address_offset_bits = log2_intptr(address_offset);
-  return MIN2(MAX2(address_offset_bits, min_address_offset_bits), max_address_offset_bits);
-}
-
-size_t ZPlatformAddressMetadataShift() {
-  return ZPlatformAddressOffsetBits();
-}
--- a/src/hotspot/os_cpu/linux_x86/gc/z/zGlobals_linux_x86.hpp	Fri Aug 30 11:11:33 2019 +0200
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,51 +0,0 @@
-/*
- * Copyright (c) 2015, 2019, 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.
- */
-
-#ifndef OS_CPU_LINUX_X86_GC_Z_ZGLOBALS_LINUX_X86_HPP
-#define OS_CPU_LINUX_X86_GC_Z_ZGLOBALS_LINUX_X86_HPP
-
-//
-// Page Allocation Tiers
-// ---------------------
-//
-//  Page Type     Page Size     Object Size Limit     Object Alignment
-//  ------------------------------------------------------------------
-//  Small         2M            <= 265K               <MinObjAlignmentInBytes>
-//  Medium        32M           <= 4M                 4K
-//  Large         X*M           > 4M                  2M
-//  ------------------------------------------------------------------
-//
-const size_t ZPlatformGranuleSizeShift      = 21; // 2MB
-const size_t ZPlatformMaxHeapSizeShift      = 46; // 16TB
-const size_t ZPlatformNMethodDisarmedOffset = 4;
-const size_t ZPlatformCacheLineSize         = 64;
-
-uintptr_t    ZPlatformAddressSpaceStart();
-uintptr_t    ZPlatformAddressSpaceEnd();
-uintptr_t    ZPlatformAddressReservedStart();
-uintptr_t    ZPlatformAddressReservedEnd();
-uintptr_t    ZPlatformAddressBase();
-size_t       ZPlatformAddressOffsetBits();
-size_t       ZPlatformAddressMetadataShift();
-
-#endif // OS_CPU_LINUX_X86_GC_Z_ZGLOBALS_LINUX_X86_HPP
--- a/src/hotspot/share/gc/z/zGlobals.hpp	Fri Aug 30 11:11:33 2019 +0200
+++ b/src/hotspot/share/gc/z/zGlobals.hpp	Fri Aug 30 10:44:06 2019 +0200
@@ -26,7 +26,7 @@
 
 #include "utilities/globalDefinitions.hpp"
 #include "utilities/macros.hpp"
-#include OS_CPU_HEADER(gc/z/zGlobals)
+#include CPU_HEADER(gc/z/zGlobals)
 
 // Collector name
 const char* const ZName                         = "The Z Garbage Collector";