--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/hotspot/share/runtime/commandLineFlagConstraintsRuntime.cpp	Mon Apr 23 14:51:16 2018 -0500
@@ -0,0 +1,143 @@
+/*
+ * Copyright (c) 2015, 2017, 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 "runtime/arguments.hpp"
+#include "runtime/commandLineFlagConstraintsRuntime.hpp"
+#include "runtime/commandLineFlagRangeList.hpp"
+#include "runtime/globals.hpp"
+#include "runtime/safepointMechanism.hpp"
+#include "runtime/task.hpp"
+#include "utilities/defaultStream.hpp"
+
+Flag::Error ObjectAlignmentInBytesConstraintFunc(intx value, bool verbose) {
+  if (!is_power_of_2(value)) {
+    CommandLineError::print(verbose,
+                            "ObjectAlignmentInBytes (" INTX_FORMAT ") must be "
+                            "power of 2\n",
+                            value);
+    return Flag::VIOLATES_CONSTRAINT;
+  }
+  // In case page size is very small.
+  if (value >= (intx)os::vm_page_size()) {
+    CommandLineError::print(verbose,
+                            "ObjectAlignmentInBytes (" INTX_FORMAT ") must be "
+                            "less than page size (" INTX_FORMAT ")\n",
+                            value, (intx)os::vm_page_size());
+    return Flag::VIOLATES_CONSTRAINT;
+  }
+  return Flag::SUCCESS;
+}
+
+// Need to enforce the padding not to break the existing field alignments.
+// It is sufficient to check against the largest type size.
+Flag::Error ContendedPaddingWidthConstraintFunc(intx value, bool verbose) {
+  if ((value % BytesPerLong) != 0) {
+    CommandLineError::print(verbose,
+                            "ContendedPaddingWidth (" INTX_FORMAT ") must be "
+                            "a multiple of %d\n",
+                            value, BytesPerLong);
+    return Flag::VIOLATES_CONSTRAINT;
+  } else {
+    return Flag::SUCCESS;
+  }
+}
+
+Flag::Error BiasedLockingBulkRebiasThresholdFunc(intx value, bool verbose) {
+  if (value > BiasedLockingBulkRevokeThreshold) {
+    CommandLineError::print(verbose,
+                            "BiasedLockingBulkRebiasThreshold (" INTX_FORMAT ") must be "
+                            "less than or equal to BiasedLockingBulkRevokeThreshold (" INTX_FORMAT ")\n",
+                            value, BiasedLockingBulkRevokeThreshold);
+    return Flag::VIOLATES_CONSTRAINT;
+  } else {
+    return Flag::SUCCESS;
+  }
+}
+
+Flag::Error BiasedLockingStartupDelayFunc(intx value, bool verbose) {
+  if ((value % PeriodicTask::interval_gran) != 0) {
+    CommandLineError::print(verbose,
+                            "BiasedLockingStartupDelay (" INTX_FORMAT ") must be "
+                            "evenly divisible by PeriodicTask::interval_gran (" INTX_FORMAT ")\n",
+                            value, PeriodicTask::interval_gran);
+    return Flag::VIOLATES_CONSTRAINT;
+  } else {
+    return Flag::SUCCESS;
+  }
+}
+
+Flag::Error BiasedLockingBulkRevokeThresholdFunc(intx value, bool verbose) {
+  if (value < BiasedLockingBulkRebiasThreshold) {
+    CommandLineError::print(verbose,
+                            "BiasedLockingBulkRevokeThreshold (" INTX_FORMAT ") must be "
+                            "greater than or equal to BiasedLockingBulkRebiasThreshold (" INTX_FORMAT ")\n",
+                            value, BiasedLockingBulkRebiasThreshold);
+    return Flag::VIOLATES_CONSTRAINT;
+  } else if ((double)value/(double)BiasedLockingDecayTime > 0.1) {
+    CommandLineError::print(verbose,
+                            "The ratio of BiasedLockingBulkRevokeThreshold (" INTX_FORMAT ")"
+                            " to BiasedLockingDecayTime (" INTX_FORMAT ") must be "
+                            "less than or equal to 0.1\n",
+                            value, BiasedLockingBulkRebiasThreshold);
+    return Flag::VIOLATES_CONSTRAINT;
+  } else {
+    return Flag::SUCCESS;
+  }
+}
+
+Flag::Error BiasedLockingDecayTimeFunc(intx value, bool verbose) {
+  if (BiasedLockingBulkRebiasThreshold/(double)value > 0.1) {
+    CommandLineError::print(verbose,
+                            "The ratio of BiasedLockingBulkRebiasThreshold (" INTX_FORMAT ")"
+                            " to BiasedLockingDecayTime (" INTX_FORMAT ") must be "
+                            "less than or equal to 0.1\n",
+                            BiasedLockingBulkRebiasThreshold, value);
+    return Flag::VIOLATES_CONSTRAINT;
+  } else {
+    return Flag::SUCCESS;
+  }
+}
+
+Flag::Error PerfDataSamplingIntervalFunc(intx value, bool verbose) {
+  if ((value % PeriodicTask::interval_gran != 0)) {
+    CommandLineError::print(verbose,
+                            "PerfDataSamplingInterval (" INTX_FORMAT ") must be "
+                            "evenly divisible by PeriodicTask::interval_gran (" INTX_FORMAT ")\n",
+                            value, PeriodicTask::interval_gran);
+    return Flag::VIOLATES_CONSTRAINT;
+  } else {
+    return Flag::SUCCESS;
+  }
+}
+
+Flag::Error ThreadLocalHandshakesConstraintFunc(bool value, bool verbose) {
+  if (value) {
+    if (!SafepointMechanism::supports_thread_local_poll()) {
+      CommandLineError::print(verbose, "ThreadLocalHandshakes not yet supported on this platform\n");
+      return Flag::VIOLATES_CONSTRAINT;
+    }
+  }
+  return Flag::SUCCESS;
+}