--- old/src/jdk.vm.ci/share/classes/jdk.vm.ci.hotspot/src/jdk/vm/ci/hotspot/HotSpotConstantReflectionProvider.java	2016-01-12 10:00:56.000000000 -1000
+++ new/src/jdk.vm.ci/share/classes/jdk.vm.ci.hotspot/src/jdk/vm/ci/hotspot/HotSpotConstantReflectionProvider.java	2016-01-12 10:00:56.000000000 -1000
@@ -27,6 +27,7 @@
 
 import java.lang.reflect.Array;
 
+import jdk.vm.ci.hotspot.HotSpotJVMCIRuntime.Option;
 import jdk.vm.ci.meta.Constant;
 import jdk.vm.ci.meta.ConstantReflectionProvider;
 import jdk.vm.ci.meta.JavaConstant;
@@ -45,7 +46,7 @@
     /**
      * Determines whether to treat {@code final} fields with default values as constant.
      */
-    private static final boolean TrustFinalDefaultFields = HotSpotJVMCIRuntime.getBooleanProperty("TrustFinalDefaultFields", true);
+    private static final boolean TrustFinalDefaultFields = HotSpotJVMCIRuntime.getBooleanProperty(Option.TrustFinalDefaultFields, true);
 
     protected final HotSpotJVMCIRuntimeProvider runtime;
     protected final HotSpotMethodHandleAccessProvider methodHandleAccess;
--- old/src/jdk.vm.ci/share/classes/jdk.vm.ci.hotspot/src/jdk/vm/ci/hotspot/HotSpotJVMCIRuntime.java	2016-01-12 10:00:57.000000000 -1000
+++ new/src/jdk.vm.ci/share/classes/jdk.vm.ci.hotspot/src/jdk/vm/ci/hotspot/HotSpotJVMCIRuntime.java	2016-01-12 10:00:57.000000000 -1000
@@ -26,6 +26,7 @@
 
 import java.io.IOException;
 import java.io.OutputStream;
+import java.io.PrintStream;
 import java.lang.reflect.Array;
 import java.lang.reflect.Field;
 import java.lang.reflect.Method;
@@ -85,15 +86,66 @@
     }
 
     /**
+     * A list of all supported JVMCI options.
+     */
+    public enum Option {
+        ImplicitStableValues,
+        InitTimer,  // Note: Not used because of visibility issues (see InitTimer.ENABLED).
+        PrintConfig,
+        PrintFlags,
+        ShowFlags,
+        TraceMethodDataFilter,
+        TrustFinalDefaultFields;
+
+        /**
+         * Prints all option flags to {@code out}.
+         *
+         * @param out stream to print to
+         */
+        public static void printFlags(PrintStream out) {
+            out.println("[List of JVMCI options]");
+            for (Option e : values()) {
+                out.println(e);
+            }
+        }
+    }
+
+    /**
+     * The prefix for system properties that are JVMCI options.
+     */
+    private static final String JVMCI_OPTION_PROPERTY_PREFIX = "jvmci.";
+
+    /**
+     * Gets a String value based on a system property {@linkplain VM#getSavedProperty(String) saved}
+     * at system initialization time. The property name must start with an upper-case letter and is
+     * prefixed with {@link #JVMCI_OPTION_PROPERTY_PREFIX}.
+     *
+     * @param option the name of the system property
+     * @param def the value to return if there is no system property corresponding to {@code name}
+     */
+    public static String getProperty(Option option, String def) {
+        String optionName = option.name();
+        if (!Character.isUpperCase(optionName.charAt(0))) {
+            throw new JVMCIError("Option name must start with upper-case letter: " + optionName);
+        }
+        String value = VM.getSavedProperty(JVMCI_OPTION_PROPERTY_PREFIX + optionName);
+        if (value == null) {
+            return def;
+        }
+        return value;
+    }
+
+    /**
      * Gets a boolean value based on a system property {@linkplain VM#getSavedProperty(String)
-     * saved} at system initialization time. The property name is prefixed with "{@code jvmci.}".
+     * saved} at system initialization time. The property name must start with an upper-case letter
+     * and is prefixed with {@link #JVMCI_OPTION_PROPERTY_PREFIX}.
      *
-     * @param name the name of the system property to derive a boolean value from using
+     * @param option the name of the system property to derive a boolean value from using
      *            {@link Boolean#parseBoolean(String)}
      * @param def the value to return if there is no system property corresponding to {@code name}
      */
-    public static boolean getBooleanProperty(String name, boolean def) {
-        String value = VM.getSavedProperty("jvmci." + name);
+    public static boolean getBooleanProperty(Option option, boolean def) {
+        String value = getProperty(option, null);
         if (value == null) {
             return def;
         }
@@ -164,7 +216,16 @@
         }
         metaAccessContext = context;
 
-        if (Boolean.valueOf(System.getProperty("jvmci.printconfig"))) {
+        boolean printFlags = getBooleanProperty(Option.PrintFlags, false);
+        boolean showFlags = getBooleanProperty(Option.ShowFlags, false);
+        if (printFlags || showFlags) {
+            Option.printFlags(System.out);
+            if (printFlags) {
+                System.exit(0);
+            }
+        }
+
+        if (getBooleanProperty(Option.PrintConfig, false)) {
             printConfig(config, compilerToVm);
         }
 
--- old/src/jdk.vm.ci/share/classes/jdk.vm.ci.hotspot/src/jdk/vm/ci/hotspot/HotSpotResolvedJavaFieldImpl.java	2016-01-12 10:00:58.000000000 -1000
+++ new/src/jdk.vm.ci/share/classes/jdk.vm.ci.hotspot/src/jdk/vm/ci/hotspot/HotSpotResolvedJavaFieldImpl.java	2016-01-12 10:00:58.000000000 -1000
@@ -29,6 +29,7 @@
 import java.lang.reflect.Field;
 
 import jdk.vm.ci.common.JVMCIError;
+import jdk.vm.ci.hotspot.HotSpotJVMCIRuntime.Option;
 import jdk.vm.ci.meta.JavaType;
 import jdk.vm.ci.meta.LocationIdentity;
 import jdk.vm.ci.meta.MetaAccessProvider;
@@ -44,7 +45,7 @@
     /**
      * Mark well-known stable fields as such.
      */
-    private static final boolean ImplicitStableValues = HotSpotJVMCIRuntime.getBooleanProperty("ImplicitStableValues", true);
+    private static final boolean ImplicitStableValues = HotSpotJVMCIRuntime.getBooleanProperty(Option.ImplicitStableValues, true);
 
     private final HotSpotResolvedObjectTypeImpl holder;
     private final String name;
--- old/src/jdk.vm.ci/share/classes/jdk.vm.ci.hotspot/src/jdk/vm/ci/hotspot/HotSpotResolvedJavaMethodImpl.java	2016-01-12 10:00:59.000000000 -1000
+++ new/src/jdk.vm.ci/share/classes/jdk.vm.ci.hotspot/src/jdk/vm/ci/hotspot/HotSpotResolvedJavaMethodImpl.java	2016-01-12 10:00:59.000000000 -1000
@@ -37,6 +37,7 @@
 import java.util.Map;
 
 import jdk.vm.ci.common.JVMCIError;
+import jdk.vm.ci.hotspot.HotSpotJVMCIRuntime.Option;
 import jdk.vm.ci.meta.Constant;
 import jdk.vm.ci.meta.ConstantPool;
 import jdk.vm.ci.meta.DefaultProfilingInfo;
@@ -417,7 +418,7 @@
         return false;
     }
 
-    private static final String TraceMethodDataFilter = System.getProperty("jvmci.traceMethodDataFilter");
+    private static final String TraceMethodDataFilter = HotSpotJVMCIRuntime.getProperty(Option.TraceMethodDataFilter, null);
 
     @Override
     public ProfilingInfo getProfilingInfo(boolean includeNormal, boolean includeOSR) {
--- old/src/jdk.vm.ci/share/classes/jdk.vm.ci.inittimer/src/jdk/vm/ci/inittimer/InitTimer.java	2016-01-12 10:01:00.000000000 -1000
+++ new/src/jdk.vm.ci/share/classes/jdk.vm.ci.inittimer/src/jdk/vm/ci/inittimer/InitTimer.java	2016-01-12 10:01:00.000000000 -1000
@@ -65,9 +65,11 @@
     }
 
     /**
-     * Specifies if initialization timing is enabled.
+     * Specifies if initialization timing is enabled. Note: this property cannot use
+     * {@code HotSpotJVMCIRuntime.getBooleanProperty} since that class is not visible from this
+     * package.
      */
-    private static final boolean ENABLED = Boolean.getBoolean("jvmci.inittimer") || Boolean.getBoolean("jvmci.runtime.TimeInit");
+    private static final boolean ENABLED = Boolean.getBoolean("jvmci.InitTimer");
 
     public static final AtomicInteger nesting = ENABLED ? new AtomicInteger() : null;
     public static final String SPACES = "                                            ";