jruby · Feb 14, 2016 · Feb 14, 2016 · Feb 14, 2016 · Feb 14, 2016 · Feb 14, 2016
diff --git a/core/src/main/java/org/jruby/util/cli/Options.java b/core/src/main/java/org/jruby/util/cli/Options.java
@@ -224,7 +224,7 @@ public class Options {
     public static final Option<Boolean> TRUFFLE_COVERAGE_GLOBAL = bool(TRUFFLE, "truffle.coverage.global", false, "Run coverage for all code and print results on exit.");
 
     public static final Option<String> TRUFFLE_CORE_LOAD_PATH = string(TRUFFLE, "truffle.core.load_path", "truffle:/jruby-truffle", "Location to load the Truffle core library from.");
-    public static final Option<Boolean> TRUFFLE_POSIX_USE_JAVA = bool(TRUFFLE, "truffle.posix.use_java", false, "Use a Java emulation of POSIX.");
+    public static final Option<Boolean> TRUFFLE_PLATFORM_USE_JAVA = bool(TRUFFLE, "truffle.platform.use_java", false, "Use a pure-Java platform, so no native POSIX.");
 
     public static final Option<Integer> TRUFFLE_ARRAY_UNINITIALIZED_SIZE = integer(TRUFFLE, "truffle.array.uninitialized_size", 32, "How large an Array to allocate when we have no other information to go on.");
     public static final Option<Integer> TRUFFLE_ARRAY_SMALL = integer(TRUFFLE, "truffle.array.small", 3, "Maximum size of an Array to consider small for optimisations.");

diff --git a/test/truffle/integration/java-platform.sh b/test/truffle/integration/java-platform.sh
@@ -0,0 +1,3 @@
+#!/usr/bin/env bash
+
+ruby -X+T -Xtruffle.platform.use_java=true -e 'puts 14'
diff --git a/truffle/src/main/java/org/jruby/truffle/JRubyTruffleImpl.java b/truffle/src/main/java/org/jruby/truffle/JRubyTruffleImpl.java
@@ -13,6 +13,9 @@
 import com.oracle.truffle.api.vm.PolyglotEngine;
 import org.jruby.JRubyTruffleInterface;
 import org.jruby.Ruby;
+import org.jruby.truffle.interop.JRubyContextWrapper;
+import org.jruby.truffle.platform.Graal;
+import org.jruby.util.cli.Options;
 
 import java.io.IOException;
 
@@ -21,9 +24,10 @@ public class JRubyTruffleImpl implements JRubyTruffleInterface {
     private final PolyglotEngine engine;
     private final RubyContext context;
 
-    // Run by reflection from Ruby#loadTruffle
+    // Created by reflection from Ruby#loadTruffle
+
     public JRubyTruffleImpl(Ruby runtime) {
-        engine = PolyglotEngine.newBuilder().globalSymbol(JRubyTruffleInterface.RUNTIME_SYMBOL, new RubyLanguage.JRubyContextWrapper(runtime)).build();
+        engine = PolyglotEngine.newBuilder().globalSymbol(JRubyTruffleInterface.RUNTIME_SYMBOL, new JRubyContextWrapper(runtime)).build();
 
         try {
             context = (RubyContext) engine.eval(Source.fromText("Truffle::Primitive.context", "context").withMimeType(RubyLanguage.MIME_TYPE)).get();
@@ -34,10 +38,17 @@ public JRubyTruffleImpl(Ruby runtime) {
 
     @Override
     public Object execute(org.jruby.ast.RootNode rootNode) {
+        if (!Graal.isGraal() && Options.TRUFFLE_GRAAL_WARNING_UNLESS.load()) {
+            System.err.println("WARNING: This JVM does not have the Graal compiler. " +
+                    "JRuby+Truffle's performance without it will be limited. " +
+                    "See https://github.com/jruby/jruby/wiki/Truffle-FAQ#how-do-i-get-jrubytruffle");
+        }
+
         context.setInitialJRubyRootNode(rootNode);
 
         try {
-            return engine.eval(Source.fromText("Truffle::Primitive.run_jruby_root", "run_jruby_root").withMimeType(RubyLanguage.MIME_TYPE)).get();
+            return engine.eval(Source.fromText("Truffle::Primitive.run_jruby_root", "run_jruby_root")
+                    .withMimeType(RubyLanguage.MIME_TYPE)).get();
         } catch (IOException e) {
             if (e.getCause() instanceof RuntimeException) {
                 throw (RuntimeException) e.getCause();
@@ -51,4 +62,5 @@ public Object execute(org.jruby.ast.RootNode rootNode) {
     public void dispose() {
         engine.dispose();
     }
+
 }
Original file line number	Diff line number	Diff line change
		@@ -0,0 +1,3 @@
		#!/usr/bin/env bash

		ruby -X+T -Xtruffle.platform.use_java=true -e 'puts 14'