[Truffle] Print warning when running without Graal

jruby · Jan 4, 2016 · 1eb3fc0 · chrisseaton · Jan 4, 2016 · pitr-ch
1 parent fbb40d1
commit 1eb3fc0
Showing 2 changed files with 10 additions and 1 deletion.
diff --git a/truffle/src/main/java/org/jruby/truffle/nodes/core/TrufflePrimitiveNodes.java b/truffle/src/main/java/org/jruby/truffle/nodes/core/TrufflePrimitiveNodes.java
@@ -235,7 +235,7 @@ public GraalNode(RubyContext context, SourceSection sourceSection) {
         @TruffleBoundary
         @Specialization
         public boolean graal() {
-            return Truffle.getRuntime().getName().toLowerCase(Locale.ENGLISH).contains("graal");
+            return getContext().onGraal();
         }
 
     }

diff --git a/truffle/src/main/java/org/jruby/truffle/runtime/RubyContext.java b/truffle/src/main/java/org/jruby/truffle/runtime/RubyContext.java
@@ -67,6 +67,7 @@
 import java.math.BigInteger;
 import java.util.Arrays;
 import java.util.HashMap;
+import java.util.Locale;
 import java.util.Map;
 import java.util.concurrent.ThreadLocalRandom;
 import java.util.concurrent.atomic.AtomicLong;
@@ -125,6 +126,10 @@ public RubyContext(Ruby runtime, TruffleLanguage.Env env) {
 
         compilerOptions = Truffle.getRuntime().createCompilerOptions();
 
+        if (!onGraal()) {
+            System.err.println("JRuby+Truffle is designed to be run with a JVM that has the Graal compiler. See https://github.com/jruby/jruby/wiki/Truffle-FAQ#how-do-i-get-jrubytruffle");
+        }
+
         if (compilerOptions.supportsOption("MinTimeThreshold")) {
             compilerOptions.setOption("MinTimeThreshold", 100000000);
         }
@@ -200,6 +205,10 @@ public RubyContext(Ruby runtime, TruffleLanguage.Env env) {
         initialize();
     }
 
+    public boolean onGraal() {
+        return Truffle.getRuntime().getName().toLowerCase(Locale.ENGLISH).contains("graal");
+    }
+
     public Object send(Object object, String methodName, DynamicObject block, Object... arguments) {
         CompilerAsserts.neverPartOfCompilation();