# HG changeset patch
# User Andreas Woess <andreas.woess@oracle.com>
# Date 1426603773 -3600
# Node ID 4b6a65cb8ecdaa5d6cbf1c71fa0171b2b748a397
# Parent  08233b1ae932f38fe3d97eec395082f9defc114a
Truffle: repair TraceTruffleTransferToInterpreter option

diff -r 08233b1ae932 -r 4b6a65cb8ecd graal/com.oracle.graal.truffle.hotspot/src/com/oracle/graal/truffle/hotspot/HotSpotTruffleRuntime.java
--- a/graal/com.oracle.graal.truffle.hotspot/src/com/oracle/graal/truffle/hotspot/HotSpotTruffleRuntime.java	Tue Mar 17 15:39:46 2015 +0100
+++ b/graal/com.oracle.graal.truffle.hotspot/src/com/oracle/graal/truffle/hotspot/HotSpotTruffleRuntime.java	Tue Mar 17 15:49:33 2015 +0100
@@ -37,6 +37,7 @@
 import com.oracle.graal.api.meta.*;
 import com.oracle.graal.api.runtime.*;
 import com.oracle.graal.compiler.*;
+import com.oracle.graal.compiler.common.*;
 import com.oracle.graal.compiler.target.*;
 import com.oracle.graal.debug.*;
 import com.oracle.graal.debug.Debug.Scope;
@@ -44,7 +45,6 @@
 import com.oracle.graal.graphbuilderconf.GraphBuilderConfiguration.Plugins;
 import com.oracle.graal.hotspot.*;
 import com.oracle.graal.hotspot.meta.*;
-import com.oracle.graal.hotspot.nodes.*;
 import com.oracle.graal.java.*;
 import com.oracle.graal.lir.asm.*;
 import com.oracle.graal.lir.phases.*;
@@ -58,7 +58,6 @@
 import com.oracle.graal.printer.*;
 import com.oracle.graal.runtime.*;
 import com.oracle.graal.truffle.*;
-import com.oracle.graal.word.*;
 import com.oracle.truffle.api.*;
 import com.oracle.truffle.api.nodes.*;
 
@@ -80,6 +79,7 @@
     private final ThreadPoolExecutor compileQueue;
 
     private final Map<RootCallTarget, Void> callTargets = Collections.synchronizedMap(new WeakHashMap<RootCallTarget, Void>());
+    private static final long THREAD_EETOP_OFFSET = eetopOffset();
 
     private HotSpotTruffleRuntime() {
         installOptimizedCallTargetCallMethod();
@@ -321,10 +321,11 @@
     public void notifyTransferToInterpreter() {
         CompilerAsserts.neverPartOfCompilation();
         if (TraceTruffleTransferToInterpreter.getValue()) {
-            Word thread = CurrentJavaThreadNode.get();
-            boolean deoptimized = thread.readByte(HotSpotGraalRuntime.runtime().getConfig().pendingTransferToInterpreterOffset) != 0;
+            long thread = UnsafeAccess.unsafe.getLong(Thread.currentThread(), THREAD_EETOP_OFFSET);
+            long pendingTransferToInterpreterAddress = thread + HotSpotGraalRuntime.runtime().getConfig().pendingTransferToInterpreterOffset;
+            boolean deoptimized = UnsafeAccess.unsafe.getByte(pendingTransferToInterpreterAddress) != 0;
             if (deoptimized) {
-                thread.writeByte(HotSpotGraalRuntime.runtime().getConfig().pendingTransferToInterpreterOffset, (byte) 0);
+                UnsafeAccess.unsafe.putByte(pendingTransferToInterpreterAddress, (byte) 0);
 
                 logTransferToInterpreter();
             }
@@ -338,4 +339,12 @@
         String suffix = stackTrace.length > skip + limit ? "\n  ..." : "";
         TTY.out().out().println(Arrays.stream(stackTrace).skip(skip).limit(limit).map(StackTraceElement::toString).collect(Collectors.joining("\n  ", "", suffix)));
     }
+
+    private static long eetopOffset() {
+        try {
+            return UnsafeAccess.unsafe.objectFieldOffset(Thread.class.getDeclaredField("eetop"));
+        } catch (Exception e) {
+            throw new GraalInternalError(e);
+        }
+    }
 }