Restore freeNoAutorelease

Author: chrisseaton

src/main/java/org/truffleruby/cext/ValueWrapperManager.java

@@ -117,7 +117,7 @@ public void addFinalizer(ValueWrapper wrapper, Pointer handle) {
     private Runnable createFinalizer(Pointer handle) {
         return () -> {
             this.removeFromHandleMap(handle.getAddress());
-            handle.free();
+            handle.freeNoAutorelease();
         };
 
     }

src/main/java/org/truffleruby/core/support/IONodes.java

@@ -490,7 +490,7 @@ public static Pointer getBuffer(RubyContext context, long size) {
             if (buffer.getSize() >= size) {
                 return buffer;
             } else {
-                buffer.free();
+                buffer.freeNoAutorelease();
                 final Pointer newBuffer = Pointer.malloc(Math.max(size * 2, 1024));
                 Layouts.THREAD.setIoBuffer(rubyThread, newBuffer);
                 return newBuffer;

src/main/java/org/truffleruby/core/thread/ThreadManager.java

@@ -337,7 +337,7 @@ public void cleanup(DynamicObject thread, Thread javaThread) {
         final FiberManager fiberManager = Layouts.THREAD.getFiberManager(thread);
         fiberManager.shutdown(javaThread);
 
-        Layouts.THREAD.getIoBuffer(thread).free();
+        Layouts.THREAD.getIoBuffer(thread).freeNoAutorelease();
 
         unregisterThread(thread);
         Layouts.THREAD.setThread(thread, null);

src/main/java/org/truffleruby/extra/ffi/Pointer.java

@@ -225,14 +225,17 @@ public synchronized void free(FinalizationService finalizationService) {
         UNSAFE.freeMemory(address);
     }
 
-    public synchronized void free() {
-        assert !autorelease;
+    @TruffleBoundary
+    public synchronized void freeNoAutorelease() {
+        if (autorelease) {
+            throw new UnsupportedOperationException("Calling freeNoAutorelease() on a autorelease Pointer");
+        }
         UNSAFE.freeMemory(address);
     }
 
     @Override
     public void close() {
-        free();
+        freeNoAutorelease();
     }
 
     public long getAddress() {