[Truffle] Avoid an extra buffer allocation for File.readlink.

jruby · May 29, 2015 · ac481dd · ac481dd
1 parent 13d3bfb
commit ac481dd
Showing 1 changed file with 2 additions and 5 deletions.
diff --git a/truffle/src/main/java/org/jruby/truffle/nodes/rubinius/PosixNodes.java b/truffle/src/main/java/org/jruby/truffle/nodes/rubinius/PosixNodes.java
@@ -241,17 +241,14 @@ public ReadlinkNode(RubyContext context, SourceSection sourceSection) {
         @Specialization
         public int readlink(RubyString path, RubyBasicObject pointer, int bufsize) {
             final String pathString = RubyEncoding.decodeUTF8(path.getByteList().getUnsafeBytes(), path.getByteList().getBegin(), path.getByteList().getRealSize());
+            final long address = PointerPrimitiveNodes.getPointer(pointer).address();
 
-            final byte[] buffer = new byte[bufsize];
-
-            final int result = posix().readlink(pathString, buffer, bufsize);
+            final int result = posix().readlink(pathString, address, bufsize);
             if (result == -1) {
                 CompilerDirectives.transferToInterpreter();
                 throw new RaiseException(getContext().getCoreLibrary().errnoError(posix().errno(), this));
             }
 
-            PointerPrimitiveNodes.getPointer(pointer).put(0, buffer, 0, buffer.length);
-
             return result;
         }