fs: fs.readFile should not throw uncaughtException

Reviewed-By: Fedor Indutny <fedor@indutny.com>

lib/fs.js

@@ -239,10 +239,13 @@ fs.readFile = function(path, options, callback_) {
         return read();
       }
 
-      if (size > kMaxLength)
-        throw new RangeError('File size is greater than possible Buffer: ' +
-                             '0x3FFFFFFF bytes');
-
+      if (size > kMaxLength) {
+        var err = new RangeError('File size is greater than possible Buffer: ' +
+            '0x3FFFFFFF bytes');
+        return fs.close(fd, function() {
+          callback(err);
+        });
+      }
       buffer = new Buffer(size);
       read();
     });

test/pummel/test-fs-readfile-large.js

@@ -0,0 +1,60 @@
+// Copyright Joyent, Inc. and other Node contributors.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to permit
+// persons to whom the Software is furnished to do so, subject to the
+// following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+// USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+var common = require('../common');
+var assert = require('assert');
+
+var path = require('path'),
+  fs = require('fs'),
+  filename = path.join(common.fixturesDir, 'large_file.txt');
+
+var filesize = 1024 * 1024 * 1024;
+
+function makeFile(done) {
+  var buf = new Buffer(filesize / 1024);
+  buf.fill('a');
+
+  try { fs.unlinkSync(filename); } catch (e) {}
+  var w = 1024;
+  var ws = fs.createWriteStream(filename);
+  ws.on('close', done);
+  ws.on('drain', write);
+  write();
+  function write() {
+    do {
+      w--;
+    } while (false !== ws.write(buf) && w > 0);
+    if (w === 0)
+      ws.end();
+  }
+}
+
+makeFile(function () {
+  fs.readFile(filename, function(err) {
+    assert.ok(err, 'should get RangeError');
+    assert.equal(err.name, 'RangeError', 'should get RangeError');
+    try { fs.unlinkSync(filename); } catch (e) {}
+  });
+});
+
+process.on('uncaughtException', function (err) {
+  assert.ok(!err, 'should not throw uncaughtException');
+});