Prevent unbounded growth of the getField/setField closure caches.

tests/lib/mirrors/accessor_cache_overflow_test.dart

Index: tests/lib/mirrors/accessor_cache_overflow_test.dart
diff --git a/tests/lib/mirrors/accessor_cache_overflow_test.dart b/tests/lib/mirrors/accessor_cache_overflow_test.dart
new file mode 100644
index 0000000000000000000000000000000000000000..ff0525f75f02b69ad4c07e4164e306cf6d6b7aad
--- /dev/null
+++ b/tests/lib/mirrors/accessor_cache_overflow_test.dart
@@ -0,0 +1,287 @@
+// Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+library test.hot_get_field;

[Ivan Posva, 2014/04/25 17:07:08]

Please explain the purpose of this test in a comment.

[rmacnak, 2014/04/25 17:46:22]

Done.

+
+import 'dart:mirrors';
+import 'package:expect/expect.dart';
+
+const int optimizationThreshold = 20;
+
+main() {
+  var digits = ['0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F'];

[Ivan Posva, 2014/04/25 17:07:08]

long line

+  var symbols = new List();
+  for (var high in digits) {
+    for (var low in digits) {
+      symbols.add(MirrorSystem.getSymbol("v$high$low"));
+    }
+  }
+
+  var im = reflect(new C());
+  for (var i = 0; i < optimizationThreshold * 2; i++) {
+    for (var fieldName in symbols) {
+      im.getField(fieldName);
+      im.setField(fieldName, 'foo');
+    }
+  }
+}
+
+class C {
+  var v00;
+  var v01;
+  var v02;
+  var v03;
+  var v04;
+  var v05;
+  var v06;
+  var v07;
+  var v08;
+  var v09;
+  var v0A;
+  var v0B;
+  var v0C;
+  var v0D;
+  var v0E;
+  var v0F;
+  var v10;
+  var v11;
+  var v12;
+  var v13;
+  var v14;
+  var v15;
+  var v16;
+  var v17;
+  var v18;
+  var v19;
+  var v1A;
+  var v1B;
+  var v1C;
+  var v1D;
+  var v1E;
+  var v1F;
+  var v20;
+  var v21;
+  var v22;
+  var v23;
+  var v24;
+  var v25;
+  var v26;
+  var v27;
+  var v28;
+  var v29;
+  var v2A;
+  var v2B;
+  var v2C;
+  var v2D;
+  var v2E;
+  var v2F;
+  var v30;
+  var v31;
+  var v32;
+  var v33;
+  var v34;
+  var v35;
+  var v36;
+  var v37;
+  var v38;
+  var v39;
+  var v3A;
+  var v3B;
+  var v3C;
+  var v3D;
+  var v3E;
+  var v3F;
+  var v40;
+  var v41;
+  var v42;
+  var v43;
+  var v44;
+  var v45;
+  var v46;
+  var v47;
+  var v48;
+  var v49;
+  var v4A;
+  var v4B;
+  var v4C;
+  var v4D;
+  var v4E;
+  var v4F;
+  var v50;
+  var v51;
+  var v52;
+  var v53;
+  var v54;
+  var v55;
+  var v56;
+  var v57;
+  var v58;
+  var v59;
+  var v5A;
+  var v5B;
+  var v5C;
+  var v5D;
+  var v5E;
+  var v5F;
+  var v60;
+  var v61;
+  var v62;
+  var v63;
+  var v64;
+  var v65;
+  var v66;
+  var v67;
+  var v68;
+  var v69;
+  var v6A;
+  var v6B;
+  var v6C;
+  var v6D;
+  var v6E;
+  var v6F;
+  var v70;
+  var v71;
+  var v72;
+  var v73;
+  var v74;
+  var v75;
+  var v76;
+  var v77;
+  var v78;
+  var v79;
+  var v7A;
+  var v7B;
+  var v7C;
+  var v7D;
+  var v7E;
+  var v7F;
+  var v80;
+  var v81;
+  var v82;
+  var v83;
+  var v84;
+  var v85;
+  var v86;
+  var v87;
+  var v88;
+  var v89;
+  var v8A;
+  var v8B;
+  var v8C;
+  var v8D;
+  var v8E;
+  var v8F;
+  var v90;
+  var v91;
+  var v92;
+  var v93;
+  var v94;
+  var v95;
+  var v96;
+  var v97;
+  var v98;
+  var v99;
+  var v9A;
+  var v9B;
+  var v9C;
+  var v9D;
+  var v9E;
+  var v9F;
+  var vA0;
+  var vA1;
+  var vA2;
+  var vA3;
+  var vA4;
+  var vA5;
+  var vA6;
+  var vA7;
+  var vA8;
+  var vA9;
+  var vAA;
+  var vAB;
+  var vAC;
+  var vAD;
+  var vAE;
+  var vAF;
+  var vB0;
+  var vB1;
+  var vB2;
+  var vB3;
+  var vB4;
+  var vB5;
+  var vB6;
+  var vB7;
+  var vB8;
+  var vB9;
+  var vBA;
+  var vBB;
+  var vBC;
+  var vBD;
+  var vBE;
+  var vBF;
+  var vC0;
+  var vC1;
+  var vC2;
+  var vC3;
+  var vC4;
+  var vC5;
+  var vC6;
+  var vC7;
+  var vC8;
+  var vC9;
+  var vCA;
+  var vCB;
+  var vCC;
+  var vCD;
+  var vCE;
+  var vCF;
+  var vD0;
+  var vD1;
+  var vD2;
+  var vD3;
+  var vD4;
+  var vD5;
+  var vD6;
+  var vD7;
+  var vD8;
+  var vD9;
+  var vDA;
+  var vDB;
+  var vDC;
+  var vDD;
+  var vDE;
+  var vDF;
+  var vE0;
+  var vE1;
+  var vE2;
+  var vE3;
+  var vE4;
+  var vE5;
+  var vE6;
+  var vE7;
+  var vE8;
+  var vE9;
+  var vEA;
+  var vEB;
+  var vEC;
+  var vED;
+  var vEE;
+  var vEF;
+  var vF0;
+  var vF1;
+  var vF2;
+  var vF3;
+  var vF4;
+  var vF5;
+  var vF6;
+  var vF7;
+  var vF8;
+  var vF9;
+  var vFA;
+  var vFB;
+  var vFC;
+  var vFD;
+  var vFE;
+  var vFF;
+}