1 files changed, 55 insertions, 0 deletions
diff --git a/js/src/jit-test/lib/bytecode-cache.js b/js/src/jit-test/lib/bytecode-cache.js
new file mode 100644
index 0000000000..1f8f58643a
--- /dev/null
+++ b/js/src/jit-test/lib/bytecode-cache.js
@@ -0,0 +1,55 @@
+
+function evalWithCache(code, ctx) {
+  ctx = ctx || {};
+  ctx = Object.create(ctx, {
+    fileName: { value: "evalWithCacheCode.js" },
+    lineNumber: { value: 0 }
+  });
+  code = code instanceof Object ? code : cacheEntry(code);
+
+  var incremental = ctx.incremental || false;
+
+  // We create a new global ...
+  if (!("global" in ctx))
+      ctx.global = newGlobal({newCompartment: ctx.newCompartment});
+
+  var ctx_save = Object.create(ctx, {
+    saveIncrementalBytecode: { value: true }
+  });
+
+  // Fetch the verification function from the evaluation context.  This function
+  // is used to assert the state of the script/function after each run of the
+  // evaluate function.
+  var checkAfter = ctx.checkAfter || function(ctx) {};
+
+  // The generation counter is used to represent environment variations which
+  // might cause the program to run differently, and thus to have a different
+  // set of functions executed.
+  ctx.global.generation = 0;
+  var res1 = evaluate(code, ctx_save);
+  checkAfter(ctx);
+
+  ctx.global.generation = 1;
+  var res2 = evaluate(code, Object.create(ctx_save, {loadBytecode: { value: true } }));
+  checkAfter(ctx);
+
+  ctx.global.generation = 2;
+  var res3 = evaluate(code, Object.create(ctx, {loadBytecode: { value: true } }));
+  checkAfter(ctx);
+
+  ctx.global.generation = 3;
+  var res0 = evaluate(code, ctx);
+  checkAfter(ctx);
+
+  if (ctx.assertEqResult) {
+    assertEq(res0, res1);
+    assertEq(res0, res2);
+    assertEq(res0, res3);
+  }
+
+  if (ctx.checkFrozen) {
+    assertEq(Object.isFrozen(res0), Object.isFrozen(res1));
+    assertEq(Object.isFrozen(res0), Object.isFrozen(res2));
+    assertEq(Object.isFrozen(res0), Object.isFrozen(res3));
+  }
+}