bytecode-cache.js - mozsearch

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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 collectDelazifications = ctx.collectDelazifications || false;

  // We create a new global ...

  if (!("global" in ctx))

      ctx.global = newGlobal({newCompartment: ctx.newCompartment});

  var ctx_save = Object.create(ctx, {

    saveBytecodeWithDelazifications: { 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));