Add tests for TCO with eval and cross-realm cases

test/language/expressions/call/tco-cross-realm-class-construct.js

@@ -0,0 +1,39 @@
+// Copyright (C) 2017 André Bargull. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+id: sec-function-calls-runtime-semantics-evaluation
+info: >
+  Check TypeError is thrown from correct realm with tco-call to class constructor from derived
+  class [[Construct]] invocation.
+description: |
+  12.3.4.3 Runtime Semantics: EvaluateDirectCall( func, thisValue, arguments, tailPosition )
+    ...
+    4. If tailPosition is true, perform PrepareForTailCall().
+    5. Let result be Call(func, thisValue, argList).
+    6. Assert: If tailPosition is true, the above call will not return here, but instead evaluation will continue as if the following return has already occurred.
+    7. Assert: If result is not an abrupt completion, then Type(result) is an ECMAScript language type.
+    8. Return result.
+
+  9.2.1 [[Call]] ( thisArgument, argumentsList)
+    ...
+    2. If F.[[FunctionKind]] is "classConstructor", throw a TypeError exception.
+    3. Let callerContext be the running execution context.
+    4. Let calleeContext be PrepareForOrdinaryCall(F, undefined).
+    5. Assert: calleeContext is now the running execution context.
+    ...
+
+features: [tail-call-optimization, class]
+---*/
+
+// - The class constructor call is in a valid tail-call position, which means PrepareForTailCall is performed.
+// - The function call returns from `otherRealm` and proceeds the tail-call in this realm.
+// - Calling the class constructor throws a TypeError from the current realm, that means this realm and not `otherRealm`.
+var code = "(class { constructor() { return (class {})(); } });";
+
+var otherRealm = $262.createRealm();
+var tco = otherRealm.evalScript(code);
+
+assert.throws(TypeError, function() {
+  new tco();
+});

test/language/expressions/call/tco-cross-realm-class-derived-construct.js

@@ -0,0 +1,39 @@
+// Copyright (C) 2017 André Bargull. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+id: sec-function-calls-runtime-semantics-evaluation
+info: >
+  Check TypeError is thrown from correct realm with tco-call to class constructor from
+  class [[Construct]] invocation.
+description: |
+  12.3.4.3 Runtime Semantics: EvaluateDirectCall( func, thisValue, arguments, tailPosition )
+    ...
+    4. If tailPosition is true, perform PrepareForTailCall().
+    5. Let result be Call(func, thisValue, argList).
+    6. Assert: If tailPosition is true, the above call will not return here, but instead evaluation will continue as if the following return has already occurred.
+    7. Assert: If result is not an abrupt completion, then Type(result) is an ECMAScript language type.
+    8. Return result.
+
+  9.2.1 [[Call]] ( thisArgument, argumentsList)
+    ...
+    2. If F.[[FunctionKind]] is "classConstructor", throw a TypeError exception.
+    3. Let callerContext be the running execution context.
+    4. Let calleeContext be PrepareForOrdinaryCall(F, undefined).
+    5. Assert: calleeContext is now the running execution context.
+    ...
+
+features: [tail-call-optimization, class]
+---*/
+
+// - The class constructor call is in a valid tail-call position, which means PrepareForTailCall is performed.
+// - The function call returns from `otherRealm` and proceeds the tail-call in this realm.
+// - Calling the class constructor throws a TypeError from the current realm, that means this realm and not `otherRealm`.
+var code = "(class extends Object { constructor() { return (class {})(); } });";
+
+var otherRealm = $262.createRealm();
+var tco = otherRealm.evalScript(code);
+
+assert.throws(TypeError, function() {
+  new tco();
+});

test/language/expressions/call/tco-cross-realm-fun-call.js

@@ -0,0 +1,38 @@
+// Copyright (C) 2017 André Bargull. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+id: sec-function-calls-runtime-semantics-evaluation
+info: >
+  Check TypeError is thrown from correct realm with tco-call to class constructor from [[Call]] invocation.
+description: |
+  12.3.4.3 Runtime Semantics: EvaluateDirectCall( func, thisValue, arguments, tailPosition )
+    ...
+    4. If tailPosition is true, perform PrepareForTailCall().
+    5. Let result be Call(func, thisValue, argList).
+    6. Assert: If tailPosition is true, the above call will not return here, but instead evaluation will continue as if the following return has already occurred.
+    7. Assert: If result is not an abrupt completion, then Type(result) is an ECMAScript language type.
+    8. Return result.
+
+  9.2.1 [[Call]] ( thisArgument, argumentsList)
+    ...
+    2. If F.[[FunctionKind]] is "classConstructor", throw a TypeError exception.
+    3. Let callerContext be the running execution context.
+    4. Let calleeContext be PrepareForOrdinaryCall(F, undefined).
+    5. Assert: calleeContext is now the running execution context.
+    ...
+
+features: [tail-call-optimization, class]
+---*/
+
+// - The class constructor call is in a valid tail-call position, which means PrepareForTailCall is performed.
+// - The function call returns from `otherRealm` and proceeds the tail-call in this realm.
+// - Calling the class constructor throws a TypeError from the current realm, that means this realm and not `otherRealm`.
+var code = "'use strict'; (function() { return (class {})(); });";
+
+var otherRealm = $262.createRealm();
+var tco = otherRealm.evalScript(code);
+
+assert.throws(TypeError, function() {
+  tco();
+});

test/language/expressions/call/tco-cross-realm-fun-construct.js

@@ -0,0 +1,38 @@
+// Copyright (C) 2017 André Bargull. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+id: sec-function-calls-runtime-semantics-evaluation
+info: >
+  Check TypeError is thrown from correct realm with tco-call to class constructor from [[Construct]] invocation.
+description: |
+  12.3.4.3 Runtime Semantics: EvaluateDirectCall( func, thisValue, arguments, tailPosition )
+    ...
+    4. If tailPosition is true, perform PrepareForTailCall().
+    5. Let result be Call(func, thisValue, argList).
+    6. Assert: If tailPosition is true, the above call will not return here, but instead evaluation will continue as if the following return has already occurred.
+    7. Assert: If result is not an abrupt completion, then Type(result) is an ECMAScript language type.
+    8. Return result.
+
+  9.2.1 [[Call]] ( thisArgument, argumentsList)
+    ...
+    2. If F.[[FunctionKind]] is "classConstructor", throw a TypeError exception.
+    3. Let callerContext be the running execution context.
+    4. Let calleeContext be PrepareForOrdinaryCall(F, undefined).
+    5. Assert: calleeContext is now the running execution context.
+    ...
+
+features: [tail-call-optimization, class]
+---*/
+
+// - The class constructor call is in a valid tail-call position, which means PrepareForTailCall is performed.
+// - The function call returns from `otherRealm` and proceeds the tail-call in this realm.
+// - Calling the class constructor throws a TypeError from the current realm, that means this realm and not `otherRealm`.
+var code = "'use strict'; (function() { return (class {})(); });";
+
+var otherRealm = $262.createRealm();
+var tco = otherRealm.evalScript(code);
+
+assert.throws(TypeError, function() {
+  new tco();
+});

test/language/expressions/call/tco-non-eval-function-dynamic.js

@@ -0,0 +1,44 @@
+// Copyright (C) 2017 André Bargull. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+id: sec-function-calls-runtime-semantics-evaluation
+info: >
+  Tail-call with identifier named "eval" in function environment, local "eval" binding dynamically added.
+description: |
+  12.3.4.1 Runtime Semantics: Evaluation
+    ...
+    6. If Type(ref) is Reference and IsPropertyReference(ref) is false and
+       GetReferencedName(ref) is "eval", then
+      a. If SameValue(func, %eval%) is true, then
+        ...
+    ...
+    9. Return ? EvaluateCall(func, ref, arguments, tailCall).
+
+  12.3.4.2 Runtime Semantics: EvaluateCall( func, ref, arguments, tailPosition )
+    ...
+    7. If tailPosition is true, perform PrepareForTailCall().
+    8. Let result be Call(func, thisValue, argList).
+    ...
+
+flags: [noStrict]
+features: [tail-call-optimization]
+includes: [tcoHelper.js]
+---*/
+
+var callCount = 0;
+
+(function() {
+  function f(n) {
+    "use strict";
+    if (n === 0) {
+      callCount += 1
+      return;
+    }
+    return eval(n - 1);
+  }
+  eval("var eval = f;");
+  f($MAX_ITERATIONS);
+})();
+
+assert.sameValue(callCount, 1);

test/language/expressions/call/tco-non-eval-function.js

@@ -0,0 +1,44 @@
+// Copyright (C) 2017 André Bargull. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+id: sec-function-calls-runtime-semantics-evaluation
+info: >
+  Tail-call with identifier named "eval" in function environment.
+description: |
+  12.3.4.1 Runtime Semantics: Evaluation
+    ...
+    6. If Type(ref) is Reference and IsPropertyReference(ref) is false and
+       GetReferencedName(ref) is "eval", then
+      a. If SameValue(func, %eval%) is true, then
+        ...
+    ...
+    9. Return ? EvaluateCall(func, ref, arguments, tailCall).
+
+  12.3.4.2 Runtime Semantics: EvaluateCall( func, ref, arguments, tailPosition )
+    ...
+    7. If tailPosition is true, perform PrepareForTailCall().
+    8. Let result be Call(func, thisValue, argList).
+    ...
+
+flags: [noStrict]
+features: [tail-call-optimization]
+includes: [tcoHelper.js]
+---*/
+
+var callCount = 0;
+
+(function() {
+  function f(n) {
+    "use strict";
+    if (n === 0) {
+      callCount += 1
+      return;
+    }
+    return eval(n - 1);
+  }
+  var eval = f;
+  f($MAX_ITERATIONS);
+})();
+
+assert.sameValue(callCount, 1);

test/language/expressions/call/tco-non-eval-global.js

@@ -0,0 +1,43 @@
+// Copyright (C) 2017 André Bargull. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+id: sec-function-calls-runtime-semantics-evaluation
+info: >
+  Tail-call with identifier named "eval" in global environment.
+description: |
+  12.3.4.1 Runtime Semantics: Evaluation
+    ...
+    6. If Type(ref) is Reference and IsPropertyReference(ref) is false and
+       GetReferencedName(ref) is "eval", then
+      a. If SameValue(func, %eval%) is true, then
+        ...
+    ...
+    9. Return ? EvaluateCall(func, ref, arguments, tailCall).
+
+  12.3.4.2 Runtime Semantics: EvaluateCall( func, ref, arguments, tailPosition )
+    ...
+    7. If tailPosition is true, perform PrepareForTailCall().
+    8. Let result be Call(func, thisValue, argList).
+    ...
+
+flags: [noStrict]
+features: [tail-call-optimization]
+includes: [tcoHelper.js]
+---*/
+
+var callCount = 0;
+
+function f(n) {
+  "use strict";
+  if (n === 0) {
+    callCount += 1
+    return;
+  }
+  return eval(n - 1);
+}
+eval = f;
+
+f($MAX_ITERATIONS);
+
+assert.sameValue(callCount, 1);

test/language/expressions/call/tco-non-eval-with.js

@@ -0,0 +1,46 @@
+// Copyright (C) 2017 André Bargull. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+id: sec-function-calls-runtime-semantics-evaluation
+info: >
+  Tail-call with identifier named "eval" in object environment.
+description: |
+  12.3.4.1 Runtime Semantics: Evaluation
+    ...
+    6. If Type(ref) is Reference and IsPropertyReference(ref) is false and
+       GetReferencedName(ref) is "eval", then
+      a. If SameValue(func, %eval%) is true, then
+        ...
+    ...
+    9. Return ? EvaluateCall(func, ref, arguments, tailCall).
+
+  12.3.4.2 Runtime Semantics: EvaluateCall( func, ref, arguments, tailPosition )
+    ...
+    7. If tailPosition is true, perform PrepareForTailCall().
+    8. Let result be Call(func, thisValue, argList).
+    ...
+
+flags: [noStrict]
+features: [tail-call-optimization]
+includes: [tcoHelper.js]
+---*/
+
+var callCount = 0;
+
+var f, scope = {};
+with (scope) {
+  f = function (n) {
+    "use strict";
+    if (n === 0) {
+      callCount += 1
+      return;
+    }
+    return eval(n - 1);
+  }
+}
+scope.eval = f;
+
+f($MAX_ITERATIONS);
+
+assert.sameValue(callCount, 1);