[runtime] Make all built-in functions strict.

According to ES#sec-built-in-function-objects all built-in functions
must be strict.

This is a preliminary CL before changing the way we define built-in
functions in native JS files.

Bug: v8:6459
Change-Id: I8e60b342f04ea1b0843fe1990334cbb9b26ebac4
Reviewed-on: https://chromium-review.googlesource.com/546215Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Reviewed-by: Adam Klein <adamk@chromium.org>
Commit-Queue: Igor Sheludko <ishell@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46237}

src/bootstrapper.cc

@@ -242,9 +242,6 @@ class Genesis BASE_EMBEDDED {
 
   void MakeFunctionInstancePrototypeWritable();
 
-  void SetStrictFunctionInstanceDescriptor(Handle<Map> map,
-                                           FunctionMode function_mode);
-
   static bool CallUtilsFunction(Isolate* isolate, const char* name);
 
   static bool CompileExtension(Isolate* isolate, v8::Extension* extension);
@@ -336,17 +333,15 @@ void InstallFunction(Handle<JSObject> target, Handle<JSFunction> function,
 Handle<JSFunction> CreateFunction(Isolate* isolate, Handle<String> name,
                                   InstanceType type, int instance_size,
                                   MaybeHandle<JSObject> maybe_prototype,
-                                  Builtins::Name call,
-                                  bool strict_function_map = false) {
+                                  Builtins::Name call) {
   Factory* factory = isolate->factory();
   Handle<Code> call_code(isolate->builtins()->builtin(call));
   Handle<JSObject> prototype;
   Handle<JSFunction> result =
       maybe_prototype.ToHandle(&prototype)
           ? factory->NewFunction(name, call_code, prototype, type,
-                                 instance_size, strict_function_map)
-          : factory->NewFunctionWithoutPrototype(name, call_code,
-                                                 strict_function_map);
+                                 instance_size, true)
+          : factory->NewFunctionWithoutPrototype(name, call_code, true);
   result->shared()->set_native(true);
   return result;
 }
@@ -355,12 +350,11 @@ Handle<JSFunction> InstallFunction(Handle<JSObject> target, Handle<Name> name,
                                    InstanceType type, int instance_size,
                                    MaybeHandle<JSObject> maybe_prototype,
                                    Builtins::Name call,
-                                   PropertyAttributes attributes,
-                                   bool strict_function_map = false) {
+                                   PropertyAttributes attributes) {
   Handle<String> name_string = Name::ToFunctionName(name).ToHandleChecked();
   Handle<JSFunction> function =
       CreateFunction(target->GetIsolate(), name_string, type, instance_size,
-                     maybe_prototype, call, strict_function_map);
+                     maybe_prototype, call);
   InstallFunction(target, name, function, name_string, attributes);
   return function;
 }
@@ -368,13 +362,11 @@ Handle<JSFunction> InstallFunction(Handle<JSObject> target, Handle<Name> name,
 Handle<JSFunction> InstallFunction(Handle<JSObject> target, const char* name,
                                    InstanceType type, int instance_size,
                                    MaybeHandle<JSObject> maybe_prototype,
-                                   Builtins::Name call,
-                                   bool strict_function_map = false) {
+                                   Builtins::Name call) {
   Factory* const factory = target->GetIsolate()->factory();
   PropertyAttributes attributes = DONT_ENUM;
   return InstallFunction(target, factory->InternalizeUtf8String(name), type,
-                         instance_size, maybe_prototype, call, attributes,
-                         strict_function_map);
+                         instance_size, maybe_prototype, call, attributes);
 }
 
 Handle<JSFunction> SimpleCreateFunction(Isolate* isolate, Handle<String> name,
@@ -392,24 +384,6 @@ Handle<JSFunction> SimpleCreateFunction(Isolate* isolate, Handle<String> name,
   return fun;
 }
 
-Handle<JSFunction> InstallArrayBuiltinFunction(Handle<JSObject> base,
-                                               const char* name,
-                                               Builtins::Name call) {
-  Isolate* isolate = base->GetIsolate();
-  Handle<String> str_name = isolate->factory()->InternalizeUtf8String(name);
-  Handle<JSFunction> fun =
-      CreateFunction(isolate, str_name, JS_OBJECT_TYPE, JSObject::kHeaderSize,
-                     MaybeHandle<JSObject>(), call, true);
-  fun->shared()->set_internal_formal_parameter_count(
-      Builtins::GetBuiltinParameterCount(call));
-
-  // Set the length to 1 to satisfy ECMA-262.
-  fun->shared()->set_length(1);
-  fun->shared()->set_language_mode(STRICT);
-  InstallFunction(base, fun, str_name);
-  return fun;
-}
-
 Handle<JSFunction> SimpleInstallFunction(Handle<JSObject> base,
                                          Handle<String> name,
                                          Builtins::Name call, int len,
@@ -1487,8 +1461,7 @@ void Genesis::InitializeGlobal(Handle<JSGlobalObject> global_object,
     native_context()->set_initial_array_prototype(*array_prototype);
 
     Handle<JSFunction> is_arraylike = SimpleInstallFunction(
-        array_function, isolate->factory()->InternalizeUtf8String("isArray"),
-        Builtins::kArrayIsArray, 1, true);
+        array_function, "isArray", Builtins::kArrayIsArray, 1, true);
     native_context()->set_is_arraylike(*is_arraylike);
   }
 
@@ -3607,11 +3580,9 @@ void Bootstrapper::ExportFromRuntime(Isolate* isolate,
         container, factory->InternalizeUtf8String("GeneratorFunctionPrototype"),
         generator_function_prototype, NONE);
 
-    static const bool kUseStrictFunctionMap = true;
     Handle<JSFunction> generator_function_function = InstallFunction(
         container, "GeneratorFunction", JS_FUNCTION_TYPE, JSFunction::kSize,
-        generator_function_prototype, Builtins::kGeneratorFunctionConstructor,
-        kUseStrictFunctionMap);
+        generator_function_prototype, Builtins::kGeneratorFunctionConstructor);
     generator_function_function->set_prototype_or_initial_map(
         native_context->generator_function_map());
     generator_function_function->shared()->DontAdaptArguments();
@@ -3638,11 +3609,10 @@ void Bootstrapper::ExportFromRuntime(Isolate* isolate,
     Handle<JSObject> async_generator_function_prototype(
         iter.GetCurrent<JSObject>());
 
-    static const bool kUseStrictFunctionMap = true;
-    Handle<JSFunction> async_generator_function_function = InstallFunction(
-        container, "AsyncGeneratorFunction", JS_FUNCTION_TYPE,
-        JSFunction::kSize, async_generator_function_prototype,
-        Builtins::kAsyncGeneratorFunctionConstructor, kUseStrictFunctionMap);
+    Handle<JSFunction> async_generator_function_function =
+        InstallFunction(container, "AsyncGeneratorFunction", JS_FUNCTION_TYPE,
+                        JSFunction::kSize, async_generator_function_prototype,
+                        Builtins::kAsyncGeneratorFunctionConstructor);
     async_generator_function_function->set_prototype_or_initial_map(
         native_context->async_generator_function_map());
     async_generator_function_function->shared()->DontAdaptArguments();
@@ -3820,11 +3790,9 @@ void Bootstrapper::ExportFromRuntime(Isolate* isolate,
     PrototypeIterator iter(native_context->async_function_map());
     Handle<JSObject> async_function_prototype(iter.GetCurrent<JSObject>());
 
-    static const bool kUseStrictFunctionMap = true;
     Handle<JSFunction> async_function_constructor = InstallFunction(
         container, "AsyncFunction", JS_FUNCTION_TYPE, JSFunction::kSize,
-        async_function_prototype, Builtins::kAsyncFunctionConstructor,
-        kUseStrictFunctionMap);
+        async_function_prototype, Builtins::kAsyncFunctionConstructor);
     async_function_constructor->set_prototype_or_initial_map(
         native_context->async_function_map());
     async_function_constructor->shared()->DontAdaptArguments();
@@ -4408,43 +4376,17 @@ bool Genesis::InstallNatives(GlobalContextType context_type) {
     // on Array.prototype and below.
     proto->set_elements(heap()->empty_fixed_array());
 
-    // Install Array.prototype.concat
-    Handle<JSFunction> concat =
-        InstallFunction(proto, "concat", JS_OBJECT_TYPE, JSObject::kHeaderSize,
-                        MaybeHandle<JSObject>(), Builtins::kArrayConcat);
-
-    // Make sure that Array.prototype.concat appears to be compiled.
-    // The code will never be called, but inline caching for call will
-    // only work if it appears to be compiled.
-    concat->shared()->DontAdaptArguments();
-    DCHECK(concat->is_compiled());
-    // Set the lengths for the functions to satisfy ECMA-262.
-    concat->shared()->set_length(1);
-
-    // Install Array.prototype.forEach
-    Handle<JSFunction> forEach =
-        InstallArrayBuiltinFunction(proto, "forEach", Builtins::kArrayForEach);
-    // Add forEach to the context.
-    native_context()->set_array_for_each_iterator(*forEach);
-
-    // Install Array.prototype.filter
-    InstallArrayBuiltinFunction(proto, "filter", Builtins::kArrayFilter);
-
-    // Install Array.prototype.map
-    InstallArrayBuiltinFunction(proto, "map", Builtins::kArrayMap);
-
-    // Install Array.prototype.every
-    InstallArrayBuiltinFunction(proto, "every", Builtins::kArrayEvery);
-
-    // Install Array.prototype.some
-    InstallArrayBuiltinFunction(proto, "some", Builtins::kArraySome);
-
-    // Install Array.prototype.reduce
-    InstallArrayBuiltinFunction(proto, "reduce", Builtins::kArrayReduce);
-
-    // Install Array.prototype.reduceRight
-    InstallArrayBuiltinFunction(proto, "reduceRight",
-                                Builtins::kArrayReduceRight);
+    SimpleInstallFunction(proto, "concat", Builtins::kArrayConcat, 1, false);
+    Handle<JSFunction> for_each = SimpleInstallFunction(
+        proto, "forEach", Builtins::kArrayForEach, 1, false);
+    native_context()->set_array_for_each_iterator(*for_each);
+    SimpleInstallFunction(proto, "filter", Builtins::kArrayFilter, 1, false);
+    SimpleInstallFunction(proto, "map", Builtins::kArrayMap, 1, false);
+    SimpleInstallFunction(proto, "every", Builtins::kArrayEvery, 1, false);
+    SimpleInstallFunction(proto, "some", Builtins::kArraySome, 1, false);
+    SimpleInstallFunction(proto, "reduce", Builtins::kArrayReduce, 1, false);
+    SimpleInstallFunction(proto, "reduceRight", Builtins::kArrayReduceRight, 1,
+                          false);
   }
 
   // Install InternalArray.prototype.concat
@@ -4452,17 +4394,7 @@ bool Genesis::InstallNatives(GlobalContextType context_type) {
     Handle<JSFunction> array_constructor(
         native_context()->internal_array_function());
     Handle<JSObject> proto(JSObject::cast(array_constructor->prototype()));
-    Handle<JSFunction> concat =
-        InstallFunction(proto, "concat", JS_OBJECT_TYPE, JSObject::kHeaderSize,
-                        MaybeHandle<JSObject>(), Builtins::kArrayConcat);
-
-    // Make sure that InternalArray.prototype.concat appears to be compiled.
-    // The code will never be called, but inline caching for call will
-    // only work if it appears to be compiled.
-    concat->shared()->DontAdaptArguments();
-    DCHECK(concat->is_compiled());
-    // Set the lengths for the functions to satisfy ECMA-262.
-    concat->shared()->set_length(1);
+    SimpleInstallFunction(proto, "concat", Builtins::kArrayConcat, 1, false);
   }
 
   InstallBuiltinFunctionIds();

src/factory.cc

@@ -1486,6 +1486,7 @@ Handle<JSFunction> Factory::NewFunction(Handle<Map> map,
   Handle<Context> context(isolate()->native_context());
   Handle<SharedFunctionInfo> info =
       NewSharedFunctionInfo(name, code, map->is_constructor());
+  // Proper language mode in shared function info will be set outside.
   DCHECK(is_sloppy(info->language_mode()));
   DCHECK(!map->IsUndefined(isolate()));
   DCHECK(
@@ -1504,8 +1505,10 @@ Handle<JSFunction> Factory::NewFunction(Handle<Map> map,
 
 
 Handle<JSFunction> Factory::NewFunction(Handle<String> name) {
-  return NewFunction(
-      isolate()->sloppy_function_map(), name, MaybeHandle<Code>());
+  Handle<JSFunction> result =
+      NewFunction(isolate()->sloppy_function_map(), name, MaybeHandle<Code>());
+  DCHECK(is_sloppy(result->shared()->language_mode()));
+  return result;
 }
 
 
@@ -1515,7 +1518,9 @@ Handle<JSFunction> Factory::NewFunctionWithoutPrototype(Handle<String> name,
   Handle<Map> map = is_strict
                         ? isolate()->strict_function_without_prototype_map()
                         : isolate()->sloppy_function_without_prototype_map();
-  return NewFunction(map, name, code);
+  Handle<JSFunction> result = NewFunction(map, name, code);
+  result->shared()->set_language_mode(is_strict ? STRICT : SLOPPY);
+  return result;
 }
 
 
@@ -1526,6 +1531,7 @@ Handle<JSFunction> Factory::NewFunction(Handle<String> name, Handle<Code> code,
                               : isolate()->sloppy_function_map();
   Handle<JSFunction> result = NewFunction(map, name, code);
   result->set_prototype_or_initial_map(*prototype);
+  result->shared()->set_language_mode(is_strict ? STRICT : SLOPPY);
   return result;
 }
 

src/js/collection.js

@@ -3,6 +3,7 @@
 // found in the LICENSE file.
 
 (function(global, utils) {
+
 "use strict";
 
 %CheckIsBootstrapping();

src/js/max-min.js

@@ -4,6 +4,8 @@
 
 (function(global, utils) {
 
+"use strict";
+
 %CheckIsBootstrapping();
 
 function MaxSimple(a, b) {

src/js/messages.js

@@ -6,6 +6,8 @@
 
 (function(global, utils) {
 
+"use strict";
+
 %CheckIsBootstrapping();
 
 // -------------------------------------------------------------------

src/js/spread.js

@@ -4,7 +4,7 @@
 
 (function(global, utils) {
 
-'use strict';
+"use strict";
 
 // -------------------------------------------------------------------
 // Imports

src/js/string.js

@@ -4,6 +4,8 @@
 
 (function(global, utils) {
 
+"use strict";
+
 %CheckIsBootstrapping();
 
 // -------------------------------------------------------------------

src/js/v8natives.js

@@ -4,6 +4,8 @@
 
 (function(global, utils) {
 
+"use strict";
+
 %CheckIsBootstrapping();
 
 // ----------------------------------------------------------------------------

test/mjsunit/function-caller.js

@@ -46,11 +46,9 @@ f(null);
 // Check called from eval.
 eval('f(null)');
 
-// Check called from strict builtin functions.
+// Check called from builtin functions.
 [null, null].sort(f);
 [null].forEach(f, null);
-
-// Check called from sloppy builtin functions.
 "abel".replace(/b/g, function h() {
-   assertEquals(String.prototype.replace, h.caller);
+   assertEquals(null, h.caller);
 });

test/mjsunit/fuzz-accessors.js

@@ -26,7 +26,11 @@
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 var builtInPropertyNames = [
-  'prototype', 'length', 'caller', 0, 1, '$1', 'arguments', 'name', 'message', 'constructor'
+  'prototype', 'length', 0, 1, '$1', 'name', 'message', 'constructor'
+];
+
+var builtInPropertyNamesMayThrow = [
+  'caller', 'arguments'
 ];
 
 function getAnException() {
@@ -77,6 +81,13 @@ function runTest(fun) {
         var propertyName = builtInPropertyNames[k];
         fun(obj, propertyName);
       }
+      for (var k in builtInPropertyNamesMayThrow) {
+        var propertyName = builtInPropertyNamesMayThrow[k];
+        try {
+          fun(obj, propertyName);
+        } catch (e) {
+        }
+      }
     }
   }
 }

test/mjsunit/harmony/async-from-sync-iterator.js

@@ -625,6 +625,11 @@ if (testFailed) {
 }
 
 (function ExtractedAsyncFromSyncIteratorMethods() {
+  // TODO(ishell, caitp): Rewrite the test without using function.caller.
+  // According to ES#sec-built-in-function-objects all built-in functions
+  // must be strict. And ES#sec-forbidden-extensions states that the value of
+  // a function.caller must not be a strict function.
+  return;
   // Async-from-Sync iterator methods can be extracted via function.caller.
   // TODO(caitp): test extracted `throw` method using yield* in async generator.
   let extractor = [0, 1, 2, 3, 4,5,6,7,8,9];

test/mjsunit/regress/regress-682349.js

@@ -6,7 +6,7 @@
 
 let success = false;
 function f() {
-  success = (f.caller.arguments === null);
+  success = (f.caller === null);
 }
 Promise.resolve().then(f);
 %RunMicrotasks();

test/mjsunit/test-native-method-names.js

@@ -12,6 +12,9 @@ function CheckMethodEx(object, prop_name, function_name, length) {
   assertTrue(desc.configurable);
   assertTrue(desc.writable);
   assertThrows(() => new desc.value());
+  // Check that built-in function is strict.
+  assertThrows(() => desc.value.arguments);
+  assertThrows(() => desc.value.caller);
 }
 
 function CheckMethod(object, name, length) {
@@ -32,6 +35,9 @@ function CheckGetter(object, name) {
   assertEquals(0, desc.get.length);
   assertFalse(desc.enumerable);
   assertTrue(desc.configurable);
+  // Check that built-in function is strict.
+  assertThrows(() => desc.get.arguments);
+  assertThrows(() => desc.get.caller);
 }