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Unified Diff: pkg/compiler/lib/src/js_emitter/old_emitter/reflection_data_parser.dart

Issue 693183006: Revert "Move dart2js from sdk/lib/_internal/compiler to pkg/compiler" (Closed) Base URL: https://dart.googlecode.com/svn/branches/bleeding_edge/dart
Patch Set: Created 6 years, 1 month ago
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Index: pkg/compiler/lib/src/js_emitter/old_emitter/reflection_data_parser.dart
diff --git a/pkg/compiler/lib/src/js_emitter/old_emitter/reflection_data_parser.dart b/pkg/compiler/lib/src/js_emitter/old_emitter/reflection_data_parser.dart
deleted file mode 100644
index a1d3610313a000087529643d0c114996f2b51616..0000000000000000000000000000000000000000
--- a/pkg/compiler/lib/src/js_emitter/old_emitter/reflection_data_parser.dart
+++ /dev/null
@@ -1,409 +0,0 @@
-// Copyright (c) 2013, 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.
-
-part of dart2js.js_emitter;
-
-// TODO(ahe): Share these with js_helper.dart.
-const FUNCTION_INDEX = 0;
-const NAME_INDEX = 1;
-const CALL_NAME_INDEX = 2;
-const REQUIRED_PARAMETER_INDEX = 3;
-const OPTIONAL_PARAMETER_INDEX = 4;
-const DEFAULT_ARGUMENTS_INDEX = 5;
-
-const bool VALIDATE_DATA = false;
-
-// TODO(ahe): This code should be integrated in CodeEmitterTask.finishClasses.
-jsAst.Expression getReflectionDataParser(String classesCollector,
- JavaScriptBackend backend) {
- Namer namer = backend.namer;
- Compiler compiler = backend.compiler;
- CodeEmitterTask emitter = backend.emitter;
-
- String metadataField = '"${namer.metadataField}"';
- String reflectableField = namer.reflectableField;
-
- // TODO(ahe): Move this string constants to namer.
- String reflectionInfoField = r'$reflectionInfo';
- String reflectionNameField = r'$reflectionName';
- String metadataIndexField = r'$metadataIndex';
-
- String defaultValuesField = namer.defaultValuesField;
- String methodsWithOptionalArgumentsField =
- namer.methodsWithOptionalArgumentsField;
-
- String unmangledNameIndex = backend.mustRetainMetadata
- ? ' 3 * optionalParameterCount + 2 * requiredParameterCount + 3'
- : ' 2 * optionalParameterCount + requiredParameterCount + 3';
-
- jsAst.Expression typeInformationAccess =
- emitter.generateEmbeddedGlobalAccess(embeddedNames.TYPE_INFORMATION);
- jsAst.Expression globalFunctionsAccess =
- emitter.generateEmbeddedGlobalAccess(embeddedNames.GLOBAL_FUNCTIONS);
- jsAst.Expression staticsAccess =
- emitter.generateEmbeddedGlobalAccess(embeddedNames.STATICS);
- jsAst.Expression interceptedNamesAccess =
- emitter.generateEmbeddedGlobalAccess(embeddedNames.INTERCEPTED_NAMES);
- jsAst.Expression mangledGlobalNamesAccess =
- emitter.generateEmbeddedGlobalAccess(embeddedNames.MANGLED_GLOBAL_NAMES);
- jsAst.Expression mangledNamesAccess =
- emitter.generateEmbeddedGlobalAccess(embeddedNames.MANGLED_NAMES);
- jsAst.Expression librariesAccess =
- emitter.generateEmbeddedGlobalAccess(embeddedNames.LIBRARIES);
-
- jsAst.Statement header = js.statement('''
-// [map] returns an object literal that V8 shouldn not try to optimize with a
-// hidden class. This prevents a potential performance problem where V8 tries
-// to build a hidden class for an object used as a hashMap.
-// It requires fewer characters to declare a variable as a parameter than
-// with `var`.
- function map(x){x=Object.create(null);x.x=0;delete x.x;return x}
-''');
-
- jsAst.Statement processStatics = js.statement('''
- function processStatics(descriptor) {
- for (var property in descriptor) {
- if (!hasOwnProperty.call(descriptor, property)) continue;
- if (property === "${namer.classDescriptorProperty}") continue;
- var element = descriptor[property];
- var firstChar = property.substring(0, 1);
- var previousProperty;
- if (firstChar === "+") {
- mangledGlobalNames[previousProperty] = property.substring(1);
- var flag = descriptor[property];
- if (flag > 0)
- descriptor[previousProperty].$reflectableField = flag;
- if (element && element.length)
- #[previousProperty] = element; // embedded typeInformation.
- } else if (firstChar === "@") {
- property = property.substring(1);
- ${namer.currentIsolate}[property][$metadataField] = element;
- } else if (firstChar === "*") {
- globalObject[previousProperty].$defaultValuesField = element;
- var optionalMethods = descriptor.$methodsWithOptionalArgumentsField;
- if (!optionalMethods) {
- descriptor.$methodsWithOptionalArgumentsField = optionalMethods = {}
- }
- optionalMethods[property] = previousProperty;
- } else if (typeof element === "function") {
- globalObject[previousProperty = property] = element;
- functions.push(property);
- #[property] = element; // embedded globalFunctions.
- } else if (element.constructor === Array) {
- addStubs(globalObject, element, property,
- true, descriptor, functions);
- } else {
- previousProperty = property;
- var newDesc = {};
- var previousProp;
- for (var prop in element) {
- if (!hasOwnProperty.call(element, prop)) continue;
- firstChar = prop.substring(0, 1);
- if (prop === "static") {
- processStatics(#[property] = element[prop]); // embedded statics.
- } else if (firstChar === "+") {
- mangledNames[previousProp] = prop.substring(1);
- var flag = element[prop];
- if (flag > 0)
- element[previousProp].$reflectableField = flag;
- } else if (firstChar === "@" && prop !== "@") {
- newDesc[prop.substring(1)][$metadataField] = element[prop];
- } else if (firstChar === "*") {
- newDesc[previousProp].$defaultValuesField = element[prop];
- var optionalMethods = newDesc.$methodsWithOptionalArgumentsField;
- if (!optionalMethods) {
- newDesc.$methodsWithOptionalArgumentsField = optionalMethods={}
- }
- optionalMethods[prop] = previousProp;
- } else {
- var elem = element[prop];
- if (prop !== "${namer.classDescriptorProperty}" &&
- elem != null &&
- elem.constructor === Array &&
- prop !== "<>") {
- addStubs(newDesc, elem, prop, false, element, []);
- } else {
- newDesc[previousProp = prop] = elem;
- }
- }
- }
- $classesCollector[property] = [globalObject, newDesc];
- classes.push(property);
- }
- }
- }
-''', [typeInformationAccess, globalFunctionsAccess, staticsAccess]);
-
-
- /**
- * See [dart2js.js_emitter.ContainerBuilder.addMemberMethod] for format of
- * [array].
- */
- jsAst.Statement addStubs = js.statement('''
- function addStubs(descriptor, array, name, isStatic,
- originalDescriptor, functions) {
- var f, funcs =
- [originalDescriptor[name] =
- descriptor[name] = f = ${readFunction("array", "$FUNCTION_INDEX")}];
- f.\$stubName = name;
- functions.push(name);
- for (var index = $FUNCTION_INDEX; index < array.length; index += 2) {
- f = array[index + 1];
- if (typeof f != "function") break;
- f.\$stubName = ${readString("array", "index + 2")};
- funcs.push(f);
- if (f.\$stubName) {
- originalDescriptor[f.\$stubName] = descriptor[f.\$stubName] = f;
- functions.push(f.\$stubName);
- }
- }
- for (var i = 0; i < funcs.length; index++, i++) {
- funcs[i].\$callName = ${readString("array", "index + 1")};
- }
- var getterStubName = ${readString("array", "++index")};
- array = array.slice(++index);
- var requiredParameterInfo = ${readInt("array", "0")};
- var requiredParameterCount = requiredParameterInfo >> 1;
- var isAccessor = (requiredParameterInfo & 1) === 1;
- var isSetter = requiredParameterInfo === 3;
- var isGetter = requiredParameterInfo === 1;
- var optionalParameterInfo = ${readInt("array", "1")};
- var optionalParameterCount = optionalParameterInfo >> 1;
- var optionalParametersAreNamed = (optionalParameterInfo & 1) === 1;
- var isIntercepted =
- requiredParameterCount + optionalParameterCount != funcs[0].length;
- var functionTypeIndex = ${readFunctionType("array", "2")};
- var unmangledNameIndex = $unmangledNameIndex;
- var isReflectable = array.length > unmangledNameIndex;
-
- if (getterStubName) {
- f = tearOff(funcs, array, isStatic, name, isIntercepted);
- descriptor[name].\$getter = f;
- f.\$getterStub = true;
- // Used to create an isolate using spawnFunction.
- if (isStatic) #[name] = f; // embedded globalFunctions.
- originalDescriptor[getterStubName] = descriptor[getterStubName] = f;
- funcs.push(f);
- if (getterStubName) functions.push(getterStubName);
- f.\$stubName = getterStubName;
- f.\$callName = null;
- if (isIntercepted) #[getterStubName] = true; // embedded interceptedNames.
- }
- if (isReflectable) {
- for (var i = 0; i < funcs.length; i++) {
- funcs[i].$reflectableField = 1;
- funcs[i].$reflectionInfoField = array;
- }
- var mangledNames = isStatic ? # : #; // embedded mangledGlobalNames, mangledNames
- var unmangledName = ${readString("array", "unmangledNameIndex")};
- // The function is either a getter, a setter, or a method.
- // If it is a method, it might also have a tear-off closure.
- // The unmangledName is the same as the getter-name.
- var reflectionName = unmangledName;
- if (getterStubName) mangledNames[getterStubName] = reflectionName;
- if (isSetter) {
- reflectionName += "=";
- } else if (!isGetter) {
- reflectionName += ":" + requiredParameterCount +
- ":" + optionalParameterCount;
- }
- mangledNames[name] = reflectionName;
- funcs[0].$reflectionNameField = reflectionName;
- funcs[0].$metadataIndexField = unmangledNameIndex + 1;
- if (optionalParameterCount) descriptor[unmangledName + "*"] = funcs[0];
- }
- }
-''', [globalFunctionsAccess, interceptedNamesAccess,
- mangledGlobalNamesAccess, mangledNamesAccess]);
-
- List<jsAst.Statement> tearOffCode = buildTearOffCode(backend);
-
- jsAst.Statement init = js.statement('''{
- var functionCounter = 0;
- var tearOffGetter = (typeof dart_precompiled == "function")
- ? tearOffGetterCsp : tearOffGetterNoCsp;
- if (!#) # = []; // embedded libraries.
- if (!#) # = map(); // embedded mangledNames.
- if (!#) # = map(); // embedded mangledGlobalNames.
- if (!#) # = map(); // embedded statics.
- if (!#) # = map(); // embedded typeInformation.
- if (!#) # = map(); // embedded globalFunctions.
- if (!#) # = map(); // embedded interceptedNames.
- var libraries = #; // embeded libraries.
- var mangledNames = #; // embedded mangledNames.
- var mangledGlobalNames = #; // embedded mangledGlobalNames.
- var hasOwnProperty = Object.prototype.hasOwnProperty;
- var length = reflectionData.length;
- for (var i = 0; i < length; i++) {
- var data = reflectionData[i];
-
-// [data] contains these elements:
-// 0. The library name (not unique).
-// 1. The library URI (unique).
-// 2. A function returning the metadata associated with this library.
-// 3. The global object to use for this library.
-// 4. An object literal listing the members of the library.
-// 5. This element is optional and if present it is true and signals that this
-// library is the root library (see dart:mirrors IsolateMirror.rootLibrary).
-//
-// The entries of [data] are built in [assembleProgram] above.
-
- var name = data[0];
- var uri = data[1];
- var metadata = data[2];
- var globalObject = data[3];
- var descriptor = data[4];
- var isRoot = !!data[5];
- var fields = descriptor && descriptor["${namer.classDescriptorProperty}"];
- if (fields instanceof Array) fields = fields[0];
- var classes = [];
- var functions = [];
- processStatics(descriptor);
- libraries.push([name, uri, classes, functions, metadata, fields, isRoot,
- globalObject]);
- }
-}''', [librariesAccess, librariesAccess,
- mangledNamesAccess, mangledNamesAccess,
- mangledGlobalNamesAccess, mangledGlobalNamesAccess,
- staticsAccess, staticsAccess,
- typeInformationAccess, typeInformationAccess,
- globalFunctionsAccess, globalFunctionsAccess,
- interceptedNamesAccess, interceptedNamesAccess,
- librariesAccess,
- mangledNamesAccess,
- mangledGlobalNamesAccess]);
-
- return js('''
-(function (reflectionData) {
- "use strict";
- #; // header
- #; // processStatics
- #; // addStubs
- #; // tearOffCode
- #; // init
-})''', [header, processStatics, addStubs, tearOffCode, init]);
-}
-
-
-List<jsAst.Statement> buildTearOffCode(JavaScriptBackend backend) {
- Namer namer = backend.namer;
- Compiler compiler = backend.compiler;
-
- Element closureFromTearOff = backend.findHelper('closureFromTearOff');
- String tearOffAccessText;
- jsAst.Expression tearOffAccessExpression;
- String tearOffGlobalObjectName;
- String tearOffGlobalObject;
- if (closureFromTearOff != null) {
- // We need both the AST that references [closureFromTearOff] and a string
- // for the NoCsp version that constructs a function.
- tearOffAccessExpression = namer.elementAccess(closureFromTearOff);
- tearOffAccessText =
- jsAst.prettyPrint(tearOffAccessExpression, compiler).getText();
- tearOffGlobalObjectName = tearOffGlobalObject =
- namer.globalObjectFor(closureFromTearOff);
- } else {
- // Default values for mocked-up test libraries.
- tearOffAccessText =
- r'''function() { throw 'Helper \'closureFromTearOff\' missing.' }''';
- tearOffAccessExpression = js(tearOffAccessText);
- tearOffGlobalObjectName = 'MissingHelperFunction';
- tearOffGlobalObject = '($tearOffAccessText())';
- }
-
- // This template is uncached because it is constructed from code fragments
- // that can change from compilation to compilation. Some of these could be
- // avoided, except for the string literals that contain the compiled access
- // path to 'closureFromTearOff'.
- jsAst.Statement tearOffGetterNoCsp = js.uncachedStatementTemplate('''
- function tearOffGetterNoCsp(funcs, reflectionInfo, name, isIntercepted) {
- return isIntercepted
- ? new Function("funcs", "reflectionInfo", "name",
- "$tearOffGlobalObjectName", "c",
- "return function tearOff_" + name + (functionCounter++)+ "(x) {" +
- "if (c === null) c = $tearOffAccessText(" +
- "this, funcs, reflectionInfo, false, [x], name);" +
- "return new c(this, funcs[0], x, name);" +
- "}")(funcs, reflectionInfo, name, $tearOffGlobalObject, null)
- : new Function("funcs", "reflectionInfo", "name",
- "$tearOffGlobalObjectName", "c",
- "return function tearOff_" + name + (functionCounter++)+ "() {" +
- "if (c === null) c = $tearOffAccessText(" +
- "this, funcs, reflectionInfo, false, [], name);" +
- "return new c(this, funcs[0], null, name);" +
- "}")(funcs, reflectionInfo, name, $tearOffGlobalObject, null);
- }''').instantiate([]);
-
- jsAst.Statement tearOffGetterCsp = js.statement('''
- function tearOffGetterCsp(funcs, reflectionInfo, name, isIntercepted) {
- var cache = null;
- return isIntercepted
- ? function(x) {
- if (cache === null) cache = #(
- this, funcs, reflectionInfo, false, [x], name);
- return new cache(this, funcs[0], x, name);
- }
- : function() {
- if (cache === null) cache = #(
- this, funcs, reflectionInfo, false, [], name);
- return new cache(this, funcs[0], null, name);
- };
- }''', [tearOffAccessExpression, tearOffAccessExpression]);
-
- jsAst.Statement tearOff = js.statement('''
- function tearOff(funcs, reflectionInfo, isStatic, name, isIntercepted) {
- var cache;
- return isStatic
- ? function() {
- if (cache === void 0) cache = #(
- this, funcs, reflectionInfo, true, [], name).prototype;
- return cache;
- }
- : tearOffGetter(funcs, reflectionInfo, name, isIntercepted);
- }''', tearOffAccessExpression);
-
- return <jsAst.Statement>[tearOffGetterNoCsp, tearOffGetterCsp, tearOff];
-}
-
-
-String readString(String array, String index) {
- return readChecked(
- array, index, 'result != null && typeof result != "string"', 'string');
-}
-
-String readInt(String array, String index) {
- return readChecked(
- array, index,
- 'result != null && (typeof result != "number" || (result|0) !== result)',
- 'int');
-}
-
-String readFunction(String array, String index) {
- return readChecked(
- array, index, 'result != null && typeof result != "function"',
- 'function');
-}
-
-String readFunctionType(String array, String index) {
- return readChecked(
- array, index,
- 'result != null && '
- '(typeof result != "number" || (result|0) !== result) && '
- 'typeof result != "function"',
- 'function or int');
-}
-
-String readChecked(String array, String index, String check, String type) {
- if (!VALIDATE_DATA) return '$array[$index]';
- return '''
-(function() {
- var result = $array[$index];
- if ($check) {
- throw new Error(
- name + ": expected value of type \'$type\' at index " + ($index) +
- " but got " + (typeof result));
- }
- return result;
-})()''';
-}

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