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"use strict";
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Object.defineProperty(exports, "__esModule", {
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value: true
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});
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exports.moduleContextFromModuleAST = moduleContextFromModuleAST;
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exports.ModuleContext = void 0;
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var _ast = require("@webassemblyjs/ast");
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function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
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function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } }
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function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); return Constructor; }
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function moduleContextFromModuleAST(m) {
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var moduleContext = new ModuleContext();
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if (!(m.type === "Module")) {
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throw new Error('m.type === "Module"' + " error: " + (undefined || "unknown"));
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}
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m.fields.forEach(function (field) {
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switch (field.type) {
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case "Start":
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{
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moduleContext.setStart(field.index);
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break;
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}
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case "TypeInstruction":
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{
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moduleContext.addType(field);
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break;
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}
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case "Func":
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{
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moduleContext.addFunction(field);
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break;
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}
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case "Global":
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{
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moduleContext.defineGlobal(field);
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break;
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}
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case "ModuleImport":
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{
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switch (field.descr.type) {
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case "GlobalType":
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{
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moduleContext.importGlobal(field.descr.valtype, field.descr.mutability);
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break;
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}
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case "Memory":
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{
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moduleContext.addMemory(field.descr.limits.min, field.descr.limits.max);
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break;
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}
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case "FuncImportDescr":
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{
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moduleContext.importFunction(field.descr);
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break;
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}
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case "Table":
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{
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// FIXME(sven): not implemented yet
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break;
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}
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default:
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throw new Error("Unsupported ModuleImport of type " + JSON.stringify(field.descr.type));
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}
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break;
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}
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case "Memory":
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{
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moduleContext.addMemory(field.limits.min, field.limits.max);
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break;
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}
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}
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});
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return moduleContext;
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}
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/**
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* Module context for type checking
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*/
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var ModuleContext =
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/*#__PURE__*/
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function () {
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function ModuleContext() {
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_classCallCheck(this, ModuleContext);
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this.funcs = [];
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this.funcsOffsetByIdentifier = [];
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this.types = [];
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this.globals = [];
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this.globalsOffsetByIdentifier = [];
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this.mems = []; // Current stack frame
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this.locals = [];
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this.labels = [];
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this.return = [];
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this.debugName = "unknown";
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this.start = null;
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}
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/**
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* Set start segment
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*/
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_createClass(ModuleContext, [{
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key: "setStart",
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value: function setStart(index) {
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this.start = index.value;
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}
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/**
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* Get start function
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*/
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}, {
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key: "getStart",
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value: function getStart() {
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return this.start;
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}
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/**
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* Reset the active stack frame
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*/
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}, {
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key: "newContext",
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value: function newContext(debugName, expectedResult) {
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this.locals = [];
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this.labels = [expectedResult];
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this.return = expectedResult;
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this.debugName = debugName;
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}
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/**
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* Functions
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*/
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}, {
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key: "addFunction",
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value: function addFunction(func
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/*: Func*/
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) {
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// eslint-disable-next-line prefer-const
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var _ref = func.signature || {},
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_ref$params = _ref.params,
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args = _ref$params === void 0 ? [] : _ref$params,
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_ref$results = _ref.results,
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result = _ref$results === void 0 ? [] : _ref$results;
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args = args.map(function (arg) {
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return arg.valtype;
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});
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this.funcs.push({
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args: args,
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result: result
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});
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if (typeof func.name !== "undefined") {
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this.funcsOffsetByIdentifier[func.name.value] = this.funcs.length - 1;
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}
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}
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}, {
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key: "importFunction",
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value: function importFunction(funcimport) {
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if ((0, _ast.isSignature)(funcimport.signature)) {
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// eslint-disable-next-line prefer-const
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var _funcimport$signature = funcimport.signature,
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args = _funcimport$signature.params,
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result = _funcimport$signature.results;
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args = args.map(function (arg) {
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return arg.valtype;
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});
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this.funcs.push({
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args: args,
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result: result
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});
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} else {
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if (!(0, _ast.isNumberLiteral)(funcimport.signature)) {
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throw new Error('isNumberLiteral(funcimport.signature)' + " error: " + (undefined || "unknown"));
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}
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var typeId = funcimport.signature.value;
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if (!this.hasType(typeId)) {
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throw new Error('this.hasType(typeId)' + " error: " + (undefined || "unknown"));
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}
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var signature = this.getType(typeId);
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this.funcs.push({
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args: signature.params.map(function (arg) {
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return arg.valtype;
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}),
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result: signature.results
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});
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}
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if (typeof funcimport.id !== "undefined") {
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// imports are first, we can assume their index in the array
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this.funcsOffsetByIdentifier[funcimport.id.value] = this.funcs.length - 1;
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}
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}
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}, {
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key: "hasFunction",
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value: function hasFunction(index) {
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return typeof this.getFunction(index) !== "undefined";
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}
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}, {
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key: "getFunction",
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value: function getFunction(index) {
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if (typeof index !== "number") {
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throw new Error("getFunction only supported for number index");
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}
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return this.funcs[index];
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}
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}, {
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key: "getFunctionOffsetByIdentifier",
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value: function getFunctionOffsetByIdentifier(name) {
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if (!(typeof name === "string")) {
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throw new Error('typeof name === "string"' + " error: " + (undefined || "unknown"));
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}
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return this.funcsOffsetByIdentifier[name];
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}
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/**
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* Labels
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*/
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}, {
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key: "addLabel",
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value: function addLabel(result) {
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this.labels.unshift(result);
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}
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}, {
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key: "hasLabel",
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value: function hasLabel(index) {
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return this.labels.length > index && index >= 0;
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}
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}, {
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key: "getLabel",
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value: function getLabel(index) {
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return this.labels[index];
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}
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}, {
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key: "popLabel",
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value: function popLabel() {
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this.labels.shift();
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}
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/**
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* Locals
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*/
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}, {
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key: "hasLocal",
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value: function hasLocal(index) {
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return typeof this.getLocal(index) !== "undefined";
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}
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}, {
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key: "getLocal",
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value: function getLocal(index) {
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return this.locals[index];
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}
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}, {
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key: "addLocal",
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value: function addLocal(type) {
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this.locals.push(type);
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281
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}
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282
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/**
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283
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* Types
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284
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*/
|
285
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|
286
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}, {
|
287
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key: "addType",
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288
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value: function addType(type) {
|
289
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if (!(type.functype.type === "Signature")) {
|
290
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throw new Error('type.functype.type === "Signature"' + " error: " + (undefined || "unknown"));
|
291
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}
|
292
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|
293
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this.types.push(type.functype);
|
294
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}
|
295
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}, {
|
296
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key: "hasType",
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value: function hasType(index) {
|
298
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return this.types[index] !== undefined;
|
299
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}
|
300
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}, {
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301
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key: "getType",
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302
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value: function getType(index) {
|
303
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return this.types[index];
|
304
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}
|
305
|
/**
|
306
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* Globals
|
307
|
*/
|
308
|
|
309
|
}, {
|
310
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key: "hasGlobal",
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311
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value: function hasGlobal(index) {
|
312
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return this.globals.length > index && index >= 0;
|
313
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}
|
314
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}, {
|
315
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key: "getGlobal",
|
316
|
value: function getGlobal(index) {
|
317
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return this.globals[index].type;
|
318
|
}
|
319
|
}, {
|
320
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key: "getGlobalOffsetByIdentifier",
|
321
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value: function getGlobalOffsetByIdentifier(name) {
|
322
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if (!(typeof name === "string")) {
|
323
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throw new Error('typeof name === "string"' + " error: " + (undefined || "unknown"));
|
324
|
}
|
325
|
|
326
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return this.globalsOffsetByIdentifier[name];
|
327
|
}
|
328
|
}, {
|
329
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key: "defineGlobal",
|
330
|
value: function defineGlobal(global
|
331
|
/*: Global*/
|
332
|
) {
|
333
|
var type = global.globalType.valtype;
|
334
|
var mutability = global.globalType.mutability;
|
335
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this.globals.push({
|
336
|
type: type,
|
337
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mutability: mutability
|
338
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});
|
339
|
|
340
|
if (typeof global.name !== "undefined") {
|
341
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this.globalsOffsetByIdentifier[global.name.value] = this.globals.length - 1;
|
342
|
}
|
343
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}
|
344
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}, {
|
345
|
key: "importGlobal",
|
346
|
value: function importGlobal(type, mutability) {
|
347
|
this.globals.push({
|
348
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type: type,
|
349
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mutability: mutability
|
350
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});
|
351
|
}
|
352
|
}, {
|
353
|
key: "isMutableGlobal",
|
354
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value: function isMutableGlobal(index) {
|
355
|
return this.globals[index].mutability === "var";
|
356
|
}
|
357
|
}, {
|
358
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key: "isImmutableGlobal",
|
359
|
value: function isImmutableGlobal(index) {
|
360
|
return this.globals[index].mutability === "const";
|
361
|
}
|
362
|
/**
|
363
|
* Memories
|
364
|
*/
|
365
|
|
366
|
}, {
|
367
|
key: "hasMemory",
|
368
|
value: function hasMemory(index) {
|
369
|
return this.mems.length > index && index >= 0;
|
370
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}
|
371
|
}, {
|
372
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key: "addMemory",
|
373
|
value: function addMemory(min, max) {
|
374
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this.mems.push({
|
375
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min: min,
|
376
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max: max
|
377
|
});
|
378
|
}
|
379
|
}, {
|
380
|
key: "getMemory",
|
381
|
value: function getMemory(index) {
|
382
|
return this.mems[index];
|
383
|
}
|
384
|
}]);
|
385
|
|
386
|
return ModuleContext;
|
387
|
}();
|
388
|
|
389
|
exports.ModuleContext = ModuleContext;
|