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authorGravatar Piotr Russ <mail@pruss.it> 2020-11-16 00:10:28 +0100
committerGravatar Piotr Russ <mail@pruss.it> 2020-11-16 00:10:28 +0100
commite06ec920f7a5d784e674c4c4b4e6d1da3dc7391d (patch)
tree55713f725f77b44ebfec86e4eec3ce33e71458ca /node_modules/@webassemblyjs/helper-module-context/lib
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-rw-r--r--node_modules/@webassemblyjs/helper-module-context/lib/index.js389
1 files changed, 389 insertions, 0 deletions
diff --git a/node_modules/@webassemblyjs/helper-module-context/lib/index.js b/node_modules/@webassemblyjs/helper-module-context/lib/index.js
new file mode 100644
index 0000000..189e719
--- /dev/null
+++ b/node_modules/@webassemblyjs/helper-module-context/lib/index.js
@@ -0,0 +1,389 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+ value: true
+});
+exports.moduleContextFromModuleAST = moduleContextFromModuleAST;
+exports.ModuleContext = void 0;
+
+var _ast = require("@webassemblyjs/ast");
+
+function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
+
+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); } }
+
+function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); return Constructor; }
+
+function moduleContextFromModuleAST(m) {
+ var moduleContext = new ModuleContext();
+
+ if (!(m.type === "Module")) {
+ throw new Error('m.type === "Module"' + " error: " + (undefined || "unknown"));
+ }
+
+ m.fields.forEach(function (field) {
+ switch (field.type) {
+ case "Start":
+ {
+ moduleContext.setStart(field.index);
+ break;
+ }
+
+ case "TypeInstruction":
+ {
+ moduleContext.addType(field);
+ break;
+ }
+
+ case "Func":
+ {
+ moduleContext.addFunction(field);
+ break;
+ }
+
+ case "Global":
+ {
+ moduleContext.defineGlobal(field);
+ break;
+ }
+
+ case "ModuleImport":
+ {
+ switch (field.descr.type) {
+ case "GlobalType":
+ {
+ moduleContext.importGlobal(field.descr.valtype, field.descr.mutability);
+ break;
+ }
+
+ case "Memory":
+ {
+ moduleContext.addMemory(field.descr.limits.min, field.descr.limits.max);
+ break;
+ }
+
+ case "FuncImportDescr":
+ {
+ moduleContext.importFunction(field.descr);
+ break;
+ }
+
+ case "Table":
+ {
+ // FIXME(sven): not implemented yet
+ break;
+ }
+
+ default:
+ throw new Error("Unsupported ModuleImport of type " + JSON.stringify(field.descr.type));
+ }
+
+ break;
+ }
+
+ case "Memory":
+ {
+ moduleContext.addMemory(field.limits.min, field.limits.max);
+ break;
+ }
+ }
+ });
+ return moduleContext;
+}
+/**
+ * Module context for type checking
+ */
+
+
+var ModuleContext =
+/*#__PURE__*/
+function () {
+ function ModuleContext() {
+ _classCallCheck(this, ModuleContext);
+
+ this.funcs = [];
+ this.funcsOffsetByIdentifier = [];
+ this.types = [];
+ this.globals = [];
+ this.globalsOffsetByIdentifier = [];
+ this.mems = []; // Current stack frame
+
+ this.locals = [];
+ this.labels = [];
+ this.return = [];
+ this.debugName = "unknown";
+ this.start = null;
+ }
+ /**
+ * Set start segment
+ */
+
+
+ _createClass(ModuleContext, [{
+ key: "setStart",
+ value: function setStart(index) {
+ this.start = index.value;
+ }
+ /**
+ * Get start function
+ */
+
+ }, {
+ key: "getStart",
+ value: function getStart() {
+ return this.start;
+ }
+ /**
+ * Reset the active stack frame
+ */
+
+ }, {
+ key: "newContext",
+ value: function newContext(debugName, expectedResult) {
+ this.locals = [];
+ this.labels = [expectedResult];
+ this.return = expectedResult;
+ this.debugName = debugName;
+ }
+ /**
+ * Functions
+ */
+
+ }, {
+ key: "addFunction",
+ value: function addFunction(func
+ /*: Func*/
+ ) {
+ // eslint-disable-next-line prefer-const
+ var _ref = func.signature || {},
+ _ref$params = _ref.params,
+ args = _ref$params === void 0 ? [] : _ref$params,
+ _ref$results = _ref.results,
+ result = _ref$results === void 0 ? [] : _ref$results;
+
+ args = args.map(function (arg) {
+ return arg.valtype;
+ });
+ this.funcs.push({
+ args: args,
+ result: result
+ });
+
+ if (typeof func.name !== "undefined") {
+ this.funcsOffsetByIdentifier[func.name.value] = this.funcs.length - 1;
+ }
+ }
+ }, {
+ key: "importFunction",
+ value: function importFunction(funcimport) {
+ if ((0, _ast.isSignature)(funcimport.signature)) {
+ // eslint-disable-next-line prefer-const
+ var _funcimport$signature = funcimport.signature,
+ args = _funcimport$signature.params,
+ result = _funcimport$signature.results;
+ args = args.map(function (arg) {
+ return arg.valtype;
+ });
+ this.funcs.push({
+ args: args,
+ result: result
+ });
+ } else {
+ if (!(0, _ast.isNumberLiteral)(funcimport.signature)) {
+ throw new Error('isNumberLiteral(funcimport.signature)' + " error: " + (undefined || "unknown"));
+ }
+
+ var typeId = funcimport.signature.value;
+
+ if (!this.hasType(typeId)) {
+ throw new Error('this.hasType(typeId)' + " error: " + (undefined || "unknown"));
+ }
+
+ var signature = this.getType(typeId);
+ this.funcs.push({
+ args: signature.params.map(function (arg) {
+ return arg.valtype;
+ }),
+ result: signature.results
+ });
+ }
+
+ if (typeof funcimport.id !== "undefined") {
+ // imports are first, we can assume their index in the array
+ this.funcsOffsetByIdentifier[funcimport.id.value] = this.funcs.length - 1;
+ }
+ }
+ }, {
+ key: "hasFunction",
+ value: function hasFunction(index) {
+ return typeof this.getFunction(index) !== "undefined";
+ }
+ }, {
+ key: "getFunction",
+ value: function getFunction(index) {
+ if (typeof index !== "number") {
+ throw new Error("getFunction only supported for number index");
+ }
+
+ return this.funcs[index];
+ }
+ }, {
+ key: "getFunctionOffsetByIdentifier",
+ value: function getFunctionOffsetByIdentifier(name) {
+ if (!(typeof name === "string")) {
+ throw new Error('typeof name === "string"' + " error: " + (undefined || "unknown"));
+ }
+
+ return this.funcsOffsetByIdentifier[name];
+ }
+ /**
+ * Labels
+ */
+
+ }, {
+ key: "addLabel",
+ value: function addLabel(result) {
+ this.labels.unshift(result);
+ }
+ }, {
+ key: "hasLabel",
+ value: function hasLabel(index) {
+ return this.labels.length > index && index >= 0;
+ }
+ }, {
+ key: "getLabel",
+ value: function getLabel(index) {
+ return this.labels[index];
+ }
+ }, {
+ key: "popLabel",
+ value: function popLabel() {
+ this.labels.shift();
+ }
+ /**
+ * Locals
+ */
+
+ }, {
+ key: "hasLocal",
+ value: function hasLocal(index) {
+ return typeof this.getLocal(index) !== "undefined";
+ }
+ }, {
+ key: "getLocal",
+ value: function getLocal(index) {
+ return this.locals[index];
+ }
+ }, {
+ key: "addLocal",
+ value: function addLocal(type) {
+ this.locals.push(type);
+ }
+ /**
+ * Types
+ */
+
+ }, {
+ key: "addType",
+ value: function addType(type) {
+ if (!(type.functype.type === "Signature")) {
+ throw new Error('type.functype.type === "Signature"' + " error: " + (undefined || "unknown"));
+ }
+
+ this.types.push(type.functype);
+ }
+ }, {
+ key: "hasType",
+ value: function hasType(index) {
+ return this.types[index] !== undefined;
+ }
+ }, {
+ key: "getType",
+ value: function getType(index) {
+ return this.types[index];
+ }
+ /**
+ * Globals
+ */
+
+ }, {
+ key: "hasGlobal",
+ value: function hasGlobal(index) {
+ return this.globals.length > index && index >= 0;
+ }
+ }, {
+ key: "getGlobal",
+ value: function getGlobal(index) {
+ return this.globals[index].type;
+ }
+ }, {
+ key: "getGlobalOffsetByIdentifier",
+ value: function getGlobalOffsetByIdentifier(name) {
+ if (!(typeof name === "string")) {
+ throw new Error('typeof name === "string"' + " error: " + (undefined || "unknown"));
+ }
+
+ return this.globalsOffsetByIdentifier[name];
+ }
+ }, {
+ key: "defineGlobal",
+ value: function defineGlobal(global
+ /*: Global*/
+ ) {
+ var type = global.globalType.valtype;
+ var mutability = global.globalType.mutability;
+ this.globals.push({
+ type: type,
+ mutability: mutability
+ });
+
+ if (typeof global.name !== "undefined") {
+ this.globalsOffsetByIdentifier[global.name.value] = this.globals.length - 1;
+ }
+ }
+ }, {
+ key: "importGlobal",
+ value: function importGlobal(type, mutability) {
+ this.globals.push({
+ type: type,
+ mutability: mutability
+ });
+ }
+ }, {
+ key: "isMutableGlobal",
+ value: function isMutableGlobal(index) {
+ return this.globals[index].mutability === "var";
+ }
+ }, {
+ key: "isImmutableGlobal",
+ value: function isImmutableGlobal(index) {
+ return this.globals[index].mutability === "const";
+ }
+ /**
+ * Memories
+ */
+
+ }, {
+ key: "hasMemory",
+ value: function hasMemory(index) {
+ return this.mems.length > index && index >= 0;
+ }
+ }, {
+ key: "addMemory",
+ value: function addMemory(min, max) {
+ this.mems.push({
+ min: min,
+ max: max
+ });
+ }
+ }, {
+ key: "getMemory",
+ value: function getMemory(index) {
+ return this.mems[index];
+ }
+ }]);
+
+ return ModuleContext;
+}();
+
+exports.ModuleContext = ModuleContext; \ No newline at end of file