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; }
|
|
// TODO(sven): add flow in here
|
import { isSignature, isNumberLiteral } from "@webassemblyjs/ast";
|
export 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
|
*/
|
|
export 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 (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 (!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;
|
}();
|
