Index: frontend/node_modules/@webassemblyjs/wasm-edit/LICENSE =================================================================== --- frontend/node_modules/@webassemblyjs/wasm-edit/LICENSE (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/@webassemblyjs/wasm-edit/LICENSE (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,21 @@ +MIT License + +Copyright (c) 2018 Sven Sauleau + +Permission is hereby granted, free of charge, to any person obtaining a copy +of this software and associated documentation files (the "Software"), to deal +in the Software without restriction, including without limitation the rights +to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +copies of the Software, and to permit persons to whom the Software is +furnished to do so, subject to the following conditions: + +The above copyright notice and this permission notice shall be included in all +copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +SOFTWARE. Index: frontend/node_modules/@webassemblyjs/wasm-edit/README.md =================================================================== --- frontend/node_modules/@webassemblyjs/wasm-edit/README.md (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/@webassemblyjs/wasm-edit/README.md (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,86 @@ +# @webassemblyjs/wasm-edit + +> Rewrite a WASM binary + +Replace in-place an AST node in the binary. + +## Installation + +```sh +yarn add @webassemblyjs/wasm-edit +``` + +## Usage + +Update: + +```js +import { edit } from "@webassemblyjs/wasm-edit"; + +const binary = [/*...*/]; + +const visitors = { + ModuleImport({ node }) { + node.module = "foo"; + node.name = "bar"; + } +}; + +const newBinary = edit(binary, visitors); +``` + +Replace: + +```js +import { edit } from "@webassemblyjs/wasm-edit"; + +const binary = [/*...*/]; + +const visitors = { + Instr(path) { + const newNode = t.callInstruction(t.indexLiteral(0)); + path.replaceWith(newNode); + } +}; + +const newBinary = edit(binary, visitors); +``` + +Remove: + +```js +import { edit } from "@webassemblyjs/wasm-edit"; + +const binary = [/*...*/]; + +const visitors = { + ModuleExport({ node }) { + path.remove() + } +}; + +const newBinary = edit(binary, visitors); +``` + +Insert: + +```js +import { add } from "@webassemblyjs/wasm-edit"; + +const binary = [/*...*/]; + +const newBinary = add(actualBinary, [ + t.moduleImport("env", "mem", t.memory(t.limit(1))) +]); +``` + +## Providing the AST + +Providing an AST allows you to handle the decoding yourself, here is the API: + +```js +addWithAST(Program, ArrayBuffer, Array): ArrayBuffer; +editWithAST(Program, ArrayBuffer, visitors): ArrayBuffer; +``` + +Note that the AST will be updated in-place. Index: frontend/node_modules/@webassemblyjs/wasm-edit/esm/apply.js =================================================================== --- frontend/node_modules/@webassemblyjs/wasm-edit/esm/apply.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/@webassemblyjs/wasm-edit/esm/apply.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,306 @@ +function _slicedToArray(arr, i) { return _arrayWithHoles(arr) || _iterableToArrayLimit(arr, i) || _unsupportedIterableToArray(arr, i) || _nonIterableRest(); } + +function _nonIterableRest() { throw new TypeError("Invalid attempt to destructure non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method."); } + +function _unsupportedIterableToArray(o, minLen) { if (!o) return; if (typeof o === "string") return _arrayLikeToArray(o, minLen); var n = Object.prototype.toString.call(o).slice(8, -1); if (n === "Object" && o.constructor) n = o.constructor.name; if (n === "Map" || n === "Set") return Array.from(o); if (n === "Arguments" || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n)) return _arrayLikeToArray(o, minLen); } + +function _arrayLikeToArray(arr, len) { if (len == null || len > arr.length) len = arr.length; for (var i = 0, arr2 = new Array(len); i < len; i++) { arr2[i] = arr[i]; } return arr2; } + +function _iterableToArrayLimit(arr, i) { var _i = arr == null ? null : typeof Symbol !== "undefined" && arr[Symbol.iterator] || arr["@@iterator"]; if (_i == null) return; var _arr = []; var _n = true; var _d = false; var _s, _e; try { for (_i = _i.call(arr); !(_n = (_s = _i.next()).done); _n = true) { _arr.push(_s.value); if (i && _arr.length === i) break; } } catch (err) { _d = true; _e = err; } finally { try { if (!_n && _i["return"] != null) _i["return"](); } finally { if (_d) throw _e; } } return _arr; } + +function _arrayWithHoles(arr) { if (Array.isArray(arr)) return arr; } + +import { encodeNode } from "@webassemblyjs/wasm-gen"; +import { encodeU32 } from "@webassemblyjs/wasm-gen/lib/encoder"; +import { isFunc, isGlobal, assertHasLoc, orderedInsertNode, getSectionMetadata, traverse, getEndOfSection } from "@webassemblyjs/ast"; +import { resizeSectionByteSize, resizeSectionVecSize, createEmptySection, removeSections } from "@webassemblyjs/helper-wasm-section"; +import { overrideBytesInBuffer } from "@webassemblyjs/helper-buffer"; +import { getSectionForNode } from "@webassemblyjs/helper-wasm-bytecode"; + +function shiftLocNodeByDelta(node, delta) { + assertHasLoc(node); // $FlowIgnore: assertHasLoc ensures that + + node.loc.start.column += delta; // $FlowIgnore: assertHasLoc ensures that + + node.loc.end.column += delta; +} + +function applyUpdate(ast, uint8Buffer, _ref) { + var _ref2 = _slicedToArray(_ref, 2), + oldNode = _ref2[0], + newNode = _ref2[1]; + + var deltaElements = 0; + assertHasLoc(oldNode); + var sectionName = getSectionForNode(newNode); + var replacementByteArray = encodeNode(newNode); + /** + * Replace new node as bytes + */ + + uint8Buffer = overrideBytesInBuffer(uint8Buffer, // $FlowIgnore: assertHasLoc ensures that + oldNode.loc.start.column, // $FlowIgnore: assertHasLoc ensures that + oldNode.loc.end.column, replacementByteArray); + /** + * Update function body size if needed + */ + + if (sectionName === "code") { + // Find the parent func + traverse(ast, { + Func: function Func(_ref3) { + var node = _ref3.node; + var funcHasThisIntr = node.body.find(function (n) { + return n === newNode; + }) !== undefined; // Update func's body size if needed + + if (funcHasThisIntr === true) { + // These are the old functions locations informations + assertHasLoc(node); + var oldNodeSize = encodeNode(oldNode).length; + var bodySizeDeltaBytes = replacementByteArray.length - oldNodeSize; + + if (bodySizeDeltaBytes !== 0) { + var newValue = node.metadata.bodySize + bodySizeDeltaBytes; + var newByteArray = encodeU32(newValue); // function body size byte + // FIXME(sven): only handles one byte u32 + + var start = node.loc.start.column; + var end = start + 1; + uint8Buffer = overrideBytesInBuffer(uint8Buffer, start, end, newByteArray); + } + } + } + }); + } + /** + * Update section size + */ + + + var deltaBytes = replacementByteArray.length - (oldNode.loc.end.column - oldNode.loc.start.column); // Init location informations + + newNode.loc = { + start: { + line: -1, + column: -1 + }, + end: { + line: -1, + column: -1 + } + }; // Update new node end position + // $FlowIgnore: assertHasLoc ensures that + + newNode.loc.start.column = oldNode.loc.start.column; // $FlowIgnore: assertHasLoc ensures that + + newNode.loc.end.column = // $FlowIgnore: assertHasLoc ensures that + oldNode.loc.start.column + replacementByteArray.length; + return { + uint8Buffer: uint8Buffer, + deltaBytes: deltaBytes, + deltaElements: deltaElements + }; +} + +function applyDelete(ast, uint8Buffer, node) { + var deltaElements = -1; // since we removed an element + + assertHasLoc(node); + var sectionName = getSectionForNode(node); + + if (sectionName === "start") { + var sectionMetadata = getSectionMetadata(ast, "start"); + /** + * The start section only contains one element, + * we need to remove the whole section + */ + + uint8Buffer = removeSections(ast, uint8Buffer, "start"); + + var _deltaBytes = -(sectionMetadata.size.value + 1); + /* section id */ + + + return { + uint8Buffer: uint8Buffer, + deltaBytes: _deltaBytes, + deltaElements: deltaElements + }; + } // replacement is nothing + + + var replacement = []; + uint8Buffer = overrideBytesInBuffer(uint8Buffer, // $FlowIgnore: assertHasLoc ensures that + node.loc.start.column, // $FlowIgnore: assertHasLoc ensures that + node.loc.end.column, replacement); + /** + * Update section + */ + // $FlowIgnore: assertHasLoc ensures that + + var deltaBytes = -(node.loc.end.column - node.loc.start.column); + return { + uint8Buffer: uint8Buffer, + deltaBytes: deltaBytes, + deltaElements: deltaElements + }; +} + +function applyAdd(ast, uint8Buffer, node) { + var deltaElements = +1; // since we added an element + + var sectionName = getSectionForNode(node); + var sectionMetadata = getSectionMetadata(ast, sectionName); // Section doesn't exists, we create an empty one + + if (typeof sectionMetadata === "undefined") { + var res = createEmptySection(ast, uint8Buffer, sectionName); + uint8Buffer = res.uint8Buffer; + sectionMetadata = res.sectionMetadata; + } + /** + * check that the expressions were ended + */ + + + if (isFunc(node)) { + // $FlowIgnore + var body = node.body; + + if (body.length === 0 || body[body.length - 1].id !== "end") { + throw new Error("expressions must be ended"); + } + } + + if (isGlobal(node)) { + // $FlowIgnore + var body = node.init; + + if (body.length === 0 || body[body.length - 1].id !== "end") { + throw new Error("expressions must be ended"); + } + } + /** + * Add nodes + */ + + + var newByteArray = encodeNode(node); // The size of the section doesn't include the storage of the size itself + // we need to manually add it here + + var start = getEndOfSection(sectionMetadata); + var end = start; + /** + * Update section + */ + + var deltaBytes = newByteArray.length; + uint8Buffer = overrideBytesInBuffer(uint8Buffer, start, end, newByteArray); + node.loc = { + start: { + line: -1, + column: start + }, + end: { + line: -1, + column: start + deltaBytes + } + }; // for func add the additional metadata in the AST + + if (node.type === "Func") { + // the size is the first byte + // FIXME(sven): handle LEB128 correctly here + var bodySize = newByteArray[0]; + node.metadata = { + bodySize: bodySize + }; + } + + if (node.type !== "IndexInFuncSection") { + orderedInsertNode(ast.body[0], node); + } + + return { + uint8Buffer: uint8Buffer, + deltaBytes: deltaBytes, + deltaElements: deltaElements + }; +} + +export function applyOperations(ast, uint8Buffer, ops) { + ops.forEach(function (op) { + var state; + var sectionName; + + switch (op.kind) { + case "update": + state = applyUpdate(ast, uint8Buffer, [op.oldNode, op.node]); + sectionName = getSectionForNode(op.node); + break; + + case "delete": + state = applyDelete(ast, uint8Buffer, op.node); + sectionName = getSectionForNode(op.node); + break; + + case "add": + state = applyAdd(ast, uint8Buffer, op.node); + sectionName = getSectionForNode(op.node); + break; + + default: + throw new Error("Unknown operation"); + } + /** + * Resize section vec size. + * If the length of the LEB-encoded size changes, this can change + * the byte length of the section and the offset for nodes in the + * section. So we do this first before resizing section byte size + * or shifting following operations' nodes. + */ + + + if (state.deltaElements !== 0 && sectionName !== "start") { + var oldBufferLength = state.uint8Buffer.length; + state.uint8Buffer = resizeSectionVecSize(ast, state.uint8Buffer, sectionName, state.deltaElements); // Infer bytes added/removed by comparing buffer lengths + + state.deltaBytes += state.uint8Buffer.length - oldBufferLength; + } + /** + * Resize section byte size. + * If the length of the LEB-encoded size changes, this can change + * the offset for nodes in the section. So we do this before + * shifting following operations' nodes. + */ + + + if (state.deltaBytes !== 0 && sectionName !== "start") { + var _oldBufferLength = state.uint8Buffer.length; + state.uint8Buffer = resizeSectionByteSize(ast, state.uint8Buffer, sectionName, state.deltaBytes); // Infer bytes added/removed by comparing buffer lengths + + state.deltaBytes += state.uint8Buffer.length - _oldBufferLength; + } + /** + * Shift following operation's nodes + */ + + + if (state.deltaBytes !== 0) { + ops.forEach(function (op) { + // We don't need to handle add ops, they are positioning independent + switch (op.kind) { + case "update": + shiftLocNodeByDelta(op.oldNode, state.deltaBytes); + break; + + case "delete": + shiftLocNodeByDelta(op.node, state.deltaBytes); + break; + } + }); + } + + uint8Buffer = state.uint8Buffer; + }); + return uint8Buffer; +} Index: frontend/node_modules/@webassemblyjs/wasm-edit/esm/index.js =================================================================== --- frontend/node_modules/@webassemblyjs/wasm-edit/esm/index.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/@webassemblyjs/wasm-edit/esm/index.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,111 @@ +function _createForOfIteratorHelper(o, allowArrayLike) { var it = typeof Symbol !== "undefined" && o[Symbol.iterator] || o["@@iterator"]; if (!it) { if (Array.isArray(o) || (it = _unsupportedIterableToArray(o)) || allowArrayLike && o && typeof o.length === "number") { if (it) o = it; var i = 0; var F = function F() {}; return { s: F, n: function n() { if (i >= o.length) return { done: true }; return { done: false, value: o[i++] }; }, e: function e(_e) { throw _e; }, f: F }; } throw new TypeError("Invalid attempt to iterate non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method."); } var normalCompletion = true, didErr = false, err; return { s: function s() { it = it.call(o); }, n: function n() { var step = it.next(); normalCompletion = step.done; return step; }, e: function e(_e2) { didErr = true; err = _e2; }, f: function f() { try { if (!normalCompletion && it["return"] != null) it["return"](); } finally { if (didErr) throw err; } } }; } + +function _unsupportedIterableToArray(o, minLen) { if (!o) return; if (typeof o === "string") return _arrayLikeToArray(o, minLen); var n = Object.prototype.toString.call(o).slice(8, -1); if (n === "Object" && o.constructor) n = o.constructor.name; if (n === "Map" || n === "Set") return Array.from(o); if (n === "Arguments" || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n)) return _arrayLikeToArray(o, minLen); } + +function _arrayLikeToArray(arr, len) { if (len == null || len > arr.length) len = arr.length; for (var i = 0, arr2 = new Array(len); i < len; i++) { arr2[i] = arr[i]; } return arr2; } + +import { decode } from "@webassemblyjs/wasm-parser"; +import { traverse } from "@webassemblyjs/ast"; +import { cloneNode } from "@webassemblyjs/ast/lib/clone"; +import { shrinkPaddedLEB128 } from "@webassemblyjs/wasm-opt"; +import { getSectionForNode } from "@webassemblyjs/helper-wasm-bytecode"; +import constants from "@webassemblyjs/helper-wasm-bytecode"; +import { applyOperations } from "./apply"; + +function hashNode(node) { + return JSON.stringify(node); +} + +function preprocess(ab) { + var optBin = shrinkPaddedLEB128(new Uint8Array(ab)); + return optBin.buffer; +} + +function sortBySectionOrder(nodes) { + var originalOrder = new Map(); + + var _iterator = _createForOfIteratorHelper(nodes), + _step; + + try { + for (_iterator.s(); !(_step = _iterator.n()).done;) { + var node = _step.value; + originalOrder.set(node, originalOrder.size); + } + } catch (err) { + _iterator.e(err); + } finally { + _iterator.f(); + } + + nodes.sort(function (a, b) { + var sectionA = getSectionForNode(a); + var sectionB = getSectionForNode(b); + var aId = constants.sections[sectionA]; + var bId = constants.sections[sectionB]; + + if (typeof aId !== "number" || typeof bId !== "number") { + throw new Error("Section id not found"); + } + + if (aId === bId) { + // $FlowIgnore originalOrder is filled for all nodes + return originalOrder.get(a) - originalOrder.get(b); + } + + return aId - bId; + }); +} + +export function edit(ab, visitors) { + ab = preprocess(ab); + var ast = decode(ab); + return editWithAST(ast, ab, visitors); +} +export function editWithAST(ast, ab, visitors) { + var operations = []; + var uint8Buffer = new Uint8Array(ab); + var nodeBefore; + + function before(type, path) { + nodeBefore = cloneNode(path.node); + } + + function after(type, path) { + if (path.node._deleted === true) { + operations.push({ + kind: "delete", + node: path.node + }); // $FlowIgnore + } else if (hashNode(nodeBefore) !== hashNode(path.node)) { + operations.push({ + kind: "update", + oldNode: nodeBefore, + node: path.node + }); + } + } + + traverse(ast, visitors, before, after); + uint8Buffer = applyOperations(ast, uint8Buffer, operations); + return uint8Buffer.buffer; +} +export function add(ab, newNodes) { + ab = preprocess(ab); + var ast = decode(ab); + return addWithAST(ast, ab, newNodes); +} +export function addWithAST(ast, ab, newNodes) { + // Sort nodes by insertion order + sortBySectionOrder(newNodes); + var uint8Buffer = new Uint8Array(ab); // Map node into operations + + var operations = newNodes.map(function (n) { + return { + kind: "add", + node: n + }; + }); + uint8Buffer = applyOperations(ast, uint8Buffer, operations); + return uint8Buffer.buffer; +} Index: frontend/node_modules/@webassemblyjs/wasm-edit/lib/apply.js =================================================================== --- frontend/node_modules/@webassemblyjs/wasm-edit/lib/apply.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/@webassemblyjs/wasm-edit/lib/apply.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,318 @@ +"use strict"; + +Object.defineProperty(exports, "__esModule", { + value: true +}); +exports.applyOperations = applyOperations; + +var _wasmGen = require("@webassemblyjs/wasm-gen"); + +var _encoder = require("@webassemblyjs/wasm-gen/lib/encoder"); + +var _ast = require("@webassemblyjs/ast"); + +var _helperWasmSection = require("@webassemblyjs/helper-wasm-section"); + +var _helperBuffer = require("@webassemblyjs/helper-buffer"); + +var _helperWasmBytecode = require("@webassemblyjs/helper-wasm-bytecode"); + +function _slicedToArray(arr, i) { return _arrayWithHoles(arr) || _iterableToArrayLimit(arr, i) || _unsupportedIterableToArray(arr, i) || _nonIterableRest(); } + +function _nonIterableRest() { throw new TypeError("Invalid attempt to destructure non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method."); } + +function _unsupportedIterableToArray(o, minLen) { if (!o) return; if (typeof o === "string") return _arrayLikeToArray(o, minLen); var n = Object.prototype.toString.call(o).slice(8, -1); if (n === "Object" && o.constructor) n = o.constructor.name; if (n === "Map" || n === "Set") return Array.from(o); if (n === "Arguments" || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n)) return _arrayLikeToArray(o, minLen); } + +function _arrayLikeToArray(arr, len) { if (len == null || len > arr.length) len = arr.length; for (var i = 0, arr2 = new Array(len); i < len; i++) { arr2[i] = arr[i]; } return arr2; } + +function _iterableToArrayLimit(arr, i) { var _i = arr == null ? null : typeof Symbol !== "undefined" && arr[Symbol.iterator] || arr["@@iterator"]; if (_i == null) return; var _arr = []; var _n = true; var _d = false; var _s, _e; try { for (_i = _i.call(arr); !(_n = (_s = _i.next()).done); _n = true) { _arr.push(_s.value); if (i && _arr.length === i) break; } } catch (err) { _d = true; _e = err; } finally { try { if (!_n && _i["return"] != null) _i["return"](); } finally { if (_d) throw _e; } } return _arr; } + +function _arrayWithHoles(arr) { if (Array.isArray(arr)) return arr; } + +function shiftLocNodeByDelta(node, delta) { + (0, _ast.assertHasLoc)(node); // $FlowIgnore: assertHasLoc ensures that + + node.loc.start.column += delta; // $FlowIgnore: assertHasLoc ensures that + + node.loc.end.column += delta; +} + +function applyUpdate(ast, uint8Buffer, _ref) { + var _ref2 = _slicedToArray(_ref, 2), + oldNode = _ref2[0], + newNode = _ref2[1]; + + var deltaElements = 0; + (0, _ast.assertHasLoc)(oldNode); + var sectionName = (0, _helperWasmBytecode.getSectionForNode)(newNode); + var replacementByteArray = (0, _wasmGen.encodeNode)(newNode); + /** + * Replace new node as bytes + */ + + uint8Buffer = (0, _helperBuffer.overrideBytesInBuffer)(uint8Buffer, // $FlowIgnore: assertHasLoc ensures that + oldNode.loc.start.column, // $FlowIgnore: assertHasLoc ensures that + oldNode.loc.end.column, replacementByteArray); + /** + * Update function body size if needed + */ + + if (sectionName === "code") { + // Find the parent func + (0, _ast.traverse)(ast, { + Func: function Func(_ref3) { + var node = _ref3.node; + var funcHasThisIntr = node.body.find(function (n) { + return n === newNode; + }) !== undefined; // Update func's body size if needed + + if (funcHasThisIntr === true) { + // These are the old functions locations informations + (0, _ast.assertHasLoc)(node); + var oldNodeSize = (0, _wasmGen.encodeNode)(oldNode).length; + var bodySizeDeltaBytes = replacementByteArray.length - oldNodeSize; + + if (bodySizeDeltaBytes !== 0) { + var newValue = node.metadata.bodySize + bodySizeDeltaBytes; + var newByteArray = (0, _encoder.encodeU32)(newValue); // function body size byte + // FIXME(sven): only handles one byte u32 + + var start = node.loc.start.column; + var end = start + 1; + uint8Buffer = (0, _helperBuffer.overrideBytesInBuffer)(uint8Buffer, start, end, newByteArray); + } + } + } + }); + } + /** + * Update section size + */ + + + var deltaBytes = replacementByteArray.length - (oldNode.loc.end.column - oldNode.loc.start.column); // Init location informations + + newNode.loc = { + start: { + line: -1, + column: -1 + }, + end: { + line: -1, + column: -1 + } + }; // Update new node end position + // $FlowIgnore: assertHasLoc ensures that + + newNode.loc.start.column = oldNode.loc.start.column; // $FlowIgnore: assertHasLoc ensures that + + newNode.loc.end.column = // $FlowIgnore: assertHasLoc ensures that + oldNode.loc.start.column + replacementByteArray.length; + return { + uint8Buffer: uint8Buffer, + deltaBytes: deltaBytes, + deltaElements: deltaElements + }; +} + +function applyDelete(ast, uint8Buffer, node) { + var deltaElements = -1; // since we removed an element + + (0, _ast.assertHasLoc)(node); + var sectionName = (0, _helperWasmBytecode.getSectionForNode)(node); + + if (sectionName === "start") { + var sectionMetadata = (0, _ast.getSectionMetadata)(ast, "start"); + /** + * The start section only contains one element, + * we need to remove the whole section + */ + + uint8Buffer = (0, _helperWasmSection.removeSections)(ast, uint8Buffer, "start"); + + var _deltaBytes = -(sectionMetadata.size.value + 1); + /* section id */ + + + return { + uint8Buffer: uint8Buffer, + deltaBytes: _deltaBytes, + deltaElements: deltaElements + }; + } // replacement is nothing + + + var replacement = []; + uint8Buffer = (0, _helperBuffer.overrideBytesInBuffer)(uint8Buffer, // $FlowIgnore: assertHasLoc ensures that + node.loc.start.column, // $FlowIgnore: assertHasLoc ensures that + node.loc.end.column, replacement); + /** + * Update section + */ + // $FlowIgnore: assertHasLoc ensures that + + var deltaBytes = -(node.loc.end.column - node.loc.start.column); + return { + uint8Buffer: uint8Buffer, + deltaBytes: deltaBytes, + deltaElements: deltaElements + }; +} + +function applyAdd(ast, uint8Buffer, node) { + var deltaElements = +1; // since we added an element + + var sectionName = (0, _helperWasmBytecode.getSectionForNode)(node); + var sectionMetadata = (0, _ast.getSectionMetadata)(ast, sectionName); // Section doesn't exists, we create an empty one + + if (typeof sectionMetadata === "undefined") { + var res = (0, _helperWasmSection.createEmptySection)(ast, uint8Buffer, sectionName); + uint8Buffer = res.uint8Buffer; + sectionMetadata = res.sectionMetadata; + } + /** + * check that the expressions were ended + */ + + + if ((0, _ast.isFunc)(node)) { + // $FlowIgnore + var body = node.body; + + if (body.length === 0 || body[body.length - 1].id !== "end") { + throw new Error("expressions must be ended"); + } + } + + if ((0, _ast.isGlobal)(node)) { + // $FlowIgnore + var body = node.init; + + if (body.length === 0 || body[body.length - 1].id !== "end") { + throw new Error("expressions must be ended"); + } + } + /** + * Add nodes + */ + + + var newByteArray = (0, _wasmGen.encodeNode)(node); // The size of the section doesn't include the storage of the size itself + // we need to manually add it here + + var start = (0, _ast.getEndOfSection)(sectionMetadata); + var end = start; + /** + * Update section + */ + + var deltaBytes = newByteArray.length; + uint8Buffer = (0, _helperBuffer.overrideBytesInBuffer)(uint8Buffer, start, end, newByteArray); + node.loc = { + start: { + line: -1, + column: start + }, + end: { + line: -1, + column: start + deltaBytes + } + }; // for func add the additional metadata in the AST + + if (node.type === "Func") { + // the size is the first byte + // FIXME(sven): handle LEB128 correctly here + var bodySize = newByteArray[0]; + node.metadata = { + bodySize: bodySize + }; + } + + if (node.type !== "IndexInFuncSection") { + (0, _ast.orderedInsertNode)(ast.body[0], node); + } + + return { + uint8Buffer: uint8Buffer, + deltaBytes: deltaBytes, + deltaElements: deltaElements + }; +} + +function applyOperations(ast, uint8Buffer, ops) { + ops.forEach(function (op) { + var state; + var sectionName; + + switch (op.kind) { + case "update": + state = applyUpdate(ast, uint8Buffer, [op.oldNode, op.node]); + sectionName = (0, _helperWasmBytecode.getSectionForNode)(op.node); + break; + + case "delete": + state = applyDelete(ast, uint8Buffer, op.node); + sectionName = (0, _helperWasmBytecode.getSectionForNode)(op.node); + break; + + case "add": + state = applyAdd(ast, uint8Buffer, op.node); + sectionName = (0, _helperWasmBytecode.getSectionForNode)(op.node); + break; + + default: + throw new Error("Unknown operation"); + } + /** + * Resize section vec size. + * If the length of the LEB-encoded size changes, this can change + * the byte length of the section and the offset for nodes in the + * section. So we do this first before resizing section byte size + * or shifting following operations' nodes. + */ + + + if (state.deltaElements !== 0 && sectionName !== "start") { + var oldBufferLength = state.uint8Buffer.length; + state.uint8Buffer = (0, _helperWasmSection.resizeSectionVecSize)(ast, state.uint8Buffer, sectionName, state.deltaElements); // Infer bytes added/removed by comparing buffer lengths + + state.deltaBytes += state.uint8Buffer.length - oldBufferLength; + } + /** + * Resize section byte size. + * If the length of the LEB-encoded size changes, this can change + * the offset for nodes in the section. So we do this before + * shifting following operations' nodes. + */ + + + if (state.deltaBytes !== 0 && sectionName !== "start") { + var _oldBufferLength = state.uint8Buffer.length; + state.uint8Buffer = (0, _helperWasmSection.resizeSectionByteSize)(ast, state.uint8Buffer, sectionName, state.deltaBytes); // Infer bytes added/removed by comparing buffer lengths + + state.deltaBytes += state.uint8Buffer.length - _oldBufferLength; + } + /** + * Shift following operation's nodes + */ + + + if (state.deltaBytes !== 0) { + ops.forEach(function (op) { + // We don't need to handle add ops, they are positioning independent + switch (op.kind) { + case "update": + shiftLocNodeByDelta(op.oldNode, state.deltaBytes); + break; + + case "delete": + shiftLocNodeByDelta(op.node, state.deltaBytes); + break; + } + }); + } + + uint8Buffer = state.uint8Buffer; + }); + return uint8Buffer; +} Index: frontend/node_modules/@webassemblyjs/wasm-edit/lib/index.js =================================================================== --- frontend/node_modules/@webassemblyjs/wasm-edit/lib/index.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/@webassemblyjs/wasm-edit/lib/index.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,134 @@ +"use strict"; + +function _typeof(obj) { "@babel/helpers - typeof"; if (typeof Symbol === "function" && typeof Symbol.iterator === "symbol") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; }; } return _typeof(obj); } + +Object.defineProperty(exports, "__esModule", { + value: true +}); +exports.edit = edit; +exports.editWithAST = editWithAST; +exports.add = add; +exports.addWithAST = addWithAST; + +var _wasmParser = require("@webassemblyjs/wasm-parser"); + +var _ast = require("@webassemblyjs/ast"); + +var _clone = require("@webassemblyjs/ast/lib/clone"); + +var _wasmOpt = require("@webassemblyjs/wasm-opt"); + +var _helperWasmBytecode = _interopRequireWildcard(require("@webassemblyjs/helper-wasm-bytecode")); + +var _apply = require("./apply"); + +function _getRequireWildcardCache(nodeInterop) { if (typeof WeakMap !== "function") return null; var cacheBabelInterop = new WeakMap(); var cacheNodeInterop = new WeakMap(); return (_getRequireWildcardCache = function _getRequireWildcardCache(nodeInterop) { return nodeInterop ? cacheNodeInterop : cacheBabelInterop; })(nodeInterop); } + +function _interopRequireWildcard(obj, nodeInterop) { if (!nodeInterop && obj && obj.__esModule) { return obj; } if (obj === null || _typeof(obj) !== "object" && typeof obj !== "function") { return { "default": obj }; } var cache = _getRequireWildcardCache(nodeInterop); if (cache && cache.has(obj)) { return cache.get(obj); } var newObj = {}; var hasPropertyDescriptor = Object.defineProperty && Object.getOwnPropertyDescriptor; for (var key in obj) { if (key !== "default" && Object.prototype.hasOwnProperty.call(obj, key)) { var desc = hasPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : null; if (desc && (desc.get || desc.set)) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } newObj["default"] = obj; if (cache) { cache.set(obj, newObj); } return newObj; } + +function _createForOfIteratorHelper(o, allowArrayLike) { var it = typeof Symbol !== "undefined" && o[Symbol.iterator] || o["@@iterator"]; if (!it) { if (Array.isArray(o) || (it = _unsupportedIterableToArray(o)) || allowArrayLike && o && typeof o.length === "number") { if (it) o = it; var i = 0; var F = function F() {}; return { s: F, n: function n() { if (i >= o.length) return { done: true }; return { done: false, value: o[i++] }; }, e: function e(_e) { throw _e; }, f: F }; } throw new TypeError("Invalid attempt to iterate non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method."); } var normalCompletion = true, didErr = false, err; return { s: function s() { it = it.call(o); }, n: function n() { var step = it.next(); normalCompletion = step.done; return step; }, e: function e(_e2) { didErr = true; err = _e2; }, f: function f() { try { if (!normalCompletion && it["return"] != null) it["return"](); } finally { if (didErr) throw err; } } }; } + +function _unsupportedIterableToArray(o, minLen) { if (!o) return; if (typeof o === "string") return _arrayLikeToArray(o, minLen); var n = Object.prototype.toString.call(o).slice(8, -1); if (n === "Object" && o.constructor) n = o.constructor.name; if (n === "Map" || n === "Set") return Array.from(o); if (n === "Arguments" || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n)) return _arrayLikeToArray(o, minLen); } + +function _arrayLikeToArray(arr, len) { if (len == null || len > arr.length) len = arr.length; for (var i = 0, arr2 = new Array(len); i < len; i++) { arr2[i] = arr[i]; } return arr2; } + +function hashNode(node) { + return JSON.stringify(node); +} + +function preprocess(ab) { + var optBin = (0, _wasmOpt.shrinkPaddedLEB128)(new Uint8Array(ab)); + return optBin.buffer; +} + +function sortBySectionOrder(nodes) { + var originalOrder = new Map(); + + var _iterator = _createForOfIteratorHelper(nodes), + _step; + + try { + for (_iterator.s(); !(_step = _iterator.n()).done;) { + var node = _step.value; + originalOrder.set(node, originalOrder.size); + } + } catch (err) { + _iterator.e(err); + } finally { + _iterator.f(); + } + + nodes.sort(function (a, b) { + var sectionA = (0, _helperWasmBytecode.getSectionForNode)(a); + var sectionB = (0, _helperWasmBytecode.getSectionForNode)(b); + var aId = _helperWasmBytecode["default"].sections[sectionA]; + var bId = _helperWasmBytecode["default"].sections[sectionB]; + + if (typeof aId !== "number" || typeof bId !== "number") { + throw new Error("Section id not found"); + } + + if (aId === bId) { + // $FlowIgnore originalOrder is filled for all nodes + return originalOrder.get(a) - originalOrder.get(b); + } + + return aId - bId; + }); +} + +function edit(ab, visitors) { + ab = preprocess(ab); + var ast = (0, _wasmParser.decode)(ab); + return editWithAST(ast, ab, visitors); +} + +function editWithAST(ast, ab, visitors) { + var operations = []; + var uint8Buffer = new Uint8Array(ab); + var nodeBefore; + + function before(type, path) { + nodeBefore = (0, _clone.cloneNode)(path.node); + } + + function after(type, path) { + if (path.node._deleted === true) { + operations.push({ + kind: "delete", + node: path.node + }); // $FlowIgnore + } else if (hashNode(nodeBefore) !== hashNode(path.node)) { + operations.push({ + kind: "update", + oldNode: nodeBefore, + node: path.node + }); + } + } + + (0, _ast.traverse)(ast, visitors, before, after); + uint8Buffer = (0, _apply.applyOperations)(ast, uint8Buffer, operations); + return uint8Buffer.buffer; +} + +function add(ab, newNodes) { + ab = preprocess(ab); + var ast = (0, _wasmParser.decode)(ab); + return addWithAST(ast, ab, newNodes); +} + +function addWithAST(ast, ab, newNodes) { + // Sort nodes by insertion order + sortBySectionOrder(newNodes); + var uint8Buffer = new Uint8Array(ab); // Map node into operations + + var operations = newNodes.map(function (n) { + return { + kind: "add", + node: n + }; + }); + uint8Buffer = (0, _apply.applyOperations)(ast, uint8Buffer, operations); + return uint8Buffer.buffer; +} Index: frontend/node_modules/@webassemblyjs/wasm-edit/package.json =================================================================== --- frontend/node_modules/@webassemblyjs/wasm-edit/package.json (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/@webassemblyjs/wasm-edit/package.json (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,33 @@ +{ + "name": "@webassemblyjs/wasm-edit", + "version": "1.14.1", + "description": "", + "main": "lib/index.js", + "module": "esm/index.js", + "scripts": { + "test": "echo \"Error: no test specified\" && exit 1" + }, + "repository": { + "type": "git", + "url": "https://github.com/xtuc/webassemblyjs.git" + }, + "publishConfig": { + "access": "public" + }, + "author": "Sven Sauleau", + "license": "MIT", + "dependencies": { + "@webassemblyjs/ast": "1.14.1", + "@webassemblyjs/helper-buffer": "1.14.1", + "@webassemblyjs/helper-wasm-bytecode": "1.13.2", + "@webassemblyjs/helper-wasm-section": "1.14.1", + "@webassemblyjs/wasm-gen": "1.14.1", + "@webassemblyjs/wasm-opt": "1.14.1", + "@webassemblyjs/wasm-parser": "1.14.1", + "@webassemblyjs/wast-printer": "1.14.1" + }, + "devDependencies": { + "@webassemblyjs/helper-test-framework": "1.14.1" + }, + "gitHead": "25d52b1296e151ac56244a7c3886661e6b4a69ea" +}