8889841cesm/create.js000066600000006340150515550760007151 0ustar00function _typeof(obj) { 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); } import { encodeNode } from "@webassemblyjs/wasm-gen"; import { overrideBytesInBuffer } from "@webassemblyjs/helper-buffer"; import constants from "@webassemblyjs/helper-wasm-bytecode"; import * as t from "@webassemblyjs/ast"; function findLastSection(ast, forSection) { var targetSectionId = constants.sections[forSection]; // $FlowIgnore: metadata can not be empty var moduleSections = ast.body[0].metadata.sections; var lastSection; var lastId = 0; for (var i = 0, len = moduleSections.length; i < len; i++) { var section = moduleSections[i]; // Ignore custom section since they can actually occur everywhere if (section.section === "custom") { continue; } var sectionId = constants.sections[section.section]; if (targetSectionId > lastId && targetSectionId < sectionId) { return lastSection; } lastId = sectionId; lastSection = section; } return lastSection; } export function createEmptySection(ast, uint8Buffer, section) { // previous section after which we are going to insert our section var lastSection = findLastSection(ast, section); var start, end; /** * It's the first section */ if (lastSection == null || lastSection.section === "custom") { start = 8 /* wasm header size */ ; end = start; } else { start = lastSection.startOffset + lastSection.size.value + 1; end = start; } // section id start += 1; var sizeStartLoc = { line: -1, column: start }; var sizeEndLoc = { line: -1, column: start + 1 }; // 1 byte for the empty vector var size = t.withLoc(t.numberLiteralFromRaw(1), sizeEndLoc, sizeStartLoc); var vectorOfSizeStartLoc = { line: -1, column: sizeEndLoc.column }; var vectorOfSizeEndLoc = { line: -1, column: sizeEndLoc.column + 1 }; var vectorOfSize = t.withLoc(t.numberLiteralFromRaw(0), vectorOfSizeEndLoc, vectorOfSizeStartLoc); var sectionMetadata = t.sectionMetadata(section, start, size, vectorOfSize); var sectionBytes = encodeNode(sectionMetadata); uint8Buffer = overrideBytesInBuffer(uint8Buffer, start - 1, end, sectionBytes); // Add section into the AST for later lookups if (_typeof(ast.body[0].metadata) === "object") { // $FlowIgnore: metadata can not be empty ast.body[0].metadata.sections.push(sectionMetadata); t.sortSectionMetadata(ast.body[0]); } /** * Update AST */ // Once we hit our section every that is after needs to be shifted by the delta var deltaBytes = +sectionBytes.length; var encounteredSection = false; t.traverse(ast, { SectionMetadata: function SectionMetadata(path) { if (path.node.section === section) { encounteredSection = true; return; } if (encounteredSection === true) { t.shiftSection(ast, path.node, deltaBytes); } } }); return { uint8Buffer: uint8Buffer, sectionMetadata: sectionMetadata }; }esm/index.js000066600000000241150515550760007007 0ustar00export { resizeSectionByteSize, resizeSectionVecSize } from "./resize"; export { createEmptySection } from "./create"; export { removeSections } from "./remove";esm/resize.js000066600000005524150515550760007212 0ustar00import { encodeU32 } from "@webassemblyjs/wasm-gen"; import { getSectionMetadata, traverse, shiftSection } from "@webassemblyjs/ast"; import { overrideBytesInBuffer } from "@webassemblyjs/helper-buffer"; export function resizeSectionByteSize(ast, uint8Buffer, section, deltaBytes) { var sectionMetadata = getSectionMetadata(ast, section); if (typeof sectionMetadata === "undefined") { throw new Error("Section metadata not found"); } if (typeof sectionMetadata.size.loc === "undefined") { throw new Error("SectionMetadata " + section + " has no loc"); } // keep old node location to be overriden var start = sectionMetadata.size.loc.start.column; var end = sectionMetadata.size.loc.end.column; var newSectionSize = sectionMetadata.size.value + deltaBytes; var newBytes = encodeU32(newSectionSize); /** * update AST */ sectionMetadata.size.value = newSectionSize; var oldu32EncodedLen = end - start; var newu32EncodedLen = newBytes.length; // the new u32 has a different encoded length if (newu32EncodedLen !== oldu32EncodedLen) { var deltaInSizeEncoding = newu32EncodedLen - oldu32EncodedLen; sectionMetadata.size.loc.end.column = start + newu32EncodedLen; deltaBytes += deltaInSizeEncoding; // move the vec size pointer size the section size is now smaller sectionMetadata.vectorOfSize.loc.start.column += deltaInSizeEncoding; sectionMetadata.vectorOfSize.loc.end.column += deltaInSizeEncoding; } // Once we hit our section every that is after needs to be shifted by the delta var encounteredSection = false; traverse(ast, { SectionMetadata: function SectionMetadata(path) { if (path.node.section === section) { encounteredSection = true; return; } if (encounteredSection === true) { shiftSection(ast, path.node, deltaBytes); } } }); return overrideBytesInBuffer(uint8Buffer, start, end, newBytes); } export function resizeSectionVecSize(ast, uint8Buffer, section, deltaElements) { var sectionMetadata = getSectionMetadata(ast, section); if (typeof sectionMetadata === "undefined") { throw new Error("Section metadata not found"); } if (typeof sectionMetadata.vectorOfSize.loc === "undefined") { throw new Error("SectionMetadata " + section + " has no loc"); } // Section has no vector if (sectionMetadata.vectorOfSize.value === -1) { return uint8Buffer; } // keep old node location to be overriden var start = sectionMetadata.vectorOfSize.loc.start.column; var end = sectionMetadata.vectorOfSize.loc.end.column; var newValue = sectionMetadata.vectorOfSize.value + deltaElements; var newBytes = encodeU32(newValue); // Update AST sectionMetadata.vectorOfSize.value = newValue; sectionMetadata.vectorOfSize.loc.end.column = start + newBytes.length; return overrideBytesInBuffer(uint8Buffer, start, end, newBytes); }esm/remove.js000066600000002462150515550760007204 0ustar00import { traverse, getSectionMetadatas, shiftSection } from "@webassemblyjs/ast"; import { overrideBytesInBuffer } from "@webassemblyjs/helper-buffer"; export function removeSections(ast, uint8Buffer, section) { var sectionMetadatas = getSectionMetadatas(ast, section); if (sectionMetadatas.length === 0) { throw new Error("Section metadata not found"); } return sectionMetadatas.reverse().reduce(function (uint8Buffer, sectionMetadata) { var startsIncludingId = sectionMetadata.startOffset - 1; var ends = section === "start" ? sectionMetadata.size.loc.end.column + 1 : sectionMetadata.startOffset + sectionMetadata.size.value + 1; var delta = -(ends - startsIncludingId); /** * update AST */ // Once we hit our section every that is after needs to be shifted by the delta var encounteredSection = false; traverse(ast, { SectionMetadata: function SectionMetadata(path) { if (path.node.section === section) { encounteredSection = true; return path.remove(); } if (encounteredSection === true) { shiftSection(ast, path.node, delta); } } }); // replacement is nothing var replacement = []; return overrideBytesInBuffer(uint8Buffer, startsIncludingId, ends, replacement); }, uint8Buffer); }lib/create.js000066600000010016150515550760007126 0ustar00"use strict"; Object.defineProperty(exports, "__esModule", { value: true }); exports.createEmptySection = createEmptySection; var _wasmGen = require("@webassemblyjs/wasm-gen"); var _helperBuffer = require("@webassemblyjs/helper-buffer"); var _helperWasmBytecode = _interopRequireDefault(require("@webassemblyjs/helper-wasm-bytecode")); var t = _interopRequireWildcard(require("@webassemblyjs/ast")); function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } else { var newObj = {}; if (obj != null) { for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) { var desc = Object.defineProperty && Object.getOwnPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : {}; if (desc.get || desc.set) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } } newObj.default = obj; return newObj; } } function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; } function _typeof(obj) { 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); } function findLastSection(ast, forSection) { var targetSectionId = _helperWasmBytecode.default.sections[forSection]; // $FlowIgnore: metadata can not be empty var moduleSections = ast.body[0].metadata.sections; var lastSection; var lastId = 0; for (var i = 0, len = moduleSections.length; i < len; i++) { var section = moduleSections[i]; // Ignore custom section since they can actually occur everywhere if (section.section === "custom") { continue; } var sectionId = _helperWasmBytecode.default.sections[section.section]; if (targetSectionId > lastId && targetSectionId < sectionId) { return lastSection; } lastId = sectionId; lastSection = section; } return lastSection; } function createEmptySection(ast, uint8Buffer, section) { // previous section after which we are going to insert our section var lastSection = findLastSection(ast, section); var start, end; /** * It's the first section */ if (lastSection == null || lastSection.section === "custom") { start = 8 /* wasm header size */ ; end = start; } else { start = lastSection.startOffset + lastSection.size.value + 1; end = start; } // section id start += 1; var sizeStartLoc = { line: -1, column: start }; var sizeEndLoc = { line: -1, column: start + 1 }; // 1 byte for the empty vector var size = t.withLoc(t.numberLiteralFromRaw(1), sizeEndLoc, sizeStartLoc); var vectorOfSizeStartLoc = { line: -1, column: sizeEndLoc.column }; var vectorOfSizeEndLoc = { line: -1, column: sizeEndLoc.column + 1 }; var vectorOfSize = t.withLoc(t.numberLiteralFromRaw(0), vectorOfSizeEndLoc, vectorOfSizeStartLoc); var sectionMetadata = t.sectionMetadata(section, start, size, vectorOfSize); var sectionBytes = (0, _wasmGen.encodeNode)(sectionMetadata); uint8Buffer = (0, _helperBuffer.overrideBytesInBuffer)(uint8Buffer, start - 1, end, sectionBytes); // Add section into the AST for later lookups if (_typeof(ast.body[0].metadata) === "object") { // $FlowIgnore: metadata can not be empty ast.body[0].metadata.sections.push(sectionMetadata); t.sortSectionMetadata(ast.body[0]); } /** * Update AST */ // Once we hit our section every that is after needs to be shifted by the delta var deltaBytes = +sectionBytes.length; var encounteredSection = false; t.traverse(ast, { SectionMetadata: function SectionMetadata(path) { if (path.node.section === section) { encounteredSection = true; return; } if (encounteredSection === true) { t.shiftSection(ast, path.node, deltaBytes); } } }); return { uint8Buffer: uint8Buffer, sectionMetadata: sectionMetadata }; }lib/index.js000066600000001405150515550760006774 0ustar00"use strict"; Object.defineProperty(exports, "__esModule", { value: true }); Object.defineProperty(exports, "resizeSectionByteSize", { enumerable: true, get: function get() { return _resize.resizeSectionByteSize; } }); Object.defineProperty(exports, "resizeSectionVecSize", { enumerable: true, get: function get() { return _resize.resizeSectionVecSize; } }); Object.defineProperty(exports, "createEmptySection", { enumerable: true, get: function get() { return _create.createEmptySection; } }); Object.defineProperty(exports, "removeSections", { enumerable: true, get: function get() { return _remove.removeSections; } }); var _resize = require("./resize"); var _create = require("./create"); var _remove = require("./remove");lib/resize.js000066600000006077150515550760007200 0ustar00"use strict"; Object.defineProperty(exports, "__esModule", { value: true }); exports.resizeSectionByteSize = resizeSectionByteSize; exports.resizeSectionVecSize = resizeSectionVecSize; var _wasmGen = require("@webassemblyjs/wasm-gen"); var _ast = require("@webassemblyjs/ast"); var _helperBuffer = require("@webassemblyjs/helper-buffer"); function resizeSectionByteSize(ast, uint8Buffer, section, deltaBytes) { var sectionMetadata = (0, _ast.getSectionMetadata)(ast, section); if (typeof sectionMetadata === "undefined") { throw new Error("Section metadata not found"); } if (typeof sectionMetadata.size.loc === "undefined") { throw new Error("SectionMetadata " + section + " has no loc"); } // keep old node location to be overriden var start = sectionMetadata.size.loc.start.column; var end = sectionMetadata.size.loc.end.column; var newSectionSize = sectionMetadata.size.value + deltaBytes; var newBytes = (0, _wasmGen.encodeU32)(newSectionSize); /** * update AST */ sectionMetadata.size.value = newSectionSize; var oldu32EncodedLen = end - start; var newu32EncodedLen = newBytes.length; // the new u32 has a different encoded length if (newu32EncodedLen !== oldu32EncodedLen) { var deltaInSizeEncoding = newu32EncodedLen - oldu32EncodedLen; sectionMetadata.size.loc.end.column = start + newu32EncodedLen; deltaBytes += deltaInSizeEncoding; // move the vec size pointer size the section size is now smaller sectionMetadata.vectorOfSize.loc.start.column += deltaInSizeEncoding; sectionMetadata.vectorOfSize.loc.end.column += deltaInSizeEncoding; } // Once we hit our section every that is after needs to be shifted by the delta var encounteredSection = false; (0, _ast.traverse)(ast, { SectionMetadata: function SectionMetadata(path) { if (path.node.section === section) { encounteredSection = true; return; } if (encounteredSection === true) { (0, _ast.shiftSection)(ast, path.node, deltaBytes); } } }); return (0, _helperBuffer.overrideBytesInBuffer)(uint8Buffer, start, end, newBytes); } function resizeSectionVecSize(ast, uint8Buffer, section, deltaElements) { var sectionMetadata = (0, _ast.getSectionMetadata)(ast, section); if (typeof sectionMetadata === "undefined") { throw new Error("Section metadata not found"); } if (typeof sectionMetadata.vectorOfSize.loc === "undefined") { throw new Error("SectionMetadata " + section + " has no loc"); } // Section has no vector if (sectionMetadata.vectorOfSize.value === -1) { return uint8Buffer; } // keep old node location to be overriden var start = sectionMetadata.vectorOfSize.loc.start.column; var end = sectionMetadata.vectorOfSize.loc.end.column; var newValue = sectionMetadata.vectorOfSize.value + deltaElements; var newBytes = (0, _wasmGen.encodeU32)(newValue); // Update AST sectionMetadata.vectorOfSize.value = newValue; sectionMetadata.vectorOfSize.loc.end.column = start + newBytes.length; return (0, _helperBuffer.overrideBytesInBuffer)(uint8Buffer, start, end, newBytes); }lib/remove.js000066600000002647150515550760007173 0ustar00"use strict"; Object.defineProperty(exports, "__esModule", { value: true }); exports.removeSections = removeSections; var _ast = require("@webassemblyjs/ast"); var _helperBuffer = require("@webassemblyjs/helper-buffer"); function removeSections(ast, uint8Buffer, section) { var sectionMetadatas = (0, _ast.getSectionMetadatas)(ast, section); if (sectionMetadatas.length === 0) { throw new Error("Section metadata not found"); } return sectionMetadatas.reverse().reduce(function (uint8Buffer, sectionMetadata) { var startsIncludingId = sectionMetadata.startOffset - 1; var ends = section === "start" ? sectionMetadata.size.loc.end.column + 1 : sectionMetadata.startOffset + sectionMetadata.size.value + 1; var delta = -(ends - startsIncludingId); /** * update AST */ // Once we hit our section every that is after needs to be shifted by the delta var encounteredSection = false; (0, _ast.traverse)(ast, { SectionMetadata: function SectionMetadata(path) { if (path.node.section === section) { encounteredSection = true; return path.remove(); } if (encounteredSection === true) { (0, _ast.shiftSection)(ast, path.node, delta); } } }); // replacement is nothing var replacement = []; return (0, _helperBuffer.overrideBytesInBuffer)(uint8Buffer, startsIncludingId, ends, replacement); }, uint8Buffer); }LICENSE000066600000002100150515550760005557 0ustar00MIT 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. package.json000066600000001355150515550760007053 0ustar00{ "name": "@webassemblyjs/helper-wasm-section", "version": "1.11.1", "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": "1.11.1", "@webassemblyjs/helper-buffer": "1.11.1", "@webassemblyjs/helper-wasm-bytecode": "1.11.1", "@webassemblyjs/wasm-gen": "1.11.1" }, "devDependencies": { "@webassemblyjs/wasm-parser": "1.11.1" }, "gitHead": "3f07e2db2031afe0ce686630418c542938c1674b" }