├── .npmignore ├── .travis.yml ├── LICENSE ├── README.md ├── docs └── index.md ├── index.js ├── injectGettersSetters.js ├── package-lock.json ├── package.json └── tests ├── index.js ├── wasm ├── customSections.wasm ├── doubleGlobals.wasm ├── empty.wasm ├── singleFunction.wasm ├── singleGlobal.wasm ├── singleI32Global.wasm ├── singleI64Global.wasm ├── singleImport.wasm ├── singleMemory.wasm ├── singleTable.wasm └── singleType.wasm ├── wast ├── doubleGlobals.wast ├── empty.wast ├── singleFunction.wast ├── singleI32Global.wast ├── singleI64Global.wast ├── singleImport.wast ├── singleMemory.wast ├── singleTable.wast └── singleType.wast └── wast2wasm.js /.npmignore: -------------------------------------------------------------------------------- 1 | /tests 2 | /docs 3 | -------------------------------------------------------------------------------- /.travis.yml: -------------------------------------------------------------------------------- 1 | language: node_js 2 | node_js: 3 | - "9" 4 | env: 5 | global: 6 | - CXX=g++-4.8 7 | matrix: 8 | - TEST_SUITE=test 9 | addons: 10 | apt: 11 | sources: 12 | - ubuntu-toolchain-r-test 13 | packages: 14 | - g++-4.8 15 | matrix: 16 | fast_finish: true 17 | include: 18 | - os: linux 19 | node_js: "9" 20 | env: TEST_SUITE=coveralls 21 | - os: linux 22 | node_js: "9" 23 | env: TEST_SUITE=lint 24 | script: npm run $TEST_SUITE 25 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | Mozilla Public License Version 2.0 2 | ================================== 3 | 4 | 1. Definitions 5 | -------------- 6 | 7 | 1.1. "Contributor" 8 | means each individual or legal entity that creates, contributes to 9 | the creation of, or owns Covered Software. 10 | 11 | 1.2. "Contributor Version" 12 | means the combination of the Contributions of others (if any) used 13 | by a Contributor and that particular Contributor's Contribution. 14 | 15 | 1.3. "Contribution" 16 | means Covered Software of a particular Contributor. 17 | 18 | 1.4. "Covered Software" 19 | means Source Code Form to which the initial Contributor has attached 20 | the notice in Exhibit A, the Executable Form of such Source Code 21 | Form, and Modifications of such Source Code Form, in each case 22 | including portions thereof. 23 | 24 | 1.5. "Incompatible With Secondary Licenses" 25 | means 26 | 27 | (a) that the initial Contributor has attached the notice described 28 | in Exhibit B to the Covered Software; or 29 | 30 | (b) that the Covered Software was made available under the terms of 31 | version 1.1 or earlier of the License, but not also under the 32 | terms of a Secondary License. 33 | 34 | 1.6. "Executable Form" 35 | means any form of the work other than Source Code Form. 36 | 37 | 1.7. "Larger Work" 38 | means a work that combines Covered Software with other material, in 39 | a separate file or files, that is not Covered Software. 40 | 41 | 1.8. "License" 42 | means this document. 43 | 44 | 1.9. "Licensable" 45 | means having the right to grant, to the maximum extent possible, 46 | whether at the time of the initial grant or subsequently, any and 47 | all of the rights conveyed by this License. 48 | 49 | 1.10. "Modifications" 50 | means any of the following: 51 | 52 | (a) any file in Source Code Form that results from an addition to, 53 | deletion from, or modification of the contents of Covered 54 | Software; or 55 | 56 | (b) any new file in Source Code Form that contains any Covered 57 | Software. 58 | 59 | 1.11. "Patent Claims" of a Contributor 60 | means any patent claim(s), including without limitation, method, 61 | process, and apparatus claims, in any patent Licensable by such 62 | Contributor that would be infringed, but for the grant of the 63 | License, by the making, using, selling, offering for sale, having 64 | made, import, or transfer of either its Contributions or its 65 | Contributor Version. 66 | 67 | 1.12. "Secondary License" 68 | means either the GNU General Public License, Version 2.0, the GNU 69 | Lesser General Public License, Version 2.1, the GNU Affero General 70 | Public License, Version 3.0, or any later versions of those 71 | licenses. 72 | 73 | 1.13. "Source Code Form" 74 | means the form of the work preferred for making modifications. 75 | 76 | 1.14. "You" (or "Your") 77 | means an individual or a legal entity exercising rights under this 78 | License. For legal entities, "You" includes any entity that 79 | controls, is controlled by, or is under common control with You. For 80 | purposes of this definition, "control" means (a) the power, direct 81 | or indirect, to cause the direction or management of such entity, 82 | whether by contract or otherwise, or (b) ownership of more than 83 | fifty percent (50%) of the outstanding shares or beneficial 84 | ownership of such entity. 85 | 86 | 2. License Grants and Conditions 87 | -------------------------------- 88 | 89 | 2.1. Grants 90 | 91 | Each Contributor hereby grants You a world-wide, royalty-free, 92 | non-exclusive license: 93 | 94 | (a) under intellectual property rights (other than patent or trademark) 95 | Licensable by such Contributor to use, reproduce, make available, 96 | modify, display, perform, distribute, and otherwise exploit its 97 | Contributions, either on an unmodified basis, with Modifications, or 98 | as part of a Larger Work; and 99 | 100 | (b) under Patent Claims of such Contributor to make, use, sell, offer 101 | for sale, have made, import, and otherwise transfer either its 102 | Contributions or its Contributor Version. 103 | 104 | 2.2. Effective Date 105 | 106 | The licenses granted in Section 2.1 with respect to any Contribution 107 | become effective for each Contribution on the date the Contributor first 108 | distributes such Contribution. 109 | 110 | 2.3. Limitations on Grant Scope 111 | 112 | The licenses granted in this Section 2 are the only rights granted under 113 | this License. No additional rights or licenses will be implied from the 114 | distribution or licensing of Covered Software under this License. 115 | Notwithstanding Section 2.1(b) above, no patent license is granted by a 116 | Contributor: 117 | 118 | (a) for any code that a Contributor has removed from Covered Software; 119 | or 120 | 121 | (b) for infringements caused by: (i) Your and any other third party's 122 | modifications of Covered Software, or (ii) the combination of its 123 | Contributions with other software (except as part of its Contributor 124 | Version); or 125 | 126 | (c) under Patent Claims infringed by Covered Software in the absence of 127 | its Contributions. 128 | 129 | This License does not grant any rights in the trademarks, service marks, 130 | or logos of any Contributor (except as may be necessary to comply with 131 | the notice requirements in Section 3.4). 132 | 133 | 2.4. Subsequent Licenses 134 | 135 | No Contributor makes additional grants as a result of Your choice to 136 | distribute the Covered Software under a subsequent version of this 137 | License (see Section 10.2) or under the terms of a Secondary License (if 138 | permitted under the terms of Section 3.3). 139 | 140 | 2.5. Representation 141 | 142 | Each Contributor represents that the Contributor believes its 143 | Contributions are its original creation(s) or it has sufficient rights 144 | to grant the rights to its Contributions conveyed by this License. 145 | 146 | 2.6. Fair Use 147 | 148 | This License is not intended to limit any rights You have under 149 | applicable copyright doctrines of fair use, fair dealing, or other 150 | equivalents. 151 | 152 | 2.7. Conditions 153 | 154 | Sections 3.1, 3.2, 3.3, and 3.4 are conditions of the licenses granted 155 | in Section 2.1. 156 | 157 | 3. Responsibilities 158 | ------------------- 159 | 160 | 3.1. Distribution of Source Form 161 | 162 | All distribution of Covered Software in Source Code Form, including any 163 | Modifications that You create or to which You contribute, must be under 164 | the terms of this License. You must inform recipients that the Source 165 | Code Form of the Covered Software is governed by the terms of this 166 | License, and how they can obtain a copy of this License. You may not 167 | attempt to alter or restrict the recipients' rights in the Source Code 168 | Form. 169 | 170 | 3.2. Distribution of Executable Form 171 | 172 | If You distribute Covered Software in Executable Form then: 173 | 174 | (a) such Covered Software must also be made available in Source Code 175 | Form, as described in Section 3.1, and You must inform recipients of 176 | the Executable Form how they can obtain a copy of such Source Code 177 | Form by reasonable means in a timely manner, at a charge no more 178 | than the cost of distribution to the recipient; and 179 | 180 | (b) You may distribute such Executable Form under the terms of this 181 | License, or sublicense it under different terms, provided that the 182 | license for the Executable Form does not attempt to limit or alter 183 | the recipients' rights in the Source Code Form under this License. 184 | 185 | 3.3. Distribution of a Larger Work 186 | 187 | You may create and distribute a Larger Work under terms of Your choice, 188 | provided that You also comply with the requirements of this License for 189 | the Covered Software. If the Larger Work is a combination of Covered 190 | Software with a work governed by one or more Secondary Licenses, and the 191 | Covered Software is not Incompatible With Secondary Licenses, this 192 | License permits You to additionally distribute such Covered Software 193 | under the terms of such Secondary License(s), so that the recipient of 194 | the Larger Work may, at their option, further distribute the Covered 195 | Software under the terms of either this License or such Secondary 196 | License(s). 197 | 198 | 3.4. Notices 199 | 200 | You may not remove or alter the substance of any license notices 201 | (including copyright notices, patent notices, disclaimers of warranty, 202 | or limitations of liability) contained within the Source Code Form of 203 | the Covered Software, except that You may alter any license notices to 204 | the extent required to remedy known factual inaccuracies. 205 | 206 | 3.5. Application of Additional Terms 207 | 208 | You may choose to offer, and to charge a fee for, warranty, support, 209 | indemnity or liability obligations to one or more recipients of Covered 210 | Software. However, You may do so only on Your own behalf, and not on 211 | behalf of any Contributor. You must make it absolutely clear that any 212 | such warranty, support, indemnity, or liability obligation is offered by 213 | You alone, and You hereby agree to indemnify every Contributor for any 214 | liability incurred by such Contributor as a result of warranty, support, 215 | indemnity or liability terms You offer. You may include additional 216 | disclaimers of warranty and limitations of liability specific to any 217 | jurisdiction. 218 | 219 | 4. Inability to Comply Due to Statute or Regulation 220 | --------------------------------------------------- 221 | 222 | If it is impossible for You to comply with any of the terms of this 223 | License with respect to some or all of the Covered Software due to 224 | statute, judicial order, or regulation then You must: (a) comply with 225 | the terms of this License to the maximum extent possible; and (b) 226 | describe the limitations and the code they affect. Such description must 227 | be placed in a text file included with all distributions of the Covered 228 | Software under this License. Except to the extent prohibited by statute 229 | or regulation, such description must be sufficiently detailed for a 230 | recipient of ordinary skill to be able to understand it. 231 | 232 | 5. Termination 233 | -------------- 234 | 235 | 5.1. The rights granted under this License will terminate automatically 236 | if You fail to comply with any of its terms. However, if You become 237 | compliant, then the rights granted under this License from a particular 238 | Contributor are reinstated (a) provisionally, unless and until such 239 | Contributor explicitly and finally terminates Your grants, and (b) on an 240 | ongoing basis, if such Contributor fails to notify You of the 241 | non-compliance by some reasonable means prior to 60 days after You have 242 | come back into compliance. Moreover, Your grants from a particular 243 | Contributor are reinstated on an ongoing basis if such Contributor 244 | notifies You of the non-compliance by some reasonable means, this is the 245 | first time You have received notice of non-compliance with this License 246 | from such Contributor, and You become compliant prior to 30 days after 247 | Your receipt of the notice. 248 | 249 | 5.2. If You initiate litigation against any entity by asserting a patent 250 | infringement claim (excluding declaratory judgment actions, 251 | counter-claims, and cross-claims) alleging that a Contributor Version 252 | directly or indirectly infringes any patent, then the rights granted to 253 | You by any and all Contributors for the Covered Software under Section 254 | 2.1 of this License shall terminate. 255 | 256 | 5.3. In the event of termination under Sections 5.1 or 5.2 above, all 257 | end user license agreements (excluding distributors and resellers) which 258 | have been validly granted by You or Your distributors under this License 259 | prior to termination shall survive termination. 260 | 261 | ************************************************************************ 262 | * * 263 | * 6. Disclaimer of Warranty * 264 | * ------------------------- * 265 | * * 266 | * Covered Software is provided under this License on an "as is" * 267 | * basis, without warranty of any kind, either expressed, implied, or * 268 | * statutory, including, without limitation, warranties that the * 269 | * Covered Software is free of defects, merchantable, fit for a * 270 | * particular purpose or non-infringing. The entire risk as to the * 271 | * quality and performance of the Covered Software is with You. * 272 | * Should any Covered Software prove defective in any respect, You * 273 | * (not any Contributor) assume the cost of any necessary servicing, * 274 | * repair, or correction. This disclaimer of warranty constitutes an * 275 | * essential part of this License. No use of any Covered Software is * 276 | * authorized under this License except under this disclaimer. * 277 | * * 278 | ************************************************************************ 279 | 280 | ************************************************************************ 281 | * * 282 | * 7. Limitation of Liability * 283 | * -------------------------- * 284 | * * 285 | * Under no circumstances and under no legal theory, whether tort * 286 | * (including negligence), contract, or otherwise, shall any * 287 | * Contributor, or anyone who distributes Covered Software as * 288 | * permitted above, be liable to You for any direct, indirect, * 289 | * special, incidental, or consequential damages of any character * 290 | * including, without limitation, damages for lost profits, loss of * 291 | * goodwill, work stoppage, computer failure or malfunction, or any * 292 | * and all other commercial damages or losses, even if such party * 293 | * shall have been informed of the possibility of such damages. This * 294 | * limitation of liability shall not apply to liability for death or * 295 | * personal injury resulting from such party's negligence to the * 296 | * extent applicable law prohibits such limitation. Some * 297 | * jurisdictions do not allow the exclusion or limitation of * 298 | * incidental or consequential damages, so this exclusion and * 299 | * limitation may not apply to You. * 300 | * * 301 | ************************************************************************ 302 | 303 | 8. Litigation 304 | ------------- 305 | 306 | Any litigation relating to this License may be brought only in the 307 | courts of a jurisdiction where the defendant maintains its principal 308 | place of business and such litigation shall be governed by laws of that 309 | jurisdiction, without reference to its conflict-of-law provisions. 310 | Nothing in this Section shall prevent a party's ability to bring 311 | cross-claims or counter-claims. 312 | 313 | 9. Miscellaneous 314 | ---------------- 315 | 316 | This License represents the complete agreement concerning the subject 317 | matter hereof. If any provision of this License is held to be 318 | unenforceable, such provision shall be reformed only to the extent 319 | necessary to make it enforceable. Any law or regulation which provides 320 | that the language of a contract shall be construed against the drafter 321 | shall not be used to construe this License against a Contributor. 322 | 323 | 10. Versions of the License 324 | --------------------------- 325 | 326 | 10.1. New Versions 327 | 328 | Mozilla Foundation is the license steward. Except as provided in Section 329 | 10.3, no one other than the license steward has the right to modify or 330 | publish new versions of this License. Each version will be given a 331 | distinguishing version number. 332 | 333 | 10.2. Effect of New Versions 334 | 335 | You may distribute the Covered Software under the terms of the version 336 | of the License under which You originally received the Covered Software, 337 | or under the terms of any subsequent version published by the license 338 | steward. 339 | 340 | 10.3. Modified Versions 341 | 342 | If you create software not governed by this License, and you want to 343 | create a new license for such software, you may create and use a 344 | modified version of this License if you rename the license and remove 345 | any references to the name of the license steward (except to note that 346 | such modified license differs from this License). 347 | 348 | 10.4. Distributing Source Code Form that is Incompatible With Secondary 349 | Licenses 350 | 351 | If You choose to distribute Source Code Form that is Incompatible With 352 | Secondary Licenses under the terms of this version of the License, the 353 | notice described in Exhibit B of this License must be attached. 354 | 355 | Exhibit A - Source Code Form License Notice 356 | ------------------------------------------- 357 | 358 | This Source Code Form is subject to the terms of the Mozilla Public 359 | License, v. 2.0. If a copy of the MPL was not distributed with this 360 | file, You can obtain one at http://mozilla.org/MPL/2.0/. 361 | 362 | If it is not possible or desirable to put the notice in a particular 363 | file, then You may include the notice in a location (such as a LICENSE 364 | file in a relevant directory) where a recipient would be likely to look 365 | for such a notice. 366 | 367 | You may add additional accurate notices of copyright ownership. 368 | 369 | Exhibit B - "Incompatible With Secondary Licenses" Notice 370 | --------------------------------------------------------- 371 | 372 | This Source Code Form is "Incompatible With Secondary Licenses", as 373 | defined by the Mozilla Public License, v. 2.0. 374 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # SYNOPSIS 2 | 3 | [![NPM Package](https://img.shields.io/npm/v/wasm-persist.svg?style=flat-square)](https://www.npmjs.org/package/wasm-persist) 4 | [![Build Status](https://img.shields.io/travis/dfinity/wasm-persist.svg?branch=master&style=flat-square)](https://travis-ci.org/dfinity/wasm-persist) 5 | [![Coverage Status](https://img.shields.io/coveralls/dfinity/wasm-persist.svg?style=flat-square)](https://coveralls.io/r/dfinity/wasm-persist) 6 | 7 | [![js-standard-style](https://cdn.rawgit.com/feross/standard/master/badge.svg)](https://github.com/feross/standard) 8 | 9 | This allows you to hibernate a WebAssembly instance and later start it up again at the exact place you left off. 10 | 11 | # INSTALL 12 | `npm install wasm-persist` 13 | 14 | # USAGE 15 | 16 | ```javascript 17 | const persist = require('wasm-persist') 18 | ... 19 | wasm = persist.prepare(wasm) 20 | const {instance} = await WebAssembly.instantiate(wasm) 21 | // call some exported functions on your instance 22 | // then when you are done 23 | const state = persist.hibernate(instance) 24 | 25 | ... 26 | 27 | // later you can revive the wasm instance 28 | const {instance} = await WebAssembly.instantiate(wasm) 29 | // just call persist.resume with the old state 30 | persist.resume(instance, state) 31 | ``` 32 | 33 | # DESCRIPTION 34 | The Idea for wasm-persist came from [orthogonal persistence](https://en.wikipedia.org/wiki/Persistence_(computer_science)#Orthogonal_or_transparent_persistence). wasm-persist injects getter and setter function for each global and exports the 35 | memory and table if they exist. Hibernate calls the getters and creates an Object that contains the memory (as a typedArray), the globals, and the function table. Resume does the opposite and calls the setters for the globals and updates the memory and the table. Foreign functions on the table are not handled currently. 36 | 37 | # API 38 | [./docs/](./docs/index.md) 39 | 40 | # LICENSE 41 | [MPL-2.0][LICENSE] 42 | 43 | [LICENSE]: https://tldrlegal.com/license/mozilla-public-license-2.0-(mpl-2) 44 | -------------------------------------------------------------------------------- /docs/index.md: -------------------------------------------------------------------------------- 1 | 2 | 3 | ### Table of Contents 4 | 5 | - [prepare][1] 6 | - [hibernate][2] 7 | - [resume][3] 8 | 9 | ## prepare 10 | 11 | [index.js:16-18][4] 12 | 13 | Prepares a binary by injecting getter and setter function for memory, globals and tables. 14 | 15 | **Parameters** 16 | 17 | - `binary` **[ArrayBuffer][5]** a wasm binary 18 | - `include` **[Object][6]** (optional, default `{memory:true,table:true}`) 19 | - `include.memory` **[Boolean][7]** whether or not to include memory (optional, default `true`) 20 | - `include.table` **[Boolean][7]** whether or not to include the function table (optional, default `true`) 21 | - `include.globals` **[Array][8]<[Boolean][7]>** whether or not to 22 | include a given global. Each index in the array stands for a global index. 23 | Indexes that are set to false or left undefined will not be persisted. By 24 | default all globals are persisted. (optional, default `Array.`) 25 | - `symbol` **[String][9]** a string used to prefix the injected setter and getter functions (optional, default `'_'`) 26 | 27 | Returns **[ArrayBuffer][5]** the resulting wasm binary 28 | 29 | ## hibernate 30 | 31 | [index.js:27-64][10] 32 | 33 | Given a Webassembly Instance this will produce an Object containing the current state of 34 | the instance 35 | 36 | **Parameters** 37 | 38 | - `instance` **Webassembly.Instance** 39 | - `symbol` **[String][9]** the symbol that will be used to find the injected functions (optional, default `'_'`) 40 | 41 | Returns **[Object][6]** the state of the wasm instance 42 | 43 | ## resume 44 | 45 | [index.js:72-102][11] 46 | 47 | Resumes a previously hibernated Webassembly instance 48 | 49 | **Parameters** 50 | 51 | - `instance` **WebAssembly.Instance** 52 | - `state` **[Object][6]** the previous state of the wasm instance 53 | 54 | Returns **WebAssembly.Instance** 55 | 56 | [1]: #prepare 57 | 58 | [2]: #hibernate 59 | 60 | [3]: #resume 61 | 62 | [4]: https://github.com/dfinity/wasm-persist/blob/6d8733c40b8d0082927219c30a05351081c913eb/index.js#L16-L18 "Source code on GitHub" 63 | 64 | [5]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/ArrayBuffer 65 | 66 | [6]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Object 67 | 68 | [7]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Boolean 69 | 70 | [8]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Array 71 | 72 | [9]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/String 73 | 74 | [10]: https://github.com/dfinity/wasm-persist/blob/6d8733c40b8d0082927219c30a05351081c913eb/index.js#L27-L64 "Source code on GitHub" 75 | 76 | [11]: https://github.com/dfinity/wasm-persist/blob/6d8733c40b8d0082927219c30a05351081c913eb/index.js#L72-L102 "Source code on GitHub" 77 | -------------------------------------------------------------------------------- /index.js: -------------------------------------------------------------------------------- 1 | const inject = require('./injectGettersSetters.js') 2 | 3 | /** 4 | * Prepares a binary by injecting getter and setter function for memory, globals and tables. 5 | * @param {ArrayBuffer} binary - a wasm binary 6 | * @param {Object} include 7 | * @param {Boolean} [include.memory=true] - whether or not to include memory 8 | * @param {Boolean} [include.table=true] - whether or not to include the function table 9 | * @param {Array.} [include.globals=Array.] - whether or not to 10 | * include a given global. Each index in the array stands for a global index. 11 | * Indexes that are set to false or left undefined will not be persisted. By 12 | * default all globals are persisted. 13 | * @param {String} [symbol = '_'] - a string used to prefix the injected setter and getter functions 14 | * @return {ArrayBuffer} the resulting wasm binary 15 | */ 16 | function prepare (binary, include = {memory: true, table: true}, symbol = '_') { 17 | return inject(binary, include, symbol) 18 | } 19 | 20 | /** 21 | * Given a Webassembly Instance this will produce an Object containing the current state of 22 | * the instance 23 | * @param {WebAssembly.Instance} instance 24 | * @param {String} symbol - the symbol that will be used to find the injected functions 25 | * @return {Object} the state of the wasm instance 26 | */ 27 | function hibernate (instance, symbol = '_') { 28 | const json = { 29 | globals: [], 30 | table: [], 31 | symbol 32 | } 33 | for (const key in instance.exports) { 34 | const val = instance.exports[key] 35 | if (key.startsWith(symbol)) { 36 | const keyElems = key.slice(symbol.length).split('_') 37 | // save the memory 38 | if (val instanceof WebAssembly.Memory) { 39 | json.memory = new Uint32Array(val.buffer) 40 | } else if (val instanceof WebAssembly.Table) { 41 | // mark the tables, (do something for external function?) 42 | // the external functions should have a callback 43 | for (let i = 0; i < val.length; i++) { 44 | const func = val.get(i) 45 | if (func === instance.exports[`${symbol}func_${func.name}`]) { 46 | json.table.push(func.name) 47 | } 48 | } 49 | } else if (keyElems[0] === 'global' && keyElems[1] === 'getter') { 50 | // save the globals 51 | const last = keyElems.pop() 52 | if (last === 'high') { 53 | json.globals.push([instance.exports[key]()]) 54 | } else if (last === 'low') { 55 | json.globals[json.globals.length - 1].push(instance.exports[key]()) 56 | } else { 57 | json.globals.push(instance.exports[key]()) 58 | } 59 | } 60 | } 61 | } 62 | instance.__hibernated = true 63 | return json 64 | } 65 | 66 | /** 67 | * Resumes a previously hibernated Webassembly instance 68 | * @param {WebAssembly.Instance} instance 69 | * @param {Object} state - the previous state of the wasm instance 70 | * @return {WebAssembly.Instance} 71 | */ 72 | function resume (instance, state) { 73 | if (instance.__hibernated) { 74 | instance.__hibernated = false 75 | } else { 76 | // initialize memory 77 | const mem = instance.exports[`${state.symbol}memory`] 78 | if (mem) { 79 | (new Uint32Array(mem.buffer)).set(state.memory, 0) 80 | } 81 | 82 | // initialize table 83 | if (instance.exports._table) { 84 | for (const index in state.table) { 85 | const funcIndex = state.table[index] 86 | instance.exports._table.set(index, instance.exports[`${state.symbol}func_${funcIndex}`]) 87 | } 88 | } 89 | 90 | // initialize globals 91 | for (const index in state.globals) { 92 | const val = state.globals[index] 93 | if (val !== undefined) { 94 | if (Array.isArray(val)) { 95 | instance.exports[`${state.symbol}global_setter_i64_${index}`](val[1], val[0]) 96 | } else { 97 | instance.exports[`${state.symbol}global_setter_i32_${index}`](val) 98 | } 99 | } 100 | } 101 | } 102 | return instance 103 | } 104 | 105 | module.exports = { 106 | prepare, 107 | hibernate, 108 | resume 109 | } 110 | -------------------------------------------------------------------------------- /injectGettersSetters.js: -------------------------------------------------------------------------------- 1 | const leb128 = require('leb128').unsigned 2 | const Pipe = require('buffer-pipe') 3 | const {Iterator, json2wasm} = require('wasm-json-toolkit') 4 | 5 | const EXTERNAL_KIND = json2wasm.EXTERNAL_KIND 6 | 7 | module.exports = function prepare (wasm, include, symbol) { 8 | let globalI64SetterIndex, globalI32SetterIndex, globalGetterIndex, funcSection 9 | let numOfFuncs = 0 10 | let numOfImports = 0 11 | const addedCodeEntries = [] 12 | const globalsGetterSetters = [] 13 | 14 | const needExporting = { 15 | 'function': [], 16 | 'global': [] 17 | } 18 | 19 | const it = new Iterator(wasm) 20 | 21 | for (const section of it) { 22 | if (section.type === 'type') { 23 | const numOfTypes = section.count 24 | // form: func, 1 param, i32, no return 25 | const globalI32SetterType = Buffer.from([0x60, 0x01, 0x7f, 0x0]) 26 | // form: func, 2 param, i32, i32, no return 27 | const globalI64SetterType = Buffer.from([0x60, 0x02, 0x7f, 0x7f, 0x0]) 28 | // form: func, 0 param, i32, 1 return 29 | const globalGetterType = Buffer.from([0x60, 0x00, 0x1, 0x7f]) 30 | section.appendEntries([globalI32SetterType, globalI64SetterType, globalGetterType]) 31 | 32 | globalI32SetterIndex = leb128.encode(numOfTypes) 33 | globalI64SetterIndex = leb128.encode(numOfTypes + 1) 34 | globalGetterIndex = leb128.encode(numOfTypes + 2) 35 | } else if (section.type === 'import') { 36 | // parse the import section to build the function indexes 37 | const json = section.toJSON() 38 | numOfImports = json.entries.filter(entry => entry.kind === 'function').length 39 | } else if (section.type === 'function') { 40 | // mark functions to be exported 41 | numOfFuncs = section.count 42 | funcSection = section 43 | needExporting['function'] = Array(section.count).fill(true) 44 | } else if (section.type === 'table') { 45 | needExporting['table'] = true && include.table 46 | } else if (section.type === 'memory') { 47 | needExporting['memory'] = true && include.memory 48 | } else if (section.type === 'global') { 49 | const json = section.toJSON() 50 | const addedFuncs = [] 51 | if (!include.globals) { 52 | include.globals = new Array(json.entries.length).fill(true) 53 | } 54 | for (const i in json.entries) { 55 | const type = json.entries[i].type 56 | const lebIndex = leb128.encode(i) 57 | if (type.mutability && include.globals[i]) { 58 | if (type.contentType === 'i32') { 59 | globalsGetterSetters.push(type.contentType) 60 | addedFuncs.push(globalGetterIndex) 61 | addedFuncs.push(globalI32SetterIndex) 62 | // getter 63 | // size, local count, get_global, index, end 64 | addedCodeEntries.push(Buffer.concat([ 65 | Buffer.from([0x03 + lebIndex.length, 0x00, 0x23]), 66 | lebIndex, 67 | Buffer.from([0x0b]) 68 | ])) 69 | // setter 70 | // size, local count, get_local, index , set_global, index, end 71 | addedCodeEntries.push(Buffer.concat([ 72 | Buffer.from([0x05 + lebIndex.length, 0x00, 0x20, 0x0, 0x24]), 73 | lebIndex, 74 | Buffer.from([0x0b]) 75 | ])) 76 | } else { 77 | globalsGetterSetters.push(type.contentType) 78 | addedFuncs.push(globalGetterIndex) 79 | addedFuncs.push(globalGetterIndex) 80 | addedFuncs.push(globalI64SetterIndex) 81 | // 64 bit 82 | // getter high 83 | addedCodeEntries.push(Buffer.concat([ 84 | Buffer.from([0x07 + lebIndex.length, 0x00, 0x23]), 85 | lebIndex, 86 | Buffer.from([0x42, 0x20, 0x88, 0xa7, 0x0b]) 87 | ])) 88 | 89 | // get low 90 | addedCodeEntries.push(Buffer.concat([ 91 | Buffer.from([0x04 + lebIndex.length, 0x00, 0x23]), 92 | lebIndex, 93 | Buffer.from([0xa7, 0x0b]) 94 | ])) 95 | // (set_global $b 96 | // (i64.add 97 | // (i64.shl (i64.extend_u/i32 (get_local 0)) (i64.const 32)) 98 | // (i64.extend_u/i32 (get_local 1)))) 99 | // setter 100 | addedCodeEntries.push(Buffer.concat([ 101 | Buffer.from([0x0d + lebIndex.length, 0x00, 0x20, 0x01, 0xad, 0x42, 0x20, 0x86, 0x20, 0x00, 0xad, 0x7c, 0x24]), 102 | lebIndex, 103 | Buffer.from([0x0b]) 104 | ])) 105 | } 106 | } 107 | } 108 | funcSection.appendEntries(addedFuncs) 109 | } else if (section.type === 'export') { 110 | // export the memory 111 | const addedExports = [] 112 | if (needExporting['memory']) { 113 | const funcExp = generateFuncExport(`${symbol}memory`, 0, 'memory') 114 | addedExports.push(funcExp) 115 | } 116 | 117 | // export the table 118 | if (needExporting['table']) { 119 | const funcExp = generateFuncExport(`${symbol}table`, 0, 'table') 120 | addedExports.push(funcExp) 121 | } 122 | 123 | // export functions 124 | const funcs = needExporting['function'] 125 | for (let index in funcs) { 126 | index = Number(index) 127 | const funcExp = generateFuncExport(`${symbol}func_${index + numOfImports}`, numOfImports + index, 'function') 128 | addedExports.push(funcExp) 129 | } 130 | 131 | // export globals 132 | let globalFuncIndex = 0 133 | for (let index in globalsGetterSetters) { 134 | const type = globalsGetterSetters[index] 135 | const funcIndex = numOfImports + numOfFuncs + globalFuncIndex 136 | if (type === 'i32') { 137 | // getter 138 | const getter = generateFuncExport(`${symbol}global_getter_${type}_${index}`, funcIndex, 'function') 139 | addedExports.push(getter) 140 | 141 | // setter 142 | const setter = generateFuncExport(`${symbol}global_setter_${type}_${index}`, funcIndex + 1, 'function') 143 | addedExports.push(setter) 144 | globalFuncIndex += 2 145 | } else { 146 | // i64s 147 | // setter high 148 | const setterHigh = generateFuncExport(`${symbol}global_getter_${type}_${index}_high`, funcIndex, 'function') 149 | addedExports.push(setterHigh) 150 | // setter Low 151 | const setterLow = generateFuncExport(`${symbol}global_getter_${type}_${index}_low`, funcIndex + 1, 'function') 152 | addedExports.push(setterLow) 153 | // getter 154 | const getter = generateFuncExport(`${symbol}global_setter_${type}_${index}`, funcIndex + 2, 'function') 155 | addedExports.push(getter) 156 | globalFuncIndex += 3 157 | } 158 | } 159 | section.appendEntries(addedExports) 160 | } else if (section.type === 'code') { 161 | section.appendEntries(addedCodeEntries) 162 | } 163 | } 164 | return it.wasm 165 | } 166 | 167 | function generateFuncExport (name, index, type) { 168 | const setterHigh = new Pipe() 169 | const fieldString = Buffer.from(name) 170 | leb128.write(fieldString.length, setterHigh) 171 | setterHigh.write(fieldString) 172 | setterHigh.write(Buffer.from([EXTERNAL_KIND[type]])) 173 | leb128.write(index, setterHigh) 174 | return setterHigh.buffer 175 | } 176 | -------------------------------------------------------------------------------- /package.json: -------------------------------------------------------------------------------- 1 | { 2 | "name": "wasm-persist", 3 | "version": "0.0.3", 4 | "description": "a JS module for creating orthogonal persistent WebAssembly instances", 5 | "main": "index.js", 6 | "scripts": { 7 | "coveralls": "npm run coverage && nyc report --reporter=text-lcov | coveralls", 8 | "coverage": "nyc npm test", 9 | "lint": "standard", 10 | "test": "node ./tests/index.js", 11 | "build:docs": "documentation build --github -f md ./index.js > ./docs/index.md" 12 | }, 13 | "keywords": [ 14 | "WebAssembly", 15 | "wasm" 16 | ], 17 | "author": "mjbecze ", 18 | "license": "MPL-2.0", 19 | "dependencies": { 20 | "buffer-pipe": "0.0.3", 21 | "leb128": "0.0.4", 22 | "wasm-json-toolkit": "0.2.6" 23 | }, 24 | "standard": { 25 | "globals": [ 26 | "WebAssembly" 27 | ] 28 | }, 29 | "devDependencies": { 30 | "coveralls": "^3.0.1", 31 | "documentation": "^8.0.0", 32 | "minimist": "^1.2.0", 33 | "nyc": "^12.0.1", 34 | "standard": "^11.0.1", 35 | "tape": "^4.9.0", 36 | "wabt": "^1.0.0" 37 | }, 38 | "repository": { 39 | "type": "git", 40 | "url": "git@github.com:dfinity/wasm-persist.git" 41 | }, 42 | "bugs": { 43 | "url": "https://github.com/dfinity/wasm-persist/issues" 44 | }, 45 | "homepage": "https://github.com/dfinity/wasm-persist" 46 | } 47 | -------------------------------------------------------------------------------- /tests/index.js: -------------------------------------------------------------------------------- 1 | const fs = require('fs') 2 | const tape = require('tape') 3 | const persit = require('../') 4 | 5 | tape('empty', async t => { 6 | let wasm = fs.readFileSync(`${__dirname}/wasm/empty.wasm`) 7 | wasm = persit.prepare(wasm) 8 | const wasmInstance = await WebAssembly.instantiate(wasm) 9 | const json = persit.hibernate(wasmInstance.instance) 10 | persit.resume(wasmInstance.instance, json) 11 | t.deepEquals(json, {globals: [], table: [], symbol: '_'}) 12 | t.equals(Object.keys(wasmInstance.instance.exports).length, 0) 13 | 14 | t.end() 15 | }) 16 | 17 | tape('custom', async t => { 18 | let wasm = fs.readFileSync(`${__dirname}/wasm/customSections.wasm`) 19 | wasm = persit.prepare(wasm) 20 | const wasmInstance = await WebAssembly.instantiate(wasm) 21 | const json = persit.hibernate(wasmInstance.instance) 22 | persit.resume(wasmInstance.instance, json) 23 | t.deepEquals(json, {globals: [], table: [], symbol: '_'}) 24 | t.equals(Object.keys(wasmInstance.instance.exports).length, 0) 25 | 26 | t.end() 27 | }) 28 | 29 | tape('single type section', async t => { 30 | let wasm = fs.readFileSync(`${__dirname}/wasm/singleType.wasm`) 31 | wasm = persit.prepare(wasm) 32 | const wasmInstance = await WebAssembly.instantiate(wasm) 33 | const json = persit.hibernate(wasmInstance.instance) 34 | t.deepEquals(json, {globals: [], table: [], symbol: '_'}) 35 | t.equals(Object.keys(wasmInstance.instance.exports).length, 0) 36 | 37 | t.end() 38 | }) 39 | 40 | tape('single import section', async t => { 41 | let wasm = fs.readFileSync(`${__dirname}/wasm/singleImport.wasm`) 42 | wasm = persit.prepare(wasm) 43 | const wasmInstance = await WebAssembly.instantiate(wasm, {foo: {bar () {}}}) 44 | const json = persit.hibernate(wasmInstance.instance) 45 | t.deepEquals(json, {globals: [], table: [], symbol: '_'}) 46 | t.equals(Object.keys(wasmInstance.instance.exports).length, 0) 47 | 48 | t.end() 49 | }) 50 | 51 | tape('single function', async t => { 52 | let wasm = fs.readFileSync(`${__dirname}/wasm/singleFunction.wasm`) 53 | wasm = persit.prepare(wasm) 54 | const wasmInstance = await WebAssembly.instantiate(wasm) 55 | const json = persit.hibernate(wasmInstance.instance) 56 | t.deepEquals(json, {globals: [], table: [], symbol: '_'}) 57 | t.equals(Object.keys(wasmInstance.instance.exports).length, 2) 58 | 59 | t.end() 60 | }) 61 | 62 | tape('single table', async t => { 63 | let wasm = fs.readFileSync(`${__dirname}/wasm/singleTable.wasm`) 64 | wasm = persit.prepare(wasm) 65 | const wasmInstance = await WebAssembly.instantiate(wasm) 66 | const json = persit.hibernate(wasmInstance.instance) 67 | t.deepEquals(json, {globals: [], table: ['0'], symbol: '_'}) 68 | t.equals(Object.keys(wasmInstance.instance.exports).length, 3) 69 | 70 | t.end() 71 | }) 72 | 73 | tape('single table with foreign fuction', async t => { 74 | let wasm = fs.readFileSync(`${__dirname}/wasm/singleTable.wasm`) 75 | wasm = persit.prepare(wasm) 76 | const wasmInstance = await WebAssembly.instantiate(wasm) 77 | const wasmInstance2 = await WebAssembly.instantiate(wasm) 78 | wasmInstance.instance.exports._table.set(0, wasmInstance2.instance.exports.e) 79 | const json = persit.hibernate(wasmInstance.instance) 80 | t.deepEquals(json, {globals: [], table: [], symbol: '_'}) 81 | t.equals(Object.keys(wasmInstance.instance.exports).length, 3) 82 | 83 | t.end() 84 | }) 85 | 86 | tape('single table resume', async t => { 87 | let wasm = fs.readFileSync(`${__dirname}/wasm/singleTable.wasm`) 88 | wasm = persit.prepare(wasm) 89 | const wasmInstance = await WebAssembly.instantiate(wasm) 90 | const json = persit.hibernate(wasmInstance.instance) 91 | 92 | const wasmInstance2 = await WebAssembly.instantiate(wasm) 93 | persit.resume(wasmInstance2.instance, json) 94 | const json2 = persit.hibernate(wasmInstance2.instance) 95 | t.deepEquals(json, json2) 96 | t.equals(Object.keys(wasmInstance.instance.exports).length, 3) 97 | 98 | t.end() 99 | }) 100 | 101 | tape('single memory', async t => { 102 | let wasm = fs.readFileSync(`${__dirname}/wasm/singleMemory.wasm`) 103 | wasm = persit.prepare(wasm) 104 | const wasmInstance = await WebAssembly.instantiate(wasm) 105 | const json = persit.hibernate(wasmInstance.instance) 106 | t.equals(json.memory.length, 16384) 107 | t.equals(Object.keys(wasmInstance.instance.exports).length, 3) 108 | 109 | t.end() 110 | }) 111 | 112 | tape('skipping memory', async t => { 113 | let wasm = fs.readFileSync(`${__dirname}/wasm/singleMemory.wasm`) 114 | wasm = persit.prepare(wasm, '_', {memory: false}) 115 | const wasmInstance = await WebAssembly.instantiate(wasm) 116 | const json = persit.hibernate(wasmInstance.instance) 117 | t.equals(json.memory, undefined) 118 | t.equals(Object.keys(wasmInstance.instance.exports).length, 2) 119 | 120 | t.end() 121 | }) 122 | 123 | tape('resuming memory', async t => { 124 | let wasm = fs.readFileSync(`${__dirname}/wasm/singleMemory.wasm`) 125 | wasm = persit.prepare(wasm) 126 | const wasmInstance = await WebAssembly.instantiate(wasm) 127 | const json = persit.hibernate(wasmInstance.instance) 128 | 129 | const wasmInstance2 = await WebAssembly.instantiate(wasm) 130 | persit.resume(wasmInstance2.instance, json) 131 | const json2 = persit.hibernate(wasmInstance2.instance) 132 | t.deepEquals(json, json2) 133 | t.equals(Object.keys(wasmInstance.instance.exports).length, 3) 134 | 135 | t.end() 136 | }) 137 | 138 | tape('single i32 global', async t => { 139 | let wasm = fs.readFileSync(`${__dirname}/wasm/singleI32Global.wasm`) 140 | wasm = persit.prepare(wasm) 141 | const wasmInstance = await WebAssembly.instantiate(wasm) 142 | const json = persit.hibernate(wasmInstance.instance) 143 | t.deepEquals(json, {globals: [-2], table: [], symbol: '_'}) 144 | t.equals(Object.keys(wasmInstance.instance.exports).length, 4) 145 | 146 | t.end() 147 | }) 148 | 149 | tape('single i32 global', async t => { 150 | let wasm = fs.readFileSync(`${__dirname}/wasm/singleI32Global.wasm`) 151 | wasm = persit.prepare(wasm) 152 | const wasmInstance = await WebAssembly.instantiate(wasm) 153 | const json = persit.hibernate(wasmInstance.instance) 154 | t.deepEquals(json, {globals: [-2], table: [], symbol: '_'}) 155 | t.equals(Object.keys(wasmInstance.instance.exports).length, 4) 156 | 157 | json.globals[0] = 8 158 | const wasmInstance2 = await WebAssembly.instantiate(wasm) 159 | persit.resume(wasmInstance2.instance, json) 160 | const json2 = persit.hibernate(wasmInstance2.instance) 161 | t.deepEquals(json2, {globals: [8], table: [], symbol: '_'}) 162 | 163 | t.end() 164 | }) 165 | 166 | tape('single i64 global', async t => { 167 | let wasm = fs.readFileSync(`${__dirname}/wasm/singleI64Global.wasm`) 168 | wasm = persit.prepare(wasm) 169 | const wasmInstance = await WebAssembly.instantiate(wasm) 170 | const json = persit.hibernate(wasmInstance.instance) 171 | t.deepEquals(json, {globals: [[-1, -2]], table: [], symbol: '_'}) 172 | t.equals(Object.keys(wasmInstance.instance.exports).length, 5) 173 | 174 | t.end() 175 | }) 176 | 177 | tape('resuming i64 global', async t => { 178 | let wasm = fs.readFileSync(`${__dirname}/wasm/singleI64Global.wasm`) 179 | wasm = persit.prepare(wasm) 180 | const wasmInstance = await WebAssembly.instantiate(wasm) 181 | const json = {globals: [[99, 97]], table: [], symbol: '_'} 182 | persit.resume(wasmInstance.instance, json) 183 | const json2 = persit.hibernate(wasmInstance.instance) 184 | t.deepEquals(json, json2) 185 | t.equals(Object.keys(wasmInstance.instance.exports).length, 5) 186 | 187 | t.end() 188 | }) 189 | 190 | tape('skipping some globals', async t => { 191 | let wasm = fs.readFileSync(`${__dirname}/wasm/doubleGlobals.wasm`) 192 | wasm = persit.prepare(wasm, { 193 | globals: [true] 194 | }, '_@') 195 | const wasmInstance = await WebAssembly.instantiate(wasm) 196 | const json = persit.hibernate(wasmInstance.instance, '_@') 197 | t.deepEquals(json, {globals: [-2], table: [], symbol: '_@'}) 198 | t.equals(Object.keys(wasmInstance.instance.exports).length, 4) 199 | 200 | t.end() 201 | }) 202 | 203 | tape('skipping some globals', async t => { 204 | let wasm = fs.readFileSync(`${__dirname}/wasm/doubleGlobals.wasm`) 205 | wasm = persit.prepare(wasm, { 206 | globals: [false, true] 207 | }, '_@') 208 | const wasmInstance = await WebAssembly.instantiate(wasm) 209 | const json = persit.hibernate(wasmInstance.instance, '_@') 210 | t.deepEquals(json, {globals: [[-1, -2]], table: [], symbol: '_@'}) 211 | t.equals(Object.keys(wasmInstance.instance.exports).length, 5) 212 | 213 | t.end() 214 | }) 215 | 216 | tape('initailizing with missing values', async t => { 217 | let wasm = fs.readFileSync(`${__dirname}/wasm/doubleGlobals.wasm`) 218 | wasm = persit.prepare(wasm, { 219 | globals: [false, true] 220 | }, '_@') 221 | const wasmInstance = await WebAssembly.instantiate(wasm) 222 | const json = persit.hibernate(wasmInstance.instance, '_@') 223 | t.deepEquals(json, {globals: [[-1, -2]], table: [], symbol: '_@'}) 224 | t.equals(Object.keys(wasmInstance.instance.exports).length, 5) 225 | json.globals = [undefined] 226 | wasmInstance.instance.__hibernated = false 227 | persit.resume(wasmInstance.instance, json) 228 | const json2 = persit.hibernate(wasmInstance.instance, '_@') 229 | t.deepEquals(json2, {globals: [[-1, -2]], table: [], symbol: '_@'}) 230 | 231 | t.end() 232 | }) 233 | -------------------------------------------------------------------------------- /tests/wasm/customSections.wasm: -------------------------------------------------------------------------------- 1 | asmname -------------------------------------------------------------------------------- /tests/wasm/doubleGlobals.wasm: -------------------------------------------------------------------------------- 1 | asm` A~ ~B~ e 2 |  -------------------------------------------------------------------------------- /tests/wasm/empty.wasm: -------------------------------------------------------------------------------- 1 | asm -------------------------------------------------------------------------------- /tests/wasm/singleFunction.wasm: -------------------------------------------------------------------------------- 1 | asm`e 2 |  -------------------------------------------------------------------------------- /tests/wasm/singleGlobal.wasm: -------------------------------------------------------------------------------- 1 | asm`A~ e 2 |  -------------------------------------------------------------------------------- /tests/wasm/singleI32Global.wasm: -------------------------------------------------------------------------------- 1 | asm`A~ e 2 |  -------------------------------------------------------------------------------- /tests/wasm/singleI64Global.wasm: -------------------------------------------------------------------------------- 1 | asm`~B~ e 2 |  -------------------------------------------------------------------------------- /tests/wasm/singleImport.wasm: -------------------------------------------------------------------------------- 1 | asm`} foobar -------------------------------------------------------------------------------- /tests/wasm/singleMemory.wasm: -------------------------------------------------------------------------------- 1 | asm`e 2 |  A hi -------------------------------------------------------------------------------- /tests/wasm/singleTable.wasm: -------------------------------------------------------------------------------- 1 | asm`pe A  2 |  -------------------------------------------------------------------------------- /tests/wasm/singleType.wasm: -------------------------------------------------------------------------------- 1 | asm` -------------------------------------------------------------------------------- /tests/wast/doubleGlobals.wast: -------------------------------------------------------------------------------- 1 | (module 2 | (global (mut i32) (i32.const -2)) 3 | (global (mut i64) (i64.const -2)) 4 | (func) 5 | (export "e" (func 0)) 6 | ) 7 | -------------------------------------------------------------------------------- /tests/wast/empty.wast: -------------------------------------------------------------------------------- 1 | (module) 2 | -------------------------------------------------------------------------------- /tests/wast/singleFunction.wast: -------------------------------------------------------------------------------- 1 | (module 2 | (func) 3 | (export "e" (func 0)) 4 | ) 5 | -------------------------------------------------------------------------------- /tests/wast/singleI32Global.wast: -------------------------------------------------------------------------------- 1 | (module 2 | (global $a (mut i32) (i32.const -2)) 3 | (func) 4 | (export "e" (func 0)) 5 | ) 6 | -------------------------------------------------------------------------------- /tests/wast/singleI64Global.wast: -------------------------------------------------------------------------------- 1 | (module 2 | (global $a (mut i64) (i64.const -2)) 3 | (func) 4 | (export "e" (func 0)) 5 | ) 6 | -------------------------------------------------------------------------------- /tests/wast/singleImport.wast: -------------------------------------------------------------------------------- 1 | (module 2 | (import "foo" "bar" (func (param f32))) 3 | ) 4 | -------------------------------------------------------------------------------- /tests/wast/singleMemory.wast: -------------------------------------------------------------------------------- 1 | (module 2 | (memory (data "hi")) 3 | (func) 4 | (export "e" (func 0)) 5 | ) 6 | -------------------------------------------------------------------------------- /tests/wast/singleTable.wast: -------------------------------------------------------------------------------- 1 | (module 2 | (table 1 1 anyfunc) 3 | (elem (i32.const 0) 0) 4 | (func) 5 | (export "e" (func 0)) 6 | ) 7 | -------------------------------------------------------------------------------- /tests/wast/singleType.wast: -------------------------------------------------------------------------------- 1 | (module 2 | (type (func (param i32) (result i32))) 3 | ) 4 | -------------------------------------------------------------------------------- /tests/wast2wasm.js: -------------------------------------------------------------------------------- 1 | const wabt = require('wabt') 2 | const fs = require('fs') 3 | 4 | function filesWast2wasm () { 5 | const srcFiles = fs.readdirSync(`${__dirname}/wast`) 6 | const wastFiles = srcFiles.filter(name => name.split('.').pop() === 'wast') 7 | for (let file of wastFiles) { 8 | const wat = fs.readFileSync(`${__dirname}/wast/${file}`).toString() 9 | file = file.split('.')[0] 10 | 11 | try { 12 | const mod = wabt.parseWat('module.wast', wat) 13 | const r = mod.toBinary({log: true}) 14 | let binary = Buffer.from(r.buffer) 15 | if (!WebAssembly.validate(binary)) { 16 | throw new Error('invalid wasm binary') 17 | } 18 | fs.writeFileSync(`${__dirname}/wasm/${file}.wasm`, binary) 19 | } catch (e) { 20 | console.log(`failed at ${file}`) 21 | console.log(e) 22 | } 23 | } 24 | } 25 | 26 | filesWast2wasm() 27 | --------------------------------------------------------------------------------