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| <code>wamr</code> (WebAssembly Micro Runtime). For more information about current function |
| executors, please check <a href="/teaclave/executor/">this link</a>.</p> <p>However, sometimes platform providers may found current executors built in |
| Teaclave are not applicable for hosting some services, and they want to use |
| their own executor or an executor shipped by the third-party to execute their |
| code (for example, written languages other than Python or WASM). They can then |
| modify Teaclave's source code to add a customized executor to run their |
| functions.</p> <h2 id="steps-of-adding-a-new-executor"><a href="#steps-of-adding-a-new-executor" class="header-anchor">#</a> Steps of Adding a New Executor</h2> <p>Executors can be either linked to Teaclave as a third-party library (e.g. Mesapy |
| executor) or built in Teaclave itself (e.g. builtin executor). The source code |
| of either type is located at <code>executor/src/</code>. The general steps for adding a |
| custom executor can be summarized in the following steps:</p> <ol><li>Create a public executor unit struct and implement the <code>TeaclaveExecutor</code> trait.</li> <li>Re-export your new executor in <code>executor/src/lib.rs</code> to make it callable.</li> <li>Add enums in <code>ExecutorType</code> and <code>Executor</code> (in <code>types/src/worker.rs</code>), as |
| well as corresponding logics for handling the added enums.</li> <li>Import and register the added executor in <code>worker/src/worker.rs</code>.</li> <li>(Optional) Add unit test to your customized executor</li></ol> <h3 id="linking-related-libraries"><a href="#linking-related-libraries" class="header-anchor">#</a> Linking Related Libraries</h3> <p>If the custom executor is embedded or ported to Teaclave, <code>extern</code> functions |
| might be introduced into Teaclave and thus you also need to tell the build |
| system where to find the library containing these external functions. You may |
| add this library in the linking command at script |
| <code>cmake/scripts/sgx_link_sign.sh</code>. The linker will try to find the library in |
| <code>${TEACLAVE_OUT_DIR}</code>, which is be parsed to <code>build/intermediate</code> in build |
| phase. Besides, you can also add several lines to generate or download the |
| library in <code>CMakeList.txt</code>.</p> <h2 id="invoking-the-new-executor"><a href="#invoking-the-new-executor" class="header-anchor">#</a> Invoking the New Executor</h2> <p>Just call the API and remember to set <code>executor_type</code> to your new executor |
| type's name (the string used in <code>ExecutorType::try_from</code> match case) when |
| calling <code>register_function</code>, and set the <code>executor</code> to the executor's name |
| correspondingly.</p></div> <footer class="page-edit"><!----> <div class="last-updated"><span class="prefix">Last Updated:</span> <span class="time">6/18/2021, 5:39:00 PM</span></div></footer> <div class="page-nav"><p class="inner"><span class="prev"> |
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