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Wasi Emscripten Host

This Kotlin Multiplatform library provides an experimental implementation of WebAssembly host functions from the Emscripten JS environment, and some functions defined in the WASI Preview 1 specification.
It is designed to work with JVM/Multiplatform WebAssembly runtimes such as GraalVM, Chicory, and Chasm.

The primary goal is to run WebAssembly binaries compiled with Emscripten in a JVM environment, without the need for a browser or JavaScript.

Currently, the library implements a limited subset of host functions needed to run a single-threaded version of SQLite compiled with Emscripten. It may also work in other cases. The WASI/Emscripten filesystem is partially implemented.

Usage​

Refer to the sections on integration with runtimes:

Releases​

The latest release is available on Maven Central.

repositories {
    mavenCentral()
}

Snapshot versions may be published to an own repository:

pluginManagement {
    repositories {
        maven {
            url = uri("https://maven.pixnews.ru")
            mavenContent {
                includeGroup("at.released.weh")
            }
        }
    }
}

Status and Future Plans​

The project is likely to be frozen. However, if there is interest or demand, we may implement the full set of WASI functions.

Here are some related projects:

  • wasm-sqlite-driver-binary SQLite binaries, the primary target for this library.
  • wasm-sqlite-open-helper Implementation of SQLiteDriver and SupportSQLiteOpenHelper.Factory based on SQLite compiled for Wasm. This is a project where this library is used.