1 files changed, 24 insertions, 0 deletions
diff --git a/src/etc/wasm32-shim.js b/src/etc/wasm32-shim.js
new file mode 100644
index 000000000..262a53eab
--- /dev/null
+++ b/src/etc/wasm32-shim.js
@@ -0,0 +1,24 @@
+// This is a small "shim" program which is used when wasm32 unit tests are run
+// in this repository. This program is intended to be run in node.js and will
+// load a wasm module into memory, instantiate it with a set of imports, and
+// then run it.
+//
+// There's a bunch of helper functions defined here in `imports.env`, but note
+// that most of them aren't actually needed to execute most programs. Many of
+// these are just intended for completeness or debugging. Hopefully over time
+// nothing here is needed for completeness.
+
+const fs = require('fs');
+const process = require('process');
+const buffer = fs.readFileSync(process.argv[2]);
+
+Error.stackTraceLimit = 20;
+
+let m = new WebAssembly.Module(buffer);
+let instance = new WebAssembly.Instance(m, {});
+try {
+  instance.exports.main();
+} catch (e) {
+  console.error(e);
+  process.exit(101);
+}