worker: update symbols, build of lib, and some misc debugging

Author: progrium

runtime/wasi/worker/lib.js

@@ -4277,6 +4277,9 @@ var FileHandle = class extends WanixHandle {
     }
     const count = buffer.byteLength;
     const data = this.caller.call("fd_read", { fd: this.fd, count, at });
+    if (data === null) {
+      return 0;
+    }
     let writeBuffer3;
     if (buffer instanceof ArrayBuffer) {
       writeBuffer3 = new Uint8Array(buffer);

runtime/wasi/worker/worker.js

@@ -1,5 +1,5 @@
 import { 
-    WanixFS,
+    WanixHandle,
 	CallBuffer, 
 	WASI, 
     WASIProcExit,
@@ -24,7 +24,7 @@ self.onmessage = async (e) => {
 }
 
 async function initializeSyncWorker(e) {
-    const fs = new WanixFS(e.data.worker.fsys);
+    const fs = new WanixHandle(e.data.worker.sys);
     const pid = e.data.worker.env.pid;
     const env = (await fs.readText(`task/${pid}/env`)).trim().split("\n");
     const args = (await fs.readText(`task/${pid}/cmd`)).trim().split(" ");
@@ -156,13 +156,16 @@ async function runWasi(e) {
 	const inst = await WebAssembly.instantiate(wasm, imports);
     const wasmString = new TextDecoder('utf-8', { ignoreBOM: true, fatal: false }).decode(e.data.bin);
     let code = 0;
+	let start = performance.now();
 	// split so we don't trigger the tinygo check itself by being in the embedded source
 	if (wasmString.includes(["t","i","n","y","g","o","_","l","a","u","n","c","h"].join(""))) {
         wasi.initialize(inst);
         code = await go.run(inst);
     } else {
         code = wasi.start(inst);
     }
+	const end = performance.now();
+	// console.log(`wasi execution took ${end - start}ms`);
 	caller.call("exit", {code});
 }