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wasm: add more stubbed file operations #194

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Merged
syumai merged 1 commit into from
May 4, 2026
Merged

wasm: add more stubbed file operations #194

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14 changes: 10 additions & 4 deletions cmd/workers-assets-gen/assets/wasm_exec_tinygo.js
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Original file line number Diff line number Diff line change
Expand Up @@ -245,9 +245,11 @@
}

const timeOrigin = Date.now() - performance.now();
const wasi_EBADF = 8;
const wasi_ENOSYS = 52;
this.importObject = {
wasi_snapshot_preview1: {
// https://github.com/WebAssembly/WASI/blob/main/phases/snapshot/docs.md#fd_write
// https://github.com/WebAssembly/WASI/blob/snapshot-01/phases/snapshot/docs.md
fd_write: function(fd, iovs_ptr, iovs_len, nwritten_ptr) {
let nwritten = 0;
if (fd == 1) {
Expand Down Expand Up @@ -276,9 +278,13 @@
mem().setUint32(nwritten_ptr, nwritten, true);
return 0;
},
fd_close: () => 0, // dummy
fd_fdstat_get: () => 0, // dummy
fd_seek: () => 0, // dummy
fd_read: () => wasi_ENOSYS,
fd_close: () => wasi_ENOSYS,
fd_fdstat_get: () => wasi_ENOSYS,
fd_prestat_get: () => wasi_EBADF, // wasi-libc relies on this errno value
fd_prestat_dir_name: () => wasi_ENOSYS,
fd_seek: () => wasi_ENOSYS,
path_open: () => wasi_ENOSYS,
proc_exit: (code) => {
this.exited = true;
this.exitCode = code;
Expand Down
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