Uses unsafe.String where possible

imports/wasi_snapshot_preview1/fs.go

@@ -1962,17 +1962,11 @@ func pathSymlinkFn(_ context.Context, mod api.Module, params []uint64) experimen
 	return dir.FS.Symlink(
 		// Do not join old path since it's only resolved when dereference the link created here.
 		// And the dereference result depends on the opening directory's file descriptor at that point.
-		bufToStr(oldPathBuf),
+		unsafe.String(&oldPathBuf[0], int(oldPathLen)),
 		newPathName,
 	)
 }
 
-// bufToStr converts the given byte slice as string unsafely.
-func bufToStr(buf []byte) string {
-	// TODO: use unsafe.String after flooring Go 1.20.
-	return *(*string)(unsafe.Pointer(&buf))
-}
-
 // pathUnlinkFile is the WASI function named PathUnlinkFileName which unlinks a
 // file.
 //

internal/wasm/binary/value.go

@@ -54,7 +54,6 @@ func decodeUTF8(r *bytes.Reader, contextFormat string, contextArgs ...interface{
 		return "", 0, fmt.Errorf("%s is not valid UTF-8", fmt.Sprintf(contextFormat, contextArgs...))
 	}
 
-	// TODO: use unsafe.String after flooring Go 1.20.
-	ret := *(*string)(unsafe.Pointer(&buf))
+	ret := unsafe.String(&buf[0], int(size))
 	return ret, size + uint32(sizeOfSize), nil
 }