// Copyright (c) 2019, the Dart project authors. Please see the AUTHORS file // for details. All rights reserved. Use of this source code is governed by a // BSD-style license that can be found in the LICENSE file. // Test the errors that can be thrown by WASI. import "package:expect/expect.dart"; import "package:wasm/wasm.dart"; import "dart:typed_data"; void main() { // Empty wasm module. var emptyModuleData = Uint8List.fromList( [0x00, 0x61, 0x73, 0x6d, 0x01, 0x00, 0x00, 0x00, 0x06, 0x81, 0x00, 0x00]); // Failed to fill WASI imports (the empty module was not built with WASI). Expect.throws(() => WasmModule(emptyModuleData).instantiate().enableWasi(), (Exception e) => "$e".contains("Failed to fill WASI imports")); // Hello world module generated by emscripten+WASI. Exports a function like // `void _start()`, and prints using `int fd_write(int, int, int, int)`. var helloWorldData = Uint8List.fromList([ 0x00, 0x61, 0x73, 0x6d, 0x01, 0x00, 0x00, 0x00, 0x01, 0x33, 0x09, 0x60, 0x03, 0x7f, 0x7f, 0x7f, 0x01, 0x7f, 0x60, 0x04, 0x7f, 0x7f, 0x7f, 0x7f, 0x01, 0x7f, 0x60, 0x00, 0x00, 0x60, 0x02, 0x7f, 0x7f, 0x01, 0x7f, 0x60, 0x01, 0x7f, 0x01, 0x7f, 0x60, 0x03, 0x7f, 0x7e, 0x7f, 0x01, 0x7e, 0x60, 0x00, 0x01, 0x7f, 0x60, 0x01, 0x7f, 0x00, 0x60, 0x03, 0x7f, 0x7f, 0x7f, 0x00, 0x02, 0x1a, 0x01, 0x0d, 0x77, 0x61, 0x73, 0x69, 0x5f, 0x75, 0x6e, 0x73, 0x74, 0x61, 0x62, 0x6c, 0x65, 0x08, 0x66, 0x64, 0x5f, 0x77, 0x72, 0x69, 0x74, 0x65, 0x00, 0x01, 0x03, 0x0f, 0x0e, 0x03, 0x04, 0x00, 0x03, 0x02, 0x07, 0x05, 0x04, 0x03, 0x06, 0x02, 0x02, 0x08, 0x00, 0x04, 0x05, 0x01, 0x70, 0x01, 0x04, 0x04, 0x05, 0x06, 0x01, 0x01, 0x80, 0x02, 0x80, 0x02, 0x06, 0x09, 0x01, 0x7f, 0x01, 0x41, 0xc0, 0x95, 0xc0, 0x02, 0x0b, 0x07, 0x2e, 0x04, 0x06, 0x6d, 0x65, 0x6d, 0x6f, 0x72, 0x79, 0x02, 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0x00, 0x41, 0x98, 0x08, 0x0b, 0x01, 0x05, 0x00, 0x41, 0xa4, 0x08, 0x0b, 0x01, 0x01, 0x00, 0x41, 0xbc, 0x08, 0x0b, 0x0e, 0x02, 0x00, 0x00, 0x00, 0x03, 0x00, 0x00, 0x00, 0xb8, 0x04, 0x00, 0x00, 0x00, 0x04, 0x00, 0x41, 0xd4, 0x08, 0x0b, 0x01, 0x01, 0x00, 0x41, 0xe3, 0x08, 0x0b, 0x05, 0x0a, 0xff, 0xff, 0xff, 0xff, ]); // Trying to import WASI twice. Expect.throws( () => WasmModule(helloWorldData).instantiate().enableWasi().enableWasi(), (Exception e) => "$e".contains("WASI is already enabled")); // Missing imports due to not enabling WASI. Expect.throws(() => WasmModule(helloWorldData).instantiate().build(), (Exception e) => "$e".contains("Missing import")); // Trying to get stdout/stderr without WASI enabled (WASI function import has // been manually filled). var inst = WasmModule(helloWorldData) .instantiate() .addFunction("wasi_unstable", "fd_write", (int fd, int iovs, int iovs_len, int unused) => 0) .build(); Expect.throws( () => inst.stdout, (Exception e) => "$e".contains("Can't capture stdout without WASI enabled")); Expect.throws( () => inst.stderr, (Exception e) => "$e".contains("Can't capture stderr without WASI enabled")); }