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// Flags: --experimental-wasi-unstable-preview1
'use strict';
const common = require('../common');
const assert = require('assert');
const vm = require('vm');
const { WASI } = require('wasi');
const fixtures = require('../common/fixtures');
const bufferSource = fixtures.readSync('simple.wasm');
(async () => {
{
// Verify that a WebAssembly.Instance is passed in.
const wasi = new WASI();
assert.throws(
() => { wasi.initialize(); },
{
code: 'ERR_INVALID_ARG_TYPE',
message: /"instance" argument must be of type object/
}
);
}
{
// Verify that the passed instance has an exports objects.
const wasi = new WASI({});
const wasm = await WebAssembly.compile(bufferSource);
const instance = await WebAssembly.instantiate(wasm);
Object.defineProperty(instance, 'exports', { get() { return null; } });
assert.throws(
() => { wasi.initialize(instance); },
{
code: 'ERR_INVALID_ARG_TYPE',
message: /"instance\.exports" property must be of type object/
}
);
}
{
// Verify that a _initialize() export was passed.
const wasi = new WASI({});
const wasm = await WebAssembly.compile(bufferSource);
const instance = await WebAssembly.instantiate(wasm);
Object.defineProperty(instance, 'exports', {
get() {
return {
_initialize: 5,
memory: new WebAssembly.Memory({ initial: 1 }),
};
},
});
assert.throws(
() => { wasi.initialize(instance); },
{
code: 'ERR_INVALID_ARG_TYPE',
message: /"instance\.exports\._initialize" property must be of type function/
}
);
}
{
// Verify that a _start export was not passed.
const wasi = new WASI({});
const wasm = await WebAssembly.compile(bufferSource);
const instance = await WebAssembly.instantiate(wasm);
Object.defineProperty(instance, 'exports', {
get() {
return {
_start() {},
_initialize() {},
memory: new WebAssembly.Memory({ initial: 1 }),
};
}
});
assert.throws(
() => { wasi.initialize(instance); },
{
code: 'ERR_INVALID_ARG_TYPE',
message: 'The "instance.exports._start" property must be' +
' undefined. Received function _start',
}
);
}
{
// Verify that a memory export was passed.
const wasi = new WASI({});
const wasm = await WebAssembly.compile(bufferSource);
const instance = await WebAssembly.instantiate(wasm);
Object.defineProperty(instance, 'exports', {
get() { return { _initialize() {} }; }
});
assert.throws(
() => { wasi.initialize(instance); },
{
code: 'ERR_INVALID_ARG_TYPE',
message: /"instance\.exports\.memory" property must be a WebAssembly\.Memory object/
}
);
}
{
// Verify that a WebAssembly.Instance from another VM context is accepted.
const wasi = new WASI({});
const instance = await vm.runInNewContext(`
(async () => {
const wasm = await WebAssembly.compile(bufferSource);
const instance = await WebAssembly.instantiate(wasm);
Object.defineProperty(instance, 'exports', {
get() {
return {
_initialize() {},
memory: new WebAssembly.Memory({ initial: 1 })
};
}
});
return instance;
})()
`, { bufferSource });
wasi.initialize(instance);
}
{
// Verify that initialize() can only be called once.
const wasi = new WASI({});
const wasm = await WebAssembly.compile(bufferSource);
const instance = await WebAssembly.instantiate(wasm);
Object.defineProperty(instance, 'exports', {
get() {
return {
_initialize() {},
memory: new WebAssembly.Memory({ initial: 1 })
};
}
});
wasi.initialize(instance);
assert.throws(
() => { wasi.initialize(instance); },
{
code: 'ERR_WASI_ALREADY_STARTED',
message: /^WASI instance has already started$/
}
);
}
})().then(common.mustCall());
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