v8/test/mjsunit/wasm/export-table.js

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// Copyright 2016 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// Flags: --expose-wasm
load("test/mjsunit/wasm/wasm-constants.js");
load("test/mjsunit/wasm/wasm-module-builder.js");
(function testExportedMain() {
print("TestExportedMain...");
var kReturnValue = 88;
var builder = new WasmModuleBuilder();
builder.addFunction("main", kSig_i_v)
.addBody([
kExprI8Const,
kReturnValue,
kExprReturn
])
.exportFunc();
var module = builder.instantiate();
assertEquals("object", typeof module.exports);
assertEquals("function", typeof module.exports.main);
assertEquals(kReturnValue, module.exports.main());
})();
(function testExportedTwice() {
print("TestExportedTwice...");
var kReturnValue = 99;
var builder = new WasmModuleBuilder();
builder.addFunction("main", kSig_i_v)
.addBody([
kExprI8Const,
kReturnValue,
kExprReturn
])
.exportAs("blah")
.exportAs("foo");
var module = builder.instantiate();
assertEquals("object", typeof module.exports);
assertEquals("function", typeof module.exports.blah);
assertEquals("function", typeof module.exports.foo);
assertEquals(kReturnValue, module.exports.foo());
assertEquals(kReturnValue, module.exports.blah());
assertSame(module.exports.blah, module.exports.foo);
})();
(function testEmptyName() {
print("TestEmptyName...");
var kReturnValue = 93;
var builder = new WasmModuleBuilder();
builder.addFunction("main", kSig_i_v)
.addBody([
kExprI8Const,
kReturnValue,
kExprReturn
])
.exportAs("");
var module = builder.instantiate();
assertEquals("object", typeof module.exports);
assertEquals("function", typeof module.exports[""]);
assertEquals(kReturnValue, module.exports[""]());
})();
(function testNumericName() {
print("TestNumericName...");
var kReturnValue = 93;
var builder = new WasmModuleBuilder();
builder.addFunction("main", kSig_i_v)
.addBody([
kExprI8Const,
kReturnValue,
kExprReturn
])
.exportAs("0");
var module = builder.instantiate();
assertEquals("object", typeof module.exports);
assertEquals("function", typeof module.exports["0"]);
assertEquals(kReturnValue, module.exports["0"]());
})();
(function testExportNameClash() {
print("TestExportNameClash...");
var builder = new WasmModuleBuilder();
builder.addFunction("one", kSig_v_v).addBody([kExprNop]).exportAs("main");
builder.addFunction("two", kSig_v_v).addBody([kExprNop]).exportAs("other");
builder.addFunction("three", kSig_v_v).addBody([kExprNop]).exportAs("main");
try {
builder.instantiate();
assertUnreachable("should have thrown an exception");
} catch (e) {
assertContains("Duplicate export", e.toString());
}
})();
(function testExportMultipleIdentity() {
print("TestExportMultipleIdentity...");
var builder = new WasmModuleBuilder();
var f = builder.addFunction("one", kSig_v_v).addBody([kExprNop])
.exportAs("a")
.exportAs("b")
.exportAs("c");
let instance = builder.instantiate();
let e = instance.exports;
assertEquals("function", typeof e.a);
assertEquals("function", typeof e.b);
assertEquals("function", typeof e.c);
assertSame(e.a, e.b);
assertSame(e.a, e.c);
assertEquals(String(f.index), e.a.name);
})();
(function testReexportJSMultipleIdentity() {
print("TestReexportMultipleIdentity...");
var builder = new WasmModuleBuilder();
function js() {}
var a = builder.addImport("m", "a", kSig_v_v);
builder.addExport("f", a);
builder.addExport("g", a);
let instance = builder.instantiate({m: {a: js}});
let e = instance.exports;
assertEquals("function", typeof e.f);
assertEquals("function", typeof e.g);
assertFalse(e.f == js);
assertFalse(e.g == js);
assertTrue(e.f == e.g);
})();
(function testReexportJSMultiple() {
print("TestReexportMultiple...");
var builder = new WasmModuleBuilder();
function js() {}
var a = builder.addImport("q", "a", kSig_v_v);
var b = builder.addImport("q", "b", kSig_v_v);
builder.addExport("f", a);
builder.addExport("g", b);
let instance = builder.instantiate({q: {a: js, b: js}});
let e = instance.exports;
assertEquals("function", typeof e.f);
assertEquals("function", typeof e.g);
assertFalse(e.f == js);
assertFalse(e.g == js);
assertFalse(e.f == e.g);
})();