[wasm] Add support for exporting WebAssembly.Table instances.

test/mjsunit/wasm/indirect-calls.js

 // Copyright 2015 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");
 
 var module = (function () {
@@ skipping 55 matching lines @@
       kExprGetLocal, 0,  // --
       kExprI32Popcnt     // --
     ]);
   var main = builder.addFunction("main", kSig_i_iii)
     .addBody([
       kExprGetLocal, 1,
       kExprGetLocal, 2,
       kExprGetLocal, 0,
       kExprCallIndirect, sig_i_ii
     ])
-    .exportFunc()
+    .exportFunc();
   builder.appendToTable([mul.index, add.index, popcnt.index, main.index]);
 
   return builder.instantiate({mul: function(a, b) { return a * b | 0; }});
 })();
 
 assertEquals(-6, module.exports.main(0, -2, 3));
 assertEquals(99, module.exports.main(1, 22, 77));
 assertTraps(kTrapFuncSigMismatch, "module.exports.main(2, 12, 33)");
 assertTraps(kTrapFuncSigMismatch, "module.exports.main(3, 12, 33)");
 assertTraps(kTrapFuncInvalid, "module.exports.main(4, 12, 33)");
 
-
-module = (function () {
-  var builder = new WasmModuleBuilder();
-
+function AddFunctions(builder) {
   var mul = builder.addFunction("mul", kSig_i_ii)
     .addBody([
       kExprGetLocal, 0,  // --
       kExprGetLocal, 1,  // --
       kExprI32Mul        // --
     ]);
   var add = builder.addFunction("add", kSig_i_ii)
     .addBody([
       kExprGetLocal, 0,  // --
       kExprGetLocal, 1,  // --
       kExprI32Add        // --
     ]);
   var sub = builder.addFunction("sub", kSig_i_ii)
     .addBody([
       kExprGetLocal, 0,  // --
       kExprGetLocal, 1,  // --
       kExprI32Sub        // --
     ]);
+  return {mul: mul, add: add, sub: sub};
+}
+
+
+module = (function () {
+  var builder = new WasmModuleBuilder();
+
+  var f = AddFunctions(builder);
   builder.addFunction("main", kSig_i_ii)
     .addBody([
       kExprI32Const, 33,  // --
       kExprGetLocal, 0,   // --
       kExprGetLocal, 1,   // --
       kExprCallIndirect, 0])  // --
     .exportAs("main");
 
-  builder.appendToTable([mul.index, add.index, sub.index]);
+  builder.appendToTable([f.mul.index, f.add.index, f.sub.index]);
 
   return builder.instantiate();
 })();
 
 assertEquals(33, module.exports.main(1, 0));
 assertEquals(66, module.exports.main(2, 0));
 assertEquals(34, module.exports.main(1, 1));
 assertEquals(35, module.exports.main(2, 1));
 assertEquals(32, module.exports.main(1, 2));
 assertEquals(31, module.exports.main(2, 2));
 assertTraps(kTrapFuncInvalid, "module.exports.main(12, 3)");
 
 (function ConstBaseTest() {
   print("ConstBaseTest...");
   function instanceWithTable(base, length) {
     var builder = new WasmModuleBuilder();
 
-    var mul = builder.addFunction("mul", kSig_i_ii)
-        .addBody([
-          kExprGetLocal, 0,  // --
-          kExprGetLocal, 1,  // --
-          kExprI32Mul        // --
-        ]);
-    var add = builder.addFunction("add", kSig_i_ii)
-        .addBody([
-          kExprGetLocal, 0,  // --
-          kExprGetLocal, 1,  // --
-          kExprI32Add        // --
-        ]);
-    var sub = builder.addFunction("sub", kSig_i_ii)
-        .addBody([
-          kExprGetLocal, 0,  // --
-          kExprGetLocal, 1,  // --
-          kExprI32Sub        // --
-        ]);
+    var f = AddFunctions(builder);
     builder.addFunction("main", kSig_i_ii)
       .addBody([
         kExprI32Const, 33,  // --
         kExprGetLocal, 0,   // --
         kExprGetLocal, 1,   // --
         kExprCallIndirect, 0])  // --
       .exportAs("main");
 
     builder.setFunctionTableLength(length);
-    builder.addFunctionTableInit(base, false, [add.index, sub.index, mul.index]);
+    builder.addFunctionTableInit(base, false, [f.add.index, f.sub.index, f.mul.index]);
 
     return builder.instantiate();
   }
 
   for (var i = 0; i < 5; i++) {
     print(" base = " + i);
     var module = instanceWithTable(i, 10);
     main = module.exports.main;
     for (var j = 0; j < i; j++) {
       assertTraps(kTrapFuncSigMismatch, "main(12, " + j + ")");
     }
     assertEquals(34, main(1, i + 0));
     assertEquals(35, main(2, i + 0));
     assertEquals(32, main(1, i + 1));
     assertEquals(31, main(2, i + 1));
     assertEquals(33, main(1, i + 2));
     assertEquals(66, main(2, i + 2));
     assertTraps(kTrapFuncInvalid, "main(12, 10)");
   }
 })();
 
 (function GlobalBaseTest() {
   print("GlobalBaseTest...");
 
   var builder = new WasmModuleBuilder();
 
-  var mul = builder.addFunction("mul", kSig_i_ii)
-      .addBody([
-        kExprGetLocal, 0,  // --
-        kExprGetLocal, 1,  // --
-        kExprI32Mul        // --
-      ]);
-  var add = builder.addFunction("add", kSig_i_ii)
-      .addBody([
-        kExprGetLocal, 0,  // --
-        kExprGetLocal, 1,  // --
-        kExprI32Add        // --
-      ]);
-  var sub = builder.addFunction("sub", kSig_i_ii)
-      .addBody([
-        kExprGetLocal, 0,  // --
-        kExprGetLocal, 1,  // --
-        kExprI32Sub        // --
-      ]);
+  var f = AddFunctions(builder);
   builder.addFunction("main", kSig_i_ii)
     .addBody([
       kExprI32Const, 33,  // --
       kExprGetLocal, 0,   // --
       kExprGetLocal, 1,   // --
       kExprCallIndirect, 0])  // --
     .exportAs("main");
 
   builder.setFunctionTableLength(10);
   var g = builder.addImportedGlobal("base", undefined, kAstI32);
-  builder.addFunctionTableInit(g, true, [mul.index, add.index, sub.index]);
+  builder.addFunctionTableInit(g, true, [f.mul.index, f.add.index, f.sub.index]);
 
   var module = new WebAssembly.Module(builder.toBuffer());
 
   for (var i = 0; i < 5; i++) {
     print(" base = " + i);
     var instance = new WebAssembly.Instance(module, {base: i});
     main = instance.exports.main;
     for (var j = 0; j < i; j++) {
       assertTraps(kTrapFuncSigMismatch, "main(12, " + j + ")");
     }
     assertEquals(33, main(1, i + 0));
     assertEquals(66, main(2, i + 0));
     assertEquals(34, main(1, i + 1));
     assertEquals(35, main(2, i + 1));
     assertEquals(32, main(1, i + 2));
     assertEquals(31, main(2, i + 2));
     assertTraps(kTrapFuncInvalid, "main(12, 10)");
   }
 })();