v8/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 () {
  var builder = new WasmModuleBuilder();

  var sig_index = builder.addType(kSig_i_ii);
  builder.addImport("q", "add", sig_index);
  builder.addFunction("add", sig_index)
    .addBody([
      kExprGetLocal, 0, kExprGetLocal, 1, kExprCallFunction, 0
    ]);
  builder.addFunction("sub", sig_index)
    .addBody([
      kExprGetLocal, 0,             // --
      kExprGetLocal, 1,             // --
      kExprI32Sub,                  // --
    ]);
  builder.addFunction("main", kSig_i_iii)
    .addBody([
      kExprGetLocal, 1,
      kExprGetLocal, 2,
      kExprGetLocal, 0,
      kExprCallIndirect, sig_index, kTableZero
    ])
    .exportFunc()
  builder.appendToTable([1, 2, 3]);

  return builder.instantiate({q: {add: function(a, b) { return a + b | 0; }}});
})();

// Check the module exists.
assertFalse(module === undefined);
assertFalse(module === null);
assertFalse(module === 0);
assertEquals("object", typeof module.exports);
assertEquals("function", typeof module.exports.main);

assertEquals(5, module.exports.main(1, 12, 7));
assertEquals(19, module.exports.main(0, 12, 7));

assertTraps(kTrapFuncSigMismatch, "module.exports.main(2, 12, 33)");
assertTraps(kTrapFuncInvalid, "module.exports.main(3, 12, 33)");


module = (function () {
  var builder = new WasmModuleBuilder();

  var sig_i_ii = builder.addType(kSig_i_ii);
  var sig_i_i = builder.addType(kSig_i_i);
  var mul = builder.addImport("q", "mul", sig_i_ii);
  var add = builder.addFunction("add", sig_i_ii)
    .addBody([
      kExprGetLocal, 0,  // --
      kExprGetLocal, 1,  // --
      kExprI32Add        // --
    ]);
  var popcnt = builder.addFunction("popcnt", sig_i_i)
    .addBody([
      kExprGetLocal, 0,  // --
      kExprI32Popcnt     // --
    ]);
  var main = builder.addFunction("main", kSig_i_iii)
    .addBody([
      kExprGetLocal, 1,
      kExprGetLocal, 2,
      kExprGetLocal, 0,
      kExprCallIndirect, sig_i_ii, kTableZero
    ])
    .exportFunc();
  builder.appendToTable([mul.index, add.index, popcnt.index, main.index]);

  return builder.instantiate({q: {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)");

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, kTableZero])  // --
    .exportAs("main");

  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 f = AddFunctions(builder);
    builder.addFunction("main", kSig_i_ii)
      .addBody([
        kExprI32Const, 33,  // --
        kExprGetLocal, 0,   // --
        kExprGetLocal, 1,   // --
        kExprCallIndirect, 0, kTableZero])  // --
      .exportAs("main");

    builder.setFunctionTableLength(length);
    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 f = AddFunctions(builder);
  builder.addFunction("main", kSig_i_ii)
    .addBody([
      kExprI32Const, 33,  // --
      kExprGetLocal, 0,   // --
      kExprGetLocal, 1,   // --
      kExprCallIndirect, 0, kTableZero])  // --
    .exportAs("main");

  builder.setFunctionTableLength(10);
  var g = builder.addImportedGlobal("fff", "base", kWasmI32);
  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, {fff: {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)");
  }
})();