test/mjsunit/wasm/stackwalk.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 --expose-gc --allow-natives-syntax

load("test/mjsunit/wasm/wasm-constants.js");
load("test/mjsunit/wasm/wasm-module-builder.js");

function makeFFI(func) {
  var builder = new WasmModuleBuilder();

  var sig_index = builder.addSignature([kAstI32, kAstF64, kAstF64]);
  builder.addImport("func", sig_index);
  builder.addFunction("main", sig_index)
    .addBody([
      kExprCallImport, 0,       // --
      kExprGetLocal, 0,         // --
      kExprGetLocal, 1])        // --
    .exportFunc()

  return builder.instantiate({func: func}).exports.main;
}


function makeReentrantFFI(func) {
  var main = makeFFI(reenter);

  function reenter(a, b) {
    print(" reenter " + a);
    if (a > 0) main(a - 1, b);
    else func();
  }
  return main;
}


function runTest(builder) {
  // ---- THROWING TEST -----------------------------------------------

  function throwadd(a, b) {
    print("-- trying throw --");
    throw a + b;
  }

  function throwa(a) {
    print("-- trying throw --");
    throw a;
  }

  function throwstr() {
    print("-- trying throw --");
    throw "string";
  }

  assertThrows(builder(throwadd));
  assertThrows(builder(throwa));
  assertThrows(builder(throwstr));

  try {
    builder(throwadd)(7.8, 9.9);
  } catch(e) {
    print(e);
  }

  try {
    builder(throwa)(11.8, 9.3);
  } catch(e) {
    print(e);
  }


  try {
    builder(throwstr)(3, 5);
  } catch(e) {
    print(e);
  }


  // ---- DEOPT TEST -----------------------------------------------

  function deopt() {
    print("-- trying deopt --");
    %DeoptimizeFunction(deopter);
  }

  var deopter = builder(deopt);

  deopter(5, 5);
  for (var i = 0; i < 9; i++) {
    deopter(6, 6);
  }


  // ---- GC TEST -----------------------------------------------
  function dogc(a, b) {
    print("-- trying gc --");
    gc();
    gc();
  }


  var gcer = builder(dogc);
  gcer(7, 7);

  for (var i = 0; i < 9; i++) {
    gcer(8, 8);
  }
}

runTest(makeReentrantFFI);
runTest(makeFFI);