Collect type profile for DevTools.

test/inspector/type-profile/collect-type-profile-array-splice.js

+// Copyright 2017 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: --type-profile
+
+// Add mjsunit/array-splice.js as integration test for type profile.
+const expression = `
+function assertEquals() {
+}
+function assertFalse() {
+}
+function assertTrue() {
+}
+
+// Check that splicing array of holes keeps it as array of holes
+(function() {
+  for (var i = 0; i < 7; i++) {
+    var array = new Array(10);
+    var spliced = array.splice(1, 1, 'one', 'two');
+    assertEquals(1, spliced.length);
+    assertFalse(0 in spliced, "0 in spliced");
+
+    assertEquals(11, array.length);
+    assertFalse(0 in array, "0 in array");
+    assertTrue(1 in array);
+    assertTrue(2 in array);
+    assertFalse(3 in array, "3 in array");
+  }
+})();
+
+
+// Check various variants of empty array's splicing.
+(function() {
+  for (var i = 0; i < 7; i++) {
+    assertEquals([], [].splice(0, 0));
+    assertEquals([], [].splice(1, 0));
+    assertEquals([], [].splice(0, 1));
+    assertEquals([], [].splice(-1, 0));
+  }
+})();
+
+
+// Check that even if result array is empty, receiver gets sliced.
+(function() {
+  for (var i = 0; i < 7; i++) {
+    var a = [1, 2, 3];
+    assertEquals([], a.splice(1, 0, 'a', 'b', 'c'));
+    assertEquals([1, 'a', 'b', 'c', 2, 3], a);
+  }
+})();
+
+
+// Check various forms of arguments omission.
+(function() {
+  var array;
+  for (var i = 0; i < 7; i++) {
+    array = [1, 2, 3]
+    assertEquals([], array.splice());
+    assertEquals([1, 2, 3], array);
+
+    // SpiderMonkey, TraceMonkey and JSC treat the case where no delete count is
+    // given differently from when an undefined delete count is given.
+    // This does not follow ECMA-262, but we do the same for
+    // compatibility.
+    array = [1, 2, 3]
+    assertEquals([1, 2, 3], array.splice(0));
+    assertEquals([], array);
+
+    array = [1, 2, 3]
+    assertEquals([1, 2, 3], array.splice(undefined));
+    assertEquals([], array);
+
+    array = [1, 2, 3]
+    assertEquals([1, 2, 3], array.splice("foobar"));
+    assertEquals([], array);
+
+    array = [1, 2, 3]
+    assertEquals([], array.splice(undefined, undefined));
+    assertEquals([1, 2, 3], array);
+
+    array = [1, 2, 3]
+    assertEquals([], array.splice("foobar", undefined));
+    assertEquals([1, 2, 3], array);
+
+    array = [1, 2, 3]
+    assertEquals([], array.splice(undefined, "foobar"));
+    assertEquals([1, 2, 3], array);
+
+    array = [1, 2, 3]
+    assertEquals([], array.splice("foobar", "foobar"));
+    assertEquals([1, 2, 3], array);
+  }
+})();
+
+
+// Check variants of negatives and positive indices.
+(function() {
+  var array, spliced;
+  for (var i = 0; i < 7; i++) {
+    array = [1, 2, 3, 4, 5, 6, 7];
+    spliced = array.splice(-100);
+    assertEquals([], array);
+    assertEquals([1, 2, 3, 4, 5, 6, 7], spliced);
+
+    array = [1, 2, 3, 4, 5, 6, 7];
+    spliced = array.splice(-1e100);
+    assertEquals([], array);
+    assertEquals([1, 2, 3, 4, 5, 6, 7], spliced);
+
+    array = [1, 2, 3, 4, 5, 6, 7];
+    spliced = array.splice(-3);
+    assertEquals([1, 2, 3, 4], array);
+    assertEquals([5, 6, 7], spliced);
+
+    array = [1, 2, 3, 4, 5, 6, 7];
+    spliced = array.splice(-3.999999);
+    assertEquals([1, 2, 3, 4], array);
+    assertEquals([5, 6, 7], spliced);
+
+    array = [1, 2, 3, 4, 5, 6, 7];
+    spliced = array.splice(-3.000001);
+    assertEquals([1, 2, 3, 4], array);
+    assertEquals([5, 6, 7], spliced);
+
+    array = [1, 2, 3, 4, 5, 6, 7];
+    spliced = array.splice(4);
+    assertEquals([1, 2, 3, 4], array);
+    assertEquals([5, 6, 7], spliced);
+
+    array = [1, 2, 3, 4, 5, 6, 7];
+    spliced = array.splice(4.999999);
+    assertEquals([1, 2, 3, 4], array);
+    assertEquals([5, 6, 7], spliced);
+
+    array = [1, 2, 3, 4, 5, 6, 7];
+    spliced = array.splice(4.000001);
+    assertEquals([1, 2, 3, 4], array);
+    assertEquals([5, 6, 7], spliced);
+
+    array = [1, 2, 3, 4, 5, 6, 7];
+    spliced = array.splice(6);
+    assertEquals([1, 2, 3, 4, 5, 6], array);
+    assertEquals([7], spliced);
+
+    array = [1, 2, 3, 4, 5, 6, 7];
+    spliced = array.splice(7);
+    assertEquals([1, 2, 3, 4, 5, 6, 7], array);
+    assertEquals([], spliced);
+
+    array = [1, 2, 3, 4, 5, 6, 7];
+    spliced = array.splice(8);
+    assertEquals([1, 2, 3, 4, 5, 6, 7], array);
+    assertEquals([], spliced);
+
+    array = [1, 2, 3, 4, 5, 6, 7];
+    spliced = array.splice(100);
+    assertEquals([1, 2, 3, 4, 5, 6, 7], array);
+    assertEquals([], spliced);
+
+    array = [1, 2, 3, 4, 5, 6, 7];
+    spliced = array.splice(1e100);
+    assertEquals([1, 2, 3, 4, 5, 6, 7], array);
+    assertEquals([], spliced);
+
+    array = [1, 2, 3, 4, 5, 6, 7];
+    spliced = array.splice(0, -100);
+    assertEquals([1, 2, 3, 4, 5, 6, 7], array);
+    assertEquals([], spliced);
+
+    array = [1, 2, 3, 4, 5, 6, 7];
+    spliced = array.splice(0, -1e100);
+    assertEquals([1, 2, 3, 4, 5, 6, 7], array);
+    assertEquals([], spliced);
+
+    array = [1, 2, 3, 4, 5, 6, 7];
+    spliced = array.splice(0, -3);
+    assertEquals([1, 2, 3, 4, 5, 6, 7], array);
+    assertEquals([], spliced);
+
+    array = [1, 2, 3, 4, 5, 6, 7];
+    spliced = array.splice(0, -3.999999);
+    assertEquals([1, 2, 3, 4, 5, 6, 7], array);
+    assertEquals([], spliced);
+
+    array = [1, 2, 3, 4, 5, 6, 7];
+    spliced = array.splice(0, -3.000001);
+    assertEquals([1, 2, 3, 4, 5, 6, 7], array);
+    assertEquals([], spliced);
+
+    array = [1, 2, 3, 4, 5, 6, 7];
+    spliced = array.splice(0, 4);
+    assertEquals([5, 6, 7], array);
+    assertEquals([1, 2, 3, 4], spliced);
+
+    array = [1, 2, 3, 4, 5, 6, 7];
+    spliced = array.splice(0, 4.999999);
+    assertEquals([5, 6, 7], array);
+    assertEquals([1, 2, 3, 4], spliced);
+
+    array = [1, 2, 3, 4, 5, 6, 7];
+    spliced = array.splice(0, 4.000001);
+    assertEquals([5, 6, 7], array);
+    assertEquals([1, 2, 3, 4], spliced);
+
+    array = [1, 2, 3, 4, 5, 6, 7];
+    spliced = array.splice(0, 6);
+    assertEquals([7], array);
+    assertEquals([1, 2, 3, 4, 5, 6], spliced);
+
+    array = [1, 2, 3, 4, 5, 6, 7];
+    spliced = array.splice(0, 7);
+    assertEquals([], array);
+    assertEquals([1, 2, 3, 4, 5, 6, 7], spliced);
+
+    array = [1, 2, 3, 4, 5, 6, 7];
+    spliced = array.splice(0, 8);
+    assertEquals([], array);
+    assertEquals([1, 2, 3, 4, 5, 6, 7], spliced);
+
+    array = [1, 2, 3, 4, 5, 6, 7];
+    spliced = array.splice(0, 100);
+    assertEquals([], array);
+    assertEquals([1, 2, 3, 4, 5, 6, 7], spliced);
+
+    array = [1, 2, 3, 4, 5, 6, 7];
+    spliced = array.splice(0, 1e100);
+    assertEquals([], array);
+    assertEquals([1, 2, 3, 4, 5, 6, 7], spliced);
+
+    // Some exotic cases.
+    obj = { toString: function() { throw 'Exception'; } };
+
+    // Throwing an exception in conversion:
+    try {
+      [1, 2, 3].splice(obj, 3);
+      throw 'Should have thrown';
+    } catch (e) {
+      assertEquals('Exception', e);
+    }
+
+    try {
+      [1, 2, 3].splice(0, obj, 3);
+      throw 'Should have thrown';
+    } catch (e) {
+      assertEquals('Exception', e);
+    }
+
+    array = [1, 2, 3];
+    array.splice(0, 3, obj);
+    assertEquals(1, array.length);
+
+    // Custom conversion:
+    array = [1, 2, 3];
+    spliced = array.splice({valueOf: function() { return 1; }},
+      {toString: function() { return 2; }},
+      'one', 'two');
+    assertEquals([2, 3], spliced);
+    assertEquals([1, 'one', 'two'], array);
+  }
+})();
+
+
+// Nasty: modify the array in ToInteger.
+(function() {
+  var array = [];
+  var spliced;
+
+  for (var i = 0; i < 13; i++) {
+    bad_start = { valueOf: function() { array.push(2*i); return -1; } };
+    bad_count = { valueOf: function() { array.push(2*i + 1); return 1; } };
+    spliced = array.splice(bad_start, bad_count);
+    // According to the spec (15.4.4.12), length is calculated before
+    // performing ToInteger on arguments.  However, v8 ignores elements
+    // we add while converting, so we need corrective pushes.
+    array.push(2*i); array.push(2*i + 1);
+    if (i == 0) {
+      assertEquals([], spliced);  // Length was 0, nothing to get.
+      assertEquals([0, 1], array);
+    } else {
+      // When we start splice, array is [0 .. 2*i - 1], so we get
+      // as a result [2*i], this element is removed from the array,
+      // but [2 * i, 2 * i + 1] are added.
+      assertEquals([2 * i - 1], spliced);
+      assertEquals(2 * i, array[i]);
+      assertEquals(2 * i + 1, array[i + 1]);
+    }
+  }
+})();
+
+// Check the behaviour when approaching maximal values for length.
+(function() {
+  for (var i = 0; i < 7; i++) {
+    try {
+      new Array(Math.pow(2, 32) - 3).splice(-1, 0, 1, 2, 3, 4, 5);
+      throw 'Should have thrown RangeError';
+    } catch (e) {
+      assertTrue(e instanceof RangeError);
+    }
+
+    // Check smi boundary
+    var bigNum = (1 << 30) - 3;
+    var array = new Array(bigNum);
+    array.splice(-1, 0, 1, 2, 3, 4, 5, 6, 7);
+    assertEquals(bigNum + 7, array.length);
+  }
+})();
+
+(function() {
+  for (var i = 0; i < 7; i++) {
+    var a = [7, 8, 9];
+    a.splice(0, 0, 1, 2, 3, 4, 5, 6);
+    assertEquals([1, 2, 3, 4, 5, 6, 7, 8, 9], a);
+    assertFalse(a.hasOwnProperty(10), "a.hasOwnProperty(10)");
+    assertEquals(undefined, a[10]);
+  }
+})();
+
+(function testSpliceDeleteDouble() {
+  var a = [1.1, 1.2, 1.3, 1.4];
+  a.splice(2, 1)
+  assertEquals([1.1, 1.2, 1.4], a);
+})();
+
+// Past this point the ArrayProtector is invalidated since we modify the
+// Array.prototype.
+
+// Check the case of JS builtin .splice()
+(function() {
+  for (var i = 0; i < 7; i++) {
+    var array = [1, 2, 3, 4];
+    Array.prototype[3] = 'foo';  // To force JS builtin.
+
+    var spliced = array.splice();
+
+    assertEquals([], spliced);
+    assertEquals([1, 2, 3, 4], array);
+  }
+})();
+
+// Now check the case with array of holes and some elements on prototype.
+(function() {
+  var len = 9;
+
+  var at3 = "@3";
+  var at7 = "@7";
+
+  for (var i = 0; i < 7; i++) {
+    var array = new Array(len);
+    var array_proto = [];
+    array_proto[3] = at3;
+    array_proto[7] = at7;
+    array.__proto__ = array_proto;
+
+    var spliced = array.splice(2, 2, 'one', undefined, 'two');
+
+    // Second hole (at index 3) of array turns into
+    // value of Array.prototype[3] while copying.
+    assertEquals([, at3], spliced);
+    assertEquals([, , 'one', undefined, 'two', , , at7, at7, ,], array);
+
+    // ... but array[3] and array[7] is actually a hole:
+    assertTrue(delete array_proto[3]);
+    assertEquals(undefined, array[3]);
+    assertTrue(delete array_proto[7]);
+    assertEquals(undefined, array[7]);
+
+    // and now check hasOwnProperty
+    assertFalse(array.hasOwnProperty(0), "array.hasOwnProperty(0)");
+    assertFalse(array.hasOwnProperty(1), "array.hasOwnProperty(1)");
+    assertTrue(array.hasOwnProperty(2));
+    assertTrue(array.hasOwnProperty(3));
+    assertTrue(array.hasOwnProperty(4));
+    assertFalse(array.hasOwnProperty(5), "array.hasOwnProperty(5)");
+    assertFalse(array.hasOwnProperty(6), "array.hasOwnProperty(6)");
+    assertFalse(array.hasOwnProperty(7), "array.hasOwnProperty(7)");
+    assertTrue(array.hasOwnProperty(8));
+    assertFalse(array.hasOwnProperty(9), "array.hasOwnProperty(9)");
+
+    // and now check couple of indices above length.
+    assertFalse(array.hasOwnProperty(10), "array.hasOwnProperty(10)");
+    assertFalse(array.hasOwnProperty(15), "array.hasOwnProperty(15)");
+    assertFalse(array.hasOwnProperty(31), "array.hasOwnProperty(31)");
+    assertFalse(array.hasOwnProperty(63), "array.hasOwnProperty(63)");
+    assertFalse(array.hasOwnProperty(Math.pow(2, 32) - 2),
+      "array.hasOwnProperty(Math.pow(2, 32) - 2)");
+  }
+})();
+
+// Now check the case with array of holes and some elements on prototype.
+(function() {
+  var len = 9;
+
+  var at3 = "@3";
+  var at7 = "@7";
+
+  for (var i = 0; i < 7; i++) {
+    var array = new Array(len);
+    Array.prototype[3] = at3;
+    Array.prototype[7] = at7;
+
+    var spliced = array.splice(2, 2, 'one', undefined, 'two');
+
+    // Second hole (at index 3) of array turns into
+    // value of Array.prototype[3] while copying.
+    assertEquals([, at3], spliced);
+    assertEquals([, , 'one', undefined, 'two', , , at7, at7, ,], array);
+
+    // ... but array[3] and array[7] is actually a hole:
+    assertTrue(delete Array.prototype[3]);
+    assertEquals(undefined, array[3]);
+    assertTrue(delete Array.prototype[7]);
+    assertEquals(undefined, array[7]);
+
+    // and now check hasOwnProperty
+    assertFalse(array.hasOwnProperty(0), "array.hasOwnProperty(0)");
+    assertFalse(array.hasOwnProperty(1), "array.hasOwnProperty(1)");
+    assertTrue(array.hasOwnProperty(2));
+    assertTrue(array.hasOwnProperty(3));
+    assertTrue(array.hasOwnProperty(4));
+    assertFalse(array.hasOwnProperty(5), "array.hasOwnProperty(5)");
+    assertFalse(array.hasOwnProperty(6), "array.hasOwnProperty(6)");
+    assertFalse(array.hasOwnProperty(7), "array.hasOwnProperty(7)");
+    assertTrue(array.hasOwnProperty(8));
+    assertFalse(array.hasOwnProperty(9), "array.hasOwnProperty(9)");
+
+    // and now check couple of indices above length.
+    assertFalse(array.hasOwnProperty(10), "array.hasOwnProperty(10)");
+    assertFalse(array.hasOwnProperty(15), "array.hasOwnProperty(15)");
+    assertFalse(array.hasOwnProperty(31), "array.hasOwnProperty(31)");
+    assertFalse(array.hasOwnProperty(63), "array.hasOwnProperty(63)");
+    assertFalse(array.hasOwnProperty(Math.pow(2, 32) - 2),
+      "array.hasOwnProperty(Math.pow(2, 32) - 2)");
+  }
+})();`;
+
+
+
+Protocol.Runtime.evaluate({ expression: expression })
+.then(function() {InspectorTest.completeTest();});