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![Leaf Petersen](/assets/img/avatar_default.png)
Change-Id: Ib33169c3e0ffc870915c189404074a1dea472546 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/196548 Reviewed-by: Bob Nystrom <rnystrom@google.com> Commit-Queue: Leaf Petersen <leafp@google.com>
215 lines
6.4 KiB
Dart
215 lines
6.4 KiB
Dart
// Copyright (c) 2019, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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//
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// Dart test programing for testing that optimizations do wrongly assume loads
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// from and stores to C memory are not aliased.
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//
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// SharedObjects=ffi_test_functions
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// VMOptions=--deterministic --optimization-counter-threshold=50
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// @dart = 2.9
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import 'dart:ffi';
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import "package:ffi/ffi.dart";
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import "package:expect/expect.dart";
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import 'ffi_test_helpers.dart';
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void main() {
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for (int i = 0; i < 100; ++i) {
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testNonAlias();
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testAliasCast();
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testAliasCast2();
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testAliasOffsetBy();
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testAliasOffsetBy2();
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testAliasElementAt();
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testAliasElementAt2();
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testAliasFromAddress();
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testAliasFromAddress2();
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testAliasFromAddressViaMemory();
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testAliasFromAddressViaMemory2();
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testAliasFromAddressViaNativeFunction();
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testAliasFromAddressViaNativeFunction2();
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testPartialOverlap();
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}
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}
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void testNonAlias() {
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final source = calloc<Int64>();
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source.value = 42;
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final int a = source.value;
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source.value = 1984;
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// alias.value should be re-executed, as we wrote to alias.
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Expect.notEquals(a, source.value);
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calloc.free(source);
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}
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void testAliasCast() {
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final source = calloc<Int64>();
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final alias = source.cast<Int8>().cast<Int64>();
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source.value = 42;
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final int a = source.value;
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alias.value = 1984;
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// source.value should be re-executed, we wrote alias which aliases source.
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Expect.notEquals(a, source.value);
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calloc.free(source);
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}
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void testAliasCast2() {
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final source = calloc<Int64>();
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final alias = source.cast<Int16>().cast<Int64>();
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final alias2 = source.cast<Int8>().cast<Int64>();
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alias.value = 42;
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final int a = alias.value;
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alias2.value = 1984;
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// alias.value should be re-executed, we wrote alias2 which aliases alias.
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Expect.notEquals(a, alias.value);
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calloc.free(source);
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}
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void testAliasOffsetBy() {
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final source = calloc<Int64>(2);
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final alias = source.offsetBy(8).offsetBy(-8);
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source.value = 42;
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final int a = source.value;
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alias.value = 1984;
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// source.value should be re-executed, we wrote alias which aliases source.
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Expect.notEquals(a, source.value);
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calloc.free(source);
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}
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void testAliasOffsetBy2() {
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final source = calloc<Int64>(3);
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final alias = source.offsetBy(16).offsetBy(-16);
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final alias2 = source.offsetBy(8).offsetBy(-8);
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alias.value = 42;
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final int a = alias.value;
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alias2.value = 1984;
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// alias.value should be re-executed, we wrote alias2 which aliases alias.
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Expect.notEquals(a, alias.value);
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calloc.free(source);
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}
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void testAliasElementAt() {
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final source = calloc<Int64>(2);
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final alias = source.elementAt(1).elementAt(-1);
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source.value = 42;
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final int a = source.value;
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alias.value = 1984;
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// source.value should be re-executed, we wrote alias which aliases source.
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Expect.notEquals(a, source.value);
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calloc.free(source);
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}
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void testAliasElementAt2() {
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final source = calloc<Int64>(3);
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final alias = source.elementAt(2).elementAt(-2);
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final alias2 = source.elementAt(1).elementAt(-1);
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alias.value = 42;
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final int a = alias.value;
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alias2.value = 1984;
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// alias.value should be re-executed, we wrote alias2 which aliases alias.
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Expect.notEquals(a, alias.value);
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calloc.free(source);
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}
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void testAliasFromAddress() {
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final source = calloc<Int64>();
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final alias = Pointer<Int64>.fromAddress(source.address);
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source.value = 42;
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final int a = source.value;
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alias.value = 1984;
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// source.value should be re-executed, we wrote alias which aliases source.
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Expect.notEquals(a, source.value);
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calloc.free(source);
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}
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void testAliasFromAddress2() {
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final source = calloc<Int64>();
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final alias = Pointer<Int64>.fromAddress(source.address);
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final alias2 = Pointer<Int64>.fromAddress(source.address);
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alias.value = 42;
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final int a = alias.value;
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alias2.value = 1984;
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// alias.value should be re-executed, we wrote alias2 which aliases alias.
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Expect.notEquals(a, alias.value);
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calloc.free(source);
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}
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void testAliasFromAddressViaMemory() {
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final helper = calloc<IntPtr>();
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final source = calloc<Int64>();
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helper.value = source.address;
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final alias = Pointer<Int64>.fromAddress(helper.value);
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source.value = 42;
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final int a = source.value;
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alias.value = 1984;
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// source.value should be re-executed, we wrote alias which aliases source.
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Expect.notEquals(a, source.value);
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calloc.free(helper);
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calloc.free(source);
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}
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void testAliasFromAddressViaMemory2() {
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final helper = calloc<IntPtr>();
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final source = calloc<Int64>();
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helper.value = source.address;
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final alias = Pointer<Int64>.fromAddress(helper.value);
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final alias2 = Pointer<Int64>.fromAddress(helper.value);
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alias.value = 42;
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final int a = alias.value;
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alias2.value = 1984;
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// alias.value should be re-executed, we wrote alias2 which aliases alias.
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Expect.notEquals(a, alias.value);
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calloc.free(helper);
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calloc.free(source);
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}
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typedef NativeQuadOpSigned = Int64 Function(Int8, Int16, Int32, Int64);
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typedef QuadOp = int Function(int, int, int, int);
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QuadOp intComputation = ffiTestFunctions
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.lookupFunction<NativeQuadOpSigned, QuadOp>("IntComputation");
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void testAliasFromAddressViaNativeFunction() {
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final source = calloc<Int64>();
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final alias =
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Pointer<Int64>.fromAddress(intComputation(0, 0, 0, source.address));
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source.value = 42;
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final int a = source.value;
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alias.value = 1984;
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// source.value should be re-executed, we wrote alias which aliases source.
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Expect.notEquals(a, source.value);
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calloc.free(source);
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}
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void testAliasFromAddressViaNativeFunction2() {
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final source = calloc<Int64>();
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final alias =
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Pointer<Int64>.fromAddress(intComputation(0, 0, 0, source.address));
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final alias2 =
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Pointer<Int64>.fromAddress(intComputation(0, 0, 0, source.address));
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alias.value = 42;
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final int a = alias.value;
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alias2.value = 1984;
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// alias.value should be re-executed, we wrote alias2 which aliases alias.
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Expect.notEquals(a, alias.value);
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calloc.free(source);
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}
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@pragma('vm:never-inline')
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Pointer<Int8> makeDerived(Pointer<Int64> source) =>
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source.offsetBy(7).cast<Int8>();
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testPartialOverlap() {
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final source = calloc<Int64>(2);
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final derived = makeDerived(source);
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source.value = 0x1122334455667788;
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final int value = source.value;
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derived.value = 0xaa;
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Expect.notEquals(value, source.value);
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calloc.free(source);
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}
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