Ryan Macnak
6fe15f6df9
This works around bugs in UndefinedBehaviorSanitizer and Clang. Bug: b/28638298 Change-Id: I6be595f9664516019d28017d24559583a1ae3a21 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/144354 Commit-Queue: Ryan Macnak <rmacnak@google.com> Reviewed-by: Vyacheslav Egorov <vegorov@google.com>
133 lines
3.7 KiB
C++
133 lines
3.7 KiB
C++
// Copyright (c) 2012, 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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#include "vm/bitmap.h"
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#include "platform/assert.h"
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#include "vm/code_descriptors.h"
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#include "vm/object.h"
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#include "vm/unit_test.h"
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namespace dart {
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// 0x4 is just a placeholder PC offset because no entry of a CSM should
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// have a PC offset of 0, otherwise internal assumptions break.
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static const uint32_t kTestPcOffset = 0x4;
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static const intptr_t kTestSpillSlotBitCount = 0;
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static CompressedStackMapsPtr MapsFromBuilder(BitmapBuilder* bmap) {
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CompressedStackMapsBuilder builder;
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builder.AddEntry(kTestPcOffset, bmap, kTestSpillSlotBitCount);
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return builder.Finalize();
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}
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ISOLATE_UNIT_TEST_CASE(BitmapBuilder) {
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// Test basic bit map builder operations.
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BitmapBuilder* builder1 = new BitmapBuilder();
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EXPECT_EQ(0, builder1->Length());
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bool value = true;
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for (int32_t i = 0; i < 128; i++) {
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builder1->Set(i, value);
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value = !value;
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}
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EXPECT_EQ(128, builder1->Length());
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value = true;
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for (int32_t i = 0; i < 128; i++) {
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EXPECT_EQ(value, builder1->Get(i));
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value = !value;
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}
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value = true;
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for (int32_t i = 0; i < 1024; i++) {
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builder1->Set(i, value);
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value = !value;
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}
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EXPECT_EQ(1024, builder1->Length());
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value = true;
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for (int32_t i = 0; i < 1024; i++) {
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EXPECT_EQ(value, builder1->Get(i));
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value = !value;
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}
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// Create a CompressedStackMaps object and verify its contents.
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const auto& maps1 = CompressedStackMaps::Handle(MapsFromBuilder(builder1));
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CompressedStackMapsIterator it1(maps1);
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EXPECT(it1.MoveNext());
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EXPECT_EQ(kTestPcOffset, it1.pc_offset());
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EXPECT_EQ(kTestSpillSlotBitCount, it1.SpillSlotBitCount());
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EXPECT_EQ(1024, it1.Length());
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value = true;
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for (int32_t i = 0; i < 1024; i++) {
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EXPECT_EQ(value, it1.IsObject(i));
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value = !value;
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}
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EXPECT(!it1.MoveNext());
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// Test the SetRange function in the builder.
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builder1->SetRange(0, 256, false);
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EXPECT_EQ(1024, builder1->Length());
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builder1->SetRange(257, 1024, true);
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EXPECT_EQ(1025, builder1->Length());
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builder1->SetRange(1025, 2048, false);
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EXPECT_EQ(2049, builder1->Length());
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for (int32_t i = 0; i <= 256; i++) {
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EXPECT(!builder1->Get(i));
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}
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for (int32_t i = 257; i <= 1024; i++) {
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EXPECT(builder1->Get(i));
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}
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for (int32_t i = 1025; i <= 2048; i++) {
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EXPECT(!builder1->Get(i));
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}
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const auto& maps2 = CompressedStackMaps::Handle(MapsFromBuilder(builder1));
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CompressedStackMapsIterator it2(maps2);
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EXPECT(it2.MoveNext());
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EXPECT_EQ(kTestPcOffset, it2.pc_offset());
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EXPECT_EQ(kTestSpillSlotBitCount, it2.SpillSlotBitCount());
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EXPECT_EQ(2049, it2.Length());
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for (int32_t i = 0; i <= 256; i++) {
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EXPECT(!it2.IsObject(i));
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}
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for (int32_t i = 257; i <= 1024; i++) {
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EXPECT(it2.IsObject(i));
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}
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for (int32_t i = 1025; i <= 2048; i++) {
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EXPECT(!it2.IsObject(i));
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}
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EXPECT(!it2.MoveNext());
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// Test using SetLength to shorten the builder, followed by lengthening.
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builder1->SetLength(747);
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EXPECT_EQ(747, builder1->Length());
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for (int32_t i = 257; i < 747; ++i) {
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EXPECT(builder1->Get(i));
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}
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builder1->Set(800, false);
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EXPECT_EQ(801, builder1->Length());
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for (int32_t i = 257; i < 747; ++i) {
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EXPECT(builder1->Get(i));
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}
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for (int32_t i = 747; i < 801; ++i) {
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EXPECT(!builder1->Get(i));
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}
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builder1->Set(900, true);
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EXPECT_EQ(901, builder1->Length());
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for (int32_t i = 257; i < 747; ++i) {
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EXPECT(builder1->Get(i));
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}
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for (int32_t i = 747; i < 900; ++i) {
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EXPECT(!builder1->Get(i));
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}
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EXPECT(builder1->Get(900));
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}
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} // namespace dart
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