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// Copyright 2016 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.
#include <stdlib.h>
#include "src/globals.h"
#include "src/heap/marking.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace v8 {
namespace internal {
TEST(Marking, TransitionWhiteBlackWhite) {
Bitmap* bitmap = reinterpret_cast<Bitmap*>(
calloc(Bitmap::kSize / kPointerSize, kPointerSize));
const int kLocationsSize = 3;
int position[kLocationsSize] = {
Bitmap::kBitsPerCell - 2, Bitmap::kBitsPerCell - 1, Bitmap::kBitsPerCell};
for (int i = 0; i < kLocationsSize; i++) {
MarkBit mark_bit = bitmap->MarkBitFromIndex(position[i]);
CHECK(Marking::IsWhite(mark_bit));
CHECK(!Marking::IsImpossible(mark_bit));
Marking::WhiteToBlack<AccessMode::NON_ATOMIC>(mark_bit);
CHECK(Marking::IsBlack(mark_bit));
CHECK(!Marking::IsImpossible(mark_bit));
Marking::MarkWhite(mark_bit);
CHECK(Marking::IsWhite(mark_bit));
CHECK(!Marking::IsImpossible(mark_bit));
}
free(bitmap);
}
TEST(Marking, TransitionWhiteGreyBlack) {
Bitmap* bitmap = reinterpret_cast<Bitmap*>(
calloc(Bitmap::kSize / kPointerSize, kPointerSize));
const int kLocationsSize = 3;
int position[kLocationsSize] = {
Bitmap::kBitsPerCell - 2, Bitmap::kBitsPerCell - 1, Bitmap::kBitsPerCell};
for (int i = 0; i < kLocationsSize; i++) {
MarkBit mark_bit = bitmap->MarkBitFromIndex(position[i]);
CHECK(Marking::IsWhite(mark_bit));
CHECK(!Marking::IsBlackOrGrey(mark_bit));
CHECK(!Marking::IsImpossible(mark_bit));
Marking::WhiteToGrey<AccessMode::NON_ATOMIC>(mark_bit);
CHECK(Marking::IsGrey(mark_bit));
CHECK(Marking::IsBlackOrGrey(mark_bit));
CHECK(!Marking::IsImpossible(mark_bit));
Marking::GreyToBlack<AccessMode::NON_ATOMIC>(mark_bit);
CHECK(Marking::IsBlack(mark_bit));
CHECK(Marking::IsBlackOrGrey(mark_bit));
CHECK(!Marking::IsImpossible(mark_bit));
Marking::MarkWhite(mark_bit);
CHECK(Marking::IsWhite(mark_bit));
CHECK(!Marking::IsImpossible(mark_bit));
}
free(bitmap);
}
TEST(Marking, SetAndClearRange) {
Bitmap* bitmap = reinterpret_cast<Bitmap*>(
calloc(Bitmap::kSize / kPointerSize, kPointerSize));
for (int i = 0; i < 3; i++) {
bitmap->SetRange(i, Bitmap::kBitsPerCell + i);
CHECK_EQ(reinterpret_cast<uint32_t*>(bitmap)[0], 0xFFFFFFFFu << i);
CHECK_EQ(reinterpret_cast<uint32_t*>(bitmap)[1], (1u << i) - 1);
bitmap->ClearRange(i, Bitmap::kBitsPerCell + i);
CHECK_EQ(reinterpret_cast<uint32_t*>(bitmap)[0], 0x0u);
CHECK_EQ(reinterpret_cast<uint32_t*>(bitmap)[1], 0x0u);
}
free(bitmap);
}
TEST(Marking, ClearMultipleRanges) {
Bitmap* bitmap = reinterpret_cast<Bitmap*>(
calloc(Bitmap::kSize / kPointerSize, kPointerSize));
CHECK(bitmap->AllBitsClearInRange(0, Bitmap::kBitsPerCell * 3));
bitmap->SetRange(0, Bitmap::kBitsPerCell * 3);
CHECK_EQ(reinterpret_cast<uint32_t*>(bitmap)[0], 0xFFFFFFFFu);
CHECK_EQ(reinterpret_cast<uint32_t*>(bitmap)[1], 0xFFFFFFFFu);
CHECK_EQ(reinterpret_cast<uint32_t*>(bitmap)[2], 0xFFFFFFFFu);
CHECK(bitmap->AllBitsSetInRange(0, Bitmap::kBitsPerCell * 3));
bitmap->ClearRange(Bitmap::kBitsPerCell / 2, Bitmap::kBitsPerCell);
bitmap->ClearRange(Bitmap::kBitsPerCell,
Bitmap::kBitsPerCell + Bitmap::kBitsPerCell / 2);
bitmap->ClearRange(Bitmap::kBitsPerCell * 2 + 8,
Bitmap::kBitsPerCell * 2 + 16);
bitmap->ClearRange(Bitmap::kBitsPerCell * 2 + 24, Bitmap::kBitsPerCell * 3);
CHECK_EQ(reinterpret_cast<uint32_t*>(bitmap)[0], 0xFFFFu);
CHECK(bitmap->AllBitsSetInRange(0, Bitmap::kBitsPerCell / 2));
CHECK(bitmap->AllBitsClearInRange(Bitmap::kBitsPerCell / 2,
Bitmap::kBitsPerCell));
CHECK_EQ(reinterpret_cast<uint32_t*>(bitmap)[1], 0xFFFF0000u);
CHECK(
bitmap->AllBitsSetInRange(Bitmap::kBitsPerCell + Bitmap::kBitsPerCell / 2,
2 * Bitmap::kBitsPerCell));
CHECK(bitmap->AllBitsClearInRange(
Bitmap::kBitsPerCell, Bitmap::kBitsPerCell + Bitmap::kBitsPerCell / 2));
CHECK_EQ(reinterpret_cast<uint32_t*>(bitmap)[2], 0xFF00FFu);
CHECK(bitmap->AllBitsSetInRange(2 * Bitmap::kBitsPerCell,
2 * Bitmap::kBitsPerCell + 8));
CHECK(bitmap->AllBitsClearInRange(2 * Bitmap::kBitsPerCell + 24,
Bitmap::kBitsPerCell * 3));
free(bitmap);
}
} // namespace internal
} // namespace v8
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