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/*
* Copyright (C) 2017-2020 Intel Corporation
*
* SPDX-License-Identifier: MIT
*
*/
#include "shared/source/helpers/aligned_memory.h"
#include "gtest/gtest.h"
#include <cstdint>
TEST(AlignedFree, GivenNullPtrWhenFreeingAlignedThenNoCrash) {
alignedFree(nullptr);
}
void *ptrAlignedToPage = (void *)0x1000;
void *ptrNotAlignedToPage = (void *)0x1001;
struct AlignedMalloc : public ::testing::TestWithParam<size_t> {
public:
void SetUp() override {
ptr = nullptr;
alignAlloc = GetParam();
}
void TearDown() override {
alignedFree(ptr);
}
void *ptr;
size_t alignAlloc;
};
TEST_P(AlignedMalloc, GivenSizeZeroWhenAllocatingAlignedThenAlignedPointerIsReturned) {
size_t sizeAlloc = 0;
ptr = alignedMalloc(sizeAlloc, alignAlloc);
EXPECT_NE(nullptr, ptr);
EXPECT_EQ(0u, (uintptr_t)ptr % alignAlloc);
}
TEST_P(AlignedMalloc, GivenSize4096WhenAllocatingAlignedThenAlignedPointerIsReturned) {
size_t sizeAlloc = 4096;
ptr = alignedMalloc(sizeAlloc, alignAlloc);
EXPECT_NE(nullptr, ptr);
EXPECT_EQ(0u, (uintptr_t)ptr % alignAlloc);
}
TEST(AlignedMallocTests, GivenSizeZeroAndAlign4096WhenAllocatingAlignedThenAlignedPointerIsReturned) {
size_t sizeAlloc = 0;
auto ptr = alignedMalloc(sizeAlloc, 4096);
EXPECT_NE(nullptr, ptr);
EXPECT_EQ(0u, (uintptr_t)ptr % 4096);
alignedFree(ptr);
}
INSTANTIATE_TEST_CASE_P(
AlignedMallocParameterized,
AlignedMalloc,
testing::Values(
1,
4,
8,
64,
4096));
struct AlignUp : public ::testing::TestWithParam<size_t> {
};
TEST_P(AlignUp, GivenPointerBelowAlignmentWhenAligningUpThenReturnAlignedPointer) {
uintptr_t addrBefore = 0x1fffffff;
auto ptrBefore = (uint32_t *)addrBefore;
auto alignment = GetParam();
auto ptrAfter = alignUp(ptrBefore, alignment);
auto addrAfter = (uintptr_t)ptrAfter;
EXPECT_EQ(0u, addrAfter % alignment);
}
TEST_P(AlignUp, GivenPointerAtAlignmentWhenAligningUpThenReturnAlignedPointer) {
uintptr_t addrBefore = 0x20000000;
auto ptrBefore = (uint32_t *)addrBefore;
auto alignment = GetParam();
auto ptrAfter = alignUp(ptrBefore, alignment);
auto addrAfter = (uintptr_t)ptrAfter;
EXPECT_EQ(0u, addrAfter % alignment);
}
TEST_P(AlignUp, GivenPointerAboveAlignmentWhenAligningUpThenReturnAlignedPointer) {
uintptr_t addrBefore = 0x20000001;
auto ptrBefore = (uint32_t *)addrBefore;
auto alignment = GetParam();
auto ptrAfter = alignUp(ptrBefore, alignment);
auto addrAfter = (uintptr_t)ptrAfter;
EXPECT_EQ(0u, addrAfter % alignment);
}
TEST_P(AlignUp, WhenAligningUpThen64BitIsPreserved) {
uint64_t aligned = 1ULL << 48;
auto alignment = GetParam();
auto result = alignUp(aligned, alignment);
EXPECT_EQ(aligned, result);
}
INSTANTIATE_TEST_CASE_P(
AlignUpParameterized,
AlignUp,
testing::Values(
1,
4,
8,
32,
64,
256,
4096));
TEST(AlignWholeSize, GivenSizeLessThanPageSizeWhenAligningWholeSizeToPageThenAlignedSizeIsPageSize) {
int size = 1;
auto retSize = alignSizeWholePage(ptrAlignedToPage, size);
EXPECT_EQ(retSize, 4096u);
}
TEST(AlignWholeSize, GivenSizeGreaterThanPageSizeWhenAligningWholeSizeToPageThenAlignedSizeIsMultipleOfPageSize) {
int size = 4097;
auto retSize = alignSizeWholePage(ptrAlignedToPage, size);
EXPECT_EQ(retSize, 4096u * 2);
}
TEST(AlignWholeSize, GivenSizeGreaterThanPageSizeAndUnalignedPointerWhenAligningWholeSizeToPageThenAlignedSizeIsMultipleOfPageSize) {
int size = 4097;
auto retSize = alignSizeWholePage(ptrNotAlignedToPage, size);
EXPECT_EQ(retSize, 4096u * 2);
}
TEST(AlignWholeSize, GivenSizeOneAndUnalignedPointerWhenAligningWholeSizeToPageThenAlignedSizeIsPageSize) {
int size = 1;
auto retSize = alignSizeWholePage(ptrNotAlignedToPage, size);
EXPECT_EQ(retSize, 4096u);
}
TEST(AlignWholeSize, GivenSizeOneLessThanPageSizeAndUnalignedPointerWhenAligningWholeSizeToPageThenAlignedSizeIsPageSize) {
int size = 4095;
auto retSize = alignSizeWholePage(ptrNotAlignedToPage, size);
EXPECT_EQ(retSize, 4096u);
}
TEST(AlignWholeSize, GivenSizeOneLessThanTwoPageSizeAndUnalignedPointerWhenAligningWholeSizeToPageThenAlignedSizeIsTwoPageSize) {
int size = 4095 + 4096;
auto retSize = alignSizeWholePage(ptrNotAlignedToPage, size);
EXPECT_EQ(retSize, 4096u * 2);
}
TEST(AlignWholeSize, allocationOverlapsToAnotherPage) {
int size = 4096;
auto retSize = alignSizeWholePage(ptrNotAlignedToPage, size);
EXPECT_EQ(retSize, 4096u * 2);
}
TEST(AlignWholeSize, GivenSizeofTwoPagesAndUnalignedPointerWhenAligningWholeSizeToPageThenAlignedSizeIsThreePageSize) {
int size = 4096 * 2;
auto retSize = alignSizeWholePage(ptrNotAlignedToPage, size);
EXPECT_EQ(retSize, 4096u * 3);
}
TEST(AlignWholeSize, GivenSizeofTwoPagesAndAlignedPointerWhenAligningWholeSizeToPageThenAlignedSizeIsTwoPageSize) {
int size = 4096 * 2;
auto retSize = alignSizeWholePage(ptrAlignedToPage, size);
EXPECT_EQ(retSize, 4096u * 2);
}
TEST(AlignDown, GivenPtrAlignedToPageWhenAligningDownToPageSizeThenReturnTheSamePointer) {
void *ptr = (void *)0x1000;
auto alignedDownPtr = alignDown(ptr, MemoryConstants::pageSize);
EXPECT_EQ(ptr, alignedDownPtr);
}
TEST(AlignDown, GivenPtrNotAlignedToPageWhenAligningDownToPageSizeThenPageAlignedPointerIsReturned) {
void *ptr = (void *)0x1001;
void *expected_ptr = (void *)0x1000;
auto alignedDownPtr = alignDown(ptr, MemoryConstants::pageSize);
EXPECT_EQ(expected_ptr, alignedDownPtr);
}
TEST(AlignDown, GivenPtrNotAlignedToTwoPageWhenAligningDownToPageSizeThenReturnAlignedPointerToPreviousPage) {
void *ptr = (void *)0x1241;
void *expected_ptr = (void *)0x1000;
auto alignedDownPtr = alignDown(ptr, MemoryConstants::pageSize);
EXPECT_EQ(expected_ptr, alignedDownPtr);
}
TEST(AlignDown, GivenPtrNotAlignedToThreePageWhenAligningDownToPageSizeThenReturnAlignedPointerToPreviousPage) {
void *ptr = (void *)0x3241;
void *expected_ptr = (void *)0x3000;
auto alignedDownPtr = alignDown(ptr, MemoryConstants::pageSize);
EXPECT_EQ(expected_ptr, alignedDownPtr);
}
TEST(AlignDown, GivenPtrNotAlignedToDwordWhenAligningDownToDwordThenDwordAlignedPointerIsReturned) {
void *ptr = (void *)0x3241;
void *expected_ptr = (void *)0x3240;
auto alignedDownPtr = alignDown(ptr, 4);
EXPECT_EQ(expected_ptr, alignedDownPtr);
}
TEST(AlignDown, WhenAligningDownThen64BitIsPreserved) {
uint64_t aligned = 1ULL << 48;
auto result = alignDown(aligned, MemoryConstants::pageSize);
EXPECT_EQ(aligned, result);
}
TEST(DLLbitness, Given32or64BitLibraryWhenAskedIfItIs32BitThenProperValueIsReturned) {
auto pointerSize = sizeof(void *);
if (pointerSize == 8) {
EXPECT_FALSE(is32bit);
EXPECT_TRUE(is64bit);
} else if (pointerSize == 4) {
EXPECT_TRUE(is32bit);
EXPECT_FALSE(is64bit);
} else {
FAIL() << "unrecognized bitness";
}
auto pointerSizeFromSizeT = sizeof(size_t);
if (pointerSizeFromSizeT == 8) {
EXPECT_FALSE(is32bit);
EXPECT_TRUE(is64bit);
} else if (pointerSizeFromSizeT == 4) {
EXPECT_TRUE(is32bit);
EXPECT_FALSE(is64bit);
} else {
FAIL() << "unrecognized bitness";
}
}
template <typename T>
class IsAlignedTests : public ::testing::Test {
};
typedef ::testing::Types<int8_t, uint8_t, int16_t, uint16_t, int32_t, uint32_t, int64_t, uint64_t, float, double> IsAlignedTypes;
TYPED_TEST_CASE(IsAlignedTests, IsAlignedTypes);
TYPED_TEST(IsAlignedTests, WhenCheckingForAlignmentThenReturnCorrectValue) {
TypeParam *ptr = reinterpret_cast<TypeParam *>(static_cast<uintptr_t>(0xdeadbeefu));
// one byte alignment should always return true
if (alignof(TypeParam) == 1)
EXPECT_TRUE(isAligned(ptr));
else
EXPECT_FALSE(isAligned(ptr));
auto ptr1 = reinterpret_cast<TypeParam *>(reinterpret_cast<uintptr_t>(ptr) & ~(alignof(TypeParam) - 1));
EXPECT_TRUE(isAligned(ptr1));
auto ptr2 = reinterpret_cast<TypeParam *>(reinterpret_cast<uintptr_t>(ptr) & ~((alignof(TypeParam) << 1) - 1));
EXPECT_TRUE(isAligned(ptr2));
// this is hard to align in the middle of byte aligned types
if (alignof(TypeParam) == 1)
return;
auto ptr3 = reinterpret_cast<TypeParam *>(reinterpret_cast<uintptr_t>(ptr) & ~((alignof(TypeParam) >> 1) - 1));
EXPECT_FALSE(isAligned(ptr3));
}
TEST(IsAligned, GivenNonPointerTypeWhenCheckingForAlignmentThenReturnIsCorrect) {
EXPECT_TRUE(isAligned<3>(0));
EXPECT_FALSE(isAligned<3>(1));
EXPECT_FALSE(isAligned<3>(2));
EXPECT_TRUE(isAligned<3>(3));
EXPECT_FALSE(isAligned<3>(4));
EXPECT_FALSE(isAligned<3>(5));
EXPECT_TRUE(isAligned<3>(6));
}
TEST(IsAligned, WhenUsingConstexprEvaluationThenResultIsCorrect) {
static_assert(false == isAligned<3>(2), "");
static_assert(true == isAligned<3>(3), "");
}
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