+++ /dev/null
-// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
-// vim: ts=8 sw=2 smarttab
-#include "gtest/gtest.h"
-
-#include "os/memstore/PageSet.h"
-
-template <typename T>
-bool is_aligned(T* ptr) {
- const auto align_mask = alignof(T) - 1;
- return (reinterpret_cast<uintptr_t>(ptr) & align_mask) == 0;
-}
-
-TEST(PageSet, AllocAligned)
-{
- PageSet pages(1);
- PageSet::page_vector range;
-
- pages.alloc_range(0, 4, range);
- ASSERT_EQ(4u, range.size());
- ASSERT_EQ(0u, range[0]->offset);
- ASSERT_EQ(1u, range[1]->offset);
- ASSERT_EQ(2u, range[2]->offset);
- ASSERT_EQ(3u, range[3]->offset);
-
- // verify that the Page pointers are properly aligned
- ASSERT_TRUE(is_aligned(range[0].get()));
- ASSERT_TRUE(is_aligned(range[1].get()));
- ASSERT_TRUE(is_aligned(range[2].get()));
- ASSERT_TRUE(is_aligned(range[3].get()));
-}
-
-TEST(PageSet, AllocUnaligned)
-{
- PageSet pages(2);
- PageSet::page_vector range;
-
- // front of first page
- pages.alloc_range(0, 1, range);
- ASSERT_EQ(1u, range.size());
- ASSERT_EQ(0u, range[0]->offset);
- range.clear();
-
- // back of first page
- pages.alloc_range(1, 1, range);
- ASSERT_EQ(1u, range.size());
- ASSERT_EQ(0u, range[0]->offset);
- range.clear();
-
- // back of first page and front of second
- pages.alloc_range(1, 2, range);
- ASSERT_EQ(2u, range.size());
- ASSERT_EQ(0u, range[0]->offset);
- ASSERT_EQ(2u, range[1]->offset);
- range.clear();
-
- // back of first page and all of second
- pages.alloc_range(1, 3, range);
- ASSERT_EQ(2u, range.size());
- ASSERT_EQ(0u, range[0]->offset);
- ASSERT_EQ(2u, range[1]->offset);
- range.clear();
-
- // back of first page, all of second, and front of third
- pages.alloc_range(1, 4, range);
- ASSERT_EQ(3u, range.size());
- ASSERT_EQ(0u, range[0]->offset);
- ASSERT_EQ(2u, range[1]->offset);
- ASSERT_EQ(4u, range[2]->offset);
-}
-
-TEST(PageSet, GetAligned)
-{
- // allocate 4 pages
- PageSet pages(1);
- PageSet::page_vector range;
- pages.alloc_range(0, 4, range);
- range.clear();
-
- // get first page
- pages.get_range(0, 1, range);
- ASSERT_EQ(1u, range.size());
- ASSERT_EQ(0u, range[0]->offset);
- range.clear();
-
- // get second and third pages
- pages.get_range(1, 2, range);
- ASSERT_EQ(2u, range.size());
- ASSERT_EQ(1u, range[0]->offset);
- ASSERT_EQ(2u, range[1]->offset);
- range.clear();
-
- // get all four pages
- pages.get_range(0, 4, range);
- ASSERT_EQ(4u, range.size());
- ASSERT_EQ(0u, range[0]->offset);
- ASSERT_EQ(1u, range[1]->offset);
- ASSERT_EQ(2u, range[2]->offset);
- ASSERT_EQ(3u, range[3]->offset);
- range.clear();
-}
-
-TEST(PageSet, GetUnaligned)
-{
- // allocate 3 pages
- PageSet pages(2);
- PageSet::page_vector range;
- pages.alloc_range(0, 6, range);
- range.clear();
-
- // front of first page
- pages.get_range(0, 1, range);
- ASSERT_EQ(1u, range.size());
- ASSERT_EQ(0u, range[0]->offset);
- range.clear();
-
- // back of first page
- pages.get_range(1, 1, range);
- ASSERT_EQ(1u, range.size());
- ASSERT_EQ(0u, range[0]->offset);
- range.clear();
-
- // back of first page and front of second
- pages.get_range(1, 2, range);
- ASSERT_EQ(2u, range.size());
- ASSERT_EQ(0u, range[0]->offset);
- ASSERT_EQ(2u, range[1]->offset);
- range.clear();
-
- // back of first page and all of second
- pages.get_range(1, 3, range);
- ASSERT_EQ(2u, range.size());
- ASSERT_EQ(0u, range[0]->offset);
- ASSERT_EQ(2u, range[1]->offset);
- range.clear();
-
- // back of first page, all of second, and front of third
- pages.get_range(1, 4, range);
- ASSERT_EQ(3u, range.size());
- ASSERT_EQ(0u, range[0]->offset);
- ASSERT_EQ(2u, range[1]->offset);
- ASSERT_EQ(4u, range[2]->offset);
- range.clear();
-
- // back of third page with nothing beyond
- pages.get_range(5, 999, range);
- ASSERT_EQ(1u, range.size());
- ASSERT_EQ(4u, range[0]->offset);
- range.clear();
-}
-
-TEST(PageSet, GetHoles)
-{
- // allocate pages at offsets 1, 2, 5, and 7
- PageSet pages(1);
- PageSet::page_vector range;
- for (uint64_t i : {1, 2, 5, 7})
- pages.alloc_range(i, 1, range);
- range.clear();
-
- // nothing at offset 0, page at offset 1
- pages.get_range(0, 2, range);
- ASSERT_EQ(1u, range.size());
- ASSERT_EQ(1u, range[0]->offset);
- range.clear();
-
- // nothing at offset 0, pages at offset 1 and 2, nothing at offset 3
- pages.get_range(0, 4, range);
- ASSERT_EQ(2u, range.size());
- ASSERT_EQ(1u, range[0]->offset);
- ASSERT_EQ(2u, range[1]->offset);
- range.clear();
-
- // page at offset 2, nothing at offset 3 or 4
- pages.get_range(2, 3, range);
- ASSERT_EQ(1u, range.size());
- ASSERT_EQ(2u, range[0]->offset);
- range.clear();
-
- // get the full range
- pages.get_range(0, 999, range);
- ASSERT_EQ(4u, range.size());
- ASSERT_EQ(1u, range[0]->offset);
- ASSERT_EQ(2u, range[1]->offset);
- ASSERT_EQ(5u, range[2]->offset);
- ASSERT_EQ(7u, range[3]->offset);
- range.clear();
-}
-
-TEST(PageSet, FreeAligned)
-{
- // allocate 4 pages
- PageSet pages(1);
- PageSet::page_vector range;
- pages.alloc_range(0, 4, range);
- range.clear();
-
- // get the full range
- pages.get_range(0, 4, range);
- ASSERT_EQ(4u, range.size());
- range.clear();
-
- // free after offset 4 has no effect
- pages.free_pages_after(4);
- pages.get_range(0, 4, range);
- ASSERT_EQ(4u, range.size());
- range.clear();
-
- // free page 4
- pages.free_pages_after(3);
- pages.get_range(0, 4, range);
- ASSERT_EQ(3u, range.size());
- range.clear();
-
- // free pages 2 and 3
- pages.free_pages_after(1);
- pages.get_range(0, 4, range);
- ASSERT_EQ(1u, range.size());
- range.clear();
-}
-
-TEST(PageSet, FreeUnaligned)
-{
- // allocate 4 pages
- PageSet pages(2);
- PageSet::page_vector range;
- pages.alloc_range(0, 8, range);
- range.clear();
-
- // get the full range
- pages.get_range(0, 8, range);
- ASSERT_EQ(4u, range.size());
- range.clear();
-
- // free after offset 7 has no effect
- pages.free_pages_after(7);
- pages.get_range(0, 8, range);
- ASSERT_EQ(4u, range.size());
- range.clear();
-
- // free page 4
- pages.free_pages_after(5);
- pages.get_range(0, 8, range);
- ASSERT_EQ(3u, range.size());
- range.clear();
-
- // free pages 2 and 3
- pages.free_pages_after(1);
- pages.get_range(0, 8, range);
- ASSERT_EQ(1u, range.size());
- range.clear();
-}
-
-TEST(PageSet, FreeHoles)
-{
- // allocate pages at offsets 1, 2, 5, and 7
- PageSet pages(1);
- PageSet::page_vector range;
- for (uint64_t i : {1, 2, 5, 7})
- pages.alloc_range(i, 1, range);
- range.clear();
-
- // get the full range
- pages.get_range(0, 8, range);
- ASSERT_EQ(4u, range.size());
- range.clear();
-
- // free page 7
- pages.free_pages_after(6);
- pages.get_range(0, 8, range);
- ASSERT_EQ(3u, range.size());
- range.clear();
-
- // free page 5
- pages.free_pages_after(3);
- pages.get_range(0, 8, range);
- ASSERT_EQ(2u, range.size());
- range.clear();
-
- // free pages 1 and 2
- pages.free_pages_after(0);
- pages.get_range(0, 8, range);
- ASSERT_EQ(0u, range.size());
-}