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//===-- alignment.cpp -------------------------------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "gwp_asan/tests/harness.h"
#include "gwp_asan/utilities.h"
TEST(AlignmentTest, PowerOfTwo) {
std::vector<std::pair<size_t, size_t>> AskedSizeToAlignedSize = {
{1, 1}, {2, 2}, {3, 4}, {4, 4}, {5, 8}, {7, 8},
{8, 8}, {9, 16}, {15, 16}, {16, 16}, {17, 32}, {31, 32},
{32, 32}, {33, 48}, {4095, 4096}, {4096, 4096},
};
for (const auto &KV : AskedSizeToAlignedSize) {
EXPECT_EQ(KV.second,
gwp_asan::rightAlignedAllocationSize(
KV.first, gwp_asan::AlignmentStrategy::POWER_OF_TWO));
}
}
TEST(AlignmentTest, AlignBionic) {
std::vector<std::pair<size_t, size_t>> AskedSizeToAlignedSize = {
{1, 8}, {2, 8}, {3, 8}, {4, 8}, {5, 8}, {7, 8},
{8, 8}, {9, 16}, {15, 16}, {16, 16}, {17, 24}, {31, 32},
{32, 32}, {33, 40}, {4095, 4096}, {4096, 4096},
};
for (const auto &KV : AskedSizeToAlignedSize) {
EXPECT_EQ(KV.second, gwp_asan::rightAlignedAllocationSize(
KV.first, gwp_asan::AlignmentStrategy::BIONIC));
}
}
TEST(AlignmentTest, PerfectAlignment) {
for (size_t i = 1; i <= 4096; ++i) {
EXPECT_EQ(i, gwp_asan::rightAlignedAllocationSize(
i, gwp_asan::AlignmentStrategy::PERFECT));
}
}
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