5f2a74c87a
Summary: Android has different alignment requirements. You can read more about them here (https://cs.android.com/android/platform/superproject/+/master:bionic/tests/malloc_test.cpp;l=808), but the general gist is that for malloc(x <= 8), we do malloc(8), and for everything else, we do 16-byte alignment. Reviewers: eugenis, morehouse, cferris Reviewed By: eugenis, morehouse Subscribers: #sanitizers, llvm-commits, pcc Tags: #sanitizers, #llvm Differential Revision: https://reviews.llvm.org/D74364
45 lines
1.6 KiB
C++
45 lines
1.6 KiB
C++
//===-- alignment.cpp -------------------------------------------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "gwp_asan/tests/harness.h"
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#include "gwp_asan/utilities.h"
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TEST(AlignmentTest, PowerOfTwo) {
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std::vector<std::pair<size_t, size_t>> AskedSizeToAlignedSize = {
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{1, 1}, {2, 2}, {3, 4}, {4, 4}, {5, 8}, {7, 8},
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{8, 8}, {9, 16}, {15, 16}, {16, 16}, {17, 32}, {31, 32},
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{32, 32}, {33, 48}, {4095, 4096}, {4096, 4096},
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};
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for (const auto &KV : AskedSizeToAlignedSize) {
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EXPECT_EQ(KV.second,
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gwp_asan::rightAlignedAllocationSize(
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KV.first, gwp_asan::AlignmentStrategy::POWER_OF_TWO));
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}
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}
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TEST(AlignmentTest, AlignBionic) {
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std::vector<std::pair<size_t, size_t>> AskedSizeToAlignedSize = {
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{1, 8}, {2, 8}, {3, 8}, {4, 8}, {5, 8}, {7, 8},
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{8, 8}, {9, 16}, {15, 16}, {16, 16}, {17, 24}, {31, 32},
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{32, 32}, {33, 40}, {4095, 4096}, {4096, 4096},
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};
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for (const auto &KV : AskedSizeToAlignedSize) {
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EXPECT_EQ(KV.second, gwp_asan::rightAlignedAllocationSize(
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KV.first, gwp_asan::AlignmentStrategy::BIONIC));
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}
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}
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TEST(AlignmentTest, PerfectAlignment) {
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for (size_t i = 1; i <= 4096; ++i) {
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EXPECT_EQ(i, gwp_asan::rightAlignedAllocationSize(
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i, gwp_asan::AlignmentStrategy::PERFECT));
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}
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}
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