1//===-- sanitizer_hash_test.cpp -------------------------------------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8//
9// This file is a part of Sanitizers.
10//
11//===----------------------------------------------------------------------===//
12#include "sanitizer_common/sanitizer_hash.h"
13
14#include "gtest/gtest.h"
15
16namespace __sanitizer {
17
18// Tests matche a few hashes generated by https://github.com/aappleby/smhasher.
19
20TEST(SanitizerCommon, Hash32Seed) {
21 EXPECT_EQ(MurMur2HashBuilder(0).get(), 275646681u);
22 EXPECT_EQ(MurMur2HashBuilder(1).get(), 3030210376u);
23 EXPECT_EQ(MurMur2HashBuilder(3).get(), 1816185114u);
24}
25
26TEST(SanitizerCommon, Hash32Add) {
27 MurMur2HashBuilder h(123 * sizeof(u32));
28 for (u32 i = 0; i < 123; ++i) h.add(k: i);
29 EXPECT_EQ(h.get(), 351963665u);
30 for (u32 i = 0; i < 123; ++i) h.add(k: -i);
31 EXPECT_EQ(h.get(), 2640061027u);
32}
33
34TEST(SanitizerCommon, Hash64Seed) {
35 EXPECT_EQ(MurMur2Hash64Builder(0).get(), 4469829599815726255ull);
36 EXPECT_EQ(MurMur2Hash64Builder(1).get(), 14121968454562043709ull);
37 EXPECT_EQ(MurMur2Hash64Builder(3).get(), 8040757559320203998ull);
38}
39
40TEST(SanitizerCommon, Hash64Add) {
41 MurMur2Hash64Builder h(123 * sizeof(u64));
42 for (u32 i = 0; i < 123; ++i) h.add(k: i);
43 EXPECT_EQ(h.get(), 11366430808886012537ull);
44 for (u32 i = 0; i < 123; ++i) h.add(k: -i);
45 EXPECT_EQ(h.get(), 10843188204560467446ull);
46}
47
48} // namespace __sanitizer
49

source code of compiler-rt/lib/sanitizer_common/tests/sanitizer_hash_test.cpp