1 /*
2 * Copyright (C) 2020 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #include <sys/mman.h>
18 #include <sys/types.h>
19
20 #include <gtest/gtest.h>
21
22 #ifdef __ANDROID__
23 #include <bionic/mte.h>
24 #endif
25
26 #include "ForkTest.h"
27 #include "MemoryLocal.h"
28 #include "MemoryRemote.h"
29 #include "PidUtils.h"
30 #include "TestUtils.h"
31
32 namespace unwindstack {
33
34 using MemoryMteTest = ForkTest;
35
CreateTagMapping()36 static uintptr_t CreateTagMapping() {
37 #if defined(__aarch64__)
38 uintptr_t mapping =
39 reinterpret_cast<uintptr_t>(mmap(nullptr, getpagesize(), PROT_READ | PROT_WRITE | PROT_MTE,
40 MAP_PRIVATE | MAP_ANONYMOUS, -1, 0));
41 if (reinterpret_cast<void*>(mapping) == MAP_FAILED) {
42 return 0;
43 }
44 __asm__ __volatile__(".arch_extension mte; stg %0, [%0]"
45 :
46 : "r"(mapping + (1ULL << 56))
47 : "memory");
48 return mapping;
49 #else
50 return 0;
51 #endif
52 }
53
TEST_F(MemoryMteTest,remote_read_tag)54 TEST_F(MemoryMteTest, remote_read_tag) {
55 #if !defined(__aarch64__)
56 GTEST_SKIP() << "Requires aarch64";
57 #else
58 if (!mte_supported()) {
59 GTEST_SKIP() << "Requires MTE";
60 }
61 #endif
62
63 uintptr_t mapping = CreateTagMapping();
64 ASSERT_NE(0U, mapping);
65
66 ASSERT_NO_FATAL_FAILURE(Fork());
67
68 MemoryRemote remote(pid_);
69
70 EXPECT_EQ(1, remote.ReadTag(mapping));
71 EXPECT_EQ(0, remote.ReadTag(mapping + 16));
72 }
73
TEST_F(MemoryMteTest,local_read_tag)74 TEST_F(MemoryMteTest, local_read_tag) {
75 #if !defined(__aarch64__)
76 GTEST_SKIP() << "Requires aarch64";
77 #else
78 if (!mte_supported()) {
79 GTEST_SKIP() << "Requires MTE";
80 }
81 #endif
82
83 uintptr_t mapping = CreateTagMapping();
84 ASSERT_NE(0U, mapping);
85
86 MemoryLocal local;
87
88 EXPECT_EQ(1, local.ReadTag(mapping));
89 EXPECT_EQ(0, local.ReadTag(mapping + 16));
90 }
91
92 } // namespace unwindstack
93