1 /*
2 * Copyright (C) 2023 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 "gmock/gmock.h"
18 #include "gtest/gtest.h"
19
20 #include <string_view>
21
22 #include "berberis/runtime_primitives/code_pool.h"
23
24 namespace berberis {
25
26 class MockExecRegionFactory {
27 public:
SetImpl(MockExecRegionFactory * impl)28 static void SetImpl(MockExecRegionFactory* impl) { impl_ = impl; }
29
30 static const uint32_t kExecRegionSize;
31
32 // Gmock is not able to mock static methods so we call *Impl counterpart
33 // and mock it instead.
Create(size_t size)34 static ExecRegion Create(size_t size) { return impl_->CreateImpl(size); }
35
36 MOCK_METHOD(ExecRegion, CreateImpl, (size_t));
37
38 private:
39 static MockExecRegionFactory* impl_;
40 };
41
42 const uint32_t MockExecRegionFactory::kExecRegionSize = sysconf(_SC_PAGESIZE);
43 MockExecRegionFactory* MockExecRegionFactory::impl_ = nullptr;
44
45 namespace {
46
AllocWritableRegion()47 uint8_t* AllocWritableRegion() {
48 return reinterpret_cast<uint8_t*>(MmapImplOrDie({
49 .size = MockExecRegionFactory::kExecRegionSize,
50 .prot = PROT_READ | PROT_WRITE,
51 .flags = MAP_PRIVATE | MAP_ANONYMOUS,
52 }));
53 }
54
AllocExecutableRegion()55 uint8_t* AllocExecutableRegion() {
56 return reinterpret_cast<uint8_t*>(MmapImplOrDie({
57 .size = MockExecRegionFactory::kExecRegionSize,
58 .prot = PROT_NONE,
59 .flags = MAP_PRIVATE | MAP_ANONYMOUS,
60 .berberis_flags = kMmapBerberis32Bit,
61 }));
62 }
63
TEST(CodePool,Smoke)64 TEST(CodePool, Smoke) {
65 MockExecRegionFactory exec_region_factory_mock;
66 MockExecRegionFactory::SetImpl(&exec_region_factory_mock);
67 auto* first_exec_region_memory_write = AllocWritableRegion();
68 auto* first_exec_region_memory_exec = AllocExecutableRegion();
69 auto* second_exec_region_memory_write = AllocWritableRegion();
70 auto* second_exec_region_memory_exec = AllocExecutableRegion();
71
72 EXPECT_CALL(exec_region_factory_mock, CreateImpl(MockExecRegionFactory::kExecRegionSize))
73 .WillOnce([&](size_t) {
74 return ExecRegion{first_exec_region_memory_exec,
75 first_exec_region_memory_write,
76 MockExecRegionFactory::kExecRegionSize};
77 })
78 .WillOnce([&](size_t) {
79 return ExecRegion{second_exec_region_memory_exec,
80 second_exec_region_memory_write,
81 MockExecRegionFactory::kExecRegionSize};
82 });
83
84 CodePool<MockExecRegionFactory> code_pool;
85 {
86 MachineCode machine_code;
87 constexpr std::string_view kCode = "test1";
88 machine_code.AddSequence(kCode.data(), kCode.size());
89 auto host_code = code_pool.Add(&machine_code);
90 ASSERT_EQ(host_code, AsHostCodeAddr(first_exec_region_memory_exec));
91 EXPECT_EQ(std::string_view{reinterpret_cast<const char*>(first_exec_region_memory_write)},
92 kCode);
93 }
94
95 code_pool.ResetExecRegion();
96
97 {
98 MachineCode machine_code;
99 constexpr std::string_view kCode = "test2";
100 machine_code.AddSequence(kCode.data(), kCode.size());
101 auto host_code = code_pool.Add(&machine_code);
102 ASSERT_EQ(host_code, AsHostCodeAddr(second_exec_region_memory_exec));
103 EXPECT_EQ(std::string_view{reinterpret_cast<const char*>(second_exec_region_memory_write)},
104 kCode);
105 }
106 }
107
TEST(DataPool,Smoke)108 TEST(DataPool, Smoke) {
109 DataPool data_pool;
110 static uint32_t kConst1 = 0x12345678;
111 static uint32_t kConst2 = 0x87654321;
112 uint32_t kVar = kConst2;
113 uint32_t* ptr = data_pool.Add(kVar);
114 EXPECT_EQ(kConst2, *ptr);
115 *ptr = kConst1;
116 EXPECT_EQ(kConst1, *ptr);
117 }
118
119 } // namespace
120
121 } // namespace berberis
122