test/tests/buffer_test.cpp
| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | // | ||
| 2 | // SPDX-FileCopyrightText: Copyright 2025 Arm Limited and/or its affiliates <open-source-office@arm.com> | ||
| 3 | // | ||
| 4 | // SPDX-License-Identifier: Apache-2.0 | ||
| 5 | // | ||
| 6 | |||
| 7 | #include "test/common/buffer.hpp" | ||
| 8 | |||
| 9 | #include <gtest/gtest.h> | ||
| 10 | #include <sys/mman.h> | ||
| 11 | #include <sys/signal.h> | ||
| 12 | |||
| 13 | #include <csignal> | ||
| 14 | #include <cstddef> | ||
| 15 | #include <cstdint> | ||
| 16 | #include <cstdlib> | ||
| 17 | #include <limits> | ||
| 18 | #include <random> | ||
| 19 | #include <string> | ||
| 20 | |||
| 21 | #include "test/common/seed.hpp" | ||
| 22 | |||
| 23 | namespace kai::test { | ||
| 24 | |||
| 25 | namespace { | ||
| 26 | constexpr size_t g_num_runs = 100; | ||
| 27 | } // namespace | ||
| 28 | |||
| 29 |
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12 | TEST(BufferTest, NonePolicy) { |
| 30 |
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2 | std::mt19937 rng(seed_stream(current_test_key())()); |
| 31 | 2 | std::uniform_int_distribution<size_t> dist(1, std::numeric_limits<uint16_t>::max()); | |
| 32 | |||
| 33 | // Store the current buffer policy | ||
| 34 | 2 | std::string buffer_policy; | |
| 35 |
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2 | if (const char* buffer_policy_env = getenv(Buffer::buffer_policy_env_name)) { |
| 36 | ✗ | buffer_policy = std::string(buffer_policy_env); | |
| 37 | ✗ | } | |
| 38 | |||
| 39 | // Overwrite the buffer policy for purpose of the test | ||
| 40 |
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2 | ASSERT_EQ(setenv(Buffer::buffer_policy_env_name, "NONE", 1 /* overwrite */), 0); |
| 41 | |||
| 42 |
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202 | for (size_t i = 0; i < g_num_runs; ++i) { |
| 43 |
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200 | const size_t buffer_size = dist(rng); |
| 44 | |||
| 45 |
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200 | const auto buffer = Buffer(buffer_size); |
| 46 | |||
| 47 |
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200 | const auto* data = reinterpret_cast<uint8_t*>(buffer.data()); |
| 48 |
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200 | ASSERT_NE(data, nullptr); |
| 49 | 200 | } | |
| 50 | |||
| 51 |
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2 | if (buffer_policy.empty()) { |
| 52 | // Remove variable if not present before | ||
| 53 |
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2 | ASSERT_EQ(unsetenv(Buffer::buffer_policy_env_name), 0); |
| 54 | 2 | } else { | |
| 55 | // Restore the buffer policy to its original value | ||
| 56 | ✗ | ASSERT_EQ(setenv(Buffer::buffer_policy_env_name, buffer_policy.c_str(), 1 /* overwrite */), 0); | |
| 57 | } | ||
| 58 | 2 | } | |
| 59 | |||
| 60 |
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12 | TEST(BufferDeathTest, InvalidPolicy) { |
| 61 |
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2 | std::mt19937 rng(seed_stream(current_test_key())()); |
| 62 | 2 | std::uniform_int_distribution<size_t> dist(1, std::numeric_limits<uint16_t>::max()); | |
| 63 | |||
| 64 | // Store the current buffer policy | ||
| 65 | 2 | std::string buffer_policy; | |
| 66 |
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2 | if (const char* buffer_policy_env = getenv(Buffer::buffer_policy_env_name)) { |
| 67 | ✗ | buffer_policy = std::string(buffer_policy_env); | |
| 68 | ✗ | } | |
| 69 | |||
| 70 | // Overwrite the buffer policy for purpose of the test | ||
| 71 |
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2 | ASSERT_EQ(setenv(Buffer::buffer_policy_env_name, "INVALID_POLICY_TEST", 1 /* overwrite */), 0); |
| 72 | |||
| 73 |
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202 | for (size_t i = 0; i < g_num_runs; ++i) { |
| 74 |
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200 | const size_t buffer_size = dist(rng); |
| 75 | |||
| 76 | // Ignore missing default case in switch statement in test dependency macro | ||
| 77 | #pragma GCC diagnostic push | ||
| 78 | #pragma GCC diagnostic ignored "-Wswitch-default" | ||
| 79 |
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200 | EXPECT_DEATH({ [[maybe_unused]] const auto buffer = Buffer(buffer_size); }, ""); |
| 80 | #pragma GCC diagnostic pop | ||
| 81 | 200 | } | |
| 82 | |||
| 83 |
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2 | if (buffer_policy.empty()) { |
| 84 | // Remove variable if not present before | ||
| 85 |
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2 | ASSERT_EQ(unsetenv(Buffer::buffer_policy_env_name), 0); |
| 86 | 2 | } else { | |
| 87 | // Restore the buffer policy to its original value | ||
| 88 | ✗ | ASSERT_EQ(setenv(Buffer::buffer_policy_env_name, buffer_policy.c_str(), 1 /* overwrite */), 0); | |
| 89 | } | ||
| 90 | 2 | } | |
| 91 | |||
| 92 | #if defined(__linux__) || defined(__APPLE__) | ||
| 93 |
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12 | TEST(BufferDeathTest, ProtectUnderflowPolicy) { |
| 94 |
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2 | std::mt19937 rng(seed_stream(current_test_key())()); |
| 95 | 2 | std::uniform_int_distribution<size_t> dist(1, std::numeric_limits<uint16_t>::max()); | |
| 96 | |||
| 97 | // Store the current buffer policy | ||
| 98 | 2 | std::string buffer_policy; | |
| 99 |
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2 | if (const char* buffer_policy_env = getenv(Buffer::buffer_policy_env_name)) { |
| 100 | ✗ | buffer_policy = std::string(buffer_policy_env); | |
| 101 | ✗ | } | |
| 102 | |||
| 103 | // Overwrite the buffer policy for purpose of the test | ||
| 104 |
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2 | ASSERT_EQ(setenv(Buffer::buffer_policy_env_name, "PROTECT_UNDERFLOW", 1 /* overwrite */), 0); |
| 105 | |||
| 106 |
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202 | for (size_t i = 0; i < g_num_runs; ++i) { |
| 107 |
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200 | const size_t buffer_size = dist(rng); |
| 108 | |||
| 109 |
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200 | const auto buffer = Buffer(buffer_size); |
| 110 | |||
| 111 |
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200 | const auto* data = reinterpret_cast<uint8_t*>(buffer.data()); |
| 112 |
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200 | ASSERT_NE(data, nullptr); |
| 113 |
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200 | ASSERT_NE(data, MAP_FAILED); |
| 114 | |||
| 115 | // Ignore missing default case in switch statement in test dependency macro | ||
| 116 | #pragma GCC diagnostic push | ||
| 117 | #pragma GCC diagnostic ignored "-Wswitch-default" | ||
| 118 |
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400 | EXPECT_EXIT( |
| 119 | // Underflow by one byte | ||
| 120 | { [[maybe_unused]] const volatile auto val = *--data; }, | ||
| 121 | [](const size_t exit_status) { | ||
| 122 | return testing::KilledBySignal(SIGBUS)(exit_status) || // | ||
| 123 | testing::KilledBySignal(SIGSEGV)(exit_status) || // | ||
| 124 | testing::KilledBySignal(SIGABRT)(exit_status); // | ||
| 125 | }, | ||
| 126 | ""); | ||
| 127 | #pragma GCC diagnostic pop | ||
| 128 | 200 | } | |
| 129 | |||
| 130 |
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2 | if (buffer_policy.empty()) { |
| 131 | // Remove variable if not present before | ||
| 132 |
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2 | ASSERT_EQ(unsetenv(Buffer::buffer_policy_env_name), 0); |
| 133 | 2 | } else { | |
| 134 | // Restore the buffer policy to its original value | ||
| 135 | ✗ | ASSERT_EQ(setenv(Buffer::buffer_policy_env_name, buffer_policy.c_str(), 1 /* overwrite */), 0); | |
| 136 | } | ||
| 137 | 2 | } | |
| 138 | |||
| 139 |
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12 | TEST(BufferDeathTest, ProtectOverflowPolicy) { |
| 140 |
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2 | std::mt19937 rng(seed_stream(current_test_key())()); |
| 141 | 2 | std::uniform_int_distribution<size_t> dist(1, std::numeric_limits<uint16_t>::max()); | |
| 142 | |||
| 143 | // Store the current buffer policy | ||
| 144 | 2 | std::string buffer_policy; | |
| 145 |
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2 | if (const char* buffer_policy_env = getenv(Buffer::buffer_policy_env_name)) { |
| 146 | ✗ | buffer_policy = std::string(buffer_policy_env); | |
| 147 | ✗ | } | |
| 148 | |||
| 149 | // Overwrite the buffer policy for purpose of the test | ||
| 150 |
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2 | ASSERT_EQ(setenv(Buffer::buffer_policy_env_name, "PROTECT_OVERFLOW", 1 /* overwrite */), 0); |
| 151 | |||
| 152 |
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202 | for (size_t i = 0; i < g_num_runs; ++i) { |
| 153 |
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200 | const size_t buffer_size = dist(rng); |
| 154 | |||
| 155 |
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200 | const auto buffer = Buffer(buffer_size); |
| 156 | |||
| 157 |
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200 | const auto* data = reinterpret_cast<uint8_t*>(buffer.data()); |
| 158 |
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200 | ASSERT_NE(data, nullptr); |
| 159 |
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200 | ASSERT_NE(data, MAP_FAILED); |
| 160 | |||
| 161 | // Ignore missing default case in switch statement in test dependency macro | ||
| 162 | #pragma GCC diagnostic push | ||
| 163 | #pragma GCC diagnostic ignored "-Wswitch-default" | ||
| 164 |
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400 | EXPECT_EXIT( |
| 165 | // Overflow by one byte | ||
| 166 | { [[maybe_unused]] const volatile auto val = *(data + buffer_size); }, | ||
| 167 | [](const size_t exit_status) { | ||
| 168 | return testing::KilledBySignal(SIGBUS)(exit_status) || // | ||
| 169 | testing::KilledBySignal(SIGSEGV)(exit_status) || // | ||
| 170 | testing::KilledBySignal(SIGABRT)(exit_status); // | ||
| 171 | }, | ||
| 172 | ""); | ||
| 173 | #pragma GCC diagnostic pop | ||
| 174 | 200 | } | |
| 175 | |||
| 176 |
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2 | if (buffer_policy.empty()) { |
| 177 | // Remove variable if not present before | ||
| 178 |
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2 | ASSERT_EQ(unsetenv(Buffer::buffer_policy_env_name), 0); |
| 179 | 2 | } else { | |
| 180 | // Restore the buffer policy to its original value | ||
| 181 | ✗ | ASSERT_EQ(setenv(Buffer::buffer_policy_env_name, buffer_policy.c_str(), 1 /* overwrite */), 0); | |
| 182 | } | ||
| 183 | 2 | } | |
| 184 | #endif // if defined(__linux__) || defined(__APPLE__) | ||
| 185 | |||
| 186 | } // namespace kai::test | ||
| 187 |