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IN NO EVENT SHALL THE COPYRIGHT 22// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 23// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 24// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 28// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 30// memory_mapped_file_unittest.cc: 31// Unit tests for google_breakpad::MemoryMappedFile. 32 33#include <fcntl.h> 34#include <string.h> 35#include <unistd.h> 36 37#include <string> 38 39#include "breakpad_googletest_includes.h" 40#include "common/linux/memory_mapped_file.h" 41#include "common/tests/auto_tempdir.h" 42#include "common/tests/file_utils.h" 43#include "common/using_std_string.h" 44 45using google_breakpad::AutoTempDir; 46using google_breakpad::MemoryMappedFile; 47using google_breakpad::WriteFile; 48 49namespace { 50 51class MemoryMappedFileTest : public testing::Test { 52 protected: 53 void ExpectNoMappedData(const MemoryMappedFile& mapped_file) { 54 EXPECT_TRUE(mapped_file.content().IsEmpty()); 55 EXPECT_TRUE(mapped_file.data() == NULL); 56 EXPECT_EQ(0U, mapped_file.size()); 57 } 58}; 59 60} // namespace 61 62TEST_F(MemoryMappedFileTest, DefaultConstructor) { 63 MemoryMappedFile mapped_file; 64 ExpectNoMappedData(mapped_file); 65} 66 67TEST_F(MemoryMappedFileTest, UnmapWithoutMap) { 68 MemoryMappedFile mapped_file; 69 mapped_file.Unmap(); 70} 71 72TEST_F(MemoryMappedFileTest, MapNonexistentFile) { 73 { 74 MemoryMappedFile mapped_file("nonexistent-file", 0); 75 ExpectNoMappedData(mapped_file); 76 } 77 { 78 MemoryMappedFile mapped_file; 79 EXPECT_FALSE(mapped_file.Map("nonexistent-file", 0)); 80 ExpectNoMappedData(mapped_file); 81 } 82} 83 84TEST_F(MemoryMappedFileTest, MapEmptyFile) { 85 AutoTempDir temp_dir; 86 string test_file = temp_dir.path() + "/empty_file"; 87 ASSERT_TRUE(WriteFile(test_file.c_str(), NULL, 0)); 88 89 { 90 MemoryMappedFile mapped_file(test_file.c_str(), 0); 91 ExpectNoMappedData(mapped_file); 92 } 93 { 94 MemoryMappedFile mapped_file; 95 EXPECT_TRUE(mapped_file.Map(test_file.c_str(), 0)); 96 ExpectNoMappedData(mapped_file); 97 } 98} 99 100TEST_F(MemoryMappedFileTest, MapNonEmptyFile) { 101 char data[256]; 102 size_t data_size = sizeof(data); 103 for (size_t i = 0; i < data_size; ++i) { 104 data[i] = i; 105 } 106 107 AutoTempDir temp_dir; 108 string test_file = temp_dir.path() + "/test_file"; 109 ASSERT_TRUE(WriteFile(test_file.c_str(), data, data_size)); 110 111 { 112 MemoryMappedFile mapped_file(test_file.c_str(), 0); 113 EXPECT_FALSE(mapped_file.content().IsEmpty()); 114 EXPECT_TRUE(mapped_file.data() != NULL); 115 EXPECT_EQ(data_size, mapped_file.size()); 116 EXPECT_EQ(0, memcmp(data, mapped_file.data(), data_size)); 117 } 118 { 119 MemoryMappedFile mapped_file; 120 EXPECT_TRUE(mapped_file.Map(test_file.c_str(), 0)); 121 EXPECT_FALSE(mapped_file.content().IsEmpty()); 122 EXPECT_TRUE(mapped_file.data() != NULL); 123 EXPECT_EQ(data_size, mapped_file.size()); 124 EXPECT_EQ(0, memcmp(data, mapped_file.data(), data_size)); 125 } 126} 127 128TEST_F(MemoryMappedFileTest, RemapAfterMap) { 129 char data1[256]; 130 size_t data1_size = sizeof(data1); 131 for (size_t i = 0; i < data1_size; ++i) { 132 data1[i] = i; 133 } 134 135 char data2[50]; 136 size_t data2_size = sizeof(data2); 137 for (size_t i = 0; i < data2_size; ++i) { 138 data2[i] = 255 - i; 139 } 140 141 AutoTempDir temp_dir; 142 string test_file1 = temp_dir.path() + "/test_file1"; 143 string test_file2 = temp_dir.path() + "/test_file2"; 144 ASSERT_TRUE(WriteFile(test_file1.c_str(), data1, data1_size)); 145 ASSERT_TRUE(WriteFile(test_file2.c_str(), data2, data2_size)); 146 147 { 148 MemoryMappedFile mapped_file(test_file1.c_str(), 0); 149 EXPECT_FALSE(mapped_file.content().IsEmpty()); 150 EXPECT_TRUE(mapped_file.data() != NULL); 151 EXPECT_EQ(data1_size, mapped_file.size()); 152 EXPECT_EQ(0, memcmp(data1, mapped_file.data(), data1_size)); 153 154 mapped_file.Map(test_file2.c_str(), 0); 155 EXPECT_FALSE(mapped_file.content().IsEmpty()); 156 EXPECT_TRUE(mapped_file.data() != NULL); 157 EXPECT_EQ(data2_size, mapped_file.size()); 158 EXPECT_EQ(0, memcmp(data2, mapped_file.data(), data2_size)); 159 } 160 { 161 MemoryMappedFile mapped_file; 162 EXPECT_TRUE(mapped_file.Map(test_file1.c_str(), 0)); 163 EXPECT_FALSE(mapped_file.content().IsEmpty()); 164 EXPECT_TRUE(mapped_file.data() != NULL); 165 EXPECT_EQ(data1_size, mapped_file.size()); 166 EXPECT_EQ(0, memcmp(data1, mapped_file.data(), data1_size)); 167 168 mapped_file.Map(test_file2.c_str(), 0); 169 EXPECT_FALSE(mapped_file.content().IsEmpty()); 170 EXPECT_TRUE(mapped_file.data() != NULL); 171 EXPECT_EQ(data2_size, mapped_file.size()); 172 EXPECT_EQ(0, memcmp(data2, mapped_file.data(), data2_size)); 173 } 174} 175 176TEST_F(MemoryMappedFileTest, MapWithOffset) { 177 // Put more data in the test file this time. Offsets can only be 178 // done on page boundaries, so we need a two page file to test this. 179 const int page_size = 4096; 180 char data1[2 * page_size]; 181 size_t data1_size = sizeof(data1); 182 for (size_t i = 0; i < data1_size; ++i) { 183 data1[i] = i & 0x7f; 184 } 185 186 AutoTempDir temp_dir; 187 string test_file1 = temp_dir.path() + "/test_file1"; 188 ASSERT_TRUE(WriteFile(test_file1.c_str(), data1, data1_size)); 189 { 190 MemoryMappedFile mapped_file(test_file1.c_str(), page_size); 191 EXPECT_FALSE(mapped_file.content().IsEmpty()); 192 EXPECT_TRUE(mapped_file.data() != NULL); 193 EXPECT_EQ(data1_size - page_size, mapped_file.size()); 194 EXPECT_EQ( 195 0, 196 memcmp(data1 + page_size, mapped_file.data(), data1_size - page_size)); 197 } 198 { 199 MemoryMappedFile mapped_file; 200 mapped_file.Map(test_file1.c_str(), page_size); 201 EXPECT_FALSE(mapped_file.content().IsEmpty()); 202 EXPECT_TRUE(mapped_file.data() != NULL); 203 EXPECT_EQ(data1_size - page_size, mapped_file.size()); 204 EXPECT_EQ( 205 0, 206 memcmp(data1 + page_size, mapped_file.data(), data1_size - page_size)); 207 } 208} 209