diff options
| -rw-r--r-- | test/syscalls/linux/mmap.cc | 61 |
1 files changed, 57 insertions, 4 deletions
diff --git a/test/syscalls/linux/mmap.cc b/test/syscalls/linux/mmap.cc index 93a6d9cde..caad575cf 100644 --- a/test/syscalls/linux/mmap.cc +++ b/test/syscalls/linux/mmap.cc @@ -793,6 +793,19 @@ class MMapFileTest : public MMapTest { ASSERT_THAT(unlink(filename_.c_str()), SyscallSucceeds()); } + bool FSSupportsMap() const { + bool supported = true; + void* ret = mmap(nullptr, 1, PROT_NONE, 0, fd_.get(), 0); + if (ret == MAP_FAILED && errno != ENODEV) { + supported = false; + } + if (ret != MAP_FAILED) { + munmap(ret, 1); + } + + return supported; + } + ssize_t Read(char* buf, size_t count) { ssize_t len = 0; do { @@ -840,12 +853,14 @@ class MMapFileParamTest // MAP_POPULATE allowed. // There isn't a good way to verify it actually did anything. TEST_P(MMapFileParamTest, MapPopulate) { + SKIP_IF(!FSSupportsMap()); ASSERT_THAT(Map(0, kPageSize, prot(), flags() | MAP_POPULATE, fd_.get(), 0), SyscallSucceeds()); } // MAP_POPULATE on a short file. TEST_P(MMapFileParamTest, MapPopulateShort) { + SKIP_IF(!FSSupportsMap()); ASSERT_THAT( Map(0, 2 * kPageSize, prot(), flags() | MAP_POPULATE, fd_.get(), 0), SyscallSucceeds()); @@ -853,6 +868,7 @@ TEST_P(MMapFileParamTest, MapPopulateShort) { // Read contents from mapped file. TEST_F(MMapFileTest, Read) { + SKIP_IF(!FSSupportsMap()); size_t len = strlen(kFileContents); ASSERT_EQ(len, Write(kFileContents, len)); @@ -866,6 +882,7 @@ TEST_F(MMapFileTest, Read) { // Map at an offset. TEST_F(MMapFileTest, MapOffset) { + SKIP_IF(!FSSupportsMap()); ASSERT_THAT(lseek(fd_.get(), kPageSize, SEEK_SET), SyscallSucceeds()); size_t len = strlen(kFileContents); @@ -881,6 +898,7 @@ TEST_F(MMapFileTest, MapOffset) { } TEST_F(MMapFileTest, MapOffsetBeyondEnd) { + SKIP_IF(!FSSupportsMap()); SetupGvisorDeathTest(); uintptr_t addr; @@ -897,6 +915,7 @@ TEST_F(MMapFileTest, MapOffsetBeyondEnd) { // Verify mmap fails when sum of length and offset overflows. TEST_F(MMapFileTest, MapLengthPlusOffsetOverflows) { + SKIP_IF(!FSSupportsMap()); const size_t length = static_cast<size_t>(-kPageSize); const off_t offset = kPageSize; ASSERT_THAT(Map(0, length, PROT_READ, MAP_PRIVATE, fd_.get(), offset), @@ -905,6 +924,7 @@ TEST_F(MMapFileTest, MapLengthPlusOffsetOverflows) { // MAP_PRIVATE PROT_WRITE is allowed on read-only FDs. TEST_F(MMapFileTest, WritePrivateOnReadOnlyFd) { + SKIP_IF(!FSSupportsMap()); const FileDescriptor fd = ASSERT_NO_ERRNO_AND_VALUE(Open(filename_, O_RDONLY)); @@ -921,6 +941,7 @@ TEST_F(MMapFileTest, WritePrivateOnReadOnlyFd) { // MAP_SHARED PROT_WRITE not allowed on read-only FDs. TEST_F(MMapFileTest, WriteSharedOnReadOnlyFd) { + SKIP_IF(!FSSupportsMap()); const FileDescriptor fd = ASSERT_NO_ERRNO_AND_VALUE(Open(filename_, O_RDONLY)); @@ -932,6 +953,7 @@ TEST_F(MMapFileTest, WriteSharedOnReadOnlyFd) { // Mmap not allowed on O_PATH FDs. TEST_F(MMapFileTest, MmapFileWithOpath) { + SKIP_IF(!FSSupportsMap()); SKIP_IF(IsRunningWithVFS1()); const TempPath file = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFile()); const FileDescriptor fd = @@ -944,6 +966,7 @@ TEST_F(MMapFileTest, MmapFileWithOpath) { // The FD must be readable. TEST_P(MMapFileParamTest, WriteOnlyFd) { + SKIP_IF(!FSSupportsMap()); const FileDescriptor fd = ASSERT_NO_ERRNO_AND_VALUE(Open(filename_, O_WRONLY)); @@ -955,6 +978,7 @@ TEST_P(MMapFileParamTest, WriteOnlyFd) { // Overwriting the contents of a file mapped MAP_SHARED PROT_READ // should cause the new data to be reflected in the mapping. TEST_F(MMapFileTest, ReadSharedConsistentWithOverwrite) { + SKIP_IF(!FSSupportsMap()); // Start from scratch. EXPECT_THAT(ftruncate(fd_.get(), 0), SyscallSucceeds()); @@ -994,6 +1018,7 @@ TEST_F(MMapFileTest, ReadSharedConsistentWithOverwrite) { // Partially overwriting a file mapped MAP_SHARED PROT_READ should be reflected // in the mapping. TEST_F(MMapFileTest, ReadSharedConsistentWithPartialOverwrite) { + SKIP_IF(!FSSupportsMap()); // Start from scratch. EXPECT_THAT(ftruncate(fd_.get(), 0), SyscallSucceeds()); @@ -1034,6 +1059,7 @@ TEST_F(MMapFileTest, ReadSharedConsistentWithPartialOverwrite) { // Overwriting a file mapped MAP_SHARED PROT_READ should be reflected in the // mapping and the file. TEST_F(MMapFileTest, ReadSharedConsistentWithWriteAndFile) { + SKIP_IF(!FSSupportsMap()); // Start from scratch. EXPECT_THAT(ftruncate(fd_.get(), 0), SyscallSucceeds()); @@ -1077,6 +1103,7 @@ TEST_F(MMapFileTest, ReadSharedConsistentWithWriteAndFile) { // Write data to mapped file. TEST_F(MMapFileTest, WriteShared) { + SKIP_IF(!FSSupportsMap()); uintptr_t addr; ASSERT_THAT(addr = Map(0, kPageSize, PROT_READ | PROT_WRITE, MAP_SHARED, fd_.get(), 0), @@ -1101,6 +1128,7 @@ TEST_F(MMapFileTest, WriteShared) { // Write data to portion of mapped page beyond the end of the file. // These writes are not reflected in the file. TEST_F(MMapFileTest, WriteSharedBeyondEnd) { + SKIP_IF(!FSSupportsMap()); // The file is only half of a page. We map an entire page. Writes to the // end of the mapping must not be reflected in the file. uintptr_t addr; @@ -1137,6 +1165,7 @@ TEST_F(MMapFileTest, WriteSharedBeyondEnd) { // The portion of a mapped page that becomes part of the file after a truncate // is reflected in the file. TEST_F(MMapFileTest, WriteSharedTruncateUp) { + SKIP_IF(!FSSupportsMap()); // The file is only half of a page. We map an entire page. Writes to the // end of the mapping must not be reflected in the file. uintptr_t addr; @@ -1174,6 +1203,7 @@ TEST_F(MMapFileTest, WriteSharedTruncateUp) { } TEST_F(MMapFileTest, ReadSharedTruncateDownThenUp) { + SKIP_IF(!FSSupportsMap()); // Start from scratch. EXPECT_THAT(ftruncate(fd_.get(), 0), SyscallSucceeds()); @@ -1213,6 +1243,7 @@ TEST_F(MMapFileTest, ReadSharedTruncateDownThenUp) { } TEST_F(MMapFileTest, WriteSharedTruncateDownThenUp) { + SKIP_IF(!FSSupportsMap()); // The file is only half of a page. We map an entire page. Writes to the // end of the mapping must not be reflected in the file. uintptr_t addr; @@ -1247,6 +1278,7 @@ TEST_F(MMapFileTest, WriteSharedTruncateDownThenUp) { } TEST_F(MMapFileTest, ReadSharedTruncateSIGBUS) { + SKIP_IF(!FSSupportsMap()); SetupGvisorDeathTest(); // Start from scratch. @@ -1277,6 +1309,7 @@ TEST_F(MMapFileTest, ReadSharedTruncateSIGBUS) { } TEST_F(MMapFileTest, WriteSharedTruncateSIGBUS) { + SKIP_IF(!FSSupportsMap()); SetupGvisorDeathTest(); uintptr_t addr; @@ -1298,6 +1331,7 @@ TEST_F(MMapFileTest, WriteSharedTruncateSIGBUS) { } TEST_F(MMapFileTest, ReadSharedTruncatePartialPage) { + SKIP_IF(!FSSupportsMap()); // Start from scratch. EXPECT_THAT(ftruncate(fd_.get(), 0), SyscallSucceeds()); @@ -1327,6 +1361,7 @@ TEST_F(MMapFileTest, ReadSharedTruncatePartialPage) { // Page can still be accessed and contents are intact after truncating a partial // page. TEST_F(MMapFileTest, WriteSharedTruncatePartialPage) { + SKIP_IF(!FSSupportsMap()); // Expand the file to a full page. EXPECT_THAT(ftruncate(fd_.get(), kPageSize), SyscallSucceeds()); @@ -1354,6 +1389,7 @@ TEST_F(MMapFileTest, WriteSharedTruncatePartialPage) { // MAP_PRIVATE writes are not carried through to the underlying file. TEST_F(MMapFileTest, WritePrivate) { + SKIP_IF(!FSSupportsMap()); uintptr_t addr; ASSERT_THAT(addr = Map(0, kPageSize, PROT_READ | PROT_WRITE, MAP_PRIVATE, fd_.get(), 0), @@ -1378,6 +1414,7 @@ TEST_F(MMapFileTest, WritePrivate) { // SIGBUS raised when reading or writing past end of a mapped file. TEST_P(MMapFileParamTest, SigBusDeath) { + SKIP_IF(!FSSupportsMap()); SetupGvisorDeathTest(); uintptr_t addr; @@ -1406,6 +1443,7 @@ TEST_P(MMapFileParamTest, SigBusDeath) { // // See b/27877699. TEST_P(MMapFileParamTest, NoSigBusOnPagesBeforeEOF) { + SKIP_IF(!FSSupportsMap()); uintptr_t addr; ASSERT_THAT(addr = Map(0, 2 * kPageSize, prot(), flags(), fd_.get(), 0), SyscallSucceeds()); @@ -1424,6 +1462,7 @@ TEST_P(MMapFileParamTest, NoSigBusOnPagesBeforeEOF) { // Tests that SIGBUS is not raised when reading or writing from a file-mapped // page containing EOF, *after* the EOF. TEST_P(MMapFileParamTest, NoSigBusOnPageContainingEOF) { + SKIP_IF(!FSSupportsMap()); uintptr_t addr; ASSERT_THAT(addr = Map(0, 2 * kPageSize, prot(), flags(), fd_.get(), 0), SyscallSucceeds()); @@ -1446,6 +1485,7 @@ TEST_P(MMapFileParamTest, NoSigBusOnPageContainingEOF) { // page cache (which does not yet support writing to shared mappings), a bug // caused reads to fail unnecessarily on such mappings. See b/28913513. TEST_F(MMapFileTest, ReadingWritableSharedFilePageSucceeds) { + SKIP_IF(!FSSupportsMap()); uintptr_t addr; size_t len = strlen(kFileContents); @@ -1463,6 +1503,7 @@ TEST_F(MMapFileTest, ReadingWritableSharedFilePageSucceeds) { // read past end of file (resulting in a fault in sentry context in the gVisor // case). See b/28913513. TEST_F(MMapFileTest, InternalSigBus) { + SKIP_IF(!FSSupportsMap()); uintptr_t addr; ASSERT_THAT(addr = Map(0, 2 * kPageSize, PROT_READ | PROT_WRITE, MAP_PRIVATE, fd_.get(), 0), @@ -1483,6 +1524,7 @@ TEST_F(MMapFileTest, InternalSigBus) { // /dev/zero to a shared mapping (so that the SIGBUS isn't caught during // copy-on-write breaking). TEST_F(MMapFileTest, InternalSigBusZeroing) { + SKIP_IF(!FSSupportsMap()); uintptr_t addr; ASSERT_THAT(addr = Map(0, 2 * kPageSize, PROT_READ | PROT_WRITE, MAP_SHARED, fd_.get(), 0), @@ -1578,6 +1620,7 @@ TEST_F(MMapTest, NoReserve) { // Map more than the gVisor page-cache map unit (64k) and ensure that // it is consistent with reading from the file. TEST_F(MMapFileTest, Bug38498194) { + SKIP_IF(!FSSupportsMap()); // Choose a sufficiently large map unit. constexpr int kSize = 4 * 1024 * 1024; EXPECT_THAT(ftruncate(fd_.get(), kSize), SyscallSucceeds()); @@ -1606,6 +1649,7 @@ TEST_F(MMapFileTest, Bug38498194) { // Tests that reading from a file to a memory mapping of the same file does not // deadlock. See b/34813270. TEST_F(MMapFileTest, SelfRead) { + SKIP_IF(!FSSupportsMap()); uintptr_t addr; ASSERT_THAT(addr = Map(0, kPageSize, PROT_READ | PROT_WRITE, MAP_SHARED, fd_.get(), 0), @@ -1618,6 +1662,7 @@ TEST_F(MMapFileTest, SelfRead) { // Tests that writing to a file from a memory mapping of the same file does not // deadlock. Regression test for b/34813270. TEST_F(MMapFileTest, SelfWrite) { + SKIP_IF(!FSSupportsMap()); uintptr_t addr; ASSERT_THAT(addr = Map(0, kPageSize, PROT_READ, MAP_SHARED, fd_.get(), 0), SyscallSucceeds()); @@ -1633,8 +1678,12 @@ TEST(MMapDeathTest, TruncateAfterCOWBreak) { auto const temp_file = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFile()); auto const fd = ASSERT_NO_ERRNO_AND_VALUE(Open(temp_file.path(), O_RDWR)); ASSERT_THAT(ftruncate(fd.get(), kPageSize), SyscallSucceeds()); - auto const mapping = ASSERT_NO_ERRNO_AND_VALUE(Mmap( - nullptr, kPageSize, PROT_READ | PROT_WRITE, MAP_PRIVATE, fd.get(), 0)); + + auto maybe_mapping = Mmap(nullptr, kPageSize, PROT_READ | PROT_WRITE, + MAP_PRIVATE, fd.get(), 0); + // Does FS support mmap? + SKIP_IF(maybe_mapping.error().errno_value() == ENODEV); + auto const mapping = ASSERT_NO_ERRNO_AND_VALUE(std::move(maybe_mapping)); // Write to this mapping, causing the page to be copied for write. memset(mapping.ptr(), 'a', mapping.len()); @@ -1661,8 +1710,12 @@ TEST(MMapNoFixtureTest, MapReadOnlyAfterCreateWriteOnly) { auto const wo_fd = ASSERT_NO_ERRNO_AND_VALUE(Open(filename, O_WRONLY)); ASSERT_THAT(ftruncate(wo_fd.get(), kPageSize), SyscallSucceeds()); - auto const mapping = ASSERT_NO_ERRNO_AND_VALUE( - Mmap(nullptr, kPageSize, PROT_READ, MAP_SHARED, ro_fd.get(), 0)); + auto maybe_mapping = + Mmap(nullptr, kPageSize, PROT_READ, MAP_SHARED, ro_fd.get(), 0); + // Does FS support mmap? + SKIP_IF(maybe_mapping.error().errno_value() == ENODEV); + auto const mapping = ASSERT_NO_ERRNO_AND_VALUE(std::move(maybe_mapping)); + std::vector<char> buf(kPageSize); // The test passes if this survives. std::copy(static_cast<char*>(mapping.ptr()), |