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-rw-r--r--test/syscalls/linux/BUILD15
-rw-r--r--test/syscalls/linux/mlock.cc344
-rw-r--r--test/syscalls/linux/msync.cc20
3 files changed, 6 insertions, 373 deletions
diff --git a/test/syscalls/linux/BUILD b/test/syscalls/linux/BUILD
index f13e32daa..c0b8246b5 100644
--- a/test/syscalls/linux/BUILD
+++ b/test/syscalls/linux/BUILD
@@ -1020,21 +1020,6 @@ cc_binary(
)
cc_binary(
- name = "mlock_test",
- testonly = 1,
- srcs = ["mlock.cc"],
- linkstatic = 1,
- deps = [
- "//test/util:capability_util",
- "//test/util:cleanup",
- "//test/util:memory_util",
- "//test/util:multiprocess_util",
- "//test/util:test_util",
- "@com_google_googletest//:gtest",
- ],
-)
-
-cc_binary(
name = "mmap_test",
testonly = 1,
srcs = ["mmap.cc"],
diff --git a/test/syscalls/linux/mlock.cc b/test/syscalls/linux/mlock.cc
deleted file mode 100644
index a0d876c2e..000000000
--- a/test/syscalls/linux/mlock.cc
+++ /dev/null
@@ -1,344 +0,0 @@
-// Copyright 2018 Google LLC
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-// http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include <errno.h>
-#include <string.h>
-#include <sys/mman.h>
-#include <sys/resource.h>
-#include <sys/syscall.h>
-#include <unistd.h>
-
-#include "test/util/capability_util.h"
-#include "test/util/cleanup.h"
-#include "test/util/memory_util.h"
-#include "test/util/multiprocess_util.h"
-#include "test/util/test_util.h"
-
-using ::testing::_;
-
-namespace gvisor {
-namespace testing {
-
-namespace {
-
-PosixErrorOr<bool> CanMlock() {
- struct rlimit rlim;
- if (getrlimit(RLIMIT_MEMLOCK, &rlim) < 0) {
- return PosixError(errno, "getrlimit(RLIMIT_MEMLOCK)");
- }
- if (rlim.rlim_cur != 0) {
- return true;
- }
- return HaveCapability(CAP_IPC_LOCK);
-}
-
-// Returns true if the page containing addr is mlocked.
-bool IsPageMlocked(uintptr_t addr) {
- // This relies on msync(MS_INVALIDATE) interacting correctly with mlocked
- // pages, which is tested for by the MsyncInvalidate case below.
- int const rv = msync(reinterpret_cast<void*>(addr & ~(kPageSize - 1)),
- kPageSize, MS_ASYNC | MS_INVALIDATE);
- if (rv == 0) {
- return false;
- }
- // This uses TEST_PCHECK_MSG since it's used in subprocesses.
- TEST_PCHECK_MSG(errno == EBUSY, "msync failed with unexpected errno");
- return true;
-}
-
-PosixErrorOr<Cleanup> ScopedSetSoftRlimit(int resource, rlim_t newval) {
- struct rlimit old_rlim;
- if (getrlimit(resource, &old_rlim) != 0) {
- return PosixError(errno, "getrlimit failed");
- }
- struct rlimit new_rlim = old_rlim;
- new_rlim.rlim_cur = newval;
- if (setrlimit(resource, &new_rlim) != 0) {
- return PosixError(errno, "setrlimit failed");
- }
- return Cleanup([resource, old_rlim] {
- TEST_PCHECK(setrlimit(resource, &old_rlim) == 0);
- });
-}
-
-TEST(MlockTest, Basic) {
- SKIP_IF(!ASSERT_NO_ERRNO_AND_VALUE(CanMlock()));
- auto const mapping = ASSERT_NO_ERRNO_AND_VALUE(
- MmapAnon(kPageSize, PROT_READ | PROT_WRITE, MAP_PRIVATE));
- EXPECT_FALSE(IsPageMlocked(mapping.addr()));
- ASSERT_THAT(mlock(mapping.ptr(), mapping.len()), SyscallSucceeds());
- EXPECT_TRUE(IsPageMlocked(mapping.addr()));
-}
-
-TEST(MlockTest, ProtNone) {
- SKIP_IF(!ASSERT_NO_ERRNO_AND_VALUE(CanMlock()));
- auto const mapping =
- ASSERT_NO_ERRNO_AND_VALUE(MmapAnon(kPageSize, PROT_NONE, MAP_PRIVATE));
- EXPECT_FALSE(IsPageMlocked(mapping.addr()));
- ASSERT_THAT(mlock(mapping.ptr(), mapping.len()),
- SyscallFailsWithErrno(ENOMEM));
- // ENOMEM is returned because mlock can't populate the page, but it's still
- // considered locked.
- EXPECT_TRUE(IsPageMlocked(mapping.addr()));
-}
-
-TEST(MlockTest, MadviseDontneed) {
- SKIP_IF(!ASSERT_NO_ERRNO_AND_VALUE(CanMlock()));
- auto const mapping = ASSERT_NO_ERRNO_AND_VALUE(
- MmapAnon(kPageSize, PROT_READ | PROT_WRITE, MAP_PRIVATE));
- ASSERT_THAT(mlock(mapping.ptr(), mapping.len()), SyscallSucceeds());
- EXPECT_THAT(madvise(mapping.ptr(), mapping.len(), MADV_DONTNEED),
- SyscallFailsWithErrno(EINVAL));
-}
-
-TEST(MlockTest, MsyncInvalidate) {
- SKIP_IF(!ASSERT_NO_ERRNO_AND_VALUE(CanMlock()));
- auto const mapping = ASSERT_NO_ERRNO_AND_VALUE(
- MmapAnon(kPageSize, PROT_READ | PROT_WRITE, MAP_PRIVATE));
- ASSERT_THAT(mlock(mapping.ptr(), mapping.len()), SyscallSucceeds());
- EXPECT_THAT(msync(mapping.ptr(), mapping.len(), MS_ASYNC | MS_INVALIDATE),
- SyscallFailsWithErrno(EBUSY));
- EXPECT_THAT(msync(mapping.ptr(), mapping.len(), MS_SYNC | MS_INVALIDATE),
- SyscallFailsWithErrno(EBUSY));
-}
-
-TEST(MlockTest, Fork) {
- SKIP_IF(!ASSERT_NO_ERRNO_AND_VALUE(CanMlock()));
- auto const mapping = ASSERT_NO_ERRNO_AND_VALUE(
- MmapAnon(kPageSize, PROT_READ | PROT_WRITE, MAP_PRIVATE));
- EXPECT_FALSE(IsPageMlocked(mapping.addr()));
- ASSERT_THAT(mlock(mapping.ptr(), mapping.len()), SyscallSucceeds());
- EXPECT_TRUE(IsPageMlocked(mapping.addr()));
- EXPECT_THAT(
- InForkedProcess([&] { TEST_CHECK(!IsPageMlocked(mapping.addr())); }),
- IsPosixErrorOkAndHolds(0));
-}
-
-TEST(MlockTest, RlimitMemlockZero) {
- if (ASSERT_NO_ERRNO_AND_VALUE(HaveCapability(CAP_IPC_LOCK))) {
- ASSERT_NO_ERRNO(SetCapability(CAP_IPC_LOCK, false));
- }
- Cleanup reset_rlimit =
- ASSERT_NO_ERRNO_AND_VALUE(ScopedSetSoftRlimit(RLIMIT_MEMLOCK, 0));
- auto const mapping = ASSERT_NO_ERRNO_AND_VALUE(
- MmapAnon(kPageSize, PROT_READ | PROT_WRITE, MAP_PRIVATE));
- EXPECT_FALSE(IsPageMlocked(mapping.addr()));
- ASSERT_THAT(mlock(mapping.ptr(), mapping.len()),
- SyscallFailsWithErrno(EPERM));
-}
-
-TEST(MlockTest, RlimitMemlockInsufficient) {
- if (ASSERT_NO_ERRNO_AND_VALUE(HaveCapability(CAP_IPC_LOCK))) {
- ASSERT_NO_ERRNO(SetCapability(CAP_IPC_LOCK, false));
- }
- Cleanup reset_rlimit =
- ASSERT_NO_ERRNO_AND_VALUE(ScopedSetSoftRlimit(RLIMIT_MEMLOCK, kPageSize));
- auto const mapping = ASSERT_NO_ERRNO_AND_VALUE(
- MmapAnon(2 * kPageSize, PROT_READ | PROT_WRITE, MAP_PRIVATE));
- EXPECT_FALSE(IsPageMlocked(mapping.addr()));
- ASSERT_THAT(mlock(mapping.ptr(), mapping.len()),
- SyscallFailsWithErrno(ENOMEM));
-}
-
-TEST(MunlockTest, Basic) {
- SKIP_IF(!ASSERT_NO_ERRNO_AND_VALUE(CanMlock()));
- auto const mapping = ASSERT_NO_ERRNO_AND_VALUE(
- MmapAnon(kPageSize, PROT_READ | PROT_WRITE, MAP_PRIVATE));
- EXPECT_FALSE(IsPageMlocked(mapping.addr()));
- ASSERT_THAT(mlock(mapping.ptr(), mapping.len()), SyscallSucceeds());
- EXPECT_TRUE(IsPageMlocked(mapping.addr()));
- ASSERT_THAT(munlock(mapping.ptr(), mapping.len()), SyscallSucceeds());
- EXPECT_FALSE(IsPageMlocked(mapping.addr()));
-}
-
-TEST(MunlockTest, NotLocked) {
- SKIP_IF(!ASSERT_NO_ERRNO_AND_VALUE(CanMlock()));
- auto const mapping = ASSERT_NO_ERRNO_AND_VALUE(
- MmapAnon(kPageSize, PROT_READ | PROT_WRITE, MAP_PRIVATE));
- EXPECT_FALSE(IsPageMlocked(mapping.addr()));
- EXPECT_THAT(munlock(mapping.ptr(), mapping.len()), SyscallSucceeds());
- EXPECT_FALSE(IsPageMlocked(mapping.addr()));
-}
-
-// There is currently no test for mlockall(MCL_CURRENT) because the default
-// RLIMIT_MEMLOCK of 64 KB is insufficient to actually invoke
-// mlockall(MCL_CURRENT).
-
-TEST(MlockallTest, Future) {
- SKIP_IF(!ASSERT_NO_ERRNO_AND_VALUE(CanMlock()));
-
- // Run this test in a separate (single-threaded) subprocess to ensure that a
- // background thread doesn't try to mmap a large amount of memory, fail due
- // to hitting RLIMIT_MEMLOCK, and explode the process violently.
- EXPECT_THAT(InForkedProcess([] {
- auto const mapping =
- MmapAnon(kPageSize, PROT_READ | PROT_WRITE, MAP_PRIVATE)
- .ValueOrDie();
- TEST_CHECK(!IsPageMlocked(mapping.addr()));
- TEST_PCHECK(mlockall(MCL_FUTURE) == 0);
- // Ensure that mlockall(MCL_FUTURE) is turned off before the end
- // of the test, as otherwise mmaps may fail unexpectedly.
- Cleanup do_munlockall([] { TEST_PCHECK(munlockall() == 0); });
- auto const mapping2 = ASSERT_NO_ERRNO_AND_VALUE(
- MmapAnon(kPageSize, PROT_READ | PROT_WRITE, MAP_PRIVATE));
- TEST_CHECK(IsPageMlocked(mapping2.addr()));
- // Fire munlockall() and check that it disables
- // mlockall(MCL_FUTURE).
- do_munlockall.Release()();
- auto const mapping3 = ASSERT_NO_ERRNO_AND_VALUE(
- MmapAnon(kPageSize, PROT_READ | PROT_WRITE, MAP_PRIVATE));
- TEST_CHECK(!IsPageMlocked(mapping2.addr()));
- }),
- IsPosixErrorOkAndHolds(0));
-}
-
-TEST(MunlockallTest, Basic) {
- SKIP_IF(!ASSERT_NO_ERRNO_AND_VALUE(CanMlock()));
- auto const mapping = ASSERT_NO_ERRNO_AND_VALUE(
- MmapAnon(kPageSize, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_LOCKED));
- EXPECT_TRUE(IsPageMlocked(mapping.addr()));
- ASSERT_THAT(munlockall(), SyscallSucceeds());
- EXPECT_FALSE(IsPageMlocked(mapping.addr()));
-}
-
-#ifndef SYS_mlock2
-#ifdef __x86_64__
-#define SYS_mlock2 325
-#endif
-#endif
-
-#ifndef MLOCK_ONFAULT
-#define MLOCK_ONFAULT 0x01 // Linux: include/uapi/asm-generic/mman-common.h
-#endif
-
-#ifdef SYS_mlock2
-
-int mlock2(void const* addr, size_t len, int flags) {
- return syscall(SYS_mlock2, addr, len, flags);
-}
-
-TEST(Mlock2Test, NoFlags) {
- SKIP_IF(!ASSERT_NO_ERRNO_AND_VALUE(CanMlock()));
- auto const mapping = ASSERT_NO_ERRNO_AND_VALUE(
- MmapAnon(kPageSize, PROT_READ | PROT_WRITE, MAP_PRIVATE));
- EXPECT_FALSE(IsPageMlocked(mapping.addr()));
- ASSERT_THAT(mlock2(mapping.ptr(), mapping.len(), 0), SyscallSucceeds());
- EXPECT_TRUE(IsPageMlocked(mapping.addr()));
-}
-
-TEST(Mlock2Test, MlockOnfault) {
- SKIP_IF(!ASSERT_NO_ERRNO_AND_VALUE(CanMlock()));
- auto const mapping = ASSERT_NO_ERRNO_AND_VALUE(
- MmapAnon(kPageSize, PROT_READ | PROT_WRITE, MAP_PRIVATE));
- EXPECT_FALSE(IsPageMlocked(mapping.addr()));
- ASSERT_THAT(mlock2(mapping.ptr(), mapping.len(), MLOCK_ONFAULT),
- SyscallSucceeds());
- EXPECT_TRUE(IsPageMlocked(mapping.addr()));
-}
-
-TEST(Mlock2Test, UnknownFlags) {
- SKIP_IF(!ASSERT_NO_ERRNO_AND_VALUE(CanMlock()));
- auto const mapping = ASSERT_NO_ERRNO_AND_VALUE(
- MmapAnon(kPageSize, PROT_READ | PROT_WRITE, MAP_PRIVATE));
- EXPECT_THAT(mlock2(mapping.ptr(), mapping.len(), ~0),
- SyscallFailsWithErrno(EINVAL));
-}
-
-#endif // defined(SYS_mlock2)
-
-TEST(MapLockedTest, Basic) {
- SKIP_IF(!ASSERT_NO_ERRNO_AND_VALUE(CanMlock()));
- auto const mapping = ASSERT_NO_ERRNO_AND_VALUE(
- MmapAnon(kPageSize, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_LOCKED));
- EXPECT_TRUE(IsPageMlocked(mapping.addr()));
- EXPECT_THAT(munlock(mapping.ptr(), mapping.len()), SyscallSucceeds());
- EXPECT_FALSE(IsPageMlocked(mapping.addr()));
-}
-
-TEST(MapLockedTest, RlimitMemlockZero) {
- if (ASSERT_NO_ERRNO_AND_VALUE(HaveCapability(CAP_IPC_LOCK))) {
- ASSERT_NO_ERRNO(SetCapability(CAP_IPC_LOCK, false));
- }
- Cleanup reset_rlimit =
- ASSERT_NO_ERRNO_AND_VALUE(ScopedSetSoftRlimit(RLIMIT_MEMLOCK, 0));
- EXPECT_THAT(
- MmapAnon(kPageSize, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_LOCKED),
- PosixErrorIs(EPERM, _));
-}
-
-TEST(MapLockedTest, RlimitMemlockInsufficient) {
- if (ASSERT_NO_ERRNO_AND_VALUE(HaveCapability(CAP_IPC_LOCK))) {
- ASSERT_NO_ERRNO(SetCapability(CAP_IPC_LOCK, false));
- }
- Cleanup reset_rlimit =
- ASSERT_NO_ERRNO_AND_VALUE(ScopedSetSoftRlimit(RLIMIT_MEMLOCK, kPageSize));
- EXPECT_THAT(
- MmapAnon(2 * kPageSize, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_LOCKED),
- PosixErrorIs(EAGAIN, _));
-}
-
-TEST(MremapLockedTest, Basic) {
- SKIP_IF(!ASSERT_NO_ERRNO_AND_VALUE(CanMlock()));
- auto mapping = ASSERT_NO_ERRNO_AND_VALUE(
- MmapAnon(kPageSize, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_LOCKED));
- EXPECT_TRUE(IsPageMlocked(mapping.addr()));
-
- void* addr = mremap(mapping.ptr(), mapping.len(), 2 * mapping.len(),
- MREMAP_MAYMOVE, nullptr);
- if (addr == MAP_FAILED) {
- FAIL() << "mremap failed: " << errno << " (" << strerror(errno) << ")";
- }
- mapping.release();
- mapping.reset(addr, 2 * mapping.len());
- EXPECT_TRUE(IsPageMlocked(reinterpret_cast<uintptr_t>(addr)));
-}
-
-TEST(MremapLockedTest, RlimitMemlockZero) {
- SKIP_IF(!ASSERT_NO_ERRNO_AND_VALUE(CanMlock()));
- auto mapping = ASSERT_NO_ERRNO_AND_VALUE(
- MmapAnon(kPageSize, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_LOCKED));
- EXPECT_TRUE(IsPageMlocked(mapping.addr()));
-
- if (ASSERT_NO_ERRNO_AND_VALUE(HaveCapability(CAP_IPC_LOCK))) {
- ASSERT_NO_ERRNO(SetCapability(CAP_IPC_LOCK, false));
- }
- Cleanup reset_rlimit =
- ASSERT_NO_ERRNO_AND_VALUE(ScopedSetSoftRlimit(RLIMIT_MEMLOCK, 0));
- void* addr = mremap(mapping.ptr(), mapping.len(), 2 * mapping.len(),
- MREMAP_MAYMOVE, nullptr);
- EXPECT_TRUE(addr == MAP_FAILED && errno == EAGAIN)
- << "addr = " << addr << ", errno = " << errno;
-}
-
-TEST(MremapLockedTest, RlimitMemlockInsufficient) {
- SKIP_IF(!ASSERT_NO_ERRNO_AND_VALUE(CanMlock()));
- auto mapping = ASSERT_NO_ERRNO_AND_VALUE(
- MmapAnon(kPageSize, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_LOCKED));
- EXPECT_TRUE(IsPageMlocked(mapping.addr()));
-
- if (ASSERT_NO_ERRNO_AND_VALUE(HaveCapability(CAP_IPC_LOCK))) {
- ASSERT_NO_ERRNO(SetCapability(CAP_IPC_LOCK, false));
- }
- Cleanup reset_rlimit = ASSERT_NO_ERRNO_AND_VALUE(
- ScopedSetSoftRlimit(RLIMIT_MEMLOCK, mapping.len()));
- void* addr = mremap(mapping.ptr(), mapping.len(), 2 * mapping.len(),
- MREMAP_MAYMOVE, nullptr);
- EXPECT_TRUE(addr == MAP_FAILED && errno == EAGAIN)
- << "addr = " << addr << ", errno = " << errno;
-}
-
-} // namespace
-
-} // namespace testing
-} // namespace gvisor
diff --git a/test/syscalls/linux/msync.cc b/test/syscalls/linux/msync.cc
index 72d90dc78..0ddc621aa 100644
--- a/test/syscalls/linux/msync.cc
+++ b/test/syscalls/linux/msync.cc
@@ -43,13 +43,14 @@ class MsyncParameterizedTest : public ::testing::TestWithParam<MsyncTestParam> {
protected:
int msync_flags() const { return std::get<0>(GetParam()); }
- PosixErrorOr<Mapping> GetMapping() const { return std::get<1>(GetParam())(); }
+ PosixErrorOr<Mapping> GetMapping() const {
+ auto rv = std::get<1>(GetParam())();
+ return rv;
+ }
};
-// All valid msync(2) flag combinations, not including MS_INVALIDATE. ("Linux
-// permits a call to msync() that specifies neither [MS_SYNC or MS_ASYNC], with
-// semantics that are (currently) equivalent to specifying MS_ASYNC." -
-// msync(2))
+// All valid msync(2) flag combinations (not including MS_INVALIDATE, which
+// gVisor doesn't implement).
constexpr std::initializer_list<int> kMsyncFlags = {MS_SYNC, MS_ASYNC, 0};
// Returns functions that return mappings that should be successfully
@@ -133,15 +134,6 @@ TEST_P(MsyncFullParamTest, UnalignedAddressFails) {
SyscallFailsWithErrno(EINVAL));
}
-TEST_P(MsyncFullParamTest, InvalidateUnlockedSucceeds) {
- auto m = ASSERT_NO_ERRNO_AND_VALUE(GetMapping());
- EXPECT_THAT(msync(m.ptr(), m.len(), msync_flags() | MS_INVALIDATE),
- SyscallSucceeds());
-}
-
-// The test for MS_INVALIDATE on mlocked pages is in mlock.cc since it requires
-// probing for mlock support.
-
INSTANTIATE_TEST_CASE_P(
All, MsyncFullParamTest,
::testing::Combine(::testing::ValuesIn(kMsyncFlags),
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-02 07:46:11 +0000