On Thu, May 2, 2024 at 4:24 AM Ryan Roberts ryan.roberts@arm.com wrote:
On 15/04/2024 17:35, jeffxu@chromium.org wrote:
From: Jeff Xu jeffxu@chromium.org
selftest for memory sealing change in mmap() and mseal().
Signed-off-by: Jeff Xu jeffxu@chromium.org
tools/testing/selftests/mm/.gitignore | 1 + tools/testing/selftests/mm/Makefile | 1 + tools/testing/selftests/mm/mseal_test.c | 1836 +++++++++++++++++++++++ 3 files changed, 1838 insertions(+) create mode 100644 tools/testing/selftests/mm/mseal_test.c
diff --git a/tools/testing/selftests/mm/.gitignore b/tools/testing/selftests/mm/.gitignore index d26e962f2ac4..98eaa4590f11 100644 --- a/tools/testing/selftests/mm/.gitignore +++ b/tools/testing/selftests/mm/.gitignore @@ -47,3 +47,4 @@ mkdirty va_high_addr_switch hugetlb_fault_after_madv hugetlb_madv_vs_map +mseal_test diff --git a/tools/testing/selftests/mm/Makefile b/tools/testing/selftests/mm/Makefile index eb5f39a2668b..95d10fe1b3c1 100644 --- a/tools/testing/selftests/mm/Makefile +++ b/tools/testing/selftests/mm/Makefile @@ -59,6 +59,7 @@ TEST_GEN_FILES += mlock2-tests TEST_GEN_FILES += mrelease_test TEST_GEN_FILES += mremap_dontunmap TEST_GEN_FILES += mremap_test +TEST_GEN_FILES += mseal_test TEST_GEN_FILES += on-fault-limit TEST_GEN_FILES += pagemap_ioctl TEST_GEN_FILES += thuge-gen diff --git a/tools/testing/selftests/mm/mseal_test.c b/tools/testing/selftests/mm/mseal_test.c new file mode 100644 index 000000000000..06c780d1d8e5 --- /dev/null +++ b/tools/testing/selftests/mm/mseal_test.c @@ -0,0 +1,1836 @@ +// SPDX-License-Identifier: GPL-2.0 +#define _GNU_SOURCE +#include <sys/mman.h>
I'm afraid this is causing a build error on our CI, and as a result we are not running any mm selftests currently.
The error is here:
CC mseal_test mseal_test.c: In function ‘test_seal_mremap_move_dontunmap’: mseal_test.c:1469:50: error: ‘MREMAP_DONTUNMAP’ undeclared (first use in this function) 1469 | ret2 = mremap(ptr, size, size, MREMAP_MAYMOVE | MREMAP_DONTUNMAP, 0); | ^~~~~~~~~~~~~~~~ mseal_test.c:1469:50: note: each undeclared identifier is reported only once for each function it appears in mseal_test.c: In function ‘test_seal_mremap_move_dontunmap_anyaddr’: mseal_test.c:1501:50: error: ‘MREMAP_DONTUNMAP’ undeclared (first use in this function) 1501 | ret2 = mremap(ptr, size, size, MREMAP_MAYMOVE | MREMAP_DONTUNMAP, | ^~~~~~~~~~~~~~~~
And I think the reason is due to our CI's toolchain's sys/mman.h not including linux/mman.h where MREMAP_DONTUNMAP is defined.
I think the fix is to explicitly #include <linux/mman.h>, as a number of other mm selftests do.
When I tried to build with aarch64-linux-gnu-gcc, this passed.
aarch64-linux-gnu-gcc -I ../../../../usr/include -DDEBUG -O3 -DDEBUG -O3 mseal_test.c -o mseal_test -lm -Wall
I don't have the exact environment to repro the issue and verify the fix. I will send a patch with the linux/mman.h.
I will probably need some help to verify the fix on arm build, Ryan, could you help with this ?
Thanks -Jeff