Test fail with unexpected signal number on ppc64le, aarch64

[musicinmybrain]

After fixing and/or working around everything in #7, I find that I see a failure like

▶ 5/5 - ../tests/process-api-tests.c:process:wait_signal: Assertion 'status & 0x000000FF == signum' failed: status & 0x000000FF == 5, signum == 4 FAIL          
5/5 unit api tests FAIL            11.33s   419/420 subtests passed

when I build and test mmlib 1.4.2 on Fedora Linux.

This didn’t always fail; I’m not sure what triggered the regression. However, it seems strange to be hard-coding implementation details in the API of a portability library. I’m not sure that the current approach operates at the right level of abstraction. I’m not sure, at a glance, what to propose instead, but I’m happy, upon request, to provide additional information or to test patches.

[nbourdau]

According to your log, during the test, the parent process received signal 5, aka SIGTRAP, instead of expected signal 4, aka SIGILL. SIGTRAP is normally related to debugging activity. Is it possible that you have enable breakpoints in child process executable (or something related) during your attempt to fix/workaround #7? If so, it could be easily explained by the debugging operations interfering with the tests.

I am wondering whether you can still reproduce it. After building the project, if running several time CK_RUN_CASE=process tests/testapi 2> /dev/null never report error, it would be fair to consider the failures were unintended side-effects of the debugging session...

[musicinmybrain]

Hmm. This was reported based on a non-interactive build, so there was no debugger involved. We’re no longer maintaining an mmlib package in Fedora, but I can reproduce this in a git checkout on an aarch64 system (Apple M2 laptop running Fedora Asahi Remix).

$ git clone https://github.com/mmlabs-mindmaze/mmlib.git
$ cd mmlib
$ meson build
$ meson compile -C build -j8 --verbose
$ meson test -C build -j8 --print-errorlogs
[…]
▶ 5/5 - ../tests/process-api-tests.c:process:wait_signal: Assertion 'status & 0x000000FF == signum' failed: status & 0x000000FF == 5, signum == 4 FAIL          
5/5 unit api tests        FAIL            12.89s   421/422 subtests passed
>>> MSAN_OPTIONS=halt_on_error=1:abort_on_error=1:print_summary=1:print_stacktrace=1 MALLOC_PERTURB_=108 UBSAN_OPTIONS=halt_on_error=1:abort_on_error=1:print_summary=1:print_stacktrace=1 CK_VERBOSITY=silent MESON_TEST_ITERATION=1 ASAN_OPTIONS=halt_on_error=1:abort_on_error=1:print_summary=1 LD_LIBRARY_PATH=/home/ben/src/forks/mmlib/build/src /home/ben/src/forks/mmlib/build/tests/testapi
――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――― ✀  ―――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――
Listing only the last 100 lines from a long log.
02/09/25 10:06:02 ERROR mmlib            : write(8, ...) failed ; Bad file descriptor (mm_write() in ../src/file-posix.c:258)
failed write for fd=8
02/09/25 10:06:02 ERROR mmlib            : Cannot run "/" ; Permission denied (load_new_proc_img() in ../src/process-posix.c:242)
02/09/25 10:06:02 ERROR mmlib            : Cannot run "./process-data/file-noexec" ; Permission denied (load_new_proc_img() in ../src/process-posix.c:242)
02/09/25 10:06:02 ERROR mmlib            : Cannot run "./process-data/file-unkfmt" ; Exec format error (load_new_proc_img() in ../src/process-posix.c:242)
02/09/25 10:06:02 ERROR mmlib            : Cannot run "./process-data/does-not-exists" ; No such file or directory (load_new_proc_img() in ../src/process-posix.c:242)
02/09/25 10:06:02 ERROR mmlib            : Cannot run "/home/ben/src/forks/mmlib/build/tests/process-data/file-noexec" ; Permission denied (load_new_proc_img() in ../src/process-posix.c:242)
02/09/25 10:06:02 ERROR mmlib            : Cannot run "/home/ben/src/forks/mmlib/build/tests/process-data/file-unkfmt" ; Exec format error (load_new_proc_img() in ../src/process-posix.c:242)
02/09/25 10:06:02 ERROR mmlib            : Cannot run "/home/ben/src/forks/mmlib/build/tests/process-data/does-not-exists" ; No such file or directory (load_new_proc_img() in ../src/process-posix.c:242)
02/09/25 10:06:02 ERROR mmlib            : Cannot run "file-noexec" ; Permission denied (load_new_proc_img() in ../src/process-posix.c:242)
02/09/25 10:06:02 ERROR mmlib            : Cannot run "does-not-exists" ; No such file or directory (load_new_proc_img() in ../src/process-posix.c:242)
02/09/25 10:06:02 ERROR mmlib            : Cannot run "/" ; Permission denied (load_new_proc_img() in ../src/process-posix.c:242)
02/09/25 10:06:02 ERROR mmlib            : Cannot run "/home/ben/src/forks/mmlib/build/tests/process-data/file-noexec" ; Permission denied (load_new_proc_img() in ../src/process-posix.c:242)
02/09/25 10:06:02 ERROR mmlib            : Cannot run "/home/ben/src/forks/mmlib/build/tests/process-data/file-unkfmt" ; Exec format error (load_new_proc_img() in ../src/process-posix.c:242)
02/09/25 10:06:02 ERROR mmlib            :  ; No such file or directory (spawn_daemon() in ../src/process-posix.c:404)
02/09/25 10:06:02 ERROR mmlib            : Cannot run "/home/ben/src/forks/mmlib/build/tests/process-data/file-noexec" ; Permission denied (load_new_proc_img() in ../src/process-posix.c:242)
02/09/25 10:06:02 ERROR mmlib            : Cannot run "/home/ben/src/forks/mmlib/build/tests/process-data/file-unkfmt" ; Exec format error (load_new_proc_img() in ../src/process-posix.c:242)
02/09/25 10:06:02 ERROR mmlib            :  ; No such file or directory (spawn_daemon() in ../src/process-posix.c:404)
02/09/25 10:06:02 ERROR mmlib            : Cannot run "file-noexec" ; Permission denied (load_new_proc_img() in ../src/process-posix.c:242)
02/09/25 10:06:02 ERROR mmlib            : Cannot run "does-not-exists" ; No such file or directory (load_new_proc_img() in ../src/process-posix.c:242)
02/09/25 10:06:02 ERROR mmlib            : file must not be NULL (mm_spawn() in ../src/process-posix.c:527)
02/09/25 10:06:02 ERROR mmlib            : file must not be NULL (mm_spawn() in ../src/process-posix.c:527)
02/09/25 10:06:02 ERROR mmlib            : file must not be NULL (mm_spawn() in ../src/process-posix.c:527)
02/09/25 10:06:02 ERROR mmlib            : file must not be NULL (mm_spawn() in ../src/process-posix.c:527)
02/09/25 10:06:02 ERROR mmlib            : Invalid flags (00000008) (mm_spawn() in ../src/process-posix.c:530)
map_fd = [ 3:7 4:8 5:9 ]
/home/ben/src/forks/mmlib/build/tests/child-proc
check-open-files
3
num_fd = 3
02/09/25 10:06:02 ERROR mmlib            : write(7, ...) failed ; Bad file descriptor (mm_write() in ../src/file-posix.c:258)
failed write for fd=7
02/09/25 10:06:02 ERROR mmlib            : write(8, ...) failed ; Bad file descriptor (mm_write() in ../src/file-posix.c:258)
failed write for fd=8
02/09/25 10:06:02 ERROR mmlib            : waitpid(724471) failed ; No child processes (mm_wait_process() in ../src/process-posix.c:642)
map_fd = [ 3:7 4:8 5:9 ]
02/09/25 10:06:02 ERROR mmlib            : unable to fork ; Resource temporarily unavailable (spawn_child() in ../src/process-posix.c:326)
spawn_child() failed: unable to fork ; Resource temporarily unavailablemap_fd = [ 3:7 4:8 5:9 ]
02/09/25 10:06:02 ERROR mmlib            : unable to do first fork ; Resource temporarily unavailable (spawn_daemon() in ../src/process-posix.c:378)
spawn_child() failed: unable to do first fork ; Resource temporarily unavailable02/09/25 10:06:02 ERROR mmlib            : unable to get /home/ben/src/forks/mmlib/build/tests/completion_testdir filetype ; No such file or directory (mm_remove() in ../src/file-posix.c:904)
02/09/25 10:06:02 ERROR mmlib            : open(/home/ben/src/forks/mmlib/build/tests/completion_testdir/emptydir/, 00080041) failed ; Is a directory (mm_open() in ../src/file-posix.c:99)
Unsupported option -k
Use -h or --help to display usage.
Option -i|--set-i needs value.
Use -h or --help to display usage.
Option -i|--set-i needs value.
Use -h or --help to display usage.
Unsupported option ---set-ll
Use -h or --help to display usage.
Unsupported option --unknown-opt
Use -h or --help to display usage.
Unsupported option --unknown-opt
Use -h or --help to display usage.
Unsupported option --unknown-opt
Use -h or --help to display usage.
Option -i|--set-i accepting int value type has received an invalid value "not_a_number" (Invalid argument)
Use -h or --help to display usage.
Option -i|--set-i accepting int value type has received an invalid value "21_noise" (Invalid argument)
Use -h or --help to display usage.
Option -i|--set-i accepting int value type has received an invalid value "2147483648" (Numerical result out of range)
Use -h or --help to display usage.
Option -i|--set-i accepting int value type has received an invalid value "-2147483649" (Numerical result out of range)
Use -h or --help to display usage.
Option --set-ui accepting unsigned int value type has received an invalid value "4294967296" (Numerical result out of range)
Use -h or --help to display usage.
Option --set-ui accepting unsigned int value type has received an invalid value "-1" (Numerical result out of range)
Use -h or --help to display usage.
Option --set-ll accepting long long value type has received an invalid value "9223372036854775808" (Numerical result out of range)
Use -h or --help to display usage.
Option --set-ll accepting long long value type has received an invalid value "-9223372036854775809" (Numerical result out of range)
Use -h or --help to display usage.
Option --set-ull accepting unsigned long long value type has received an invalid value "18446744073709551616" (Numerical result out of range)
Use -h or --help to display usage.
Option --set-ull accepting unsigned long long value type has received an invalid value "-1" (Numerical result out of range)
Use -h or --help to display usage.
02/09/25 10:06:02 ERROR mmlib            : Unknown dir type (-5) (mm_get_basedir() in ../src/utils.c:289)
02/09/25 10:06:02 ERROR mmlib            : Unknown dir type (-4) (mm_get_basedir() in ../src/utils.c:289)
02/09/25 10:06:02 ERROR mmlib            : Unknown dir type (-3) (mm_get_basedir() in ../src/utils.c:289)
02/09/25 10:06:02 ERROR mmlib            : Unknown dir type (-2) (mm_get_basedir() in ../src/utils.c:289)
02/09/25 10:06:02 ERROR mmlib            : Unknown dir type (-1) (mm_get_basedir() in ../src/utils.c:289)
02/09/25 10:06:02 ERROR mmlib            : Unknown dir type (5) (mm_get_basedir() in ../src/utils.c:289)
02/09/25 10:06:02 ERROR mmlib            : Unknown dir type (6) (mm_get_basedir() in ../src/utils.c:289)
02/09/25 10:06:02 ERROR mmlib            : Unknown dir type (7) (mm_get_basedir() in ../src/utils.c:289)
02/09/25 10:06:02 ERROR mmlib            : Unknown dir type (8) (mm_get_basedir() in ../src/utils.c:289)
02/09/25 10:06:02 ERROR mmlib            : Unknown dir type (9) (mm_get_basedir() in ../src/utils.c:289)
02/09/25 10:06:02 ERROR mmlib            : Unknown dir type (-5) (mm_get_basedir() in ../src/utils.c:289)
02/09/25 10:06:02 ERROR mmlib            : Unknown dir type (-4) (mm_get_basedir() in ../src/utils.c:289)
02/09/25 10:06:02 ERROR mmlib            : Unknown dir type (-3) (mm_get_basedir() in ../src/utils.c:289)
02/09/25 10:06:02 ERROR mmlib            : Unknown dir type (-2) (mm_get_basedir() in ../src/utils.c:289)
02/09/25 10:06:02 ERROR mmlib            : Unknown dir type (-1) (mm_get_basedir() in ../src/utils.c:289)
02/09/25 10:06:02 ERROR mmlib            : suffix cannot be null (mm_path_from_basedir() in ../src/utils.c:316)
02/09/25 10:06:02 ERROR mmlib            : suffix cannot be null (mm_path_from_basedir() in ../src/utils.c:316)
02/09/25 10:06:02 ERROR mmlib            : suffix cannot be null (mm_path_from_basedir() in ../src/utils.c:316)
02/09/25 10:06:02 ERROR mmlib            : suffix cannot be null (mm_path_from_basedir() in ../src/utils.c:316)
02/09/25 10:06:02 ERROR mmlib            : suffix cannot be null (mm_path_from_basedir() in ../src/utils.c:316)
02/09/25 10:06:02 ERROR mmlib            : Unknown dir type (5) (mm_get_basedir() in ../src/utils.c:289)
02/09/25 10:06:02 ERROR mmlib            : Unknown dir type (6) (mm_get_basedir() in ../src/utils.c:289)
02/09/25 10:06:02 ERROR mmlib            : Unknown dir type (7) (mm_get_basedir() in ../src/utils.c:289)
02/09/25 10:06:02 ERROR mmlib            : Unknown dir type (8) (mm_get_basedir() in ../src/utils.c:289)
02/09/25 10:06:02 ERROR mmlib            : Unknown dir type (9) (mm_get_basedir() in ../src/utils.c:289)
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Summary of Failures:

5/5 unit api tests FAIL            12.89s   421/422 subtests passed

Ok:                 4   
Expected Fail:      0   
Fail:               1   
Unexpected Pass:    0   
Skipped:            0   
Timeout:            0   

Full log written to /home/ben/src/forks/mmlib/build/meson-logs/testlog.txt