Without this fix, we have randomly been getting CI failures due to
LeakSanitizer itself crashing after all the tests in a program have
succeeded. This has been happening randomly for a long time, but
https://gitlab.freedesktop.org/wayland/weston/-/merge_requests/1486
made it very reliably repeatable in the job x86_64-debian-full-build
(and no other job) in the test-subsurface-shot program.
--- Fixture 2 (GL) ok: passed 4, skipped 0, failed 0, total 4
Tracer caught signal 11: addr=0x1b8 pc=0x7f6b3ba640f0 sp=0x7f6b2cc77d10
==489==LeakSanitizer has encountered a fatal error.
I was also able to get a core file after twiddling, but there it ended
up with lsan aborting itself rather than a segfault.
We got some clues that use_tls=0 might work around this, from
https://github.com/google/sanitizers/issues/1342https://github.com/google/sanitizers/issues/1409
and some other projects that have cargo-culted the same workaround.
Using that cause more false leaks to appear, so they need to be
suppressed. I suppose we are not interested in catching leaks in glib
using code, so I opted to suppress g_malloc0 altogether. Pinpointing it
better might have required much more slower stack tracing.
wl_shm_buffer_begin_access() uses TLS, so no wonder it gets flagged.
ld-*.so is simply uninteresting to us, and it got flagged too.
Since this might have been fixed already in LeakSanitizer upstream, who
knows, leave some notes to revisit this when we upgrade that in CI.
This fix seems to make the branch of
https://gitlab.freedesktop.org/wayland/weston/-/merge_requests/1486
in my quick testing.
Suggested-by: Derek Foreman <derek.foreman@collabora.com>
Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.com>
As we can't really use `cleanup_after_cairo()` in our headless backend,
add more leak suppression entry, found while running the entire
test suite.
FcConfigSubstituteWithPat was already added (which seems to be main
source) but found a couple of more while running the entire suite.
The issue is that we need to set fast unwind to zero in order track
those leaks but that would result into some massive runtime penalty and
we get into the issue of timing out some of the tests.
So rather than doing that, just add the entire libconfig library and be
done with it. With it, this removes any pango/cairo former symbols as
that seems to catch all other leaks as well.
Signed-off-by: Marius Vlad <marius.vlad@collabora.com>
For some reason, the Debian CI setup leaks fontconfig allocations in a
way which it does not for me on Fedora. On the assumption that this has
been fixed between our older CI Debian and Fedora 36, suppress the leak
warning, because we do already call FcFini() which should free it.
Signed-off-by: Daniel Stone <daniels@collabora.com>
Pango, Cairo, and fontconfig, all want to leave thread-global data
hanging around in order to maintain a cache. Try to clean up as much of
it as we possibly can on exit, apart from the Pango language string
which appears to be unfreeable, so has been added to LSan suppressions.
Signed-off-by: Daniel Stone <daniels@collabora.com>
ASan will detect leaks also outside of the code we build, and sometimes
that external code leaks and we cannot work around it. Then we need to
suppress the leak reports to make our own ASan testing succeed. This
commit only introduces the suppressions file, making use of it CI is for
another time. This file is useful for manual targeted testing as below.
Start by suppressing two functions what weston-keyboard client ends up
calling, suppressing leak reports like these:
Indirect leak of 96 byte(s) in 3 object(s) allocated from:
#0 0x7fc109c3d518 in calloc (/lib/x86_64-linux-gnu/libasan.so.5+0xe9518)
#1 0x7fc109083d18 (/lib/x86_64-linux-gnu/libfontconfig.so.1+0x20d18)
#2 0x7fc1090849a7 in FcPatternDuplicate (/lib/x86_64-linux-gnu/libfontconfig.so.1+0x219a7)
#3 0x7fc109adf93e (/lib/x86_64-linux-gnu/libcairo.so.2+0xbb93e)
#4 0x7fc109adfc8d (/lib/x86_64-linux-gnu/libcairo.so.2+0xbbc8d)
#5 0x7fc109aa02e7 in cairo_toy_font_face_create (/lib/x86_64-linux-gnu/libcairo.so.2+0x7c2e7)
#6 0x7fc109aa856c in cairo_select_font_face (/lib/x86_64-linux-gnu/libcairo.so.2+0x8456c)
#7 0x5603cb49a06a in redraw_handler ../../git/weston/clients/keyboard.c:378
#8 0x5603cb4b506b in widget_redraw ../../git/weston/clients/window.c:4520
#9 0x5603cb4b55da in surface_redraw ../../git/weston/clients/window.c:4578
#10 0x5603cb4b5750 in idle_redraw ../../git/weston/clients/window.c:4607
#11 0x5603cb4bebe3 in display_run ../../git/weston/clients/window.c:6525
#12 0x5603cb49e55d in main ../../git/weston/clients/keyboard.c:1054
#13 0x7fc1092a709a in __libc_start_main ../csu/libc-start.c:308
#14 0x5603cb499019 in _start (/home/pq/build/weston-meson/clients/weston-keyboard+0x19019)
Indirect leak of 528 byte(s) in 51 object(s) allocated from:
#0 0x7fc109b8e810 in strdup (/lib/x86_64-linux-gnu/libasan.so.5+0x3a810)
#1 0x7fc109082fc4 in FcValueSave (/lib/x86_64-linux-gnu/libfontconfig.so.1+0x1ffc4)
#2 0x7fc109083d2e (/lib/x86_64-linux-gnu/libfontconfig.so.1+0x20d2e)
#3 0x7fc1090852c7 (/lib/x86_64-linux-gnu/libfontconfig.so.1+0x222c7)
#4 0x7fc10908c28b (/lib/x86_64-linux-gnu/libfontconfig.so.1+0x2928b)
#5 0x7fc108603a15 (/lib/x86_64-linux-gnu/libexpat.so.1+0xba15)
#6 0x7fc1086044bb (/lib/x86_64-linux-gnu/libexpat.so.1+0xc4bb)
#7 0x7fc108601f8a (/lib/x86_64-linux-gnu/libexpat.so.1+0x9f8a)
#8 0x7fc108602e7a (/lib/x86_64-linux-gnu/libexpat.so.1+0xae7a)
#9 0x7fc108606a37 in XML_ParseBuffer (/lib/x86_64-linux-gnu/libexpat.so.1+0xea37)
#10 0x7fc10908a0fa (/lib/x86_64-linux-gnu/libfontconfig.so.1+0x270fa)
#11 0x7fc10908a519 (/lib/x86_64-linux-gnu/libfontconfig.so.1+0x27519)
#12 0x7fc10908a73a (/lib/x86_64-linux-gnu/libfontconfig.so.1+0x2773a)
#13 0x7fc10908b48f (/lib/x86_64-linux-gnu/libfontconfig.so.1+0x2848f)
#14 0x7fc108603a15 (/lib/x86_64-linux-gnu/libexpat.so.1+0xba15)
#15 0x7fc1086044bb (/lib/x86_64-linux-gnu/libexpat.so.1+0xc4bb)
#16 0x7fc108601f8a (/lib/x86_64-linux-gnu/libexpat.so.1+0x9f8a)
#17 0x7fc108602e7a (/lib/x86_64-linux-gnu/libexpat.so.1+0xae7a)
#18 0x7fc108606a37 in XML_ParseBuffer (/lib/x86_64-linux-gnu/libexpat.so.1+0xea37)
#19 0x7fc10908a0fa (/lib/x86_64-linux-gnu/libfontconfig.so.1+0x270fa)
#20 0x7fc10908a519 (/lib/x86_64-linux-gnu/libfontconfig.so.1+0x27519)
#21 0x7fc10907c4b3 (/lib/x86_64-linux-gnu/libfontconfig.so.1+0x194b3)
#22 0x7fc10907c715 (/lib/x86_64-linux-gnu/libfontconfig.so.1+0x19715)
#23 0x7fc10906e8e6 (/lib/x86_64-linux-gnu/libfontconfig.so.1+0xb8e6)
#24 0x7fc109070928 in FcConfigSubstituteWithPat (/lib/x86_64-linux-gnu/libfontconfig.so.1+0xd928)
#25 0x7fc109ae2d6b (/lib/x86_64-linux-gnu/libcairo.so.2+0xbed6b)
#26 0x7fc109a8aba2 in cairo_scaled_font_create (/lib/x86_64-linux-gnu/libcairo.so.2+0x66ba2)
#27 0x7fc109a50d1d (/lib/x86_64-linux-gnu/libcairo.so.2+0x2cd1d)
#28 0x7fc109a53be0 (/lib/x86_64-linux-gnu/libcairo.so.2+0x2fbe0)
#29 0x7fc109a4c1df (/lib/x86_64-linux-gnu/libcairo.so.2+0x281df)
#30 0x7fc109aa8dab in cairo_text_extents (/lib/x86_64-linux-gnu/libcairo.so.2+0x84dab)
#31 0x5603cb499af3 in draw_key ../../git/weston/clients/keyboard.c:329
#32 0x5603cb49a30c in redraw_handler ../../git/weston/clients/keyboard.c:392
#33 0x5603cb4b506b in widget_redraw ../../git/weston/clients/window.c:4520
#34 0x5603cb4b55da in surface_redraw ../../git/weston/clients/window.c:4578
#35 0x5603cb4b5750 in idle_redraw ../../git/weston/clients/window.c:4607
#36 0x5603cb4bebe3 in display_run ../../git/weston/clients/window.c:6525
#37 0x5603cb49e55d in main ../../git/weston/clients/keyboard.c:1054
#38 0x7fc1092a709a in __libc_start_main ../csu/libc-start.c:308
#39 0x5603cb499019 in _start (/home/pq/build/weston-meson/clients/weston-keyboard+0x19019)
With the command line
ASAN_OPTIONS=fast_unwind_on_malloc=0,malloc_context_size=50 \
LSAN_OPTIONS=suppressions=/home/pq/git/weston/.gitlab-ci/leak-sanitizer.supp \
./tests/test-viewporter test_viewporter_double_create
Suppressions used:
count bytes template
5 357 cairo_select_font_face
130 9104 cairo_text_extents
Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.com>
