Frantisek Sumsal
974fe6131f
When we're running with sanitizers, sd-executor might pull in a
significant chunk of shared libraries on startup, that can cause a lot
of memory pressure and put us in the front when sd-oomd decides to go on
a killing spree. This is exacerbated further on Arch Linux when built
with gcc, as Arch ships unstripped gcc-libs so sd-executor pulls in over
30M of additional shared libs on startup:
~# lddtree build-san/systemd-executor
build-san/systemd-executor (interpreter => /lib64/ld-linux-x86-64.so.2)
libasan.so.8 => /usr/lib/libasan.so.8
libstdc++.so.6 => /usr/lib/libstdc++.so.6
libm.so.6 => /usr/lib/libm.so.6
libgcc_s.so.1 => /usr/lib/libgcc_s.so.1
libsystemd-core-255.so => /root/systemd/build-san/src/core/libsystemd-core-255.so
libaudit.so.1 => /usr/lib/libaudit.so.1
libcap-ng.so.0 => /usr/lib/libcap-ng.so.0
...
libseccomp.so.2 => /usr/lib/libseccomp.so.2
libubsan.so.1 => /usr/lib/libubsan.so.1
libc.so.6 => /usr/lib/libc.so.6
~# ls -Llh /usr/lib/libasan.so.8 /usr/lib/libstdc++.so.6 /usr/lib/libubsan.so.1
-rwxr-xr-x 1 root root 9.7M Feb 2 10:36 /usr/lib/libasan.so.8
-rwxr-xr-x 1 root root 21M Feb 2 10:36 /usr/lib/libstdc++.so.6
-rwxr-xr-x 1 root root 3.2M Feb 2 10:36 /usr/lib/libubsan.so.1
Sanitized libsystemd-core.so is also quite big:
~# ls -Llh /root/systemd/build-san/src/core/libsystemd-core-255.so /usr/lib/systemd/libsystemd-core-255.so
-rwxr-xr-x 1 root root 26M Feb 8 19:04 /root/systemd/build-san/src/core/libsystemd-core-255.so
-rwxr-xr-x 1 root root 5.9M Feb 7 12:03 /usr/lib/systemd/libsystemd-core-255.so
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