Open devidasjadhav opened 2 weeks ago
even tracepoint from tracefs shows same.
echo 1 > /sys/kernel/tracing/events/signal/signal_generate/enable
sh-72340 [003] dN.2. 9457.683068: signal_generate: sig=17 errno=0 code=1 comm=python pid=1258 grp=1 res=1
grep-72348 [002] dN.2. 9458.691583: signal_generate: sig=17 errno=0 code=1 comm=sh pid=72347 grp=1 res=0
sh-72347 [004] dN.2. 9458.692029: signal_generate: sig=17 errno=0 code=1 comm=python pid=1258 grp=1 res=1
cat-72352 [001] dN.2. 9459.257847: signal_generate: sig=17 errno=0 code=1 comm=bash pid=72351 grp=1 res=0
grep-72353 [003] dN.2. 9459.258953: signal_generate: sig=17 errno=0 code=1 comm=bash pid=72351 grp=1 res=2
wc-72354 [005] dN.2. 9459.259009: signal_generate: sig=17 errno=0 code=1 comm=bash pid=72351 grp=1 res=2
bash-72351 [004] dN.2. 9459.259594: signal_generate: sig=17 errno=0 code=1 comm=bash pid=72350 grp=1 res=0
expr-72355 [001] dN.2. 9459.263742: signal_generate: sig=17 errno=0 code=1 comm=bash pid=72350 grp=1 res=0
expr-72356 [003] dN.2. 9459.267340: signal_generate: sig=17 errno=0 code=1 comm=bash pid=72350 grp=1 res=0
expr-72357 [002] dN.2. 9459.270904: signal_generate: sig=17 errno=0 code=1 comm=bash pid=72350 grp=1 res=0
expr-72358 [003] dN.2. 9459.274404: signal_generate: sig=17 errno=0 code=1 comm=bash pid=72350 grp=1 res=0
expr-72359 [002] dN.2. 9459.277936: signal_generate: sig=17 errno=0 code=1 comm=bash pid=72350 grp=1 res=0
expr-72360 [003] dN.2. 9459.281515: signal_generate: sig=17 errno=0 code=1 comm=bash pid=72350 grp=1 res=0
bash-72350 [005] dN.2. 9459.282323: signal_generate: sig=17 errno=0 code=1 comm=sh pid=72349 grp=1 res=0
sh-72349 [003] dN.2. 9459.282712: signal_generate: sig=17 errno=0 code=1 comm=python pid=1258 grp=1 res=1
surprisingly with -k
its working fine.
So Now in my setup tracepoint version of code is not performing as expected.
Can @chenhengqi please verify if its working in your setup ?
to test a PR I used
sigsnoop
with kill utility. got signal value 17. So I reverted that patch. same result.so I added
bpf_printk
and verified that value.it was 17 even with
bpf_printk
.Value in ctx-sig. is 17.
I am using Debian 11 with 6.1.0-11-amd64 kernel.
Steps to reproduce.
kill -n 19 1234
kill -n 18 1234