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Merge pull request #847 from pi-hole/tweak/valgrind

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Tweaks for the valgrind guide
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yubiuser
2023-01-28 14:33:48 +01:00
committed by GitHub
parent 9289dc9be6 3bf22e7ce1
commit eb451533ad
1 changed files with 16 additions and 2 deletions
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docs/ftldns/valgrind.md
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@@ -44,13 +44,27 @@ They'll automatically be re-added when using `sudo service pihole-FTL start` nex
We suggest the following one-liner to run `pihole-FTL` in `memcheck`:
```
sudo rm /dev/shm/FTL-*; sudo valgrind --trace-children=yes --leak-check=full --track-origins=yes -s /usr/bin/pihole-FTL &> valgrind.log
sudo service pihole-FTL stop && sudo setcap -r /usr/bin/pihole-FTL
sudo valgrind --trace-children=yes --leak-check=full --track-origins=yes --log-file=valgrind.log -s /usr/bin/pihole-FTL
```
If you compile FTL from source, use
```
sudo rm /dev/shm/FTL-*; ./build.sh && sudo valgrind --trace-children=yes --leak-check=full --track-origins=yes -s ./pihole-FTL &> valgrind.log
sudo service pihole-FTL stop && sudo setcap -r /usr/bin/pihole-FTL
./build.sh && sudo valgrind --trace-children=yes --leak-check=full --track-origins=yes --log-file=valgrind.log -s ./pihole-FTL
```
The most useful information (about which memory is *possibly* and which is *definitely* lost) is written to `valgrind.log` at the end of the analysis. Terminate FTL by running:
```bash
sudo kill -TERM $(cat /var/run/pihole-FTL.pid)
```
and immediately restart it (and fix permissions) using
```bash
sudo service pihole-FTL start
```
The used options are: