>> Subject: [PATCH v11 0/6] add trace points in ethdev library >> >> This series adds trace points for functions in the ethdev library. >> The trace points are added in ethdev, flow, mtr and tm files. >> > >Hi Ankur, > >Testpmd segfaults at startup in debug mode on ppc64le, and git-bisect points >to this patchset. > >Can you please have a look at this report and advise? >https://urldefense.proofpoint.com/v2/url?u=https-3A__bugs.dpdk.org_show- >5Fbug.cgi-3Fid- >3D1167&d=DwIGaQ&c=nKjWec2b6R0mOyPaz7xtfQ&r=ILjiNF3GF25y6QdHZUx >Ml6JrStU0MIuCtO5dMzn3Ybk&m=ad6ec2gAyVV5afbEEECkli0mGpPEcNRvH- >1nG- >w_L0RL5nEBXxJSx7S8dGsIZtez&s=WnG_4fFPmmCIrVd8C7ybl7UHp3FBwiVtUal >27pGGPY4&e=
This bug is caused while assigning the bitfields variables in conf structure to local variables. uint16_t peer_count = conf->peer_count; uint8_t tx_explicit = conf->tx_explicit; ... This happens during trace point registration. The address in conf pointer is 0x1100c which looks like an invalid address. So referencing the pointer causes the segmentation fault. It looks to me, that the bit fields inside a structure cannot be captured like this as structure pointer can contain stale or invalid address at trace point registration. I will send a patch to fix this bug. > >Thanks, >Ali
