FS#75718 - [bpftrace] 0.15.0-2 segfaults with bcc 0.25.0-1
Attached to Project:
Community Packages
Opened by Fotis Xenakis (foxen) - Sunday, 28 August 2022, 16:31 GMT
Last edited by Anatol Pomozov (anatolik) - Monday, 29 August 2022, 18:56 GMT
Opened by Fotis Xenakis (foxen) - Sunday, 28 August 2022, 16:31 GMT
Last edited by Anatol Pomozov (anatolik) - Monday, 29 August 2022, 18:56 GMT
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Details
Description:
bpftrace segfaults at startup when running any program. This is due to incompatibility with bcc 0.25.0-1 (libbcc_bpf.so). Presumably, bpftrace was built against bcc 0.24.0, but not updated when bcc was updated to 0.25.0 (bpftrace 0.15.0 fails to build with bcc 0.25.0, so I guess the package should require bcc 0.24.0?). Stack trace attached (segfault due to wrong arguments to bcc_prog_load_xattr from libbcc_bpf.so) Additional info: - bpftrace 0.15.0-2 - bcc 0.25.0-1 - bcc commit introducing incompatibility (introduced in 0.25.0): https://github.com/iovisor/bcc/commit/185143bdec6134255363446f644acd766ffb3825 - bpftrace commit updating for it (in master, unreleased): https://github.com/iovisor/bpftrace/commit/fc940d31be140d54ceb4c7ae47371785f0b26b65 Steps to reproduce: Run any program with bpftrace, e.g. # bpftrace -e 'BEGIN { printf("Hello, world\n"); }' 
trace.log
(2.3 KiB)
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This task depends upon
Closed by Anatol Pomozov (anatolik)
Monday, 29 August 2022, 18:56 GMT
Reason for closing: Fixed
Additional comments about closing: bpftrace-0.15.0-3
Monday, 29 August 2022, 18:56 GMT
Reason for closing: Fixed
Additional comments about closing: bpftrace-0.15.0-3
I am looking at a way to get bpftrace patched against bcc 0.25, Upstream `master` branch fixed this compilation issue but it looks like backporting it to 0.25 is non-trivial. github user @martinetd provided a patch for 0.25, see https://github.com/iovisor/bpftrace/issues/2340
```
sudo bpftrace -e 'BEGIN { printf("Hello, world\n"); }'
Attaching 1 probe...
Hello, world
```