In case cwd is changed during the execution of given BASH_SOURCE, i.e.,
when the dirstack is mangled by calls to cd, the actual executable may
end up missing from the path when run directly from its directory in
the ./ fashion. Example:
[root@fedora31 fuzz]# ./autofuzz.sh --module=vhost --transport=all
autofuzz.sh cds into the $rootdir hence the BASH_SOURCE[i] in form of
./autofuzz.sh won't be found there, thus during a failure, since run
under a debug tracer, nl will fail with -ENOENT while trying to read
it.
To mitigate, check if $src is available for reading, if not, log that
the backtrace is not available.
Change-Id: I68988350ba36cca8464bdfac437f662ed4c30f67
Signed-off-by: Michal Berger <michallinuxstuff@gmail.com>
Reviewed-on: https://review.gerrithub.io/c/spdk/spdk/+/482694
Community-CI: Broadcom SPDK FC-NVMe CI <spdk-ci.pdl@broadcom.com>
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Darek Stojaczyk <dariusz.stojaczyk@intel.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
Reviewed-by: Karol Latecki <karol.latecki@intel.com>
1baf379e69