A program I compiled and executed (by a shell script, as another user) sometimes crashes:
./run.sh: line 19: 7964 Segmentation fault (core dumped) ./Program ARG1 ARG2 ARG3 2>&1
I wanted to take a look at the core file to figure out where the crash might have happened. Unfortunately, there's no standard core file to be found, but apparently Ubuntu called it's default crash handler apport, which says in its log:
ERROR: apport (pid 8841) Mon Jun 2 17:59:04 2014: called for pid 7964, signal 11, core limit 0
ERROR: apport (pid 8841) Mon Jun 2 17:59:04 2014: executable: /path/to/Program (command line "./Program ARG1 ARG2 ARG3")
ERROR: apport (pid 8841) Mon Jun 2 17:59:04 2014: is_closing_session(): no DBUS_SESSION_BUS_ADDRESS in environment
ERROR: apport (pid 8841) Mon Jun 2 17:59:16 2014: wrote report /var/crash/_path_to_Program.1001.crash
I've been trying to process the crash dump file with apport-retrace, but apport doesn't handle the file very well because it apparently expects Ubuntu-specific packages: ERROR: report file does not contain one of the required fields: CoreDump DistroRelease Package ExecutablePath
Looking at the crash dump file, I think there's important debugging information inside, so my question: is there another way to process this file, either with gdb, or extract a core dump file from it if the core dump is indeed stored inside?
For reference, here's (partially) the .crash file:
ProblemType: Crash
Architecture: amd64
Date: Mon Jun 2 17:59:04 2014
DistroRelease: Ubuntu 13.04
ExecutablePath: /path/to/Program
ExecutableTimestamp: 1401723071
ProcCmdline: ./Program ARG1 ARG2 ARG3
ProcCwd: /path/to
ProcEnviron: PATH=(custom, no user)
ProcMaps:
... (memory map left out)
ProcStatus:
Name: Program
State: S (sleeping)
Tgid: 7964
Pid: 7964
PPid: 7963
TracerPid: 0
Uid: 1001 1001 1001 1001
Gid: 1001 1001 1001 1001
FDSize: 64
Groups: 4 27 1001
VmPeak: 1009888 kB
VmSize: 1009884 kB
VmLck: 0 kB
VmPin: 0 kB
VmHWM: 205400 kB
VmRSS: 205400 kB
VmData: 762620 kB
VmStk: 136 kB
VmExe: 3312 kB
VmLib: 64144 kB
VmPTE: 852 kB
VmSwap: 0 kB
Threads: 9
SigQ: 0/127009
SigPnd: 0000000000000000
ShdPnd: 0000000000000000
SigBlk: 0000000000000000
SigIgn: 0000000000001206
SigCgt: 0000000180000000
CapInh: 0000000000000000
CapPrm: 0000000000000000
CapEff: 0000000000000000
CapBnd: 0000001fffffffff
Seccomp: 0
Cpus_allowed: ff
Cpus_allowed_list: 0-7
Mems_allowed: 00000000,00000001
Mems_allowed_list: 0
voluntary_ctxt_switches: 3669360
nonvoluntary_ctxt_switches: 85456
Signal: 11
Uname: Linux 3.8.0-35-generic x86_64
UserGroups: adm sudo
CoreDump: base64
H4sICAAAAAAC/0NvcmVEdW1wAA==
... (huge base64 encoded string left out)
