While freeswitch is running and we call 1 client to another client then another client pick the call then code is dumped and throwing following error.
I am trying allocate the memory for that function but nothing happens.
Core was generated by `./freeswitch'.
Program terminated with signal SIGSEGV, Segmentation fault.
0 0x00007fb18e95a771 in H245NegLogicalChannels::FindChannelBySession (
this=<optimized out>, rtpSessionId=rtpSessionId#entry=0,
fromRemote=fromRemote#entry=false, anyState=anyState#entry=false)
at /root/opal/src/h323/h323neg.cxx:1097
warning: Source file is more recent than executable.
1097 if (channel != NULL && (rtpSessionId == 0 || channel->GetSessionID() == >rtpSessionId) &&
(gdb)
Related
The main topic is to write a code in C++ for Hash with Chaining (using single link list).here, data has been provided in terms of array of long datatype and we have to store them in hash(table size 13) in a sorted manner.
Here is my code for the same.
https://onlinegdb.com/B1pbgjxAI
There is no compiler error in the code but while running the code the following error arises.
*** buffer overflow detected ***: ./Solution terminated
Reading symbols from Solution...done.
[New LWP 86657]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
Core was generated by `./Solution'.
Program terminated with signal SIGABRT, Aborted.
#0 __GI_raise (sig=sig#entry=6) at ../sysdeps/unix/sysv/linux/raise.c:50
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info "(gdb)Auto-loading safe path"
Here, for the testcase, input is
201911169
and the output should be
93
In line 36 you're calling strcpy(p->name,Name), but Name is passed from x in main, and char x[4] isn't null-terminated as you only assign to x[j] for j from 2 downto 0. Add a statement x[3] = '\0';.
I get the following error when I execute a fortran code compiled with gfortran. The error is followed by a backtrace for this error pointing to memory locations.
Program received signal SIGSEGV: Segmentation fault - invalid memory reference.
Backtrace for this error:
#0 0x2b2f8e39da2d in ???
#1 0x2b2f8e39cc63 in ???
#2 0x311823256f in ???
#3 0x311827a7be in ???
#4 0x2b2f8e39cff2 in ???
#5 0x2b2f8e4adde6 in ???
#6 0x2b2f8e4ae047 in ???
#7 0x2b2f8e4a62d7 in ???
#8 0x40482a in instrument_
at /home/user/model/instrument.f:90
#9 0x406c1e in funcdet
at /home/user/model/funcsynth.f:67
#10 0x406c98 in main
at /home/user/model/funcsynth.f:78
Segmentation fault (core dumped)
I would like to know where the first instance of error arises - is it the first line of the backtrace or the lastline? Also, strategies that might help me debug the issue.
Update:
Upon backtracing, the line 90 of instrument involves opening a file like so:
out_file3 = 'new_file'
OPEN(unit=3,file=out_file3,status='unknown')
To determine the issue behind I've incorporated error checking by doing so:
OPEN(unit=3,file=out_file3,status='unknown',iostat=io_status, err=100)
100 write(STDOUT,*) 'io status=', io_status
The code exits with the error:
Error: Invalid value for ERR specification at (1). How do I determine the appropriate value for ERR specification? This led me to suspect that unit=3 might be the cause for error, I've changed the value for unit, but everytime get the "Segmentation fault (core dumped)" error.
Update 2:
OPEN(unit=3,file=out_file3,status='unknown',err=17)
17 write(STDOUT,*) 'Problem'
Still get the Segmentation fault (core dumped) error at the line corresponding to OPEN.... I can only guess that unit=3 is the root cause of the problem.
Update 3
Attempt at a self sufficient example:
character*280 testfile,finalfile,outfile
DIR = '/storage/work/user/'
testfile = 'test.dat'
CALL getenv(DIR,outfile)
CALL sappend(outfile,testfile,finalfile)
OPEN(unit=3,file=finalfine,status='new')
write(3,*) 'Test'
END
I have a script get_new_GMC.sh that contains this line:
./casm.x < input_to_casm.txt
However, sometimes we might get a segmentation fault (and sometimes we do not)... Sometimes it would have the error:
get_new_GMC.sh: line 156: 72577 Segmentation fault: 11 ./casm.x <
input_to_casm.txt
How could I change my script so that whenever a segmentation fault occurs, I would just rerun ./casm.x < input_to_casm.txt again? Thank you.
I have this crash log on a Core Audio application I'm developping. I'm currently debugging it, so my question isn't about the crash itself, but about the meaning of 'k' packet.
What does it mean ?
I've read this, and this (about inferior process), but I'm not sure to understand.
CRASH LOG EXTRACT
26/05/14 15:12:37,469 coreaudiod[170]: Disabled automatic stack shots because audio IO is active
26/05/14 15:13:40,352 com.apple.debugserver-300.2[1587]: Got a 'k' packet, killing the inferior process.
26/05/14 15:13:40,353 com.apple.debugserver-300.2[1587]: Sending ptrace PT_KILL to terminate
inferior process.
26/05/14 15:13:40,353 com.apple.debugserver-300.2[1587]: 2 +70.908045 sec [0633/0303]: error: ::ptrace (request = PT_THUPDATE, pid = 0x0634, tid = 0x2003, signal = 0) err = Resource busy (0x00000010)
26/05/14 15:13:40,354 com.apple.debugserver-300.2[1587]: 3 +0.000258 sec [0633/0303]: error: ::task_info ( target_task = 0x1803, flavor = TASK_BASIC_INFO, task_info_out => 0x7fff5a8ecfa0, task_info_outCnt => 10 ) err = (os/kern) invalid argument (0x00000004)
26/05/14 15:13:40,362 coreaudiod[170]: Enabled automatic stack shots because audio IO is inactive
26/05/14 15:13:40,369 _coreaudiod[1607]: audit warning: allsoft 26/05/14 15:13:40,369 _coreaudiod[1606]: audit warning: soft/var/audit
26/05/14 15:13:40,370 _coreaudiod[1608]: audit warning: closefile /var/audit/20140526131229.20140526131340
A k Packet is a kill command, received by GDB and executed upon the "inferior process," to wit, killing the application being debugged.
GDB can be controlled by a remote machine, and the commands it receives remotely (or locally through the interface) are in the form of formatted TCP packets, hence the name.
Is there a way to get the instruction pointer of a running application Unix?
I have a running process (C++) and want to get its current location, and thereafter in GDB (on a different machine) map the location to source location ('list' command).
On Linux, there is /proc/[pid]/stat.
From "man proc":
stat Status information about the process. This is used by
ps(1). It is defined in /usr/src/linux/fs/proc/array.c.
...
kstkeip %lu
The current EIP (instruction pointer).
AFAICT, the 29th field of the output corresponds to the current instruction pointer of the process. For example:
gdb date
GNU gdb Red Hat Linux (6.0post-0.20040223.20rh)
Copyright 2004 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
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This GDB was configured as "x86_64-redhat-linux-gnu"...(no debugging symbols found)...Using host libthread_db library "/lib64/tls/libthread_db.so.1".
(gdb) set stop-on-solib-events 1
(gdb) run
(no debugging symbols found)...(no debugging symbols found)...(no debugging symbols found)...[Thread debugging using libthread_db enabled]
[New Thread 182896391360 (LWP 27968)]
(no debugging symbols found)...Stopped due to shared library event
(gdb) c
[Switching to Thread 182896391360 (LWP 27968)]
Stopped due to shared library event
(gdb) where
#0 0x00000036b060bb20 in _dl_debug_state_internal () from /lib64/ld-linux-x86-64.so.2
#1 0x00000036b060b51c in _dl_init_internal () from /lib64/ld-linux-x86-64.so.2
#2 0x00000036b0600f72 in _dl_start_user () from /lib64/ld-linux-x86-64.so.2
#3 0x0000000000000001 in ?? ()
#4 0x0000007fbff62728 in ?? ()
#5 0x0000000000000000 in ?? ()
(gdb) shell cat /proc/27968/stat
27968 (date) T 27839 27968 8955 34817 27839 4194304 42 0 330 0 0 0 0 0 18 0 0 0 1881668573 6144000 78 18446744073709551615 4194304 4234416 548680739552 18446744073709551615 234887363360 0 0 0 0 18446744071563322838 0 0 17 0 0 0 0 0 0 0
(gdb) p/a 234887363360 <--- the value of 29th field
$1 = 0x36b060bb20 <_dl_debug_state_internal>
The instruction pointer can be retrieved on Linux with the following code:
pid_t traced_process;
struct user_regs_struct regs;
ptrace(PTRACE_ATTACH, traced_process, NULL, NULL);
ptrace(PTRACE_GETREGS, traced_process, NULL, ®s);
printf("EIP: %lx\n", regs.eip);
You will need to temporarily stop the process or thread in order to get its current instruction pointer. You can do it by attaching to the process with ptrace() or (on HP-UX) ttrace() and accessing the registers.
If you're using gdb anyway, you can simply attach yourself to a running process like this:
gdb program 1234
where program is the name of the executable you're debugging, and 1234 is the PID. You can then use all of the facilities of gdb to debug the process.