Jemalloc library is hitting Segmentation fault on CentOS-7

[Jason Evans]

Hi Ramesh,

This crash is happening inside glibc, perhaps due to recursive allocation failing despite a temporary bootstrap allocation environment having been set up inside jemalloc.  Are you able to determine whether something is going wrong during a malloc() (or similar) call inside get_nprocs()?

I'm in the process of setting up a CentOS 7 system right now, but it will take some time before I can reproduce this.

Thanks,
Jason

> On Aug 25, 2016, at 2:27 AM, Ramesh Sivaraman <ramesh.sivaraman at percona.com> wrote:
> 
> Hi Team,
> 
> Forgot to mention version details
> 
> jemalloc.x86_64  : 3.6.0-3.el7 
> 
> On Thu, Aug 25, 2016 at 2:49 PM, Ramesh Sivaraman <ramesh.sivaraman at percona.com> wrote:
> Hi Team,
> 
> Jemalloc library is hitting  Segmentation fault on CentOS-7
> 
> With debug library Segmentation fault issue triggering with simple `ls` command.
> 
> $ export LD_PRELOAD=/usr/lib/debug/usr/lib64/libjemalloc.so.1.debug
> $ ls
> Segmentation fault (core dumped)
> $
> 
> Also seeing a segmentation fault issue (same issue?) with non-debug jemalloc
> 
> $ export LD_PRELOAD=/usr/lib64/libjemalloc.so.1 
> $ ./bin/mysqld --version
> Segmentation fault (core dumped)
> $ gdb ./bin/mysqld core.11345.mysqld.11 
> [..]
> (gdb) bt
> +bt
> #0  0x00007f1c21fa5964 in get_nprocs () from /lib64/libc.so.6
> #1  0x00007f1c21f70b0c in sysconf () from /lib64/libc.so.6
> #2  0x00007f1c26efebd0 in malloc_ncpus () at src/jemalloc.c:256
> #3  malloc_init_hard () at src/jemalloc.c:776
> #4  0x00007f1c26f01705 in malloc_init () at src/jemalloc.c:292
> #5  calloc (num=1, size=32) at src/jemalloc.c:1123
> #6  0x00007f1c22eb1690 in _dlerror_run () from /lib64/libdl.so.2
> #7  0x00007f1c22eb1198 in dlsym () from /lib64/libdl.so.2
> #8  0x00007f1c23f88fec in ?? () from /lib64/libasan.so.0
> #9  0x00007f1c23f7b2c9 in ?? () from /lib64/libasan.so.0
> #10 0x00007f1c23f7d91b in __asan_init_v1 () from /lib64/libasan.so.0
> #11 0x00007f1c271426c3 in _dl_init_internal () from /lib64/ld-linux-x86-64.so.2
> #12 0x00007f1c2713445a in _dl_start_user () from /lib64/ld-linux-x86-64.so.2
> #13 0x0000000000000002 in ?? ()
> #14 0x00007fff9d552740 in ?? ()
> #15 0x00007fff9d55274d in ?? ()
> #16 0x0000000000000000 in ?? ()
> (gdb) 
> 
> -- 
> Best Regards,
> 
> Ramesh
> 
> 
> 
> 
> 
> -- 
> Best Regards,
> 
> Ramesh Sivaraman
> QA Engineer, Percona
> http://www.percona.com/
> Phone : +91 8606432991
> Skype : rameshvs02
> 
> 
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