backtrace_drm_dbgsym

root@linaro-alip:~# ps -elf | grep xorg
4 S root      2249  2178  1  80   0 - 70372 SyS_ep 05:33 tty7     00:00:01 /usr/lib/xorg/Xorg -noli7
0 S root      2569  2273  0  80   0 -  1487 pipe_w 05:36 ttyMSM0  00:00:00 grep xorg
root@linaro-alip:~# gdb /usr/lib/xorg/Xorg 2249
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Reading symbols from /usr/lib/xorg/Xorg...(no debugging symbols found)...done.
Attaching to program: /usr/lib/xorg/Xorg, process 2249
[New LWP 2276]
[New LWP 2281]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/aarch64-linux-gnu/libthread_db.so.1".

0x0000ffffa1c77c00 in epoll_pwait () from /lib/aarch64-linux-gnu/libc.so.6
(gdb)
(gdb) continue
Continuing.

Thread 1 "Xorg" received signal SIGSEGV, Segmentation fault.
fd_batch_flush (batch=0x0, sync=true, force=false)
    at ../src/gallium/drivers/freedreno/freedreno_batch.c:370
370     ../src/gallium/drivers/freedreno/freedreno_batch.c: No such file or directory.
(gdb) backtrace full
#0  fd_batch_flush (batch=0x0, sync=true, force=false)
    at ../src/gallium/drivers/freedreno/freedreno_batch.c:370
        tmp = 0x0
        newbatch = false
#1  0x0000ffffa0578d80 in fd_bc_alloc_batch (cache=cache@entry=0xaaaadd0b6500,
    ctx=ctx@entry=0xaaaadd1ed0a0, nondraw=nondraw@entry=false)
    at ../src/gallium/drivers/freedreno/freedreno_batch_cache.c:310
        flush_batch = 0x0
        batch = <optimized out>
        idx = <optimized out>
#2  0x0000ffffa05790d0 in batch_from_key (ctx=0xaaaadd1ed0a0,
    key=0xaaaaddde0040, cache=0xaaaadd0b6500)
    at ../src/gallium/drivers/freedreno/freedreno_batch_cache.c:368
        batch = 0x0
        hash = 441022521
        entry = 0x0
        batch = <optimized out>
        hash = <optimized out>
        entry = <optimized out>
        idx = <optimized out>
        rsc = <optimized out>
#3  fd_batch_from_fb (cache=0xaaaadd0b6500, ctx=ctx@entry=0xaaaadd1ed0a0,
    pfb=pfb@entry=0xaaaadd1efd80)
--Type <RET> for more, q to quit, c to continue without paging--