.
Thread 5 (LWP 1491):
#0  syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
No locals.
#1  0x00007f774a41ed0a in ?? ()
No symbol table info available.
#2  0x0000000000000027 in ?? ()
No symbol table info available.
#3  0x000000000916d0d4 in ?? ()
No symbol table info available.
#4  0x000000000000000e in ?? ()
No symbol table info available.
#5  0x000000003b9ac554 in ?? ()
No symbol table info available.
#6  0x0000000000000000 in ?? ()
No symbol table info available.
.
Thread 4 (LWP 1468):
#0  0x00007f774965683d in poll () at ../sysdeps/unix/syscall-template.S:81
No locals.
#1  0x00007f774a3da33c in ?? ()
No symbol table info available.
#2  0x0000000000000000 in ?? ()
No symbol table info available.
.
Thread 3 (LWP 1467):
#0  0x00007f774965683d in poll () at ../sysdeps/unix/syscall-template.S:81
No locals.
#1  0x00007f774a3da33c in ?? ()
No symbol table info available.
#2  0x0000000000000020 in ?? ()
No symbol table info available.
#3  0x0000000101bd33a0 in ?? ()
No symbol table info available.
#4  0xffffffff7fffffff in ?? ()
No symbol table info available.
#5  0x4587a6a227170700 in ?? ()
No symbol table info available.
#6  0x0000000000000000 in ?? ()
No symbol table info available.
.
Thread 2 (LWP 1466):
#0  0x00007f774965683d in poll () at ../sysdeps/unix/syscall-template.S:81
No locals.
#1  0x00007f774a3da33c in ?? ()
No symbol table info available.
#2  0x00007fff2023cb3f in ?? ()
No symbol table info available.
#3  0x0000000101bbd000 in ?? ()
No symbol table info available.
#4  0x000000647fffffff in ?? ()
No symbol table info available.
#5  0x4587a6a227170700 in ?? ()
No symbol table info available.
#6  0x00007fff2023cb3f in ?? ()
No symbol table info available.
#7  0x0000000001bc5c10 in ?? ()
No symbol table info available.
#8  0x0000000000000001 in ?? ()
No symbol table info available.
#9  0x0000000000000000 in ?? ()
No symbol table info available.
.
Thread 1 (LWP 1465):
#0  0x00007f774a3e6859 in ?? ()
No symbol table info available.
#1  0x0000000001b88740 in ?? ()
No symbol table info available.
#2  0x00007f774a3f68cd in ?? ()
No symbol table info available.
#3  0x00007f774bc98a50 in ?? ()
No symbol table info available.
#4  0x0000000001b53ef0 in ?? ()
No symbol table info available.
#5  0x00007fff2023bc70 in ?? ()
No symbol table info available.
#6  0x00007f77000000ec in ?? ()
No symbol table info available.
#7  0x0000000001d11080 in ?? ()
No symbol table info available.
#8  0x0000000000000020 in ?? ()
No symbol table info available.
#9  0x0000000001d11f40 in ?? ()
No symbol table info available.
#10 0x00007fff2023bb70 in ?? ()
No symbol table info available.
#11 0x00007f774be8be58 in ?? ()
No symbol table info available.
#12 0x00007fff2023bbb0 in ?? ()
No symbol table info available.
#13 0x0000000001d16680 in ?? ()
No symbol table info available.
#14 0x00007f774a6b5c5f in ?? ()
No symbol table info available.
#15 0x0000000000000001 in ?? ()
No symbol table info available.
#16 0x00007fff2023bc40 in ?? ()
No symbol table info available.
#17 0x0000000001d0c2b0 in ?? ()
No symbol table info available.
#18 0x0000000000000000 in ?? ()
No symbol table info available.