stack trace of adb server by gdb

gdb_adb_server0.txt

koba@koba-linux2:/opt/koba/android-ics.kzm/system/core/adb$ ps ax |grep adb
13998 pts/5    Sl     0:00 adb fork-server server
14034 pts/5    S+     0:00 grep --color=auto adb
koba@koba-linux2:/opt/koba/android-ics.kzm/system/core/adb$ which adb
/opt/koba/android-ics.kzm/out/host/linux-x86/bin/adb
koba@koba-linux2:/opt/koba/android-ics.kzm/system/core/adb$ gdb /opt/koba/android-ics.kzm/out/host/linux-x86/bin/adb 13998
GNU gdb (GDB) 7.1-ubuntu
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-linux-gnu".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>...
Reading symbols from /opt/koba/android-ics.kzm/out/host/linux-x86/bin/adb...done.
Attaching to program: /opt/koba/android-ics.kzm/out/host/linux-x86/bin/adb, process 13998
Reading symbols from /lib32/librt.so.1...(no debugging symbols found)...done.
Loaded symbols for /lib32/librt.so.1
Reading symbols from /lib32/libncurses.so.5...(no debugging symbols found)...done.
Loaded symbols for /lib32/libncurses.so.5
Reading symbols from /lib32/libpthread.so.0...(no debugging symbols found)...done.
[Thread debugging using libthread_db enabled]
[New Thread 0xf7ccfb70 (LWP 13999)]
Loaded symbols for /lib32/libpthread.so.0
Reading symbols from /usr/lib32/libstdc++.so.6...(no debugging symbols found)...done.
Loaded symbols for /usr/lib32/libstdc++.so.6
Reading symbols from /lib32/libm.so.6...(no debugging symbols found)...done.
Loaded symbols for /lib32/libm.so.6
Reading symbols from /usr/lib32/libgcc_s.so.1...(no debugging symbols found)...done.
Loaded symbols for /usr/lib32/libgcc_s.so.1
Reading symbols from /lib32/libc.so.6...(no debugging symbols found)...done.
Loaded symbols for /lib32/libc.so.6
Reading symbols from /lib/ld-linux.so.2...
warning: the debug information found in "/lib/ld-2.11.1.so" does not match "/lib/ld-linux.so.2" (CRC mismatch).

(no debugging symbols found)...done.
Loaded symbols for /lib/ld-linux.so.2
0xf7fdf430 in __kernel_vsyscall ()
(gdb) info thread
  2 Thread 0xf7ccfb70 (LWP 13999)  0xf7fdf430 in __kernel_vsyscall ()
* 1 Thread 0xf7cd06d0 (LWP 13998)  0xf7fdf430 in __kernel_vsyscall ()
(gdb) bt
#0  0xf7fdf430 in __kernel_vsyscall ()
#1  0xf7d9aa81 in select () from /lib32/libc.so.6
#2  0x0805f3ea in fdevent_process () at system/core/adb/fdevent.c:378
#3  0x0805fc95 in fdevent_loop () at system/core/adb/fdevent.c:689
#4  0x0804c37b in adb_main (is_daemon=1, server_port=5037)
    at system/core/adb/adb.c:979
#5  0x080538b2 in adb_commandline (argc=0, argv=0xffffcfc8)
    at system/core/adb/commandline.c:915
#6  0x0804b28f in main (argc=3, argv=0xffffcfc4) at system/core/adb/adb.c:1279
(gdb) thread 2
[Switching to thread 2 (Thread 0xf7ccfb70 (LWP 13999))]#0  0xf7fdf430 in __kernel_vsyscall ()
(gdb) bt
#0  0xf7fdf430 in __kernel_vsyscall ()
#1  0xf7d6b096 in nanosleep () from /lib32/libc.so.6
#2  0xf7d6aec0 in sleep () from /lib32/libc.so.6
#3  0x0805ed24 in device_poll_thread (unused=0x0)
    at system/core/adb/usb_linux.c:666
#4  0xf7f6c96e in start_thread () from /lib32/libpthread.so.0
#5  0xf7da1b5e in clone () from /lib32/libc.so.6
(gdb)