Inside the Android device:

ps gave "1183" as PID of com.adobe.reader process:

root@android:/proc/31 # gdbserver :4444 --attach 1183
Attached; pid = 1183
Listening on port 4444


Then remotely in PC host:

/opt/android-ndk-r8e/toolchains/arm-linux-androideabi-4.6/prebuilt/linux-x86/bin/arm-linux-androideabi-gdb
GNU gdb (GDB) 7.3.1-gg2
Copyright (C) 2011 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
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 "--host=x86_64-linux-gnu --target=arm-linux-android".
For bug reporting instructions, please see:
<http://source.android.com/source/report-bugs.html>.
(gdb) target remote :4444
Remote debugging using :4444
0x40037ebc in ?? ()
(gdb) bt
#0  0x40037ebc in ?? ()
#1  0x400c0ac0 in ?? ()
#2  0x400c0ac0 in ?? ()
Backtrace stopped: previous frame identical to this frame (corrupt stack?)
(gdb)


And the gdbserver side:

Remote debugging from host 127.0.0.1


<http://source.android.com/source/report-bugs.html>.
(gdb) target remote :4444
Remote debugging using :4444
0x40037ebc in ?? ()
(gdb) bt
#0  0x40037ebc in ?? ()
#1  0x400c0ac0 in ?? ()
#2  0x400c0ac0 in ?? ()
Backtrace stopped: previous frame identical to this frame (corrupt stack?)
(gdb) x /10i $pc
=> 0x40037ebc:	pop	{r4, r7}
   0x40037ec0:	movs	r0, r0
   0x40037ec4:	bxpl	lr
   0x40037ec8:	b	0x4005be6c
   0x40037ecc:	push	{r4, r7}
   0x40037ed0:	mov	r7, #316	; 0x13c
   0x40037ed4:	svc	0x00000000
   0x40037ed8:	pop	{r4, r7}
   0x40037edc:	movs	r0, r0
   0x40037ee0:	bxpl	lr