Created attachment 138436 [details]
GDB log

I'm trying to debug C/C++ application on remote host (QNX). SSH access managed correctly (root access without password and option -J-Dcnd.remote.scp=true). The main reason I can see is wrong Process ID in "Sessions" tab.

http://s17.postimg.org/rs9b04ecf/screen.png

Also when I try to "Main menu > Debug > Attach Debugger > Using Gdb Debugger > Host: root@qnx:22" NetBeans fails with message "ps failed, see log for details". Details from log:

FINEST [nativeexecution.support.logger]: [15895 ms.] root@qnx /usr/bin/ps -fu root [0]: State changed: INITIAL -> STARTING
FINEST [nativeexecution.support.logger]: [16061 ms.] root@qnx /usr/bin/ps -fu root [2580528]: State changed: STARTING -> RUNNING
FINEST [nativeexecution.support.logger]: [16461 ms.] root@qnx /usr/bin/ps -fu root [2580528]: State changed: RUNNING -> FINISHING
FINEST [nativeexecution.support.logger]: [16462 ms.] root@qnx /usr/bin/ps -fu root [2580528]: State changed: FINISHING -> FINISHED
WARNING [org.netbeans.modules.cnd.debugger.common2.utils.PsProvider]: ps command failed with 127

First of all NetBeans tries to call /usr/bin/ps which is not correct path on my QNX system. Correct path is /bin/ps. But this is not a big problem to make symlink from /bin/ps to /usr/bin/ps what I did. After this manipulation log changed a little bit:

FINEST [nativeexecution.support.logger]: [301990 ms.] root@qnx /usr/bin/ps -fu root [0]: State changed: INITIAL -> STARTING
FINEST [nativeexecution.support.logger]: [302053 ms.] root@qnx /usr/bin/ps -fu root [2900009]: State changed: STARTING -> RUNNING
FINEST [nativeexecution.support.logger]: [302253 ms.] root@qnx /usr/bin/ps -fu root [2900009]: State changed: RUNNING -> FINISHING
FINEST [nativeexecution.support.logger]: [302254 ms.] root@qnx /usr/bin/ps -fu root [2900009]: State changed: FINISHING -> FINISHED
WARNING [org.netbeans.modules.cnd.debugger.common2.utils.PsProvider]: ps command failed with 255

Cause of this issue I was found too. ps version on my QNX system can only accept user's id but not user's login (looks like it's a QNX bug because ps help tells that "-u usrlist      Write information for processes whose user ID or login"). No matter. I wrote a simple wrapper for ps to replace "-fu root" arguments to "-fu 0". Finally I get next messages in the log:

FINEST [nativeexecution.support.logger]: [18107 ms.] root@qnx /usr/bin/ps -fu root [0]: State changed: INITIAL -> STARTING
FINEST [nativeexecution.support.logger]: [18260 ms.] root@qnx /usr/bin/ps -fu root [3285040]: State changed: STARTING -> RUNNING
FINEST [nativeexecution.support.logger]: [21261 ms.] root@qnx /usr/bin/ps -fu root [3285040]: State changed: RUNNING -> FINISHING
FINEST [nativeexecution.support.logger]: [21262 ms.] root@qnx /usr/bin/ps -fu root [3285040]: State changed: FINISHING -> FINISHED
java.lang.AssertionError: Process list:[[0, 1, 0, Aug08, /bin/sh: <stdin>[7]: /usr/bin/pargs: not found], [0, 1, 0, Aug08, /bin/sh: <stdin>[7]: /usr/bin/pargs: not found], [0, 1, 0, Aug08, /bin/sh: <stdin>[7]: /usr/bin/pargs: not found], [0, 1, 0, Aug08, /bin/sh: <stdin>[7]: /usr/bin/pargs: not found], [0, 1, 0, Aug08, /bin/sh: <stdin>[7]: /usr/bin/pargs: not found], [0, 1, 0, Aug08, /bin/sh: <stdin>[7]: /usr/bin/pargs: not found], [0, 1, 0, Aug08, /bin/sh: <stdin>[7]: /usr/bin/pargs: not found], [0, 1, 0, Aug08, /bin/sh: <stdin>[7]: /usr/bin/pargs: not found], [0, 1, 0, Aug08, /bin/sh: <stdin>[7]: /usr/bin/pargs: not found], [0, 2, 1, Aug08, /sbin/tinit -p], [0, 3, 2, Aug08, slogger -s32], [0, 12292, 2, Aug08, mqueue], [0, 5, 2, Aug08, pci-bios], [0, 6, 2, Aug08, devb-eide blk auto=partition dos exe=all cam quiet], [0, 6, 2, Aug08, devb-eide blk auto=partition dos exe=all cam quiet], [0, 6, 2, Aug08, devb-eide blk auto=partition dos exe=all cam quiet], [0, 6, 2, Aug08, devb-eide blk auto=partition dos exe=all cam quiet], [0, 6, 2, Aug08, devb-eide blk auto=partition dos exe=all cam quiet], [0, 6, 2, Aug08, devb-eide blk auto=partition dos exe=all cam quiet], [0, 6, 2, Aug08, devb-eide blk auto=partition dos exe=all cam quiet], [0, 6, 2, Aug08, devb-eide blk auto=partition dos exe=all cam quiet], [0, 7, 2, Aug08, devc-con -n4], [0, 4104, 2, Aug08, pipe], [0, 4104, 2, Aug08, pipe], [0, 4104, 2, Aug08, pipe], [0, 4104, 2, Aug08, pipe], [0, 159753, 2, Aug08, devc-pty -n 32], [0, 122890, 1, Aug08, devb-fdc cam quiet blk auto=partition,cache=100k], [0, 69643, 1, Aug08, io-audio], [0, 69643, 1, Aug08, io-audio], [0, 69643, 1, Aug08, io-audio], [0, 69643, 1, Aug08, io-audio], [0, 69643, 1, Aug08, io-audio], [0, 122892, 1, Aug08, devc-ser8250 -u1 3f8,4 -u2 2f8,3], [0, 163853, 2, Aug08, random -t], [0, 163853, 2, Aug08, random -t], [0, 163853, 2, Aug08, random -t], [0, 86030, 1, Aug08, io-net -ptcpip], [0, 86030, 1, Aug08, io-net -ptcpip], [0, 86030, 1, Aug08, io-net -ptcpip], [0, 86030, 1, Aug08, io-net -ptcpip], [0, 86030, 1, Aug08, io-net -ptcpip], [0, 86030, 1, Aug08, io-net -ptcpip], [0, 86030, 1, Aug08, io-net -ptcpip], [0, 86030, 1, Aug08, io-net -ptcpip], [0, 86030, 1, Aug08, io-net -ptcpip], [0, 176143, 2, Aug08, dumper -d /var/dumps], [0, 204816, 2, Aug08, fs-nfs3 host:/var/nfs /tmp/nfs], [0, 204816, 2, Aug08, fs-nfs3 host:/var/nfs /tmp/nfs], [0, 204816, 2, Aug08, fs-nfs3 host:/var/nfs /tmp/nfs], [0, 204816, 2, Aug08, fs-nfs3 host:/var/nfs /tmp/nfs], [0, 204816, 2, Aug08, fs-nfs3 host:/var/nfs /tmp/nfs], [0, 217105, 2, Aug08, qconn], [0, 217105, 2, Aug08, qconn], [0, 217105, 2, Aug08, qconn], [0, 217105, 2, Aug08, qconn], [0, 213010, 1, Aug08, inetd], [0, 356371, 2, Aug08, login], [0, 233492, 1, Aug08, /opt/sbin/sshd], [0, 241685, 1, Aug08, io-usb], [0, 241685, 1, Aug08, io-usb], [0, 241685, 1, Aug08, io-usb], [0, 241685, 1, Aug08, io-usb], [0, 241685, 1, Aug08, io-usb], [0, 241685, 1, Aug08, io-usb], [0, 241685, 1, Aug08, io-usb], [0, 356374, 2, Aug08, login], [0, 356375, 2, Aug08, login], [0, 503832, 2, Aug08, login], [0, 503833, 233492, Aug08, /opt/sbin/sshd], [0, 401434, 1, Aug08, Photon -g -lphlogin2 "-Sphshutdown -l"], [0, 430107, 1, Aug08, phfont -d /usr/photon/font_repository], [0, 430107, 1, Aug08, phfont -d /usr/photon/font_repository], [0, 442396, 1, Aug08, fontsleuth -d /usr/photon/font_repository], [0, 442396, 1, Aug08, fontsleuth -d /usr/photon/font_repository], [0, 442396, 1, Aug08, fontsleuth -d /usr/photon/font_repository], [0, 442396, 1, Aug08, fontsleuth -d /usr/photon/font_repository], [0, 503837, 503833, Aug08, -sh], [0, 1576990, 1503276, Aug08, helpviewer], [0, 471071, 1, Aug08, io-graphics -dvesabios vid=0x15ad -pphoton hwcursor], [0, 471071, 1, Aug08, io-graphics -dvesabios vid=0x15ad -pphoton hwcursor], [0, 471071, 1, Aug08, io-graphics -dvesabios vid=0x15ad -pphoton hwcursor], [0, 491552, 1, Aug08, /usr/photon/bin/devi-hirun kbd fd -d/dev/kbd ps2 mousedev], [0, 491552, 1, Aug08, /usr/photon/bin/devi-hirun kbd fd -d/dev/kbd ps2 mousedev], [0, 491552, 1, Aug08, /usr/photon/bin/devi-hirun kbd fd -d/dev/kbd ps2 mousedev], [0, 2998305, 233492, Aug08, /opt/sbin/sshd], [0, 3211298, 2998305, Aug08, sh -c sh], [0, 3301411, 3285040, Aug08, /bin/ps -fu 0], [0, 1327140, 1, Aug08, sh -c sh], [0, 3215397, 3211298, Aug08, /opt/libexec/sftp-server], [0, 1331238, 1, Aug08, sh -c sh], [0, 1331239, 1327140, Aug08, /bin/sh /bin/sh], [0, 1339432, 1331238, Aug08, cat /var/tmp/dlight_root/71159f3b/debuggerFifo1282086.fifo], [0, 1577002, 1576990, Aug08, vserver.file], [0, 1458219, 1, Aug08, pwm], [0, 1503276, 1, Aug08, shelf], [0, 1503276, 1, Aug08, shelf], [0, 1540141, 1, Aug08, bkgdmgr], [0, 1540142, 1, Aug08, wmswitch], [0, 1540143, 1, Aug08, saver], [0, 3285040, 3276849, Aug08, /bin/sh /usr/bin/ps -fu root], [0, 3276849, 2998305, Aug08, sh -c sh]]

God damn! /usr/bin/pargs: not found 
After digging in netbeans sources I was found roots of this problem in PsProvider class. Netbeans can't properly detect OS Family of host (remote host I suppose) and runs default algorithm for Solaris! As a workaround I'm using now "-J-Dattach.pargs.disable=true" to disable pargs. But I'm not sure that this is the right way. I hope it will help to solve problem with GDB.

Best regards.