Question

Urgent

Asked by: bhupendra_saini

Hi,
My code is in C++ on sun solaris server.
Code is in multi threaded.
what problem we are facing that it seems lik main thread hang somewhere.
So we just want to know is there any command in gdb or any other by which
we can see where that main thread is stuck or where it is right now.

bash-2.05$ ps -eaf|grep ipcl
   
     mca  5646  5643  0 12:11:01 pts/29   0:51 ./ipcl

ipcl is process name


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Asked On
2008-07-31 at 01:24:40ID23610194
Topic

C++ Programming Language

Participating Experts
2
Points
500
Comments
9

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Answers

 

by: Infinity08Posted on 2008-07-31 at 01:29:24ID: 22127835

where ;)

        gdb your_application
        (gdb) run

now wait until it is blocked, then :

        (gdb) where

 

by: sunnycoderPosted on 2008-07-31 at 01:46:09ID: 22127905

Hello bhupendra_saini,

>we can see where that main thread is stuck or where it is right now
launch gdb ... on gdb prompt, use attach command

attach <pid>
Where pid is the pid of your process.

Regards,
sunnycoder

 

by: bhupendra_sainiPosted on 2008-07-31 at 01:46:57ID: 22127908

hi
But is there any kind of command for checking the status of all thread when the programming is in running state.
Means just want to know what all threads are executing at that time

 

by: sunnycoderPosted on 2008-07-31 at 01:47:26ID: 22127911

this will get you access the stuck process .. then of course you run a bt or switch threads to examine their states and carry on debugging as you usually would.

 

by: sunnycoderPosted on 2008-07-31 at 01:48:44ID: 22127915

bhupendra_saini,

>Means just want to know what all threads are executing at that time
bt -> backtrace ... current threads call stack

info threads -> info about all threads

thread n -> switch to thread n ... n is the same id that you see as output of info threads command

sunnycoder

 

by: Infinity08Posted on 2008-07-31 at 01:54:14ID: 22127938

>> But is there any kind of command for checking the status of all thread when the programming is in running state.

As I said : 'where' will tell you where the thread is right now. Just switch threads if you want to know for different threads.

 

by: bhupendra_sainiPosted on 2008-07-31 at 04:57:26ID: 22128808

how can i find a machine is 32 bit or 64 bit?

 

by: Infinity08Posted on 2008-07-31 at 05:07:47ID: 22128852

uname -a

will show you the architecture (and other system information)

20120131-EE-VQP-002

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