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debugger launch is slow (cygwin, gdb, C++) [message #724247]

Sun, 11 September 2011 14:10

Eclipse User

I have
$ gdb -v
GNU gdb 6.8.0.20080328-cvs (cygwin-special)

and eclipse helios
Helios Service Release 2
GDB Common 7.0.0.201102110609

My application I try to debug takes 8MB with debugging information.

Every time I try to launch the debugger I have to wait for several minutes. Why is it so?

Re: debugger launch is slow (cygwin, gdb, C++) [message #724370 is a reply to message #724247]

Mon, 12 September 2011 04:10

Eclipse User

I can debug from a command line with
gdb Debug/myprogram
really fast. Do I have to set some environment variables?

Re: debugger launch is slow (cygwin, gdb, C++) [message #724397 is a reply to message #724370]

Mon, 12 September 2011 05:26

Eclipse User

Debugging with eclipse will always be slower but several min wait to start is to much.Look at the gdb/mi console and you will see gdb working on something maybe you can find more info there.
There are lots of reason this could happen for example I had the same problem because eclipse was telling gdb to search for sources in my .svn folders and it took its time doing that.
One more reason for slow debugging can be a lot of output to console, but this is in the process of debugging not the start of debugging.

Re: debugger launch is slow (cygwin, gdb, C++) [message #724444 is a reply to message #724247]

Mon, 12 September 2011 07:33

Eclipse User

In the debug launch config open the Source tab and remove default lookup path. Then add "Absolute File Path".
I guess gdb needs so much time because Eclipse sends him all the possible source lookup paths.

Re: debugger launch is slow (cygwin, gdb, C++) [message #724515 is a reply to message #724444]

Mon, 12 September 2011 10:04

Eclipse User

I removed everything in the Source fane (Menu: Run-Debug Configuration) and added "Absolute File Path". Then it worked reasonable fast.
But then I had to add some "Path mappings" since my installation of Eclipse can't figure out to use /cygdrive/c/.. but requires C:\...
Here after it started to work slow again.

Re: debugger launch is slow (cygwin, gdb, C++) [message #724794 is a reply to message #724515]

Tue, 13 September 2011 03:37

Eclipse User

David wrote on Mon, 12 September 2011 16:04

I removed everything in the Source fane (Menu: Run-Debug Configuration) and added "Absolute File Path". Then it worked reasonable fast.
But then I had to add some "Path mappings" since my installation of Eclipse can't figure out to use /cygdrive/c/.. but requires C:\...
Here after it started to work slow again.

Can you update your Eclipse installation to Indigo? I am not sure but perhaps there are some bugfixed regarding this issue.

Re: debugger launch is slow (cygwin, gdb, C++) [message #725304 is a reply to message #724794]

Wed, 14 September 2011 09:30

Eclipse User

Under cygwin, I am aware of 2 causes of slowness. One is that CDT could try to resolve paths using cygwin utility cygpath. Every time it stumble to a file it may try to run that program, in many cases the resolved paths are not cached in memory. The second cause is that lookup in $PATH is noticeable slow, so it contributes to the first cause or any other lookup of external program. Try to use absolute paths where you can control that.

Andrew

Re: debugger launch is slow (cygwin, gdb, C++) [message #899516 is a reply to message #724247]

Wed, 01 August 2012 05:19

Eclipse User

Hello,
I am trying to debugg the CDT project in eclipse environment.
I am executing certain task at regular time interval(say 100ms).
Even though placing the breakpoint on the "task" ,it executes the tasks 20 times and then hits the breakpoint.
I am confused that why it is not recognising the breakpoint at starting itself.
Pls help me,i am new to eclipse.
Eclipse :Helioes
Debugger:GDB

Thanks in advance.

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