Wt

I did install now gdb as Google told me that is "the" Debugger when using Linux and gcc/g:

apt-get update

apt-get install gdb

I found a short description how to use gcc/gdb: https://www.seas.upenn.edu/cets/answers/gcc.html

But currently i do not understand how i start my WT-App from commandline together with gdb?

My working commandline without gdb is this one (running from the Folder where i have my running app called wt_project.wt):

./wt_project.wt ---http-address=0.0.0.0 ---http-port=8099 ---docroot=. -c ../../../source/resources/wt_config.xml

But how must the command look when i start it together with gdb?

The following does not work:-(

gdb ./wt_project.wt ---http-address=0.0.0.0 ---http-port=8099 ---docroot=. -c ../../../source/resources/wt_config.xml

I get the error => gdb: unrecognized Option '---http-address=0.0.0.0'

Ah...i found it out how to run with gdb:-)

gdb ./wt_project.wt

after that you will get the gdb prompt:

(gdb) r ---http-address=0.0.0.0 ---http-port=8099 ---docroot=. -c ../../../source/resources/wt_config.xml

Now the WT-App is running:-)

But hey...how can i set a breakpoint now?

I just see the Messages given from the started wt-app that wt-server is inialized but the gdb prompt is not avaliable.

So how can i break the wt-app and set a breakpoint??

As described in the URL above before running the "r" command within the gdb prompt you have to set with the "b" command a breakpoint.

First:

(gdb) b main

Then:

(gdb) r ---http-address=0.0.0.0 ---http-port=8099 ---docroot=. -c ../../../source/resources/wt_config.xml

But this does not work, WT-App stops not on the breakpoint.

Is there more to do within the WT-App or is this the wrong way using gdb?

You've been a busy bee! I have not and do not recommend debugging in the docker container; they're not really for that. Of course, if it's working for you, no problem.

I use gdb (actually cgdb) to debug WT applications. You found out how to invoke (r --http-address=0.0.0.0 --http-port...), but you can do it in a more scriptable way with

gdb --args ./wt_project.wt --http-address=0.0.0.0 --http-port=8099...

b main doesn't sound right: you need to provide an unambiguous signature. gdb performs tab completion, maybe try b main<tab> to see if it will fill in the rest of your main function's signature? You can also provide b main.cpp:line_num. If you're wanting to step into main, try start?

Congratulations and good luck Claudio!

Thank you again and again and again Im At) The bee is already overheated...

Are you an Employee/Developer of EmWeb?

I did now as you instruct the following steps:

Start Point is the usr/local/src/dummy/build/debug/source Folder of my wt-app "wt_project.wt"

root:/# gdb ---args ./wt_project.wt ---http-address=0.0.0.0 ---http-port=8099 ---docroot=. -c ../../../source/resources/wt_config.xml

(gdb) b main.cpp:33 => Breakpoint is set message successfully on /usr/local/src/dummy/source/main.cpp, line 33.

(gdb) start

But same problem, it does not stop on the breakpoint set.

Do you have another idea what could help?

I'm not affiliated with redmine, emweb, nor WT in any way except as an enthusiastic user :-)

I think that should work. "start" automatically sets a breakpoint on the first line of the main function and runs to that line. b main.cpp:33 should also handle the breakpoint. That's really strange. When you compiled your ./wt_project.wt, were you sure to include debugging symbols? (-g to gcc or clang) I would think so because it says it set the breakpoint successfully, and lists your source file. I guess try issuing the breakpoint (b main.cpp:33) then just "run"? I'm not sure what else to suggest.

After "run" starting the program a message is coming up with the start params and a second line with a warning.

First line:

Starting program: /usr/local/src/dummy/build/Debug/source/wt_project.wt ---http-address=0.0.0.0 ---http-port=8099 ---docroot=. -c ../../../source/resources/wt_config.xml

Second line:

Error disabling address space randomization: Operation not permitted

Starting with the third message line, the printf outputs are shown from my app...but instead of them the breakpoint should stop here before the output.

I found out now with Google (searched for the warning message), that this is known Problem:

https://forums.docker.com/t/gdb-breakpoints-dont-work-error-disabling-address-space-randomization/14365

https://stackoverflow.com/questions/35860527/warning-error-disabling-address-space-randomization-operation-not-permitted#comment62818827_35860527

I will have a detail look to it and hopefully there will be a solution, so it seems all the instructions above was correctly:-)

As i have the solution i will post here.

Yes:-)

Adding

---security-opt seccomp=unconfined

to the docker run command and then your gdb instruction are working within the docker Container:-)

Once again, many thank for your Support!

Next i will try to work with Geany IDE and Debugging via setting up Geany...because now on commandline everything is working:-)