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User forums => Using Code::Blocks => Topic started by: babis on January 19, 2016, 12:13:12 am

Title: gdb, shared_ptr and code::blocks
Post by: babis on January 19, 2016, 12:13:12 am

Hi,

I'm using code::blocks 13.12 in Linux Mint.
I have both gdb 7.10.1 and 7.7.1, and I've downloaded the python code for pretty printing -- both exhibit the below problem.
Sometimes, when I'm trying to print a shared_ptr ( using either "print (*ptr.get())" or "print *ptr" or "print *ptr._M_ptr") I get no output; it just halts there and I have to kill gdb, sometimes code::blocks too. I've tried the same thing in Eclipse, but I didn't get such a problem. The structure that I'm trying to print (or equivalently, display in the watch window) is complex; several STL vectors and sets and maps and so on.

I created a test application with a shared_ptr of a very simple structure, and it works as expected.
If I print a variable within the structure, it also works ok.
I'm suspecting a "maximum size" of sorts, that I'm exceeding.

Anybody have any ideas?

Thanks.

Title: Re: gdb, shared_ptr and code::blocks
Post by: oBFusCATed on January 19, 2016, 12:20:03 am

If the vectors are containing lots of data then probably this is causing the problem.
At the moment nothing could be done as far as I know.

Title: Re: gdb, shared_ptr and code::blocks
Post by: babis on January 19, 2016, 12:41:36 am

Thanks! Quick and spot on :)

I'm pretty sure I've seen a post somewhere to add some line in the python code to clamp the displayed number of elements, but I've lost it now dammit...

Title: Re: gdb, shared_ptr and code::blocks
Post by: babis on January 19, 2016, 10:58:05 am

Ok, for reference, it's fixed by just setting a limit to how many elements shall be printed, for example using the below:

set print elements 100

in .gdbinit or the debugger initialization commands