[Mono-dev] Debugging Memory mono images

Martin Baulig martin at ximian.com
Sat Jun 27 12:58:14 EDT 2009

On Thu, 2009-06-25 at 14:31 +0200, jonas echterhoff wrote:
> So, I got the debugger working so far that we can debug Unity on the  
> Mac. However, there's one issue I'm wondering about:
> In Unity, we load mono images from memory, and not from a file on  
> disk. So, we use mono_image_open_from_data_full(), instead of  
> mono_image_open_full(). This gives me an error in the debugger,  
> because it cannot find the symbol files:
> Cannot load symbol file `data-0x1a670000'
> We do use mono_debug_open_image_from_memory() to associate the symbol  
> data with the image, but either that is ignored by the debugger, or it  
> is too late, because it's after the mono_image_open_from_data_full()  
> call.
> Any idea how this is best fixed?

Hi Jonas,

If I remember correctly, this mono_debug_open_image_from_memory()
function was requested by someone who wanted to embed Mono a long time
ago, but I don't remember ever getting any feedback about it or anyone
actually using it.

We should now, that we have an actual customer for it, look at properly
testing fixing the implementation.


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