Re: STORAGE_ERROR : EXCEPTION_STACK_OVERFLOW

["Alex R. Mosteo" <devnull@mailinator.com>]

Robert C. Leif wrote:
>    I am creating software in Ada to visualize images obtained with a
> fluorescence microscope. Unfortunately, when I switch my images from having
> 16 bit pixels to 32 bit pixels, I raise the exception STORAGE_ERROR :
> EXCEPTION_STACK_OVERFLOW.
>    I am using GNAT 3.15p.
>    The Users Guide to Windows states: "5.3 Setting Stack Size from gnatlink 
>    It is possible to specify the program stack size from gnatlink. Assuming
> that the underlying linker is GNU ld there is two ways to do so: 
>    using -Xlinker linker option 
>      $ gnatlink hello -Xlinker --stack=0x10000,0x1000
>    This set the stack reserve size to 0x10000 bytes and the stack commit
> size to 0x1000 bytes. 
>    using -Wl linker option 
>      $ gnatlink hello -Wl,--stack=0x1000000
>    This set the stack reserve size to 0x1000000 bytes. Note that with -Wl
> option it is not possible to set the stack commit size because the coma is a
> separator for this option."
>    My project file includes:
>    
>    package Linker is
>       for Default_Switches ("ada") use ("-g", "-Xlinker
> stack=0x10000000,0x10000000");
>       end Linker;
>    
>    Even with a 10 megabyte stack, I still get Stack_Overflow.
>    Any suggestions would be greatly appreciated.  I believe that I know how
> to put the array on the heap using an access type.  However, I greatly
> prefer working with objects that are on the stack and omitting pointers from
> my code.

You need to additionally use the pragma Storage_Size (...) in the tasks 
at risk. If it's the main task, you may need to move everything to a 
dummy task.

I have had success using this format: --Xlinker --stack=4000000,4000000