ada - EXCEPTION_ACCESS_VIOLATION on a static declaration -


i new usage of for ***'address use ***. , wondering limitation of usage. created following procedure: 

procedure letshack (a : system.address)        my_string : string(1..100000);       my_string'address use a;    begin        put(my_string);    end;

and raise exception_access_violation while same code string 100 length don't raise it. more on if don't use integer address, code works properly.

so limitation of for ***'address use *** usage. ps : using ada 95 information welcome.

edit: understand part of behavior. , suppose. when start program stack allocated , can write , read in it. indeed wrote 5th byte integer address

real addresses |----------------------------| virtual addresses         0x48000|stack origine               |0x00                |                            |                |                            |                |                            |                |                            |                |end of stack                |   0x48000+range|----------------------------|0x00+range

and exception_access_violation if out of stack. seems strange "strong" language if right. because means can rewrite own stack , make bad behave.

if have ensured have allocated 100_000 consecutive characters in readable part of memory starting @ a, should work.

if a address of ada entity, not supposed work.


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