[Bug 1873] Not enough workspace reserved with RTEMS Debug enabled.

[bugzilla-daemon at rtems.org]

https://www.rtems.org/bugzilla/show_bug.cgi?id=1873

--- Comment #8 from Sebastian Huber <sebastian.huber at embedded-brains.de> 2011-08-04 01:25:19 CDT ---
(In reply to comment #6)
> On the heap protection overhead, I have another bit of information.  Changing
> the _Configure_From_workspace() macro to use HEAP_BLOCK_HEADER_SIZE which also
> accounts for heap protection overhead did not fix it.  I then added 4 to the
> formula so an extra 4 bytes is reserved per allocation and hello runs.
> 
> #define _Configure_From_workspace(_size) \
>   (ssize_t)((_size) + HEAP_BLOCK_HEADER_SIZE + CPU_ALIGNMENT + 4)
> 
> Maybe I am missing an alignment factor thrown in when heap protection is turned
> on.  Is there an alignment for the block itself and then for ending protection
> area?

>From my point of view this should be sufficient:

(_size) + HEAP_BLOCK_HEADER_SIZE + CPU_ALIGNMENT - 1

The extra +4 is a miracle to me currently.

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