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*** HEAP WALK TEST ***
start with a system state != SYSTEM_STATE_UP
testing the _Heap_Walk_check_control() function
test what happens if page size = 0
set page size to a not CPU-aligned value
set minimal block size to a not page aligned value
set allocation area of the first block to be non page-aligned
clear the previous used flag of the first block
mark last block as free
set invalid next block for last block
testing the _Heap_Walk_check_free_list() function
no free blocks
create a loop in the free list
put a block outside the heap to the free list
put a block on the free list, which is not page-aligned
put a used block on the free list
Walk freshly initialized heap
Test the main loop
set the blocksize so, that the next block is outside the heap
walk a heap with blocks with different states of the previous-used flag
create a block with a not page aligned size
create a block with a size smaller than the min_block_size
make a block with a size, so that the block reaches into the next block
create a block with invalid successor
make a block with a size, so that it includes the next block
test the _Heap_Walk_check_free_block() function
set a previous size for the next block which is not equal to the size of the actual block
clear the previous_used flag of the first free block after an used block
take a free block out of the free list
test the output-function for the _Heap_Walk()
therefore use the (already tested) case with a page size of 0
PASS[0]: page size 0, min block size 16
area begin 0x0202D4BC, area end 0x0202E4BC
first block 0x0202D4C0, last block 0x0202E4B0
first free 0x0202D4C0, last free 0x0202D4C0
FAIL[0]: page size is zero
*** END OF HEAP WALK TEST ***
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