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Maximum slab size limited, debug mode errors fixed

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The maximum slab size is now 2^17 bytes (= 131072). If you request a slab size larger than this, you will get slab sizes of 131072 bytes instead.

Enabling the memory management debugging code no longer produces compiler errors.
This commit is contained in:
Olaf Barthel
2016-11-21 12:27:40 +01:00
parent 799ee705e8
commit 7e201fea06
19 changed files with 90 additions and 73 deletions
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12
library/stdlib_memory.h
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@ -200,7 +200,7 @@ struct MemoryTree
/* This keeps track of individual slabs. Each slab begins with this
* header and is followed by the memory it manages. The size of that
* memory "slab" is fixed and matches what is stored in
* SlabData.sd_MaxSlabSize.
* SlabData.sd_StandardSlabSize.
*
* Each slab manages allocations of a specific maximum size, e.g. 8, 16, 32,
* 64, etc. bytes. Multiple slabs can exist which manage allocations of the same
@ -245,13 +245,13 @@ struct SlabData
* which are 8 bytes in size, sd_Slabs[4] is for 16 byte
* chunks, etc. The minimum chunk size is 8, which is why
* lists 0..2 are not used. Currently, there is an upper limit
* of 2^31 bytes per chunk, but you should not be using slab
* of 2^17 bytes per chunk, but you should not be using slab
* chunks much larger than 4096 bytes.
*/
struct MinList sd_Slabs[31];
struct MinList sd_Slabs[17];
/* Memory allocations which are larger than the limit
* found in the sd_MaxSlabSize field are kept in this list.
* found in the sd_StandardSlabSize field are kept in this list.
* They are never associated with a slab.
*/
struct MinList sd_SingleAllocations;
@ -262,13 +262,13 @@ struct SlabData
*/
struct MinList sd_EmptySlabs;
/* This is the maximum size of a memory allocation which may
/* This is the standard size of a memory allocation which may
* be made from a slab that can accommodate it. This number
* is initialized from the __slab_max_size global variable,
* if > 0, and unless it already is a power of two, it will
* be rounded up to the next largest power of two.
*/
size_t sd_MaxSlabSize;
size_t sd_StandardSlabSize;
/* These fields kees track of how many entries there are in
* the sd_SingleAllocations list, and how much memory these