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fix mem stats for MEM_USE_POOLS==1

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This commit is contained in:
sg 2016-07-25 22:08:32 +02:00
parent 4f5ff37c5d
commit 00598b0b46
2 changed files with 12 additions and 7 deletions
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11
src/core/mem.c
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@ -117,9 +117,13 @@ again:
/* and return a pointer to the memory directly after the struct memp_malloc_helper */
ret = (u8_t*)element + LWIP_MEM_ALIGN_SIZE(sizeof(struct memp_malloc_helper));
#if MEMP_OVERFLOW_CHECK || (LWIP_STATS && MEM_STATS)
/* truncating to u16_t is safe because struct memp_desc::size is u16_t */
element->size = (u16_t)size;
MEM_STATS_INC_USED(used, element->size);
#endif /* MEMP_OVERFLOW_CHECK || (LWIP_STATS && MEM_STATS) */
#if MEMP_OVERFLOW_CHECK
/* initialize unused memory */
element->size = size;
/* initialize unused memory (diff between requested size and selected pool's size) */
memset((u8_t*)ret + size, 0xcd, memp_pools[poolnr]->size - size);
#endif /* MEMP_OVERFLOW_CHECK */
return ret;
@ -148,12 +152,13 @@ mem_free(void *rmem)
LWIP_ASSERT("hmem == MEM_ALIGN(hmem)", (hmem == LWIP_MEM_ALIGN(hmem)));
LWIP_ASSERT("hmem->poolnr < MEMP_MAX", (hmem->poolnr < MEMP_MAX));
MEM_STATS_DEC_USED(used, hmem->size);
#if MEMP_OVERFLOW_CHECK
{
u16_t i;
LWIP_ASSERT("MEM_USE_POOLS: invalid chunk size",
hmem->size <= memp_pools[hmem->poolnr]->size);
/* check that unused memory remained untouched */
/* check that unused memory remained untouched (diff between requested size and selected pool's size) */
for (i = hmem->size; i < memp_pools[hmem->poolnr]->size; i++) {
u8_t data = *((u8_t*)rmem + i);
LWIP_ASSERT("MEM_USE_POOLS: mem overflow detected", data == 0xcd);

8
src/include/lwip/memp.h
View File

@ -113,15 +113,15 @@ extern const struct memp_desc* const memp_pools[MEMP_MAX];
#define LWIP_MEMPOOL_FREE(name, x) memp_free_pool(&memp_ ## name, (x))
#if MEM_USE_POOLS
/** This structure is used to save the pool one element came from. */
/** This structure is used to save the pool one element came from.
* This has to be defined here as it is required for pool size calculation. */
struct memp_malloc_helper
{
memp_t poolnr;
#if MEMP_OVERFLOW_CHECK
#if MEMP_OVERFLOW_CHECK || (LWIP_STATS && MEM_STATS)
u16_t size;
#endif /* MEMP_OVERFLOW_CHECK */
#endif /* MEMP_OVERFLOW_CHECK || (LWIP_STATS && MEM_STATS) */
};
#endif /* MEM_USE_POOLS */
void memp_init(void);