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Add debug tracing capability to isc_mempool_create/destroy

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Previously, we only had capability to trace the mempool gets and puts,
but for debugging, it's sometimes also important to keep track how many
and where do the memory pools get created and destroyed.  This commit
adds such tracking capability.
This commit is contained in:
Ondřej Surý
2021-05-11 19:54:05 +02:00
parent 5ab05d1696
commit fd3ceec475
2 changed files with 24 additions and 4 deletions
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8
lib/isc/include/isc/mem.h
View File

@@ -361,8 +361,11 @@ isc_mem_renderjson(void *memobj0);
* Memory pools
*/
#define isc_mempool_create(c, s, mp) \
isc__mempool_create((c), (s), (mp)_ISC_MEM_FILELINE)
void
isc_mempool_create(isc_mem_t *mctx, size_t size, isc_mempool_t **mpctxp);
isc__mempool_create(isc_mem_t *mctx, size_t size,
isc_mempool_t **mpctxp _ISC_MEM_FLARG);
/*%<
* Create a memory pool.
*
@@ -381,8 +384,9 @@ isc_mempool_create(isc_mem_t *mctx, size_t size, isc_mempool_t **mpctxp);
*\li #ISC_R_SUCCESS -- all is well.
*/
#define isc_mempool_destroy(mp) isc__mempool_destroy((mp)_ISC_MEM_FILELINE)
void
isc_mempool_destroy(isc_mempool_t **mpctxp);
isc__mempool_destroy(isc_mempool_t **mpctxp _ISC_MEM_FLARG);
/*%<
* Destroy a memory pool.
*

20
lib/isc/mem.c
View File

@@ -1084,7 +1084,8 @@ isc_mem_getname(isc_mem_t *ctx) {
*/
void
isc_mempool_create(isc_mem_t *mctx, size_t size, isc_mempool_t **mpctxp) {
isc__mempool_create(isc_mem_t *mctx, size_t size,
isc_mempool_t **mpctxp FLARG) {
REQUIRE(VALID_CONTEXT(mctx));
REQUIRE(size > 0U);
REQUIRE(mpctxp != NULL && *mpctxp == NULL);
@@ -1117,6 +1118,13 @@ isc_mempool_create(isc_mem_t *mctx, size_t size, isc_mempool_t **mpctxp) {
atomic_init(&mpctx->fillcount, 1);
atomic_init(&mpctx->gets, 0);
#if ISC_MEM_TRACKLINES
if ((isc_mem_debugging & ISC_MEM_DEBUGTRACE) != 0) {
fprintf(stderr, "create pool %p file %s line %u mctx %p\n",
mpctx, file, line, mctx);
}
#endif /* ISC_MEM_TRACKLINES */
*mpctxp = (isc_mempool_t *)mpctx;
MCTXLOCK(mctx);
@@ -1138,7 +1146,7 @@ isc_mempool_setname(isc_mempool_t *mpctx, const char *name) {
}
void
isc_mempool_destroy(isc_mempool_t **mpctxp) {
isc__mempool_destroy(isc_mempool_t **mpctxp FLARG) {
REQUIRE(mpctxp != NULL);
REQUIRE(VALID_MEMPOOL(*mpctxp));
@@ -1149,6 +1157,14 @@ isc_mempool_destroy(isc_mempool_t **mpctxp) {
mpctx = *mpctxp;
*mpctxp = NULL;
#if ISC_MEM_TRACKLINES
if ((isc_mem_debugging & ISC_MEM_DEBUGTRACE) != 0) {
fprintf(stderr, "destroy pool %p file %s line %u mctx %p\n",
mpctx, file, line, mctx);
}
#endif
if (atomic_load_acquire(&mpctx->allocated) > 0) {
UNEXPECTED_ERROR(__FILE__, __LINE__,
"isc_mempool_destroy(): mempool %s "