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-rw-r--r--erts/emulator/beam/erl_alloc_util.c15
1 files changed, 8 insertions, 7 deletions
diff --git a/erts/emulator/beam/erl_alloc_util.c b/erts/emulator/beam/erl_alloc_util.c
index ac7f420708..510b1b47e1 100644
--- a/erts/emulator/beam/erl_alloc_util.c
+++ b/erts/emulator/beam/erl_alloc_util.c
@@ -878,8 +878,10 @@ erts_alcu_fix_alloc_shrink(Allctr_t *allctr, erts_aint32_t flgs)
#ifdef ERTS_SMP
-#define ERTS_ALCU_DD_FIX_TYPE_OFFS \
- ((sizeof(ErtsAllctrDDBlock_t)-1)/sizeof(UWord) + 1)
+typedef struct {
+ ErtsAllctrDDBlock_t ddblock__; /* must be first */
+ ErtsAlcType_t fix_type;
+}ErtsAllctrFixDDBlock_t;
static ERTS_INLINE Allctr_t*
@@ -1180,7 +1182,7 @@ handle_delayed_dealloc(Allctr_t *allctr,
if (fix) {
ErtsAlcType_t type;
- type = (ErtsAlcType_t) ((UWord *) ptr)[ERTS_ALCU_DD_FIX_TYPE_OFFS];
+ type = ((ErtsAllctrFixDDBlock_t*) ptr)->fix_type;
ix = type - ERTS_ALC_N_MIN_A_FIXED_SIZE;
ERTS_DBG_CHK_FIX_LIST(allctr, fix, ix, 1);
fix[ix].used--;
@@ -1242,7 +1244,7 @@ enqueue_dealloc_other_instance(ErtsAlcType_t type,
int cinit)
{
if (allctr->fix)
- ((UWord *) ptr)[ERTS_ALCU_DD_FIX_TYPE_OFFS] = (UWord) type;
+ ((ErtsAllctrFixDDBlock_t*) ptr)->fix_type = type;
if (ddq_enqueue(type, &allctr->dd.q, ptr, cinit))
erts_alloc_notify_delayed_dealloc(allctr->ix);
@@ -4198,9 +4200,8 @@ erts_alcu_start(Allctr_t *allctr, AllctrInit_t *init)
#if ERTS_SMP
if (init->tpref) {
Uint sz = ABLK_HDR_SZ;
- sz += ERTS_ALCU_DD_FIX_TYPE_OFFS*sizeof(UWord);
- if (init->fix)
- sz += sizeof(UWord);
+ sz += (init->fix ?
+ sizeof(ErtsAllctrFixDDBlock_t) : sizeof(ErtsAllctrDDBlock_t));
sz = UNIT_CEILING(sz);
if (sz > allctr->min_block_size)
allctr->min_block_size = sz;