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Fix GC rooting during rehashing of iddict #52569

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merged 2 commits into from
Dec 18, 2023
Merged

Fix GC rooting during rehashing of iddict #52569

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37c1f14
Fix rooting when rehashing iddict
Zentrik Dec 17, 2023
2967fed
Remove old comment about inserting gc write barrier
Zentrik Dec 17, 2023
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5 changes: 2 additions & 3 deletions src/iddict.c
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Original file line number Diff line number Diff line change
Expand Up @@ -15,15 +15,14 @@ JL_DLLEXPORT jl_genericmemory_t *jl_idtable_rehash(jl_genericmemory_t *a, size_t
size_t sz = a->length;
size_t i;
jl_value_t **ol = (jl_value_t **) a->ptr;
jl_genericmemory_t *newa = jl_alloc_memory_any(newsz);
jl_genericmemory_t *newa = NULL;
// keep the original memory in the original slot since we need `ol`
// to be valid in the loop below.
JL_GC_PUSH2(&newa, &a);
newa = jl_alloc_memory_any(newsz);
for (i = 0; i < sz; i += 2) {
if (ol[i + 1] != NULL) {
jl_table_assign_bp(&newa, ol[i], ol[i + 1]);
// it is however necessary here because allocation
// can (and will) occur in a recursive call inside table_lookup_bp
}
}
JL_GC_POP();
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