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Fix memory error during precompilation #44345

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merged 2 commits into from
Mar 3, 2022
Merged

Fix memory error during precompilation #44345

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cfe0c84
Pre-allocate htables when serializing external methodinstances
timholy Feb 25, 2022
fc57ef7
fix memory error
timholy Mar 2, 2022
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5 changes: 3 additions & 2 deletions src/dump.c
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Original file line number Diff line number Diff line change
Expand Up @@ -272,6 +272,7 @@ static int has_backedge_to_worklist(jl_method_instance_t *mi, htable_t *visited)
for (i = 0; i < n; i++) {
jl_method_instance_t *be = (jl_method_instance_t*)jl_array_ptr_ref(mi->backedges, i);
if (has_backedge_to_worklist(be, visited)) {
bp = ptrhash_bp(visited, mi); // re-acquire since rehashing might change the location
*bp = (void*)((char*)HT_NOTFOUND + 2); // found
return 1;
}
Expand All @@ -286,10 +287,10 @@ static size_t queue_external_mis(jl_array_t *list)
{
size_t i, n = 0;
htable_t visited;
htable_new(&visited, 0);
if (list) {
assert(jl_is_array(list));
size_t n0 = jl_array_len(list);
htable_new(&visited, n0);
Comment on lines -289 to +293
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The htable_free below now access uninitialized memory and must be moved also

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Thanks! Fixed in #44446

for (i = 0; i < n0; i++) {
jl_method_instance_t *mi = (jl_method_instance_t*)jl_array_ptr_ref(list, i);
assert(jl_is_method_instance(mi));
Expand Down Expand Up @@ -2640,7 +2641,7 @@ JL_DLLEXPORT int jl_save_incremental(const char *fname, jl_array_t *worklist)
arraylist_new(&reinit_list, 0);
htable_new(&edges_map, 0);
htable_new(&backref_table, 5000);
htable_new(&external_mis, 0);
htable_new(&external_mis, newly_inferred ? jl_array_len(newly_inferred) : 0);
ptrhash_put(&backref_table, jl_main_module, (char*)HT_NOTFOUND + 1);
backref_table_numel = 1;
jl_idtable_type = jl_base_module ? jl_get_global(jl_base_module, jl_symbol("IdDict")) : NULL;
Expand Down