kiper220/mimalloc
1
0
Fork 0
mirror of https://github.com/microsoft/mimalloc.git synced 2025-07-01 09:14:38 +03:00
Code Issues Projects Releases Packages Wiki Activity Actions

improve handling of commit failure in arena allocation

Browse source
This commit is contained in:
Daan 2025-06-06 21:29:33 -07:00
parent d8b7456a1f
commit 6cfc8ad9d0
1 changed files with 14 additions and 13 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

11
src/arena.c
View file

@ -200,9 +200,11 @@ static mi_decl_noinline void* mi_arena_try_alloc_at(
// now actually commit
bool commit_zero = false;
if (!mi_arena_commit(arena, p, mi_size_of_slices(slice_count), &commit_zero, mi_size_of_slices(slice_count - already_committed_count))) {
memid->initially_committed = false;
// if the commit fails, we roll back
_mi_arenas_free( p, mi_size_of_slices(slice_count), *memid); // this will uncommit as well
return NULL;
}
else {
// committed
if (commit_zero) { memid->initially_zero = true; }
#if MI_DEBUG > 1
@ -214,7 +216,6 @@ static mi_decl_noinline void* mi_arena_try_alloc_at(
}
#endif
}
}
else {
// already fully committed.
_mi_os_reuse(p, mi_size_of_slices(slice_count));
@ -233,8 +234,7 @@ static mi_decl_noinline void* mi_arena_try_alloc_at(
}
}
else {
// no need to commit, but check if already fully committed
// commit requested, but the range may not be committed as a whole: ensure it is committed now
// no need to commit, but check if it is already fully committed
memid->initially_committed = mi_bitmap_is_setN(arena->slices_committed, slice_index, slice_count);
if (!memid->initially_committed) {
// partly committed.. adjust stats
@ -247,6 +247,7 @@ static mi_decl_noinline void* mi_arena_try_alloc_at(
mi_assert_internal(mi_bbitmap_is_clearN(arena->slices_free, slice_index, slice_count));
if (commit) { mi_assert_internal(mi_bitmap_is_setN(arena->slices_committed, slice_index, slice_count)); }
if (commit) { mi_assert_internal(memid->initially_committed); }
mi_assert_internal(mi_bitmap_is_setN(arena->slices_dirty, slice_index, slice_count));
return p;