20 Oct
2023
20 Oct
'23
1:38 a.m.
This seems to be the place of this flag on Windows. I am attaching the test here which suggests that this is the place for the flag. I am not including is in MR as afraid it may be flaky (although currently succeeded on all the testbot machines), as many factors may affect if the block actually ends up LFH or not.
The motivation under doing this is that it should help "Binding of Isaac: Rebirth" to avoid random crashes, by making `*(int *)((int *)allocated_ptr_of_size_4 - 1)` negative, which, due to some checks on the value, avoids further (potentially fatal) out of bound memory access.
[lfh_flag_test.patch](/uploads/0048642b107783f5758320e06cd3d629/lfh_flag_test.patch)