AuroraMiddleware/mimalloc
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

Merge pull request #297 from Shivam7-1/patch-2

Browse Source 
Updated readme.md
This commit is contained in:
Daan 2020-09-14 09:13:20 -07:00 committed by GitHub
commit 5cd5423108
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 4 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
readme.md
View File

@ -223,7 +223,7 @@ completely and redirect all calls to the _mimalloc_ library instead .
## Environment Options ## Environment Options
You can set further options either programmatically (using [`mi_option_set`](https://microsoft.github.io/mimalloc/group__options.html)), You can set further options either programmatically (using [`mi_option_set`](https://microsoft.github.io/mimalloc/group__options.html)),
or via environment variables. or via environment variables:
- `MIMALLOC_SHOW_STATS=1`: show statistics when the program terminates. - `MIMALLOC_SHOW_STATS=1`: show statistics when the program terminates.
- `MIMALLOC_VERBOSE=1`: show verbose messages. - `MIMALLOC_VERBOSE=1`: show verbose messages.
@ -273,11 +273,11 @@ _mimalloc_ can be build in secure mode by using the `-DMI_SECURE=ON` flags in `c
to make mimalloc more robust against exploits. In particular: to make mimalloc more robust against exploits. In particular:
- All internal mimalloc pages are surrounded by guard pages and the heap metadata is behind a guard page as well (so a buffer overflow - All internal mimalloc pages are surrounded by guard pages and the heap metadata is behind a guard page as well (so a buffer overflow
exploit cannot reach into the metadata), exploit cannot reach into the metadata).
- All free list pointers are - All free list pointers are
[encoded](https://github.com/microsoft/mimalloc/blob/783e3377f79ee82af43a0793910a9f2d01ac7863/include/mimalloc-internal.h#L396) [encoded](https://github.com/microsoft/mimalloc/blob/783e3377f79ee82af43a0793910a9f2d01ac7863/include/mimalloc-internal.h#L396)
with per-page keys which is used both to prevent overwrites with a known pointer, as well as to detect heap corruption, with per-page keys which is used both to prevent overwrites with a known pointer, as well as to detect heap corruption.
- Double free's are detected (and ignored), - Double free's are detected (and ignored).
- The free lists are initialized in a random order and allocation randomly chooses between extension and reuse within a page to - The free lists are initialized in a random order and allocation randomly chooses between extension and reuse within a page to
mitigate against attacks that rely on a predicable allocation order. Similarly, the larger heap blocks allocated by mimalloc mitigate against attacks that rely on a predicable allocation order. Similarly, the larger heap blocks allocated by mimalloc
from the OS are also address randomized. from the OS are also address randomized.