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Further detail compile-time options.

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security/hardened_malloc.adoc
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= GrapheneOS hardened_malloc = GrapheneOS hardened_malloc
Version: 0.1.0.11 Version: 0.1.0.12
This documentation contains instructions to use This documentation contains instructions to use
@ -37,9 +37,19 @@ no impact on the security properties of hardened_malloc.
* Minimum number of arenas: 1 * Minimum number of arenas: 1
* Maximum number of arenas: 256 * Maximum number of arenas: 256
For extra security, `CONFIG_SEAL_METADATA=true` can be used in order to control whether Memory
Protection Keys are used to disable access to all writable allocator state outside of the memory
allocator code. It's currently disabled by default due to a significant performance cost for this
use case on current generation hardware. Whether or not this feature is enabled, the metadata is all
contained within an isolated memory region with high entropy random guard regions around it.
For low-memory systems, `VARIANT=light` can be used to compile the light variant of hardened_malloc, For low-memory systems, `VARIANT=light` can be used to compile the light variant of hardened_malloc,
which sacrifices some security for much less memory usage. which sacrifices some security for much less memory usage.
For all compile-time options, see the
https://github.com/GrapheneOS/hardened_malloc#configuration[configuration section] of
hardened_malloc's extensive official documentation.
== Copy Compiled hardened_malloc Library == Copy Compiled hardened_malloc Library
`# cp out/libhardened_malloc.so <target_path>` `# cp out/libhardened_malloc.so <target_path>`