Yawning Angel 672fc9fc4d core/mem: Add zero_explicit ...

This call is intended to provide the ability to securely scrub memory
without compiler interference, in a similar manner to explicit_bzero,
memset_s, SecureZeroMemory.

The approach taken is a volatile memset followed by a seqentially
consistent memory fence, to prevent the call from being optimized away
by DSE, and from being reordered.  An identical approach is currently
being used by the zeroize Rust crate, and is effective in practice.

LLVM IR output:
```
; Function Attrs: nounwind
define internal i8* @mem.zero_explicit(i8* %0, i64 %1) #0 {
decls:
  call void @llvm.memset.p0i8.i64(i8* %0, i8 0, i64 %1, i1 true)
  fence seq_cst
  ret i8* %0
}
```

2021-10-31 22:57:13 +00:00

..

virtual

Remove nonsense from static_arena_init

2021-10-05 17:12:24 +01:00

alloc.odin

fix mem.new_clone

2021-09-19 22:19:06 +02:00

allocators.odin

Remove unneeded semicolons from the core library

2021-08-31 22:21:13 +01:00

mem.odin

core/mem: Add zero_explicit

2021-10-31 22:57:13 +00:00

raw.odin

mem.Raw_* alias runtime.Raw_*

2021-09-25 17:29:51 +01:00