bjoernager/rust
bjoernager/rust
1
Fork 0
Code Activity

Rollup merge of #91675 - ivanloz:memtagsan, r=nagisa

Browse source 
Add MemTagSanitizer Support

Add support for the LLVM [MemTagSanitizer](https://llvm.org/docs/MemTagSanitizer.html).

On hardware which supports it (see caveats below), the MemTagSanitizer can catch bugs similar to AddressSanitizer and HardwareAddressSanitizer, but with lower overhead.

On a tag mismatch, a SIGSEGV is signaled with code SEGV_MTESERR / SEGV_MTEAERR.

# Usage

`-Zsanitizer=memtag -C target-feature="+mte"`

# Comments/Caveats

* MemTagSanitizer is only supported on AArch64 targets with hardware support
* Requires `-C target-feature="+mte"`
* LLVM MemTagSanitizer currently only performs stack tagging.

# TODO

* Tests
* Example
This commit is contained in:
Matthias Krüger 2022-02-18 23:23:03 +01:00 • committed by GitHub
commit 0bb72a2c66
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
15 changed files with 67 additions and 6 deletions
Download patch file Download diff file Expand all files Collapse all files

3
compiler/rustc_session/src/options.rs
View file

@ -376,7 +376,7 @@ mod desc {
pub const parse_panic_strategy: &str = "either `unwind` or `abort`";
pub const parse_opt_panic_strategy: &str = parse_panic_strategy;
pub const parse_relro_level: &str = "one of: `full`, `partial`, or `off`";
pub const parse_sanitizers: &str = "comma separated list of sanitizers: `address`, `cfi`, `hwaddress`, `leak`, `memory` or `thread`";
pub const parse_sanitizers: &str = "comma separated list of sanitizers: `address`, `cfi`, `hwaddress`, `leak`, `memory`, `memtag`, or `thread`";
pub const parse_sanitizer_memory_track_origins: &str = "0, 1, or 2";
pub const parse_cfguard: &str =
"either a boolean (`yes`, `no`, `on`, `off`, etc), `checks`, or `nochecks`";
@ -639,6 +639,7 @@ mod parse {
"cfi" => SanitizerSet::CFI,
"leak" => SanitizerSet::LEAK,
"memory" => SanitizerSet::MEMORY,
"memtag" => SanitizerSet::MEMTAG,
"thread" => SanitizerSet::THREAD,
"hwaddress" => SanitizerSet::HWADDRESS,
_ => return false,