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

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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
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15 changed files with 67 additions and 6 deletions
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2
src/tools/compiletest/src/header.rs
View file

@ -863,6 +863,7 @@ pub fn make_test_description<R: Read>(
let has_msan = util::MSAN_SUPPORTED_TARGETS.contains(&&*config.target);
let has_tsan = util::TSAN_SUPPORTED_TARGETS.contains(&&*config.target);
let has_hwasan = util::HWASAN_SUPPORTED_TARGETS.contains(&&*config.target);
let has_memtag = util::MEMTAG_SUPPORTED_TARGETS.contains(&&*config.target);
// for `-Z gcc-ld=lld`
let has_rust_lld = config
.compile_lib_path
@ -899,6 +900,7 @@ pub fn make_test_description<R: Read>(
ignore |= !has_msan && config.parse_name_directive(ln, "needs-sanitizer-memory");
ignore |= !has_tsan && config.parse_name_directive(ln, "needs-sanitizer-thread");
ignore |= !has_hwasan && config.parse_name_directive(ln, "needs-sanitizer-hwaddress");
ignore |= !has_memtag && config.parse_name_directive(ln, "needs-sanitizer-memtag");
ignore |= config.target_panic == PanicStrategy::Abort
&& config.parse_name_directive(ln, "needs-unwind");
ignore |= config.target == "wasm32-unknown-unknown" && config.parse_check_run_results(ln);

3
src/tools/compiletest/src/util.rs
View file

@ -117,6 +117,9 @@ pub const TSAN_SUPPORTED_TARGETS: &[&str] = &[
pub const HWASAN_SUPPORTED_TARGETS: &[&str] =
&["aarch64-linux-android", "aarch64-unknown-linux-gnu"];
pub const MEMTAG_SUPPORTED_TARGETS: &[&str] =
&["aarch64-linux-android", "aarch64-unknown-linux-gnu"];
const BIG_ENDIAN: &[&str] = &[
"aarch64_be",
"armebv7r",