From 568aeda9e955ca2a4c043bc2ae7f854e60f6103a Mon Sep 17 00:00:00 2001
From: Ivan Lozano <ivanlozano@google.com>
Date: Fri, 3 Dec 2021 16:11:13 -0500
Subject: MemTagSanitizer Support

Adds support for the LLVM MemTagSanitizer.
---
 compiler/rustc_target/src/spec/aarch64_linux_android.rs     | 4 +++-
 compiler/rustc_target/src/spec/aarch64_unknown_linux_gnu.rs | 1 +
 compiler/rustc_target/src/spec/mod.rs                       | 4 ++++
 3 files changed, 8 insertions(+), 1 deletion(-)

(limited to 'compiler/rustc_target/src')

diff --git a/compiler/rustc_target/src/spec/aarch64_linux_android.rs b/compiler/rustc_target/src/spec/aarch64_linux_android.rs
index 1e9abbbe1e7..5692925f63b 100644
--- a/compiler/rustc_target/src/spec/aarch64_linux_android.rs
+++ b/compiler/rustc_target/src/spec/aarch64_linux_android.rs
@@ -14,7 +14,9 @@ pub fn target() -> Target {
             // As documented in https://developer.android.com/ndk/guides/cpu-features.html
             // the neon (ASIMD) and FP must exist on all android aarch64 targets.
             features: "+neon,+fp-armv8".to_string(),
-            supported_sanitizers: SanitizerSet::CFI | SanitizerSet::HWADDRESS,
+            supported_sanitizers: SanitizerSet::CFI
+                | SanitizerSet::HWADDRESS
+                | SanitizerSet::MEMTAG,
             ..super::android_base::opts()
         },
     }
diff --git a/compiler/rustc_target/src/spec/aarch64_unknown_linux_gnu.rs b/compiler/rustc_target/src/spec/aarch64_unknown_linux_gnu.rs
index 850381f7fb0..974a5b84d1d 100644
--- a/compiler/rustc_target/src/spec/aarch64_unknown_linux_gnu.rs
+++ b/compiler/rustc_target/src/spec/aarch64_unknown_linux_gnu.rs
@@ -14,6 +14,7 @@ pub fn target() -> Target {
                 | SanitizerSet::CFI
                 | SanitizerSet::LEAK
                 | SanitizerSet::MEMORY
+                | SanitizerSet::MEMTAG
                 | SanitizerSet::THREAD
                 | SanitizerSet::HWADDRESS,
             ..super::linux_gnu_base::opts()
diff --git a/compiler/rustc_target/src/spec/mod.rs b/compiler/rustc_target/src/spec/mod.rs
index d735f3d41fd..ed758710ecd 100644
--- a/compiler/rustc_target/src/spec/mod.rs
+++ b/compiler/rustc_target/src/spec/mod.rs
@@ -606,6 +606,7 @@ bitflags::bitflags! {
         const THREAD  = 1 << 3;
         const HWADDRESS = 1 << 4;
         const CFI     = 1 << 5;
+        const MEMTAG  = 1 << 6;
     }
 }
 
@@ -619,6 +620,7 @@ impl SanitizerSet {
             SanitizerSet::CFI => "cfi",
             SanitizerSet::LEAK => "leak",
             SanitizerSet::MEMORY => "memory",
+            SanitizerSet::MEMTAG => "memtag",
             SanitizerSet::THREAD => "thread",
             SanitizerSet::HWADDRESS => "hwaddress",
             _ => return None,
@@ -652,6 +654,7 @@ impl IntoIterator for SanitizerSet {
             SanitizerSet::CFI,
             SanitizerSet::LEAK,
             SanitizerSet::MEMORY,
+            SanitizerSet::MEMTAG,
             SanitizerSet::THREAD,
             SanitizerSet::HWADDRESS,
         ]
@@ -1881,6 +1884,7 @@ impl Target {
                                 Some("cfi") => SanitizerSet::CFI,
                                 Some("leak") => SanitizerSet::LEAK,
                                 Some("memory") => SanitizerSet::MEMORY,
+                                Some("memtag") => SanitizerSet::MEMTAG,
                                 Some("thread") => SanitizerSet::THREAD,
                                 Some("hwaddress") => SanitizerSet::HWADDRESS,
                                 Some(s) => return Err(format!("unknown sanitizer {}", s)),
-- 
cgit 1.4.1-3-g733a5