From 43764844399af82f407fe963fa708e8f90981ea4 Mon Sep 17 00:00:00 2001
From: 12101111 <w12101111@gmail.com>
Date: Sat, 22 May 2021 01:24:50 +0800
Subject: [PATCH] Diagnose use sanitizers with crt-static

---
 compiler/rustc_session/src/session.rs  | 8 ++++++++
 src/test/ui/sanitize/crt-static.rs     | 5 +++++
 src/test/ui/sanitize/crt-static.stderr | 4 ++++
 3 files changed, 17 insertions(+)
 create mode 100644 src/test/ui/sanitize/crt-static.rs
 create mode 100644 src/test/ui/sanitize/crt-static.stderr

diff --git a/compiler/rustc_session/src/session.rs b/compiler/rustc_session/src/session.rs
index 1348b02b8780f..a388c1b18db25 100644
--- a/compiler/rustc_session/src/session.rs
+++ b/compiler/rustc_session/src/session.rs
@@ -1512,6 +1512,14 @@ fn validate_commandline_args_with_session_available(sess: &Session) {
     if let (Some(first), Some(second)) = (sanitizer_iter.next(), sanitizer_iter.next()) {
         sess.err(&format!("`-Zsanitizer={}` is incompatible with `-Zsanitizer={}`", first, second));
     }
+
+    // Cannot enable crt-static with sanitizers on Linux
+    if sess.crt_static(None) && !sess.opts.debugging_opts.sanitizer.is_empty() {
+        sess.err(
+            "Sanitizer is incompatible with statically linked libc, \
+                                disable it using `-C target-feature=-crt-static`",
+        );
+    }
 }
 
 /// Holds data on the current incremental compilation session, if there is one.
diff --git a/src/test/ui/sanitize/crt-static.rs b/src/test/ui/sanitize/crt-static.rs
new file mode 100644
index 0000000000000..f5dd2a40cc4cb
--- /dev/null
+++ b/src/test/ui/sanitize/crt-static.rs
@@ -0,0 +1,5 @@
+// compile-flags: -Z sanitizer=address -C target-feature=+crt-static --target x86_64-unknown-linux-gnu
+
+#![feature(no_core)]
+#![no_core]
+#![no_main]
diff --git a/src/test/ui/sanitize/crt-static.stderr b/src/test/ui/sanitize/crt-static.stderr
new file mode 100644
index 0000000000000..3a9c636d76046
--- /dev/null
+++ b/src/test/ui/sanitize/crt-static.stderr
@@ -0,0 +1,4 @@
+error: Sanitizer is incompatible with statically linked libc, disable it using `-C target-feature=-crt-static`
+
+error: aborting due to previous error
+