Rollup merge of #84126 - 12101111:musl-sanitizer, r=davidtwco

Enable sanitizers for x86_64-unknown-linux-musl

Those 4 sanitizers get musl target support in LLVM 12 release.

Author: Dylan-DPC

compiler/rustc_target/src/spec/x86_64_unknown_linux_musl.rs

@@ -1,4 +1,4 @@
-use crate::spec::{LinkerFlavor, StackProbeType, Target};
+use crate::spec::{LinkerFlavor, SanitizerSet, StackProbeType, Target};
 
 pub fn target() -> Target {
     let mut base = super::linux_musl_base::opts();
@@ -7,6 +7,8 @@ pub fn target() -> Target {
     base.pre_link_args.entry(LinkerFlavor::Gcc).or_default().push("-m64".to_string());
     base.stack_probes = StackProbeType::InlineOrCall { min_llvm_version_for_inline: (11, 0, 1) };
     base.static_position_independent_executables = true;
+    base.supported_sanitizers =
+        SanitizerSet::ADDRESS | SanitizerSet::LEAK | SanitizerSet::MEMORY | SanitizerSet::THREAD;
 
     Target {
         llvm_target: "x86_64-unknown-linux-musl".to_string(),

src/bootstrap/native.rs

@@ -814,6 +814,9 @@ fn supported_sanitizers(
         "x86_64-unknown-linux-gnu" => {
             common_libs("linux", "x86_64", &["asan", "lsan", "msan", "tsan"])
         }
+        "x86_64-unknown-linux-musl" => {
+            common_libs("linux", "x86_64", &["asan", "lsan", "msan", "tsan"])
+        }
         _ => Vec::new(),
     }
 }