1 files changed, 25 insertions, 0 deletions
diff --git a/compiler/rustc_codegen_llvm/src/lib.rs b/compiler/rustc_codegen_llvm/src/lib.rs
index 64fedb7bc1a..c66d7d872c9 100644
--- a/compiler/rustc_codegen_llvm/src/lib.rs
+++ b/compiler/rustc_codegen_llvm/src/lib.rs
@@ -288,6 +288,31 @@ impl CodegenBackend for LlvmCodegenBackend {
                 }
                 println!();
             }
+            PrintRequest::StackProtectorStrategies => {
+                println!(
+                    r#"Available stack protector strategies:
+    all
+        Generate stack canaries in all functions.
+
+    strong
+        Generate stack canaries in a function if it either:
+        - has a local variable of `[T; N]` type, regardless of `T` and `N`
+        - takes the address of a local variable.
+
+          (Note that a local variable being borrowed is not equivalent to its
+          address being taken: e.g. some borrows may be removed by optimization,
+          while by-value argument passing may be implemented with reference to a
+          local stack variable in the ABI.)
+
+    basic
+        Generate stack canaries in functions with:
+        - local variables of `[T; N]` type, where `T` is byte-sized and `N` > 8.
+
+    none
+        Do not generate stack canaries.
+"#
+                );
+            }
             req => llvm_util::print(req, sess),
         }
     }