Rollup merge of #68681 - bobrippling:fix-matched-angle-brackets, r=Centril

[rust.git] / src / librustc_codegen_llvm / context.rs

diff --git a/src/librustc_codegen_llvm/context.rs b/src/librustc_codegen_llvm/context.rs
index 50a35fe3dcf1db17f988566c0de2b0bc54de926b..6b31f14410d2f23630aa2b72a8afbb124c2e0e78 100644 (file)
--- a/src/librustc_codegen_llvm/context.rs
+++ b/src/librustc_codegen_llvm/context.rs
@@ -12,7 +12,7 @@
 use crate::callee::get_fn;
 use rustc::bug;
 use rustc::mir::mono::CodegenUnit;
-use rustc::session::config::{self, DebugInfo};
+use rustc::session::config::{self, CFGuard, DebugInfo};
 use rustc::session::Session;
 use rustc::ty::layout::{
     FnAbiExt, HasParamEnv, LayoutError, LayoutOf, PointeeInfo, Size, TyLayout, VariantIdx,
@@ -227,6 +227,16 @@ pub unsafe fn create_module(
         llvm::LLVMRustAddModuleFlag(llmod, avoid_plt, 1);
     }
 
+    // Set module flags to enable Windows Control Flow Guard (/guard:cf) metadata
+    // only (`cfguard=1`) or metadata and checks (`cfguard=2`).
+    match sess.opts.debugging_opts.control_flow_guard {
+        CFGuard::Disabled => {}
+        CFGuard::NoChecks => {
+            llvm::LLVMRustAddModuleFlag(llmod, "cfguard\0".as_ptr() as *const _, 1)
+        }
+        CFGuard::Checks => llvm::LLVMRustAddModuleFlag(llmod, "cfguard\0".as_ptr() as *const _, 2),
+    }
+
     llmod
 }