From c0744e1e0c35b1083733fd5c74fc3fb5a6cd04f7 Mon Sep 17 00:00:00 2001
From: Andrew Paverd <andrew.paverd@microsoft.com>
Date: Mon, 13 Jan 2020 13:25:39 +0000
Subject: Add support for Control Flow Guard on Windows.

This patch enables rustc to emit the required LLVM module flags to enable Control Flow Guard metadata (cfguard=1) or metadata and checks (cfguard=2). The LLVM module flags are ignored on unsupported targets and operating systems.
---
 src/test/codegen/cfguard_checks.rs   | 10 ++++++++++
 src/test/codegen/cfguard_disabled.rs | 10 ++++++++++
 src/test/codegen/cfguard_nochecks.rs | 10 ++++++++++
 3 files changed, 30 insertions(+)
 create mode 100644 src/test/codegen/cfguard_checks.rs
 create mode 100644 src/test/codegen/cfguard_disabled.rs
 create mode 100644 src/test/codegen/cfguard_nochecks.rs

(limited to 'src/test/codegen')

diff --git a/src/test/codegen/cfguard_checks.rs b/src/test/codegen/cfguard_checks.rs
new file mode 100644
index 00000000000..40a7353eac0
--- /dev/null
+++ b/src/test/codegen/cfguard_checks.rs
@@ -0,0 +1,10 @@
+// compile-flags: -Z control_flow_guard=checks
+
+#![crate_type = "lib"]
+
+// A basic test function.
+pub fn test() {
+}
+
+// Ensure the module flag cfguard=2 is present
+// CHECK: !"cfguard", i32 2
diff --git a/src/test/codegen/cfguard_disabled.rs b/src/test/codegen/cfguard_disabled.rs
new file mode 100644
index 00000000000..d1747931e15
--- /dev/null
+++ b/src/test/codegen/cfguard_disabled.rs
@@ -0,0 +1,10 @@
+// compile-flags: -Z control_flow_guard=disabled
+
+#![crate_type = "lib"]
+
+// A basic test function.
+pub fn test() {
+}
+
+// Ensure the module flag cfguard is not present
+// CHECK-NOT: !"cfguard"
diff --git a/src/test/codegen/cfguard_nochecks.rs b/src/test/codegen/cfguard_nochecks.rs
new file mode 100644
index 00000000000..c5d7afbae25
--- /dev/null
+++ b/src/test/codegen/cfguard_nochecks.rs
@@ -0,0 +1,10 @@
+// compile-flags: -Z control_flow_guard=nochecks
+
+#![crate_type = "lib"]
+
+// A basic test function.
+pub fn test() {
+}
+
+// Ensure the module flag cfguard=1 is present
+// CHECK: !"cfguard", i32 1
-- 
cgit 1.4.1-3-g733a5