From 8d6c973c7f77e63a9c5d1ce4b7c71a37fcc46f4d Mon Sep 17 00:00:00 2001 From: Andrew Brown Date: Fri, 28 Jan 2022 09:48:59 -0800 Subject: Add support for control-flow protection This change adds a flag for configuring control-flow protection in the LLVM backend. In Clang, this flag is exposed as `-fcf-protection` with options `none|branch|return|full`. This convention is followed for `rustc`, though as a codegen option: `rustc -Z cf-protection=`. Co-authored-by: BlackHoleFox --- src/test/codegen/cf-protection.rs | 38 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 38 insertions(+) create mode 100644 src/test/codegen/cf-protection.rs (limited to 'src/test/codegen') diff --git a/src/test/codegen/cf-protection.rs b/src/test/codegen/cf-protection.rs new file mode 100644 index 00000000000..ccbc863f571 --- /dev/null +++ b/src/test/codegen/cf-protection.rs @@ -0,0 +1,38 @@ +// Test that the correct module flags are emitted with different control-flow protection flags. + +// revisions: undefined none branch return full +// needs-llvm-components: x86 +// [undefined] compile-flags: +// [none] compile-flags: -Z cf-protection=none +// [branch] compile-flags: -Z cf-protection=branch +// [return] compile-flags: -Z cf-protection=return +// [full] compile-flags: -Z cf-protection=full +// compile-flags: --target x86_64-unknown-linux-gnu + +#![crate_type = "lib"] +#![feature(no_core, lang_items)] +#![no_core] + +#[lang="sized"] +trait Sized { } + +// A basic test function. +pub fn test() { +} + +// undefined-NOT: !"cf-protection-branch" +// undefined-NOT: !"cf-protection-return" + +// none-NOT: !"cf-protection-branch" +// none-NOT: !"cf-protection-return" + +// branch-NOT: !"cf-protection-return" +// branch: !"cf-protection-branch", i32 1 +// branch-NOT: !"cf-protection-return" + +// return-NOT: !"cf-protection-branch" +// return: !"cf-protection-return", i32 1 +// return-NOT: !"cf-protection-branch" + +// full: !"cf-protection-branch", i32 1 +// full: !"cf-protection-return", i32 1 -- cgit 1.4.1-3-g733a5