Rollup merge of #149409 - cezarbbb:stable_ssp, r=SparrowLii

Test the coexistence of 'stack-protector' and 'safe-stack'

This is a test to detect the coexistence of 'stack-protector' and 'safe-stack', and it's a supplement to pr rust-lang/rust#147115 . After the solution to issue rust-lang/rust#149340, I rewrote a version using minicore to circumvent the 'abi_mismatch' error.

r? `@SparrowLii` (Do you have time to review it?)

tests/assembly-llvm/stack-protector/stack-protector-safe-stack.rs

@@ -0,0 +1,54 @@
+//@ add-minicore
+//@ revisions: all strong none safestack safestack_strong safestack_all
+//@ assembly-output: emit-asm
+//@ only-x86_64-unknown-linux-gnu
+//@ [all] compile-flags: -Z stack-protector=all
+//@ [strong] compile-flags: -Z stack-protector=strong
+//@ [none] compile-flags: -Z stack-protector=none
+//@ [safestack] compile-flags: -Z stack-protector=none -Z sanitizer=safestack
+//@ [safestack_strong] compile-flags: -Z stack-protector=strong -Z sanitizer=safestack
+//@ [safestack_all] compile-flags: -Z stack-protector=all -Z sanitizer=safestack
+//@ compile-flags: -C opt-level=2 -Z merge-functions=disabled --target x86_64-unknown-linux-gnu
+//@ needs-llvm-components: x86
+
+#![feature(unsized_fn_params)]
+#![crate_type = "lib"]
+#![feature(no_core)]
+#![no_core]
+#![no_std]
+
+extern crate minicore;
+use minicore::*;
+
+extern "C" {
+    fn test4spss(p: *mut u8);
+}
+
+// CHECK-LABEL: test1{{:|\[}}
+#[no_mangle]
+pub unsafe fn test1(x: *mut u8) -> u8 {
+    let mut buf: [u8; 64] = [0; 64];
+
+    let p = &mut buf as *mut [u8; 64] as *mut u8;
+
+    *p = 42;
+
+    test4spss(p);
+
+    *x = *p;
+
+    *p
+
+    // none-NOT: __stack_chk_fail
+    // strong: __stack_chk_fail
+    // all: __stack_chk_fail
+
+    // safestack: __safestack_unsafe_stack_ptr
+    // safestack-NOT: __stack_chk_fail
+
+    // safestack_strong: __safestack_unsafe_stack_ptr
+    // safestack_strong: __stack_chk_fail
+
+    // safestack_all: __safestack_unsafe_stack_ptr
+    // safestack_all: __stack_chk_fail
+}