1 files changed, 49 insertions, 0 deletions
diff --git a/third_party/rust/crash-context/tests/capture_context.rs b/third_party/rust/crash-context/tests/capture_context.rs
new file mode 100644
index 0000000000..641e1dd706
--- /dev/null
+++ b/third_party/rust/crash-context/tests/capture_context.rs
@@ -0,0 +1,49 @@
+#[test]
+fn captures() {
+    fn one() {
+        two();
+    }
+
+    fn two() {
+        three();
+    }
+
+    #[allow(unsafe_code)]
+    fn three() {
+        cfg_if::cfg_if! {
+            if #[cfg(target_os = "windows")] {
+                let ctx = unsafe {
+                    let mut ctx = std::mem::MaybeUninit::zeroed();
+                    crash_context::capture_context(ctx.as_mut_ptr());
+
+                    ctx.assume_init()
+                };
+
+                cfg_if::cfg_if! {
+                    if #[cfg(target_arch = "x86_64")] {
+                        assert!(ctx.Rbp != 0);
+                        assert!(ctx.Rsp != 0);
+                        assert!(ctx.Rip != 0);
+                    } else if #[cfg(target_arch = "x86")] {
+                        assert!(ctx.Ebp != 0);
+                        assert!(ctx.Esp != 0);
+                        assert!(ctx.Eip != 0);
+                    }
+                }
+            } else if #[cfg(all(target_os = "linux", target_arch = "x86_64"))] {
+                let ctx = unsafe {
+                    let mut ctx = std::mem::MaybeUninit::zeroed();
+                    assert_eq!(crash_context::crash_context_getcontext(ctx.as_mut_ptr()), 0);
+                    ctx.assume_init()
+                };
+
+                let gregs = &ctx.uc_mcontext.gregs;
+                assert!(gregs[libc::REG_RBP as usize] != 0);
+                assert!(gregs[libc::REG_RSP as usize] != 0);
+                assert!(gregs[libc::REG_RIP as usize] != 0);
+            }
+        }
+    }
+
+    one();
+}