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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-17 12:18:58 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-17 12:18:58 +0000
commita4b7ed7a42c716ab9f05e351f003d589124fd55d (patch)
treeb620cd3f223850b28716e474e80c58059dca5dd4 /tests/run-make-fulldeps/c-unwind-abi-catch-panic
parentAdding upstream version 1.67.1+dfsg1. (diff)
downloadrustc-a4b7ed7a42c716ab9f05e351f003d589124fd55d.tar.xz
rustc-a4b7ed7a42c716ab9f05e351f003d589124fd55d.zip
Adding upstream version 1.68.2+dfsg1.upstream/1.68.2+dfsg1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'tests/run-make-fulldeps/c-unwind-abi-catch-panic')
-rw-r--r--tests/run-make-fulldeps/c-unwind-abi-catch-panic/Makefile5
-rw-r--r--tests/run-make-fulldeps/c-unwind-abi-catch-panic/add.c12
-rw-r--r--tests/run-make-fulldeps/c-unwind-abi-catch-panic/main.rs44
3 files changed, 61 insertions, 0 deletions
diff --git a/tests/run-make-fulldeps/c-unwind-abi-catch-panic/Makefile b/tests/run-make-fulldeps/c-unwind-abi-catch-panic/Makefile
new file mode 100644
index 000000000..e93ec99da
--- /dev/null
+++ b/tests/run-make-fulldeps/c-unwind-abi-catch-panic/Makefile
@@ -0,0 +1,5 @@
+include ../tools.mk
+
+all: $(call NATIVE_STATICLIB,add)
+ $(RUSTC) main.rs
+ $(call RUN,main) || exit 1
diff --git a/tests/run-make-fulldeps/c-unwind-abi-catch-panic/add.c b/tests/run-make-fulldeps/c-unwind-abi-catch-panic/add.c
new file mode 100644
index 000000000..444359451
--- /dev/null
+++ b/tests/run-make-fulldeps/c-unwind-abi-catch-panic/add.c
@@ -0,0 +1,12 @@
+#ifdef _WIN32
+__declspec(dllexport)
+#endif
+
+// An external function, defined in Rust.
+extern void panic_if_greater_than_10(unsigned x);
+
+unsigned add_small_numbers(unsigned a, unsigned b) {
+ unsigned c = a + b;
+ panic_if_greater_than_10(c);
+ return c;
+}
diff --git a/tests/run-make-fulldeps/c-unwind-abi-catch-panic/main.rs b/tests/run-make-fulldeps/c-unwind-abi-catch-panic/main.rs
new file mode 100644
index 000000000..15d38d721
--- /dev/null
+++ b/tests/run-make-fulldeps/c-unwind-abi-catch-panic/main.rs
@@ -0,0 +1,44 @@
+//! A test for calling `C-unwind` functions across foreign function boundaries.
+//!
+//! This test triggers a panic when calling a foreign function that calls *back* into Rust.
+#![feature(c_unwind)]
+
+use std::panic::{catch_unwind, AssertUnwindSafe};
+
+fn main() {
+ // Call `add_small_numbers`, passing arguments that will NOT trigger a panic.
+ let (a, b) = (9, 1);
+ let c = unsafe { add_small_numbers(a, b) };
+ assert_eq!(c, 10);
+
+ // Call `add_small_numbers`, passing arguments that will trigger a panic, and catch it.
+ let caught_unwind = catch_unwind(AssertUnwindSafe(|| {
+ let (a, b) = (10, 1);
+ let _c = unsafe { add_small_numbers(a, b) };
+ unreachable!("should have unwound instead of returned");
+ }));
+
+ // Assert that we did indeed panic, then unwrap and downcast the panic into the sum.
+ assert!(caught_unwind.is_err());
+ let panic_obj = caught_unwind.unwrap_err();
+ let msg = panic_obj.downcast_ref::<String>().unwrap();
+ assert_eq!(msg, "11");
+}
+
+#[link(name = "add", kind = "static")]
+extern "C-unwind" {
+ /// An external function, defined in C.
+ ///
+ /// Returns the sum of two numbers, or panics if the sum is greater than 10.
+ fn add_small_numbers(a: u32, b: u32) -> u32;
+}
+
+/// This function will panic if `x` is greater than 10.
+///
+/// This function is called by `add_small_numbers`.
+#[no_mangle]
+pub extern "C-unwind" fn panic_if_greater_than_10(x: u32) {
+ if x > 10 {
+ panic!("{}", x); // That is too big!
+ }
+}