From 698f8c2f01ea549d77d7dc3338a12e04c11057b9 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Wed, 17 Apr 2024 14:02:58 +0200
Subject: Adding upstream version 1.64.0+dfsg1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 .../run-make-fulldeps/foreign-exceptions/Makefile  | 10 ++++
 .../run-make-fulldeps/foreign-exceptions/foo.cpp   | 60 ++++++++++++++++++++++
 .../run-make-fulldeps/foreign-exceptions/foo.rs    | 59 +++++++++++++++++++++
 3 files changed, 129 insertions(+)
 create mode 100644 src/test/run-make-fulldeps/foreign-exceptions/Makefile
 create mode 100644 src/test/run-make-fulldeps/foreign-exceptions/foo.cpp
 create mode 100644 src/test/run-make-fulldeps/foreign-exceptions/foo.rs

(limited to 'src/test/run-make-fulldeps/foreign-exceptions')

diff --git a/src/test/run-make-fulldeps/foreign-exceptions/Makefile b/src/test/run-make-fulldeps/foreign-exceptions/Makefile
new file mode 100644
index 000000000..7eba52f3c
--- /dev/null
+++ b/src/test/run-make-fulldeps/foreign-exceptions/Makefile
@@ -0,0 +1,10 @@
+-include ../tools.mk
+
+all: foo
+	$(call RUN,foo)
+
+foo: foo.rs $(call NATIVE_STATICLIB,foo)
+	$(RUSTC) $< -lfoo $(EXTRARSCXXFLAGS)
+
+$(TMPDIR)/libfoo.o: foo.cpp
+	$(call COMPILE_OBJ_CXX,$@,$<)
diff --git a/src/test/run-make-fulldeps/foreign-exceptions/foo.cpp b/src/test/run-make-fulldeps/foreign-exceptions/foo.cpp
new file mode 100644
index 000000000..8182021a2
--- /dev/null
+++ b/src/test/run-make-fulldeps/foreign-exceptions/foo.cpp
@@ -0,0 +1,60 @@
+#include <assert.h>
+#include <stddef.h>
+#include <stdio.h>
+
+void println(const char* s) {
+    puts(s);
+    fflush(stdout);
+}
+
+struct exception {};
+struct rust_panic {};
+
+struct drop_check {
+    bool* ok;
+    ~drop_check() {
+        println("~drop_check");
+
+        if (ok)
+            *ok = true;
+    }
+};
+
+extern "C" {
+    void rust_catch_callback(void (*cb)(), bool* rust_ok);
+
+    void throw_cxx_exception() {
+        println("throwing C++ exception");
+        throw exception();
+    }
+
+    void test_cxx_exception() {
+        bool rust_ok = false;
+        try {
+            rust_catch_callback(throw_cxx_exception, &rust_ok);
+            assert(false && "unreachable");
+        } catch (exception e) {
+            println("caught C++ exception");
+            assert(rust_ok);
+            return;
+        }
+        assert(false && "did not catch thrown C++ exception");
+    }
+
+    void cxx_catch_callback(void (*cb)(), bool* cxx_ok) {
+        drop_check x;
+        x.ok = NULL;
+        try {
+            cb();
+        } catch (rust_panic e) {
+            assert(false && "shouldn't be able to catch a rust panic");
+        } catch (...) {
+            println("caught foreign exception in catch (...)");
+            // Foreign exceptions are caught by catch (...). We only set the ok
+            // flag if we successfully caught the panic. The destructor of
+            // drop_check will then set the flag to true if it is executed.
+            x.ok = cxx_ok;
+            throw;
+        }
+    }
+}
diff --git a/src/test/run-make-fulldeps/foreign-exceptions/foo.rs b/src/test/run-make-fulldeps/foreign-exceptions/foo.rs
new file mode 100644
index 000000000..dd3b7c76f
--- /dev/null
+++ b/src/test/run-make-fulldeps/foreign-exceptions/foo.rs
@@ -0,0 +1,59 @@
+// Tests that C++ exceptions can unwind through Rust code run destructors and
+// are caught by catch_unwind. Also tests that Rust panics can unwind through
+// C++ code.
+
+#![feature(c_unwind)]
+
+use std::panic::{catch_unwind, AssertUnwindSafe};
+
+struct DropCheck<'a>(&'a mut bool);
+impl<'a> Drop for DropCheck<'a> {
+    fn drop(&mut self) {
+        println!("DropCheck::drop");
+        *self.0 = true;
+    }
+}
+
+extern "C" {
+    fn test_cxx_exception();
+}
+
+extern "C-unwind" {
+    fn cxx_catch_callback(cb: extern "C-unwind" fn(), ok: *mut bool);
+}
+
+#[no_mangle]
+extern "C-unwind" fn rust_catch_callback(cb: extern "C-unwind" fn(), rust_ok: &mut bool) {
+    let _drop = DropCheck(rust_ok);
+    cb();
+    unreachable!("should have unwound instead of returned");
+}
+
+fn test_rust_panic() {
+    extern "C-unwind" fn callback() {
+        println!("throwing rust panic");
+        panic!(1234i32);
+    }
+
+    let mut dropped = false;
+    let mut cxx_ok = false;
+    let caught_unwind = catch_unwind(AssertUnwindSafe(|| {
+        let _drop = DropCheck(&mut dropped);
+        unsafe {
+            cxx_catch_callback(callback, &mut cxx_ok);
+        }
+        unreachable!("should have unwound instead of returned");
+    }));
+    println!("caught rust panic");
+    assert!(dropped);
+    assert!(caught_unwind.is_err());
+    let panic_obj = caught_unwind.unwrap_err();
+    let panic_int = *panic_obj.downcast_ref::<i32>().unwrap();
+    assert_eq!(panic_int, 1234);
+    assert!(cxx_ok);
+}
+
+fn main() {
+    unsafe { test_cxx_exception() };
+    test_rust_panic();
+}
-- 
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