1 files changed, 70 insertions, 0 deletions
diff --git a/src/seastar/tests/unit/unwind_test.cc b/src/seastar/tests/unit/unwind_test.cc
new file mode 100644
index 00000000..b2f2e7f5
--- /dev/null
+++ b/src/seastar/tests/unit/unwind_test.cc
@@ -0,0 +1,70 @@
+/*
+ * This file is open source software, licensed to you under the terms
+ * of the Apache License, Version 2.0 (the "License").  See the NOTICE file
+ * distributed with this work for additional information regarding copyright
+ * ownership.  You may not use this file except in compliance with the License.
+ *
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+/*
+ * Copyright 2016 ScyllaDB
+ */
+
+#define BOOST_TEST_MODULE core
+
+#include <boost/test/included/unit_test.hpp>
+#include <pthread.h>
+#include <seastar/util/defer.hh>
+#include <seastar/core/posix.hh>
+#include <seastar/util/backtrace.hh>
+
+using namespace seastar;
+
+void foo() {
+    throw std::runtime_error("foo");
+}
+
+// Exploits issue #1725
+BOOST_AUTO_TEST_CASE(test_signal_mask_is_preserved_on_unwinding) {
+    sigset_t mask;
+    sigset_t old;
+    sigfillset(&mask);
+    auto res = ::pthread_sigmask(SIG_SETMASK, &mask, &old);
+    throw_pthread_error(res);
+
+    // Check which signals we actually managed to block
+    res = ::pthread_sigmask(SIG_SETMASK, NULL, &mask);
+    throw_pthread_error(res);
+
+    try {
+        foo();
+    } catch (...) {
+        // ignore
+    }
+
+    // Check backtrace()
+    {
+        size_t count = 0;
+        backtrace([&count] (auto) { ++count; });
+        BOOST_REQUIRE(count > 0);
+    }
+
+    {
+        sigset_t mask2;
+        auto res = ::pthread_sigmask(SIG_SETMASK, &old, &mask2);
+        throw_pthread_error(res);
+
+        for (int i = 1; i < NSIG; ++i) {
+            BOOST_REQUIRE(sigismember(&mask2, i) == sigismember(&mask, i));
+        }
+    }
+}