Merge "main: log stack traces for std::terminate" into main

2 files changed, 62 insertions, 1 deletions

diff --git a/tests/unit/libmain/crash.cc b/tests/unit/libmain/crash.cc
new file mode 100644
index 000000000..883dc39bd
--- /dev/null
+++ b/tests/unit/libmain/crash.cc
@@ -0,0 +1,56 @@
+#include <gtest/gtest.h>
+#include "crash-handler.hh"
+
+namespace nix {
+
+class OopsException : public std::exception
+{
+    const char * msg;
+
+public:
+    OopsException(const char * msg) : msg(msg) {}
+    const char * what() const noexcept override
+    {
+        return msg;
+    }
+};
+
+void causeCrashForTesting(std::function<void()> fixture)
+{
+    registerCrashHandler();
+    std::cerr << "time to crash\n";
+    try {
+        fixture();
+    } catch (...) {
+        std::terminate();
+    }
+}
+
+TEST(CrashHandler, exceptionName)
+{
+    ASSERT_DEATH(
+        causeCrashForTesting([]() { throw OopsException{"lol oops"}; }),
+        "time to crash\nLix crashed.*OopsException: lol oops"
+    );
+}
+
+TEST(CrashHandler, unknownTerminate)
+{
+    ASSERT_DEATH(
+        causeCrashForTesting([]() { std::terminate(); }),
+        "time to crash\nLix crashed.*std::terminate\\(\\) called without exception"
+    );
+}
+
+TEST(CrashHandler, nonStdException)
+{
+    ASSERT_DEATH(
+        causeCrashForTesting([]() {
+            // NOLINTNEXTLINE(hicpp-exception-baseclass): intentional
+            throw 4;
+        }),
+        "time to crash\nLix crashed.*Unknown exception! Spooky\\."
+    );
+}
+
+}
diff --git a/tests/unit/meson.build b/tests/unit/meson.build
index 5baf10de2..3d3930731 100644
--- a/tests/unit/meson.build
+++ b/tests/unit/meson.build
@@ -264,9 +264,14 @@ test(
   protocol : 'gtest',
 )
 
+libmain_tests_sources = files(
+  'libmain/crash.cc',
+  'libmain/progress-bar.cc',
+)
+
 libmain_tester = executable(
   'liblixmain-tests',
-  files('libmain/progress-bar.cc'),
+  libmain_tests_sources,
   dependencies : [
     liblixmain,
     liblixexpr,