game: Add more ways to crash to the `crash_test` concommand (#807)

Adds more types of crashes to the `crash_test` concommand

2 files changed, 67 insertions, 0 deletions

diff --git a/primedev/Northstar.cmake b/primedev/Northstar.cmake
index 05c3c72a..4e8ec973 100644
--- a/primedev/Northstar.cmake
+++ b/primedev/Northstar.cmake
@@ -69,6 +69,7 @@ add_library(
     "engine/r2engine.cpp"
     "engine/r2engine.h"
     "engine/runframe.cpp"
+    "game/client/clientmode_shared.cpp"
     "logging/crashhandler.cpp"
     "logging/crashhandler.h"
     "logging/logging.cpp"
diff --git a/primedev/game/client/clientmode_shared.cpp b/primedev/game/client/clientmode_shared.cpp
new file mode 100644
index 00000000..e5793261
--- /dev/null
+++ b/primedev/game/client/clientmode_shared.cpp
@@ -0,0 +1,66 @@
+
+//-----------------------------------------------------------------------------
+// Some explanation might be needed for this. The crash is caused by
+// us calling a pure virtual function in the constructor.
+// The order goes like this:
+// ctor
+//   -> vftable = IPureCall::vftable
+//   -> IPureCall::Ok()
+//        -> IPureCall::CallMeIDareYou()
+//             -> purecall_handler
+//                  -> crash :(
+class IPureCall
+{
+public:
+	IPureCall() { Ok(); }
+
+	virtual void CallMeIDareYou() = 0;
+
+	void Ok() { CallMeIDareYou(); }
+};
+
+class CPureCall : IPureCall
+{
+	virtual void CallMeIDareYou() {}
+};
+
+static void (*o_pCC_crash_test_f)(const CCommand& args);
+static void h_CC_crash_test_f(const CCommand& args)
+{
+	int crashtype = 0;
+	int dummy;
+	if (args.ArgC() > 1)
+	{
+		crashtype = atoi(args.Arg(1));
+	}
+	switch (crashtype)
+	{
+	case 0:
+		dummy = *((int*)NULL);
+		spdlog::info("Crashed! {}", dummy);
+		break;
+	case 1:
+		*((int*)NULL) = 24122021;
+		break;
+	case 2:
+		throw std::exception("Crashed!");
+		break;
+	case 3:
+		RaiseException(7, 0, 0, NULL);
+		break;
+	case 4:
+	{
+		CPureCall PureCall;
+		break;
+	}
+	default:
+		spdlog::info("Unknown variety of crash. You have now failed to crash. I hope you're happy.");
+		break;
+	}
+}
+
+ON_DLL_LOAD("engine.dll", ClientModeShared, (CModule module))
+{
+	o_pCC_crash_test_f = module.Offset(0x15BEE0).RCast<decltype(o_pCC_crash_test_f)>();
+	HookAttach(&(PVOID&)o_pCC_crash_test_f, (PVOID)h_CC_crash_test_f);
+}