Route diagnostic hooks through platform services

src/platform_legacy/legacy_platform_services.cpp

@@ -101,6 +101,26 @@ public:
 #endif
     }
 
+    void log_stacktrace() override
+    {
+#if defined(__OSX__)
+        NSString* callstack = [[NSThread callStackSymbols] componentsJoinedByString:@"\n"];
+        LOG("callstack:\n%s", [callstack cStringUsingEncoding:NSUTF8StringEncoding]);
+#endif
+    }
+
+    void trigger_crash_test() override
+    {
+#ifdef __IOS__
+        [App::I->ios_view crash];
+#elif __OSX__
+        [App::I->osx_view hockeyapp_crash];
+#elif defined(__ANDROID__)
+        int *x = nullptr; *x = 42;
+        LOG("%d", *x);
+#endif
+    }
+
     [[nodiscard]] std::string clipboard_text() override
     {
 #if __IOS__