Add SIGINT handler on posix systems (#145)

src/Common/ExceptionHandler/ExceptionHandler_posix.cpp

@@ -0,0 +1,36 @@
+#include <signal.h>
+#include <execinfo.h>
+
+void handler_SIGSEGV(int sig)
+{
+    printf("SIGSEGV!\n");
+
+    void *array[32];
+    size_t size;
+
+    // get void*'s for all entries on the stack
+    size = backtrace(array, 32);
+
+    // print out all the frames to stderr
+    fprintf(stderr, "Error: signal %d:\n", sig);
+    backtrace_symbols_fd(array, size, STDERR_FILENO);
+    exit(1);
+}
+
+void handler_SIGINT(int sig)
+{
+    /*
+     * Received when pressing CTRL + C in a console
+     * Ideally should be exiting cleanly after saving settings but currently
+     * there's no clean exit pathway (at least on linux) and exiting the app
+     * by any mean ends up with a SIGABRT from the standard library destroying
+     * threads.
+     */
+    exit(0);
+}
+
+void ExceptionHandler_init()
+{
+    signal(SIGSEGV, handler_SIGSEGV);
+    signal(SIGINT, handler_SIGINT);
+}