Failed assertions output a backtrace, furthermore added a small library that outputs backtraces on sigsegv

assert/assert.h

@@ -11,11 +11,21 @@
 #include "AssertFailed.h"
 #include <iostream>
 #include <string>
+#include <execinfo.h>
 
 namespace cpputils {
     namespace _assert {
         inline std::string format(const char *expr, const char *message, const char *file, int line) {
-            return std::string()+"Assertion ["+expr+"] failed in "+file+":"+std::to_string(line)+": "+message;
+            // get void*'s for all entries on the stack
+            void *array[10];
+            size_t size = backtrace(array, sizeof(array));
+            char **backtrace_str = backtrace_symbols(array, sizeof(backtrace_str));
+            std::string result = std::string()+"Assertion ["+expr+"] failed in "+file+":"+std::to_string(line)+": "+message+"\n\n";
+            for (unsigned int i = 0; i < size; ++i) {
+                result += std::string(backtrace_str[i]) + "\n";
+            }
+            free(backtrace_str);
+            return result;
         }
 
         inline void assert_fail_release [[noreturn]] (const char *expr, const char *message, const char *file, int line) {

assert/backtrace.cpp

@@ -0,0 +1,21 @@
+#include "backtrace.h"
+#include <execinfo.h>
+#include <signal.h>
+#include <iostream>
+#include <unistd.h>
+
+namespace cpputils {
+
+    void sigsegv_handler(int) {
+        void *array[100];
+        size_t size = backtrace(array, sizeof(array));
+
+        std::cerr << "Error: SIGSEGV" << std::endl;
+        backtrace_symbols_fd(array, size, STDERR_FILENO);
+        exit(1);
+    }
+
+    void showBacktraceOnSigSegv() {
+        signal(SIGSEGV, sigsegv_handler);
+    }
+}

assert/backtrace.h

@@ -0,0 +1,8 @@
+#ifndef MESSMER_CPPUTILS_ASSERT_BACKTRACE_H
+#define MESSMER_CPPUTILS_ASSERT_BACKTRACE_H
+
+namespace cpputils {
+    void showBacktraceOnSigSegv();
+}
+
+#endif