[Server] Add stacktrace

apps/openmw-mp/stacktrace.cpp

@@ -0,0 +1,73 @@
+//
+// Created by koncord on 25.10.17.
+//
+
+#include "stacktrace.hpp"
+#include <components/openmw-mp/Log.hpp>
+
+#ifndef _WIN32
+
+#include <execinfo.h>
+
+void stacktrace()
+{
+    LOG_MESSAGE_SIMPLE(Log::LOG_FATAL, "Stacktrace:");
+
+    void *array[50];
+    int size = backtrace(array, 50);
+
+    auto messages = backtrace_symbols(array, size);
+
+    size_t funcnamesize = 256;
+    auto funcname = (char *) malloc(funcnamesize);
+    //skip first stack frame (points here)
+    for (int i = 1; i < size && messages != nullptr; ++i)
+    {
+        char *beginName = nullptr, *beginOffset = nullptr, *endOffset = nullptr;
+        for (char *p = messages[i]; *p; ++p)
+        {
+            if (*p == '(')
+                beginName = p;
+            else if (*p == '+')
+                beginOffset = p;
+            else if (*p == ')' && beginOffset)
+            {
+                endOffset = p;
+                break;
+            }
+        }
+
+        if (beginName && beginOffset && endOffset && beginName < beginOffset)
+        {
+            *beginName++ = '\0';
+            *beginOffset++ = '\0';
+            *endOffset = '\0';
+
+            // mangled name is now in [beginName, beginOffset) and caller offset in [beginOffset, endOffset).
+
+            int status;
+            char *ret = abi::__cxa_demangle(beginName, funcname, &funcnamesize, &status);
+            if (status == 0)
+            {
+                funcname = ret; // use possibly realloc()-ed string
+                LOG_APPEND(Log::LOG_FATAL, "\t%s : %s+%s", messages[i], funcname, beginOffset);
+            }
+            else // demangling failed.
+                LOG_APPEND(Log::LOG_FATAL, "\t%s : %s()+%s", messages[i], beginName, beginOffset);
+        }
+        else
+            LOG_APPEND(Log::LOG_FATAL, "\t%s", messages[i]);
+    }
+
+    free(messages);
+    free(funcname);
+}
+
+#else
+
+void stacktrace()
+{
+
+}
+
+#endif

apps/openmw-mp/stacktrace.hpp

@@ -0,0 +1,10 @@
+//
+// Created by koncord on 25.10.17.
+//
+
+#ifndef OPENMW_STACKTRACE_HPP
+#define OPENMW_STACKTRACE_HPP
+
+void stacktrace();
+
+#endif //OPENMW_STACKTRACE_HPP