sigsegv trace added for better debug

src/ccode/signal.c

@@ -1,6 +1,14 @@
 #include <stddef.h>
 #include <signal.h>
 #include <sys/types.h>
+#include <stdio.h>
+#include <stdbool.h>
+#include <stdlib.h>
+#include <signal.h>
+#include <execinfo.h>
+#include <unistd.h>
+#include <string.h>
+
 typedef void (*sighandler_t)(int);
 sighandler_t sigint_signal;
 
@@ -12,6 +20,39 @@ void unblock_sigint(){
    signal(SIGINT, sigint_signal);
 }
 
+static void sigsegv_handler(int sig) {
+    void *array[10];
+    size_t size;
+    char **strings;
+    size_t i;
+
+    /* Get backtrace */
+    size = backtrace(array, 10);
+    strings = backtrace_symbols(array, size);
+
+    printf("Caught signal %d\n", sig);
+    printf("Backtrace:\n");
+    for (i = 0; i < size; i++) {
+        printf("%s\n", strings[i]);
+    }
+
+    /* Free the memory allocated by backtrace_symbols */
+    free(strings);
+    exit(1);
+}
+static bool sigsegv_trace_enabled = false;
+void enable_sigsegv_trace(){
+    if(sigsegv_trace_enabled){
+        return;
+    }
+    sigsegv_trace_enabled = true;
+    struct sigaction sigact;
+    sigact.sa_handler = sigsegv_handler;
+    sigemptyset(&sigact.sa_mask);
+    sigact.sa_flags = 0;
+    sigaction(SIGSEGV, &sigact, NULL);
+}
+
 #ifndef kill
 int kill(pid_t pid, int sig);
 #endif

src/ymp.vala

@@ -2,12 +2,14 @@ private bool ymp_activated = false;
 
 #ifndef no_locale
 private extern void locale_init();
+private extern void enable_sigsegv_trace();
 public const string GETTEXT_PACKAGE="ymp";
 #endif
 public void ymp_init (string[] args) {
     if(ymp_activated){
         return;
     }
+    enable_sigsegv_trace();
     #ifndef no_locale
     locale_init();
     #endif