restored timeout handling (with SIGALRM for now)

src/afl-analyze.c

@@ -225,6 +225,20 @@ static s32 write_to_file(u8 *path, u8 *mem, u32 len) {
 
 }
 
+
+/* Handle timeout signal. */
+
+static void handle_timeout(int sig) {
+
+  (void)sig;
+
+  child_timed_out = 1;
+
+  if (child_pid > 0) kill(child_pid, SIGKILL);
+
+}
+
+
 /* Execute target application. Returns exec checksum, or 0 if program
    times out. */
 
@@ -904,6 +918,11 @@ static void setup_signal_handlers(void) {
   sigaction(SIGINT, &sa, NULL);
   sigaction(SIGTERM, &sa, NULL);
 
+  /* Exec timeout notifications. */
+
+  sa.sa_handler = handle_timeout;
+  sigaction(SIGALRM, &sa, NULL);
+
 }
 
 /* Display usage hints. */