Return periodically from interactive_run and interactive_until

This avoids stalling the HTIF.

riscv/interactive.cc

@@ -402,9 +402,16 @@ void sim_t::interactive_run(const std::string& cmd, const std::vector<std::strin
   size_t steps = args.size() ? atoll(args[0].c_str()) : -1;
   ctrlc_pressed = false;
   set_procs_debug(noisy);
-  for (size_t i = 0; i < steps && !ctrlc_pressed && !done(); i++)
+
+  const size_t actual_steps = std::min(INTERLEAVE, steps);
+  for (size_t i = 0; i < actual_steps && !ctrlc_pressed && !done(); i++)
     step(1);
 
+  if (actual_steps < steps) {
+    next_interactive_action = [=](){ interactive_run(cmd, {std::to_string(steps - actual_steps)}, noisy); };
+    return;
+  }
+
   std::ostream out(sout_.rdbuf());
   if (!noisy) out << ":" << std::endl;
 }
@@ -736,7 +743,7 @@ void sim_t::interactive_until(const std::string& cmd, const std::vector<std::str
 
   ctrlc_pressed = false;
 
-  while (1)
+  for (size_t i = 0; i < INTERLEAVE; i++)
   {
     try
     {
@@ -746,15 +753,17 @@ void sim_t::interactive_until(const std::string& cmd, const std::vector<std::str
       if (max_xlen == 32) current &= 0xFFFFFFFF;
 
       if (cmd_until == (current == val))
-        break;
+        return;
       if (ctrlc_pressed)
-        break;
+        return;
     }
     catch (trap_t& t) {}
 
     set_procs_debug(noisy);
     step(1);
   }
+
+  next_interactive_action = [=](){ interactive_until(cmd, args, noisy); };
 }
 
 void sim_t::interactive_dumpmems(const std::string& cmd, const std::vector<std::string>& args)