Kernel: cleanup sys_exec()

We now scope everyting so desctructors get called

kernel/kernel/Process.cpp

@@ -314,6 +314,8 @@ namespace Kernel
 	}
 
 	BAN::ErrorOr<long> Process::sys_exec(BAN::StringView path, const char* const* argv, const char* const* envp)
+	{
+		// NOTE: We scope everything for automatic deletion
 		{
 			BAN::Vector<BAN::String> str_argv;
 			for (int i = 0; argv && argv[i]; i++)
@@ -355,6 +357,7 @@ namespace Kernel
 			ASSERT(m_threads.size() == 1);
 			ASSERT(&Process::current() == this);
 
+			// allocate memory on the new process for arguments and environment
 			{
 				LockGuard _(page_table());
 
@@ -379,13 +382,10 @@ namespace Kernel
 
 			m_userspace_info.argc = str_argv.size();
 
-		// NOTE: These must be manually cleared since this function won't return after this point
-		str_argv.clear();
-		str_envp.clear();
-
-		CriticalScope _;
-		lock_guard.~LockGuard();
+			asm volatile("cli");
 			m_threads.front()->setup_exec();
+		}
+
 		Scheduler::get().execute_current_thread();
 		ASSERT_NOT_REACHED();
 	}