add basic user-space tests with qemu

* configure.ac: move test fragment to have USER32
* tests/Makefrag.am: add user tests
* tests/README: add basic info on how to run and debug user tests
* tests/configfrag.ac: allow the test compiler/flags to be
  autoconfigured or customized
* tests/grub.cfg.single.template: add minimal grub config to boot a
  module
* tests/include/device/cons.h: add a simplified version of
  device/cons.h usable for tests
* tests/include/kern/printf.h: symlink to kern/printf.h
* tests/include/mach/mig_support.h: add basic version for user-space
  tests
* tests/include/syscalls.h: add prototypes for syscalls used in tests.
* tests/include/testlib.h: add definitions for common test
  functionalities
* tests/include/util/atoi.h: symlink to util/atoi.h
* tests/run-qemu.sh.template: add a simple qemu test runner
* tests/start.S: add arch-specific entry point
* tests/syscalls.S: generate syscalls entry points
* tests/test-hello.c: add basic smoke test
* tests/testlib.c: add the minimal functionality to run a user-space
  executable and reboot the system, and some test helpers.
* tests/user-qemu.mk: add rules to build simple user-space test
  modules, including generating mig stubs. The tests reuse some kernel
  code (like printf(), mach_atoi(), mem*(), str*() functions) so we can
  use the freestanding environment and not depend on glibc.
Message-ID: <20240111210907.419689-1-luca@orpolo.org>

1 files changed, 38 insertions, 0 deletions

diff --git a/tests/run-qemu.sh.template b/tests/run-qemu.sh.template
new file mode 100644
index 00000000..aba8d68a
--- /dev/null
+++ b/tests/run-qemu.sh.template
@@ -0,0 +1,38 @@
+#!/bin/sh
+# Copyright (C) 2024 Free Software Foundation
+#
+# This program is free software ; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation ; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY ; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with the program ; if not, write to the Free Software
+# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+set -e
+
+cmd="QEMU_BIN QEMU_OPTS -cdrom tests/test-TESTNAME.iso"
+log="tests/test-TESTNAME.raw"
+
+echo "temp log $log"
+if which QEMU_BIN >/dev/null ; then
+    if ! timeout -v --foreground --kill-after=3 15s $cmd \
+            | tee $log | sed -n "/TEST_START_MARKER/"',$p' ; then
+        exit 10  # timeout
+    fi
+    if grep -qi 'TEST_FAILURE_MARKER' $log; then
+        exit 99  # error marker found, test explicitely failed
+    fi
+    if ! grep -q 'TEST_SUCCESS_MARKER' $log; then
+        exit 12  # missing reboot marker, maybe the kernel crashed
+    fi
+else
+    echo "skipping, QEMU_BIN not found"
+    exit 77
+fi