[PATCH 03/11] add gsync tests

[Luca Dariz]

---
 tests/test-gsync.c | 122 +++++++++++++++++++++++++++++++++++++++++++++
 tests/user-qemu.mk |   3 +-
 2 files changed, 124 insertions(+), 1 deletion(-)
 create mode 100644 tests/test-gsync.c

diff --git a/tests/test-gsync.c b/tests/test-gsync.c
new file mode 100644
index 00000000..a5160651
--- /dev/null
+++ b/tests/test-gsync.c
@@ -0,0 +1,122 @@
+/*
+ *  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.
+ */
+
+#include <syscalls.h>
+#include <testlib.h>
+
+#include <mach/machine/vm_param.h>
+#include <mach/std_types.h>
+#include <mach/mach_types.h>
+#include <mach/vm_wire.h>
+
+#include <mach.user.h>
+#include <gnumach.user.h>
+
+/* Gsync flags.  */
+#ifndef GSYNC_SHARED
+# define GSYNC_SHARED      0x01
+# define GSYNC_QUAD        0x02
+# define GSYNC_TIMED       0x04
+# define GSYNC_BROADCAST   0x08
+# define GSYNC_MUTATE      0x10
+#endif
+
+static uint32_t single_shared;
+static struct {
+  uint32_t val1;
+  uint32_t val2;
+} single_shared_quad;
+
+static void test_single()
+{
+  int err;
+  single_shared = 0;
+  err = gsync_wait(mach_task_self(), (vm_offset_t)&single_shared, 0, 0, 100, 
GSYNC_TIMED);
+  ASSERT(err == KERN_TIMEDOUT, "gsync_wait did not timeout");
+
+  single_shared = 1;
+  err = gsync_wait(mach_task_self(), (vm_offset_t)&single_shared, 0, 0, 100, 
GSYNC_TIMED);
+  ASSERT(err == KERN_INVALID_ARGUMENT, "gsync_wait on wrong value");
+  err = gsync_wait(mach_task_self(), (vm_offset_t)&single_shared, 1, 0, 100, 
GSYNC_TIMED);
+  ASSERT(err == KERN_TIMEDOUT, "gsync_wait again on correct value did not 
timeout");
+
+  single_shared_quad.val1 = 1;
+  single_shared_quad.val2 = 2;
+  err = gsync_wait(mach_task_self(), (vm_offset_t)&single_shared_quad, 99, 88,
+                   100, GSYNC_TIMED | GSYNC_QUAD);
+  ASSERT(err == KERN_INVALID_ARGUMENT, "gsync_wait on wrong quad value");
+  err = gsync_wait(mach_task_self(), (vm_offset_t)&single_shared_quad, 1, 2,
+                   100, GSYNC_TIMED | GSYNC_QUAD);
+  ASSERT(err == KERN_TIMEDOUT, "gsync_wait again on correct value did not 
timeout");
+
+  err = gsync_wake(mach_task_self(), (vm_offset_t)&single_shared, 0, 0);
+  ASSERT_RET(err, "gsync_wake with nobody waiting");
+
+  err = gsync_wait(mach_task_self(), (vm_offset_t)&single_shared, 1, 0, 100, 
GSYNC_TIMED);
+  ASSERT(err == KERN_TIMEDOUT, "gsync_wait not affected by previous 
gsync_wake");
+
+  err = gsync_wake(mach_task_self(), (vm_offset_t)&single_shared, 0, 
GSYNC_BROADCAST);
+  ASSERT_RET(err, "gsync_wake broadcast with nobody waiting");
+
+  err = gsync_wait(mach_task_self(), (vm_offset_t)&single_shared, 1, 0, 100, 
GSYNC_TIMED);
+  ASSERT(err == KERN_TIMEDOUT, "gsync_wait not affected by previous 
gsync_wake");
+
+  err = gsync_wake(mach_task_self(), (vm_offset_t)&single_shared, 2, 
GSYNC_MUTATE);
+  ASSERT_RET(err, "gsync_wake nobody + mutate");
+  ASSERT(single_shared == 2, "gsync_wake single_shared did not mutate");
+
+  err = gsync_wake(mach_task_self(), (vm_offset_t)&single_shared, 0, 0);
+  ASSERT_RET(err, "gsync_wake nobody without mutate");
+  err = gsync_wake(mach_task_self(), (vm_offset_t)&single_shared, 0, 0);
+  ASSERT_RET(err, "gsync_wake 3a");
+}
+
+static void single_thread_setter(void *arg)
+{
+  int err;
+  int val = (long)arg;
+
+  /* It should be enough to sleep a bit for our creator to call
+     gsync_wait(). To verify that the test is performed with the
+     correct sequence, we also change the value so if the wait is
+     called after our wake it will fail with KERN_INVALID_ARGUMENT */
+  msleep(100);
+
+  err = gsync_wake(mach_task_self(), (vm_offset_t)&single_shared, val, 
GSYNC_MUTATE);
+  ASSERT_RET(err, "gsync_wake from thread + mutate");
+
+  thread_terminate(mach_thread_self());
+  FAILURE("thread_terminate");
+}
+
+static void test_single_from_thread()
+{
+  int err;
+  single_shared = 10;
+  test_thread_start(mach_task_self(), single_thread_setter, (void*)11);
+  err = gsync_wait(mach_task_self(), (vm_offset_t)&single_shared, 10, 0, 0, 0);
+  ASSERT_RET(err, "gsync_wait without timeout for wake from another thread");
+  ASSERT(single_shared == 11, "wake didn't mutate");
+}
+
+int main(int argc, char *argv[], int envc, char *envp[])
+{
+  test_single_from_thread();
+  test_single();
+  return 0;
+}
diff --git a/tests/user-qemu.mk b/tests/user-qemu.mk
index 8b338241..7c5e6927 100644
--- a/tests/user-qemu.mk
+++ b/tests/user-qemu.mk
@@ -196,7 +196,8 @@ clean-test-%:
 
 USER_TESTS := \
        tests/test-hello \
-       tests/test-mach_host
+       tests/test-mach_host \
+       tests/test-gsync
 
 USER_TESTS_CLEAN = $(subst tests/,clean-,$(USER_TESTS))
 
-- 
2.39.2