Open source system call tests.

PiperOrigin-RevId: 224886231
Change-Id: I0fccb4d994601739d8b16b1d4e6b31f40297fb22

1 files changed, 86 insertions, 0 deletions

diff --git a/test/syscalls/linux/sysinfo.cc b/test/syscalls/linux/sysinfo.cc
new file mode 100644
index 000000000..a0dd82640
--- /dev/null
+++ b/test/syscalls/linux/sysinfo.cc
@@ -0,0 +1,86 @@
+// Copyright 2018 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// This is a very simple sanity test to validate that the sysinfo syscall is
+// supported by gvisor and returns sane values.
+#include <sys/syscall.h>
+#include <sys/sysinfo.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+#include "gtest/gtest.h"
+#include "absl/time/clock.h"
+#include "absl/time/time.h"
+#include "test/util/test_util.h"
+
+namespace gvisor {
+namespace testing {
+
+namespace {
+
+TEST(SysinfoTest, SysinfoIsCallable) {
+  struct sysinfo ignored = {};
+  EXPECT_THAT(syscall(SYS_sysinfo, &ignored), SyscallSucceedsWithValue(0));
+}
+
+TEST(SysinfoTest, EfaultProducedOnBadAddress) {
+  // Validate that we return EFAULT when a bad address is provided.
+  // specified by man 2 sysinfo
+  EXPECT_THAT(syscall(SYS_sysinfo, nullptr), SyscallFailsWithErrno(EFAULT));
+}
+
+TEST(SysinfoTest, TotalRamSaneValue) {
+  struct sysinfo s = {};
+  EXPECT_THAT(sysinfo(&s), SyscallSucceedsWithValue(0));
+  EXPECT_GT(s.totalram, 0);
+}
+
+TEST(SysinfoTest, MemunitSet) {
+  struct sysinfo s = {};
+  EXPECT_THAT(sysinfo(&s), SyscallSucceedsWithValue(0));
+  EXPECT_GE(s.mem_unit, 1);
+}
+
+TEST(SysinfoTest, UptimeSaneValue) {
+  struct sysinfo s = {};
+  EXPECT_THAT(sysinfo(&s), SyscallSucceedsWithValue(0));
+  EXPECT_GE(s.uptime, 0);
+}
+
+TEST(SysinfoTest, UptimeIncreasingValue) {
+  struct sysinfo s = {};
+  EXPECT_THAT(sysinfo(&s), SyscallSucceedsWithValue(0));
+  absl::SleepFor(absl::Seconds(2));
+  struct sysinfo s2 = {};
+  EXPECT_THAT(sysinfo(&s2), SyscallSucceedsWithValue(0));
+  EXPECT_LT(s.uptime, s2.uptime);
+}
+
+TEST(SysinfoTest, FreeRamSaneValue) {
+  struct sysinfo s = {};
+  EXPECT_THAT(sysinfo(&s), SyscallSucceedsWithValue(0));
+  EXPECT_GT(s.freeram, 0);
+  EXPECT_LT(s.freeram, s.totalram);
+}
+
+TEST(SysinfoTest, NumProcsSaneValue) {
+  struct sysinfo s = {};
+  EXPECT_THAT(sysinfo(&s), SyscallSucceedsWithValue(0));
+  EXPECT_GT(s.procs, 0);
+}
+
+}  // namespace
+
+}  // namespace testing
+}  // namespace gvisor