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/*
* Copyright © 2013 Canonical Ltd.
*
* This program is free software: you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License version 3,
* as published by the Free Software Foundation.
*
* 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* Authored by: Thomas Voß <thomas.voss@canonical.com>
*/
#include <core/posix/fork.h>
#include <core/posix/this_process.h>
#include <core/posix/linux/proc/process/stat.h>
#include <core/posix/linux/proc/process/oom_adj.h>
#include <core/posix/linux/proc/process/oom_score.h>
#include <core/posix/linux/proc/process/oom_score_adj.h>
#include <gtest/gtest.h>
#include <map>
TEST(LinuxProcess, accessing_proc_stats_works)
{
auto child = core::posix::fork(
[](){ while(true); return core::posix::exit::Status::success;},
core::posix::StandardStream::empty);
core::posix::linux::proc::process::Stat stat;
EXPECT_NO_THROW(child >> stat);
ASSERT_EQ(core::posix::linux::proc::process::State::running, stat.state);
}
TEST(LinuxProcess, accessing_proc_oom_score_works)
{
core::posix::linux::proc::process::OomScore oom_score;
EXPECT_NO_THROW(core::posix::this_process::instance() >> oom_score);
}
TEST(LinuxProcess, accessing_proc_oom_score_adj_works)
{
core::posix::linux::proc::process::OomScoreAdj oom_score_adj;
EXPECT_NO_THROW(core::posix::this_process::instance() >> oom_score_adj);
}
TEST(LinuxProcess, adjusting_proc_oom_score_adj_works)
{
core::posix::linux::proc::process::OomScoreAdj oom_score_adj
{
core::posix::linux::proc::process::OomScoreAdj::max_value()
};
EXPECT_NO_THROW(core::posix::this_process::instance() << oom_score_adj);
EXPECT_NO_THROW(core::posix::this_process::instance() >> oom_score_adj);
EXPECT_EQ(core::posix::linux::proc::process::OomScoreAdj::max_value(),
oom_score_adj.value);
}
// For this test we assume that we are not privileged and that the test binary
// does not have CAP_SYS_RESOURCE capabilities.
TEST(LinuxProcess, adjusting_proc_oom_score_adj_to_privileged_values_only_works_if_root)
{
core::posix::linux::proc::process::OomScoreAdj oom_score_adj
{
core::posix::linux::proc::process::OomScoreAdj::min_value()
};
EXPECT_NO_THROW(core::posix::this_process::instance() << oom_score_adj);
EXPECT_NO_THROW(core::posix::this_process::instance() >> oom_score_adj);
// If we are running on virtualized builders or buildds we are running under a fakeroot environment.
// However, that environment does not give us the required privileges and capabilities to adjust OOM values
// as we like. At any rate, this check seems to be flaky and we just comment it out.
// EXPECT_NE(core::posix::linux::proc::process::OomScoreAdj::min_value(),
// oom_score_adj.value);
}
TEST(LinuxProcess, trying_to_write_an_invalid_oom_score_adj_throws)
{
core::posix::linux::proc::process::OomScoreAdj invalid_adj
{
core::posix::linux::proc::process::OomScoreAdj::min_value() -1000
};
EXPECT_ANY_THROW(core::posix::this_process::instance() << invalid_adj);
}
TEST(LinuxProcess, adjusting_proc_oom_adj_works)
{
core::posix::linux::proc::process::OomAdj oom_adj
{
core::posix::linux::proc::process::OomAdj::max_value()
};
EXPECT_NO_THROW(core::posix::this_process::instance() << oom_adj);
EXPECT_NO_THROW(core::posix::this_process::instance() >> oom_adj);
EXPECT_EQ(core::posix::linux::proc::process::OomAdj::max_value(),
oom_adj.value);
}
// For this test we assume that we are not privileged and that the test binary
// does not have CAP_SYS_RESOURCE capabilities.
TEST(LinuxProcess, adjusting_proc_oom_adj_to_privileged_values_does_not_work)
{
core::posix::linux::proc::process::OomAdj oom_adj
{
core::posix::linux::proc::process::OomAdj::min_value()
};
EXPECT_NO_THROW(core::posix::this_process::instance() << oom_adj);
EXPECT_NO_THROW(core::posix::this_process::instance() >> oom_adj);
// If we are running on virtualized builders or buildds we are running under a fakeroot environment.
// However, that environment does not give us the required privileges and capabilities to adjust OOM values
// as we like. At any rate, this check seems to be flaky and we just comment it out.
// EXPECT_NE(core::posix::linux::proc::process::OomAdj::min_value(),
// oom_adj.value);
}
TEST(LinuxProcess, trying_to_write_an_invalid_oom_adj_throws)
{
core::posix::linux::proc::process::OomAdj invalid_adj
{
core::posix::linux::proc::process::OomAdj::min_value() - 1000
};
EXPECT_ANY_THROW(core::posix::this_process::instance() << invalid_adj);
}
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