5756f0c937
Android S requires devices to support eBPF. Test: builds, atest, TreeHugger Bug: 167500195 Signed-off-by: Maciej Żenczykowski <maze@google.com> Change-Id: I62fb97f79103515f5a2fd531cfa36356d21a4a6f
91 lines
2.6 KiB
C++
91 lines
2.6 KiB
C++
/*
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* Copyright (C) 2018 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <android-base/macros.h>
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#include <gtest/gtest.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <iostream>
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#include "include/bpf/BpfMap.h"
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#include "include/bpf/BpfUtils.h"
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#include "include/libbpf_android.h"
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using ::testing::Test;
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constexpr const char tp_prog_path[] =
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"/sys/fs/bpf/prog_bpf_load_tp_prog_tracepoint_sched_sched_switch";
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constexpr const char tp_map_path[] = "/sys/fs/bpf/map_bpf_load_tp_prog_cpu_pid_map";
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namespace android {
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namespace bpf {
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class BpfLoadTest : public testing::Test {
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protected:
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BpfLoadTest() {}
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int mProgFd;
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void SetUp() {
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unlink(tp_prog_path);
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unlink(tp_map_path);
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bool critical = true;
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EXPECT_EQ(android::bpf::loadProg("/system/etc/bpf/bpf_load_tp_prog.o", &critical), 0);
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EXPECT_EQ(false, critical);
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mProgFd = bpf_obj_get(tp_prog_path);
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EXPECT_GT(mProgFd, 0);
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int ret = bpf_attach_tracepoint(mProgFd, "sched", "sched_switch");
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EXPECT_NE(ret, 0);
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}
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void TearDown() {
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close(mProgFd);
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unlink(tp_prog_path);
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unlink(tp_map_path);
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}
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void checkMapNonZero() {
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// The test program installs a tracepoint on sched:sched_switch
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// and expects the kernel to populate a PID corresponding to CPU
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android::bpf::BpfMap<uint32_t, uint32_t> m(tp_map_path);
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// Wait for program to run a little
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sleep(1);
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int non_zero = 0;
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const auto iterFunc = [&non_zero](const uint32_t& key, const uint32_t& val,
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BpfMap<uint32_t, uint32_t>& map) {
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if (val && !non_zero) {
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non_zero = 1;
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}
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UNUSED(key);
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UNUSED(map);
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return base::Result<void>();
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};
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EXPECT_RESULT_OK(m.iterateWithValue(iterFunc));
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EXPECT_EQ(non_zero, 1);
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}
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};
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TEST_F(BpfLoadTest, bpfCheckMap) {
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checkMapNonZero();
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}
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} // namespace bpf
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} // namespace android
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