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util_test.cc
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// Copyright 2019 The Chromium OS Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include <limits>
#include <string>
#include <gmock/gmock.h>
#include <gtest/gtest.h>
#include <base/strings/string_number_conversions.h>
#include <base/strings/stringprintf.h>
#include <base/files/scoped_temp_dir.h>
#include <base/files/file_util.h>
#include <brillo/file_utils.h>
#include "ml/test_utils.h"
#include "ml/util.h"
namespace ml {
namespace {
// Represents a temp status file valid for the lifetime of this object.
// The constructor creates a temp file named "status" in a temp folder and
// writes `content` to that file.
// Use GetPath() to obtain the path fo the temporary file.
class ScopedTempStatusFile {
public:
explicit ScopedTempStatusFile(const std::string& content) {
CHECK(dir_.CreateUniqueTempDir());
file_path_ = dir_.GetPath().Append("status");
CHECK(brillo::WriteStringToFile(file_path_, content));
}
ScopedTempStatusFile(const ScopedTempStatusFile&) = delete;
ScopedTempStatusFile& operator=(const ScopedTempStatusFile&) = delete;
base::FilePath GetPath() { return file_path_; }
private:
base::ScopedTempDir dir_;
base::FilePath file_path_;
};
// Status file does not exist.
TEST(GetProcessMemoryUsageTest, InvalidFile) {
ScopedTempStatusFile status_file("");
MemoryUsage memory_usage;
EXPECT_FALSE(GetProcessMemoryUsageFromFile(
&memory_usage, status_file.GetPath().Append("nonexistfile")));
}
TEST(GetProcessMemoryUsageTest, EmptyFile) {
ScopedTempStatusFile status_file("");
MemoryUsage memory_usage;
EXPECT_FALSE(
GetProcessMemoryUsageFromFile(&memory_usage, status_file.GetPath()));
}
TEST(GetProcessMemoryUsageTest, MissingVmSwap) {
ScopedTempStatusFile status_file("VmRSS: 3235 kB");
MemoryUsage memory_usage;
EXPECT_FALSE(
GetProcessMemoryUsageFromFile(&memory_usage, status_file.GetPath()));
}
TEST(GetProcessMemoryUsageTest, MissingVmRSS) {
ScopedTempStatusFile status_file("VmSwap: 34213 kB");
MemoryUsage memory_usage;
EXPECT_FALSE(
GetProcessMemoryUsageFromFile(&memory_usage, status_file.GetPath()));
}
TEST(GetProcessMemoryUsageTest, MissingBothValues) {
ScopedTempStatusFile status_file("VmRSS: kB \n VmSwap: kB\n");
MemoryUsage memory_usage;
EXPECT_FALSE(
GetProcessMemoryUsageFromFile(&memory_usage, status_file.GetPath()));
}
TEST(GetProcessMemoryUsageTest, MissingVmRSSValue) {
ScopedTempStatusFile status_file("VmRSS: kB \n VmSwap: 421532 kB\n");
MemoryUsage memory_usage;
EXPECT_FALSE(
GetProcessMemoryUsageFromFile(&memory_usage, status_file.GetPath()));
}
TEST(GetProcessMemoryUsageTest, MissingVmSwapValue) {
ScopedTempStatusFile status_file("VmRSS: 32432 kB \n VmSwap: kB\n");
MemoryUsage memory_usage;
EXPECT_FALSE(
GetProcessMemoryUsageFromFile(&memory_usage, status_file.GetPath()));
}
TEST(GetProcessMemoryUsageTest, InvalidVmSwapValueNan) {
ScopedTempStatusFile status_file(
"VmRSS: 767234322 kB \n VmSwap: nan kB\n");
MemoryUsage memory_usage;
EXPECT_FALSE(
GetProcessMemoryUsageFromFile(&memory_usage, status_file.GetPath()));
}
TEST(GetProcessMemoryUsageTest, InvalidVmRSSValueNan) {
ScopedTempStatusFile status_file("VmRSS: nan kB \n VmSwap: 4214 kB\n");
MemoryUsage memory_usage;
EXPECT_FALSE(
GetProcessMemoryUsageFromFile(&memory_usage, status_file.GetPath()));
}
TEST(GetProcessMemoryUsageTest, Duplicate) {
ScopedTempStatusFile status_file(
"VmRSS: 432 kB \n VmSwap: 421532 kB\n"
"VmRSS: 432 kB \n VmSwap: 421532 kB\n");
MemoryUsage memory_usage;
EXPECT_FALSE(
GetProcessMemoryUsageFromFile(&memory_usage, status_file.GetPath()));
}
TEST(GetProcessMemoryUsageTest, ValidInputNonZeroValue) {
ScopedTempStatusFile status_file("VmRSS: 432 kB \n VmSwap: 421532 kB\n");
MemoryUsage memory_usage;
EXPECT_TRUE(
GetProcessMemoryUsageFromFile(&memory_usage, status_file.GetPath()));
EXPECT_EQ(memory_usage.VmRSSKb, 432);
EXPECT_EQ(memory_usage.VmSwapKb, 421532);
}
TEST(GetProcessMemoryUsageTest, ValidInputZeroValue) {
ScopedTempStatusFile status_file("VmRSS: 0 kB \n VmSwap: 0 kB\n");
MemoryUsage memory_usage;
EXPECT_TRUE(
GetProcessMemoryUsageFromFile(&memory_usage, status_file.GetPath()));
EXPECT_EQ(memory_usage.VmRSSKb, 0);
EXPECT_EQ(memory_usage.VmSwapKb, 0);
}
TEST(GetProcessMemoryUsageTest, ValidInputZeroLead) {
ScopedTempStatusFile status_file(
"VmRSS: 0242 kB \n VmSwap: 03523 kB\n");
MemoryUsage memory_usage;
EXPECT_TRUE(
GetProcessMemoryUsageFromFile(&memory_usage, status_file.GetPath()));
EXPECT_EQ(memory_usage.VmRSSKb, 242);
EXPECT_EQ(memory_usage.VmSwapKb, 3523);
}
// Checks the maximum value of size_t. It may fail if treated as int32.
TEST(GetProcessMemoryUsageTest, ValidInputMaxSizeT) {
constexpr size_t kSizeTMax = std::numeric_limits<size_t>::max();
ScopedTempStatusFile status_file(base::StringPrintf(
"VmRSS: %zu kB\nVmSwap: %zu kB\n", kSizeTMax, kSizeTMax));
MemoryUsage memory_usage;
EXPECT_TRUE(
GetProcessMemoryUsageFromFile(&memory_usage, status_file.GetPath()));
EXPECT_EQ(memory_usage.VmRSSKb, kSizeTMax);
EXPECT_EQ(memory_usage.VmSwapKb, kSizeTMax);
}
TEST(GetProcessMemoryUsageTest, OrderChanged) {
ScopedTempStatusFile status_file(
"VmSwap: 34 kB\nVmRSS: 123 kB\n");
MemoryUsage memory_usage;
EXPECT_TRUE(
GetProcessMemoryUsageFromFile(&memory_usage, status_file.GetPath()));
EXPECT_EQ(memory_usage.VmRSSKb, 123);
EXPECT_EQ(memory_usage.VmSwapKb, 34);
}
TEST(GetProcessMemoryUsageTest, MissingNonMemoryValue) {
ScopedTempStatusFile status_file(
"VmSize: \nVmSwap: 34 kB\nVmRSS: 123 kB\n");
MemoryUsage memory_usage;
EXPECT_TRUE(
GetProcessMemoryUsageFromFile(&memory_usage, status_file.GetPath()));
EXPECT_EQ(memory_usage.VmRSSKb, 123);
EXPECT_EQ(memory_usage.VmSwapKb, 34);
}
TEST(GetProcessMemoryUsageTest, RealisticProcStatus) {
ScopedTempStatusFile status_file(
"Name: cat\n"
"Umask: 0022\n"
"State: R (running)\n"
"Tgid: 21255\n"
"Ngid: 0\n"
"Pid: 21255\n"
"PPid: 7\n"
"TracerPid: 0\n"
"Uid: 694971 694971 694971 694971\n"
"Gid: 89939 89939 89939 89939\n"
"FDSize: 256\n"
"Groups: 4 11 18 19 20 27 250 89939\n"
"NStgid: 21255\n"
"NSpid: 21255\n"
"NSpgid: 21255\n"
"NSsid: 0\n"
"VmPeak: 6048 kB\n"
"VmSize: 6048 kB\n"
"VmLck: 0 kB\n"
"VmPin: 0 kB\n"
"VmHWM: 732 kB\n"
"VmRSS: 732 kB\n"
"RssAnon: 68 kB\n"
"RssFile: 664 kB\n"
"RssShmem: 0 kB\n"
"VmData: 312 kB\n"
"VmStk: 136 kB\n"
"VmExe: 40 kB\n"
"VmLib: 1872 kB\n"
"VmPTE: 52 kB\n"
"VmSwap: 321 kB\n"
"HugetlbPages: 0 kB\n"
"CoreDumping: 0\n"
"Threads: 1\n"
"SigQ: 0/767737\n"
"SigPnd: 0000000000000000\n"
"ShdPnd: 0000000000000000\n"
"SigBlk: 0000000000000000\n"
"SigIgn: 0000000001001000\n"
"SigCgt: 0000000000000000\n"
"CapInh: 0000000000000000\n"
"CapPrm: 0000000000000000\n"
"CapEff: 0000000000000000\n"
"CapBnd: 0000003fffffffff\n"
"CapAmb: 0000000000000000\n"
"NoNewPrivs: 0\n"
"Seccomp: 0\n"
"Speculation_Store_Bypass: thread vulnerable\n"
"Cpus_allowed: ff,ffffffff,ffffffff\n"
"Cpus_allowed_list: 0-71\n"
"Mems_allowed: 00000000,00000003\n"
"Mems_allowed_list: 0-1\n"
"voluntary_ctxt_switches: 0\n"
"nonvoluntary_ctxt_switches: 1\n");
MemoryUsage memory_usage;
EXPECT_TRUE(
GetProcessMemoryUsageFromFile(&memory_usage, status_file.GetPath()));
EXPECT_EQ(memory_usage.VmRSSKb, 732);
EXPECT_EQ(memory_usage.VmSwapKb, 321);
}
} // namespace
} // namespace ml