1// Copyright (c) 2012 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#include "chrome/browser/process_info_snapshot.h"
6
7#include <sys/types.h>  // For |uid_t| (and |pid_t|).
8#include <unistd.h>  // For |getpid()|, |getuid()|, etc.
9
10#include <vector>
11
12#include "base/command_line.h"
13#include "base/files/file_path.h"
14#include "base/logging.h"
15#include "base/posix/eintr_wrapper.h"
16#include "base/process/kill.h"
17#include "base/process/launch.h"
18#include "base/process/process_handle.h"
19#include "base/process/process_metrics.h"
20#include "testing/gtest/include/gtest/gtest.h"
21
22typedef testing::Test ProcessInfoSnapshotMacTest;
23
24TEST_F(ProcessInfoSnapshotMacTest, FindPidOneTest) {
25  // Sample process with PID 1, which should exist and presumably belong to
26  // root.
27  std::vector<base::ProcessId> pid_list;
28  pid_list.push_back(1);
29  ProcessInfoSnapshot snapshot;
30  ASSERT_TRUE(snapshot.Sample(pid_list));
31
32  ProcessInfoSnapshot::ProcInfoEntry proc_info;
33  ASSERT_TRUE(snapshot.GetProcInfo(1, &proc_info));
34  EXPECT_EQ(1, static_cast<int64>(proc_info.pid));
35  EXPECT_EQ(0, static_cast<int64>(proc_info.ppid));
36  EXPECT_EQ(0, static_cast<int64>(proc_info.uid));
37  EXPECT_EQ(0, static_cast<int64>(proc_info.euid));
38  EXPECT_GE(proc_info.rss, 0u);
39  EXPECT_GT(proc_info.vsize, 0u);
40
41  // Try out the |Get...OfPID()|, but don't examine the results, since they
42  // depend on how we map |ProcInfoEntry| to |...KBytes|.
43  base::CommittedKBytes usage;
44  EXPECT_TRUE(snapshot.GetCommittedKBytesOfPID(1, &usage));
45  base::WorkingSetKBytes ws_usage;
46  EXPECT_TRUE(snapshot.GetWorkingSetKBytesOfPID(1, &ws_usage));
47
48  // Make sure it hasn't picked up some other PID (say, 2).
49  EXPECT_FALSE(snapshot.GetProcInfo(2, &proc_info));
50
51  // Make sure PID 2 still isn't there (in case I mess up my use of std::map).
52  EXPECT_FALSE(snapshot.GetProcInfo(2, &proc_info));
53
54  // Test |Reset()|.
55  snapshot.Reset();
56  EXPECT_FALSE(snapshot.GetProcInfo(1, &proc_info));
57}
58
59TEST_F(ProcessInfoSnapshotMacTest, FindPidSelfTest) {
60  // Sample this process and its parent.
61  base::ProcessId pid = static_cast<base::ProcessId>(getpid());
62  base::ProcessId ppid = static_cast<base::ProcessId>(getppid());
63  uid_t uid = getuid();
64  uid_t euid = geteuid();
65  EXPECT_NE(static_cast<int64>(ppid), 0);
66
67  std::vector<base::ProcessId> pid_list;
68  pid_list.push_back(pid);
69  pid_list.push_back(ppid);
70  ProcessInfoSnapshot snapshot;
71  ASSERT_TRUE(snapshot.Sample(pid_list));
72
73  // Find our process.
74  ProcessInfoSnapshot::ProcInfoEntry proc_info;
75  ASSERT_TRUE(snapshot.GetProcInfo(pid, &proc_info));
76  EXPECT_EQ(pid, proc_info.pid);
77  EXPECT_EQ(ppid, proc_info.ppid);
78  EXPECT_EQ(uid, proc_info.uid);
79  EXPECT_EQ(euid, proc_info.euid);
80  EXPECT_GE(proc_info.rss, 100u);     // Sanity check: we're running, so we
81                                      // should occupy at least 100 kilobytes.
82  EXPECT_GE(proc_info.vsize, 1024u);  // Sanity check: our |vsize| is presumably
83                                      // at least a megabyte.
84  EXPECT_GE(proc_info.rshrd, 1024u);  // Shared memory should also > 1 MB.
85  EXPECT_GE(proc_info.rprvt, 1024u);  // Same with private memory.
86
87  // Find our parent.
88  ASSERT_TRUE(snapshot.GetProcInfo(ppid, &proc_info));
89  EXPECT_EQ(ppid, proc_info.pid);
90  EXPECT_NE(static_cast<int64>(proc_info.ppid), 0);
91  EXPECT_EQ(uid, proc_info.uid);    // This (and the following) should be true
92  EXPECT_EQ(euid, proc_info.euid);  // under reasonable circumstances.
93  // Can't say anything definite about its |rss|.
94  EXPECT_GT(proc_info.vsize, 0u);   // Its |vsize| should be nonzero though.
95}
96
97// To verify that ProcessInfoSnapshot is getting the actual uid and effective
98// uid, this test runs top. top should have a uid of the caller and effective
99// uid of 0 (root).
100TEST_F(ProcessInfoSnapshotMacTest, EffectiveVsRealUserIDTest) {
101  // Create a pipe to be able to read top's output.
102  int fds[2];
103  PCHECK(pipe(fds) == 0);
104  base::FileHandleMappingVector fds_to_remap;
105  fds_to_remap.push_back(std::make_pair(fds[1], 1));
106
107  // Hook up top's stderr to the test process' stderr.
108  fds_to_remap.push_back(std::make_pair(fileno(stderr), 2));
109
110  std::vector<std::string> argv;
111  argv.push_back("/usr/bin/top");
112  argv.push_back("-l");
113  argv.push_back("0");
114
115  base::ProcessHandle process_handle;
116  base::LaunchOptions options;
117  options.fds_to_remap = &fds_to_remap;
118  ASSERT_TRUE(base::LaunchProcess(argv, options, &process_handle));
119  PCHECK(IGNORE_EINTR(close(fds[1])) == 0);
120
121  // Wait until there's some output form top. This is an easy way to tell that
122  // the exec() call is done and top is actually running.
123  char buf[1];
124  PCHECK(HANDLE_EINTR(read(fds[0], buf, 1)) == 1);
125
126  std::vector<base::ProcessId> pid_list;
127  pid_list.push_back(process_handle);
128  ProcessInfoSnapshot snapshot;
129  ASSERT_TRUE(snapshot.Sample(pid_list));
130
131  ProcessInfoSnapshot::ProcInfoEntry proc_info;
132  ASSERT_TRUE(snapshot.GetProcInfo(process_handle, &proc_info));
133  // Effective user ID should be 0 (root).
134  EXPECT_EQ(proc_info.euid, 0u);
135  // Real user ID should match the calling process's user id.
136  EXPECT_EQ(proc_info.uid, geteuid());
137
138  ASSERT_TRUE(base::KillProcess(process_handle, 0, true));
139  PCHECK(IGNORE_EINTR(close(fds[0])) == 0);
140}
141