1// Copyright (c) 2009 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/eintr_wrapper.h"
14#include "base/file_path.h"
15#include "base/logging.h"
16#include "base/process_util.h"
17
18#include "testing/gtest/include/gtest/gtest.h"
19
20typedef testing::Test ProcessInfoSnapshotMacTest;
21
22TEST_F(ProcessInfoSnapshotMacTest, FindPidOneTest) {
23  // Sample process with PID 1, which should exist and presumably belong to
24  // root.
25  std::vector<base::ProcessId> pid_list;
26  pid_list.push_back(1);
27  ProcessInfoSnapshot snapshot;
28  ASSERT_TRUE(snapshot.Sample(pid_list));
29
30  ProcessInfoSnapshot::ProcInfoEntry proc_info;
31  ASSERT_TRUE(snapshot.GetProcInfo(1, &proc_info));
32  EXPECT_EQ(1, static_cast<int64>(proc_info.pid));
33  EXPECT_EQ(0, static_cast<int64>(proc_info.ppid));
34  EXPECT_EQ(0, static_cast<int64>(proc_info.uid));
35  EXPECT_EQ(0, static_cast<int64>(proc_info.euid));
36  EXPECT_GE(proc_info.rss, 0u);
37  EXPECT_GT(proc_info.vsize, 0u);
38
39  // Try out the |Get...OfPID()|, but don't examine the results, since they
40  // depend on how we map |ProcInfoEntry| to |...KBytes|.
41  base::CommittedKBytes usage;
42  EXPECT_TRUE(snapshot.GetCommittedKBytesOfPID(1, &usage));
43  base::WorkingSetKBytes ws_usage;
44  EXPECT_TRUE(snapshot.GetWorkingSetKBytesOfPID(1, &ws_usage));
45
46  // Make sure it hasn't picked up some other PID (say, 2).
47  EXPECT_FALSE(snapshot.GetProcInfo(2, &proc_info));
48
49  // Make sure PID 2 still isn't there (in case I mess up my use of std::map).
50  EXPECT_FALSE(snapshot.GetProcInfo(2, &proc_info));
51
52  // Test |Reset()|.
53  snapshot.Reset();
54  EXPECT_FALSE(snapshot.GetProcInfo(1, &proc_info));
55}
56
57TEST_F(ProcessInfoSnapshotMacTest, FindPidSelfTest) {
58  // Sample this process and its parent.
59  base::ProcessId pid = static_cast<base::ProcessId>(getpid());
60  base::ProcessId ppid = static_cast<base::ProcessId>(getppid());
61  uid_t uid = getuid();
62  uid_t euid = geteuid();
63  EXPECT_NE(static_cast<int64>(ppid), 0);
64
65  std::vector<base::ProcessId> pid_list;
66  pid_list.push_back(pid);
67  pid_list.push_back(ppid);
68  ProcessInfoSnapshot snapshot;
69  ASSERT_TRUE(snapshot.Sample(pid_list));
70
71  // Find our process.
72  ProcessInfoSnapshot::ProcInfoEntry proc_info;
73  ASSERT_TRUE(snapshot.GetProcInfo(pid, &proc_info));
74  EXPECT_EQ(pid, proc_info.pid);
75  EXPECT_EQ(ppid, proc_info.ppid);
76  EXPECT_EQ(uid, proc_info.uid);
77  EXPECT_EQ(euid, proc_info.euid);
78  EXPECT_GE(proc_info.rss, 100u);     // Sanity check: we're running, so we
79                                      // should occupy at least 100 kilobytes.
80  EXPECT_GE(proc_info.vsize, 1024u);  // Sanity check: our |vsize| is presumably
81                                      // at least a megabyte.
82  EXPECT_GE(proc_info.rshrd, 1024u);  // Shared memory should also > 1 MB.
83  EXPECT_GE(proc_info.rprvt, 1024u);  // Same with private memory.
84
85  // Find our parent.
86  ASSERT_TRUE(snapshot.GetProcInfo(ppid, &proc_info));
87  EXPECT_EQ(ppid, proc_info.pid);
88  EXPECT_NE(static_cast<int64>(proc_info.ppid), 0);
89  EXPECT_EQ(uid, proc_info.uid);    // This (and the following) should be true
90  EXPECT_EQ(euid, proc_info.euid);  // under reasonable circumstances.
91  // Can't say anything definite about its |rss|.
92  EXPECT_GT(proc_info.vsize, 0u);   // Its |vsize| should be nonzero though.
93}
94
95// To verify that ProcessInfoSnapshot is getting the actual uid and effective
96// uid, this test runs top. top should have a uid of the caller and effective
97// uid of 0 (root).
98TEST_F(ProcessInfoSnapshotMacTest, EffectiveVsRealUserIDTest) {
99  // Create a pipe to be able to read top's output.
100  int fds[2];
101  PCHECK(pipe(fds) == 0);
102  base::file_handle_mapping_vector fds_to_remap;
103  fds_to_remap.push_back(std::make_pair(fds[1], 1));
104
105  // Hook up top's stderr to the test process' stderr.
106  fds_to_remap.push_back(std::make_pair(fileno(stderr), 2));
107
108  std::vector<std::string> argv;
109  argv.push_back("/usr/bin/top");
110  argv.push_back("-l");
111  argv.push_back("0");
112
113  base::ProcessHandle process_handle;
114  ASSERT_TRUE(base::LaunchApp(argv, fds_to_remap, false, &process_handle));
115  PCHECK(HANDLE_EINTR(close(fds[1])) == 0);
116
117  // Wait until there's some output form top. This is an easy way to tell that
118  // the exec() call is done and top is actually running.
119  char buf[1];
120  PCHECK(HANDLE_EINTR(read(fds[0], buf, 1)) == 1);
121
122  std::vector<base::ProcessId> pid_list;
123  pid_list.push_back(process_handle);
124  ProcessInfoSnapshot snapshot;
125  ASSERT_TRUE(snapshot.Sample(pid_list));
126
127  ProcessInfoSnapshot::ProcInfoEntry proc_info;
128  ASSERT_TRUE(snapshot.GetProcInfo(process_handle, &proc_info));
129  // Effective user ID should be 0 (root).
130  EXPECT_EQ(proc_info.euid, 0u);
131  // Real user ID should match the calling process's user id.
132  EXPECT_EQ(proc_info.uid, geteuid());
133
134  ASSERT_TRUE(base::KillProcess(process_handle, 0, true));
135  PCHECK(HANDLE_EINTR(close(fds[0])) == 0);
136}
137