chrome/browser/process_info_snapshot_mac_unittest.cc

   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_util.h"
  17
  18 #include "testing/gtest/include/gtest/gtest.h"
  19
  20 typedef testing::Test ProcessInfoSnapshotMacTest;
  21
  22 TEST_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
  57 TEST_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).
  98 TEST_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::FileHandleMappingVector 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   base::LaunchOptions options;
 115   options.fds_to_remap = &fds_to_remap;
 116   ASSERT_TRUE(base::LaunchProcess(argv, options, &process_handle));
 117   PCHECK(HANDLE_EINTR(close(fds[1])) == 0);
 118
 119   // Wait until there's some output form top. This is an easy way to tell that
 120   // the exec() call is done and top is actually running.
 121   char buf[1];
 122   PCHECK(HANDLE_EINTR(read(fds[0], buf, 1)) == 1);
 123
 124   std::vector<base::ProcessId> pid_list;
 125   pid_list.push_back(process_handle);
 126   ProcessInfoSnapshot snapshot;
 127   ASSERT_TRUE(snapshot.Sample(pid_list));
 128
 129   ProcessInfoSnapshot::ProcInfoEntry proc_info;
 130   ASSERT_TRUE(snapshot.GetProcInfo(process_handle, &proc_info));
 131   // Effective user ID should be 0 (root).
 132   EXPECT_EQ(proc_info.euid, 0u);
 133   // Real user ID should match the calling process's user id.
 134   EXPECT_EQ(proc_info.uid, geteuid());
 135
 136   ASSERT_TRUE(base::KillProcess(process_handle, 0, true));
 137   PCHECK(HANDLE_EINTR(close(fds[0])) == 0);
 138 }