src/base/process/process_util_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 #define _CRT_SECURE_NO_WARNINGS
   6
   7 #include <limits>
   8
   9 #include "base/command_line.h"
  10 #include "base/debug/alias.h"
  11 #include "base/debug/stack_trace.h"
  12 #include "base/files/file_path.h"
  13 #include "base/logging.h"
  14 #include "base/memory/scoped_ptr.h"
  15 #include "base/path_service.h"
  16 #include "base/posix/eintr_wrapper.h"
  17 #include "base/process/kill.h"
  18 #include "base/process/launch.h"
  19 #include "base/process/memory.h"
  20 #include "base/process/process.h"
  21 #include "base/process/process_metrics.h"
  22 #include "base/strings/string_number_conversions.h"
  23 #include "base/strings/utf_string_conversions.h"
  24 #include "base/synchronization/waitable_event.h"
  25 #include "base/test/multiprocess_test.h"
  26 #include "base/test/test_timeouts.h"
  27 #include "base/third_party/dynamic_annotations/dynamic_annotations.h"
  28 #include "base/threading/platform_thread.h"
  29 #include "base/threading/thread.h"
  30 #include "testing/gtest/include/gtest/gtest.h"
  31 #include "testing/multiprocess_func_list.h"
  32
  33 #if defined(OS_LINUX)
  34 #include <malloc.h>
  35 #include <sched.h>
  36 #endif
  37 #if defined(OS_POSIX)
  38 #include <dlfcn.h>
  39 #include <errno.h>
  40 #include <fcntl.h>
  41 #include <signal.h>
  42 #include <sys/resource.h>
  43 #include <sys/socket.h>
  44 #include <sys/wait.h>
  45 #endif
  46 #if defined(OS_WIN)
  47 #include <windows.h>
  48 #include "base/win/windows_version.h"
  49 #endif
  50 #if defined(OS_MACOSX)
  51 #include <mach/vm_param.h>
  52 #include <malloc/malloc.h>
  53 #endif
  54
  55 using base::FilePath;
  56
  57 namespace {
  58
  59 #if defined(OS_ANDROID)
  60 const char kShellPath[] = "/system/bin/sh";
  61 const char kPosixShell[] = "sh";
  62 #else
  63 const char kShellPath[] = "/bin/sh";
  64 const char kPosixShell[] = "bash";
  65 #endif
  66
  67 const char kSignalFileSlow[] = "SlowChildProcess.die";
  68 const char kSignalFileKill[] = "KilledChildProcess.die";
  69
  70 #if defined(OS_WIN)
  71 const int kExpectedStillRunningExitCode = 0x102;
  72 const int kExpectedKilledExitCode = 1;
  73 #else
  74 const int kExpectedStillRunningExitCode = 0;
  75 #endif
  76
  77 // Sleeps until file filename is created.
  78 void WaitToDie(const char* filename) {
  79   FILE* fp;
  80   do {
  81     base::PlatformThread::Sleep(base::TimeDelta::FromMilliseconds(10));
  82     fp = fopen(filename, "r");
  83   } while (!fp);
  84   fclose(fp);
  85 }
  86
  87 // Signals children they should die now.
  88 void SignalChildren(const char* filename) {
  89   FILE* fp = fopen(filename, "w");
  90   fclose(fp);
  91 }
  92
  93 // Using a pipe to the child to wait for an event was considered, but
  94 // there were cases in the past where pipes caused problems (other
  95 // libraries closing the fds, child deadlocking). This is a simple
  96 // case, so it's not worth the risk.  Using wait loops is discouraged
  97 // in most instances.
  98 base::TerminationStatus WaitForChildTermination(base::ProcessHandle handle,
  99                                                 int* exit_code) {
 100   // Now we wait until the result is something other than STILL_RUNNING.
 101   base::TerminationStatus status = base::TERMINATION_STATUS_STILL_RUNNING;
 102   const base::TimeDelta kInterval = base::TimeDelta::FromMilliseconds(20);
 103   base::TimeDelta waited;
 104   do {
 105     status = base::GetTerminationStatus(handle, exit_code);
 106     base::PlatformThread::Sleep(kInterval);
 107     waited += kInterval;
 108   } while (status == base::TERMINATION_STATUS_STILL_RUNNING &&
 109 // Waiting for more time for process termination on android devices.
 110 #if defined(OS_ANDROID)
 111            waited < TestTimeouts::large_test_timeout());
 112 #else
 113            waited < TestTimeouts::action_max_timeout());
 114 #endif
 115
 116   return status;
 117 }
 118
 119 }  // namespace
 120
 121 class ProcessUtilTest : public base::MultiProcessTest {
 122  public:
 123 #if defined(OS_POSIX)
 124   // Spawn a child process that counts how many file descriptors are open.
 125   int CountOpenFDsInChild();
 126 #endif
 127   // Converts the filename to a platform specific filepath.
 128   // On Android files can not be created in arbitrary directories.
 129   static std::string GetSignalFilePath(const char* filename);
 130 };
 131
 132 std::string ProcessUtilTest::GetSignalFilePath(const char* filename) {
 133 #if !defined(OS_ANDROID)
 134   return filename;
 135 #else
 136   FilePath tmp_dir;
 137   PathService::Get(base::DIR_CACHE, &tmp_dir);
 138   tmp_dir = tmp_dir.Append(filename);
 139   return tmp_dir.value();
 140 #endif
 141 }
 142
 143 MULTIPROCESS_TEST_MAIN(SimpleChildProcess) {
 144   return 0;
 145 }
 146
 147 // TODO(viettrungluu): This should be in a "MultiProcessTestTest".
 148 TEST_F(ProcessUtilTest, SpawnChild) {
 149   base::ProcessHandle handle = SpawnChild("SimpleChildProcess");
 150   ASSERT_NE(base::kNullProcessHandle, handle);
 151   EXPECT_TRUE(base::WaitForSingleProcess(
 152                   handle, TestTimeouts::action_max_timeout()));
 153   base::CloseProcessHandle(handle);
 154 }
 155
 156 MULTIPROCESS_TEST_MAIN(SlowChildProcess) {
 157   WaitToDie(ProcessUtilTest::GetSignalFilePath(kSignalFileSlow).c_str());
 158   return 0;
 159 }
 160
 161 TEST_F(ProcessUtilTest, KillSlowChild) {
 162   const std::string signal_file =
 163       ProcessUtilTest::GetSignalFilePath(kSignalFileSlow);
 164   remove(signal_file.c_str());
 165   base::ProcessHandle handle = SpawnChild("SlowChildProcess");
 166   ASSERT_NE(base::kNullProcessHandle, handle);
 167   SignalChildren(signal_file.c_str());
 168   EXPECT_TRUE(base::WaitForSingleProcess(
 169                   handle, TestTimeouts::action_max_timeout()));
 170   base::CloseProcessHandle(handle);
 171   remove(signal_file.c_str());
 172 }
 173
 174 // Times out on Linux and Win, flakes on other platforms, http://crbug.com/95058
 175 TEST_F(ProcessUtilTest, DISABLED_GetTerminationStatusExit) {
 176   const std::string signal_file =
 177       ProcessUtilTest::GetSignalFilePath(kSignalFileSlow);
 178   remove(signal_file.c_str());
 179   base::ProcessHandle handle = SpawnChild("SlowChildProcess");
 180   ASSERT_NE(base::kNullProcessHandle, handle);
 181
 182   int exit_code = 42;
 183   EXPECT_EQ(base::TERMINATION_STATUS_STILL_RUNNING,
 184             base::GetTerminationStatus(handle, &exit_code));
 185   EXPECT_EQ(kExpectedStillRunningExitCode, exit_code);
 186
 187   SignalChildren(signal_file.c_str());
 188   exit_code = 42;
 189   base::TerminationStatus status =
 190       WaitForChildTermination(handle, &exit_code);
 191   EXPECT_EQ(base::TERMINATION_STATUS_NORMAL_TERMINATION, status);
 192   EXPECT_EQ(0, exit_code);
 193   base::CloseProcessHandle(handle);
 194   remove(signal_file.c_str());
 195 }
 196
 197 #if defined(OS_WIN)
 198 // TODO(cpu): figure out how to test this in other platforms.
 199 TEST_F(ProcessUtilTest, GetProcId) {
 200   base::ProcessId id1 = base::GetProcId(GetCurrentProcess());
 201   EXPECT_NE(0ul, id1);
 202   base::ProcessHandle handle = SpawnChild("SimpleChildProcess");
 203   ASSERT_NE(base::kNullProcessHandle, handle);
 204   base::ProcessId id2 = base::GetProcId(handle);
 205   EXPECT_NE(0ul, id2);
 206   EXPECT_NE(id1, id2);
 207   base::CloseProcessHandle(handle);
 208 }
 209 #endif
 210
 211 #if !defined(OS_MACOSX)
 212 // This test is disabled on Mac, since it's flaky due to ReportCrash
 213 // taking a variable amount of time to parse and load the debug and
 214 // symbol data for this unit test's executable before firing the
 215 // signal handler.
 216 //
 217 // TODO(gspencer): turn this test process into a very small program
 218 // with no symbols (instead of using the multiprocess testing
 219 // framework) to reduce the ReportCrash overhead.
 220 const char kSignalFileCrash[] = "CrashingChildProcess.die";
 221
 222 MULTIPROCESS_TEST_MAIN(CrashingChildProcess) {
 223   WaitToDie(ProcessUtilTest::GetSignalFilePath(kSignalFileCrash).c_str());
 224 #if defined(OS_POSIX)
 225   // Have to disable to signal handler for segv so we can get a crash
 226   // instead of an abnormal termination through the crash dump handler.
 227   ::signal(SIGSEGV, SIG_DFL);
 228 #endif
 229   // Make this process have a segmentation fault.
 230   volatile int* oops = NULL;
 231   *oops = 0xDEAD;
 232   return 1;
 233 }
 234
 235 // This test intentionally crashes, so we don't need to run it under
 236 // AddressSanitizer.
 237 #if defined(ADDRESS_SANITIZER) || defined(SYZYASAN)
 238 #define MAYBE_GetTerminationStatusCrash DISABLED_GetTerminationStatusCrash
 239 #else
 240 #define MAYBE_GetTerminationStatusCrash GetTerminationStatusCrash
 241 #endif
 242 TEST_F(ProcessUtilTest, MAYBE_GetTerminationStatusCrash) {
 243   const std::string signal_file =
 244     ProcessUtilTest::GetSignalFilePath(kSignalFileCrash);
 245   remove(signal_file.c_str());
 246   base::ProcessHandle handle = SpawnChild("CrashingChildProcess");
 247   ASSERT_NE(base::kNullProcessHandle, handle);
 248
 249   int exit_code = 42;
 250   EXPECT_EQ(base::TERMINATION_STATUS_STILL_RUNNING,
 251             base::GetTerminationStatus(handle, &exit_code));
 252   EXPECT_EQ(kExpectedStillRunningExitCode, exit_code);
 253
 254   SignalChildren(signal_file.c_str());
 255   exit_code = 42;
 256   base::TerminationStatus status =
 257       WaitForChildTermination(handle, &exit_code);
 258   EXPECT_EQ(base::TERMINATION_STATUS_PROCESS_CRASHED, status);
 259
 260 #if defined(OS_WIN)
 261   EXPECT_EQ(0xc0000005, exit_code);
 262 #elif defined(OS_POSIX)
 263   int signaled = WIFSIGNALED(exit_code);
 264   EXPECT_NE(0, signaled);
 265   int signal = WTERMSIG(exit_code);
 266   EXPECT_EQ(SIGSEGV, signal);
 267 #endif
 268   base::CloseProcessHandle(handle);
 269
 270   // Reset signal handlers back to "normal".
 271   base::debug::EnableInProcessStackDumping();
 272   remove(signal_file.c_str());
 273 }
 274 #endif  // !defined(OS_MACOSX)
 275
 276 MULTIPROCESS_TEST_MAIN(KilledChildProcess) {
 277   WaitToDie(ProcessUtilTest::GetSignalFilePath(kSignalFileKill).c_str());
 278 #if defined(OS_WIN)
 279   // Kill ourselves.
 280   HANDLE handle = ::OpenProcess(PROCESS_ALL_ACCESS, 0, ::GetCurrentProcessId());
 281   ::TerminateProcess(handle, kExpectedKilledExitCode);
 282 #elif defined(OS_POSIX)
 283   // Send a SIGKILL to this process, just like the OOM killer would.
 284   ::kill(getpid(), SIGKILL);
 285 #endif
 286   return 1;
 287 }
 288
 289 TEST_F(ProcessUtilTest, GetTerminationStatusKill) {
 290   const std::string signal_file =
 291     ProcessUtilTest::GetSignalFilePath(kSignalFileKill);
 292   remove(signal_file.c_str());
 293   base::ProcessHandle handle = SpawnChild("KilledChildProcess");
 294   ASSERT_NE(base::kNullProcessHandle, handle);
 295
 296   int exit_code = 42;
 297   EXPECT_EQ(base::TERMINATION_STATUS_STILL_RUNNING,
 298             base::GetTerminationStatus(handle, &exit_code));
 299   EXPECT_EQ(kExpectedStillRunningExitCode, exit_code);
 300
 301   SignalChildren(signal_file.c_str());
 302   exit_code = 42;
 303   base::TerminationStatus status =
 304       WaitForChildTermination(handle, &exit_code);
 305   EXPECT_EQ(base::TERMINATION_STATUS_PROCESS_WAS_KILLED, status);
 306 #if defined(OS_WIN)
 307   EXPECT_EQ(kExpectedKilledExitCode, exit_code);
 308 #elif defined(OS_POSIX)
 309   int signaled = WIFSIGNALED(exit_code);
 310   EXPECT_NE(0, signaled);
 311   int signal = WTERMSIG(exit_code);
 312   EXPECT_EQ(SIGKILL, signal);
 313 #endif
 314   base::CloseProcessHandle(handle);
 315   remove(signal_file.c_str());
 316 }
 317
 318 // Ensure that the priority of a process is restored correctly after
 319 // backgrounding and restoring.
 320 // Note: a platform may not be willing or able to lower the priority of
 321 // a process. The calls to SetProcessBackground should be noops then.
 322 TEST_F(ProcessUtilTest, SetProcessBackgrounded) {
 323   base::ProcessHandle handle = SpawnChild("SimpleChildProcess");
 324   base::Process process(handle);
 325   int old_priority = process.GetPriority();
 326 #if defined(OS_WIN)
 327   EXPECT_TRUE(process.SetProcessBackgrounded(true));
 328   EXPECT_TRUE(process.IsProcessBackgrounded());
 329   EXPECT_TRUE(process.SetProcessBackgrounded(false));
 330   EXPECT_FALSE(process.IsProcessBackgrounded());
 331 #else
 332   process.SetProcessBackgrounded(true);
 333   process.SetProcessBackgrounded(false);
 334 #endif
 335   int new_priority = process.GetPriority();
 336   EXPECT_EQ(old_priority, new_priority);
 337 }
 338
 339 // Same as SetProcessBackgrounded but to this very process. It uses
 340 // a different code path at least for Windows.
 341 TEST_F(ProcessUtilTest, SetProcessBackgroundedSelf) {
 342   base::Process process(base::Process::Current().handle());
 343   int old_priority = process.GetPriority();
 344 #if defined(OS_WIN)
 345   EXPECT_TRUE(process.SetProcessBackgrounded(true));
 346   EXPECT_TRUE(process.IsProcessBackgrounded());
 347   EXPECT_TRUE(process.SetProcessBackgrounded(false));
 348   EXPECT_FALSE(process.IsProcessBackgrounded());
 349 #else
 350   process.SetProcessBackgrounded(true);
 351   process.SetProcessBackgrounded(false);
 352 #endif
 353   int new_priority = process.GetPriority();
 354   EXPECT_EQ(old_priority, new_priority);
 355 }
 356
 357 #if defined(OS_WIN)
 358 // TODO(estade): if possible, port this test.
 359 TEST_F(ProcessUtilTest, GetAppOutput) {
 360   // Let's create a decently long message.
 361   std::string message;
 362   for (int i = 0; i < 1025; i++) {  // 1025 so it does not end on a kilo-byte
 363                                     // boundary.
 364     message += "Hello!";
 365   }
 366   // cmd.exe's echo always adds a \r\n to its output.
 367   std::string expected(message);
 368   expected += "\r\n";
 369
 370   FilePath cmd(L"cmd.exe");
 371   CommandLine cmd_line(cmd);
 372   cmd_line.AppendArg("/c");
 373   cmd_line.AppendArg("echo " + message + "");
 374   std::string output;
 375   ASSERT_TRUE(base::GetAppOutput(cmd_line, &output));
 376   EXPECT_EQ(expected, output);
 377
 378   // Let's make sure stderr is ignored.
 379   CommandLine other_cmd_line(cmd);
 380   other_cmd_line.AppendArg("/c");
 381   // http://msdn.microsoft.com/library/cc772622.aspx
 382   cmd_line.AppendArg("echo " + message + " >&2");
 383   output.clear();
 384   ASSERT_TRUE(base::GetAppOutput(other_cmd_line, &output));
 385   EXPECT_EQ("", output);
 386 }
 387
 388 // TODO(estade): if possible, port this test.
 389 TEST_F(ProcessUtilTest, LaunchAsUser) {
 390   base::UserTokenHandle token;
 391   ASSERT_TRUE(OpenProcessToken(GetCurrentProcess(), TOKEN_ALL_ACCESS, &token));
 392   base::LaunchOptions options;
 393   options.as_user = token;
 394   EXPECT_TRUE(base::LaunchProcess(MakeCmdLine("SimpleChildProcess"), options,
 395                                   NULL));
 396 }
 397
 398 static const char kEventToTriggerHandleSwitch[] = "event-to-trigger-handle";
 399
 400 MULTIPROCESS_TEST_MAIN(TriggerEventChildProcess) {
 401   std::string handle_value_string =
 402       CommandLine::ForCurrentProcess()->GetSwitchValueASCII(
 403           kEventToTriggerHandleSwitch);
 404   CHECK(!handle_value_string.empty());
 405
 406   uint64 handle_value_uint64;
 407   CHECK(base::StringToUint64(handle_value_string, &handle_value_uint64));
 408   // Give ownership of the handle to |event|.
 409   base::WaitableEvent event(reinterpret_cast<HANDLE>(handle_value_uint64));
 410
 411   event.Signal();
 412
 413   return 0;
 414 }
 415
 416 TEST_F(ProcessUtilTest, InheritSpecifiedHandles) {
 417   // Manually create the event, so that it can be inheritable.
 418   SECURITY_ATTRIBUTES security_attributes = {};
 419   security_attributes.nLength = static_cast<DWORD>(sizeof(security_attributes));
 420   security_attributes.lpSecurityDescriptor = NULL;
 421   security_attributes.bInheritHandle = true;
 422
 423   // Takes ownership of the event handle.
 424   base::WaitableEvent event(
 425       CreateEvent(&security_attributes, true, false, NULL));
 426   base::HandlesToInheritVector handles_to_inherit;
 427   handles_to_inherit.push_back(event.handle());
 428   base::LaunchOptions options;
 429   options.handles_to_inherit = &handles_to_inherit;
 430
 431   CommandLine cmd_line = MakeCmdLine("TriggerEventChildProcess");
 432   cmd_line.AppendSwitchASCII(kEventToTriggerHandleSwitch,
 433       base::Uint64ToString(reinterpret_cast<uint64>(event.handle())));
 434
 435   // This functionality actually requires Vista or later. Make sure that it
 436   // fails properly on XP.
 437   if (base::win::GetVersion() < base::win::VERSION_VISTA) {
 438     EXPECT_FALSE(base::LaunchProcess(cmd_line, options, NULL));
 439     return;
 440   }
 441
 442   // Launch the process and wait for it to trigger the event.
 443   ASSERT_TRUE(base::LaunchProcess(cmd_line, options, NULL));
 444   EXPECT_TRUE(event.TimedWait(TestTimeouts::action_max_timeout()));
 445 }
 446 #endif  // defined(OS_WIN)
 447
 448 #if defined(OS_POSIX)
 449
 450 namespace {
 451
 452 // Returns the maximum number of files that a process can have open.
 453 // Returns 0 on error.
 454 int GetMaxFilesOpenInProcess() {
 455   struct rlimit rlim;
 456   if (getrlimit(RLIMIT_NOFILE, &rlim) != 0) {
 457     return 0;
 458   }
 459
 460   // rlim_t is a uint64 - clip to maxint. We do this since FD #s are ints
 461   // which are all 32 bits on the supported platforms.
 462   rlim_t max_int = static_cast<rlim_t>(std::numeric_limits<int32>::max());
 463   if (rlim.rlim_cur > max_int) {
 464     return max_int;
 465   }
 466
 467   return rlim.rlim_cur;
 468 }
 469
 470 const int kChildPipe = 20;  // FD # for write end of pipe in child process.
 471
 472 }  // namespace
 473
 474 MULTIPROCESS_TEST_MAIN(ProcessUtilsLeakFDChildProcess) {
 475   // This child process counts the number of open FDs, it then writes that
 476   // number out to a pipe connected to the parent.
 477   int num_open_files = 0;
 478   int write_pipe = kChildPipe;
 479   int max_files = GetMaxFilesOpenInProcess();
 480   for (int i = STDERR_FILENO + 1; i < max_files; i++) {
 481     if (i != kChildPipe) {
 482       int fd;
 483       if ((fd = HANDLE_EINTR(dup(i))) != -1) {
 484         close(fd);
 485         num_open_files += 1;
 486       }
 487     }
 488   }
 489
 490   int written = HANDLE_EINTR(write(write_pipe, &num_open_files,
 491                                    sizeof(num_open_files)));
 492   DCHECK_EQ(static_cast<size_t>(written), sizeof(num_open_files));
 493   int ret = IGNORE_EINTR(close(write_pipe));
 494   DPCHECK(ret == 0);
 495
 496   return 0;
 497 }
 498
 499 int ProcessUtilTest::CountOpenFDsInChild() {
 500   int fds[2];
 501   if (pipe(fds) < 0)
 502     NOTREACHED();
 503
 504   base::FileHandleMappingVector fd_mapping_vec;
 505   fd_mapping_vec.push_back(std::pair<int, int>(fds[1], kChildPipe));
 506   base::LaunchOptions options;
 507   options.fds_to_remap = &fd_mapping_vec;
 508   base::ProcessHandle handle =
 509       SpawnChildWithOptions("ProcessUtilsLeakFDChildProcess", options);
 510   CHECK(handle);
 511   int ret = IGNORE_EINTR(close(fds[1]));
 512   DPCHECK(ret == 0);
 513
 514   // Read number of open files in client process from pipe;
 515   int num_open_files = -1;
 516   ssize_t bytes_read =
 517       HANDLE_EINTR(read(fds[0], &num_open_files, sizeof(num_open_files)));
 518   CHECK_EQ(bytes_read, static_cast<ssize_t>(sizeof(num_open_files)));
 519
 520 #if defined(THREAD_SANITIZER)
 521   // Compiler-based ThreadSanitizer makes this test slow.
 522   CHECK(base::WaitForSingleProcess(handle, base::TimeDelta::FromSeconds(3)));
 523 #else
 524   CHECK(base::WaitForSingleProcess(handle, base::TimeDelta::FromSeconds(1)));
 525 #endif
 526   base::CloseProcessHandle(handle);
 527   ret = IGNORE_EINTR(close(fds[0]));
 528   DPCHECK(ret == 0);
 529
 530   return num_open_files;
 531 }
 532
 533 #if defined(ADDRESS_SANITIZER) || defined(THREAD_SANITIZER)
 534 // ProcessUtilTest.FDRemapping is flaky when ran under xvfb-run on Precise.
 535 // The problem is 100% reproducible with both ASan and TSan.
 536 // See http://crbug.com/136720.
 537 #define MAYBE_FDRemapping DISABLED_FDRemapping
 538 #else
 539 #define MAYBE_FDRemapping FDRemapping
 540 #endif
 541 TEST_F(ProcessUtilTest, MAYBE_FDRemapping) {
 542   int fds_before = CountOpenFDsInChild();
 543
 544   // open some dummy fds to make sure they don't propagate over to the
 545   // child process.
 546   int dev_null = open("/dev/null", O_RDONLY);
 547   int sockets[2];
 548   socketpair(AF_UNIX, SOCK_STREAM, 0, sockets);
 549
 550   int fds_after = CountOpenFDsInChild();
 551
 552   ASSERT_EQ(fds_after, fds_before);
 553
 554   int ret;
 555   ret = IGNORE_EINTR(close(sockets[0]));
 556   DPCHECK(ret == 0);
 557   ret = IGNORE_EINTR(close(sockets[1]));
 558   DPCHECK(ret == 0);
 559   ret = IGNORE_EINTR(close(dev_null));
 560   DPCHECK(ret == 0);
 561 }
 562
 563 namespace {
 564
 565 std::string TestLaunchProcess(const base::EnvironmentMap& env_changes,
 566                               const int clone_flags) {
 567   std::vector<std::string> args;
 568   base::FileHandleMappingVector fds_to_remap;
 569
 570   args.push_back(kPosixShell);
 571   args.push_back("-c");
 572   args.push_back("echo $BASE_TEST");
 573
 574   int fds[2];
 575   PCHECK(pipe(fds) == 0);
 576
 577   fds_to_remap.push_back(std::make_pair(fds[1], 1));
 578   base::LaunchOptions options;
 579   options.wait = true;
 580   options.environ = env_changes;
 581   options.fds_to_remap = &fds_to_remap;
 582 #if defined(OS_LINUX)
 583   options.clone_flags = clone_flags;
 584 #else
 585   CHECK_EQ(0, clone_flags);
 586 #endif  // OS_LINUX
 587   EXPECT_TRUE(base::LaunchProcess(args, options, NULL));
 588   PCHECK(IGNORE_EINTR(close(fds[1])) == 0);
 589
 590   char buf[512];
 591   const ssize_t n = HANDLE_EINTR(read(fds[0], buf, sizeof(buf)));
 592   PCHECK(n > 0);
 593
 594   PCHECK(IGNORE_EINTR(close(fds[0])) == 0);
 595
 596   return std::string(buf, n);
 597 }
 598
 599 const char kLargeString[] =
 600     "0123456789012345678901234567890123456789012345678901234567890123456789"
 601     "0123456789012345678901234567890123456789012345678901234567890123456789"
 602     "0123456789012345678901234567890123456789012345678901234567890123456789"
 603     "0123456789012345678901234567890123456789012345678901234567890123456789"
 604     "0123456789012345678901234567890123456789012345678901234567890123456789"
 605     "0123456789012345678901234567890123456789012345678901234567890123456789"
 606     "0123456789012345678901234567890123456789012345678901234567890123456789";
 607
 608 }  // namespace
 609
 610 TEST_F(ProcessUtilTest, LaunchProcess) {
 611   base::EnvironmentMap env_changes;
 612   const int no_clone_flags = 0;
 613
 614   const char kBaseTest[] = "BASE_TEST";
 615
 616   env_changes[kBaseTest] = "bar";
 617   EXPECT_EQ("bar\n", TestLaunchProcess(env_changes, no_clone_flags));
 618   env_changes.clear();
 619
 620   EXPECT_EQ(0, setenv(kBaseTest, "testing", 1 /* override */));
 621   EXPECT_EQ("testing\n", TestLaunchProcess(env_changes, no_clone_flags));
 622
 623   env_changes[kBaseTest] = std::string();
 624   EXPECT_EQ("\n", TestLaunchProcess(env_changes, no_clone_flags));
 625
 626   env_changes[kBaseTest] = "foo";
 627   EXPECT_EQ("foo\n", TestLaunchProcess(env_changes, no_clone_flags));
 628
 629   env_changes.clear();
 630   EXPECT_EQ(0, setenv(kBaseTest, kLargeString, 1 /* override */));
 631   EXPECT_EQ(std::string(kLargeString) + "\n",
 632             TestLaunchProcess(env_changes, no_clone_flags));
 633
 634   env_changes[kBaseTest] = "wibble";
 635   EXPECT_EQ("wibble\n", TestLaunchProcess(env_changes, no_clone_flags));
 636
 637 #if defined(OS_LINUX)
 638   // Test a non-trival value for clone_flags.
 639   // Don't test on Valgrind as it has limited support for clone().
 640   if (!RunningOnValgrind()) {
 641     EXPECT_EQ("wibble\n", TestLaunchProcess(env_changes, CLONE_FS | SIGCHLD));
 642   }
 643 #endif
 644 }
 645
 646 TEST_F(ProcessUtilTest, GetAppOutput) {
 647   std::string output;
 648
 649 #if defined(OS_ANDROID)
 650   std::vector<std::string> argv;
 651   argv.push_back("sh");  // Instead of /bin/sh, force path search to find it.
 652   argv.push_back("-c");
 653
 654   argv.push_back("exit 0");
 655   EXPECT_TRUE(base::GetAppOutput(CommandLine(argv), &output));
 656   EXPECT_STREQ("", output.c_str());
 657
 658   argv[2] = "exit 1";
 659   EXPECT_FALSE(base::GetAppOutput(CommandLine(argv), &output));
 660   EXPECT_STREQ("", output.c_str());
 661
 662   argv[2] = "echo foobar42";
 663   EXPECT_TRUE(base::GetAppOutput(CommandLine(argv), &output));
 664   EXPECT_STREQ("foobar42\n", output.c_str());
 665 #else
 666   EXPECT_TRUE(base::GetAppOutput(CommandLine(FilePath("true")), &output));
 667   EXPECT_STREQ("", output.c_str());
 668
 669   EXPECT_FALSE(base::GetAppOutput(CommandLine(FilePath("false")), &output));
 670
 671   std::vector<std::string> argv;
 672   argv.push_back("/bin/echo");
 673   argv.push_back("-n");
 674   argv.push_back("foobar42");
 675   EXPECT_TRUE(base::GetAppOutput(CommandLine(argv), &output));
 676   EXPECT_STREQ("foobar42", output.c_str());
 677 #endif  // defined(OS_ANDROID)
 678 }
 679
 680 TEST_F(ProcessUtilTest, GetAppOutputRestricted) {
 681   // Unfortunately, since we can't rely on the path, we need to know where
 682   // everything is. So let's use /bin/sh, which is on every POSIX system, and
 683   // its built-ins.
 684   std::vector<std::string> argv;
 685   argv.push_back(std::string(kShellPath));  // argv[0]
 686   argv.push_back("-c");  // argv[1]
 687
 688   // On success, should set |output|. We use |/bin/sh -c 'exit 0'| instead of
 689   // |true| since the location of the latter may be |/bin| or |/usr/bin| (and we
 690   // need absolute paths).
 691   argv.push_back("exit 0");   // argv[2]; equivalent to "true"
 692   std::string output = "abc";
 693   EXPECT_TRUE(base::GetAppOutputRestricted(CommandLine(argv), &output, 100));
 694   EXPECT_STREQ("", output.c_str());
 695
 696   argv[2] = "exit 1";  // equivalent to "false"
 697   output = "before";
 698   EXPECT_FALSE(base::GetAppOutputRestricted(CommandLine(argv),
 699                                             &output, 100));
 700   EXPECT_STREQ("", output.c_str());
 701
 702   // Amount of output exactly equal to space allowed.
 703   argv[2] = "echo 123456789";  // (the sh built-in doesn't take "-n")
 704   output.clear();
 705   EXPECT_TRUE(base::GetAppOutputRestricted(CommandLine(argv), &output, 10));
 706   EXPECT_STREQ("123456789\n", output.c_str());
 707
 708   // Amount of output greater than space allowed.
 709   output.clear();
 710   EXPECT_TRUE(base::GetAppOutputRestricted(CommandLine(argv), &output, 5));
 711   EXPECT_STREQ("12345", output.c_str());
 712
 713   // Amount of output less than space allowed.
 714   output.clear();
 715   EXPECT_TRUE(base::GetAppOutputRestricted(CommandLine(argv), &output, 15));
 716   EXPECT_STREQ("123456789\n", output.c_str());
 717
 718   // Zero space allowed.
 719   output = "abc";
 720   EXPECT_TRUE(base::GetAppOutputRestricted(CommandLine(argv), &output, 0));
 721   EXPECT_STREQ("", output.c_str());
 722 }
 723
 724 #if !defined(OS_MACOSX) && !defined(OS_OPENBSD)
 725 // TODO(benwells): GetAppOutputRestricted should terminate applications
 726 // with SIGPIPE when we have enough output. http://crbug.com/88502
 727 TEST_F(ProcessUtilTest, GetAppOutputRestrictedSIGPIPE) {
 728   std::vector<std::string> argv;
 729   std::string output;
 730
 731   argv.push_back(std::string(kShellPath));  // argv[0]
 732   argv.push_back("-c");
 733 #if defined(OS_ANDROID)
 734   argv.push_back("while echo 12345678901234567890; do :; done");
 735   EXPECT_TRUE(base::GetAppOutputRestricted(CommandLine(argv), &output, 10));
 736   EXPECT_STREQ("1234567890", output.c_str());
 737 #else
 738   argv.push_back("yes");
 739   EXPECT_TRUE(base::GetAppOutputRestricted(CommandLine(argv), &output, 10));
 740   EXPECT_STREQ("y\ny\ny\ny\ny\n", output.c_str());
 741 #endif
 742 }
 743 #endif
 744
 745 #if defined(ADDRESS_SANITIZER) && defined(OS_MACOSX) && \
 746     defined(ARCH_CPU_64_BITS)
 747 // Times out under AddressSanitizer on 64-bit OS X, see
 748 // http://crbug.com/298197.
 749 #define MAYBE_GetAppOutputRestrictedNoZombies \
 750     DISABLED_GetAppOutputRestrictedNoZombies
 751 #else
 752 #define MAYBE_GetAppOutputRestrictedNoZombies GetAppOutputRestrictedNoZombies
 753 #endif
 754 TEST_F(ProcessUtilTest, MAYBE_GetAppOutputRestrictedNoZombies) {
 755   std::vector<std::string> argv;
 756
 757   argv.push_back(std::string(kShellPath));  // argv[0]
 758   argv.push_back("-c");  // argv[1]
 759   argv.push_back("echo 123456789012345678901234567890");  // argv[2]
 760
 761   // Run |GetAppOutputRestricted()| 300 (> default per-user processes on Mac OS
 762   // 10.5) times with an output buffer big enough to capture all output.
 763   for (int i = 0; i < 300; i++) {
 764     std::string output;
 765     EXPECT_TRUE(base::GetAppOutputRestricted(CommandLine(argv), &output, 100));
 766     EXPECT_STREQ("123456789012345678901234567890\n", output.c_str());
 767   }
 768
 769   // Ditto, but with an output buffer too small to capture all output.
 770   for (int i = 0; i < 300; i++) {
 771     std::string output;
 772     EXPECT_TRUE(base::GetAppOutputRestricted(CommandLine(argv), &output, 10));
 773     EXPECT_STREQ("1234567890", output.c_str());
 774   }
 775 }
 776
 777 TEST_F(ProcessUtilTest, GetAppOutputWithExitCode) {
 778   // Test getting output from a successful application.
 779   std::vector<std::string> argv;
 780   std::string output;
 781   int exit_code;
 782   argv.push_back(std::string(kShellPath));  // argv[0]
 783   argv.push_back("-c");  // argv[1]
 784   argv.push_back("echo foo");  // argv[2];
 785   EXPECT_TRUE(base::GetAppOutputWithExitCode(CommandLine(argv), &output,
 786                                              &exit_code));
 787   EXPECT_STREQ("foo\n", output.c_str());
 788   EXPECT_EQ(exit_code, 0);
 789
 790   // Test getting output from an application which fails with a specific exit
 791   // code.
 792   output.clear();
 793   argv[2] = "echo foo; exit 2";
 794   EXPECT_TRUE(base::GetAppOutputWithExitCode(CommandLine(argv), &output,
 795                                              &exit_code));
 796   EXPECT_STREQ("foo\n", output.c_str());
 797   EXPECT_EQ(exit_code, 2);
 798 }
 799
 800 TEST_F(ProcessUtilTest, GetParentProcessId) {
 801   base::ProcessId ppid = base::GetParentProcessId(base::GetCurrentProcId());
 802   EXPECT_EQ(ppid, getppid());
 803 }
 804
 805 // TODO(port): port those unit tests.
 806 bool IsProcessDead(base::ProcessHandle child) {
 807   // waitpid() will actually reap the process which is exactly NOT what we
 808   // want to test for.  The good thing is that if it can't find the process
 809   // we'll get a nice value for errno which we can test for.
 810   const pid_t result = HANDLE_EINTR(waitpid(child, NULL, WNOHANG));
 811   return result == -1 && errno == ECHILD;
 812 }
 813
 814 TEST_F(ProcessUtilTest, DelayedTermination) {
 815   base::ProcessHandle child_process = SpawnChild("process_util_test_never_die");
 816   ASSERT_TRUE(child_process);
 817   base::EnsureProcessTerminated(child_process);
 818   base::WaitForSingleProcess(child_process, base::TimeDelta::FromSeconds(5));
 819
 820   // Check that process was really killed.
 821   EXPECT_TRUE(IsProcessDead(child_process));
 822   base::CloseProcessHandle(child_process);
 823 }
 824
 825 MULTIPROCESS_TEST_MAIN(process_util_test_never_die) {
 826   while (1) {
 827     sleep(500);
 828   }
 829   return 0;
 830 }
 831
 832 TEST_F(ProcessUtilTest, ImmediateTermination) {
 833   base::ProcessHandle child_process =
 834       SpawnChild("process_util_test_die_immediately");
 835   ASSERT_TRUE(child_process);
 836   // Give it time to die.
 837   sleep(2);
 838   base::EnsureProcessTerminated(child_process);
 839
 840   // Check that process was really killed.
 841   EXPECT_TRUE(IsProcessDead(child_process));
 842   base::CloseProcessHandle(child_process);
 843 }
 844
 845 MULTIPROCESS_TEST_MAIN(process_util_test_die_immediately) {
 846   return 0;
 847 }
 848
 849 #endif  // defined(OS_POSIX)