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 TEST_F(ProcessUtilTest, SpawnChild) {
 148   base::ProcessHandle handle = this->SpawnChild("SimpleChildProcess", false);
 149   ASSERT_NE(base::kNullProcessHandle, handle);
 150   EXPECT_TRUE(base::WaitForSingleProcess(
 151                   handle, TestTimeouts::action_max_timeout()));
 152   base::CloseProcessHandle(handle);
 153 }
 154
 155 MULTIPROCESS_TEST_MAIN(SlowChildProcess) {
 156   WaitToDie(ProcessUtilTest::GetSignalFilePath(kSignalFileSlow).c_str());
 157   return 0;
 158 }
 159
 160 TEST_F(ProcessUtilTest, KillSlowChild) {
 161   const std::string signal_file =
 162       ProcessUtilTest::GetSignalFilePath(kSignalFileSlow);
 163   remove(signal_file.c_str());
 164   base::ProcessHandle handle = this->SpawnChild("SlowChildProcess", false);
 165   ASSERT_NE(base::kNullProcessHandle, handle);
 166   SignalChildren(signal_file.c_str());
 167   EXPECT_TRUE(base::WaitForSingleProcess(
 168                   handle, TestTimeouts::action_max_timeout()));
 169   base::CloseProcessHandle(handle);
 170   remove(signal_file.c_str());
 171 }
 172
 173 // Times out on Linux and Win, flakes on other platforms, http://crbug.com/95058
 174 TEST_F(ProcessUtilTest, DISABLED_GetTerminationStatusExit) {
 175   const std::string signal_file =
 176       ProcessUtilTest::GetSignalFilePath(kSignalFileSlow);
 177   remove(signal_file.c_str());
 178   base::ProcessHandle handle = this->SpawnChild("SlowChildProcess", false);
 179   ASSERT_NE(base::kNullProcessHandle, handle);
 180
 181   int exit_code = 42;
 182   EXPECT_EQ(base::TERMINATION_STATUS_STILL_RUNNING,
 183             base::GetTerminationStatus(handle, &exit_code));
 184   EXPECT_EQ(kExpectedStillRunningExitCode, exit_code);
 185
 186   SignalChildren(signal_file.c_str());
 187   exit_code = 42;
 188   base::TerminationStatus status =
 189       WaitForChildTermination(handle, &exit_code);
 190   EXPECT_EQ(base::TERMINATION_STATUS_NORMAL_TERMINATION, status);
 191   EXPECT_EQ(0, exit_code);
 192   base::CloseProcessHandle(handle);
 193   remove(signal_file.c_str());
 194 }
 195
 196 #if defined(OS_WIN)
 197 // TODO(cpu): figure out how to test this in other platforms.
 198 TEST_F(ProcessUtilTest, GetProcId) {
 199   base::ProcessId id1 = base::GetProcId(GetCurrentProcess());
 200   EXPECT_NE(0ul, id1);
 201   base::ProcessHandle handle = this->SpawnChild("SimpleChildProcess", false);
 202   ASSERT_NE(base::kNullProcessHandle, handle);
 203   base::ProcessId id2 = base::GetProcId(handle);
 204   EXPECT_NE(0ul, id2);
 205   EXPECT_NE(id1, id2);
 206   base::CloseProcessHandle(handle);
 207 }
 208 #endif
 209
 210 #if !defined(OS_MACOSX)
 211 // This test is disabled on Mac, since it's flaky due to ReportCrash
 212 // taking a variable amount of time to parse and load the debug and
 213 // symbol data for this unit test's executable before firing the
 214 // signal handler.
 215 //
 216 // TODO(gspencer): turn this test process into a very small program
 217 // with no symbols (instead of using the multiprocess testing
 218 // framework) to reduce the ReportCrash overhead.
 219 const char kSignalFileCrash[] = "CrashingChildProcess.die";
 220
 221 MULTIPROCESS_TEST_MAIN(CrashingChildProcess) {
 222   WaitToDie(ProcessUtilTest::GetSignalFilePath(kSignalFileCrash).c_str());
 223 #if defined(OS_POSIX)
 224   // Have to disable to signal handler for segv so we can get a crash
 225   // instead of an abnormal termination through the crash dump handler.
 226   ::signal(SIGSEGV, SIG_DFL);
 227 #endif
 228   // Make this process have a segmentation fault.
 229   volatile int* oops = NULL;
 230   *oops = 0xDEAD;
 231   return 1;
 232 }
 233
 234 // This test intentionally crashes, so we don't need to run it under
 235 // AddressSanitizer.
 236 // TODO(jschuh): crbug.com/175753 Fix this in Win64 bots.
 237 #if defined(ADDRESS_SANITIZER) || (defined(OS_WIN) && defined(ARCH_CPU_X86_64))
 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 = this->SpawnChild("CrashingChildProcess",
 247                                                 false);
 248   ASSERT_NE(base::kNullProcessHandle, handle);
 249
 250   int exit_code = 42;
 251   EXPECT_EQ(base::TERMINATION_STATUS_STILL_RUNNING,
 252             base::GetTerminationStatus(handle, &exit_code));
 253   EXPECT_EQ(kExpectedStillRunningExitCode, exit_code);
 254
 255   SignalChildren(signal_file.c_str());
 256   exit_code = 42;
 257   base::TerminationStatus status =
 258       WaitForChildTermination(handle, &exit_code);
 259   EXPECT_EQ(base::TERMINATION_STATUS_PROCESS_CRASHED, status);
 260
 261 #if defined(OS_WIN)
 262   EXPECT_EQ(0xc0000005, exit_code);
 263 #elif defined(OS_POSIX)
 264   int signaled = WIFSIGNALED(exit_code);
 265   EXPECT_NE(0, signaled);
 266   int signal = WTERMSIG(exit_code);
 267   EXPECT_EQ(SIGSEGV, signal);
 268 #endif
 269   base::CloseProcessHandle(handle);
 270
 271   // Reset signal handlers back to "normal".
 272   base::debug::EnableInProcessStackDumping();
 273   remove(signal_file.c_str());
 274 }
 275 #endif  // !defined(OS_MACOSX)
 276
 277 MULTIPROCESS_TEST_MAIN(KilledChildProcess) {
 278   WaitToDie(ProcessUtilTest::GetSignalFilePath(kSignalFileKill).c_str());
 279 #if defined(OS_WIN)
 280   // Kill ourselves.
 281   HANDLE handle = ::OpenProcess(PROCESS_ALL_ACCESS, 0, ::GetCurrentProcessId());
 282   ::TerminateProcess(handle, kExpectedKilledExitCode);
 283 #elif defined(OS_POSIX)
 284   // Send a SIGKILL to this process, just like the OOM killer would.
 285   ::kill(getpid(), SIGKILL);
 286 #endif
 287   return 1;
 288 }
 289
 290 TEST_F(ProcessUtilTest, GetTerminationStatusKill) {
 291   const std::string signal_file =
 292     ProcessUtilTest::GetSignalFilePath(kSignalFileKill);
 293   remove(signal_file.c_str());
 294   base::ProcessHandle handle = this->SpawnChild("KilledChildProcess",
 295                                                 false);
 296   ASSERT_NE(base::kNullProcessHandle, handle);
 297
 298   int exit_code = 42;
 299   EXPECT_EQ(base::TERMINATION_STATUS_STILL_RUNNING,
 300             base::GetTerminationStatus(handle, &exit_code));
 301   EXPECT_EQ(kExpectedStillRunningExitCode, exit_code);
 302
 303   SignalChildren(signal_file.c_str());
 304   exit_code = 42;
 305   base::TerminationStatus status =
 306       WaitForChildTermination(handle, &exit_code);
 307   EXPECT_EQ(base::TERMINATION_STATUS_PROCESS_WAS_KILLED, status);
 308 #if defined(OS_WIN)
 309   EXPECT_EQ(kExpectedKilledExitCode, exit_code);
 310 #elif defined(OS_POSIX)
 311   int signaled = WIFSIGNALED(exit_code);
 312   EXPECT_NE(0, signaled);
 313   int signal = WTERMSIG(exit_code);
 314   EXPECT_EQ(SIGKILL, signal);
 315 #endif
 316   base::CloseProcessHandle(handle);
 317   remove(signal_file.c_str());
 318 }
 319
 320 // Ensure that the priority of a process is restored correctly after
 321 // backgrounding and restoring.
 322 // Note: a platform may not be willing or able to lower the priority of
 323 // a process. The calls to SetProcessBackground should be noops then.
 324 TEST_F(ProcessUtilTest, SetProcessBackgrounded) {
 325   base::ProcessHandle handle = this->SpawnChild("SimpleChildProcess", false);
 326   base::Process process(handle);
 327   int old_priority = process.GetPriority();
 328 #if defined(OS_WIN)
 329   EXPECT_TRUE(process.SetProcessBackgrounded(true));
 330   EXPECT_TRUE(process.IsProcessBackgrounded());
 331   EXPECT_TRUE(process.SetProcessBackgrounded(false));
 332   EXPECT_FALSE(process.IsProcessBackgrounded());
 333 #else
 334   process.SetProcessBackgrounded(true);
 335   process.SetProcessBackgrounded(false);
 336 #endif
 337   int new_priority = process.GetPriority();
 338   EXPECT_EQ(old_priority, new_priority);
 339 }
 340
 341 // Same as SetProcessBackgrounded but to this very process. It uses
 342 // a different code path at least for Windows.
 343 TEST_F(ProcessUtilTest, SetProcessBackgroundedSelf) {
 344   base::Process process(base::Process::Current().handle());
 345   int old_priority = process.GetPriority();
 346 #if defined(OS_WIN)
 347   EXPECT_TRUE(process.SetProcessBackgrounded(true));
 348   EXPECT_TRUE(process.IsProcessBackgrounded());
 349   EXPECT_TRUE(process.SetProcessBackgrounded(false));
 350   EXPECT_FALSE(process.IsProcessBackgrounded());
 351 #else
 352   process.SetProcessBackgrounded(true);
 353   process.SetProcessBackgrounded(false);
 354 #endif
 355   int new_priority = process.GetPriority();
 356   EXPECT_EQ(old_priority, new_priority);
 357 }
 358
 359 #if defined(OS_WIN)
 360 // TODO(estade): if possible, port this test.
 361 TEST_F(ProcessUtilTest, GetAppOutput) {
 362   // Let's create a decently long message.
 363   std::string message;
 364   for (int i = 0; i < 1025; i++) {  // 1025 so it does not end on a kilo-byte
 365                                     // boundary.
 366     message += "Hello!";
 367   }
 368   // cmd.exe's echo always adds a \r\n to its output.
 369   std::string expected(message);
 370   expected += "\r\n";
 371
 372   FilePath cmd(L"cmd.exe");
 373   CommandLine cmd_line(cmd);
 374   cmd_line.AppendArg("/c");
 375   cmd_line.AppendArg("echo " + message + "");
 376   std::string output;
 377   ASSERT_TRUE(base::GetAppOutput(cmd_line, &output));
 378   EXPECT_EQ(expected, output);
 379
 380   // Let's make sure stderr is ignored.
 381   CommandLine other_cmd_line(cmd);
 382   other_cmd_line.AppendArg("/c");
 383   // http://msdn.microsoft.com/library/cc772622.aspx
 384   cmd_line.AppendArg("echo " + message + " >&2");
 385   output.clear();
 386   ASSERT_TRUE(base::GetAppOutput(other_cmd_line, &output));
 387   EXPECT_EQ("", output);
 388 }
 389
 390 // TODO(estade): if possible, port this test.
 391 TEST_F(ProcessUtilTest, LaunchAsUser) {
 392   base::UserTokenHandle token;
 393   ASSERT_TRUE(OpenProcessToken(GetCurrentProcess(), TOKEN_ALL_ACCESS, &token));
 394   base::LaunchOptions options;
 395   options.as_user = token;
 396   EXPECT_TRUE(base::LaunchProcess(
 397       this->MakeCmdLine("SimpleChildProcess", false), options, NULL));
 398 }
 399
 400 static const char kEventToTriggerHandleSwitch[] = "event-to-trigger-handle";
 401
 402 MULTIPROCESS_TEST_MAIN(TriggerEventChildProcess) {
 403   std::string handle_value_string =
 404       CommandLine::ForCurrentProcess()->GetSwitchValueASCII(
 405           kEventToTriggerHandleSwitch);
 406   CHECK(!handle_value_string.empty());
 407
 408   uint64 handle_value_uint64;
 409   CHECK(base::StringToUint64(handle_value_string, &handle_value_uint64));
 410   // Give ownership of the handle to |event|.
 411   base::WaitableEvent event(reinterpret_cast<HANDLE>(handle_value_uint64));
 412
 413   event.Signal();
 414
 415   return 0;
 416 }
 417
 418 TEST_F(ProcessUtilTest, InheritSpecifiedHandles) {
 419   // Manually create the event, so that it can be inheritable.
 420   SECURITY_ATTRIBUTES security_attributes = {};
 421   security_attributes.nLength = static_cast<DWORD>(sizeof(security_attributes));
 422   security_attributes.lpSecurityDescriptor = NULL;
 423   security_attributes.bInheritHandle = true;
 424
 425   // Takes ownership of the event handle.
 426   base::WaitableEvent event(
 427       CreateEvent(&security_attributes, true, false, NULL));
 428   base::HandlesToInheritVector handles_to_inherit;
 429   handles_to_inherit.push_back(event.handle());
 430   base::LaunchOptions options;
 431   options.handles_to_inherit = &handles_to_inherit;
 432
 433   CommandLine cmd_line = MakeCmdLine("TriggerEventChildProcess", false);
 434   cmd_line.AppendSwitchASCII(kEventToTriggerHandleSwitch,
 435       base::Uint64ToString(reinterpret_cast<uint64>(event.handle())));
 436
 437   // This functionality actually requires Vista or later. Make sure that it
 438   // fails properly on XP.
 439   if (base::win::GetVersion() < base::win::VERSION_VISTA) {
 440     EXPECT_FALSE(base::LaunchProcess(cmd_line, options, NULL));
 441     return;
 442   }
 443
 444   // Launch the process and wait for it to trigger the event.
 445   ASSERT_TRUE(base::LaunchProcess(cmd_line, options, NULL));
 446   EXPECT_TRUE(event.TimedWait(TestTimeouts::action_max_timeout()));
 447 }
 448 #endif  // defined(OS_WIN)
 449
 450 #if defined(OS_POSIX)
 451
 452 namespace {
 453
 454 // Returns the maximum number of files that a process can have open.
 455 // Returns 0 on error.
 456 int GetMaxFilesOpenInProcess() {
 457   struct rlimit rlim;
 458   if (getrlimit(RLIMIT_NOFILE, &rlim) != 0) {
 459     return 0;
 460   }
 461
 462   // rlim_t is a uint64 - clip to maxint. We do this since FD #s are ints
 463   // which are all 32 bits on the supported platforms.
 464   rlim_t max_int = static_cast<rlim_t>(std::numeric_limits<int32>::max());
 465   if (rlim.rlim_cur > max_int) {
 466     return max_int;
 467   }
 468
 469   return rlim.rlim_cur;
 470 }
 471
 472 const int kChildPipe = 20;  // FD # for write end of pipe in child process.
 473
 474 }  // namespace
 475
 476 MULTIPROCESS_TEST_MAIN(ProcessUtilsLeakFDChildProcess) {
 477   // This child process counts the number of open FDs, it then writes that
 478   // number out to a pipe connected to the parent.
 479   int num_open_files = 0;
 480   int write_pipe = kChildPipe;
 481   int max_files = GetMaxFilesOpenInProcess();
 482   for (int i = STDERR_FILENO + 1; i < max_files; i++) {
 483     if (i != kChildPipe) {
 484       int fd;
 485       if ((fd = HANDLE_EINTR(dup(i))) != -1) {
 486         close(fd);
 487         num_open_files += 1;
 488       }
 489     }
 490   }
 491
 492   int written = HANDLE_EINTR(write(write_pipe, &num_open_files,
 493                                    sizeof(num_open_files)));
 494   DCHECK_EQ(static_cast<size_t>(written), sizeof(num_open_files));
 495   int ret = IGNORE_EINTR(close(write_pipe));
 496   DPCHECK(ret == 0);
 497
 498   return 0;
 499 }
 500
 501 int ProcessUtilTest::CountOpenFDsInChild() {
 502   int fds[2];
 503   if (pipe(fds) < 0)
 504     NOTREACHED();
 505
 506   base::FileHandleMappingVector fd_mapping_vec;
 507   fd_mapping_vec.push_back(std::pair<int, int>(fds[1], kChildPipe));
 508   base::ProcessHandle handle = this->SpawnChild(
 509       "ProcessUtilsLeakFDChildProcess", fd_mapping_vec, false);
 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 =
 816       SpawnChild("process_util_test_never_die", false);
 817   ASSERT_TRUE(child_process);
 818   base::EnsureProcessTerminated(child_process);
 819   base::WaitForSingleProcess(child_process, base::TimeDelta::FromSeconds(5));
 820
 821   // Check that process was really killed.
 822   EXPECT_TRUE(IsProcessDead(child_process));
 823   base::CloseProcessHandle(child_process);
 824 }
 825
 826 MULTIPROCESS_TEST_MAIN(process_util_test_never_die) {
 827   while (1) {
 828     sleep(500);
 829   }
 830   return 0;
 831 }
 832
 833 TEST_F(ProcessUtilTest, ImmediateTermination) {
 834   base::ProcessHandle child_process =
 835       SpawnChild("process_util_test_die_immediately", false);
 836   ASSERT_TRUE(child_process);
 837   // Give it time to die.
 838   sleep(2);
 839   base::EnsureProcessTerminated(child_process);
 840
 841   // Check that process was really killed.
 842   EXPECT_TRUE(IsProcessDead(child_process));
 843   base::CloseProcessHandle(child_process);
 844 }
 845
 846 MULTIPROCESS_TEST_MAIN(process_util_test_die_immediately) {
 847   return 0;
 848 }
 849
 850 #endif  // defined(OS_POSIX)