The Tor Browser: media/webrtc/trunk/testing/gtest/src/gtest-death-test.cc@deefc01c0e14 (annotated)

media/webrtc/trunk/testing/gtest/src/gtest-death-test.cc@deefc01c0e14 (annotated)

media/webrtc/trunk/testing/gtest/src/gtest-death-test.cc

Thu, 15 Jan 2015 21:03:48 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Thu, 15 Jan 2015 21:03:48 +0100
branch: TOR_BUG_9701
changeset 11: deefc01c0e14
permissions: -rw-r--r--

Integrate friendly tips from Tor colleagues to make (or not) 4.5 alpha 3;
This includes removal of overloaded (but unused) methods, and addition of
a overlooked call to DataStruct::SetData(nsISupports, uint32_t, bool.)

 // Copyright 2005, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 // notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 // copyright notice, this list of conditions and the following disclaimer
 // in the documentation and/or other materials provided with the
 // distribution.
 //     * Neither the name of Google Inc. nor the names of its
 // contributors may be used to endorse or promote products derived from
 // this software without specific prior written permission.
 //
 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 //
 // Author: wan@google.com (Zhanyong Wan), vladl@google.com (Vlad Losev)
 //
 // This file implements death tests.
 #include "gtest/gtest-death-test.h"
 #include "gtest/internal/gtest-port.h"
 #if GTEST_HAS_DEATH_TEST
 # if GTEST_OS_MAC
 #  include <crt_externs.h>
 # endif  // GTEST_OS_MAC
 # include <errno.h>
 # include <fcntl.h>
 # include <limits.h>
 # if GTEST_OS_LINUX
 #  include <signal.h>
 # endif  // GTEST_OS_LINUX
 # include <stdarg.h>
 # if GTEST_OS_WINDOWS
 #  include <windows.h>
 # else
 #  include <sys/mman.h>
 #  include <sys/wait.h>
 # endif  // GTEST_OS_WINDOWS
 # if GTEST_OS_QNX
 #  include <spawn.h>
 # endif  // GTEST_OS_QNX
 #endif  // GTEST_HAS_DEATH_TEST
 #include "gtest/gtest-message.h"
 #include "gtest/internal/gtest-string.h"
 // Indicates that this translation unit is part of Google Test's
 // implementation.  It must come before gtest-internal-inl.h is
 // included, or there will be a compiler error.  This trick is to
 // prevent a user from accidentally including gtest-internal-inl.h in
 // his code.
 #define GTEST_IMPLEMENTATION_ 1
 #include "src/gtest-internal-inl.h"
 #undef GTEST_IMPLEMENTATION_
 namespace testing {
 // Constants.
 // The default death test style.
 static const char kDefaultDeathTestStyle[] = "fast";
 GTEST_DEFINE_string_(
     death_test_style,
     internal::StringFromGTestEnv("death_test_style", kDefaultDeathTestStyle),
     "Indicates how to run a death test in a forked child process: "
     "\"threadsafe\" (child process re-executes the test binary "
     "from the beginning, running only the specific death test) or "
     "\"fast\" (child process runs the death test immediately "
     "after forking).");
 GTEST_DEFINE_bool_(
     death_test_use_fork,
     internal::BoolFromGTestEnv("death_test_use_fork", false),
     "Instructs to use fork()/_exit() instead of clone() in death tests. "
     "Ignored and always uses fork() on POSIX systems where clone() is not "
     "implemented. Useful when running under valgrind or similar tools if "
     "those do not support clone(). Valgrind 3.3.1 will just fail if "
     "it sees an unsupported combination of clone() flags. "
     "It is not recommended to use this flag w/o valgrind though it will "
     "work in 99% of the cases. Once valgrind is fixed, this flag will "
     "most likely be removed.");
 namespace internal {
 GTEST_DEFINE_string_(
     internal_run_death_test, "",
     "Indicates the file, line number, temporal index of "
     "the single death test to run, and a file descriptor to "
     "which a success code may be sent, all separated by "
     "the '|' characters.  This flag is specified if and only if the current "
     "process is a sub-process launched for running a thread-safe "
     "death test.  FOR INTERNAL USE ONLY.");
 }  // namespace internal
 #if GTEST_HAS_DEATH_TEST
 namespace internal {
 // Valid only for fast death tests. Indicates the code is running in the
 // child process of a fast style death test.
 static bool g_in_fast_death_test_child = false;
 // Returns a Boolean value indicating whether the caller is currently
 // executing in the context of the death test child process.  Tools such as
 // Valgrind heap checkers may need this to modify their behavior in death
 // tests.  IMPORTANT: This is an internal utility.  Using it may break the
 // implementation of death tests.  User code MUST NOT use it.
 bool InDeathTestChild() {
 # if GTEST_OS_WINDOWS
   // On Windows, death tests are thread-safe regardless of the value of the
   // death_test_style flag.
   return !GTEST_FLAG(internal_run_death_test).empty();
 # else
   if (GTEST_FLAG(death_test_style) == "threadsafe")
     return !GTEST_FLAG(internal_run_death_test).empty();
   else
     return g_in_fast_death_test_child;
 #endif
 }
 }  // namespace internal
 // ExitedWithCode constructor.
 ExitedWithCode::ExitedWithCode(int exit_code) : exit_code_(exit_code) {
 }
 // ExitedWithCode function-call operator.
 bool ExitedWithCode::operator()(int exit_status) const {
 # if GTEST_OS_WINDOWS
   return exit_status == exit_code_;
 # else
   return WIFEXITED(exit_status) && WEXITSTATUS(exit_status) == exit_code_;
 # endif  // GTEST_OS_WINDOWS
 }
 # if !GTEST_OS_WINDOWS
 // KilledBySignal constructor.
 KilledBySignal::KilledBySignal(int signum) : signum_(signum) {
 }
 // KilledBySignal function-call operator.
 bool KilledBySignal::operator()(int exit_status) const {
   return WIFSIGNALED(exit_status) && WTERMSIG(exit_status) == signum_;
 }
 # endif  // !GTEST_OS_WINDOWS
 namespace internal {
 // Utilities needed for death tests.
 // Generates a textual description of a given exit code, in the format
 // specified by wait(2).
 static String ExitSummary(int exit_code) {
   Message m;
 # if GTEST_OS_WINDOWS
   m << "Exited with exit status " << exit_code;
 # else
   if (WIFEXITED(exit_code)) {
     m << "Exited with exit status " << WEXITSTATUS(exit_code);
   } else if (WIFSIGNALED(exit_code)) {
     m << "Terminated by signal " << WTERMSIG(exit_code);
   }
 #  ifdef WCOREDUMP
   if (WCOREDUMP(exit_code)) {
     m << " (core dumped)";
   }
 #  endif
 # endif  // GTEST_OS_WINDOWS
   return m.GetString();
 }
 // Returns true if exit_status describes a process that was terminated
 // by a signal, or exited normally with a nonzero exit code.
 bool ExitedUnsuccessfully(int exit_status) {
   return !ExitedWithCode(0)(exit_status);
 }
 # if !GTEST_OS_WINDOWS
 // Generates a textual failure message when a death test finds more than
 // one thread running, or cannot determine the number of threads, prior
 // to executing the given statement.  It is the responsibility of the
 // caller not to pass a thread_count of 1.
 static String DeathTestThreadWarning(size_t thread_count) {
   Message msg;
   msg << "Death tests use fork(), which is unsafe particularly"
       << " in a threaded context. For this test, " << GTEST_NAME_ << " ";
   if (thread_count == 0)
     msg << "couldn't detect the number of threads.";
   else
     msg << "detected " << thread_count << " threads.";
   return msg.GetString();
 }
 # endif  // !GTEST_OS_WINDOWS
 // Flag characters for reporting a death test that did not die.
 static const char kDeathTestLived = 'L';
 static const char kDeathTestReturned = 'R';
 static const char kDeathTestThrew = 'T';
 static const char kDeathTestInternalError = 'I';
 // An enumeration describing all of the possible ways that a death test can
 // conclude.  DIED means that the process died while executing the test
 // code; LIVED means that process lived beyond the end of the test code;
 // RETURNED means that the test statement attempted to execute a return
 // statement, which is not allowed; THREW means that the test statement
 // returned control by throwing an exception.  IN_PROGRESS means the test
 // has not yet concluded.
 // TODO(vladl@google.com): Unify names and possibly values for
 // AbortReason, DeathTestOutcome, and flag characters above.
 enum DeathTestOutcome { IN_PROGRESS, DIED, LIVED, RETURNED, THREW };
 // Routine for aborting the program which is safe to call from an
 // exec-style death test child process, in which case the error
 // message is propagated back to the parent process.  Otherwise, the
 // message is simply printed to stderr.  In either case, the program
 // then exits with status 1.
 void DeathTestAbort(const String& message) {
   // On a POSIX system, this function may be called from a threadsafe-style
   // death test child process, which operates on a very small stack.  Use
   // the heap for any additional non-minuscule memory requirements.
   const InternalRunDeathTestFlag* const flag =
       GetUnitTestImpl()->internal_run_death_test_flag();
   if (flag != NULL) {
     FILE* parent = posix::FDOpen(flag->write_fd(), "w");
     fputc(kDeathTestInternalError, parent);
     fprintf(parent, "%s", message.c_str());
     fflush(parent);
     _exit(1);
   } else {
     fprintf(stderr, "%s", message.c_str());
     fflush(stderr);
     posix::Abort();
   }
 }
 // A replacement for CHECK that calls DeathTestAbort if the assertion
 // fails.
 # define GTEST_DEATH_TEST_CHECK_(expression) \
   do { \
     if (!::testing::internal::IsTrue(expression)) { \
       DeathTestAbort(::testing::internal::String::Format( \
           "CHECK failed: File %s, line %d: %s", \
           __FILE__, __LINE__, #expression)); \
     } \
   } while (::testing::internal::AlwaysFalse())
 // This macro is similar to GTEST_DEATH_TEST_CHECK_, but it is meant for
 // evaluating any system call that fulfills two conditions: it must return
 // -1 on failure, and set errno to EINTR when it is interrupted and
 // should be tried again.  The macro expands to a loop that repeatedly
 // evaluates the expression as long as it evaluates to -1 and sets
 // errno to EINTR.  If the expression evaluates to -1 but errno is
 // something other than EINTR, DeathTestAbort is called.
 # define GTEST_DEATH_TEST_CHECK_SYSCALL_(expression) \
   do { \
     int gtest_retval; \
     do { \
       gtest_retval = (expression); \
     } while (gtest_retval == -1 && errno == EINTR); \
     if (gtest_retval == -1) { \
       DeathTestAbort(::testing::internal::String::Format( \
           "CHECK failed: File %s, line %d: %s != -1", \
           __FILE__, __LINE__, #expression)); \
     } \
   } while (::testing::internal::AlwaysFalse())
 // Returns the message describing the last system error in errno.
 String GetLastErrnoDescription() {
     return String(errno == 0 ? "" : posix::StrError(errno));
 }
 // This is called from a death test parent process to read a failure
 // message from the death test child process and log it with the FATAL
 // severity. On Windows, the message is read from a pipe handle. On other
 // platforms, it is read from a file descriptor.
 static void FailFromInternalError(int fd) {
   Message error;
   char buffer[256];
   int num_read;
   do {
     while ((num_read = posix::Read(fd, buffer, 255)) > 0) {
       buffer[num_read] = '\0';
       error << buffer;
     }
   } while (num_read == -1 && errno == EINTR);
   if (num_read == 0) {
     GTEST_LOG_(FATAL) << error.GetString();
   } else {
     const int last_error = errno;
     GTEST_LOG_(FATAL) << "Error while reading death test internal: "
                       << GetLastErrnoDescription() << " [" << last_error << "]";
   }
 }
 // Death test constructor.  Increments the running death test count
 // for the current test.
 DeathTest::DeathTest() {
   TestInfo* const info = GetUnitTestImpl()->current_test_info();
   if (info == NULL) {
     DeathTestAbort("Cannot run a death test outside of a TEST or "
                    "TEST_F construct");
   }
 }
 // Creates and returns a death test by dispatching to the current
 // death test factory.
 bool DeathTest::Create(const char* statement, const RE* regex,
                        const char* file, int line, DeathTest** test) {
   return GetUnitTestImpl()->death_test_factory()->Create(
       statement, regex, file, line, test);
 }
 const char* DeathTest::LastMessage() {
   return last_death_test_message_.c_str();
 }
 void DeathTest::set_last_death_test_message(const String& message) {
   last_death_test_message_ = message;
 }
 String DeathTest::last_death_test_message_;
 // Provides cross platform implementation for some death functionality.
 class DeathTestImpl : public DeathTest {
  protected:
   DeathTestImpl(const char* a_statement, const RE* a_regex)
       : statement_(a_statement),
         regex_(a_regex),
         spawned_(false),
         status_(-1),
         outcome_(IN_PROGRESS),
         read_fd_(-1),
         write_fd_(-1) {}
   // read_fd_ is expected to be closed and cleared by a derived class.
   ~DeathTestImpl() { GTEST_DEATH_TEST_CHECK_(read_fd_ == -1); }
   void Abort(AbortReason reason);
   virtual bool Passed(bool status_ok);
   const char* statement() const { return statement_; }
   const RE* regex() const { return regex_; }
   bool spawned() const { return spawned_; }
   void set_spawned(bool is_spawned) { spawned_ = is_spawned; }
   int status() const { return status_; }
   void set_status(int a_status) { status_ = a_status; }
   DeathTestOutcome outcome() const { return outcome_; }
   void set_outcome(DeathTestOutcome an_outcome) { outcome_ = an_outcome; }
   int read_fd() const { return read_fd_; }
   void set_read_fd(int fd) { read_fd_ = fd; }
   int write_fd() const { return write_fd_; }
   void set_write_fd(int fd) { write_fd_ = fd; }
   // Called in the parent process only. Reads the result code of the death
   // test child process via a pipe, interprets it to set the outcome_
   // member, and closes read_fd_.  Outputs diagnostics and terminates in
   // case of unexpected codes.
   void ReadAndInterpretStatusByte();
  private:
   // The textual content of the code this object is testing.  This class
   // doesn't own this string and should not attempt to delete it.
   const char* const statement_;
   // The regular expression which test output must match.  DeathTestImpl
   // doesn't own this object and should not attempt to delete it.
   const RE* const regex_;
   // True if the death test child process has been successfully spawned.
   bool spawned_;
   // The exit status of the child process.
   int status_;
   // How the death test concluded.
   DeathTestOutcome outcome_;
   // Descriptor to the read end of the pipe to the child process.  It is
   // always -1 in the child process.  The child keeps its write end of the
   // pipe in write_fd_.
   int read_fd_;
   // Descriptor to the child's write end of the pipe to the parent process.
   // It is always -1 in the parent process.  The parent keeps its end of the
   // pipe in read_fd_.
   int write_fd_;
 };
 // Called in the parent process only. Reads the result code of the death
 // test child process via a pipe, interprets it to set the outcome_
 // member, and closes read_fd_.  Outputs diagnostics and terminates in
 // case of unexpected codes.
 void DeathTestImpl::ReadAndInterpretStatusByte() {
   char flag;
   int bytes_read;
   // The read() here blocks until data is available (signifying the
   // failure of the death test) or until the pipe is closed (signifying
   // its success), so it's okay to call this in the parent before
   // the child process has exited.
   do {
     bytes_read = posix::Read(read_fd(), &flag, 1);
   } while (bytes_read == -1 && errno == EINTR);
   if (bytes_read == 0) {
     set_outcome(DIED);
   } else if (bytes_read == 1) {
     switch (flag) {
       case kDeathTestReturned:
         set_outcome(RETURNED);
         break;
       case kDeathTestThrew:
         set_outcome(THREW);
         break;
       case kDeathTestLived:
         set_outcome(LIVED);
         break;
       case kDeathTestInternalError:
         FailFromInternalError(read_fd());  // Does not return.
         break;
       default:
         GTEST_LOG_(FATAL) << "Death test child process reported "
                           << "unexpected status byte ("
                           << static_cast<unsigned int>(flag) << ")";
     }
   } else {
     GTEST_LOG_(FATAL) << "Read from death test child process failed: "
                       << GetLastErrnoDescription();
   }
   GTEST_DEATH_TEST_CHECK_SYSCALL_(posix::Close(read_fd()));
   set_read_fd(-1);
 }
 // Signals that the death test code which should have exited, didn't.
 // Should be called only in a death test child process.
 // Writes a status byte to the child's status file descriptor, then
 // calls _exit(1).
 void DeathTestImpl::Abort(AbortReason reason) {
   // The parent process considers the death test to be a failure if
   // it finds any data in our pipe.  So, here we write a single flag byte
   // to the pipe, then exit.
   const char status_ch =
       reason == TEST_DID_NOT_DIE ? kDeathTestLived :
       reason == TEST_THREW_EXCEPTION ? kDeathTestThrew : kDeathTestReturned;
   GTEST_DEATH_TEST_CHECK_SYSCALL_(posix::Write(write_fd(), &status_ch, 1));
   // We are leaking the descriptor here because on some platforms (i.e.,
   // when built as Windows DLL), destructors of global objects will still
   // run after calling _exit(). On such systems, write_fd_ will be
   // indirectly closed from the destructor of UnitTestImpl, causing double
   // close if it is also closed here. On debug configurations, double close
   // may assert. As there are no in-process buffers to flush here, we are
   // relying on the OS to close the descriptor after the process terminates
   // when the destructors are not run.
   _exit(1);  // Exits w/o any normal exit hooks (we were supposed to crash)
 }
 // Returns an indented copy of stderr output for a death test.
 // This makes distinguishing death test output lines from regular log lines
 // much easier.
 static ::std::string FormatDeathTestOutput(const ::std::string& output) {
   ::std::string ret;
   for (size_t at = 0; ; ) {
     const size_t line_end = output.find('\n', at);
     ret += "[  DEATH   ] ";
     if (line_end == ::std::string::npos) {
       ret += output.substr(at);
       break;
     }
     ret += output.substr(at, line_end + 1 - at);
     at = line_end + 1;
   }
   return ret;
 }
 // Assesses the success or failure of a death test, using both private
 // members which have previously been set, and one argument:
 //
 // Private data members:
 //   outcome:  An enumeration describing how the death test
 //             concluded: DIED, LIVED, THREW, or RETURNED.  The death test
 //             fails in the latter three cases.
 //   status:   The exit status of the child process. On *nix, it is in the
 //             in the format specified by wait(2). On Windows, this is the
 //             value supplied to the ExitProcess() API or a numeric code
 //             of the exception that terminated the program.
 //   regex:    A regular expression object to be applied to
 //             the test's captured standard error output; the death test
 //             fails if it does not match.
 //
 // Argument:
 //   status_ok: true if exit_status is acceptable in the context of
 //              this particular death test, which fails if it is false
 //
 // Returns true iff all of the above conditions are met.  Otherwise, the
 // first failing condition, in the order given above, is the one that is
 // reported. Also sets the last death test message string.
 bool DeathTestImpl::Passed(bool status_ok) {
   if (!spawned())
     return false;
   const String error_message = GetCapturedStderr();
   bool success = false;
   Message buffer;
   buffer << "Death test: " << statement() << "\n";
   switch (outcome()) {
     case LIVED:
       buffer << "    Result: failed to die.\n"
              << " Error msg:\n" << FormatDeathTestOutput(error_message);
       break;
     case THREW:
       buffer << "    Result: threw an exception.\n"
              << " Error msg:\n" << FormatDeathTestOutput(error_message);
       break;
     case RETURNED:
       buffer << "    Result: illegal return in test statement.\n"
              << " Error msg:\n" << FormatDeathTestOutput(error_message);
       break;
     case DIED:
       if (status_ok) {
         const bool matched = RE::PartialMatch(error_message.c_str(), *regex());
         if (matched) {
           success = true;
         } else {
           buffer << "    Result: died but not with expected error.\n"
                  << "  Expected: " << regex()->pattern() << "\n"
                  << "Actual msg:\n" << FormatDeathTestOutput(error_message);
         }
       } else {
         buffer << "    Result: died but not with expected exit code:\n"
                << "            " << ExitSummary(status()) << "\n"
                << "Actual msg:\n" << FormatDeathTestOutput(error_message);
       }
       break;
     case IN_PROGRESS:
     default:
       GTEST_LOG_(FATAL)
           << "DeathTest::Passed somehow called before conclusion of test";
   }
   DeathTest::set_last_death_test_message(buffer.GetString());
   return success;
 }
 # if GTEST_OS_WINDOWS
 // WindowsDeathTest implements death tests on Windows. Due to the
 // specifics of starting new processes on Windows, death tests there are
 // always threadsafe, and Google Test considers the
 // --gtest_death_test_style=fast setting to be equivalent to
 // --gtest_death_test_style=threadsafe there.
 //
 // A few implementation notes:  Like the Linux version, the Windows
 // implementation uses pipes for child-to-parent communication. But due to
 // the specifics of pipes on Windows, some extra steps are required:
 //
 // 1. The parent creates a communication pipe and stores handles to both
 //    ends of it.
 // 2. The parent starts the child and provides it with the information
 //    necessary to acquire the handle to the write end of the pipe.
 // 3. The child acquires the write end of the pipe and signals the parent
 //    using a Windows event.
 // 4. Now the parent can release the write end of the pipe on its side. If
 //    this is done before step 3, the object's reference count goes down to
 //    0 and it is destroyed, preventing the child from acquiring it. The
 //    parent now has to release it, or read operations on the read end of
 //    the pipe will not return when the child terminates.
 // 5. The parent reads child's output through the pipe (outcome code and
 //    any possible error messages) from the pipe, and its stderr and then
 //    determines whether to fail the test.
 //
 // Note: to distinguish Win32 API calls from the local method and function
 // calls, the former are explicitly resolved in the global namespace.
 //
 class WindowsDeathTest : public DeathTestImpl {
  public:
   WindowsDeathTest(const char* a_statement,
                    const RE* a_regex,
                    const char* file,
                    int line)
       : DeathTestImpl(a_statement, a_regex), file_(file), line_(line) {}
   // All of these virtual functions are inherited from DeathTest.
   virtual int Wait();
   virtual TestRole AssumeRole();
  private:
   // The name of the file in which the death test is located.
   const char* const file_;
   // The line number on which the death test is located.
   const int line_;
   // Handle to the write end of the pipe to the child process.
   AutoHandle write_handle_;
   // Child process handle.
   AutoHandle child_handle_;
   // Event the child process uses to signal the parent that it has
   // acquired the handle to the write end of the pipe. After seeing this
   // event the parent can release its own handles to make sure its
   // ReadFile() calls return when the child terminates.
   AutoHandle event_handle_;
 };
 // Waits for the child in a death test to exit, returning its exit
 // status, or 0 if no child process exists.  As a side effect, sets the
 // outcome data member.
 int WindowsDeathTest::Wait() {
   if (!spawned())
     return 0;
   // Wait until the child either signals that it has acquired the write end
   // of the pipe or it dies.
   const HANDLE wait_handles[2] = { child_handle_.Get(), event_handle_.Get() };
   switch (::WaitForMultipleObjects(2,
                                    wait_handles,
                                    FALSE,  // Waits for any of the handles.
                                    INFINITE)) {
     case WAIT_OBJECT_0:
     case WAIT_OBJECT_0 + 1:
       break;
     default:
       GTEST_DEATH_TEST_CHECK_(false);  // Should not get here.
   }
   // The child has acquired the write end of the pipe or exited.
   // We release the handle on our side and continue.
   write_handle_.Reset();
   event_handle_.Reset();
   ReadAndInterpretStatusByte();
   // Waits for the child process to exit if it haven't already. This
   // returns immediately if the child has already exited, regardless of
   // whether previous calls to WaitForMultipleObjects synchronized on this
   // handle or not.
   GTEST_DEATH_TEST_CHECK_(
       WAIT_OBJECT_0 == ::WaitForSingleObject(child_handle_.Get(),
                                              INFINITE));
   DWORD status_code;
   GTEST_DEATH_TEST_CHECK_(
       ::GetExitCodeProcess(child_handle_.Get(), &status_code) != FALSE);
   child_handle_.Reset();
   set_status(static_cast<int>(status_code));
   return status();
 }
 // The AssumeRole process for a Windows death test.  It creates a child
 // process with the same executable as the current process to run the
 // death test.  The child process is given the --gtest_filter and
 // --gtest_internal_run_death_test flags such that it knows to run the
 // current death test only.
 DeathTest::TestRole WindowsDeathTest::AssumeRole() {
   const UnitTestImpl* const impl = GetUnitTestImpl();
   const InternalRunDeathTestFlag* const flag =
       impl->internal_run_death_test_flag();
   const TestInfo* const info = impl->current_test_info();
   const int death_test_index = info->result()->death_test_count();
   if (flag != NULL) {
     // ParseInternalRunDeathTestFlag() has performed all the necessary
     // processing.
     set_write_fd(flag->write_fd());
     return EXECUTE_TEST;
   }
   // WindowsDeathTest uses an anonymous pipe to communicate results of
   // a death test.
   SECURITY_ATTRIBUTES handles_are_inheritable = {
     sizeof(SECURITY_ATTRIBUTES), NULL, TRUE };
   HANDLE read_handle, write_handle;
   GTEST_DEATH_TEST_CHECK_(
       ::CreatePipe(&read_handle, &write_handle, &handles_are_inheritable,
 )  // Default buffer size.
       != FALSE);
   set_read_fd(::_open_osfhandle(reinterpret_cast<intptr_t>(read_handle),
                                 O_RDONLY));
   write_handle_.Reset(write_handle);
   event_handle_.Reset(::CreateEvent(
       &handles_are_inheritable,
       TRUE,    // The event will automatically reset to non-signaled state.
       FALSE,   // The initial state is non-signalled.
       NULL));  // The even is unnamed.
   GTEST_DEATH_TEST_CHECK_(event_handle_.Get() != NULL);
   const String filter_flag = String::Format("--%s%s=%s.%s",
                                             GTEST_FLAG_PREFIX_, kFilterFlag,
                                             info->test_case_name(),
                                             info->name());
   const String internal_flag = String::Format(
     "--%s%s=%s|%d|%d|%u|%Iu|%Iu",
       GTEST_FLAG_PREFIX_,
       kInternalRunDeathTestFlag,
       file_, line_,
       death_test_index,
       static_cast<unsigned int>(::GetCurrentProcessId()),
       // size_t has the same with as pointers on both 32-bit and 64-bit
       // Windows platforms.
       // See http://msdn.microsoft.com/en-us/library/tcxf1dw6.aspx.
       reinterpret_cast<size_t>(write_handle),
       reinterpret_cast<size_t>(event_handle_.Get()));
   char executable_path[_MAX_PATH + 1];  // NOLINT
   GTEST_DEATH_TEST_CHECK_(
       _MAX_PATH + 1 != ::GetModuleFileNameA(NULL,
                                             executable_path,
                                             _MAX_PATH));
   String command_line = String::Format("%s %s \"%s\"",
                                        ::GetCommandLineA(),
                                        filter_flag.c_str(),
                                        internal_flag.c_str());
   DeathTest::set_last_death_test_message("");
   CaptureStderr();
   // Flush the log buffers since the log streams are shared with the child.
   FlushInfoLog();
   // The child process will share the standard handles with the parent.
   STARTUPINFOA startup_info;
   memset(&startup_info, 0, sizeof(STARTUPINFO));
   startup_info.dwFlags = STARTF_USESTDHANDLES;
   startup_info.hStdInput = ::GetStdHandle(STD_INPUT_HANDLE);
   startup_info.hStdOutput = ::GetStdHandle(STD_OUTPUT_HANDLE);
   startup_info.hStdError = ::GetStdHandle(STD_ERROR_HANDLE);
   PROCESS_INFORMATION process_info;
   GTEST_DEATH_TEST_CHECK_(::CreateProcessA(
       executable_path,
       const_cast<char*>(command_line.c_str()),
       NULL,   // Retuned process handle is not inheritable.
       NULL,   // Retuned thread handle is not inheritable.
       TRUE,   // Child inherits all inheritable handles (for write_handle_).
 x0,    // Default creation flags.
       NULL,   // Inherit the parent's environment.
       UnitTest::GetInstance()->original_working_dir(),
       &startup_info,
       &process_info) != FALSE);
   child_handle_.Reset(process_info.hProcess);
   ::CloseHandle(process_info.hThread);
   set_spawned(true);
   return OVERSEE_TEST;
 }
 # else  // We are not on Windows.
 // ForkingDeathTest provides implementations for most of the abstract
 // methods of the DeathTest interface.  Only the AssumeRole method is
 // left undefined.
 class ForkingDeathTest : public DeathTestImpl {
  public:
   ForkingDeathTest(const char* statement, const RE* regex);
   // All of these virtual functions are inherited from DeathTest.
   virtual int Wait();
  protected:
   void set_child_pid(pid_t child_pid) { child_pid_ = child_pid; }
  private:
   // PID of child process during death test; 0 in the child process itself.
   pid_t child_pid_;
 };
 // Constructs a ForkingDeathTest.
 ForkingDeathTest::ForkingDeathTest(const char* a_statement, const RE* a_regex)
     : DeathTestImpl(a_statement, a_regex),
       child_pid_(-1) {}
 // Waits for the child in a death test to exit, returning its exit
 // status, or 0 if no child process exists.  As a side effect, sets the
 // outcome data member.
 int ForkingDeathTest::Wait() {
   if (!spawned())
     return 0;
   ReadAndInterpretStatusByte();
   int status_value;
   GTEST_DEATH_TEST_CHECK_SYSCALL_(waitpid(child_pid_, &status_value, 0));
   set_status(status_value);
   return status_value;
 }
 // A concrete death test class that forks, then immediately runs the test
 // in the child process.
 class NoExecDeathTest : public ForkingDeathTest {
  public:
   NoExecDeathTest(const char* a_statement, const RE* a_regex) :
       ForkingDeathTest(a_statement, a_regex) { }
   virtual TestRole AssumeRole();
 };
 // The AssumeRole process for a fork-and-run death test.  It implements a
 // straightforward fork, with a simple pipe to transmit the status byte.
 DeathTest::TestRole NoExecDeathTest::AssumeRole() {
   const size_t thread_count = GetThreadCount();
   if (thread_count != 1) {
     GTEST_LOG_(WARNING) << DeathTestThreadWarning(thread_count);
   }
   int pipe_fd[2];
   GTEST_DEATH_TEST_CHECK_(pipe(pipe_fd) != -1);
   DeathTest::set_last_death_test_message("");
   CaptureStderr();
   // When we fork the process below, the log file buffers are copied, but the
   // file descriptors are shared.  We flush all log files here so that closing
   // the file descriptors in the child process doesn't throw off the
   // synchronization between descriptors and buffers in the parent process.
   // This is as close to the fork as possible to avoid a race condition in case
   // there are multiple threads running before the death test, and another
   // thread writes to the log file.
   FlushInfoLog();
   const pid_t child_pid = fork();
   GTEST_DEATH_TEST_CHECK_(child_pid != -1);
   set_child_pid(child_pid);
   if (child_pid == 0) {
     GTEST_DEATH_TEST_CHECK_SYSCALL_(close(pipe_fd[0]));
     set_write_fd(pipe_fd[1]);
     // Redirects all logging to stderr in the child process to prevent
     // concurrent writes to the log files.  We capture stderr in the parent
     // process and append the child process' output to a log.
     LogToStderr();
     // Event forwarding to the listeners of event listener API mush be shut
     // down in death test subprocesses.
     GetUnitTestImpl()->listeners()->SuppressEventForwarding();
     g_in_fast_death_test_child = true;
     return EXECUTE_TEST;
   } else {
     GTEST_DEATH_TEST_CHECK_SYSCALL_(close(pipe_fd[1]));
     set_read_fd(pipe_fd[0]);
     set_spawned(true);
     return OVERSEE_TEST;
   }
 }
 // A concrete death test class that forks and re-executes the main
 // program from the beginning, with command-line flags set that cause
 // only this specific death test to be run.
 class ExecDeathTest : public ForkingDeathTest {
  public:
   ExecDeathTest(const char* a_statement, const RE* a_regex,
                 const char* file, int line) :
       ForkingDeathTest(a_statement, a_regex), file_(file), line_(line) { }
   virtual TestRole AssumeRole();
  private:
   static ::std::vector<testing::internal::string>
   GetArgvsForDeathTestChildProcess() {
     ::std::vector<testing::internal::string> args = GetInjectableArgvs();
     return args;
   }
   // The name of the file in which the death test is located.
   const char* const file_;
   // The line number on which the death test is located.
   const int line_;
 };
 // Utility class for accumulating command-line arguments.
 class Arguments {
  public:
   Arguments() {
     args_.push_back(NULL);
   }
   ~Arguments() {
     for (std::vector<char*>::iterator i = args_.begin(); i != args_.end();
          ++i) {
       free(*i);
     }
   }
   void AddArgument(const char* argument) {
     args_.insert(args_.end() - 1, posix::StrDup(argument));
   }
   template <typename Str>
   void AddArguments(const ::std::vector<Str>& arguments) {
     for (typename ::std::vector<Str>::const_iterator i = arguments.begin();
          i != arguments.end();
          ++i) {
       args_.insert(args_.end() - 1, posix::StrDup(i->c_str()));
     }
   }
   char* const* Argv() {
     return &args_[0];
   }
  private:
   std::vector<char*> args_;
 };
 // A struct that encompasses the arguments to the child process of a
 // threadsafe-style death test process.
 struct ExecDeathTestArgs {
   char* const* argv;  // Command-line arguments for the child's call to exec
   int close_fd;       // File descriptor to close; the read end of a pipe
 };
 #  if GTEST_OS_MAC
 inline char** GetEnviron() {
   // When Google Test is built as a framework on MacOS X, the environ variable
   // is unavailable. Apple's documentation (man environ) recommends using
   // _NSGetEnviron() instead.
   return *_NSGetEnviron();
 }
 #  else
 // Some POSIX platforms expect you to declare environ. extern "C" makes
 // it reside in the global namespace.
 extern "C" __attribute__ ((visibility ("default"))) char** environ;
 inline char** GetEnviron() { return environ; }
 #  endif  // GTEST_OS_MAC
 #  if !GTEST_OS_QNX
 // The main function for a threadsafe-style death test child process.
 // This function is called in a clone()-ed process and thus must avoid
 // any potentially unsafe operations like malloc or libc functions.
 static int ExecDeathTestChildMain(void* child_arg) {
   ExecDeathTestArgs* const args = static_cast<ExecDeathTestArgs*>(child_arg);
   GTEST_DEATH_TEST_CHECK_SYSCALL_(close(args->close_fd));
   // We need to execute the test program in the same environment where
   // it was originally invoked.  Therefore we change to the original
   // working directory first.
   const char* const original_dir =
       UnitTest::GetInstance()->original_working_dir();
   // We can safely call chdir() as it's a direct system call.
   if (chdir(original_dir) != 0) {
     DeathTestAbort(String::Format("chdir(\"%s\") failed: %s",
                                   original_dir,
                                   GetLastErrnoDescription().c_str()));
     return EXIT_FAILURE;
   }
   // We can safely call execve() as it's a direct system call.  We
   // cannot use execvp() as it's a libc function and thus potentially
   // unsafe.  Since execve() doesn't search the PATH, the user must
   // invoke the test program via a valid path that contains at least
   // one path separator.
   execve(args->argv[0], args->argv, GetEnviron());
   DeathTestAbort(String::Format("execve(%s, ...) in %s failed: %s",
                                 args->argv[0],
                                 original_dir,
                                 GetLastErrnoDescription().c_str()));
   return EXIT_FAILURE;
 }
 #  endif  // !GTEST_OS_QNX
 // Two utility routines that together determine the direction the stack
 // grows.
 // This could be accomplished more elegantly by a single recursive
 // function, but we want to guard against the unlikely possibility of
 // a smart compiler optimizing the recursion away.
 //
 // GTEST_NO_INLINE_ is required to prevent GCC 4.6 from inlining
 // StackLowerThanAddress into StackGrowsDown, which then doesn't give
 // correct answer.
 void StackLowerThanAddress(const void* ptr, bool* result) GTEST_NO_INLINE_;
 void StackLowerThanAddress(const void* ptr, bool* result) {
   int dummy;
   *result = (&dummy < ptr);
 }
 bool StackGrowsDown() {
   int dummy;
   bool result;
   StackLowerThanAddress(&dummy, &result);
   return result;
 }
 // Spawns a child process with the same executable as the current process in
 // a thread-safe manner and instructs it to run the death test.  The
 // implementation uses fork(2) + exec.  On systems where clone(2) is
 // available, it is used instead, being slightly more thread-safe.  On QNX,
 // fork supports only single-threaded environments, so this function uses
 // spawn(2) there instead.  The function dies with an error message if
 // anything goes wrong.
 static pid_t ExecDeathTestSpawnChild(char* const* argv, int close_fd) {
   ExecDeathTestArgs args = { argv, close_fd };
   pid_t child_pid = -1;
 #  if GTEST_OS_QNX
   // Obtains the current directory and sets it to be closed in the child
   // process.
   const int cwd_fd = open(".", O_RDONLY);
   GTEST_DEATH_TEST_CHECK_(cwd_fd != -1);
   GTEST_DEATH_TEST_CHECK_SYSCALL_(fcntl(cwd_fd, F_SETFD, FD_CLOEXEC));
   // We need to execute the test program in the same environment where
   // it was originally invoked.  Therefore we change to the original
   // working directory first.
   const char* const original_dir =
       UnitTest::GetInstance()->original_working_dir();
   // We can safely call chdir() as it's a direct system call.
   if (chdir(original_dir) != 0) {
     DeathTestAbort(String::Format("chdir(\"%s\") failed: %s",
                                   original_dir,
                                   GetLastErrnoDescription().c_str()));
     return EXIT_FAILURE;
   }
   int fd_flags;
   // Set close_fd to be closed after spawn.
   GTEST_DEATH_TEST_CHECK_SYSCALL_(fd_flags = fcntl(close_fd, F_GETFD));
   GTEST_DEATH_TEST_CHECK_SYSCALL_(fcntl(close_fd, F_SETFD,
                                         fd_flags | FD_CLOEXEC));
   struct inheritance inherit = {0};
   // spawn is a system call.
   child_pid = spawn(args.argv[0], 0, NULL, &inherit, args.argv, GetEnviron());
   // Restores the current working directory.
   GTEST_DEATH_TEST_CHECK_(fchdir(cwd_fd) != -1);
   GTEST_DEATH_TEST_CHECK_SYSCALL_(close(cwd_fd));
 #  else   // GTEST_OS_QNX
 #   if GTEST_OS_LINUX
   // When a SIGPROF signal is received while fork() or clone() are executing,
   // the process may hang. To avoid this, we ignore SIGPROF here and re-enable
   // it after the call to fork()/clone() is complete.
   struct sigaction saved_sigprof_action;
   struct sigaction ignore_sigprof_action;
   memset(&ignore_sigprof_action, 0, sizeof(ignore_sigprof_action));
   sigemptyset(&ignore_sigprof_action.sa_mask);
   ignore_sigprof_action.sa_handler = SIG_IGN;
   GTEST_DEATH_TEST_CHECK_SYSCALL_(sigaction(
       SIGPROF, &ignore_sigprof_action, &saved_sigprof_action));
 #   endif  // GTEST_OS_LINUX
 #   if GTEST_HAS_CLONE
   const bool use_fork = GTEST_FLAG(death_test_use_fork);
   if (!use_fork) {
     static const bool stack_grows_down = StackGrowsDown();
     const size_t stack_size = getpagesize();
     // MMAP_ANONYMOUS is not defined on Mac, so we use MAP_ANON instead.
     void* const stack = mmap(NULL, stack_size, PROT_READ | PROT_WRITE,
                              MAP_ANON | MAP_PRIVATE, -1, 0);
     GTEST_DEATH_TEST_CHECK_(stack != MAP_FAILED);
     // Maximum stack alignment in bytes:  For a downward-growing stack, this
     // amount is subtracted from size of the stack space to get an address
     // that is within the stack space and is aligned on all systems we care
     // about.  As far as I know there is no ABI with stack alignment greater
     // than 64.  We assume stack and stack_size already have alignment of
     // kMaxStackAlignment.
     const size_t kMaxStackAlignment = 64;
     void* const stack_top =
         static_cast<char*>(stack) +
             (stack_grows_down ? stack_size - kMaxStackAlignment : 0);
     GTEST_DEATH_TEST_CHECK_(stack_size > kMaxStackAlignment &&
         reinterpret_cast<intptr_t>(stack_top) % kMaxStackAlignment == 0);
     child_pid = clone(&ExecDeathTestChildMain, stack_top, SIGCHLD, &args);
     GTEST_DEATH_TEST_CHECK_(munmap(stack, stack_size) != -1);
   }
 #   else
   const bool use_fork = true;
 #   endif  // GTEST_HAS_CLONE
   if (use_fork && (child_pid = fork()) == 0) {
       ExecDeathTestChildMain(&args);
       _exit(0);
   }
 #  endif  // GTEST_OS_QNX
 #  if GTEST_OS_LINUX
   GTEST_DEATH_TEST_CHECK_SYSCALL_(
       sigaction(SIGPROF, &saved_sigprof_action, NULL));
 #  endif  // GTEST_OS_LINUX
   GTEST_DEATH_TEST_CHECK_(child_pid != -1);
   return child_pid;
 }
 // The AssumeRole process for a fork-and-exec death test.  It re-executes the
 // main program from the beginning, setting the --gtest_filter
 // and --gtest_internal_run_death_test flags to cause only the current
 // death test to be re-run.
 DeathTest::TestRole ExecDeathTest::AssumeRole() {
   const UnitTestImpl* const impl = GetUnitTestImpl();
   const InternalRunDeathTestFlag* const flag =
       impl->internal_run_death_test_flag();
   const TestInfo* const info = impl->current_test_info();
   const int death_test_index = info->result()->death_test_count();
   if (flag != NULL) {
     set_write_fd(flag->write_fd());
     return EXECUTE_TEST;
   }
   int pipe_fd[2];
   GTEST_DEATH_TEST_CHECK_(pipe(pipe_fd) != -1);
   // Clear the close-on-exec flag on the write end of the pipe, lest
   // it be closed when the child process does an exec:
   GTEST_DEATH_TEST_CHECK_(fcntl(pipe_fd[1], F_SETFD, 0) != -1);
   const String filter_flag =
       String::Format("--%s%s=%s.%s",
                      GTEST_FLAG_PREFIX_, kFilterFlag,
                      info->test_case_name(), info->name());
   const String internal_flag =
       String::Format("--%s%s=%s|%d|%d|%d",
                      GTEST_FLAG_PREFIX_, kInternalRunDeathTestFlag,
                      file_, line_, death_test_index, pipe_fd[1]);
   Arguments args;
   args.AddArguments(GetArgvsForDeathTestChildProcess());
   args.AddArgument(filter_flag.c_str());
   args.AddArgument(internal_flag.c_str());
   DeathTest::set_last_death_test_message("");
   CaptureStderr();
   // See the comment in NoExecDeathTest::AssumeRole for why the next line
   // is necessary.
   FlushInfoLog();
   const pid_t child_pid = ExecDeathTestSpawnChild(args.Argv(), pipe_fd[0]);
   GTEST_DEATH_TEST_CHECK_SYSCALL_(close(pipe_fd[1]));
   set_child_pid(child_pid);
   set_read_fd(pipe_fd[0]);
   set_spawned(true);
   return OVERSEE_TEST;
 }
 # endif  // !GTEST_OS_WINDOWS
 // Creates a concrete DeathTest-derived class that depends on the
 // --gtest_death_test_style flag, and sets the pointer pointed to
 // by the "test" argument to its address.  If the test should be
 // skipped, sets that pointer to NULL.  Returns true, unless the
 // flag is set to an invalid value.
 bool DefaultDeathTestFactory::Create(const char* statement, const RE* regex,
                                      const char* file, int line,
                                      DeathTest** test) {
   UnitTestImpl* const impl = GetUnitTestImpl();
   const InternalRunDeathTestFlag* const flag =
       impl->internal_run_death_test_flag();
   const int death_test_index = impl->current_test_info()
       ->increment_death_test_count();
   if (flag != NULL) {
     if (death_test_index > flag->index()) {
       DeathTest::set_last_death_test_message(String::Format(
           "Death test count (%d) somehow exceeded expected maximum (%d)",
           death_test_index, flag->index()));
       return false;
     }
     if (!(flag->file() == file && flag->line() == line &&
           flag->index() == death_test_index)) {
       *test = NULL;
       return true;
     }
   }
 # if GTEST_OS_WINDOWS
   if (GTEST_FLAG(death_test_style) == "threadsafe" ||
       GTEST_FLAG(death_test_style) == "fast") {
     *test = new WindowsDeathTest(statement, regex, file, line);
   }
 # else
   if (GTEST_FLAG(death_test_style) == "threadsafe") {
     *test = new ExecDeathTest(statement, regex, file, line);
   } else if (GTEST_FLAG(death_test_style) == "fast") {
     *test = new NoExecDeathTest(statement, regex);
   }
 # endif  // GTEST_OS_WINDOWS
   else {  // NOLINT - this is more readable than unbalanced brackets inside #if.
     DeathTest::set_last_death_test_message(String::Format(
         "Unknown death test style \"%s\" encountered",
         GTEST_FLAG(death_test_style).c_str()));
     return false;
   }
   return true;
 }
 // Splits a given string on a given delimiter, populating a given
 // vector with the fields.  GTEST_HAS_DEATH_TEST implies that we have
 // ::std::string, so we can use it here.
 static void SplitString(const ::std::string& str, char delimiter,
                         ::std::vector< ::std::string>* dest) {
   ::std::vector< ::std::string> parsed;
   ::std::string::size_type pos = 0;
   while (::testing::internal::AlwaysTrue()) {
     const ::std::string::size_type colon = str.find(delimiter, pos);
     if (colon == ::std::string::npos) {
       parsed.push_back(str.substr(pos));
       break;
     } else {
       parsed.push_back(str.substr(pos, colon - pos));
       pos = colon + 1;
     }
   }
   dest->swap(parsed);
 }
 # if GTEST_OS_WINDOWS
 // Recreates the pipe and event handles from the provided parameters,
 // signals the event, and returns a file descriptor wrapped around the pipe
 // handle. This function is called in the child process only.
 int GetStatusFileDescriptor(unsigned int parent_process_id,
                             size_t write_handle_as_size_t,
                             size_t event_handle_as_size_t) {
   AutoHandle parent_process_handle(::OpenProcess(PROCESS_DUP_HANDLE,
                                                    FALSE,  // Non-inheritable.
                                                    parent_process_id));
   if (parent_process_handle.Get() == INVALID_HANDLE_VALUE) {
     DeathTestAbort(String::Format("Unable to open parent process %u",
                                   parent_process_id));
   }
   // TODO(vladl@google.com): Replace the following check with a
   // compile-time assertion when available.
   GTEST_CHECK_(sizeof(HANDLE) <= sizeof(size_t));
   const HANDLE write_handle =
       reinterpret_cast<HANDLE>(write_handle_as_size_t);
   HANDLE dup_write_handle;
   // The newly initialized handle is accessible only in in the parent
   // process. To obtain one accessible within the child, we need to use
   // DuplicateHandle.
   if (!::DuplicateHandle(parent_process_handle.Get(), write_handle,
                          ::GetCurrentProcess(), &dup_write_handle,
 x0,    // Requested privileges ignored since
                                  // DUPLICATE_SAME_ACCESS is used.
                          FALSE,  // Request non-inheritable handler.
                          DUPLICATE_SAME_ACCESS)) {
     DeathTestAbort(String::Format(
         "Unable to duplicate the pipe handle %Iu from the parent process %u",
         write_handle_as_size_t, parent_process_id));
   }
   const HANDLE event_handle = reinterpret_cast<HANDLE>(event_handle_as_size_t);
   HANDLE dup_event_handle;
   if (!::DuplicateHandle(parent_process_handle.Get(), event_handle,
                          ::GetCurrentProcess(), &dup_event_handle,
 x0,
                          FALSE,
                          DUPLICATE_SAME_ACCESS)) {
     DeathTestAbort(String::Format(
         "Unable to duplicate the event handle %Iu from the parent process %u",
         event_handle_as_size_t, parent_process_id));
   }
   const int write_fd =
       ::_open_osfhandle(reinterpret_cast<intptr_t>(dup_write_handle), O_APPEND);
   if (write_fd == -1) {
     DeathTestAbort(String::Format(
         "Unable to convert pipe handle %Iu to a file descriptor",
         write_handle_as_size_t));
   }
   // Signals the parent that the write end of the pipe has been acquired
   // so the parent can release its own write end.
   ::SetEvent(dup_event_handle);
   return write_fd;
 }
 # endif  // GTEST_OS_WINDOWS
 // Returns a newly created InternalRunDeathTestFlag object with fields
 // initialized from the GTEST_FLAG(internal_run_death_test) flag if
 // the flag is specified; otherwise returns NULL.
 InternalRunDeathTestFlag* ParseInternalRunDeathTestFlag() {
   if (GTEST_FLAG(internal_run_death_test) == "") return NULL;
   // GTEST_HAS_DEATH_TEST implies that we have ::std::string, so we
   // can use it here.
   int line = -1;
   int index = -1;
   ::std::vector< ::std::string> fields;
   SplitString(GTEST_FLAG(internal_run_death_test).c_str(), '|', &fields);
   int write_fd = -1;
 # if GTEST_OS_WINDOWS
   unsigned int parent_process_id = 0;
   size_t write_handle_as_size_t = 0;
   size_t event_handle_as_size_t = 0;
   if (fields.size() != 6
       || !ParseNaturalNumber(fields[1], &line)
       || !ParseNaturalNumber(fields[2], &index)
       || !ParseNaturalNumber(fields[3], &parent_process_id)
       || !ParseNaturalNumber(fields[4], &write_handle_as_size_t)
       || !ParseNaturalNumber(fields[5], &event_handle_as_size_t)) {
     DeathTestAbort(String::Format(
         "Bad --gtest_internal_run_death_test flag: %s",
         GTEST_FLAG(internal_run_death_test).c_str()));
   }
   write_fd = GetStatusFileDescriptor(parent_process_id,
                                      write_handle_as_size_t,
                                      event_handle_as_size_t);
 # else
   if (fields.size() != 4
       || !ParseNaturalNumber(fields[1], &line)
       || !ParseNaturalNumber(fields[2], &index)
       || !ParseNaturalNumber(fields[3], &write_fd)) {
     DeathTestAbort(String::Format(
         "Bad --gtest_internal_run_death_test flag: %s",
         GTEST_FLAG(internal_run_death_test).c_str()));
   }
 # endif  // GTEST_OS_WINDOWS
   return new InternalRunDeathTestFlag(fields[0], line, index, write_fd);
 }
 }  // namespace internal
 #endif  // GTEST_HAS_DEATH_TEST
 }  // namespace testing

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media/webrtc/trunk/testing/gtest/src/gtest-death-test.cc@deefc01c0e14 (annotated)

media/webrtc/trunk/testing/gtest/src/gtest-death-test.cc