Reorganize Multiprocess and implement for Windows

util/test/multiprocess_exec_posix.cc

 // Copyright 2014 The Crashpad Authors. All rights reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
 // You may obtain a copy of the License at
 //
 //     http://www.apache.org/licenses/LICENSE-2.0
 //
 // Unless required by applicable law or agreed to in writing, software
 // distributed under the License is distributed on an "AS IS" BASIS,
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
 #include "util/test/multiprocess_exec.h"
 
 #include <fcntl.h>
 #include <stdio.h>
 #include <stdlib.h>
+#include <unistd.h>
 
 #include "base/posix/eintr_wrapper.h"
 #include "gtest/gtest.h"
 #include "util/misc/scoped_forbid_return.h"
 #include "util/posix/close_multiple.h"
 #include "util/test/errors.h"
 
 namespace crashpad {
 namespace test {
 
@@ skipping 35 matching lines @@
 }
 
 void MultiprocessExec::MultiprocessChild() {
   // Make sure that stdin, stdout, and stderr are FDs 0, 1, and 2, respectively.
   // All FDs above this will be closed.
   static_assert(STDIN_FILENO == 0, "stdin must be fd 0");
   static_assert(STDOUT_FILENO == 1, "stdout must be fd 1");
   static_assert(STDERR_FILENO == 2, "stderr must be fd 2");
 
   // Move the read pipe to stdin.
-  int read_fd = ReadPipeFD();
-  ASSERT_NE(read_fd, STDIN_FILENO);
-  ASSERT_NE(read_fd, STDOUT_FILENO);
+  FileHandle read_handle = ReadPipeHandle();
+  ASSERT_NE(read_handle, STDIN_FILENO);
+  ASSERT_NE(read_handle, STDOUT_FILENO);
   ASSERT_EQ(STDIN_FILENO, fileno(stdin));
 
   int rv = fpurge(stdin);
   ASSERT_EQ(0, rv) << ErrnoMessage("fpurge");
 
-  rv = HANDLE_EINTR(dup2(read_fd, STDIN_FILENO));
+  rv = HANDLE_EINTR(dup2(read_handle, STDIN_FILENO));
   ASSERT_EQ(STDIN_FILENO, rv) << ErrnoMessage("dup2");
 
   // Move the write pipe to stdout.
-  int write_fd = WritePipeFD();
-  ASSERT_NE(write_fd, STDIN_FILENO);
-  ASSERT_NE(write_fd, STDOUT_FILENO);
+  FileHandle write_handle = WritePipeHandle();
+  ASSERT_NE(write_handle, STDIN_FILENO);
+  ASSERT_NE(write_handle, STDOUT_FILENO);
   ASSERT_EQ(STDOUT_FILENO, fileno(stdout));
 
   // Make a copy of the original stdout file descriptor so that in case there’s
   // an execv() failure, the original stdout can be restored so that gtest
   // messages directed to stdout go to the right place. Mark it as
   // close-on-exec, so that the child won’t see it after a successful exec(),
   // but it will still be available in this process after an unsuccessful
   // exec().
   int dup_orig_stdout_fd = dup(STDOUT_FILENO);
   ASSERT_GE(dup_orig_stdout_fd, 0) << ErrnoMessage("dup");
 
   rv = fcntl(dup_orig_stdout_fd, F_SETFD, FD_CLOEXEC);
   ASSERT_NE(rv, -1) << ErrnoMessage("fcntl");
 
   rv = HANDLE_EINTR(fflush(stdout));
   ASSERT_EQ(0, rv) << ErrnoMessage("fflush");
 
-  rv = HANDLE_EINTR(dup2(write_fd, STDOUT_FILENO));
+  rv = HANDLE_EINTR(dup2(write_handle, STDOUT_FILENO));
   ASSERT_EQ(STDOUT_FILENO, rv) << ErrnoMessage("dup2");
 
   CloseMultipleNowOrOnExec(STDERR_FILENO + 1, dup_orig_stdout_fd);
 
   // Start the new program, replacing this one. execv() has a weird declaration
   // where its argv argument is declared as char* const*. In reality, the
   // implementation behaves as if the argument were const char* const*, and this
   // behavior is required by the standard. See
   // http://pubs.opengroup.org/onlinepubs/9699919799/functions/exec.html
   // (search for “constant”).
@@ skipping 13 matching lines @@
   IGNORE_EINTR(close(STDOUT_FILENO));
   HANDLE_EINTR(dup2(dup_orig_stdout_fd, STDOUT_FILENO));
   IGNORE_EINTR(close(dup_orig_stdout_fd));
 
   forbid_return.Disarm();
   FAIL() << ErrnoMessage("execv") << ": " << argv_[0];
 }
 
 }  // namespace test
 }  // namespace crashpad