Set close-on-exec flag on pipe() and epoll() file descriptors

runtime/bin/eventhandler_linux.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "bin/eventhandler.h"
 
 #include <errno.h>
 #include <pthread.h>
 #include <stdio.h>
 #include <string.h>
@@ skipping 87 matching lines @@
 
 
 EventHandlerImplementation::EventHandlerImplementation()
     : socket_map_(&HashMap::SamePointerValue, 16) {
   intptr_t result;
   result = TEMP_FAILURE_RETRY(pipe(interrupt_fds_));
   if (result != 0) {
     FATAL("Pipe creation failed");
   }
   FDUtils::SetNonBlocking(interrupt_fds_[0]);
+  FDUtils::SetCloseOnExec(interrupt_fds_[0]);
+  FDUtils::SetCloseOnExec(interrupt_fds_[1]);
   timeout_ = kInfinityTimeout;
   timeout_port_ = 0;
   shutdown_ = false;
   // The initial size passed to epoll_create is ignore on newer (>=
   // 2.6.8) Linux versions
   static const int kEpollInitialSize = 64;
   epoll_fd_ = TEMP_FAILURE_RETRY(epoll_create(kEpollInitialSize));
   if (epoll_fd_ == -1) {
     FATAL("Failed creating epoll file descriptor");
   }
+  FDUtils::SetCloseOnExec(epoll_fd_);
   // Register the interrupt_fd with the epoll instance.
   struct epoll_event event;
   event.events = EPOLLIN;
   event.data.ptr = NULL;
   int status = TEMP_FAILURE_RETRY(epoll_ctl(epoll_fd_,
                                             EPOLL_CTL_ADD,
                                             interrupt_fds_[0],
                                             &event));
   if (status == -1) {
     FATAL("Failed adding interrupt fd to epoll instance");
@@ skipping 293 matching lines @@
 void* EventHandlerImplementation::GetHashmapKeyFromFd(intptr_t fd) {
   // The hashmap does not support keys with value 0.
   return reinterpret_cast<void*>(fd + 1);
 }
 
 
 uint32_t EventHandlerImplementation::GetHashmapHashFromFd(intptr_t fd) {
   // The hashmap does not support keys with value 0.
   return dart::Utils::WordHash(fd + 1);
 }