Bug#25657 mysql-test-run.pl kill itself under ActiveState perl

- Read the pid from pidfile in order to be able to kill the real process
instead of the pseudo process. Most platforms will have the same real_pid
as pid
- Kill using the real pid


mysql-test/lib/mtr_process.pl:
  Kill using the "real_pid"
mysql-test/mysql-test-run.pl:
  Read the pid from pidfile in order to be able to kill the real process
  instead of the pseudo process. Most platforms will have the same real_pid
  as pid

mysql-test/lib/mtr_process.pl

@@ -562,7 +562,7 @@ sub mtr_check_stop_servers ($) {
   # Return if no processes are defined
   return if ! @$spec;
 
-  #mtr_report("mtr_check_stop_servers");
+  mtr_verbose("mtr_check_stop_servers");
 
   mtr_ping_with_timeout(\@$spec);
 
@@ -605,7 +605,10 @@ sub mtr_check_stop_servers ($) {
   {
     if ( $srv->{'pid'} )
     {
-      $mysqld_pids{$srv->{'pid'}}= 1;
+       # Add the process pid to list of pids to kill
+       # if the process has a "real_pid" use it
+       $mysqld_pids{$srv->{'real_pid'} ?
+		    $srv->{'real_pid'} : $srv->{'pid'}}= 1;
     }
     else
     {
@@ -638,13 +641,9 @@ sub mtr_check_stop_servers ($) {
   # that for true Win32 processes, kill(0,$pid) will not return 1.
   # ----------------------------------------------------------------------
 
-  start_reap_all();                     # Avoid zombies
-
   my @mysqld_pids= keys %mysqld_pids;
   mtr_kill_processes(\@mysqld_pids);
 
-  stop_reap_all();                      # Get into control again
-
   # ----------------------------------------------------------------------
   # Now, we check if all we can find using kill(0,$pid) are dead,
   # and just assume the rest are. We cleanup socket and PID files.
@@ -654,14 +653,15 @@ sub mtr_check_stop_servers ($) {
     my $errors= 0;
     foreach my $srv ( @$spec )
     {
-      if ( $srv->{'pid'} )
+      my $pid= $srv->{'real_pid'} ? $srv->{'real_pid'} : $srv->{'pid'};
+      if ( $pid )
       {
-        if ( kill(0,$srv->{'pid'}) )
+        if ( kill(0, $pid) )
         {
           # FIXME In Cygwin there seem to be some fast reuse
           # of PIDs, so dying may not be the right thing to do.
           $errors++;
-          mtr_warning("can't kill process $srv->{'pid'}");
+          mtr_warning("can't kill process $pid");
         }
         else
         {
@@ -682,6 +682,8 @@ sub mtr_check_stop_servers ($) {
               mtr_warning("couldn't delete $file");
             }
           }
+	  # Reap the child
+	  waitpid($srv->{'pid'},&WNOHANG);
 	  $srv->{'pid'}= 0;
         }
       }
@@ -1063,7 +1065,10 @@ sub sleep_until_file_created ($$$) {
   {
     if ( -r $pidfile )
     {
-      return $pid;
+      # Read real pid from pidfile
+      my $real_pid= mtr_fromfile($pidfile);
+      mtr_verbose("pid: $pid, real_pid: $real_pid");
+      return $real_pid;
     }
 
     # Check if it died after the fork() was successful

mysql-test/mysql-test-run.pl

@@ -2549,10 +2549,16 @@ sub ndbcluster_wait_started($$){
 sub mysqld_wait_started($){
   my $mysqld= shift;
 
-  my $res= sleep_until_file_created($mysqld->{'path_pid'},
-				    $mysqld->{'start_timeout'},
-				    $mysqld->{'pid'});
-  return $res == 0;
+  my $pid_from_pidfile=
+    sleep_until_file_created($mysqld->{'path_pid'},
+                             $mysqld->{'start_timeout'},
+                             $mysqld->{'pid'});
+
+  # On platforms with pseudo threads we need to save
+  # the real pid of mysqld read from pidfile
+  $mysqld->{'real_pid'}= $pid_from_pidfile;
+
+  return $pid_from_pidfile == 0;
 }
 
 
@@ -4047,6 +4053,7 @@ sub stop_all_servers () {
 
       push(@kill_pids,{
 		       pid      => $mysqld->{'pid'},
+		       real_pid => $mysqld->{'real_pid'},
 		       pidfile  => $mysqld->{'path_pid'},
 		       sockfile => $mysqld->{'path_sock'},
 		       port     => $mysqld->{'port'},
@@ -4253,6 +4260,7 @@ sub run_testcase_stop_servers($$$) {
 
 	push(@kill_pids,{
 			 pid      => $mysqld->{'pid'},
+                         real_pid => $mysqld->{'real_pid'},
 			 pidfile  => $mysqld->{'path_pid'},
 			 sockfile => $mysqld->{'path_sock'},
 			 port     => $mysqld->{'port'},
@@ -4303,6 +4311,7 @@ sub run_testcase_stop_servers($$$) {
 
 	push(@kill_pids,{
 			 pid      => $mysqld->{'pid'},
+                         real_pid => $mysqld->{'real_pid'},
 			 pidfile  => $mysqld->{'path_pid'},
 			 sockfile => $mysqld->{'path_sock'},
 			 port     => $mysqld->{'port'},