Hurd: Missing critical region locks.

ChangeLog

@@ -1,5 +1,12 @@
 2012-05-10  Samuel Thibault  <[email protected]>
 
+        * hurd/hurd/fd.h (_hurd_fd_get): Call HURD_CRITICAL_BEGIN/
+        HURD_CRITICAL_END around holding _hurd_dtable_lock.
+        * sysdeps/mach/hurd/dirfd (dirfd): Likewise.
+        * sysdeps/mach/hurd/opendir.c (_hurd_fd_opendir): Call
+        HURD_CRITICAL_BEGIN/HURD_CRITICAL_END around holding
+        d->port.lock.
+
         * hurd/catch-signal.c (hurd_catch_signal): Use sigsetjmp/siglongjmp
         instead of setjmp/longjmp to restore the signal mask.  Call sigsetjmp
         when handler == SIG_ERR, not when handler != SIG_ERR.

hurd/hurd/fd.h

@@ -63,6 +63,7 @@ _hurd_fd_get (int fd)
 {
   struct hurd_fd *descriptor;
 
+  HURD_CRITICAL_BEGIN;
   __mutex_lock (&_hurd_dtable_lock);
   if (fd < 0 || fd >= _hurd_dtablesize)
     descriptor = NULL;
@@ -85,6 +86,7 @@ _hurd_fd_get (int fd)
 	}
     }
   __mutex_unlock (&_hurd_dtable_lock);
+  HURD_CRITICAL_END;
 
   return descriptor;
 }

sysdeps/mach/hurd/dirfd.c

@@ -1,5 +1,5 @@
 /* dirfd -- Return the file descriptor used by a DIR stream.  Hurd version.
-   Copyright (C) 1995, 1996 Free Software Foundation, Inc.
+   Copyright (C) 1995-2012 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
@@ -25,6 +25,8 @@ int
 dirfd (DIR *dirp)
 {
   int fd;
+
+  HURD_CRITICAL_BEGIN;
   __mutex_lock (&_hurd_dtable_lock);
   for (fd = 0; fd < _hurd_dtablesize; ++fd)
     if (_hurd_dtable[fd] == dirp->__fd)
@@ -35,6 +37,7 @@ dirfd (DIR *dirp)
       fd = -1;
     }
   __mutex_unlock (&_hurd_dtable_lock);
+  HURD_CRITICAL_END;
 
   return fd;
 }

sysdeps/mach/hurd/opendir.c

@@ -1,5 +1,4 @@
-/* Copyright (C) 1993,1994,1995,1996,1997,1998,2001,2003,2005,2006
-	Free Software Foundation, Inc.
+/* Copyright (C) 1993-2012 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
@@ -50,9 +49,11 @@ _hurd_fd_opendir (struct hurd_fd *d)
     return NULL;
 
   /* Set the descriptor to close on exec. */
+  HURD_CRITICAL_BEGIN;
   __spin_lock (&d->port.lock);
   d->flags |= FD_CLOEXEC;
   __spin_unlock (&d->port.lock);
+  HURD_CRITICAL_END;
 
   dirp->__fd = d;
   dirp->__data = dirp->__ptr = NULL;