Fix td_ta_map_lwp2thr logging and early sanity check.

nptl_db/ChangeLog

@@ -1,3 +1,10 @@
+2009-08-23  Roland McGrath  <roland@redhat.com>
+
+	* td_ta_map_lwp2thr.c (__td_ta_lookup_th_unique): Move ta_ok check
+	and LOG call back to ...
+	(td_ta_map_lwp2thr): ... here.
+	Reported by Maciej W. Rozycki <macro@codesourcery.com>.
+
 2009-05-25  Aurelien Jarno  <aurelien@aurel32.net>
 
 	[BZ #10200]

nptl_db/td_ta_map_lwp2thr.c

@@ -1,5 +1,5 @@
 /* Which thread is running on an LWP?
-   Copyright (C) 2003, 2004, 2007 Free Software Foundation, Inc.
+   Copyright (C) 2003,2004,2007,2009 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
@@ -33,12 +33,6 @@ __td_ta_lookup_th_unique (const td_thragent_t *ta_arg,
   prgregset_t regs;
   psaddr_t addr;
 
-  LOG ("td_ta_map_lwp2thr");
-
-  /* Test whether the TA parameter is ok.  */
-  if (! ta_ok (ta))
-    return TD_BADTA;
-
   if (ta->ta_howto == ta_howto_unknown)
     {
       /* We need to read in from the inferior the instructions what to do.  */
@@ -181,6 +175,12 @@ td_ta_map_lwp2thr (const td_thragent_t *ta_arg,
 {
   td_thragent_t *const ta = (td_thragent_t *) ta_arg;
 
+  LOG ("td_ta_map_lwp2thr");
+
+  /* Test whether the TA parameter is ok.  */
+  if (! ta_ok (ta))
+    return TD_BADTA;
+
   /* We cannot rely on thread registers and such information at all
      before __pthread_initialize_minimal has gotten far enough.  They
      sometimes contain garbage that would confuse us, left by the kernel