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authorPaul Pluzhnikov <ppluzhnikov@google.com>2013-12-18 16:24:19 -0800
committerPaul Pluzhnikov <ppluzhnikov@google.com>2013-12-18 16:24:19 -0800
commit35e8f7ab94c910659de9d507aa0f3e1f8973d914 (patch)
treefca3c69ec2085dbeee15673472350c9067ddf4f7 /nptl/allocatestack.c
parent69a17d9d245dc3551792e95e1823cc2d877592f3 (diff)
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Patch 3/4 of the effort to make TLS access async-signal-safe.
Factor out _dl_clear_dtv.

2013-12-18  Andrew Hunter  <ahh@google.com>

	* elf/Versions (ld): Add _dl_clear_dtv.
	* sysdeps/generic/ldsodefs.h (_dl_clear_dtv): New prototype.
	* elf/dl-tls.c (_dl_clear_dtv): New function.
	* nptl/allocatestack.c (get_cached_stack): Call _dl_clear_dtv.
Diffstat (limited to 'nptl/allocatestack.c')
-rw-r--r--nptl/allocatestack.c6
1 files changed, 1 insertions, 5 deletions
diff --git a/nptl/allocatestack.c b/nptl/allocatestack.c
index 1e0fe1f18d..96e3845088 100644
--- a/nptl/allocatestack.c
+++ b/nptl/allocatestack.c
@@ -242,11 +242,7 @@ get_cached_stack (size_t *sizep, void **memp)
 
   /* Clear the DTV.  */
   dtv_t *dtv = GET_DTV (TLS_TPADJ (result));
-  for (size_t cnt = 0; cnt < dtv[-1].counter; ++cnt)
-    if (! dtv[1 + cnt].pointer.is_static
-	&& dtv[1 + cnt].pointer.val != TLS_DTV_UNALLOCATED)
-      free (dtv[1 + cnt].pointer.val);
-  memset (dtv, '\0', (dtv[-1].counter + 1) * sizeof (dtv_t));
+  _dl_clear_dtv (dtv);
 
   /* Re-initialize the TLS.  */
   _dl_allocate_tls_init (TLS_TPADJ (result));