Revert "Patch 3/4 of the effort to make TLS access async-signal-safe."

This reverts commit 35e8f7ab94c910659de9d507aa0f3e1f8973d914.

diff --git a/ChangeLog b/ChangeLog
index cb46152..80cb619 100644 (file)
--- a/ChangeLog
+++ b/ChangeLog
@@ -1046,13 +1046,6 @@
 
 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.
-
-2013-12-18  Andrew Hunter  <ahh@google.com>
-
        * sysdeps/generic/ldsodefs.h (_dl_mask_all_signals): New prototype.
        (_dl_unmask_signals): Likewise.
        * sysdeps/mach/hurd/dl-sysdep.h (_dl_mask_all_signals): New stub.

diff --git a/elf/Versions b/elf/Versions
index 01b7a59..2383992 100644 (file)
--- a/elf/Versions
+++ b/elf/Versions
@@ -53,7 +53,6 @@ ld {
     _dl_allocate_tls; _dl_allocate_tls_init;
     _dl_argv; _dl_find_dso_for_object; _dl_get_tls_static_info;
     _dl_deallocate_tls; _dl_make_stack_executable; _dl_out_of_memory;
-    _dl_clear_dtv;
     _dl_rtld_di_serinfo; _dl_starting_up; _dl_tls_setup;
     _rtld_global; _rtld_global_ro;
 

diff --git a/elf/dl-tls.c b/elf/dl-tls.c
index 28e4fbe..dbaea0a 100644 (file)
--- a/elf/dl-tls.c
+++ b/elf/dl-tls.c
@@ -463,18 +463,6 @@ _dl_allocate_tls (void *mem)
 }
 rtld_hidden_def (_dl_allocate_tls)
 
-void
-internal_function
-_dl_clear_dtv (dtv_t *dtv)
-{
-  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));
-}
-
-rtld_hidden_def (_dl_clear_dtv)
 
 #ifndef SHARED
 extern dtv_t _dl_static_dtv[];

diff --git a/nptl/allocatestack.c b/nptl/allocatestack.c
index 7f6094e..13eca47 100644 (file)
--- a/nptl/allocatestack.c
+++ b/nptl/allocatestack.c
@@ -242,7 +242,11 @@ get_cached_stack (size_t *sizep, void **memp)
 
   /* Clear the DTV.  */
   dtv_t *dtv = GET_DTV (TLS_TPADJ (result));
-  _dl_clear_dtv (dtv);
+  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));
 
   /* Re-initialize the TLS.  */
   _dl_allocate_tls_init (TLS_TPADJ (result));

diff --git a/sysdeps/generic/ldsodefs.h b/sysdeps/generic/ldsodefs.h
index 5e25226..ff3f20f 100644 (file)
--- a/sysdeps/generic/ldsodefs.h
+++ b/sysdeps/generic/ldsodefs.h
@@ -989,11 +989,6 @@ extern void *_dl_allocate_tls_storage (void)
 extern void *_dl_allocate_tls_init (void *) internal_function;
 rtld_hidden_proto (_dl_allocate_tls_init)
 
-/* Remove all allocated dynamic TLS regions from a DTV
-   for reuse by new thread.  */
-extern void _dl_clear_dtv (dtv_t *dtv) internal_function;
-rtld_hidden_proto (_dl_clear_dtv)
-
 /* Deallocate memory allocated with _dl_allocate_tls.  */
 extern void _dl_deallocate_tls (void *tcb, bool dealloc_tcb) internal_function;
 rtld_hidden_proto (_dl_deallocate_tls)