[RFC][PATCH v6 20/20] Restore separate libc loading for the TLS/namespace storage test

["Vivek Das Mohapatra" <vivek@collabora.com>]

tst-tls-ie-dlmopen checks to see that new namespaces consume
TLS memory as expected: This does not happen when new namespaces
share the same libc instance (since TLS is allocated only when
a new libc instance insitialises its threading infrastructure).

Adding RTLD_ISOLATE to the dlmopen flags in the test restores
the old behaviour which allows the test to check what it
actually needs to.
---
 elf/tst-tls-ie-dlmopen.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/elf/tst-tls-ie-dlmopen.c b/elf/tst-tls-ie-dlmopen.c
index c7b5c688e3..8ba24ce54d 100644
--- a/elf/tst-tls-ie-dlmopen.c
+++ b/elf/tst-tls-ie-dlmopen.c
@@ -53,7 +53,7 @@ static void *
 load_and_access (Lmid_t lmid, const char *mod, const char *func)
 {
   /* Load module with TLS.  */
-  void *p = xdlmopen (lmid, mod, RTLD_NOW);
+  void *p = xdlmopen (lmid, mod, RTLD_NOW|RTLD_ISOLATE);
   /* Access the TLS variable to ensure it is allocated.  */
   void (*f) (void) = (void (*) (void))xdlsym (p, func);
   f ();
@@ -95,7 +95,7 @@ do_test (void)
      than 1024 bytes are available (exact number depends on TLS optimizations
      and the libc TLS use).  */
   printf ("The next dlmopen should fail...\n");
-  void *p = dlmopen (LM_ID_BASE, "tst-tls-ie-mod4.so", RTLD_NOW);
+  void *p = dlmopen (LM_ID_BASE, "tst-tls-ie-mod4.so", RTLD_NOW|RTLD_ISOLATE);
   if (p != NULL)
     FAIL_EXIT1 ("error: expected dlmopen to fail because there is "
 		"not enough surplus static TLS.\n");
-- 
2.20.1