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authorUlrich Drepper <drepper@redhat.com>2008-01-17 20:20:00 +0000
committerUlrich Drepper <drepper@redhat.com>2008-01-17 20:20:00 +0000
commit4c533566c2bb94162bcc1f66c5cf9db609e20803 (patch)
treeeb3d31e6a55056dc285e43b4700dccded4b88771 /elf/tst-tls16.c
parenta0f6c236e068b4fa2d1116cdf7d31b2c2722ab6c (diff)
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* include/link.h (FORCED_DYNAMIC_TLS_OFFSET): Define.
	* elf/dl-close.c (_dl_close): Check for it.
	* elf/dl-reloc.c (CHECK_STATIC_TLS): Likewise.
	(_dl_allocate_static_tls): Likewise.
	* elf/dl-tls.c (_dl_allocate_tls_init): Likewise.
	(__tls_get_addr): Protect from race conditions in setting l_tls_offset
	to it.
	* elf/tst-tls16.c: New file.
	* elf/tst-tlsmod16a.c: New file.
	* elf/tst-tlsmod16b.c: New file.
	* elf/Makefile: Add rules to build and run tst-tls16.
Diffstat (limited to 'elf/tst-tls16.c')
-rw-r--r--elf/tst-tls16.c52
1 files changed, 52 insertions, 0 deletions
diff --git a/elf/tst-tls16.c b/elf/tst-tls16.c
new file mode 100644
index 0000000000..b3519858a0
--- /dev/null
+++ b/elf/tst-tls16.c
@@ -0,0 +1,52 @@
+#include <dlfcn.h>
+#include <stdio.h>
+
+static int
+do_test (void)
+{
+  void *h = dlopen ("tst-tlsmod16a.so", RTLD_LAZY | RTLD_GLOBAL);
+  if (h == NULL)
+    {
+      puts ("unexpectedly failed to open tst-tlsmod16a.so");
+      exit (1);
+    }
+
+  void *p = dlsym (h, "tlsvar");
+
+  /* This dlopen should indeed fail, because tlsvar was assigned to
+     dynamic TLS, and the new module requests it to be in static TLS.
+     However, there's a possibility that dlopen succeeds if the
+     variable is, for whatever reason, assigned to static TLS, or if
+     the module fails to require static TLS, or even if TLS is not
+     supported.  */
+  h = dlopen ("tst-tlsmod16b.so", RTLD_NOW | RTLD_GLOBAL);
+  if (h == NULL)
+    {
+      return 0;
+    }
+
+  puts ("unexpectedly succeeded to open tst-tlsmod16b.so");
+
+
+  void *(*fp) (void) = (void *(*) (void)) dlsym (h, "in_dso");
+  if (fp == NULL)
+    {
+      puts ("cannot find in_dso");
+      exit (1);
+    }
+
+  /* If the dlopen passes, at least make sure the address returned by
+     dlsym is the same as that returned by the initial-exec access.
+     If the variable was assigned to dynamic TLS during dlsym, this
+     portion will fail.  */
+  if (fp () != p)
+    {
+      puts ("returned values do not match");
+      exit (1);
+    }
+
+  return 0;
+}
+
+#define TEST_FUNCTION do_test ()
+#include "../test-skeleton.c"