From 4c533566c2bb94162bcc1f66c5cf9db609e20803 Mon Sep 17 00:00:00 2001 From: Ulrich Drepper Date: Thu, 17 Jan 2008 20:20:00 +0000 Subject: * 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. --- elf/tst-tls16.c | 52 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 52 insertions(+) create mode 100644 elf/tst-tls16.c (limited to 'elf/tst-tls16.c') 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 +#include + +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" -- cgit 1.4.1