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glibc/elf/tst-tls16.c
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#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" |