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* elf/dl-tls.c (__tls_get_addr): After calling _dl_update_slotinfo

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refetch dtv, as it might have changed.
	* elf/Makefile: Add rules to build and run tst-tls18.
	* elf/tst-tls18.c: New test.
	* elf/tst-tlsmod18a.c: New file.
This commit is contained in:
Ulrich Drepper 2008-10-31 20:50:16 +00:00
parent e148a6443c
commit 41e25904a5
5 changed files with 79 additions and 2 deletions
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8
ChangeLog
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@ -1,3 +1,11 @@
2008-10-31 Jakub Jelinek <jakub@redhat.com>
* elf/dl-tls.c (__tls_get_addr): After calling _dl_update_slotinfo
refetch dtv, as it might have changed.
* elf/Makefile: Add rules to build and run tst-tls18.
* elf/tst-tls18.c: New test.
* elf/tst-tlsmod18a.c: New file.
2008-09-09 Aurelien Jarno <aurelien@aurel32.net>
[BZ #6875]

10
elf/Makefile
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@ -166,7 +166,7 @@ tests += loadtest restest1 preloadtest loadfail multiload origtest resolvfail \
restest2 next dblload dblunload reldep5 reldep6 reldep7 reldep8 \
circleload1 tst-tls3 tst-tls4 tst-tls5 tst-tls6 tst-tls7 tst-tls8 \
tst-tls10 tst-tls11 tst-tls12 tst-tls13 tst-tls14 tst-tls15 \
tst-tls16 tst-tls17 tst-tls-dlinfo \
tst-tls16 tst-tls17 tst-tls18 tst-tls-dlinfo \
tst-align tst-align2 $(tests-execstack-$(have-z-execstack)) \
tst-dlmodcount tst-dlopenrpath tst-deep1 \
tst-dlmopen1 tst-dlmopen2 tst-dlmopen3 \
@ -182,6 +182,7 @@ tests: $(objpfx)tst-pie1.out
endif
tests: $(objpfx)tst-leaks1-mem
tlsmod17a-suffixes = 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
tlsmod18a-suffixes = 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
modules-names = testobj1 testobj2 testobj3 testobj4 testobj5 testobj6 \
testobj1_1 failobj constload2 constload3 unloadmod \
dep1 dep2 dep3 dep4 vismod1 vismod2 vismod3 \
@ -203,6 +204,7 @@ modules-names = testobj1 testobj2 testobj3 testobj4 testobj5 testobj6 \
tst-tlsmod15a tst-tlsmod15b tst-tlsmod16a tst-tlsmod16b \
$(patsubst %,tst-tlsmod17a%,$(tlsmod17a-suffixes)) \
tst-tlsmod17b \
$(patsubst %,tst-tlsmod18a%,$(tlsmod18a-suffixes)) \
circlemod1 circlemod1a circlemod2 circlemod2a \
circlemod3 circlemod3a \
reldep8mod1 reldep8mod2 reldep8mod3 \
@ -724,6 +726,12 @@ $(patsubst %,$(objpfx)tst-tlsmod17a%.os,$(tlsmod17a-suffixes)): $(objpfx)tst-tls
$(patsubst %,$(objpfx)tst-tlsmod17a%.so,$(tlsmod17a-suffixes)): $(objpfx)tst-tlsmod17a%.so: $(objpfx)ld.so
$(objpfx)tst-tlsmod17b.so: $(patsubst %,$(objpfx)tst-tlsmod17a%.so,$(tlsmod17a-suffixes))
$(objpfx)tst-tls18: $(libdl)
$(objpfx)tst-tls18.out: $(patsubst %,$(objpfx)tst-tlsmod18a%.so,$(tlsmod18a-suffixes))
$(patsubst %,$(objpfx)tst-tlsmod18a%.os,$(tlsmod18a-suffixes)): $(objpfx)tst-tlsmod18a%.os : tst-tlsmod18a.c
$(CC) $(CFLAGS) $(CPPFLAGS) -c -o $@ -DN=$* -DNOT_IN_libc=1 $<
$(patsubst %,$(objpfx)tst-tlsmod18a%.so,$(tlsmod18a-suffixes)): $(objpfx)tst-tlsmod18a%.so: $(objpfx)ld.so
CFLAGS-tst-align.c = $(stack-align-test-flags)
CFLAGS-tst-align2.c = $(stack-align-test-flags)
CFLAGS-tst-alignmod.c = $(stack-align-test-flags)

5
elf/dl-tls.c
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@ -756,7 +756,10 @@ __tls_get_addr (GET_ADDR_ARGS)
void *p;
if (__builtin_expect (dtv[0].counter != GL(dl_tls_generation), 0))
the_map = _dl_update_slotinfo (GET_ADDR_MODULE);
{
the_map = _dl_update_slotinfo (GET_ADDR_MODULE);
dtv = THREAD_DTV ();
}
p = dtv[GET_ADDR_MODULE].pointer.val;

37
elf/tst-tls18.c Normal file
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@ -0,0 +1,37 @@
#include <dlfcn.h>
#include <stdio.h>
static int
do_test (void)
{
char modname[sizeof "tst-tlsmod18aXX.so"];
void *h[20];
for (int i = 0; i < 20; i++)
{
snprintf (modname, sizeof modname, "tst-tlsmod18a%d.so", i);
h[i] = dlopen (modname, RTLD_LAZY);
if (h[i] == NULL)
{
printf ("unexpectedly failed to open %s", modname);
exit (1);
}
}
for (int i = 0; i < 20; i++)
{
int (*fp) (void) = (int (*) (void)) dlsym (h[i], "test");
if (fp == NULL)
{
printf ("cannot find test in tst-tlsmod18a%d.so", i);
exit (1);
}
if (fp ())
exit (1);
}
return 0;
}
#define TEST_FUNCTION do_test ()
#include "../test-skeleton.c"

21
elf/tst-tlsmod18a.c Normal file
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@ -0,0 +1,21 @@
#include <stdio.h>
#ifndef N
# define N 0
#endif
static __thread int var = 4;
int
test (void)
{
int *p = &var;
/* GCC assumes &var is never NULL, add optimization barrier. */
asm volatile ("" : "+r" (p));
if (p == NULL || *p != 4)
{
printf ("fail %d %p\n", N, p);
return 1;
}
return 0;
}