diff options
Diffstat (limited to 'elf')
| -rw-r--r-- | elf/Makefile | 9 | ||||
| -rw-r--r-- | elf/dl-open.c | 64 | ||||
| -rw-r--r-- | elf/tst-tls19.c | 27 | ||||
| -rw-r--r-- | elf/tst-tls19mod1.c | 15 | ||||
| -rw-r--r-- | elf/tst-tls19mod2.c | 13 | ||||
| -rw-r--r-- | elf/tst-tls19mod3.c | 16 |
6 files changed, 118 insertions, 26 deletions
diff --git a/elf/Makefile b/elf/Makefile index 8d9657d..6efb86c 100644 --- a/elf/Makefile +++ b/elf/Makefile @@ -76,6 +76,7 @@ distribute := rtld-Rules \ tst-tlsmod12.c tst-tls10.h tst-alignmod.c tst-alignmod2.c \ circlemod1.c circlemod1a.c circlemod2.c circlemod2a.c \ circlemod3.c circlemod3a.c nodlopenmod2.c \ + tst-tls19mod1.c tst-tls19mod2.c tst-tls19mod3.c \ tls-macros.h \ reldep8mod1.c reldep8mod2.c reldep8mod3.c \ nodel2mod1.c nodel2mod2.c nodel2mod3.c \ @@ -194,7 +195,7 @@ 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-tls18 tst-tls-dlinfo \ + tst-tls16 tst-tls17 tst-tls18 tst-tls19 tst-tls-dlinfo \ tst-align tst-align2 $(tests-execstack-$(have-z-execstack)) \ tst-dlmodcount tst-dlopenrpath tst-deep1 \ tst-dlmopen1 tst-dlmopen2 tst-dlmopen3 \ @@ -240,6 +241,7 @@ modules-names = testobj1 testobj2 testobj3 testobj4 testobj5 testobj6 \ tst-tlsmod13 tst-tlsmod13a tst-tlsmod14a tst-tlsmod14b \ tst-tlsmod15a tst-tlsmod15b tst-tlsmod16a tst-tlsmod16b \ $(tlsmod17a-modules) tst-tlsmod17b $(tlsmod18a-modules) \ + tst-tls19mod1 tst-tls19mod2 tst-tls19mod3 \ circlemod1 circlemod1a circlemod2 circlemod2a \ circlemod3 circlemod3a \ reldep8mod1 reldep8mod2 reldep8mod3 \ @@ -525,6 +527,8 @@ $(objpfx)tst-tlsmod13a.so: $(objpfx)tst-tlsmod13.so # For tst-tls9-static, make sure the modules it dlopens have libc.so in DT_NEEDED $(objpfx)tst-tlsmod5.so: $(common-objpfx)libc.so $(objpfx)tst-tlsmod6.so: $(common-objpfx)libc.so +$(objpfx)tst-tls19mod1.so: $(objpfx)tst-tls19mod2.so $(objpfx)tst-tls19mod3.so +$(objpfx)tst-tls19mod3.so: $(objpfx)ld.so $(objpfx)reldep8mod3.so: $(objpfx)reldep8mod1.so $(objpfx)reldep8mod2.so $(objpfx)nodel2mod3.so: $(objpfx)nodel2mod1.so $(objpfx)nodel2mod2.so $(objpfx)reldep9mod2.so: $(objpfx)reldep9mod1.so @@ -822,6 +826,9 @@ $(patsubst %,$(objpfx)%.os,$(tlsmod18a-modules)): $(objpfx)tst-tlsmod18a%.os : t $(compile-command.c) -DN=$* $(patsubst %,$(objpfx)%.so,$(tlsmod18a-modules)): $(objpfx)tst-tlsmod18a%.so: $(objpfx)ld.so +$(objpfx)tst-tls19: $(libdl) +$(objpfx)tst-tls19.out: $(objpfx)tst-tls19mod1.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) diff --git a/elf/dl-open.c b/elf/dl-open.c index cf8e8cc..8d90b56 100644 --- a/elf/dl-open.c +++ b/elf/dl-open.c @@ -1,5 +1,5 @@ /* Load a shared object at runtime, relocate it, and run its initializer. - Copyright (C) 1996-2007, 2009, 2010 Free Software Foundation, Inc. + Copyright (C) 1996-2007, 2009, 2010, 2011 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or @@ -347,6 +347,7 @@ dl_open_worker (void *a) /* If the file is not loaded now as a dependency, add the search list of the newly loaded object to the scope. */ bool any_tls = false; + unsigned int first_static_tls = new->l_searchlist.r_nlist; for (unsigned int i = 0; i < new->l_searchlist.r_nlist; ++i) { struct link_map *imap = new->l_searchlist.r_list[i]; @@ -425,30 +426,9 @@ dl_open_worker (void *a) might have to increase its size. */ _dl_add_to_slotinfo (imap); - if (imap->l_need_tls_init) - { - /* For static TLS we have to allocate the memory here - and now. This includes allocating memory in the DTV. - But we cannot change any DTV other than our own. So, - if we cannot guarantee that there is room in the DTV - we don't even try it and fail the load. - - XXX We could track the minimum DTV slots allocated in - all threads. */ - if (! RTLD_SINGLE_THREAD_P && imap->l_tls_modid > DTV_SURPLUS) - _dl_signal_error (0, "dlopen", NULL, N_("\ -cannot load any more object with static TLS")); - - imap->l_need_tls_init = 0; -#ifdef SHARED - /* Update the slot information data for at least the - generation of the DSO we are allocating data for. */ - _dl_update_slotinfo (imap->l_tls_modid); -#endif - - GL(dl_init_static_tls) (imap); - assert (imap->l_need_tls_init == 0); - } + if (imap->l_need_tls_init + && first_static_tls == new->l_searchlist.r_nlist) + first_static_tls = i; /* We have to bump the generation counter. */ any_tls = true; @@ -460,6 +440,40 @@ cannot load any more object with static TLS")); _dl_fatal_printf (N_("\ TLS generation counter wrapped! Please report this.")); + /* We need a second pass for static tls data, because _dl_update_slotinfo + must not be run while calls to _dl_add_to_slotinfo are still pending. */ + for (unsigned int i = first_static_tls; i < new->l_searchlist.r_nlist; ++i) + { + struct link_map *imap = new->l_searchlist.r_list[i]; + + if (imap->l_need_tls_init + && ! imap->l_init_called + && imap->l_tls_blocksize > 0) + { + /* For static TLS we have to allocate the memory here and + now. This includes allocating memory in the DTV. But we + cannot change any DTV other than our own. So, if we + cannot guarantee that there is room in the DTV we don't + even try it and fail the load. + + XXX We could track the minimum DTV slots allocated in + all threads. */ + if (! RTLD_SINGLE_THREAD_P && imap->l_tls_modid > DTV_SURPLUS) + _dl_signal_error (0, "dlopen", NULL, N_("\ +cannot load any more object with static TLS")); + + imap->l_need_tls_init = 0; +#ifdef SHARED + /* Update the slot information data for at least the + generation of the DSO we are allocating data for. */ + _dl_update_slotinfo (imap->l_tls_modid); +#endif + + GL(dl_init_static_tls) (imap); + assert (imap->l_need_tls_init == 0); + } + } + /* Run the initializer functions of new objects. */ _dl_init (new, args->argc, args->argv, args->env); diff --git a/elf/tst-tls19.c b/elf/tst-tls19.c new file mode 100644 index 0000000..acbc1d6 --- /dev/null +++ b/elf/tst-tls19.c @@ -0,0 +1,27 @@ +// BZ 12453 +#include <stdio.h> +#include <dlfcn.h> + + +static int +do_test (void) +{ + void* dl = dlopen ("tst-tls19mod1.so", RTLD_LAZY | RTLD_GLOBAL); + if (dl == NULL) + { + printf ("Error loading tst-tls19mod1.so: %s\n", dlerror ()); + return 1; + } + + int (*fn) (void) = dlsym (dl, "foo"); + if (fn == NULL) + { + printf("Error obtaining symbol foo\n"); + return 1; + } + + return fn (); +} + +#define TEST_FUNCTION do_test () +#include "../test-skeleton.c" diff --git a/elf/tst-tls19mod1.c b/elf/tst-tls19mod1.c new file mode 100644 index 0000000..2790097 --- /dev/null +++ b/elf/tst-tls19mod1.c @@ -0,0 +1,15 @@ +#include <stdio.h> + +extern int bar (void); +extern int baz (void); + +int +foo (void) +{ + int v1 = bar (); + int v2 = baz (); + + printf ("bar=%d, baz=%d\n", v1, v2); + + return v1 != 666 || v2 != 42; +} diff --git a/elf/tst-tls19mod2.c b/elf/tst-tls19mod2.c new file mode 100644 index 0000000..cae702f --- /dev/null +++ b/elf/tst-tls19mod2.c @@ -0,0 +1,13 @@ +static int __thread tbar __attribute__ ((tls_model ("initial-exec"))) = 666; + +void +setter (int a) +{ + tbar = a; +} + +int +bar (void) +{ + return tbar; +} diff --git a/elf/tst-tls19mod3.c b/elf/tst-tls19mod3.c new file mode 100644 index 0000000..e7b2801 --- /dev/null +++ b/elf/tst-tls19mod3.c @@ -0,0 +1,16 @@ +#include <stdio.h> + +static int __thread tbaz __attribute__ ((tls_model ("local-dynamic"))) = 42; + +void +setter2 (int a) +{ + tbaz = a; +} + +int +baz (void) +{ + printf ("&tbaz=%p\n", &tbaz); + return tbaz; +} |