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authorUlrich Drepper <drepper@redhat.com>2000-04-03 03:51:04 +0000
committerUlrich Drepper <drepper@redhat.com>2000-04-03 03:51:04 +0000
commitcf197e41e7e468697e5a8d7b3f4c4930dd557990 (patch)
treee1872dc669824d35aa47cc9964aa6fe9ea159f7b /elf/dl-support.c
parentec79422d9e17bd5388a3fc34fcd2ef434e0cac26 (diff)
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Update.
2000-04-02 Ulrich Drepper <drepper@redhat.com> * elf/dl-fini.c (_dl_fini): Increment j counter after swapping in element at this position. * elf/Versions [ld.so] (GLIBC_2.2): Export _dl_load_lock. * elf/link.h (struct link_map): Add l_reldepsmax, l_reldepsact, and l_reldeps elements. * elf/dl-lookup.c (add_dependency): New function. (_dl_lookup_symbol): Use it whenever symbol was found in a global, dynamically loaded object. (_dl_lookup_symbol_skip): Likewise. (_dl_lookup_versioned_symbol): Likewise. (_dl_lookup_versioned_symbol_skip): Likewise. * elf/dl-open.c: Don't define _dl_load_lock here... * elf/rtld.c: ...but here... * elf/dl-support.c: ...and here. * elf/dl-close.c (_dl_close): Close also dependent objects introduce through relocation. * elf/dl-fini.c (_dl_fini): Also take dependencies introduced through relocations. * dlfcn/Makefile (glrefmain.out): Test is not expected to fail anymore. * dlfcn/glrefmain.c: Add one more debug message. * Makeconfig (preprocess-versions): Don't add $(CPPFLAGS) to compiler command line. * Makerules (sysd-versions): Use ( ) instead of { }. * elf/dl-load.c: Use __builtin_expect to signal that compiler should optimize for the non-debugging case. * elf/dl-lookup.c: Likewise. * sysdeps/generic/libc-start.c: Likewise.
Diffstat (limited to 'elf/dl-support.c')
-rw-r--r--elf/dl-support.c10
1 files changed, 10 insertions, 0 deletions
diff --git a/elf/dl-support.c b/elf/dl-support.c
index 8201ced490..68973cc5c1 100644
--- a/elf/dl-support.c
+++ b/elf/dl-support.c
@@ -25,6 +25,7 @@
#include <unistd.h>
#include <ldsodefs.h>
#include <dl-machine.h>
+#include <bits/libc-lock.h>
extern char *__progname;
char **_dl_argv = &__progname; /* This is checked for some error messages. */
@@ -81,6 +82,15 @@ struct r_scope_elem *_dl_main_searchlist = &_dl_initial_searchlist;
/* Nonzero during startup. */
int _dl_starting_up = 1;
+/* During the program run we must not modify the global data of
+ loaded shared object simultanously in two threads. Therefore we
+ protect `_dl_open' and `_dl_close' in dl-close.c.
+
+ This must be a recursive lock since the initializer function of
+ the loaded object might as well require a call to this function.
+ At this time it is not anymore a problem to modify the tables. */
+__libc_lock_define_initialized_recursive (, _dl_load_lock)
+
static void non_dynamic_init (void) __attribute__ ((unused));