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.

1 files changed, 10 insertions, 0 deletions

diff --git a/elf/rtld.c b/elf/rtld.c
index 562e44a..24968f8 100644
--- a/elf/rtld.c
+++ b/elf/rtld.c
@@ -27,6 +27,7 @@
 #include <entry.h>
 #include <fpu_control.h>
 #include <hp-timing.h>
+#include <bits/libc-lock.h>
 #include "dynamic-link.h"
 #include "dl-librecon.h"
 
@@ -105,6 +106,15 @@ struct r_scope_elem _dl_initial_searchlist;
 /* Array which is used when looking up in the global scope.  */
 struct r_scope_elem *_dl_global_scope[2];
 
+/* 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)
+
 /* Set nonzero during loading and initialization of executable and
    libraries, cleared before the executable's entry point runs.  This
    must not be initialized to nonzero, because the unused dynamic