forked from pool/glibc
58 lines
2.1 KiB
Diff
58 lines
2.1 KiB
Diff
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2010-03-23 Jakub Jelinek <jakub@redhat.com>
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* elf/dl-lookup.c (do_lookup_x): If tab->entries is NULL,
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but tab->size != 0, just unlock and goto success, without
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allocating anything or entering anything into the hash table.
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(_dl_debug_bindings): Temporarily set tab->entries to NULL
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around do_lookup_x in undef_map->l_local_scope[0].
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--- libc/elf/dl-lookup.c.jj 2009-12-16 00:10:37.000000000 +0100
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+++ libc/elf/dl-lookup.c 2010-03-23 11:03:45.850560036 +0100
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@@ -1,5 +1,6 @@
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/* Look up a symbol in the loaded objects.
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- Copyright (C) 1995-2005, 2006, 2007, 2009 Free Software Foundation, Inc.
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+ Copyright (C) 1995-2005, 2006, 2007, 2009, 2010
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+ Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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@@ -414,6 +415,20 @@ do_lookup_x (const char *undef_name, uin
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assert (!RTLD_CHECK_FOREIGN_CALL);
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#endif
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+#ifdef SHARED
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+ /* If tab->entries is NULL, but tab->size is not, it means
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+ this is the second, conflict finding, lookup for
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+ LD_TRACE_PRELINKING in _dl_debug_bindings. Don't
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+ allocate anything and don't enter anything into the
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+ hash table. */
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+ if (__builtin_expect (tab->size, 0))
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+ {
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+ assert (GLRO(dl_debug_mask) & DL_DEBUG_PRELINK);
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+ __rtld_lock_unlock_recursive (tab->lock);
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+ goto success;
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+ }
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+#endif
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+
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#define INITIAL_NUNIQUE_SYM_TABLE 31
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size = INITIAL_NUNIQUE_SYM_TABLE;
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entries = calloc (sizeof (struct unique_sym), size);
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@@ -917,13 +932,17 @@ _dl_debug_bindings (const char *undef_na
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{
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const uint_fast32_t new_hash = dl_new_hash (undef_name);
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unsigned long int old_hash = 0xffffffff;
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+ struct unique_sym *saved_entries
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+ = GL(dl_ns)[LM_ID_BASE]._ns_unique_sym_table.entries;
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+ GL(dl_ns)[LM_ID_BASE]._ns_unique_sym_table.entries = NULL;
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do_lookup_x (undef_name, new_hash, &old_hash, *ref, &val,
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undef_map->l_local_scope[0], 0, version, 0, NULL,
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type_class, undef_map);
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if (val.s != value->s || val.m != value->m)
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conflict = 1;
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+ GL(dl_ns)[LM_ID_BASE]._ns_unique_sym_table.entries = saved_entries;
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}
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if (value->s)
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