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2001-08-22  Ulrich Drepper  <drepper@redhat.com>

	* elf/dl-addr.c (_dl_addr): Fix tests to determine dli_sname.
	* malloc/mtrace.c (tr_where): dli_sname always points to a
	non-empty string is != NULL.
	Reported by Tim Janik <timj@gtk.org>.
This commit is contained in:
Ulrich Drepper
2001-08-22 17:55:23 +00:00
parent 2e3e5db668
commit 46b05e5d74
3 changed files with 16 additions and 6 deletions
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13
elf/dl-addr.c
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@ -1,5 +1,5 @@
/* Locate the shared object symbol nearest a given address.
Copyright (C) 1996, 1997, 1998, 1999, 2000 Free Software Foundation, Inc.
Copyright (C) 1996-2000, 2001 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
@ -30,6 +30,7 @@ _dl_addr (const void *address, Dl_info *info)
struct link_map *l, *match;
const ElfW(Sym) *symtab, *matchsym;
const char *strtab;
ElfW(Word) strtabsize;
/* Find the highest-addressed object that ADDRESS is not below. */
match = NULL;
@ -70,15 +71,17 @@ _dl_addr (const void *address, Dl_info *info)
symtab = (const void *) D_PTR (match, l_info[DT_SYMTAB]);
strtab = (const void *) D_PTR (match, l_info[DT_STRTAB]);
strtabsize = match->l_info[DT_STRSZ]->d_un.d_val;
/* We assume that the string table follows the symbol table, because
there is no way in ELF to know the size of the dynamic symbol table!! */
for (matchsym = NULL; (void *) symtab < (void *) strtab; ++symtab)
if (addr >= match->l_addr + symtab->st_value
&& (!matchsym
|| (matchsym->st_value < symtab->st_value
&& (ELFW(ST_BIND) (symtab->st_info) == STB_GLOBAL
|| ELFW(ST_BIND) (symtab->st_info) == STB_WEAK))))
&& addr < match->l_addr + symtab->st_value + symtab->st_size
&& symtab->st_name < strtabsize
&& (matchsym == NULL || matchsym->st_value < symtab->st_value)
&& (ELFW(ST_BIND) (symtab->st_info) == STB_GLOBAL
|| ELFW(ST_BIND) (symtab->st_info) == STB_WEAK))
matchsym = symtab;
if (matchsym)