* elf/dl-close.c (_dl_close): If dependency is not unloaded make

sure no reference to the unloaded map's search list remains in the
	dependency's scope.

2006-09-16  Jakub Jelinek  <jakub@redhat.com>

	* elf/Makefile: Add rules to build and run unload7 test.
	* elf/unload7.c: New test.
	* elf/unload7mod1.c: New file.
	* elf/unload7mod2.c: New file.
This commit is contained in:
Ulrich Drepper 2006-09-19 14:42:12 +00:00
parent 0466106efc
commit 1ee2ff2053
6 changed files with 90 additions and 3 deletions

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@ -1,3 +1,16 @@
2006-09-19 Ulrich Drepper <drepper@redhat.com>
* elf/dl-close.c (_dl_close): If dependency is not unloaded make
sure no reference to the unloaded map's search list remains in the
dependency's scope.
2006-09-16 Jakub Jelinek <jakub@redhat.com>
* elf/Makefile: Add rules to build and run unload7 test.
* elf/unload7.c: New test.
* elf/unload7mod1.c: New file.
* elf/unload7mod2.c: New file.
2006-09-18 Jakub Jelinek <jakub@redhat.com>
* sysdeps/unix/sysv/linux/sys/ptrace.h (PT_GETEVENTMSG): Fix pasto.

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@ -87,6 +87,7 @@ distribute := rtld-Rules \
unload3mod1.c unload3mod2.c unload3mod3.c unload3mod4.c \
unload4mod1.c unload4mod2.c unload4mod3.c unload4mod4.c \
unload6mod1.c unload6mod2.c unload6mod3.c \
unload7mod1.c unload7mod2.c \
tst-auditmod1.c tst-audit.sh \
order2mod1.c order2mod2.c order2mod3.c order2mod4.c \
tst-stackguard1.c tst-stackguard1-static.c \
@ -168,7 +169,7 @@ tests += loadtest restest1 preloadtest loadfail multiload origtest resolvfail \
tst-align tst-align2 $(tests-execstack-$(have-z-execstack)) \
tst-dlmodcount tst-dlopenrpath tst-deep1 \
tst-dlmopen1 tst-dlmopen2 tst-dlmopen3 \
unload3 unload4 unload5 unload6 tst-global1 order2 \
unload3 unload4 unload5 unload6 unload7 tst-global1 order2 \
tst-audit1 tst-audit2 \
tst-stackguard1 tst-addr1
# reldep9
@ -211,6 +212,7 @@ modules-names = testobj1 testobj2 testobj3 testobj4 testobj5 testobj6 \
unload3mod1 unload3mod2 unload3mod3 unload3mod4 \
unload4mod1 unload4mod2 unload4mod3 unload4mod4 \
unload6mod1 unload6mod2 unload6mod3 \
unload7mod1 unload7mod2 \
order2mod1 order2mod2 order2mod3 order2mod4
ifeq (yes,$(have-initfini-array))
modules-names += tst-array2dep tst-array5dep
@ -455,6 +457,8 @@ $(objpfx)unload4mod2.so: $(objpfx)unload4mod4.so $(objpfx)unload4mod3.so
$(objpfx)unload6mod1.so: $(libdl)
$(objpfx)unload6mod2.so: $(libdl)
$(objpfx)unload6mod3.so: $(libdl)
$(objpfx)unload7mod1.so: $(libdl)
$(objpfx)unload7mod2.so: $(objpfx)unload7mod1.so
LDFLAGS-tst-tlsmod5.so = -nostdlib
LDFLAGS-tst-tlsmod6.so = -nostdlib
@ -732,6 +736,10 @@ $(objpfx)unload6: $(libdl)
$(objpfx)unload6.out: $(objpfx)unload6mod1.so $(objpfx)unload6mod2.so \
$(objpfx)unload6mod3.so
$(objpfx)unload7: $(libdl)
$(objpfx)unload7.out: $(objpfx)unload7mod1.so $(objpfx)unload7mod2.so
unload7-ENV = MALLOC_PERTURB_=85
ifdef libdl
$(objpfx)tst-tls9-static: $(common-objpfx)dlfcn/libdl.a
$(objpfx)tst-tls9-static.out: $(objpfx)tst-tlsmod5.so $(objpfx)tst-tlsmod6.so

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@ -1,5 +1,5 @@
/* Close a shared object opened by `_dl_open'.
Copyright (C) 1996-2002, 2003, 2004, 2005 Free Software Foundation, Inc.
Copyright (C) 1996-2005, 2006 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
@ -330,7 +330,7 @@ _dl_close (void *_map)
for (cnt = 0; imap->l_scope[cnt] != NULL; ++cnt)
/* This relies on l_scope[] entries being always set either
to its own l_symbolic_searchlist address, or some other map's
to its own l_symbolic_searchlist address, or some map's
l_searchlist address. */
if (imap->l_scope[cnt] != &imap->l_symbolic_searchlist)
{
@ -347,6 +347,21 @@ _dl_close (void *_map)
}
}
}
else
{
unsigned int cnt = 0;
while (imap->l_scope[cnt] != NULL)
{
if (imap->l_scope[cnt] == &map->l_searchlist)
{
while ((imap->l_scope[cnt] = imap->l_scope[cnt + 1])
!= NULL)
++cnt;
break;
}
++cnt;
}
}
/* The loader is gone, so mark the object as not having one.
Note: l_idx != -1 -> object will be removed. */

39
elf/unload7.c Normal file
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@ -0,0 +1,39 @@
#include <dlfcn.h>
#include <stdio.h>
int
main (void)
{
void *h = dlopen ("$ORIGIN/unload7mod1.so", RTLD_LAZY);
if (h == NULL)
{
puts ("dlopen unload7mod1.so failed");
return 1;
}
int (*fn) (void);
fn = dlsym (h, "foo");
if (fn == NULL)
{
puts ("dlsym failed");
return 1;
}
int ret = 0;
if (fn () == 0)
++ret;
void *h2 = dlopen ("$ORIGIN/unload7mod2.so", RTLD_LAZY);
if (h2 == NULL)
{
puts ("dlopen unload7mod2.so failed");
return 1;
}
dlclose (h2);
if (fn () == 0)
++ret;
dlclose (h);
return ret;
}

11
elf/unload7mod1.c Normal file
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@ -0,0 +1,11 @@
#include <dlfcn.h>
#include <stdio.h>
int
foo (int i)
{
if (dlsym (RTLD_DEFAULT, "unload7_nonexistent_symbol") == NULL)
return 1;
puts ("dlsym returned non-NULL");
return 0;
}

1
elf/unload7mod2.c Normal file
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@ -0,0 +1 @@
int x;