Use dlsym to check if libdl is needed for plugin
config/plugins.m4 has
if test "$plugins" = "yes"; then
AC_SEARCH_LIBS([dlopen], [dl])
fi
Plugin uses dlsym, but libasan.so only intercepts dlopen, not dlsym:
[hjl@gnu-tools-1 binutils-text]$ nm -D /lib64/libasan.so.4| grep " dl"
0000000000038580 W dlclose
U dl_iterate_phdr
000000000004dc50 W dlopen
U dlsym
U dlvsym
[hjl@gnu-tools-1 binutils-text]$
Testing dlopen for libdl leads to false negative when -fsanitize=address
is used. It results in link failure:
../bfd/.libs/libbfd.a(plugin.o): undefined reference to symbol 'dlsym@@GLIBC_2.16'
dlsym should be used to check if libdl is needed for plugin.
bfd/
PR gas/22318
* configure: Regenerated.
binutils/
PR gas/22318
* configure: Regenerated.
gas/
PR gas/22318
* configure: Regenerated.
gprof/
PR gas/22318
* configure: Regenerated.
ld/
PR gas/22318
* configure: Regenerated.
This commit is contained in:
H.J. Lu
parent
552d4da417
commit
3cba8b6c93
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@ -1,3 +1,8 @@
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2018-04-05 H.J. Lu <hongjiu.lu@intel.com>
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PR gas/22318
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* configure: Regenerated.
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2018-04-05 Alan Modra <amodra@gmail.com>
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* elf-hppa.h (elf_hppa_info_to_howto): Init howto to NULL.
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@ -11828,9 +11828,9 @@ else
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fi
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if test "$plugins" = "yes"; then
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{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for library containing dlopen" >&5
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$as_echo_n "checking for library containing dlopen... " >&6; }
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if test "${ac_cv_search_dlopen+set}" = set; then :
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{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for library containing dlsym" >&5
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$as_echo_n "checking for library containing dlsym... " >&6; }
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if test "${ac_cv_search_dlsym+set}" = set; then :
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$as_echo_n "(cached) " >&6
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else
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ac_func_search_save_LIBS=$LIBS
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@ -11843,11 +11843,11 @@ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
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#ifdef __cplusplus
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extern "C"
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#endif
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char dlopen ();
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char dlsym ();
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int
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main ()
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{
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return dlopen ();
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return dlsym ();
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;
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return 0;
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}
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@ -11860,25 +11860,25 @@ for ac_lib in '' dl; do
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LIBS="-l$ac_lib $ac_func_search_save_LIBS"
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fi
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if ac_fn_c_try_link "$LINENO"; then :
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ac_cv_search_dlopen=$ac_res
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ac_cv_search_dlsym=$ac_res
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fi
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rm -f core conftest.err conftest.$ac_objext \
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conftest$ac_exeext
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if test "${ac_cv_search_dlopen+set}" = set; then :
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if test "${ac_cv_search_dlsym+set}" = set; then :
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break
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fi
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done
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if test "${ac_cv_search_dlopen+set}" = set; then :
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if test "${ac_cv_search_dlsym+set}" = set; then :
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else
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ac_cv_search_dlopen=no
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ac_cv_search_dlsym=no
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fi
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rm conftest.$ac_ext
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LIBS=$ac_func_search_save_LIBS
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fi
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{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search_dlopen" >&5
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$as_echo "$ac_cv_search_dlopen" >&6; }
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ac_res=$ac_cv_search_dlopen
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{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search_dlsym" >&5
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$as_echo "$ac_cv_search_dlsym" >&6; }
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ac_res=$ac_cv_search_dlsym
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if test "$ac_res" != no; then :
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test "$ac_res" = "none required" || LIBS="$ac_res $LIBS"
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@ -1,3 +1,8 @@
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2018-04-05 H.J. Lu <hongjiu.lu@intel.com>
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PR gas/22318
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* configure: Regenerated.
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2018-04-05 Maciej W. Rozycki <macro@mips.com>
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* testsuite/binutils-all/strip-13mips64.s: Use `.dc.l' rather
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@ -11622,9 +11622,9 @@ else
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fi
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if test "$plugins" = "yes"; then
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{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for library containing dlopen" >&5
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$as_echo_n "checking for library containing dlopen... " >&6; }
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if test "${ac_cv_search_dlopen+set}" = set; then :
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{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for library containing dlsym" >&5
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$as_echo_n "checking for library containing dlsym... " >&6; }
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if test "${ac_cv_search_dlsym+set}" = set; then :
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$as_echo_n "(cached) " >&6
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else
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ac_func_search_save_LIBS=$LIBS
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@ -11637,11 +11637,11 @@ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
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#ifdef __cplusplus
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extern "C"
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#endif
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char dlopen ();
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char dlsym ();
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int
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main ()
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{
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return dlopen ();
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return dlsym ();
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;
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return 0;
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}
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@ -11654,25 +11654,25 @@ for ac_lib in '' dl; do
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LIBS="-l$ac_lib $ac_func_search_save_LIBS"
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fi
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if ac_fn_c_try_link "$LINENO"; then :
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ac_cv_search_dlopen=$ac_res
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ac_cv_search_dlsym=$ac_res
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fi
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rm -f core conftest.err conftest.$ac_objext \
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conftest$ac_exeext
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if test "${ac_cv_search_dlopen+set}" = set; then :
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if test "${ac_cv_search_dlsym+set}" = set; then :
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break
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fi
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done
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if test "${ac_cv_search_dlopen+set}" = set; then :
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if test "${ac_cv_search_dlsym+set}" = set; then :
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else
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ac_cv_search_dlopen=no
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ac_cv_search_dlsym=no
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fi
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rm conftest.$ac_ext
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LIBS=$ac_func_search_save_LIBS
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fi
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{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search_dlopen" >&5
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$as_echo "$ac_cv_search_dlopen" >&6; }
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ac_res=$ac_cv_search_dlopen
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{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search_dlsym" >&5
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$as_echo "$ac_cv_search_dlsym" >&6; }
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ac_res=$ac_cv_search_dlsym
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if test "$ac_res" != no; then :
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test "$ac_res" = "none required" || LIBS="$ac_res $LIBS"
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@ -1,3 +1,8 @@
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2018-04-05 H.J. Lu <hongjiu.lu@intel.com>
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PR gas/22318
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* configure: Regenerated.
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2018-04-04 H.J. Lu <hongjiu.lu@intel.com>
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PR binutils/23025
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@ -11383,9 +11383,9 @@ else
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fi
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if test "$plugins" = "yes"; then
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{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for library containing dlopen" >&5
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$as_echo_n "checking for library containing dlopen... " >&6; }
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if test "${ac_cv_search_dlopen+set}" = set; then :
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{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for library containing dlsym" >&5
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$as_echo_n "checking for library containing dlsym... " >&6; }
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if test "${ac_cv_search_dlsym+set}" = set; then :
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$as_echo_n "(cached) " >&6
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else
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ac_func_search_save_LIBS=$LIBS
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@ -11398,11 +11398,11 @@ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
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#ifdef __cplusplus
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extern "C"
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#endif
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char dlopen ();
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char dlsym ();
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int
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main ()
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{
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return dlopen ();
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return dlsym ();
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;
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return 0;
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}
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@ -11415,25 +11415,25 @@ for ac_lib in '' dl; do
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LIBS="-l$ac_lib $ac_func_search_save_LIBS"
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fi
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if ac_fn_c_try_link "$LINENO"; then :
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ac_cv_search_dlopen=$ac_res
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ac_cv_search_dlsym=$ac_res
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fi
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rm -f core conftest.err conftest.$ac_objext \
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conftest$ac_exeext
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if test "${ac_cv_search_dlopen+set}" = set; then :
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if test "${ac_cv_search_dlsym+set}" = set; then :
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break
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fi
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done
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if test "${ac_cv_search_dlopen+set}" = set; then :
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if test "${ac_cv_search_dlsym+set}" = set; then :
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else
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ac_cv_search_dlopen=no
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ac_cv_search_dlsym=no
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fi
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rm conftest.$ac_ext
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LIBS=$ac_func_search_save_LIBS
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fi
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{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search_dlopen" >&5
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$as_echo "$ac_cv_search_dlopen" >&6; }
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ac_res=$ac_cv_search_dlopen
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{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search_dlsym" >&5
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$as_echo "$ac_cv_search_dlsym" >&6; }
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ac_res=$ac_cv_search_dlsym
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if test "$ac_res" != no; then :
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test "$ac_res" = "none required" || LIBS="$ac_res $LIBS"
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@ -1,3 +1,8 @@
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2018-04-05 H.J. Lu <hongjiu.lu@intel.com>
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PR gas/22318
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* configure: Regenerated.
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2018-03-01 Alan Modra <amodra@gmail.com>
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* configure.ac (ALL_LINGUAS): Add it, ro, ru, uk. Sort.
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@ -11298,9 +11298,9 @@ else
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fi
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if test "$plugins" = "yes"; then
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{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for library containing dlopen" >&5
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$as_echo_n "checking for library containing dlopen... " >&6; }
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if test "${ac_cv_search_dlopen+set}" = set; then :
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{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for library containing dlsym" >&5
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$as_echo_n "checking for library containing dlsym... " >&6; }
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if test "${ac_cv_search_dlsym+set}" = set; then :
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$as_echo_n "(cached) " >&6
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else
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ac_func_search_save_LIBS=$LIBS
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@ -11313,11 +11313,11 @@ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
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#ifdef __cplusplus
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extern "C"
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#endif
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char dlopen ();
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char dlsym ();
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int
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main ()
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{
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return dlopen ();
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return dlsym ();
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;
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return 0;
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}
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@ -11330,25 +11330,25 @@ for ac_lib in '' dl; do
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LIBS="-l$ac_lib $ac_func_search_save_LIBS"
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fi
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if ac_fn_c_try_link "$LINENO"; then :
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ac_cv_search_dlopen=$ac_res
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ac_cv_search_dlsym=$ac_res
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fi
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rm -f core conftest.err conftest.$ac_objext \
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conftest$ac_exeext
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if test "${ac_cv_search_dlopen+set}" = set; then :
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if test "${ac_cv_search_dlsym+set}" = set; then :
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break
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fi
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done
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if test "${ac_cv_search_dlopen+set}" = set; then :
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if test "${ac_cv_search_dlsym+set}" = set; then :
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else
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ac_cv_search_dlopen=no
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ac_cv_search_dlsym=no
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fi
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rm conftest.$ac_ext
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LIBS=$ac_func_search_save_LIBS
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fi
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{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search_dlopen" >&5
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$as_echo "$ac_cv_search_dlopen" >&6; }
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ac_res=$ac_cv_search_dlopen
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{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search_dlsym" >&5
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$as_echo "$ac_cv_search_dlsym" >&6; }
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ac_res=$ac_cv_search_dlsym
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if test "$ac_res" != no; then :
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test "$ac_res" = "none required" || LIBS="$ac_res $LIBS"
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@ -1,3 +1,8 @@
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2018-04-05 H.J. Lu <hongjiu.lu@intel.com>
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PR gas/22318
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* configure: Regenerated.
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2018-04-05 Nick Clifton <nickc@redhat.com>
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PR 23030
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@ -15139,9 +15139,9 @@ else
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fi
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if test "$plugins" = "yes"; then
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{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for library containing dlopen" >&5
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$as_echo_n "checking for library containing dlopen... " >&6; }
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if test "${ac_cv_search_dlopen+set}" = set; then :
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{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for library containing dlsym" >&5
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$as_echo_n "checking for library containing dlsym... " >&6; }
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if test "${ac_cv_search_dlsym+set}" = set; then :
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$as_echo_n "(cached) " >&6
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else
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ac_func_search_save_LIBS=$LIBS
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@ -15154,11 +15154,11 @@ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
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#ifdef __cplusplus
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extern "C"
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#endif
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char dlopen ();
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char dlsym ();
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int
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main ()
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{
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return dlopen ();
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return dlsym ();
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;
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return 0;
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}
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@ -15171,25 +15171,25 @@ for ac_lib in '' dl; do
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LIBS="-l$ac_lib $ac_func_search_save_LIBS"
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fi
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if ac_fn_c_try_link "$LINENO"; then :
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ac_cv_search_dlopen=$ac_res
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ac_cv_search_dlsym=$ac_res
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fi
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rm -f core conftest.err conftest.$ac_objext \
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conftest$ac_exeext
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if test "${ac_cv_search_dlopen+set}" = set; then :
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if test "${ac_cv_search_dlsym+set}" = set; then :
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break
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fi
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done
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if test "${ac_cv_search_dlopen+set}" = set; then :
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if test "${ac_cv_search_dlsym+set}" = set; then :
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else
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ac_cv_search_dlopen=no
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ac_cv_search_dlsym=no
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fi
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rm conftest.$ac_ext
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LIBS=$ac_func_search_save_LIBS
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fi
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{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search_dlopen" >&5
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$as_echo "$ac_cv_search_dlopen" >&6; }
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ac_res=$ac_cv_search_dlopen
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{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search_dlsym" >&5
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$as_echo "$ac_cv_search_dlsym" >&6; }
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ac_res=$ac_cv_search_dlsym
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if test "$ac_res" != no; then :
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test "$ac_res" = "none required" || LIBS="$ac_res $LIBS"
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|
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Loading…
Reference in New Issue