https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82616
Bug ID: 82616
Summary: ../bfd/.libs/libbfd.a(plugin.o): undefined reference
to symbol 'dlsym@@GLIBC_2.16'
Product: gcc
Version: 8.0
URL: https://sourceware.org/bugzilla/show_bug.cgi?id=22318
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: sanitizer
Assignee: unassigned at gcc dot gnu.org
Reporter: hjl.tools at gmail dot com
CC: dodji at gcc dot gnu.org, dvyukov at gcc dot gnu.org,
jakub at gcc dot gnu.org, kcc at gcc dot gnu.org, marxin at
gcc dot gnu.org
Target Milestone: ---
config/plugins.m4 is shared with binutils. It has
if test "$plugins" = "yes"; then
AC_SEARCH_LIBS([dlopen], [dl])
fi
plugins use dlsym, but libasan.so only intercepts dlopen, not dlsym:
[hjl@gnu-tools-1 binutils-x32-text]$ 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-x32-text]$
Testing dlopen for libdl leads to false negative when -fsanitize=address
is used.
