[Bug sanitizer/80027] New: ASAN breaks DT_RPATH $ORIGIN in dlopen()

[michael.thayer at oracle dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80027

            Bug ID: 80027
           Summary: ASAN breaks DT_RPATH $ORIGIN in dlopen()
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: sanitizer
          Assignee: unassigned at gcc dot gnu.org
          Reporter: michael.thayer at oracle 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
  Target Milestone: ---

Created attachment 40957
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=40957&action=edit
Preprocessed demonstration code

When I build a small test programme with DT_RPATH $ORIGIN set and address
sanitiser enabled, if fails to find a shared object "test.so" in the same
folder as the binary.  If I leave off "-fsanitize=address" (the preprocessor
output produced is identical) it finds the library.  gcc output below,
preprocessor output attached.

$ gcc -v --save-temps test.c -o test -ldl -Wl,-rpath,'$ORIGIN'
-fsanitize=address
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/6/lto-wrapper
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu 6.3.0-8ubuntu1'
--with-bugurl=file:///usr/share/doc/gcc-6/README.Bugs
--enable-languages=c,ada,c++,java,go,d,fortran,objc,obj-c++ --prefix=/usr
--program-suffix=-6 --program-prefix=x86_64-linux-gnu- --enable-shared
--enable-linker-build-id --libexecdir=/usr/lib --without-included-gettext
--enable-threads=posix --libdir=/usr/lib --enable-nls --with-sysroot=/
--enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes
--with-default-libstdcxx-abi=new --enable-gnu-unique-object
--disable-vtable-verify --enable-libmpx --enable-plugin --enable-default-pie
--with-system-zlib --disable-browser-plugin --enable-java-awt=gtk
--enable-gtk-cairo --with-java-home=/usr/lib/jvm/java-1.5.0-gcj-6-amd64/jre
--enable-java-home --with-jvm-root-dir=/usr/lib/jvm/java-1.5.0-gcj-6-amd64
--with-jvm-jar-dir=/usr/lib/jvm-exports/java-1.5.0-gcj-6-amd64
--with-arch-directory=amd64 --with-ecj-jar=/usr/share/java/eclipse-ecj.jar
--with-target-system-zlib --enable-objc-gc=auto --enable-multiarch
--disable-werror --with-arch-32=i686 --with-abi=m64
--with-multilib-list=m32,m64,mx32 --enable-multilib --with-tune=generic
--enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu
--target=x86_64-linux-gnu
Thread model: posix
gcc version 6.3.0 20170221 (Ubuntu 6.3.0-8ubuntu1) 
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-o' 'test' '-fsanitize=address'
'-mtune=generic' '-march=x86-64'
 /usr/lib/gcc/x86_64-linux-gnu/6/cc1 -E -quiet -v -imultiarch x86_64-linux-gnu
test.c -mtune=generic -march=x86-64 -fsanitize=address -fpch-preprocess
-fstack-protector-strong -Wformat -Wformat-security -o test.i
ignoring nonexistent directory "/usr/local/include/x86_64-linux-gnu"
ignoring nonexistent directory
"/usr/lib/gcc/x86_64-linux-gnu/6/../../../../x86_64-linux-gnu/include"
#include "..." search starts here:
#include <...> search starts here:
 /usr/lib/gcc/x86_64-linux-gnu/6/include
 /usr/local/include
 /usr/lib/gcc/x86_64-linux-gnu/6/include-fixed
 /usr/include/x86_64-linux-gnu
 /usr/include
End of search list.
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-o' 'test' '-fsanitize=address'
'-mtune=generic' '-march=x86-64'
 /usr/lib/gcc/x86_64-linux-gnu/6/cc1 -fpreprocessed test.i -quiet -dumpbase
test.c -mtune=generic -march=x86-64 -auxbase test -version -fsanitize=address
-fstack-protector-strong -Wformat -Wformat-security -o test.s
GNU C11 (Ubuntu 6.3.0-8ubuntu1) version 6.3.0 20170221 (x86_64-linux-gnu)
        compiled by GNU C version 6.3.0 20170221, GMP version 6.1.2, MPFR
version 3.1.5, MPC version 1.0.3, isl version 0.15
warning: GMP header version 6.1.2 differs from library version 6.1.1.
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
GNU C11 (Ubuntu 6.3.0-8ubuntu1) version 6.3.0 20170221 (x86_64-linux-gnu)
        compiled by GNU C version 6.3.0 20170221, GMP version 6.1.2, MPFR
version 3.1.5, MPC version 1.0.3, isl version 0.15
warning: GMP header version 6.1.2 differs from library version 6.1.1.
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
Compiler executable checksum: efffe3a8eab4a38b76a97676d9f27d34
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-o' 'test' '-fsanitize=address'
'-mtune=generic' '-march=x86-64'
 as -v --64 -o test.o test.s
GNU assembler version 2.28 (x86_64-linux-gnu) using BFD version (GNU Binutils
for Ubuntu) 2.28
COMPILER_PATH=/usr/lib/gcc/x86_64-linux-gnu/6/:/usr/lib/gcc/x86_64-linux-gnu/6/:/usr/lib/gcc/x86_64-linux-gnu/:/usr/lib/gcc/x86_64-linux-gnu/6/:/usr/lib/gcc/x86_64-linux-gnu/
LIBRARY_PATH=/usr/lib/gcc/x86_64-linux-gnu/6/:/usr/lib/gcc/x86_64-linux-gnu/6/../../../x86_64-linux-gnu/:/usr/lib/gcc/x86_64-linux-gnu/6/../../../../lib/:/lib/x86_64-linux-gnu/:/lib/../lib/:/usr/lib/x86_64-linux-gnu/:/usr/lib/../lib/:/usr/lib/gcc/x86_64-linux-gnu/6/../../../:/lib/:/usr/lib/
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-o' 'test' '-fsanitize=address'
'-mtune=generic' '-march=x86-64'
 /usr/lib/gcc/x86_64-linux-gnu/6/collect2 -plugin
/usr/lib/gcc/x86_64-linux-gnu/6/liblto_plugin.so
-plugin-opt=/usr/lib/gcc/x86_64-linux-gnu/6/lto-wrapper
-plugin-opt=-fresolution=test.res -plugin-opt=-pass-through=-lgcc
-plugin-opt=-pass-through=-lgcc_s -plugin-opt=-pass-through=-lc
-plugin-opt=-pass-through=-lgcc -plugin-opt=-pass-through=-lgcc_s --sysroot=/
--build-id --eh-frame-hdr -m elf_x86_64 --hash-style=gnu --as-needed
-dynamic-linker /lib64/ld-linux-x86-64.so.2 -pie -z now -z relro -o test
/usr/lib/gcc/x86_64-linux-gnu/6/../../../x86_64-linux-gnu/Scrt1.o
/usr/lib/gcc/x86_64-linux-gnu/6/../../../x86_64-linux-gnu/crti.o
/usr/lib/gcc/x86_64-linux-gnu/6/crtbeginS.o -L/usr/lib/gcc/x86_64-linux-gnu/6
-L/usr/lib/gcc/x86_64-linux-gnu/6/../../../x86_64-linux-gnu
-L/usr/lib/gcc/x86_64-linux-gnu/6/../../../../lib -L/lib/x86_64-linux-gnu
-L/lib/../lib -L/usr/lib/x86_64-linux-gnu -L/usr/lib/../lib
-L/usr/lib/gcc/x86_64-linux-gnu/6/../../..
/usr/lib/gcc/x86_64-linux-gnu/6/libasan_preinit.o --push-state --no-as-needed
-lasan --pop-state test.o -ldl -rpath $ORIGIN -lgcc --as-needed -lgcc_s
--no-as-needed -lc -lgcc --as-needed -lgcc_s --no-as-needed
/usr/lib/gcc/x86_64-linux-gnu/6/crtendS.o
/usr/lib/gcc/x86_64-linux-gnu/6/../../../x86_64-linux-gnu/crtn.o
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-o' 'test' '-fsanitize=address'
'-mtune=generic' '-march=x86-64'