The same 2 patches also apply to toolchain 3.8.1-15 (with some offsets), but I haven`t testing building it
2016-11-11 1:25 GMT+01:00 Norbert Lange <nolang...@gmail.com>: > BTW. make check-sanitizer would have likely found this issue, might > want to enable it? > I believe it knows which sanitizers should work > > 2016-11-11 0:46 GMT+01:00 Norbert Lange <nolang...@gmail.com>: >> Tags: patch >> >> >> Hi, >> >> I got it working, seems that from the 3 related patched, one is already >> applied. >> The attached archive is the 3 patches and a edited "series" file, >> it should be painless for you to integrate it into the debian/patches >> directory for 3.9 >> >> I did not try with 3.8 yet (possibly more difficult), building llvm >> takes quite a while. >> >> Kind Regards, >> Norbert >> >> 2016-11-09 11:04 GMT+01:00 Norbert Lange <nolang...@gmail.com>: >>> Hi, >>> >>> researched a bit further and the same compiled programm will run fine >>> on debian jessie. >>> I tracked it down to being caused by a newer glibc version [1][2], >>> apparently during loading of shared libs, glibc can now allocate >>> memory which messes up sanitzers (mostly in more subtile ways than the >>> memory sanitizer). >>> >>> The result is, that if stretch will ship with the current glibc, clang >>> and gcc (I dont think its patched there either), then the sanitizers >>> won`t be usable. >>> 1) revert the fix in glibc. Would have the advantage that "sanitized" >>> binaries compiled from current and older clang/gcc versions will work >>> 2) adopt the fixed from upstream [3][4] (possibly more) into clang >>> (and possibly gcc). >>> or maybe both? >>> >>> Kind Regards, >>> Norbert >>> >>> PS. shouldn`t the testsuite catch these bugs? >>> >>> [1] >>> https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=24e2b1cede1952d7d4411a3cafd25dd8593dab9f >>> [2] https://llvm.org/bugs/show_bug.cgi?id=27310 >>> [3] >>> https://github.com/llvm-mirror/compiler-rt/commit/827ea206c1078fc7c7da287984a7ba4563390589 >>> [4] >>> https://github.com/llvm-mirror/compiler-rt/commit/570ee9dd7a6f90b0370a86535cbde6738d0ccf67 >>> >>> 2016-10-31 21:43 GMT+01:00 Norbert Lange <nolang...@gmail.com>: >>>> On Mon, 31 Oct 2016 08:38:21 +0100 Sylvestre Ledru <sylves...@debian.org> >>>> wrote: >>>>> Le 31/10/2016 à 00:39, Norbert Lange a écrit : >>>>> > Package: clang-3.9 >>>>> > Version: 1:3.9-2 >>>>> > Severity: normal >>>>> > >>>>> > Dear Maintainer, >>>>> > >>>>> > The memory sanitizer is unusable as it segfaults during initialization. >>>>> > To reproduce: >>>>> > echo 'int main() { return 0; }' >/tmp/test.c >>>>> > clang -fsanitize=memory -o test test.c >>>>> can you try with clang-3.9 instead? >>>> >>>> Same thing, output: >>>> >>>> $ clang-3.9 -fsanitize=memory -o test test.c -v >>>> clang version 3.9.0-2 (tags/RELEASE_390/final) >>>> Target: x86_64-pc-linux-gnu >>>> Thread model: posix >>>> InstalledDir: /usr/bin >>>> Found candidate GCC installation: /usr/bin/../lib/gcc/i686-linux-gnu/6 >>>> Found candidate GCC installation: /usr/bin/../lib/gcc/i686-linux-gnu/6.2.0 >>>> Found candidate GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/5 >>>> Found candidate GCC installation: >>>> /usr/bin/../lib/gcc/x86_64-linux-gnu/5.4.1 >>>> Found candidate GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/6 >>>> Found candidate GCC installation: >>>> /usr/bin/../lib/gcc/x86_64-linux-gnu/6.2.0 >>>> Found candidate GCC installation: /usr/lib/gcc/i686-linux-gnu/6 >>>> Found candidate GCC installation: /usr/lib/gcc/i686-linux-gnu/6.2.0 >>>> Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/5 >>>> Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/5.4.1 >>>> Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/6 >>>> Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/6.2.0 >>>> Selected GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/6.2.0 >>>> Candidate multilib: .;@m64 >>>> Candidate multilib: 32;@m32 >>>> Candidate multilib: x32;@mx32 >>>> Selected multilib: .;@m64 >>>> "/usr/lib/llvm-3.9/bin/clang" -cc1 -triple x86_64-pc-linux-gnu >>>> -emit-obj -mrelax-all -disable-free -disable-llvm-verifier >>>> -discard-value-names -main-file-name test.c -mrelocation-model static >>>> -mthread-model posix -mdisable-fp-elim -fmath-errno -masm-verbose >>>> -mconstructor-aliases -munwind-tables -fuse-init-array -target-cpu >>>> x86-64 -v -dwarf-column-info -debugger-tuning=gdb -resource-dir >>>> /usr/lib/llvm-3.9/bin/../lib/clang/3.9.0 -internal-isystem >>>> /usr/local/include -internal-isystem >>>> /usr/lib/llvm-3.9/bin/../lib/clang/3.9.0/include >>>> -internal-externc-isystem /usr/include/x86_64-linux-gnu >>>> -internal-externc-isystem /include -internal-externc-isystem >>>> /usr/include -fdebug-compilation-dir /tmp -ferror-limit 19 >>>> -fmessage-length 135 -fsanitize=memory >>>> -fsanitize-blacklist=/usr/lib/llvm-3.9/bin/../lib/clang/3.9.0/msan_blacklist.txt >>>> -fno-assume-sane-operator-new -fobjc-runtime=gcc >>>> -fdiagnostics-show-option -fcolor-diagnostics -o /tmp/test-2d4d2c.o -x >>>> c test.c >>>> clang -cc1 version 3.9.0 based upon LLVM 3.9.0 default target >>>> x86_64-pc-linux-gnu >>>> ignoring nonexistent directory "/include" >>>> #include "..." search starts here: >>>> #include <...> search starts here: >>>> /usr/local/include >>>> /usr/lib/llvm-3.9/bin/../lib/clang/3.9.0/include >>>> /usr/include/x86_64-linux-gnu >>>> /usr/include >>>> End of search list. >>>> "/usr/bin/ld" --hash-style=both --eh-frame-hdr -m elf_x86_64 >>>> -dynamic-linker /lib64/ld-linux-x86-64.so.2 -o test >>>> /usr/bin/../lib/gcc/x86_64-linux-gnu/6.2.0/../../../x86_64-linux-gnu/crt1.o >>>> /usr/bin/../lib/gcc/x86_64-linux-gnu/6.2.0/../../../x86_64-linux-gnu/crti.o >>>> /usr/bin/../lib/gcc/x86_64-linux-gnu/6.2.0/crtbegin.o >>>> -L/usr/bin/../lib/gcc/x86_64-linux-gnu/6.2.0 >>>> -L/usr/bin/../lib/gcc/x86_64-linux-gnu/6.2.0/../../../x86_64-linux-gnu >>>> -L/lib/x86_64-linux-gnu -L/lib/../lib64 -L/usr/lib/x86_64-linux-gnu >>>> -L/usr/bin/../lib/gcc/x86_64-linux-gnu/6.2.0/../../.. >>>> -L/usr/lib/llvm-3.9/bin/../lib -L/lib -L/usr/lib -whole-archive >>>> /usr/lib/llvm-3.9/bin/../lib/clang/3.9.0/lib/linux/libclang_rt.msan-x86_64.a >>>> -no-whole-archive >>>> --dynamic-list=/usr/lib/llvm-3.9/bin/../lib/clang/3.9.0/lib/linux/libclang_rt.msan-x86_64.a.syms >>>> /tmp/test-2d4d2c.o --no-as-needed -lpthread -lrt -lm -ldl -lgcc >>>> --as-needed -lgcc_s --no-as-needed -lc -lgcc --as-needed -lgcc_s >>>> --no-as-needed /usr/bin/../lib/gcc/x86_64-linux-gnu/6.2.0/crtend.o >>>> /usr/bin/../lib/gcc/x86_64-linux-gnu/6.2.0/../../../x86_64-linux-gnu/crtn.o