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
msan_patch_3.9.tar.gz
Description: GNU Zip compressed data
