[cfe-users] MSAN blacklist
Hello, I would like to blacklist some warnings, but everything I tried so far is ignored. # cat msan-blacklist.txt fun:*interceptor_strlen* fun:*foreach_dirinpath* fun:foreach_dirinpath fun:*interceptor_strrchr* fun:*try_dlopen* src:*/ltdl.c src:ltdl.c So I tried to blacklist all kind of combinations of the failing functions and also of the related file - without success. It always fails with the same issue. Uninitialized bytes in __interceptor_strlen at offset 0 inside [0x70335370, 45) ==3968020==WARNING: MemorySanitizer: use-of-uninitialized-value #0 0x7f0f587fa099 in foreach_dirinpath /home/bschubert/src/cci/gerrit/src/libltdl/ltdl.c:699:18 [...] Uninitialized value was created by a heap allocation #0 0x453ebd in __interceptor_malloc (/tmp/ime-server-bernd.0+0x453ebd) #1 0x7f0f568c0f7e in __argz_create_sep (/usr/lib64/libc.so.6+0x90f7e) #2 0x7f0f585f7775 in _dl_fixup (/lib64/ld-linux-x86-64.so.2+0xe775) SUMMARY: MemorySanitizer: use-of-uninitialized-value /home/bschubert/src/cci/gerrit/src/libltdl/ltdl.c:699:18 in foreach_dirinpath Exiting libcci and the main project I'm working on is compiled liked this libtool: compile: /opt/llvm-5.0.1/bin/clang -DHAVE_CONFIG_H -I. -DLTDLOPEN=libltdlc "-DLT_CONFIG_H=" -DLTDL -I. -I. -Ilibltdl -I./libltdl -I./libltdl -ggdb3 -O2 -fsanitize=memory -fsanitize-memory-track-origins -fsanitize-memory-use-after-dtor -fsanitize-blacklist=msan-blacklist.txt -MT libltdlc_la-lt_dlloader.lo -MD -MP -MF .deps/libltdlc_la-lt_dlloader.Tpo -c lt_dlloader.c -fPIC -DPIC -o .libs/libltdlc_la-lt_dlloader.o Any ideas? Thanks, Bernd ___ cfe-users mailing list cfe-users@lists.llvm.org http://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-users
Re: [cfe-users] Regarding issue with compilation of multiple source files
can you show the actual command & it's exact output? I'm guessing you've got a -c (or -S, etc) in there somewhere, perhaps? On Wed, Jan 24, 2018 at 12:08 AM Sameer Joshi via cfe-users < cfe-users@lists.llvm.org> wrote: > Hi, > > I am compiling multiple source files and trying to generate one executable > out of it and getting following error: > > "cannot specify -o when generating multiple output files" > > The command is like following: > > $ clang++ exec_1.bin 1.cpp 2.cpp. 3.cpp > > Please let me know how to solve this issue. > > Regards, > > Sameer Joshi > ___ > cfe-users mailing list > cfe-users@lists.llvm.org > http://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-users > ___ cfe-users mailing list cfe-users@lists.llvm.org http://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-users
Re: [cfe-users] MSAN blacklist
This is a report from an interceptor, it is not affected by blacklist, unfortunately. You could try MSAN_OPTIONS=intercept_strlen=0, but it is likely that something else will pop up instead. Try figuring out what is the actual reason for the report, i.e. what code is supposed to initialize this memory. Is it some other library that can be built with MSan? A better place for such questions is https://github.com/google/sanitizers/issues On Mon, Jan 29, 2018 at 5:59 AM, Bernd Schubert via cfe-users wrote: > Hello, > > I would like to blacklist some warnings, but everything I tried > so far is ignored. > > # cat msan-blacklist.txt > fun:*interceptor_strlen* > fun:*foreach_dirinpath* > fun:foreach_dirinpath > fun:*interceptor_strrchr* > fun:*try_dlopen* > src:*/ltdl.c > src:ltdl.c > > So I tried to blacklist all kind of combinations of the failing > functions and also of the related file - without success. It always > fails with the same issue. > > > > Uninitialized bytes in __interceptor_strlen at offset 0 inside > [0x70335370, 45) > ==3968020==WARNING: MemorySanitizer: use-of-uninitialized-value > #0 0x7f0f587fa099 in foreach_dirinpath > /home/bschubert/src/cci/gerrit/src/libltdl/ltdl.c:699:18 > [...] > > Uninitialized value was created by a heap allocation > #0 0x453ebd in __interceptor_malloc (/tmp/ime-server-bernd.0+0x453ebd) > #1 0x7f0f568c0f7e in __argz_create_sep (/usr/lib64/libc.so.6+0x90f7e) > #2 0x7f0f585f7775 in _dl_fixup (/lib64/ld-linux-x86-64.so.2+0xe775) > > SUMMARY: MemorySanitizer: use-of-uninitialized-value > /home/bschubert/src/cci/gerrit/src/libltdl/ltdl.c:699:18 in > foreach_dirinpath > Exiting > > > libcci and the main project I'm working on is compiled liked this > > libtool: compile: /opt/llvm-5.0.1/bin/clang -DHAVE_CONFIG_H -I. > -DLTDLOPEN=libltdlc "-DLT_CONFIG_H=" -DLTDL -I. -I. -Ilibltdl > -I./libltdl -I./libltdl -ggdb3 -O2 -fsanitize=memory > -fsanitize-memory-track-origins -fsanitize-memory-use-after-dtor > -fsanitize-blacklist=msan-blacklist.txt -MT libltdlc_la-lt_dlloader.lo > -MD -MP -MF .deps/libltdlc_la-lt_dlloader.Tpo -c lt_dlloader.c -fPIC > -DPIC -o .libs/libltdlc_la-lt_dlloader.o > > > Any ideas? > > > Thanks, > Bernd > ___ > cfe-users mailing list > cfe-users@lists.llvm.org > http://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-users ___ cfe-users mailing list cfe-users@lists.llvm.org http://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-users
