Hi Joe, Internally we run with ubsan and asan regularly. For ARM there should be nothing to worry about (some reg index enums that are not cast the right way).
For some of the other ISAs there are lots (really lots and lots) of issues being flagged. Shifts with negative operands, booleans that are not 0 or 1, etc. Someone familiar with the details should have a look. X86 in particular. clang is even more strict than gcc. Andreas On 23/09/2015 23:08, "gem5-dev on behalf of Gross, Joe" <[email protected] on behalf of [email protected]> wrote: >Thanks, Andreas, I was able to use these versions to build and run as >well. Have you run with the undefined behavior and address sanitizers? It >looks like gcc5 is a lot more picky about some things. > >Joe >________________________________________ >From: gem5-dev [[email protected]] on behalf of Andreas Hansson >[[email protected]] >Sent: Sunday, September 20, 2015 11:57 AM >To: gem5 Developer List >Subject: Re: [gem5-dev] Review Request 2766: misc: Appease gcc 5.1 > >Hi Joe, > >I don’t dare say exactly, but at the moment we are using swig 3.0.2 (and >it works fine with gcc 5.1.1) > >Andreas > >On 18/09/2015 23:04, "gem5-dev on behalf of Gross, Joe" ><[email protected] on behalf of [email protected]> wrote: > >>Hi Andreas, >> >>Did you use any specific version of swig to build under gcc 5.1? I'm >>testing this but am having problems and I figure it's due to a version >>problem. Please let me know if you made changes to build with 5.1. >>Thanks. >> >>Joe >> >>-----Original Message----- >>From: gem5-dev [mailto:[email protected]] On Behalf Of Andreas >>Hansson >>Sent: Saturday, May 09, 2015 7:41 AM >>To: Andreas Hansson; Default; Steve Reinhardt >>Subject: Re: [gem5-dev] Review Request 2766: misc: Appease gcc 5.1 >> >> >> >>> On May 8, 2015, 5:07 p.m., Steve Reinhardt wrote: >>> > Ship It! >> >>A minor update. This patch does not affect runtime, but switching from >>gcc 4.9.1 to 5.1.0 actually slows gem5 down by 4% on average (at least on >>the two hosts I've run the regressions). The 4% is the increase in the >>total regression CPU times, but the impact seems to be roughly the same >>across the board. >> >> >>- Andreas >> >> >>----------------------------------------------------------- >>This is an automatically generated e-mail. To reply, visit: >>http://reviews.gem5.org/r/2766/#review6126 >>----------------------------------------------------------- >> >> >>On May 8, 2015, 1:10 p.m., Andreas Hansson wrote: >>> >>> ----------------------------------------------------------- >>> This is an automatically generated e-mail. To reply, visit: >>> http://reviews.gem5.org/r/2766/ >>> ----------------------------------------------------------- >>> >>> (Updated May 8, 2015, 1:10 p.m.) >>> >>> >>> Review request for Default. >>> >>> >>> Repository: gem5 >>> >>> >>> Description >>> ------- >>> >>> Changeset 10832:4d7b7d5e972d >>> --------------------------- >>> misc: Appease gcc 5.1 >>> >>> Three minor issues are resolved: >>> >>> 1. Apparently gcc 5.1 does not like negation of booleans followed by >>> bitwise AND. >>> >>> 2. Somehow the compiler also gets confused and warns about >>> NoopMachInst being unused (removing it causes compilation errors >>> though). Most likely a compiler bug. >>> >>> 3. There seems to be a number of instances where loop unrolling causes >>> false positives for the array-bounds check. For now, switch to >>> std::array. Potentially we could disable the warning for newer gcc >>> versions, but switching to std::array is probably a good move in >>> any case. >>> >>> >>> Diffs >>> ----- >>> >>> src/arch/x86/insts/microop.cc fbdaa08aaa42 >>> src/arch/x86/isa_traits.hh fbdaa08aaa42 >>> src/cpu/base_dyn_inst.hh fbdaa08aaa42 >>> src/cpu/o3/dyn_inst.hh fbdaa08aaa42 >>> >>> Diff: http://reviews.gem5.org/r/2766/diff/ >>> >>> >>> Testing >>> ------- >>> >>> >>> Thanks, >>> >>> Andreas Hansson >>> >>> >> >>_______________________________________________ >>gem5-dev mailing list >>[email protected] >>http://m5sim.org/mailman/listinfo/gem5-dev >>_______________________________________________ >>gem5-dev mailing list >>[email protected] >>http://m5sim.org/mailman/listinfo/gem5-dev > > >________________________________ > >-- IMPORTANT NOTICE: The contents of this email and any attachments are >confidential and may also be privileged. If you are not the intended >recipient, please notify the sender immediately and do not disclose the >contents to any other person, use it for any purpose, or store or copy >the information in any medium. Thank you. >_______________________________________________ >gem5-dev mailing list >[email protected] >http://m5sim.org/mailman/listinfo/gem5-dev >_______________________________________________ >gem5-dev mailing list >[email protected] >http://m5sim.org/mailman/listinfo/gem5-dev ________________________________ -- IMPORTANT NOTICE: The contents of this email and any attachments are confidential and may also be privileged. If you are not the intended recipient, please notify the sender immediately and do not disclose the contents to any other person, use it for any purpose, or store or copy the information in any medium. Thank you. _______________________________________________ gem5-dev mailing list [email protected] http://m5sim.org/mailman/listinfo/gem5-dev
