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From: "zhroma at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug sanitizer/94191] New: ubsan bootstrap memory hog with
 -enable-checking=rtl
Date: Mon, 16 Mar 2020 09:50:06 +0000
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X-Bugzilla-Product: gcc
X-Bugzilla-Component: sanitizer
X-Bugzilla-Version: 9.3.0
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X-Bugzilla-Severity: normal
X-Bugzilla-Who: zhroma at gcc dot gnu.org
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X-Bugzilla-Priority: P3
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D94191

            Bug ID: 94191
           Summary: ubsan bootstrap memory hog with -enable-checking=3Drtl
           Product: gcc
           Version: 9.3.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: sanitizer
          Assignee: unassigned at gcc dot gnu.org
          Reporter: zhroma at gcc dot gnu.org
                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, marxi=
n at gcc dot gnu.org
  Target Milestone: ---

On 64Gb RAM x86_64 box using 9.3 sources and running:
<src>/configure --enable-languages=3Dc,c++ --with-build-config=3Dbootstrap-=
ubsan
--enable-checking=3Drtl;  make

During stage2 insn-extract.c compilation was stopped by OOM killer.  It rea=
lly
wants 60+ Gb of memory.

--
Yeah, it's a bit crazy checking options and not sure we have to bother about
it.=