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From: "avieira at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libgcc/107678] New: [13 Regression] Segfault in
 aarch64_fallback_frame_state
Date: Mon, 14 Nov 2022 17:17:07 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D107678

            Bug ID: 107678
           Summary: [13 Regression] Segfault in
                    aarch64_fallback_frame_state
           Product: gcc
           Version: 13.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: libgcc
          Assignee: unassigned at gcc dot gnu.org
          Reporter: avieira at gcc dot gnu.org
  Target Milestone: ---

Hi,

We ran into a segfault when running SPEC 2017 Parest for aarch64-none-linux=
-gnu
on a Neoverse V1 target after g:146e45914032

These are the relevant frames of the segfault:
#0  0x0000ffff8bd2dd04 in aarch64_fallback_frame_state (context=3D0xffffe11=
f6e10,
fs=3D0xffffe11f71d0)
    at ./md-unwind-support.h:74
#1  uw_frame_state_for (context=3Dcontext@entry=3D0xffffe11f6e10,
fs=3Dfs@entry=3D0xffffe11f71d0)
    at .../libgcc/unwind-dw2.c:1275
#2  0x0000ffff8bd2f0ec in _Unwind_RaiseException (exc=3D0x36b105d0)
    at .../libgcc/unwind.inc:104
#3  0x0000ffff8be8d6b4 in __cxxabiv1::__cxa_throw (obj=3D<optimized out>,
    tinfo=3D0x56bf58 <typeinfo for dealii::SolverControl::NoConvergence>,
    dest=3D0x468c00 <dealii::SolverControl::NoConvergence::~NoConvergence()
[clone .lto_priv.0]>)
    at .../libstdc++-v3/libsupc++/eh_throw.cc:93

We do not see the same failure for a NEON only run, so the size of the vect=
ors
could be a hint? But I haven't confirmed this.=