[Bug c/61900] New: loc_descr_plus_const sanitizer runtime error in xgcc while building libgcc_s

[Bug c/61900] New: loc_descr_plus_const sanitizer runtime error in xgcc while building libgcc_s

[zeccav at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61900

            Bug ID: 61900
           Summary: loc_descr_plus_const sanitizer runtime error in xgcc
                    while building libgcc_s
           Product: gcc
           Version: 4.9.1
            Status: UNCONFIRMED
          Severity: minor
          Priority: P3
         Component: c
          Assignee: unassigned at gcc dot gnu.org
          Reporter: zeccav at gmail dot com

While building gcc/libgcc_s and using -fsanitize=undefined a runtime error is
detected in dwarf2out.c:1488:53
"loc->dw_loc_next = int_loc_descriptor (-offset);"
because offset==LONG_MIN
This is on x86-64.
The sanitizer exact message is
"../../gcc-4.9.1/gcc/dwarf2out.c:1488:53: runtime error: 
negation of -9223372036854775808 cannot be represented in type 'long int'; 
cast to an unsigned type to negate this value to itself"

This is in xgcc compiling bid128_add.c/bid128_to_int32.c/bid128_to_uint32.c
bid128_to_int64.c/bid128_to_uint64.c

[Bug debug/61900] loc_descr_plus_const sanitizer runtime error in xgcc while building libgcc_s

[mpolacek at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61900

Marek Polacek <mpolacek at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |mpolacek at gcc dot gnu.org

--- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
I don't see this with trunk.

[Bug debug/61900] loc_descr_plus_const sanitizer runtime error in xgcc while building libgcc_s

[zeccav at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61900

--- Comment #2 from Vittorio Zecca <zeccav at gmail dot com> ---
This happens when I build gcc itself with option -fsanitize=undefined,
at build time, in directory x86_64-unknown-linux-gnu/32/libgcc.

[Bug debug/61900] loc_descr_plus_const sanitizer runtime error in xgcc while building libgcc_s

[zeccav at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61900

Vittorio Zecca <zeccav at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|---                         |FIXED
             Status|UNCONFIRMED                 |RESOLVED

--- Comment #3 from Vittorio Zecca <zeccav at gmail dot com> ---
Fixed.