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From: "zeccav at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libfortran/81986] sanitizer detects negation of large number in string.c
Date: Sat, 27 Feb 2021 09:21:58 +0000 [thread overview]
Message-ID: <bug-81986-4-5ajg1SUHi4@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-81986-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81986
Vittorio Zecca <zeccav at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Component|sanitizer |libfortran
--- Comment #4 from Vittorio Zecca <zeccav at gmail dot com> ---
On current trunk with sanitized libgfortran.so.5 I get
gfortran gfbug142.f
ldd ./a.out
........
libgfortran.so.5 =>
/home/vitti/gcc-150221-undefined/x86_64-pc-linux-gnu/libgfortran/.libs/libgfortran.so.5
(0x000014a739133000)
libubsan.so.1 =>
/home/vitti/local/gcc-150221-undefined/lib/../lib64/libubsan.so.1
(0x000014a738293000)
libstdc++.so.6 =>
/home/vitti/local/gcc-150221-undefined/lib/../lib64/libstdc++.so.6
................
./a.out
../../../gcc-150221/libgfortran/io/write.c:835:7: runtime error: negation of
0x80000000000000000000000000000000 cannot be represented in type '__int128';
cast to an unsigned type to negate this value to itself
../../../gcc-150221/libgfortran/runtime/string.c:199:11: runtime error:
negation of 0x80000000000000000000000000000000 cannot be represented in type
'__int128'; cast to an unsigned type to negate this value to itself
80000000000000000000000000000000
next parent reply other threads:[~2021-02-27 9:21 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <bug-81986-4@http.gcc.gnu.org/bugzilla/>
2021-02-27 9:21 ` zeccav at gmail dot com [this message]
2021-02-28 11:04 ` dominiq at lps dot ens.fr
2021-03-03 7:08 ` cvs-commit at gcc dot gnu.org
2021-03-03 11:03 ` dominiq at lps dot ens.fr
2021-12-25 13:04 ` fxcoudert at gcc dot gnu.org
2021-12-25 14:57 ` fxcoudert at gcc dot gnu.org
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