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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/114757] stringop-overflow warning with
 -fsanitize=address while building JDK
Date: Wed, 17 Apr 2024 20:14:25 +0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: changed
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X-Bugzilla-Product: gcc
X-Bugzilla-Component: tree-optimization
X-Bugzilla-Version: 13.2.1
X-Bugzilla-Keywords: diagnostic
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X-Bugzilla-Who: pinskia at gcc dot gnu.org
X-Bugzilla-Status: WAITING
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D114757

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
          Component|other                       |tree-optimization
             Blocks|                            |88443
   Last reconfirmed|                            |2024-04-17
     Ever confirmed|0                           |1
           Keywords|                            |diagnostic
            Summary|[ASAN] ASAN miscalculates   |stringop-overflow warning
                   |size of region when         |with -fsanitize=3Daddress
                   |building the JDK            |while building JDK
             Status|UNCONFIRMED                 |WAITING

--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Note the documentation has the following warning about warnings and sanitiz=
ers:
```
Note that sanitizers tend to increase the rate of false positive warnings, =
most
notably those around -Wmaybe-uninitialized. We recommend against combining
-Werror and [the use of] sanitizers.
```


https://gcc.gnu.org/onlinedocs/gcc-13.2.0/gcc/Instrumentation-Options.html#=
index-fsanitize_003daddress

Can you attach the preprocessed source as requested by
https://gcc.gnu.org/bugs/ ? And the exact options which are being used to
invoke gcc?


Referenced Bugs:

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D88443
[Bug 88443] [meta-bug] bogus/missing -Wstringop-overflow warnings=