[jdk19] RFR: 8288759: GCC 12 fails to compile signature.cpp due to -Wstringop-overread [v2]

[Aleksey Shipilev]

On Mon, 4 Jul 2022 12:12:40 GMT, Aleksey Shipilev <shade at openjdk.org> wrote:

>> Trying to compile with GCC 12.1.1 (current Fedora Rawhide) yields this failure:
>> 
>> 
>> In file included from /home/test/shipilev-jdk/src/hotspot/share/utilities/globalDefinitions_gcc.hpp:35,
>>                  from /home/test/shipilev-jdk/src/hotspot/share/utilities/globalDefinitions.hpp:35,
>>                  from /home/test/shipilev-jdk/src/hotspot/share/memory/allocation.hpp:29,
>>                  from /home/test/shipilev-jdk/src/hotspot/share/classfile/classLoaderData.hpp:28,
>>                  from /home/test/shipilev-jdk/src/hotspot/share/precompiled/precompiled.hpp:34:
>> In function 'const void* memchr(const void*, int, size_t)',
>>     inlined from 'int SignatureStream::scan_type(BasicType)' at /home/test/shipilev-jdk/src/hotspot/share/runtime/signature.cpp:343:32,
>>     inlined from 'void SignatureStream::next()' at /home/test/shipilev-jdk/src/hotspot/share/runtime/signature.cpp:373:19,
>>     inlined from 'void SignatureIterator::do_parameters_on(T*) [with T = Fingerprinter]' at /home/test/shipilev-jdk/src/hotspot/share/runtime/signature.hpp:635:41,
>>     inlined from 'void SignatureIterator::do_parameters_on(T*) [with T = Fingerprinter]' at /home/test/shipilev-jdk/src/hotspot/share/runtime/signature.hpp:629:6,
>>     inlined from 'void Fingerprinter::compute_fingerprint_and_return_type(bool)' at /home/test/shipilev-jdk/src/hotspot/share/runtime/signature.cpp:169:19:
>
> Aleksey Shipilev has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains three additional commits since the last revision:
> 
>  - Better fix the actual warning
>  - Merge branch 'master' into JDK-8288759-gcc12-string-overread
>  - Fix

Closed in favor of https://github.com/openjdk/jdk/pull/9711

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PR: https://git.openjdk.org/jdk19/pull/49