RFR: 8288759: GCC 12 fails to compile signature.cpp due to -Wstringop-overread bug

[Aleksey Shipilev]

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:

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Commit messages:
 - Fix

Changes: https://git.openjdk.org/jdk19/pull/49/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk19&pr=49&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8288759
  Stats: 25 lines in 3 files changed: 19 ins; 6 del; 0 mod
  Patch: https://git.openjdk.org/jdk19/pull/49.diff
  Fetch: git fetch https://git.openjdk.org/jdk19 pull/49/head:pull/49

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