RFR: 8286562: GCC 12 reports some compiler warnings [v4]

[Yasumasa Suenaga]

On Thu, 12 May 2022 01:27:30 GMT, Yasumasa Suenaga <ysuenaga at openjdk.org> wrote:

>> I saw some compiler warnings when I tried to build OpenJDK with GCC 12.0.1 on Fedora 36.
>> As you can see, the warnings spreads several areas. Let me know if I should separate them by area.
>> 
>> * -Wstringop-overflow
>>     * src/hotspot/share/oops/array.hpp
>>     * src/hotspot/share/jfr/recorder/checkpoint/types/traceid/jfrTraceIdBits.inline.hpp
>> 
>> In member function 'void Array<T>::at_put(int, const T&) [with T = unsigned char]',
>>     inlined from 'void ConstantPool::tag_at_put(int, jbyte)' at /home/ysuenaga/github-forked/jdk/src/hotspot/share/oops/constantPool.hpp:126:64,
>>     inlined from 'void ConstantPool::method_at_put(int, int, int)' at /home/ysuenaga/github-forked/jdk/src/hotspot/share/oops/constantPool.hpp:380:15,
>>     inlined from 'ConstantPool* BytecodeConstantPool::create_constant_pool(JavaThread*) const' at /home/ysuenaga/github-forked/jdk/src/hotspot/share/classfile/bytecodeAssembler.cpp:85:26:
>
> Yasumasa Suenaga has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Calculate char offset before realloc()

Thanks for all to review this PR! I think we should separate this issue as following:

* Suppress warnings
    * make/modules/java.desktop/lib/Awt2dLibraries.gmk
    * src/hotspot/share/classfile/bytecodeAssembler.cpp
    * src/hotspot/share/classfile/classFileParser.cpp
    * src/hotspot/share/jfr/recorder/checkpoint/types/traceid/jfrTraceIdBits.inline.hpp
    * src/hotspot/share/opto/memnode.cpp
    * src/hotspot/share/opto/type.cpp
    * src/hotspot/share/utilities/compilerWarnings.hpp
    * src/hotspot/share/utilities/compilerWarnings_gcc.hpp
    * src/java.base/unix/native/libjli/java_md_common.c
* Bug fixes
    * src/java.base/share/native/libjli/java.c
    * src/java.base/share/native/libjli/parse_manifest.c
    * src/jdk.jpackage/linux/native/applauncher/LinuxPackage.c

I want to include the change of Awt2dLibraries.gmk (HarfBuzz) in this PR because it is 3rd party library.

I will separate in above if I do not hear any objections, and this issue (PR) handles "suppress warnings" only.

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PR: https://git.openjdk.java.net/jdk/pull/8646