RFR: 8286562: GCC 12 reports some compiler warnings [v5]

[Yasumasa Suenaga]

On Tue, 17 May 2022 03:02:55 GMT, Kim Barrett <kbarrett at openjdk.org> wrote:

>> Yasumasa Suenaga has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Revert change for java.c , parse_manifest.c , LinuxPackage.c
>
> src/hotspot/share/jfr/recorder/checkpoint/types/traceid/jfrTraceIdBits.inline.hpp line 103:
> 
>> 101: PRAGMA_STRINGOP_OVERFLOW_IGNORED
>> 102:   *dest = op(bits, *dest);
>> 103: PRAGMA_DIAG_POP
> 
> I see no stringop here.  I'm still trying to understand what the compiler is complaining about.

I guess GCC cannot understand `assert(dest != NULL` immediately preceding it.


In file included from /home/ysuenaga/github-forked/jdk/src/hotspot/share/jfr/recorder/checkpoint/types/traceid/jfrTraceIdLoadBarrier.inline.hpp:33,
                 from /home/ysuenaga/github-forked/jdk/src/hotspot/share/jfr/recorder/checkpoint/types/traceid/jfrTraceId.inline.hpp:30,
                 from /home/ysuenaga/github-forked/jdk/src/hotspot/share/jfr/support/jfrJdkJfrEvent.cpp:30:
In function 'void set_form(jbyte, jbyte*) [with jbyte (* op)(jbyte, jbyte) = traceid_or]',
    inlined from 'void set(jbyte, jbyte*)' at /home/ysuenaga/github-forked/jdk/src/hotspot/share/jfr/recorder/checkpoint/types/traceid/jfrTraceIdBits.inline.hpp:129:23,
    inlined from 'static void JfrTraceIdBits::store(jbyte, const T*) [with T = Klass]' at /home/ysuenaga/github-forked/jdk/src/hotspot/share/jfr/recorder/checkpoint/types/traceid/jfrTraceIdBits.inline.hpp:135:6,
    inlined from 'static void JfrTraceId::tag_as_jdk_jfr_event(const Klass*)' at /home/ysuenaga/github-forked/jdk/src/hotspot/share/jfr/recorder/checkpoint/types/traceid/jfrTraceId.inline.hpp:106:3,
    inlined from 'static void JdkJfrEvent::tag_as(const Klass*)' at /home/ysuenaga/github-forked/jdk/src/hotspot/share/jfr/support/jfrJdkJfrEvent.cpp:176:35:

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