[jdk17u-dev] RFR: 8294314: Minimize disabled warnings in hotspot [v2]

[Sergey Bylokhov]

On Fri, 31 Oct 2025 18:36:44 GMT, Sergey Bylokhov <serb at openjdk.org> wrote:

>> Hi all,
>> 
>> This pull request contains a backport of commit [7743345f](https://github.com/openjdk/jdk/commit/7743345f6f73398f280fd18364b4cea10a6b0f2f) from the [openjdk/jdk](https://git.openjdk.org/jdk) repository.
>> 
>> The commit being backported was authored by Magnus Ihse Bursie on 17 Oct 2022 and was reviewed by Erik Joelsson and Aleksey Shipilev.
>> 
>> The patch updates the code to handle certain warnings during compilation. It is part of the ongoing effort to migrate JDK 17 to the new toolchain, including Xcode 16, and will make further patches cleaner.
>> 
>> The patch is not clean because the next three are not in jdk17u:
>>  - https://bugs.openjdk.org/browse/JDK-8286262 -> still need to disable [4996](https://github.com/openjdk/jdk17u-dev/pull/4143/commits/e1b33bcab3a09bcdf16ea6bd740d4ffbf00adaab) warning
>>  - https://bugs.openjdk.org/browse/JDK-8293182 -> still need to disable [missing-field-initializers](https://github.com/openjdk/jdk17u-dev/pull/4143/commits/32855c2267dd796d82893f39e82592dc68fef3c6)
>>  - https://bugs.openjdk.org/browse/JDK-8303805 -> still need to disable [strict-overflow](https://github.com/openjdk/jdk17u-dev/pull/4143/commits/9f8b0126e9c0d3f1a0e83a2fe722f3996c8dcb41)
>> 
>> The next two are are already in jdk17u so context a little bit different:
>>  - https://bugs.openjdk.org/browse/JDK-8300169
>>  - https://bugs.openjdk.org/browse/JDK-8319818
>> 
>> 
>> Testing:
>>  - github actions
>>  - gcc: 7.3.1, 10.5.0, 11.4.0, 11.5.0 and 13.3.0
>>  - xcode: 26, 26.0.1
>>  - VS 2022
>
> Sergey Bylokhov has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Get back "strict-overflow" for ancient gcc

I’m not sure what to do with files that don’t exist in jdk17u yet. For example, if some tests were updated upstream but haven’t been backported, should we exclude them from the current list for now, or add them once they’re backported? (we might forget to do that later.)

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PR Comment: https://git.openjdk.org/jdk17u-dev/pull/4143#issuecomment-3474401072