RFR: JDK-8312525: New test runtime/os/TestTrimNative.java#trimNative is failing: did not see the expected RSS reduction

[Thomas Stuefe]

On Wed, 26 Jul 2023 05:59:20 GMT, David Holmes <dholmes at openjdk.org> wrote:

>> The test causes intermittent rare errors, so far only seen on Oracle 7.9 with glibc 2.17.  
>> 
>> This PR disables, for automated testing, the RSS evaluation part of the test. It retains the mechanical part (testing whether trims happen at all, in the expected number). The stricter variant of the test is kept as manual tests (usable with jtreg without -a).
>
> src/hotspot/os/linux/os_linux.cpp line 4649:
> 
>> 4647: 
>> 4648:   // Log also:
>> 4649:   // - LD_PRELOAD, since this is the most popular mechanism to divert libc functions
> 
> What about the content of /etc/ld.so.preload? (We show that in hs_err file.)

Oh, you are right. I'll check how much more lines that would add; I don't want to bloat the complexity too much.

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PR Review Comment: https://git.openjdk.org/jdk/pull/14984#discussion_r1274441324