[9] RFR(S) 8171187: Expected compilation level after compilation to be no less than 1

Igor Veresov igor.veresov at oracle.com
Wed Dec 14 01:52:08 UTC 2016

Looks good.


> On Dec 13, 2016, at 5:22 PM, Vladimir Kozlov <vladimir.kozlov at oracle.com> wrote:
> http://cr.openjdk.java.net/~kvn/8171187/webrev/
> https://bugs.openjdk.java.net/browse/JDK-8171187
> compiler/aot/RecompilationTest.java fails with
> java.lang.RuntimeException: METHOD_TEST: expected compilation level after compilation to be no less than 1 for METHOD_TEST: expected -1 >= 1
> The AOT method SimpleTestCaseHelper.method() is not recompiled sometimes.
> The main cause is that this method is very trivial ( int method() { return 42; } )
> and it is inlined into other AOT methods which are executed during run.
> An other cause it profiling event is triggered using 'rdtsc; test $0xff,%eax;' instructions. Which may not jump during 256 invocations.
> These changes only fix inlining issue by adding -XX:CompileCommand=dontinline flag to AOT compilation commands.
> I added missing -UseCompressedOops flags which I did not add in JDK-8171134 fix.
> I added suffix to AOT libraries names to keep both in case of debugging.
> And I replaced -XX:CompileCommand=dontinline,*.* with -XX:-Inline for java execution commands. I verified that test methods are not inlined during recompilation.
> Thanks,
> Vladimir

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