RFR: 8365487: [asan] some oops (mode) related tests fail

[Kim Barrett]

On Wed, 13 Aug 2025 13:23:45 GMT, Matthias Baesken <mbaesken at openjdk.org> wrote:

> When running with asan - enabled binaries, some oops related tests fail.
> This seems to be related to (small) changes in memory layout caused by asan.
> examples :
> runtime/CompressedOops/UseCompressedOops.java
> 
> 
> java.lang.RuntimeException: 'Zero based' missing from stdout/stderr
>                at jdk.test.lib.process.OutputAnalyzer.shouldContain(OutputAnalyzer.java:253)
>                at UseCompressedOops.testCompressedOopsModes(UseCompressedOops.java:98)
>                at UseCompressedOops.testCompressedOopsModesGCs(UseCompressedOops.java:59)
>                at UseCompressedOops.main(UseCompressedOops.java:48)
>                at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:104)
>                at java.base/java.lang.reflect.Method.invoke(Method.java:565)
>                at com.sun.javatest.regtest.agent.MainWrapper$MainTask.run(MainWrapper.java:138)
>                at java.base/java.lang.Thread.run(Thread.java:1474)
> 
> 
> 
> 
> jdk/jfr/event/gc/configuration/TestGCHeapConfigurationEventWith32BitOops.java
> 
> 
> Error: Value not equal to 32-bit, field='compressedOopsMode', value='Non-zero based' expected: Non-zero based but was: 32-bit
> Failed event:
> jdk.GCHeapConfiguration {
>   startTime = 13:13:02.886 (2025-08-09)
>   minSize = 100.0 MB
>   maxSize = 100.0 MB
>   initialSize = 100.0 MB
>   usesCompressedOops = true
>   compressedOopsMode = "Non-zero based"
>   objectAlignment = 8 bytes
>   heapAddressBits = 32
> }
> 
> ----------System.err:(20/1718)----------
> java.lang.RuntimeException: Value not equal to 32-bit, field='compressedOopsMode', value='Non-zero based' expected: Non-zero based but was: 32-bit
>                at jdk.test.lib.Asserts.fail(Asserts.java:715)
>                at jdk.test.lib.Asserts.assertEquals(Asserts.java:208)
>                at jdk.test.lib.jfr.EventField.lambda$equal$0(EventField.java:50)
>                at jdk.test.lib.jfr.EventField.doAssert(EventField.java:114)
>                at jdk.test.lib.jfr.EventField.equal(EventField.java:50)
>                at jdk.test.lib.jfr.EventVerifier.verifyEquals(EventVerifier.java:35)
>                at jdk.jfr.event.gc.configuration.GCHeapConfigurationEventVerifier.verifyCompressedOopModeIs(GCHeapConfigurationEventVerifier.java:59)
>                at jdk.jfr.event.gc.configuration.ThirtyTwoBitsVerifier.verify(TestGCHeapConfigurationEventWith32BitOops.java:74)
>                at jdk.jfr.event.gc.configuration.GCHeapConfigurationEventTester.run(GCHeapConfigurationEventTester.java:46)
>          ...

Other than the comment consistency suggestion, this looks good.

test/hotspot/jtreg/runtime/CompressedOops/UseCompressedOops.java line 33:

> 31:  *          java.management
> 32:  * @build jdk.test.whitebox.WhiteBox
> 33:  * @comment Do not run with asan enabled, because it changes memory layout and we get a different coops mode

Consider making this comment consistent with the others in this change?

-------------

Marked as reviewed by kbarrett (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/26760#pullrequestreview-3119239876
PR Review Comment: https://git.openjdk.org/jdk/pull/26760#discussion_r2275652323