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8330647: Two CDS tests fail with -UseCompressedOops and UseSerialGC/UseParallelGC #19274

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@calvinccheung calvinccheung commented May 16, 2024 •
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The following two tests contain @requires vm.cds.write.archived.java.heap which implies UseG1GC && UseCompressedClassPointers

cds/appcds/cacheObject/ArchiveHeapTestClass.java
cds/serviceability/ReplaceCriticalClassesForSubgraphs.java

The tests would fail if options conflicting with vm.cds.write.archived.java.heap are specified via the -Dtest.cds.runtime.options property because the options would be added after the @require check.

A fix is to check if the -Dtest.cds.runtime.options property contains non-null value and throws a SkippedException.

Update:
The checking of the -Dtest.cds.runtime.options property is now performed in VMProps.java.

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  • JDK-8330647: Two CDS tests fail with -UseCompressedOops and UseSerialGC/UseParallelGC (Bug - P4)

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👋 Welcome back ccheung! A progress list of the required criteria for merging this PR into master will be added to the body of your pull request. There are additional pull request commands available for use with this pull request.

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openjdk bot commented May 16, 2024 •
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@calvinccheung This change now passes all automated pre-integration checks.

ℹ️ This project also has non-automated pre-integration requirements. Please see the file CONTRIBUTING.md for details.

After integration, the commit message for the final commit will be:

8330647: Two CDS tests fail with -UseCompressedOops and UseSerialGC/UseParallelGC

Reviewed-by: dholmes, iklam

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At the time when this comment was updated there had been 160 new commits pushed to the master branch:

  • 0a9d1f8: 8332749: Broken link in MemorySegment.Scope.html
  • c9a7b97: 8332829: [BACKOUT] C2: crash in compiled code because of dependency on removed range check CastIIs
  • 7fd9d6c: 8332340: Add JavacBench as a test case for CDS
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@calvinccheung The following label will be automatically applied to this pull request:

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@openjdk openjdk bot added the hotspot-runtime hotspot-runtime-dev@openjdk.org label May 16, 2024
@calvinccheung calvinccheung marked this pull request as ready for review May 16, 2024 22:03
@openjdk openjdk bot added the rfr Pull request is ready for review label May 16, 2024
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dholmes-ora
dholmes-ora reviewed May 17, 2024
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Can't the code that implements the @requires check also check for that property?

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calvinccheung commented May 17, 2024 •
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Can't the code that implements the @requires check also check for that property?

Yes, I've reverted the changes in the tests and added the checking of the test.cds.runtime.options property in VMProps.java.
Also, instead of just checking for null value, it checks for if any of the options is not compatible with writing Java heap objects into the CDS archive.

dholmes-ora
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Update looks good. One query below. Thanks

iklam
iklam approved these changes May 21, 2024
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LGTM.

@openjdk openjdk bot added the ready Pull request is ready to be integrated label May 21, 2024
turbanoff
turbanoff reviewed May 21, 2024
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dholmes-ora
dholmes-ora reviewed May 22, 2024
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test/jtreg-ext/requires/VMProps.java
Comment on lines 479 to 484
for (String opt : jtropts.split(",")) {
if (opt.equals(CCP_DISABLED))
return false;
if (opt.startsWith(GC_PREFIX) && opt.endsWith(GC_SUFFIX) &&
!opt.equals(G1GC_ENABLED))
return false;
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Based on the bug report both of these conditions are needed to be enabled for there to be a problem, but you exclude based on either -XX:-UseCompressedClassPointers" or any non-G1 GC. ??

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I've checked again, without the fix, the test fails if running with either -Dtest.cds.runtime.options=-XX:-UseCompressedClassPointers or any non-G1GC such as -Dtest.cds.runtime.options=-XX:+UseZGC.

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stefank suggested changes May 22, 2024
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This is not a review of the functional changes of this fix, but since this patch does change the shared VMProps.java file I have some style requests.

test/jtreg-ext/requires/VMProps.java
* @return true if the VM options specified via the "test.cds.runtime.options"
* property is compatible with writing Java heap objects into the CDS archive
*/
protected boolean isCDSRuntimeOptionsCompatible() {
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Please add braces for all the added if statements.

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Fixed.

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You missed this one:

        if (jtropts == null)
            return true;

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Fixed.

stefank
stefank suggested changes May 23, 2024
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test/jtreg-ext/requires/VMProps.java
* @return true if the VM options specified via the "test.cds.runtime.options"
* property is compatible with writing Java heap objects into the CDS archive
*/
protected boolean isCDSRuntimeOptionsCompatible() {
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You missed this one:

        if (jtropts == null)
            return true;

dholmes-ora
dholmes-ora approved these changes May 23, 2024
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Okay that seems fine if either condition disables writing into the CDS archive.

Thanks

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Thanks @iklam @dholmes-ora @stefank @turbanoff for the review.

/integrate

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openjdk bot commented May 24, 2024

Going to push as commit c2cca2a.
Since your change was applied there have been 176 commits pushed to the master branch:

  • 6d2aeb8: 8332745: Method::is_vanilla_constructor is never used
  • cfdc64f: 8331291: java.lang.classfile.Attributes class performs a lot of static initializations
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  • 239c1b3: 8332807: Parallel: Make some APIs in ParMarkBitMap private
  • 9b61a76: 8332615: RISC-V: Support vector unsigned comparison instructions for machines with RVV
  • a71b404: 8331398: G1: G1HeapRegionPrinter reclamation events should print the original region type
  • ... and 166 more: https://git.openjdk.org/jdk/compare/a643d6c7ac8a7bc0d3a288c1ef3f07876cf70590...master

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@calvinccheung Pushed as commit c2cca2a.

💡 You may see a message that your pull request was closed with unmerged commits. This can be safely ignored.

@calvinccheung calvinccheung deleted the 8330647-CDS-test-fail-ParallelGC branch May 24, 2024 16:13
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@stefank stefank stefank requested changes

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@dholmes-ora dholmes-ora dholmes-ora approved these changes

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