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JDK-8361363 - ShenandoahAsserts::print_obj() does not work for forwarded objects and UseCompactObjectHeaders
This change fixes Shenandoah’s print_obj() so it correctly prints forwarded objects when compact object headers are enabled, instead of crashing by reading an invalid klass from the forwarding pointer.
Risk is Low as this is a clean backport and the changes are in diagnostic code.
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openjdkbot
changed the title
Backport fe264676337cdef0d7477b0b57ff9d2fe8f9fc0f
8361363: ShenandoahAsserts::print_obj() does not work for forwarded objects and UseCompactObjectHeaders
Nov 21, 2025
This backport pull request has now been updated with issue from the original commit.
openjdkbot
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backport
Port of a pull request already in a different code base
clean
Identical backport; no merge resolution required
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Nov 21, 2025
⚠️@vish-chan This change is now ready for you to apply for maintainer approval. This can be done directly in each associated issue or by using the /approval command.
/approval request for backport of JDK-8361363 which fixes Shenandoah’s print_obj() so it correctly prints forwarded objects when compact object headers are enabled, instead of crashing by reading an invalid klass from the forwarding pointer.
Risk is Low as this is a clean backport and the changes are in diagnostic code.
backportPort of a pull request already in a different code basecleanIdentical backport; no merge resolution requiredrfrPull request is ready for review
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Backport of:
Risk is Low as this is a clean backport and the changes are in diagnostic code.
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gitCheckout this PR locally:
$ git fetch https://git.openjdk.org/jdk25u.git pull/384/head:pull/384$ git checkout pull/384Update a local copy of the PR:
$ git checkout pull/384$ git pull https://git.openjdk.org/jdk25u.git pull/384/headUsing Skara CLI tools
Checkout this PR locally:
$ git pr checkout 384View PR using the GUI difftool:
$ git pr show -t 384Using diff file
Download this PR as a diff file:
https://git.openjdk.org/jdk25u/pull/384.diff
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