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Revert "Revert frozen RuntimeType objects and write barriers for frozen objects" #76649

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merged 29 commits into from
Oct 6, 2022
Merged

Revert "Revert frozen RuntimeType objects and write barriers for frozen objects" #76649

merged 29 commits into from
Oct 6, 2022

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EgorBo
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@EgorBo EgorBo commented Oct 5, 2022 •
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This PR reverts #76235 with a few manual modifications:

  1. JIT-EE guid is re-generated
  2. gen.bat is invoked (ThunkInput.txt)
  3. Crst are re-generated by the tool, changed lock-level to Unordered

The rest of the changes are automatically reverted.

The main issue why the initial PRs (#75573 and #76135) were reverted has just been resolved via #76251

tldr:
GC could collect some associated (with frozen objects) objects as unreachable, e.g. it could collect a SyncBlock, WeakReferences and Dependent handles associated with frozen objects which could (e.g. for a short period of time) be indeed unreachable but return back to life after.

Unblocks #76112

@ghost ghost assigned EgorBo Oct 5, 2022
@dotnet-issue-labeler dotnet-issue-labeler bot added the area-CodeGen-coreclr CLR JIT compiler in src/coreclr/src/jit and related components such as SuperPMI label Oct 5, 2022
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ghost commented Oct 5, 2022

Tagging subscribers to this area: @JulieLeeMSFT, @jakobbotsch
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Issue Details

This PR reverts #76235 with a few manual modifications:

  1. JIT-EE guid is re-generated
  2. gen.bat is invoked (ThunkInput.txt)
  3. Crst are re-generated by the tool, changed lock-level to Unordered
    The rest of the changes are automatically reverted.

The main issue why the initial PRs (#75573 and #76135) were reverted has just been resolved via #76251

tldr:
GC could collect some associated (with frozen objects) objects as unreachable, e.g. it could collect a SyncBlock, WeakReferences and Dependent handles associated with frozen objects which could (e.g. for a short period of time) be indeed unreachable but return back to life after.

Author: EgorBo
Assignees: EgorBo
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area-CodeGen-coreclr
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EgorBo commented Oct 5, 2022

/azp run runtime-coreclr outerloop, runtime-coreclr gcstress0x3-gcstress0xc

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@EgorBo EgorBo marked this pull request as ready for review October 5, 2022 17:13
jkotas
jkotas reviewed Oct 5, 2022
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jkotas
jkotas approved these changes Oct 6, 2022
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:shipit:

(I have not reviewed the superpmi files.)

@build-analysis build-analysis bot mentioned this pull request Oct 6, 2022
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@EgorBo EgorBo merged commit 23bdaa3 into dotnet:main Oct 6, 2022
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EgorBo commented Oct 6, 2022 •
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SPMI failures are expected (jit-ee guid change)
outerloop/gcstress passed (I assume changes we did for printobject could not brake anything additionally)
Thank you so much for help! 🙂

@EgorBo EgorBo deleted the foh-frozen-types-2 branch October 6, 2022 15:37
This was referenced Oct 13, 2022
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@jkotas jkotas jkotas approved these changes

@jakobbotsch jakobbotsch jakobbotsch approved these changes

@MichalStrehovsky MichalStrehovsky Awaiting requested review from MichalStrehovsky MichalStrehovsky is a code owner

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