Fix issue #114504 by not emitting empty gcrefmaps in R2R#118594
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kg merged 6 commits intodotnet:mainfrom Aug 12, 2025
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Fix issue #114504 by not emitting empty gcrefmaps in R2R#118594kg merged 6 commits intodotnet:mainfrom
kg merged 6 commits intodotnet:mainfrom
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…is was causing R2Rdump to explode)
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/azp run runtime-coreclr crossgen2 outerloop |
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Pull Request Overview
This PR fixes issue #114504 by preventing empty GC reference maps from being emitted in Ready-to-Run (R2R) images. The fix avoids generating RVAs for empty gcrefmaps which were causing r2rdump to fail when reading them due to missing size headers.
- Adds an
IsEmptyproperty toGCRefMapNodeto check if the map contains methods - Modifies
ImportSectionNodeto only emit gcrefmap RVAs when the map is not empty - Re-enables optimization flag
-Oin CrossGen2 targets that was previously disabled due to this issue
Reviewed Changes
Copilot reviewed 3 out of 3 changed files in this pull request and generated 1 comment.
| File | Description |
|---|---|
src/coreclr/tools/aot/ILCompiler.ReadyToRun/Compiler/DependencyAnalysis/ReadyToRun/GCRefMapNode.cs |
Adds IsEmpty property to check if GC reference map contains any methods |
src/coreclr/tools/aot/ILCompiler.ReadyToRun/Compiler/DependencyAnalysis/ReadyToRun/ImportSectionNode.cs |
Removes field and parameter tracking, uses null-conditional operators, and only emits gcrefmap RVAs for non-empty maps |
src/tests/Common/CLRTest.CrossGen.targets |
Re-enables the -O optimization flag that was previously commented out |
.../tools/aot/ILCompiler.ReadyToRun/Compiler/DependencyAnalysis/ReadyToRun/ImportSectionNode.cs
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Should fix #114504
cc @davidwrighton