Fix object.GetType dataflow edge case#106909
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sbomer merged 3 commits intodotnet:mainfrom Aug 27, 2024
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The equality check needs to determine whether two TypeProxy instances represent the same type. The check was incorrect when two different object instances were allocated to represent the same generic instantiated type. ILCompiler doesn't have this problem because it uses a cache to ensure that the same object instance represents a given instantiated generic type. Discovered while investigating #106215, see more context at #106215 (comment). The new testcase also uncovered an issue in the analyzer that was fixed in #106909.
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Partial fix for one of the cases mentioned in dotnet#106886. This moves some of the tests to ObjectGetTypeDataflow.cs because ObjectGetType.cs is skipped by native AOT. Fixes an issue discovered while investigating dotnet#106215.
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The equality check needs to determine whether two TypeProxy instances represent the same type. The check was incorrect when two different object instances were allocated to represent the same generic instantiated type. ILCompiler doesn't have this problem because it uses a cache to ensure that the same object instance represents a given instantiated generic type. Discovered while investigating dotnet#106215, see more context at dotnet#106215 (comment). The new testcase also uncovered an issue in the analyzer that was fixed in dotnet#106909.
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Partial fix for one of the cases mentioned in #106886.
I moved some of the tests to ObjectGetTypeDataflow.cs because ObjectGetType.cs is skipped by native AOT. Fixes an issue I ran into while investigating #106215.