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[release/7.0] Generate diagnosable failfast in GVM resolution - #78936
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If the program hits the conditions in #77070, generate a failfast message that makes it possible to create a workaround. Instead of: ``` Process terminated. Generic virtual method pointer lookup failure. Declaring type handle: MethodTable:0x00007FF66E8587B8 Target type handle: MethodTable:0x00007FF66E858810 Method name: Serialize Instantiation: Argument 00000000: MethodTable:0x00007FF66E85DA08 ``` Generate: ``` Process terminated. Generic virtual method pointer lookup failure. Declaring type handle: EETypeRva:0x005438B8(MemoryPackFormatter2`1[MemPackObject]) Target type handle: EETypeRva:0x00543910(MemoryPackableFormatter2`1[MemPackObject]) Method name: Serialize Instantiation: Argument 00000000: EETypeRva:0x00529B38(System.Buffers.ArrayBufferWriter`1[System.Byte]) ``` The workaround is then: ```xml <Directives> <Application> <Assembly Name="repro"> <Type Name="MemoryPackableFormatter2`1[[MemPackObject]]"> <Method Name="Serialize" Dynamic="Required All"> <GenericArgument Name="System.Buffers.ArrayBufferWriter`1[[System.Byte, mscorlib]],System.Memory" /> </Method> </Type> </Assembly> </Application> </Directives> ```
ghost
commented
Nov 28, 2022
Tagging subscribers to this area: @agocke, @MichalStrehovsky, @jkotas Issue DetailsBackport of #78904 to release/7.0 Customer ImpactTestingRiskIMPORTANT: Is this backport for a servicing release? If so and this change touches code that ships in a NuGet package, please make certain that you have added any necessary package authoring and gotten it explicitly reviewed.
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jkotas
approved these changes
Nov 28, 2022
jeffschwMSFT
approved these changes
Nov 28, 2022
jeffschwMSFT
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approved. we will take for consideration in 7.0.x
carlossanlop
commented
Jan 4, 2023
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Approved by Tactics. |
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Backport of #78904 to release/7.0
/cc @MichalStrehovsky
Customer Impact
This was reported by a customer in #78904
We have a bug where some static generic virtual methods might not be possible to create at runtime. The bug itself is a difficult and risky fix and likely won't meet the bar for 7.0 servicing. But it's possible for users to self-workaround the bug with RD.XML. But the failfast message when the bug is hit doesn't make it easy to construct the RD.XML. This improves the failfast when customer run into the bug. See #78882 (comment) and #78904 for details.
Testing
Manual. This only occurs when we run into the bug.
Risk
Low, this is in a failfast.