DataContractSerialization doesn't work with TrimMode - link #42824
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DataContractSerialization has some Reflection "shim" methods that the ILLinker can't see through. This causes critical methods to be trimmed and applications to fail. These methods were put in place in .NET Core 1.0 when the full Reflection API wasn't available. The fix is to remove these "shim" Reflection APIs and use Reflection directly. Fix dotnet#41525 Fix dotnet#42754
eerhardt
requested review from
HongGit,
MichalStrehovsky,
StephenMolloy,
marek-safar and
vitek-karas
eerhardt
commented
Sep 28, 2020
src/libraries/System.Runtime.Serialization.Xml/tests/TrimmingTests/EndToEndTest.cs
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jkotas
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Sep 29, 2020
| if (s_objectEquals == null) | ||
| { | ||
| s_objectEquals = Globals.TypeOfObject.GetMethod("Equals", BindingFlags.Public | BindingFlags.Static); | ||
| s_objectEquals = typeof(object).GetMethod("Equals", BindingFlags.Public | BindingFlags.Static); |
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It would be nice to delete Globals.TypeOfObject and all other typeof caches from the Globals type.
jkotas
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Sep 29, 2020
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@HongGit @StephenMolloy @mconnew - thoughts on this? I'd like to propose this to be backported to 5.0 since it blocks any usage of DataContractSerializer in trimmed applications like Blazor WASM. |
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Started backporting to release/5.0-rc2: https://github.com/dotnet/runtime/actions/runs/280964515 |
mconnew
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Sep 30, 2020
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@eerhardt I'm seeing failures building master across the board from this PR. There's a number of trim analysis warnings due to this PR. |
eerhardt
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Sep 30, 2020
Changes dotnet#40691 and dotnet#42824 conflicted. One added a new ILLink suppress warnings file, while the other added more warnings. This causes the build to break. The fix is to regenerate the suppressions file with the latest code. Fix dotnet#42926
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DataContractSerialization has some Reflection "shim" methods that the ILLinker can't see through. This causes critical methods to be trimmed and applications to fail. These methods were put in place in .NET Core 1.0 when the full Reflection API wasn't available.
The fix is to remove these "shim" Reflection APIs and use Reflection directly.
Fix #41525
Fix #42754