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Implement remaining ILGenertorImpl methods, excluding scope. Add max stack calculation for branching. #96362

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merged 5 commits into from Jan 2, 2024

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buyaa-n
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@buyaa-n buyaa-n commented Dec 29, 2023

  • Adding implementations for Emit(OpCode opcode, SignatureHelper signature), EmitCalli(OpCode opcode, CallingConvention unmanagedCallConv, Type? returnType, Type[]? parameterTypes) and EmitCalli(OpCode opcode, CallingConventions callingConvention, Type? returnType, Type[]? parameterTypes, Type[]? optionalParameterTypes)
  • Refactored member reference logic completely to cover method+optionalParameters reference scenario, also refactored/fixed all ModuleBuilder.Get***MetadataToken implementations as needed
  • No-op (instead of throwing NotImplementedException) for BeginScope(), EndScope() and UsingNamespace(string usingNamespace), their implementations will be added with PDB support.
  • Refactored max stack calculation to account forward and backward branching (followed the runtime approach and imported tests), switch casing etc and test
  • Fixed the bug that was causing BadImageFormatException when loading generated assemblies with Assembly.LoadFrom(path) for run. Some tests now run the loaded assembly.

Contributes to #92975

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ghost commented Dec 29, 2023

Tagging subscribers to this area: @dotnet/area-system-reflection-emit
See info in area-owners.md if you want to be subscribed.

Issue Details
  • Adding implementations for Emit(OpCode opcode, SignatureHelper signature), EmitCalli(OpCode opcode, CallingConvention unmanagedCallConv, Type? returnType, Type[]? parameterTypes) and EmitCalli(OpCode opcode, CallingConventions callingConvention, Type? returnType, Type[]? parameterTypes, Type[]? optionalParameterTypes)
  • Refactored member reference logic completely to cover method+optionalParameters reference scenario, also refactored/fixed all ModuleBuilder.Get***MetadataToken implementations as needed
  • No-op (instead of throwing NotImplementedException) for BeginScope(), EndScope() and UsingNamespace(string usingNamespace), their implementations will be added with PDB support.
  • Refactored max stack calculation to account forward and backward branching, switch casing etc and test
  • Fixed the bug that was causing BadImageFormatException when loading generated assemblies with Assembly.LoadFrom(path) for run. Some tests no run the loaded assembly.

Contributes to #92975

Author: buyaa-n
Assignees: -
Labels:

area-System.Reflection.Emit

Milestone: -

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LGTM; minor comments \ questions, Although there is a test failure related to this PR.

public override void UsingNamespace(string usingNamespace) => throw new NotImplementedException();
public override void UsingNamespace(string usingNamespace)
{
// TODO: No-op, will be implemented wit PDB support
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Why not throw NIE?

ilg.Emit(OpCodes.Ldarg_0);
ilg.Emit(OpCodes.Brfalse, lab);

// The label is marked with a larger stack depth, one. This IL is invalid.
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So we don't detect \ throw on these cases, and CreateTypeInfo() doesn't either?

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These tests are imported from runtime ILGenerator tests

// The label is marked with a larger stack depth, one. This IL is invalid.
ilg.Emit(OpCodes.Ldc_I4_1);

Personally, I am not sure this exact test makes sense, though runtime doesn't detect or throw ...

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Note the test error: AssemblySaveILGeneratorTests.SimpleForLoopTest has failed.

@buyaa-n buyaa-n merged commit 93caf8d into dotnet:main Jan 2, 2024
170 of 176 checks passed
@buyaa-n buyaa-n deleted the emit_calli branch January 2, 2024 17:26
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3 participants