Fix dump of field ref

[josesimoes]

Description

• Now loading CLR_RT_FieldDef_Index with data from the cross ref. Was using a wrong assembly index.

Motivation and Context

How Has This Been Tested?

• Running MDP unit tests and sample app with implementation of Span<T>.
• Tested against Merge generics support in mscorlib CoreLibrary#245
  [build with MDP buildId 56369]

Screenshots

Types of changes

• Improvement (non-breaking change that improves a feature, code or algorithm)
• Bug fix (non-breaking change which fixes an issue with code or algorithm)
• New feature (non-breaking change which adds functionality to code)
• Breaking change (fix or feature that would cause existing functionality to change)
• Config and build (change in the configuration and build system, has no impact on code or features)
• Dev Containers (changes related with Dev Containers, has no impact on code or features)
• Dependencies/declarations (update dependencies or assembly declarations and changes associated, has no impact on code or features)
• Documentation (changes or updates in the documentation, has no impact on code or features)

Checklist

• My code follows the code style of this project (only if there are changes in source code).
• My changes require an update to the documentation (there are changes that require the docs website to be updated).
• I have updated the documentation accordingly (the changes require an update on the docs in this repo).
• I have read the CONTRIBUTING document.
• I have tested everything locally and all new and existing tests passed (only if there are changes in source code).

Summary by CodeRabbit

• Refactor
  • Improved the internal handling of field reference tokens for enhanced reliability. No changes to user-facing functionality.

[coderabbitai]

Walkthrough

The change updates the assignment of a CLR_RT_FieldDef_Index object within the CLR_RT_Assembly::DumpToken method for TBL_FieldRef tokens. Instead of using the Set method, the code now directly assigns the relevant data to the object's data member. No other logic or control flow is altered.

Changes

File	Change Summary
src/CLR/Diagnostics/Info.cpp	Modified assignment to CLR_RT_FieldDef_Index in DumpToken for TBL_FieldRef tokens, replacing the Set method call with direct data member assignment.

Sequence Diagram(s)

sequenceDiagram
    participant Caller
    participant CLR_RT_Assembly

    Caller->>CLR_RT_Assembly: DumpToken(token)
    activate CLR_RT_Assembly
    CLR_RT_Assembly->>CLR_RT_Assembly: Check token type
    alt token is TBL_FieldRef
        CLR_RT_Assembly->>CLR_RT_Assembly: Assign fd.data = xref.target.data
    else other token types
        CLR_RT_Assembly->>CLR_RT_Assembly: Handle as before
    end
    CLR_RT_Assembly-->>Caller: Return result

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📜 Recent review details

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Review profile: CHILL
Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between d93b7b8 and 5668d20.

📒 Files selected for processing (1)

• src/CLR/Diagnostics/Info.cpp (1 hunks)

🧰 Additional context used

🧠 Learnings (2)

📓 Common learnings

Learnt from: josesimoes
PR: nanoframework/nf-interpreter#3190
File: src/CLR/Core/TypeSystem.cpp:0-0
Timestamp: 2025-06-26T09:16:55.184Z
Learning: In nanoFramework's CLR attribute parsing (src/CLR/Core/TypeSystem.cpp), the sentinel value 0xFFFF in string tokens represents a null string. When encountered, this should result in a true null reference (using SetObjectReference(nullptr)) rather than an empty string instance, and the boxing operation should be skipped via early return.

src/CLR/Diagnostics/Info.cpp (5)

Learnt from: josesimoes
PR: nanoframework/nf-interpreter#3190
File: src/CLR/Core/TypeSystem.cpp:0-0
Timestamp: 2025-06-26T09:16:55.184Z
Learning: In nanoFramework's CLR attribute parsing (src/CLR/Core/TypeSystem.cpp), the sentinel value 0xFFFF in string tokens represents a null string. When encountered, this should result in a true null reference (using SetObjectReference(nullptr)) rather than an empty string instance, and the boxing operation should be skipped via early return.

Learnt from: josesimoes
PR: nanoframework/nf-interpreter#3023
File: targets/netcore/nanoFramework.nanoCLR/nanoCLR_native.cpp:191-225
Timestamp: 2024-09-25T11:28:38.536Z
Learning: In `nanoCLR_GetNativeAssemblyInformation`, there is no need to return the number of bytes written, as the memory buffer is zeroed, making the string buffer terminated.

Learnt from: josesimoes
PR: nanoframework/nf-interpreter#3023
File: targets/netcore/nanoFramework.nanoCLR/nanoCLR_native.cpp:191-225
Timestamp: 2024-10-08T15:52:09.445Z
Learning: In `nanoCLR_GetNativeAssemblyInformation`, there is no need to return the number of bytes written, as the memory buffer is zeroed, making the string buffer terminated.

Learnt from: josesimoes
PR: nanoframework/nf-interpreter#3023
File: targets/netcore/nanoFramework.nanoCLR/nanoCLR_native.cpp:191-225
Timestamp: 2024-10-12T19:00:39.000Z
Learning: When working with `nanoCLR_GetNativeAssemblyInformation`, fixed-size assembly names are required, so code that deals with variable-length names cannot be used.

Learnt from: josesimoes
PR: nanoframework/nf-interpreter#3023
File: targets/netcore/nanoFramework.nanoCLR/nanoCLR_native.cpp:191-225
Timestamp: 2024-09-25T11:28:38.536Z
Learning: When working with `nanoCLR_GetNativeAssemblyInformation`, fixed-size assembly names are required, so code that deals with variable-length names cannot be used.

⏰ Context from checks skipped due to timeout of 90000ms (2)

• GitHub Check: nf-interpreter (Check_Build_Options)
• GitHub Check: nf-interpreter (Nightly build) (Check_Build_Options)

🔇 Additional comments (1)

src/CLR/Diagnostics/Info.cpp (1)

465-465: LGTM! Correctly fixes field reference dumping.

The direct assignment of xref.target.data to fd.data properly uses the cross-reference target data instead of incorrectly combining it with an assembly index. This aligns with the cross-reference lookup pattern used elsewhere in the codebase and addresses the bug described in the PR.

✨ Finishing Touches

• 📝 Generate Docstrings

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[josesimoes]

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