[cDAC] Remaining GC data APIs

[max-charlamb]

APIs Implemented

• GetHeapAnalyzeData
  • server
• GetHeapAnalyzeStaticData
  • server
  • [DAC] Properly dereference internal_root_array #119396
• GetHeapSegmentData
  • server
• GetOOMData
  • server
• GetOOMStaticData
  • workstation
• GetGCInterestingInfoData
  • server
  • [DAC] fix dac_gc_heap marshalling #119393
• GetGCInterestingInfoStaticData
  • workstation
• GetGCGlobalMechanisms
  • workstation
• GetGCDynamicAdaptationMode -> works when !datas
  • server

Test run against new runtime-diagnostic tests: https://dev.azure.com/dnceng-public/public/_build/results?buildId=1144229&view=results

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[Copilot]

Pull Request Overview

This PR implements the remaining GC data APIs for the cDAC (compact Data Access Component) system, completing the transition from legacy DAC implementations. The changes focus on providing structured access to garbage collector internal data including heap analysis, segment information, out-of-memory data, and global GC mechanisms.

Key changes implemented:

• Implementation of heap analysis APIs (GetHeapAnalyzeData, GetHeapAnalyzeStaticData)
• Addition of heap segment data access (GetHeapSegmentData)
• Out-of-memory data retrieval APIs (GetOOMData, GetOOMStaticData)
• GC interesting info and global mechanisms APIs
• Dynamic adaptation mode support

Reviewed Changes

Copilot reviewed 14 out of 15 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
SOSDacImpl.cs	Implements concrete API methods replacing legacy delegations with cDAC implementations
ISOSDacInterface.cs	Updates interface definitions with strongly-typed parameters and adds new data structures
OOMHistory.cs	New data structure for out-of-memory history tracking
HeapSegment.cs	New data structure for heap segment information
GCHeapSVR.cs	Enhanced server GC heap data structure with additional fields for analysis
IGCHeap.cs	New interface defining common GC heap operations
GC_1.cs	Core GC contract implementation with new data retrieval methods
GCHeapWKS.cs	New workstation GC heap implementation
Constants.cs	Added global constants for new GC data arrays and mechanisms
DataType.cs	Added new data types for heap segments and OOM history
IGC.cs	Extended interface with new API signatures and data structures
datadescriptor.inc	Added C++ data descriptors for new heap segment and OOM history types
datadescriptor.h	Added field mappings for GC heap analysis and interesting data
GC.md	Updated documentation with new API signatures and data structures

[noahfalk]

LGTM

[noahfalk]

fyi @Maoni0

[Maoni0]

CC @mangod9