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Profiler Breaking Changes.md

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Profiler Breaking Changes

Over time we will need to modify the Profiler APIs, this document will serve as a record of any breaking changes.

  1. Code Versioning introduced changes documented here
  2. The work to allow adding new types and methods after module load means ICorProfilerInfo7::ApplyMetadata will now potentially trigger a GC, and will not be callable in situations where a GC can not happen (for example ICorProfilerCallback::RootReferences).
  3. As part of the work to allow ReJIT on attach ReJITted methods will no longer be inlined (ever). Since the inlining is blocked there won't be a ICorProfilerCallback::JITInlining callback.