Manual Memory Management in .NET Framework
summary
Shows how to copy and allocate reference objects anywhere by using TypedReference and __makeref/__refto, then getting raw pointers to object headers and fields to place an object on the stack or inside a custom allocator. Demonstrates patching the CLR allocation routine (bump-pointer) to hijack new so new objects land in a user allocator, builds an unsafe packed list that cuts insertion time from ~8–18s to under 3s, and hides trees from the GC to drop collection from ~30s to a few ms using WinDbg+SOS and emitted IL/dynamic methods.
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chapters (8)
- 0:00Introduction to talk
- 1:55Understanding object memory structure
- 9:04Demo 1: Allocating objects on stack
- 24:04Demo 2: Implementing unsafe list
- 30:27Demo 3: Custom memory allocator
- 33:56Hijacking operator new in .NET
- 42:22Demo 4: Improving GC performance
- 45:57Q&A and wrap-up
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