julia

f59c6dfd - codegen: LLVM 21 ThreadSafeContext and EHFrame compatibility (#61273)

codegen: LLVM 21 ThreadSafeContext and EHFrame compatibility (#61273) ## Summary - Add `withContextDo` compatibility shim for `ThreadSafeContext` API changes in LLVM 21 (which removes `getLock()`, `Lock`, and `getContext()` in favor of callback-based `withContextDo`) - Replace all manual lock/unlock patterns with scoped `withContextDo` callbacks across `jitlayers.h`, `jitlayers.cpp`, `aotcompile.cpp`, and `disasm.cpp` - Add `JLEHFrameRegistrationPlugin` for LLVM 21+ (which removes `jitlink::EHFrameRegistrar`), using JITLink allocation actions for EH frame registration - Debug asserts ensure `get_context()`/`get_module()` are only called inside `withContextDo` scope - Lock hierarchy respected: TSC locks released before `addOutput()`/`R->replace()` which can trigger materialization Supersedes #59946 and #60358, forward-porting those changes to current master. ## Test plan - [x] Builds and passes smoke test on LLVM 20 - [x] Builds and passes smoke test on LLVM 21 (tested with libLLVM 21.1.2 JLL) - [ ] CI This pull request was written with the assistance of generative AI (Claude). 🤖 Generated with [Claude Code](https://claude.com/claude-code) There is quite a few whitespace changes so ignoring it is quite helpful --------- Co-authored-by: yuyichao <yyc1992@gmail.com> Co-authored-by: Sam Schweigel <sam.schweigel@juliahub.com>