✨ Feature: LLVM exception unwinding via setjmp - #54
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Added support for try/catch exception unwinding in the LLVM backend. A pragmatic `setjmp`/`longjmp` FFI approach is utilized in the native runtime instead of DWARF personality functions to quickly restore stack frame states. - Created `JmpBuf` for thread-local unwinding state. - Generated correct branching logic within the `Op::Try` IR codegen and exception fallback mappings. - Cleaned up allocated buffer handles using `ts_try_free`. - Updated test cases to reflect success. Co-authored-by: Tcode-Motion <188012755+Tcode-Motion@users.noreply.github.com>
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✨ What (the implementation):
Implemented try/catch and throw semantics for LLVM native code compilation inside
compiler/llvm_backend/src/codegen.rsmapping to theruntime/native_runtimeinfrastructure.🎯 Why (the problem solved):
TerminatorKind::ThrowandOp::Trywere left as stubs that simply evaluated asLLVMBuildUnreachableor skipped entirely when natively compiling TechScript projects, causing unexpected aborts and lack of exception handling.🔬 Execution details:
JmpBufopaque struct inruntime/native_runtimeto map FFIsetjmp/longjmp.ts_try_push,ts_try_pop,ts_throw,ts_get_exception).Op::Try, split the basic block to add the conditional exception jump viasetjmpcheck with correct memory cleanup viats_try_free._setjmparity (2 params) and linked the LLVMreturns_twiceattribute tosetjmpto prevent miscompilations.PR created automatically by Jules for task 18129513131942921509 started by @Tcode-Motion