llvm-project

02fa93fc - [Frontend/Offloading] Fix use-after-reallocation in sycl::writeSymbolTable (#197612)

[Frontend/Offloading] Fix use-after-reallocation in sycl::writeSymbolTable (#197612) `writeSymbolTable` took raw pointers into the `SmallString` buffer (`Header`, `Entries`) and then called `Out.append()` / `Out.push_back()` inside the loop to write string data. When the `SmallString` needed to grow, it reallocated, silently invalidating those pointers. All writes through `Entries[I]` after the first reallocation were undefined behaviour; UBSAN caught this as a crash (exit code -6 / SIGABRT) on the sanitizer-x86_64-linux-bootstrap-ubsan builder. The fix pre-computes the total buffer size (header + entry array + all null-terminated name strings) and calls `reserve()` before any pointers are taken, guaranteeing that the subsequent `append` and `push_back` calls cannot trigger a reallocation.