I propose to ship with llvm-symbolizer for MKLLVM=yes. llvm-symbolizer is an addr2line replacement from LLVM. Rationale: - llvm-symbolizer integrates well with LLVM sanitizers and gives better results that addr2line. - basesystem llvm-symbolizer is necessary in MKLLVM=yes MKSANITIZER / MKLIBCSANITIZER environment as otherwise backtraces are useless. - A workaround to basesystem's llvm-symbolizer is installing an external one into $PATH, but this requires manual build of statically linked llvm-symbolizer (generally upstream LLVM does not support well static builds). - Shipping llvm-symbolizer by default makes everything easy and functional out of the box. llvm-symbolizer needs building of 4 additional libraries: - libLLVMDebugInfoPDB - libLLVMDebugInfoPDBNative - libLLVMDebugInfoSymbolize - libLLVMObjectYAML Once the LLDB branch will be merged into src/, the same LLVM libraries are needed for LLDB. http://netbsd.org/~kamil/patch-00260-install-llvm-symbolizer.txt This addition is intended to be used during GSoC 2020 for the rumpkernel fuzzing projects.
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