shenhan added a comment. In D85408#2253055 <https://reviews.llvm.org/D85408#2253055>, @MaskRay wrote:
> I am still reading the patch, but I have noticed one thing worth discussing. > `.bb_addr_map` is a non-SHF_ALLOC section (meaning that it is not part of the > memory image). An absolute relocation type (`.quad .Lfunc_begin0`) works but > the value is a link-time address, not taking account of the load base > (PIE/shared object)). (If .bb_addr_map has the SHF_ALLOC flag, linkers will > report a text relocation) How do you intend to use `.bb_addr_map` at runtime? Regarding "not taking account of the load base (PIE/shared object)" - the profile conversion tool uses addresses in .bb_addr_map section and MMAP entries in perf.data file to construct runtime addresses, so these runtime addresses can be matched with the profile addresses recorded in perf.data file. Repository: rG LLVM Github Monorepo CHANGES SINCE LAST ACTION https://reviews.llvm.org/D85408/new/ https://reviews.llvm.org/D85408 _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
