121     auto frame = &unwinder_frames[i];  in Unwind()  local
127     back_frame->rel_pc = frame->rel_pc;  in Unwind()
128     back_frame->pc = frame->pc;  in Unwind()
129     back_frame->sp = frame->sp;  in Unwind()
131     char* demangled_name = __cxa_demangle(frame->function_name.c_str(), nullptr, nullptr, nullptr);  in Unwind()
136       back_frame->func_name = frame->function_name;  in Unwind()
138     back_frame->func_offset = frame->function_offset;  in Unwind()
140     back_frame->map.name = frame->map_name;  in Unwind()
141     back_frame->map.start = frame->map_start;  in Unwind()
142     back_frame->map.end = frame->map_end;  in Unwind()
143     back_frame->map.offset = frame->map_elf_start_offset;  in Unwind()
144     back_frame->map.load_bias = frame->map_load_bias;  in Unwind()
145     back_frame->map.flags = frame->map_flags;  in Unwind()