57   fprintf(stderr, "USAGE: unwind_for_offline [-t] [-e FILE] [-f[FILE]] <PID>\n\n");  in usage()
58   fprintf(stderr, "OPTIONS:\n");  in usage()
59   fprintf(stderr, "-t\n");  in usage()
60   fprintf(stderr, "       Dump offline snapshot for all threads of <PID>.\n");  in usage()
61   fprintf(stderr, "-e FILE\n");  in usage()
62   fprintf(stderr, "       If FILE is a valid ELF file included in /proc/<PID>/maps,\n");  in usage()
63   fprintf(stderr, "       unwind_for_offline will wait until the current frame (PC)\n");  in usage()
64   fprintf(stderr, "       lies within the .so file given by FILE. FILE should be\n");  in usage()
65   fprintf(stderr, "       base name of the path (the component following the final\n");  in usage()
66   fprintf(stderr, "       '/') rather than the fully qualified path.\n");  in usage()
67   fprintf(stderr, "-f [FILE]\n");  in usage()
68   fprintf(stderr, "       Write info (e.g. frames and stack range) logs to a file\n");  in usage()
69   fprintf(stderr, "       rather than to the stdout/stderr. If FILE is not\n");  in usage()
70   fprintf(stderr, "       specified, the output file will be named 'output.txt'.\n");  in usage()
80     fprintf(stderr, "Process %d does not use library %s.\n", proc.pid(), elf_name.c_str());  in EnsureProcInDesiredElf()
91     fprintf(stderr, "Failed to create directory for tid %d\n", tid);  in CreateAndChangeDumpDir()
105     fprintf(fp.get(), "%s: %" PRIx64 "\n", name, value);  in SaveRegs()
127       fprintf(stderr, "Unable to read stack data.\n");  in SaveStack()
131     fprintf(output_fp, "\nSaving the stack 0x%" PRIx64 "-0x%" PRIx64 "\n", sp_start, sp_end);  in SaveStack()
141       fprintf(stderr, "Failed to write sp_start data: sizeof(sp_start) %zu, written %zu\n",  in SaveStack()
148       fprintf(stderr, "Failed to write all stack data: stack size %zu, written %zu\n",  in SaveStack()
171     fprintf(stderr, "Cannot read data from address %" PRIx64 " length %zu\n", info->start,  in CreateElfFromMemory()
184     fprintf(stderr, "Failed to write all data to file: bytes read %zu, written %zu\n", bytes,  in CreateElfFromMemory()
218       fprintf(stderr, "Bytes written doesn't match bytes read: read %zu, written %zu\n", bytes,  in CopyElfFromFile()
255   fprintf(stderr, "Cannot save memory or file for map ");  in SaveMapInformation()
257     fprintf(stderr, "%s\n", info->name.c_str());  in SaveMapInformation()
259     fprintf(stderr, "anonymous:%" PRIx64 "\n", info->start);  in SaveMapInformation()
264   fprintf(output_fp, "-------------------- tid = %d %s--------------------\n", tid,  in SaveData()
268     fprintf(stderr, "Unable to get remote reg data.\n");  in SaveData()
326     fprintf(output_fp, "%s\n", unwinder.FormatFrame(i).c_str());  in SaveData()
356     fprintf(map_fp.get(), "%" PRIx64 "-%" PRIx64 " %s %" PRIx64 " 00:00 0", map.start, map.end,  in SaveData()
359       fprintf(map_fp.get(), "   %s", map.name.c_str());  in SaveData()
361     fprintf(map_fp.get(), "\n");  in SaveData()
364   fprintf(output_fp, "------------------------------------------------------------------\n");  in SaveData()
385           fprintf(stderr, "Missing argument for option e.\n");  in main()
393           fprintf(stderr, "Ensure there is no space between '-f' and the filename provided.\n");  in main()
401           fprintf(stderr, "Unknown option `-%c'.\n", optopt);  in main()
403           fprintf(stderr, "Unknown option character `\\x%x'.\n", optopt);  in main()
407         fprintf(stderr, "Missing arg for option %c.\n", optopt);  in main()