converter/babeltrace-log.c

   1 /*
   2  * babeltrace-log.c
   3  *
   4  * BabelTrace - Convert Text Log to CTF
   5  *
   6  * Copyright 2010, 2011 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
   7  *
   8  * Permission is hereby granted, free of charge, to any person obtaining a copy
   9  * of this software and associated documentation files (the "Software"), to deal
  10  * in the Software without restriction, including without limitation the rights
  11  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  12  * copies of the Software, and to permit persons to whom the Software is
  13  * furnished to do so, subject to the following conditions:
  14  *
  15  * The above copyright notice and this permission notice shall be included in
  16  * all copies or substantial portions of the Software.
  17  *
  18  * Depends on glibc 2.10 for getline().
  19  */
  20
  21 #include <sys/types.h>
  22 #include <sys/stat.h>
  23 #include <fcntl.h>
  24 #include <sys/mman.h>
  25 #include <dirent.h>
  26 #include <stdio.h>
  27 #include <stdlib.h>
  28 #include <stdint.h>
  29 #include <unistd.h>
  30 #include <errno.h>
  31 #include <uuid/uuid.h>
  32 #include <string.h>
  33 #include <endian.h>
  34
  35 #include <babeltrace/babeltrace.h>
  36 #include <babeltrace/ctf/types.h>
  37
  38 #define USEC_PER_SEC 1000000UL
  39
  40 #ifndef UUID_STR_LEN
  41 #define UUID_STR_LEN    37      /* With \0 */
  42 #endif
  43
  44 int babeltrace_debug, babeltrace_verbose;
  45
  46 static char *s_outputname;
  47 static int s_timestamp;
  48 static uuid_t s_uuid;
  49
  50 /* Metadata format string */
  51 static const char metadata_fmt[] =
  52 "typealias integer { size = 8; align = 8; signed = false; } := uint8_t;\n"
  53 "typealias integer { size = 32; align = 32; signed = false; } := uint32_t;\n"
  54 "\n"
  55 "trace {\n"
  56 "       major = %u;\n"                  /* major (e.g. 0) */
  57 "       minor = %u;\n"                  /* minor (e.g. 1) */
  58 "       uuid = \"%s\";\n"               /* UUID */
  59 "       byte_order = %s;\n"             /* be or le */
  60 "       packet.header := struct {\n"
  61 "               uint32_t magic;\n"
  62 "               uint8_t  trace_uuid[16];\n"
  63 "       };\n"
  64 "};\n"
  65 "\n"
  66 "stream {\n"
  67 "       packet.context := struct {\n"
  68 "               uint32_t content_size;\n"
  69 "               uint32_t packet_size;\n"
  70 "       };\n"
  71 "%s"                                    /* Stream event header (opt.) */
  72 "};\n"
  73 "\n"
  74 "event {\n"
  75 "       name = string;\n"
  76 "       fields := struct { string str; };\n"
  77 "};\n";
  78
  79 static const char metadata_stream_event_header_timestamp[] =
  80 "       typealias integer { size = 64; align = 64; signed = false; } := uint64_t;\n"
  81 "       event.header := struct {\n"
  82 "               uint64_t timestamp;\n"
  83 "       };\n";
  84
  85 static
  86 void print_metadata(FILE *fp)
  87 {
  88         char uuid_str[UUID_STR_LEN];
  89
  90         uuid_unparse(s_uuid, uuid_str);
  91         fprintf(fp, metadata_fmt,
  92                 BABELTRACE_VERSION_MAJOR,
  93                 BABELTRACE_VERSION_MINOR,
  94                 uuid_str,
  95                 BYTE_ORDER == LITTLE_ENDIAN ? "le" : "be",
  96                 s_timestamp ? metadata_stream_event_header_timestamp : "");
  97 }
  98
  99 static
 100 void write_packet_header(struct ctf_stream_pos *pos, uuid_t uuid)
 101 {
 102         struct ctf_stream_pos dummy;
 103
 104         /* magic */
 105         ctf_dummy_pos(pos, &dummy);
 106         ctf_align_pos(&dummy, sizeof(uint32_t) * CHAR_BIT);
 107         ctf_move_pos(&dummy, sizeof(uint32_t) * CHAR_BIT);
 108         assert(!ctf_pos_packet(&dummy));
 109
 110         ctf_align_pos(pos, sizeof(uint32_t) * CHAR_BIT);
 111         *(uint32_t *) ctf_get_pos_addr(pos) = 0xC1FC1FC1;
 112         ctf_move_pos(pos, sizeof(uint32_t) * CHAR_BIT);
 113
 114         /* trace_uuid */
 115         ctf_dummy_pos(pos, &dummy);
 116         ctf_align_pos(&dummy, sizeof(uint8_t) * CHAR_BIT);
 117         ctf_move_pos(&dummy, 16 * CHAR_BIT);
 118         assert(!ctf_pos_packet(&dummy));
 119
 120         ctf_align_pos(pos, sizeof(uint8_t) * CHAR_BIT);
 121         memcpy(ctf_get_pos_addr(pos), uuid, 16);
 122         ctf_move_pos(pos, 16 * CHAR_BIT);
 123 }
 124
 125 static
 126 void write_packet_context(struct ctf_stream_pos *pos)
 127 {
 128         struct ctf_stream_pos dummy;
 129
 130         /* content_size */
 131         ctf_dummy_pos(pos, &dummy);
 132         ctf_align_pos(&dummy, sizeof(uint32_t) * CHAR_BIT);
 133         ctf_move_pos(&dummy, sizeof(uint32_t) * CHAR_BIT);
 134         assert(!ctf_pos_packet(&dummy));
 135
 136         ctf_align_pos(pos, sizeof(uint32_t) * CHAR_BIT);
 137         *(uint32_t *) ctf_get_pos_addr(pos) = -1U;      /* Not known yet */
 138         pos->content_size_loc = (uint32_t *) ctf_get_pos_addr(pos);
 139         ctf_move_pos(pos, sizeof(uint32_t) * CHAR_BIT);
 140
 141         /* packet_size */
 142         ctf_dummy_pos(pos, &dummy);
 143         ctf_align_pos(&dummy, sizeof(uint32_t) * CHAR_BIT);
 144         ctf_move_pos(&dummy, sizeof(uint32_t) * CHAR_BIT);
 145         assert(!ctf_pos_packet(&dummy));
 146
 147         ctf_align_pos(pos, sizeof(uint32_t) * CHAR_BIT);
 148         *(uint32_t *) ctf_get_pos_addr(pos) = pos->packet_size;
 149         ctf_move_pos(pos, sizeof(uint32_t) * CHAR_BIT);
 150 }
 151
 152 static
 153 void write_event_header(struct ctf_stream_pos *pos, char *line,
 154                         char **tline, size_t len, size_t *tlen,
 155                         uint64_t *ts)
 156 {
 157         unsigned long sec, usec;
 158         int ret;
 159
 160         if (!s_timestamp)
 161                 return;
 162
 163         /* Only need to be executed on first pass (dummy) */
 164         if (pos->dummy) {
 165                 /* Extract time from input line */
 166                 ret = sscanf(line, "[%lu.%lu] ", &sec, &usec);
 167                 if (ret == 2) {
 168                         *tline = strchr(line, ']');
 169                         assert(*tline);
 170                         (*tline)++;
 171                         if ((*tline)[0] == ' ') {
 172                                 (*tline)++;
 173                         }
 174                         *tlen = len + line - *tline;
 175                         *ts = (uint64_t) sec * USEC_PER_SEC + (uint64_t) usec;
 176                 }
 177         }
 178         /* timestamp */
 179         ctf_align_pos(pos, sizeof(uint64_t) * CHAR_BIT);
 180         if (!pos->dummy)
 181                 *(uint32_t *) ctf_get_pos_addr(pos) = *ts;
 182         ctf_move_pos(pos, sizeof(uint64_t) * CHAR_BIT);
 183 }
 184
 185 static
 186 void trace_string(char *line, struct ctf_stream_pos *pos, size_t len)
 187 {
 188         struct ctf_stream_pos dummy;
 189         int attempt = 0;
 190         char *tline = line;     /* tline is start of text, after timestamp */
 191         size_t tlen = len;
 192         uint64_t ts = 0;
 193
 194         printf_debug("read: %s\n", line);
 195 retry:
 196         ctf_dummy_pos(pos, &dummy);
 197         write_event_header(&dummy, line, &tline, len, &tlen, &ts);
 198         ctf_align_pos(&dummy, sizeof(uint8_t) * CHAR_BIT);
 199         ctf_move_pos(&dummy, tlen * CHAR_BIT);
 200         if (ctf_pos_packet(&dummy)) {
 201                 ctf_pos_pad_packet(pos);
 202                 write_packet_header(pos, s_uuid);
 203                 write_packet_context(pos);
 204                 if (attempt++ == 1) {
 205                         fprintf(stdout, "[Error] Line too large for packet size (%zukB) (discarded)\n",
 206                                 pos->packet_size / CHAR_BIT / 1024);
 207                         return;
 208                 }
 209                 goto retry;
 210         }
 211
 212         write_event_header(pos, line, &tline, len, &tlen, &ts);
 213         ctf_align_pos(pos, sizeof(uint8_t) * CHAR_BIT);
 214         memcpy(ctf_get_pos_addr(pos), tline, tlen);
 215         ctf_move_pos(pos, tlen * CHAR_BIT);
 216 }
 217
 218 static
 219 void trace_text(FILE *input, int output)
 220 {
 221         struct ctf_stream_pos pos;
 222         ssize_t len;
 223         char *line = NULL, *nl;
 224         size_t linesize;
 225
 226         ctf_init_pos(&pos, output, O_RDWR);
 227
 228         write_packet_header(&pos, s_uuid);
 229         write_packet_context(&pos);
 230         for (;;) {
 231                 len = getline(&line, &linesize, input);
 232                 if (len < 0)
 233                         break;
 234                 nl = strrchr(line, '\n');
 235                 if (nl)
 236                         *nl = '\0';
 237                 trace_string(line, &pos, nl - line + 1);
 238         }
 239         ctf_fini_pos(&pos);
 240 }
 241
 242 static
 243 void usage(FILE *fp)
 244 {
 245         fprintf(fp, "BabelTrace Log Converter %u.%u\n",
 246                 BABELTRACE_VERSION_MAJOR,
 247                 BABELTRACE_VERSION_MINOR);
 248         fprintf(fp, "\n");
 249         fprintf(fp, "Convert for a text log (read from standard input) to CTF.\n");
 250         fprintf(fp, "\n");
 251         fprintf(fp, "usage : babeltrace-log OUTPUT\n");
 252         fprintf(fp, "\n");
 253         fprintf(fp, "  OUTPUT                         Output trace path\n");
 254         fprintf(fp, "\n");
 255 }
 256
 257 static
 258 int parse_args(int argc, char **argv)
 259 {
 260         int i;
 261
 262         for (i = 1; i < argc; i++) {
 263                 if (!strcmp(argv[i], "-t"))
 264                         s_timestamp = 1;
 265                 else
 266                         s_outputname = argv[i];
 267         }
 268         if (!s_outputname)
 269                 return -EINVAL;
 270         return 0;
 271 }
 272
 273 int main(int argc, char **argv)
 274 {
 275         int fd, metadata_fd, ret;
 276         DIR *dir;
 277         int dir_fd;
 278         FILE *metadata_fp;
 279
 280         ret = parse_args(argc, argv);
 281         if (ret) {
 282                 usage(stdout);
 283                 goto error;
 284         }
 285
 286         ret = mkdir(s_outputname, S_IRWXU|S_IRWXG);
 287         if (ret) {
 288                 perror("mkdir");
 289                 goto error;
 290         }
 291
 292         dir = opendir(s_outputname);
 293         if (!dir) {
 294                 perror("opendir");
 295                 goto error_rmdir;
 296         }
 297         dir_fd = dirfd(dir);
 298         if (dir_fd < 0) {
 299                 perror("dirfd");
 300                 goto error_closedir;
 301         }
 302
 303         fd = openat(dir_fd, "datastream", O_RDWR|O_CREAT,
 304                     S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP);
 305         if (fd < 0) {
 306                 perror("openat");
 307                 goto error_closedirfd;
 308         }
 309
 310         metadata_fd = openat(dir_fd, "metadata", O_RDWR|O_CREAT,
 311                              S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP);
 312         if (fd < 0) {
 313                 perror("openat");
 314                 goto error_closedatastream;
 315         }
 316         metadata_fp = fdopen(metadata_fd, "w");
 317         if (!metadata_fp) {
 318                 perror("fdopen");
 319                 goto error_closemetadatafd;
 320         }
 321
 322         uuid_generate(s_uuid);
 323         print_metadata(metadata_fp);
 324         trace_text(stdin, fd);
 325
 326         close(fd);
 327         exit(EXIT_SUCCESS);
 328
 329         /* error handling */
 330 error_closemetadatafd:
 331         ret = close(metadata_fd);
 332         if (ret)
 333                 perror("close");
 334 error_closedatastream:
 335         ret = close(fd);
 336         if (ret)
 337                 perror("close");
 338 error_closedirfd:
 339         ret = close(dir_fd);
 340         if (ret)
 341                 perror("close");
 342 error_closedir:
 343         ret = closedir(dir);
 344         if (ret)
 345                 perror("closedir");
 346 error_rmdir:
 347         ret = rmdir(s_outputname);
 348         if (ret)
 349                 perror("rmdir");
 350 error:
 351         exit(EXIT_FAILURE);
 352 }