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 NSEC_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, nsec;
 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, &nsec);
 167                 if (ret == 2) {
 168                         *tline = strchr(line, ']');
 169                         if ((*tline)[1] == ' ')
 170                                 (*tline)++;
 171                         *tlen = len + line - *tline;
 172                         *ts = (uint64_t) sec * NSEC_PER_SEC + (uint64_t) nsec;
 173                 }
 174         }
 175         /* timestamp */
 176         ctf_align_pos(pos, sizeof(uint64_t) * CHAR_BIT);
 177         if (!pos->dummy)
 178                 *(uint32_t *) ctf_get_pos_addr(pos) = *ts;
 179         ctf_move_pos(pos, sizeof(uint64_t) * CHAR_BIT);
 180 }
 181
 182 static
 183 void trace_string(char *line, struct ctf_stream_pos *pos, size_t len)
 184 {
 185         struct ctf_stream_pos dummy;
 186         int attempt = 0;
 187         char *tline = line;     /* tline is start of text, after timestamp */
 188         size_t tlen = len;
 189         uint64_t ts = 0;
 190
 191         printf_debug("read: %s\n", line);
 192 retry:
 193         ctf_dummy_pos(pos, &dummy);
 194         write_event_header(&dummy, line, &tline, len, &tlen, &ts);
 195         ctf_align_pos(&dummy, sizeof(uint8_t) * CHAR_BIT);
 196         ctf_move_pos(&dummy, tlen * CHAR_BIT);
 197         if (ctf_pos_packet(&dummy)) {
 198                 ctf_pos_pad_packet(pos);
 199                 write_packet_header(pos, s_uuid);
 200                 write_packet_context(pos);
 201                 if (attempt++ == 1) {
 202                         fprintf(stdout, "[Error] Line too large for packet size (%zukB) (discarded)\n",
 203                                 pos->packet_size / CHAR_BIT / 1024);
 204                         return;
 205                 }
 206                 goto retry;
 207         }
 208
 209         write_event_header(pos, line, &tline, len, &tlen, &ts);
 210         ctf_align_pos(pos, sizeof(uint8_t) * CHAR_BIT);
 211         memcpy(ctf_get_pos_addr(pos), tline, tlen);
 212         ctf_move_pos(pos, tlen * CHAR_BIT);
 213 }
 214
 215 static
 216 void trace_text(FILE *input, int output)
 217 {
 218         struct ctf_stream_pos pos;
 219         ssize_t len;
 220         char *line = NULL, *nl;
 221         size_t linesize;
 222
 223         ctf_init_pos(&pos, output, O_RDWR);
 224
 225         write_packet_header(&pos, s_uuid);
 226         write_packet_context(&pos);
 227         for (;;) {
 228                 len = getline(&line, &linesize, input);
 229                 if (len < 0)
 230                         break;
 231                 nl = strrchr(line, '\n');
 232                 if (nl)
 233                         *nl = '\0';
 234                 trace_string(line, &pos, nl - line + 1);
 235         }
 236         ctf_fini_pos(&pos);
 237 }
 238
 239 static
 240 void usage(FILE *fp)
 241 {
 242         fprintf(fp, "BabelTrace Log Converter %u.%u\n",
 243                 BABELTRACE_VERSION_MAJOR,
 244                 BABELTRACE_VERSION_MINOR);
 245         fprintf(fp, "\n");
 246         fprintf(fp, "Convert for a text log (read from standard input) to CTF.\n");
 247         fprintf(fp, "\n");
 248         fprintf(fp, "usage : babeltrace-log OUTPUT\n");
 249         fprintf(fp, "\n");
 250         fprintf(fp, "  OUTPUT                         Output trace path\n");
 251         fprintf(fp, "\n");
 252 }
 253
 254 static
 255 int parse_args(int argc, char **argv)
 256 {
 257         int i;
 258
 259         for (i = 1; i < argc; i++) {
 260                 if (!strcmp(argv[i], "-t"))
 261                         s_timestamp = 1;
 262                 else
 263                         s_outputname = argv[i];
 264         }
 265         if (!s_outputname)
 266                 return -EINVAL;
 267         return 0;
 268 }
 269
 270 int main(int argc, char **argv)
 271 {
 272         int fd, metadata_fd, ret;
 273         DIR *dir;
 274         int dir_fd;
 275         FILE *metadata_fp;
 276
 277         ret = parse_args(argc, argv);
 278         if (ret) {
 279                 usage(stdout);
 280                 goto error;
 281         }
 282
 283         ret = mkdir(s_outputname, S_IRWXU|S_IRWXG);
 284         if (ret) {
 285                 perror("mkdir");
 286                 goto error;
 287         }
 288
 289         dir = opendir(s_outputname);
 290         if (!dir) {
 291                 perror("opendir");
 292                 goto error_rmdir;
 293         }
 294         dir_fd = dirfd(dir);
 295         if (dir_fd < 0) {
 296                 perror("dirfd");
 297                 goto error_closedir;
 298         }
 299
 300         fd = openat(dir_fd, "datastream", O_RDWR|O_CREAT,
 301                     S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP);
 302         if (fd < 0) {
 303                 perror("openat");
 304                 goto error_closedirfd;
 305         }
 306
 307         metadata_fd = openat(dir_fd, "metadata", O_RDWR|O_CREAT,
 308                              S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP);
 309         if (fd < 0) {
 310                 perror("openat");
 311                 goto error_closedatastream;
 312         }
 313         metadata_fp = fdopen(metadata_fd, "w");
 314         if (!metadata_fp) {
 315                 perror("fdopen");
 316                 goto error_closemetadatafd;
 317         }
 318
 319         uuid_generate(s_uuid);
 320         print_metadata(metadata_fp);
 321         trace_text(stdin, fd);
 322
 323         close(fd);
 324         exit(EXIT_SUCCESS);
 325
 326         /* error handling */
 327 error_closemetadatafd:
 328         ret = close(metadata_fd);
 329         if (ret)
 330                 perror("close");
 331 error_closedatastream:
 332         ret = close(fd);
 333         if (ret)
 334                 perror("close");
 335 error_closedirfd:
 336         ret = close(dir_fd);
 337         if (ret)
 338                 perror("close");
 339 error_closedir:
 340         ret = closedir(dir);
 341         if (ret)
 342                 perror("closedir");
 343 error_rmdir:
 344         ret = rmdir(s_outputname);
 345         if (ret)
 346                 perror("rmdir");
 347 error:
 348         exit(EXIT_FAILURE);
 349 }