src/common/common.h

   1 #ifndef BABELTRACE_COMMON_INTERNAL_H
   2 #define BABELTRACE_COMMON_INTERNAL_H
   3
   4 /*
   5  * Copyright (c) 2018 EfficiOS Inc. and Linux Foundation
   6  * Copyright (c) 2018 Philippe Proulx <pproulx@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  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  19  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  21  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  22  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  23  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  24  * SOFTWARE.
  25  */
  26
  27 #include <stdbool.h>
  28 #include "common/assert.h"
  29 #include "common/babeltrace.h"
  30 #include <babeltrace2/trace-ir/field-class-const.h>
  31 #include <babeltrace2/trace-ir/field-path-const.h>
  32 #include <babeltrace2/trace-ir/event-class-const.h>
  33 #include <babeltrace2/graph/self-message-iterator.h>
  34 #include <babeltrace2/value.h>
  35 #include <inttypes.h>
  36 #include <stdarg.h>
  37 #include <stdint.h>
  38 #include <unistd.h>
  39 #include <glib.h>
  40
  41 #define BT_COMMON_COLOR_RESET              "\033[0m"
  42 #define BT_COMMON_COLOR_BOLD               "\033[1m"
  43 #define BT_COMMON_COLOR_FG_DEFAULT         "\033[39m"
  44 #define BT_COMMON_COLOR_FG_RED             "\033[31m"
  45 #define BT_COMMON_COLOR_FG_GREEN           "\033[32m"
  46 #define BT_COMMON_COLOR_FG_YELLOW          "\033[33m"
  47 #define BT_COMMON_COLOR_FG_BLUE            "\033[34m"
  48 #define BT_COMMON_COLOR_FG_MAGENTA         "\033[35m"
  49 #define BT_COMMON_COLOR_FG_CYAN            "\033[36m"
  50 #define BT_COMMON_COLOR_FG_LIGHT_GRAY      "\033[37m"
  51 #define BT_COMMON_COLOR_BG_DEFAULT         "\033[49m"
  52 #define BT_COMMON_COLOR_BG_RED             "\033[41m"
  53 #define BT_COMMON_COLOR_BG_GREEN           "\033[42m"
  54 #define BT_COMMON_COLOR_BG_YELLOW          "\033[43m"
  55 #define BT_COMMON_COLOR_BG_BLUE            "\033[44m"
  56 #define BT_COMMON_COLOR_BG_MAGENTA         "\033[45m"
  57 #define BT_COMMON_COLOR_BG_CYAN            "\033[46m"
  58 #define BT_COMMON_COLOR_BG_LIGHT_GRAY      "\033[47m"
  59
  60 struct bt_common_lttng_live_url_parts {
  61         GString *proto;
  62         GString *hostname;
  63         GString *target_hostname;
  64         GString *session_name;
  65
  66         /* -1 means default port */
  67         int port;
  68 };
  69
  70 /*
  71  * Checks if the current process has setuid or setgid access rights.
  72  * Returns `true` if so.
  73  */
  74 BT_HIDDEN
  75 bool bt_common_is_setuid_setgid(void);
  76
  77 /*
  78  * Returns the system-wide plugin path, e.g.
  79  * `/usr/lib/babeltrace2/plugins`. Do not free the return value.
  80  */
  81 BT_HIDDEN
  82 const char *bt_common_get_system_plugin_path(void);
  83
  84 /*
  85  * Returns the user plugin path, e.g.
  86  * `/home/user/.local/lib/babeltrace2/plugins`. You need to free the
  87  * return value.
  88  */
  89 BT_HIDDEN
  90 char *bt_common_get_home_plugin_path(void);
  91
  92 /*
  93  * Appends the list of directories in `paths` to the array `dirs`.
  94  * `paths` is a list of directories separated by `:`. Returns 0 on
  95  * success.
  96  */
  97 BT_HIDDEN
  98 int bt_common_append_plugin_path_dirs(const char *paths, GPtrArray *dirs);
  99
 100 /*
 101  * Returns `true` if terminal color codes are supported for this
 102  * process.
 103  */
 104 BT_HIDDEN
 105 bool bt_common_colors_supported(void);
 106
 107 BT_HIDDEN
 108 const char *bt_common_color_reset(void);
 109
 110 BT_HIDDEN
 111 const char *bt_common_color_bold(void);
 112
 113 BT_HIDDEN
 114 const char *bt_common_color_fg_default(void);
 115
 116 BT_HIDDEN
 117 const char *bt_common_color_fg_red(void);
 118
 119 BT_HIDDEN
 120 const char *bt_common_color_fg_green(void);
 121
 122 BT_HIDDEN
 123 const char *bt_common_color_fg_yellow(void);
 124
 125 BT_HIDDEN
 126 const char *bt_common_color_fg_blue(void);
 127
 128 BT_HIDDEN
 129 const char *bt_common_color_fg_magenta(void);
 130
 131 BT_HIDDEN
 132 const char *bt_common_color_fg_cyan(void);
 133
 134 BT_HIDDEN
 135 const char *bt_common_color_fg_light_gray(void);
 136
 137 BT_HIDDEN
 138 const char *bt_common_color_bg_default(void);
 139
 140 BT_HIDDEN
 141 const char *bt_common_color_bg_red(void);
 142
 143 BT_HIDDEN
 144 const char *bt_common_color_bg_green(void);
 145
 146 BT_HIDDEN
 147 const char *bt_common_color_bg_yellow(void);
 148
 149 BT_HIDDEN
 150 const char *bt_common_color_bg_blue(void);
 151
 152 BT_HIDDEN
 153 const char *bt_common_color_bg_magenta(void);
 154
 155 BT_HIDDEN
 156 const char *bt_common_color_bg_cyan(void);
 157
 158 BT_HIDDEN
 159 const char *bt_common_color_bg_light_gray(void);
 160
 161 /*
 162  * Returns the substring from `input` to the first character found
 163  * in the list of characters `end_chars`, unescaping any character
 164  * found in `escapable_chars`, and sets `*end_pos` to the position of
 165  * the end (from `input`). The caller owns the returned GString.
 166  */
 167 BT_HIDDEN
 168 GString *bt_common_string_until(const char *input, const char *escapable_chars,
 169                     const char *end_chars, size_t *end_pos);
 170
 171 /*
 172  * Returns the quoted version of `input` for a shell. If
 173  * `with_single_quotes` is `true`, prepends and appends the `'` prefix
 174  * and suffix to the returned string; otherwise the caller should
 175  * prepend and append them manually, although they are not always
 176  * required. The caller owns the returned GString.
 177  */
 178 BT_HIDDEN
 179 GString *bt_common_shell_quote(const char *input, bool with_single_quotes);
 180
 181 /*
 182  * Returns `true` if `input` is a string made only of printable
 183  * characters.
 184  */
 185 BT_HIDDEN
 186 bool bt_common_string_is_printable(const char *input);
 187
 188 /*
 189  * Destroys the parts of an LTTng live URL as returned by
 190  * bt_common_parse_lttng_live_url().
 191  */
 192 BT_HIDDEN
 193 void bt_common_destroy_lttng_live_url_parts(
 194                 struct bt_common_lttng_live_url_parts *parts);
 195
 196 /*
 197  * Parses the LTTng live URL `url` and returns its different parts.
 198  * If there's an error, writes the error message into `*error_buf`
 199  * up to `error_buf_size` bytes. You must destroy the returned value
 200  * with bt_common_destroy_lttng_live_url_parts().
 201  */
 202 BT_HIDDEN
 203 struct bt_common_lttng_live_url_parts bt_common_parse_lttng_live_url(
 204                 const char *url, char *error_buf, size_t error_buf_size);
 205
 206 /*
 207  * Normalizes (in place) a star globbing pattern to be used with
 208  * bt_common_star_glob_match(). This function always succeeds.
 209  */
 210 BT_HIDDEN
 211 void bt_common_normalize_star_glob_pattern(char *pattern);
 212
 213 /*
 214  * Returns `true` if `candidate` (of size `candidate_len`) matches
 215  * the star globbing pattern `pattern` (of size `pattern_len`).
 216  */
 217 BT_HIDDEN
 218 bool bt_common_star_glob_match(const char *pattern, size_t pattern_len,
 219                 const char *candidate, size_t candidate_len);
 220
 221 /*
 222  * Normalizes the path `path`:
 223  *
 224  * * If it's a relative path, converts it to an absolute path using
 225  *   `wd` as the working directory (or the current working directory
 226  *   if `wd` is NULL).
 227  * * Removes consecutive and trailing slashes.
 228  * * Resolves `..` and `.` in the path (both in `path` and in `wd`).
 229  * * Does NOT resolve symbolic links.
 230  *
 231  * The caller owns the returned GString.
 232  */
 233 BT_HIDDEN
 234 GString *bt_common_normalize_path(const char *path, const char *wd);
 235
 236 typedef void (* bt_common_handle_custom_specifier_func)(void *priv_data,
 237                 char **buf, size_t avail_size, const char **fmt, va_list *args);
 238
 239 /*
 240  * This is a custom vsnprintf() which handles the standard conversion
 241  * specifier as well as custom ones.
 242  *
 243  * `fmt` is a typical printf()-style format string, with the following
 244  * limitations:
 245  *
 246  * * The `*` width specifier is not accepted.
 247  * * The `*` precision specifier is not accepted.
 248  * * The `j` and `t` length modifiers are not accepted.
 249  * * The `n` format specifier is not accepted.
 250  * * The format specifiers defined in <inttypes.h> are not accepted
 251  *   except for `PRId64`, `PRIu64`, `PRIx64`, `PRIX64`, `PRIo64`, and
 252  *   `PRIi64`.
 253  *
 254  * `intro` specifies which special character immediately following an
 255  * introductory `%` character in `fmt` is used to indicate a custom
 256  * conversion specifier. For example, if `intro` is '@', then any `%@`
 257  * sequence in `fmt` is the beginning of a custom conversion specifier.
 258  *
 259  * When a custom conversion specifier is encountered in `fmt`,
 260  * the function calls `handle_specifier`. This callback receives:
 261  *
 262  * `priv_data`:
 263  *     Custom, private data.
 264  *
 265  * `buf`:
 266  *     Address of the current buffer pointer. `*buf` is the position to
 267  *     append new data. The callback must update `*buf` when appending
 268  *     new data. The callback must ensure not to write passed the whole
 269  *     buffer passed to bt_common_custom_vsnprintf().
 270  *
 271  * `avail_size`:
 272  *     Number of bytes left in whole buffer from the `*buf` point.
 273  *
 274  * `fmt`:
 275  *     Address of the current format string pointer. `*fmt` points to
 276  *     the introductory `%` character, which is followed by the
 277  *     character `intro`. The callback must update `*fmt` so that it
 278  *     points after the whole custom conversion specifier.
 279  *
 280  * `args`:
 281  *     Variable argument list. Use va_arg() to get new arguments from
 282  *     this list and update it at the same time.
 283  *
 284  * Because this is an internal utility, this function and its callback
 285  * do not return error codes: they abort when there's any error (bad
 286  * format string, for example).
 287  */
 288 BT_HIDDEN
 289 void bt_common_custom_vsnprintf(char *buf, size_t buf_size,
 290                 char intro,
 291                 bt_common_handle_custom_specifier_func handle_specifier,
 292                 void *priv_data, const char *fmt, va_list *args);
 293
 294 /*
 295  * Variadic form of bt_common_custom_vsnprintf().
 296  */
 297 BT_HIDDEN
 298 void bt_common_custom_snprintf(char *buf, size_t buf_size,
 299                 char intro,
 300                 bt_common_handle_custom_specifier_func handle_specifier,
 301                 void *priv_data, const char *fmt, ...);
 302
 303 /*
 304  * Returns the system page size.
 305  */
 306 BT_HIDDEN
 307 size_t bt_common_get_page_size(void);
 308
 309 /*
 310  * Wraps read() function to handle EINTR and partial reads.
 311  * On success, it returns `count` received as parameter. On error, it returns a
 312  * value smaller than the requested `count`.
 313  */
 314 static inline
 315 ssize_t bt_common_read(int fd, void *buf, size_t count)
 316 {
 317         size_t i = 0;
 318         ssize_t ret;
 319
 320         BT_ASSERT(buf);
 321
 322         /* Never return an overflow value. */
 323         BT_ASSERT(count <= SSIZE_MAX);
 324
 325         do {
 326                 ret = read(fd, buf + i, count - i);
 327                 if (ret < 0) {
 328                         if (errno == EINTR) {
 329 #ifdef BT_LOGD_STR
 330                                 BT_LOGD_STR("read() call interrupted. Retrying...");
 331 #endif
 332                                 /* retry operation */
 333                                 continue;
 334                         } else {
 335 #ifdef BT_LOGE_ERRNO
 336                                 BT_LOGE_ERRNO("Error while reading", ": fd=%d",
 337                                         fd);
 338 #endif
 339                                 goto end;
 340                         }
 341                 }
 342                 i += ret;
 343                 BT_ASSERT(i <= count);
 344         } while (count - i > 0 && ret > 0);
 345
 346 end:
 347         if (ret >= 0) {
 348                 if (i == 0) {
 349                         ret = -1;
 350                 } else {
 351                         ret = i;
 352                 }
 353         }
 354
 355         return ret;
 356 }
 357
 358 static inline
 359 const char *bt_common_field_class_type_string(enum bt_field_class_type class_type)
 360 {
 361         switch (class_type) {
 362         case BT_FIELD_CLASS_TYPE_UNSIGNED_INTEGER:
 363                 return "BT_FIELD_CLASS_TYPE_UNSIGNED_INTEGER";
 364         case BT_FIELD_CLASS_TYPE_SIGNED_INTEGER:
 365                 return "BT_FIELD_CLASS_TYPE_SIGNED_INTEGER";
 366         case BT_FIELD_CLASS_TYPE_REAL:
 367                 return "BT_FIELD_CLASS_TYPE_REAL";
 368         case BT_FIELD_CLASS_TYPE_UNSIGNED_ENUMERATION:
 369                 return "BT_FIELD_CLASS_TYPE_UNSIGNED_ENUMERATION";
 370         case BT_FIELD_CLASS_TYPE_SIGNED_ENUMERATION:
 371                 return "BT_FIELD_CLASS_TYPE_SIGNED_ENUMERATION";
 372         case BT_FIELD_CLASS_TYPE_STRING:
 373                 return "BT_FIELD_CLASS_TYPE_STRING";
 374         case BT_FIELD_CLASS_TYPE_STRUCTURE:
 375                 return "BT_FIELD_CLASS_TYPE_STRUCTURE";
 376         case BT_FIELD_CLASS_TYPE_STATIC_ARRAY:
 377                 return "BT_FIELD_CLASS_TYPE_STATIC_ARRAY";
 378         case BT_FIELD_CLASS_TYPE_DYNAMIC_ARRAY:
 379                 return "BT_FIELD_CLASS_TYPE_DYNAMIC_ARRAY";
 380         case BT_FIELD_CLASS_TYPE_VARIANT:
 381                 return "BT_FIELD_CLASS_TYPE_VARIANT";
 382         default:
 383                 return "(unknown)";
 384         }
 385 };
 386
 387 static inline
 388 const char *bt_common_field_class_integer_preferred_display_base_string(enum bt_field_class_integer_preferred_display_base base)
 389 {
 390         switch (base) {
 391         case BT_FIELD_CLASS_INTEGER_PREFERRED_DISPLAY_BASE_BINARY:
 392                 return "BT_FIELD_CLASS_INTEGER_PREFERRED_DISPLAY_BASE_BINARY";
 393         case BT_FIELD_CLASS_INTEGER_PREFERRED_DISPLAY_BASE_OCTAL:
 394                 return "BT_FIELD_CLASS_INTEGER_PREFERRED_DISPLAY_BASE_OCTAL";
 395         case BT_FIELD_CLASS_INTEGER_PREFERRED_DISPLAY_BASE_DECIMAL:
 396                 return "BT_FIELD_CLASS_INTEGER_PREFERRED_DISPLAY_BASE_DECIMAL";
 397         case BT_FIELD_CLASS_INTEGER_PREFERRED_DISPLAY_BASE_HEXADECIMAL:
 398                 return "BT_FIELD_CLASS_INTEGER_PREFERRED_DISPLAY_BASE_HEXADECIMAL";
 399         default:
 400                 return "(unknown)";
 401         }
 402 }
 403
 404 static inline
 405 const char *bt_common_scope_string(enum bt_scope scope)
 406 {
 407         switch (scope) {
 408         case BT_SCOPE_PACKET_CONTEXT:
 409                 return "BT_SCOPE_PACKET_CONTEXT";
 410         case BT_SCOPE_EVENT_COMMON_CONTEXT:
 411                 return "BT_SCOPE_EVENT_COMMON_CONTEXT";
 412         case BT_SCOPE_EVENT_SPECIFIC_CONTEXT:
 413                 return "BT_SCOPE_EVENT_SPECIFIC_CONTEXT";
 414         case BT_SCOPE_EVENT_PAYLOAD:
 415                 return "BT_SCOPE_EVENT_PAYLOAD";
 416         default:
 417                 return "(unknown)";
 418         }
 419 }
 420
 421 static inline
 422 const char *bt_common_event_class_log_level_string(
 423                 enum bt_event_class_log_level level)
 424 {
 425         switch (level) {
 426         case BT_EVENT_CLASS_LOG_LEVEL_EMERGENCY:
 427                 return "BT_EVENT_CLASS_LOG_LEVEL_EMERGENCY";
 428         case BT_EVENT_CLASS_LOG_LEVEL_ALERT:
 429                 return "BT_EVENT_CLASS_LOG_LEVEL_ALERT";
 430         case BT_EVENT_CLASS_LOG_LEVEL_CRITICAL:
 431                 return "BT_EVENT_CLASS_LOG_LEVEL_CRITICAL";
 432         case BT_EVENT_CLASS_LOG_LEVEL_ERROR:
 433                 return "BT_EVENT_CLASS_LOG_LEVEL_ERROR";
 434         case BT_EVENT_CLASS_LOG_LEVEL_WARNING:
 435                 return "BT_EVENT_CLASS_LOG_LEVEL_WARNING";
 436         case BT_EVENT_CLASS_LOG_LEVEL_NOTICE:
 437                 return "BT_EVENT_CLASS_LOG_LEVEL_NOTICE";
 438         case BT_EVENT_CLASS_LOG_LEVEL_INFO:
 439                 return "BT_EVENT_CLASS_LOG_LEVEL_INFO";
 440         case BT_EVENT_CLASS_LOG_LEVEL_DEBUG_SYSTEM:
 441                 return "BT_EVENT_CLASS_LOG_LEVEL_DEBUG_SYSTEM";
 442         case BT_EVENT_CLASS_LOG_LEVEL_DEBUG_PROGRAM:
 443                 return "BT_EVENT_CLASS_LOG_LEVEL_DEBUG_PROGRAM";
 444         case BT_EVENT_CLASS_LOG_LEVEL_DEBUG_PROCESS:
 445                 return "BT_EVENT_CLASS_LOG_LEVEL_DEBUG_PROCESS";
 446         case BT_EVENT_CLASS_LOG_LEVEL_DEBUG_MODULE:
 447                 return "BT_EVENT_CLASS_LOG_LEVEL_DEBUG_MODULE";
 448         case BT_EVENT_CLASS_LOG_LEVEL_DEBUG_UNIT:
 449                 return "BT_EVENT_CLASS_LOG_LEVEL_DEBUG_UNIT";
 450         case BT_EVENT_CLASS_LOG_LEVEL_DEBUG_FUNCTION:
 451                 return "BT_EVENT_CLASS_LOG_LEVEL_DEBUG_FUNCTION";
 452         case BT_EVENT_CLASS_LOG_LEVEL_DEBUG_LINE:
 453                 return "BT_EVENT_CLASS_LOG_LEVEL_DEBUG_LINE";
 454         case BT_EVENT_CLASS_LOG_LEVEL_DEBUG:
 455                 return "BT_EVENT_CLASS_LOG_LEVEL_DEBUG";
 456         default:
 457                 return "(unknown)";
 458         }
 459 };
 460
 461 static inline
 462 const char *bt_common_value_type_string(enum bt_value_type type)
 463 {
 464         switch (type) {
 465         case BT_VALUE_TYPE_NULL:
 466                 return "BT_VALUE_TYPE_NULL";
 467         case BT_VALUE_TYPE_BOOL:
 468                 return "BT_VALUE_TYPE_BOOL";
 469         case BT_VALUE_TYPE_UNSIGNED_INTEGER:
 470                 return "BT_VALUE_TYPE_UNSIGNED_INTEGER";
 471         case BT_VALUE_TYPE_SIGNED_INTEGER:
 472                 return "BT_VALUE_TYPE_SIGNED_INTEGER";
 473         case BT_VALUE_TYPE_REAL:
 474                 return "BT_VALUE_TYPE_REAL";
 475         case BT_VALUE_TYPE_STRING:
 476                 return "BT_VALUE_TYPE_STRING";
 477         case BT_VALUE_TYPE_ARRAY:
 478                 return "BT_VALUE_TYPE_ARRAY";
 479         case BT_VALUE_TYPE_MAP:
 480                 return "BT_VALUE_TYPE_MAP";
 481         default:
 482                 return "(unknown)";
 483         }
 484 };
 485
 486 static inline
 487 GString *bt_common_field_path_string(struct bt_field_path *path)
 488 {
 489         GString *str = g_string_new(NULL);
 490         uint64_t i;
 491
 492         BT_ASSERT(path);
 493
 494         if (!str) {
 495                 goto end;
 496         }
 497
 498         g_string_append_printf(str, "[%s", bt_common_scope_string(
 499                 bt_field_path_get_root_scope(path)));
 500
 501         for (i = 0; i < bt_field_path_get_item_count(path); i++) {
 502                 const struct bt_field_path_item *fp_item =
 503                         bt_field_path_borrow_item_by_index_const(path, i);
 504
 505                 switch (bt_field_path_item_get_type(fp_item)) {
 506                 case BT_FIELD_PATH_ITEM_TYPE_INDEX:
 507                         g_string_append_printf(str, ", %" PRIu64,
 508                                 bt_field_path_item_index_get_index(fp_item));
 509                         break;
 510                 case BT_FIELD_PATH_ITEM_TYPE_CURRENT_ARRAY_ELEMENT:
 511                         g_string_append(str, ", <CUR>");
 512                         break;
 513                 default:
 514                         abort();
 515                 }
 516         }
 517
 518         g_string_append(str, "]");
 519
 520 end:
 521         return str;
 522 }
 523
 524 static inline
 525 const char *bt_common_self_message_iterator_status_string(
 526                 enum bt_self_message_iterator_status status)
 527 {
 528         switch (status) {
 529         case BT_SELF_MESSAGE_ITERATOR_STATUS_AGAIN:
 530                 return "BT_SELF_MESSAGE_ITERATOR_STATUS_AGAIN";
 531         case BT_SELF_MESSAGE_ITERATOR_STATUS_END:
 532                 return "BT_SELF_MESSAGE_ITERATOR_STATUS_END";
 533         case BT_SELF_MESSAGE_ITERATOR_STATUS_OK:
 534                 return "BT_SELF_MESSAGE_ITERATOR_STATUS_OK";
 535         case BT_SELF_MESSAGE_ITERATOR_STATUS_ERROR:
 536                 return "BT_SELF_MESSAGE_ITERATOR_STATUS_ERROR";
 537         case BT_SELF_MESSAGE_ITERATOR_STATUS_NOMEM:
 538                 return "BT_SELF_MESSAGE_ITERATOR_STATUS_NOMEM";
 539         default:
 540                 return "(unknown)";
 541         }
 542 };
 543
 544 #define NS_PER_S_I      INT64_C(1000000000)
 545 #define NS_PER_S_U      UINT64_C(1000000000)
 546
 547 static inline
 548 int bt_common_clock_value_from_ns_from_origin(
 549                 int64_t cc_offset_seconds, uint64_t cc_offset_cycles,
 550                 uint64_t cc_freq, int64_t ns_from_origin,
 551                 uint64_t *raw_value)
 552 {
 553         int ret = 0;
 554         int64_t offset_in_ns;
 555         uint64_t value_in_ns;
 556         uint64_t rem_value_in_ns;
 557         uint64_t value_periods;
 558         uint64_t value_period_cycles;
 559         int64_t ns_to_add;
 560
 561         BT_ASSERT(raw_value);
 562
 563         /* Compute offset part of requested value, in nanoseconds */
 564         if (!bt_safe_to_mul_int64(cc_offset_seconds, NS_PER_S_I)) {
 565                 ret = -1;
 566                 goto end;
 567         }
 568
 569         offset_in_ns = cc_offset_seconds * NS_PER_S_I;
 570
 571         if (cc_freq == NS_PER_S_U) {
 572                 ns_to_add = (int64_t) cc_offset_cycles;
 573         } else {
 574                 if (!bt_safe_to_mul_int64((int64_t) cc_offset_cycles,
 575                                 NS_PER_S_I)) {
 576                         ret = -1;
 577                         goto end;
 578                 }
 579
 580                 ns_to_add = ((int64_t) cc_offset_cycles * NS_PER_S_I) /
 581                         (int64_t) cc_freq;
 582         }
 583
 584         if (!bt_safe_to_add_int64(offset_in_ns, ns_to_add)) {
 585                 ret = -1;
 586                 goto end;
 587         }
 588
 589         offset_in_ns += ns_to_add;
 590
 591         /* Value part in nanoseconds */
 592         if (ns_from_origin < offset_in_ns) {
 593                 ret = -1;
 594                 goto end;
 595         }
 596
 597         value_in_ns = (uint64_t) (ns_from_origin - offset_in_ns);
 598
 599         /* Number of whole clock periods in `value_in_ns` */
 600         value_periods = value_in_ns / NS_PER_S_U;
 601
 602         /* Remaining nanoseconds in cycles + whole clock periods in cycles */
 603         rem_value_in_ns = value_in_ns - value_periods * NS_PER_S_U;
 604
 605         if (value_periods > UINT64_MAX / cc_freq) {
 606                 ret = -1;
 607                 goto end;
 608         }
 609
 610         if (!bt_safe_to_mul_uint64(value_periods, cc_freq)) {
 611                 ret = -1;
 612                 goto end;
 613         }
 614
 615         value_period_cycles = value_periods * cc_freq;
 616
 617         if (!bt_safe_to_mul_uint64(cc_freq, rem_value_in_ns)) {
 618                 ret = -1;
 619                 goto end;
 620         }
 621
 622         if (!bt_safe_to_add_uint64(cc_freq * rem_value_in_ns / NS_PER_S_U,
 623                         value_period_cycles)) {
 624                 ret = -1;
 625                 goto end;
 626         }
 627
 628         *raw_value = cc_freq * rem_value_in_ns / NS_PER_S_U +
 629                 value_period_cycles;
 630
 631 end:
 632         return ret;
 633 }
 634
 635 static inline
 636 enum bt_self_message_iterator_status bt_common_message_iterator_status_to_self(
 637                 enum bt_message_iterator_status status)
 638 {
 639         return (int) status;
 640 }
 641 #endif /* BABELTRACE_COMMON_INTERNAL_H */