11 #include <linux/list.h>
12 #include <linux/kernel.h>
13 #include <linux/bitops.h>
15 #include <sys/types.h>
16 #include <sys/utsname.h>
24 #include "trace-event.h"
34 #include <api/fs/fs.h>
37 #include "sane_ctype.h"
41 * must be a numerical value to let the endianness
42 * determine the memory layout. That way we are able
43 * to detect endianness when reading the perf.data file
46 * we check for legacy (PERFFILE) format.
48 static const char *__perf_magic1 = "PERFFILE";
49 static const u64 __perf_magic2 = 0x32454c4946524550ULL;
50 static const u64 __perf_magic2_sw = 0x50455246494c4532ULL;
52 #define PERF_MAGIC __perf_magic2
54 const char perf_version_string[] = PERF_VERSION;
56 struct perf_file_attr {
57 struct perf_event_attr attr;
58 struct perf_file_section ids;
61 void perf_header__set_feat(struct perf_header *header, int feat)
63 set_bit(feat, header->adds_features);
66 void perf_header__clear_feat(struct perf_header *header, int feat)
68 clear_bit(feat, header->adds_features);
71 bool perf_header__has_feat(const struct perf_header *header, int feat)
73 return test_bit(feat, header->adds_features);
76 static int do_write(int fd, const void *buf, size_t size)
79 int ret = write(fd, buf, size);
91 int write_padded(int fd, const void *bf, size_t count, size_t count_aligned)
93 static const char zero_buf[NAME_ALIGN];
94 int err = do_write(fd, bf, count);
97 err = do_write(fd, zero_buf, count_aligned - count);
102 #define string_size(str) \
103 (PERF_ALIGN((strlen(str) + 1), NAME_ALIGN) + sizeof(u32))
105 static int do_write_string(int fd, const char *str)
110 olen = strlen(str) + 1;
111 len = PERF_ALIGN(olen, NAME_ALIGN);
113 /* write len, incl. \0 */
114 ret = do_write(fd, &len, sizeof(len));
118 return write_padded(fd, str, olen, len);
121 static char *do_read_string(int fd, struct perf_header *ph)
127 sz = readn(fd, &len, sizeof(len));
128 if (sz < (ssize_t)sizeof(len))
138 ret = readn(fd, buf, len);
139 if (ret == (ssize_t)len) {
141 * strings are padded by zeroes
142 * thus the actual strlen of buf
143 * may be less than len
152 static int write_tracing_data(int fd, struct perf_header *h __maybe_unused,
153 struct perf_evlist *evlist)
155 return read_tracing_data(fd, &evlist->entries);
159 static int write_build_id(int fd, struct perf_header *h,
160 struct perf_evlist *evlist __maybe_unused)
162 struct perf_session *session;
165 session = container_of(h, struct perf_session, header);
167 if (!perf_session__read_build_ids(session, true))
170 err = perf_session__write_buildid_table(session, fd);
172 pr_debug("failed to write buildid table\n");
175 perf_session__cache_build_ids(session);
180 static int write_hostname(int fd, struct perf_header *h __maybe_unused,
181 struct perf_evlist *evlist __maybe_unused)
190 return do_write_string(fd, uts.nodename);
193 static int write_osrelease(int fd, struct perf_header *h __maybe_unused,
194 struct perf_evlist *evlist __maybe_unused)
203 return do_write_string(fd, uts.release);
206 static int write_arch(int fd, struct perf_header *h __maybe_unused,
207 struct perf_evlist *evlist __maybe_unused)
216 return do_write_string(fd, uts.machine);
219 static int write_version(int fd, struct perf_header *h __maybe_unused,
220 struct perf_evlist *evlist __maybe_unused)
222 return do_write_string(fd, perf_version_string);
225 static int __write_cpudesc(int fd, const char *cpuinfo_proc)
230 const char *search = cpuinfo_proc;
237 file = fopen("/proc/cpuinfo", "r");
241 while (getline(&buf, &len, file) > 0) {
242 ret = strncmp(buf, search, strlen(search));
254 p = strchr(buf, ':');
255 if (p && *(p+1) == ' ' && *(p+2))
261 /* squash extra space characters (branding string) */
268 while (*q && isspace(*q))
271 while ((*r++ = *q++));
275 ret = do_write_string(fd, s);
282 static int write_cpudesc(int fd, struct perf_header *h __maybe_unused,
283 struct perf_evlist *evlist __maybe_unused)
286 #define CPUINFO_PROC {"model name", }
288 const char *cpuinfo_procs[] = CPUINFO_PROC;
291 for (i = 0; i < ARRAY_SIZE(cpuinfo_procs); i++) {
293 ret = __write_cpudesc(fd, cpuinfo_procs[i]);
301 static int write_nrcpus(int fd, struct perf_header *h __maybe_unused,
302 struct perf_evlist *evlist __maybe_unused)
308 nrc = cpu__max_present_cpu();
310 nr = sysconf(_SC_NPROCESSORS_ONLN);
314 nra = (u32)(nr & UINT_MAX);
316 ret = do_write(fd, &nrc, sizeof(nrc));
320 return do_write(fd, &nra, sizeof(nra));
323 static int write_event_desc(int fd, struct perf_header *h __maybe_unused,
324 struct perf_evlist *evlist)
326 struct perf_evsel *evsel;
330 nre = evlist->nr_entries;
333 * write number of events
335 ret = do_write(fd, &nre, sizeof(nre));
340 * size of perf_event_attr struct
342 sz = (u32)sizeof(evsel->attr);
343 ret = do_write(fd, &sz, sizeof(sz));
347 evlist__for_each_entry(evlist, evsel) {
348 ret = do_write(fd, &evsel->attr, sz);
352 * write number of unique id per event
353 * there is one id per instance of an event
355 * copy into an nri to be independent of the
359 ret = do_write(fd, &nri, sizeof(nri));
364 * write event string as passed on cmdline
366 ret = do_write_string(fd, perf_evsel__name(evsel));
370 * write unique ids for this event
372 ret = do_write(fd, evsel->id, evsel->ids * sizeof(u64));
379 static int write_cmdline(int fd, struct perf_header *h __maybe_unused,
380 struct perf_evlist *evlist __maybe_unused)
382 char buf[MAXPATHLEN];
386 /* actual path to perf binary */
387 ret = readlink("/proc/self/exe", buf, sizeof(buf) - 1);
391 /* readlink() does not add null termination */
394 /* account for binary path */
395 n = perf_env.nr_cmdline + 1;
397 ret = do_write(fd, &n, sizeof(n));
401 ret = do_write_string(fd, buf);
405 for (i = 0 ; i < perf_env.nr_cmdline; i++) {
406 ret = do_write_string(fd, perf_env.cmdline_argv[i]);
413 #define CORE_SIB_FMT \
414 "/sys/devices/system/cpu/cpu%d/topology/core_siblings_list"
415 #define THRD_SIB_FMT \
416 "/sys/devices/system/cpu/cpu%d/topology/thread_siblings_list"
422 char **core_siblings;
423 char **thread_siblings;
426 static int build_cpu_topo(struct cpu_topo *tp, int cpu)
429 char filename[MAXPATHLEN];
430 char *buf = NULL, *p;
436 sprintf(filename, CORE_SIB_FMT, cpu);
437 fp = fopen(filename, "r");
441 sret = getline(&buf, &len, fp);
446 p = strchr(buf, '\n');
450 for (i = 0; i < tp->core_sib; i++) {
451 if (!strcmp(buf, tp->core_siblings[i]))
454 if (i == tp->core_sib) {
455 tp->core_siblings[i] = buf;
463 sprintf(filename, THRD_SIB_FMT, cpu);
464 fp = fopen(filename, "r");
468 if (getline(&buf, &len, fp) <= 0)
471 p = strchr(buf, '\n');
475 for (i = 0; i < tp->thread_sib; i++) {
476 if (!strcmp(buf, tp->thread_siblings[i]))
479 if (i == tp->thread_sib) {
480 tp->thread_siblings[i] = buf;
492 static void free_cpu_topo(struct cpu_topo *tp)
499 for (i = 0 ; i < tp->core_sib; i++)
500 zfree(&tp->core_siblings[i]);
502 for (i = 0 ; i < tp->thread_sib; i++)
503 zfree(&tp->thread_siblings[i]);
508 static struct cpu_topo *build_cpu_topology(void)
510 struct cpu_topo *tp = NULL;
518 ncpus = cpu__max_present_cpu();
520 /* build online CPU map */
521 map = cpu_map__new(NULL);
523 pr_debug("failed to get system cpumap\n");
527 nr = (u32)(ncpus & UINT_MAX);
529 sz = nr * sizeof(char *);
530 addr = calloc(1, sizeof(*tp) + 2 * sz);
537 tp->core_siblings = addr;
539 tp->thread_siblings = addr;
541 for (i = 0; i < nr; i++) {
542 if (!cpu_map__has(map, i))
545 ret = build_cpu_topo(tp, i);
559 static int write_cpu_topology(int fd, struct perf_header *h __maybe_unused,
560 struct perf_evlist *evlist __maybe_unused)
566 tp = build_cpu_topology();
570 ret = do_write(fd, &tp->core_sib, sizeof(tp->core_sib));
574 for (i = 0; i < tp->core_sib; i++) {
575 ret = do_write_string(fd, tp->core_siblings[i]);
579 ret = do_write(fd, &tp->thread_sib, sizeof(tp->thread_sib));
583 for (i = 0; i < tp->thread_sib; i++) {
584 ret = do_write_string(fd, tp->thread_siblings[i]);
589 ret = perf_env__read_cpu_topology_map(&perf_env);
593 for (j = 0; j < perf_env.nr_cpus_avail; j++) {
594 ret = do_write(fd, &perf_env.cpu[j].core_id,
595 sizeof(perf_env.cpu[j].core_id));
598 ret = do_write(fd, &perf_env.cpu[j].socket_id,
599 sizeof(perf_env.cpu[j].socket_id));
610 static int write_total_mem(int fd, struct perf_header *h __maybe_unused,
611 struct perf_evlist *evlist __maybe_unused)
619 fp = fopen("/proc/meminfo", "r");
623 while (getline(&buf, &len, fp) > 0) {
624 ret = strncmp(buf, "MemTotal:", 9);
629 n = sscanf(buf, "%*s %"PRIu64, &mem);
631 ret = do_write(fd, &mem, sizeof(mem));
639 static int write_topo_node(int fd, int node)
641 char str[MAXPATHLEN];
643 char *buf = NULL, *p;
646 u64 mem_total, mem_free, mem;
649 sprintf(str, "/sys/devices/system/node/node%d/meminfo", node);
650 fp = fopen(str, "r");
654 while (getline(&buf, &len, fp) > 0) {
655 /* skip over invalid lines */
656 if (!strchr(buf, ':'))
658 if (sscanf(buf, "%*s %*d %31s %"PRIu64, field, &mem) != 2)
660 if (!strcmp(field, "MemTotal:"))
662 if (!strcmp(field, "MemFree:"))
669 ret = do_write(fd, &mem_total, sizeof(u64));
673 ret = do_write(fd, &mem_free, sizeof(u64));
678 sprintf(str, "/sys/devices/system/node/node%d/cpulist", node);
680 fp = fopen(str, "r");
684 if (getline(&buf, &len, fp) <= 0)
687 p = strchr(buf, '\n');
691 ret = do_write_string(fd, buf);
699 static int write_numa_topology(int fd, struct perf_header *h __maybe_unused,
700 struct perf_evlist *evlist __maybe_unused)
705 struct cpu_map *node_map = NULL;
710 fp = fopen("/sys/devices/system/node/online", "r");
714 if (getline(&buf, &len, fp) <= 0)
717 c = strchr(buf, '\n');
721 node_map = cpu_map__new(buf);
725 nr = (u32)node_map->nr;
727 ret = do_write(fd, &nr, sizeof(nr));
731 for (i = 0; i < nr; i++) {
732 j = (u32)node_map->map[i];
733 ret = do_write(fd, &j, sizeof(j));
737 ret = write_topo_node(fd, i);
744 cpu_map__put(node_map);
751 * struct pmu_mappings {
760 static int write_pmu_mappings(int fd, struct perf_header *h __maybe_unused,
761 struct perf_evlist *evlist __maybe_unused)
763 struct perf_pmu *pmu = NULL;
764 off_t offset = lseek(fd, 0, SEEK_CUR);
768 /* write real pmu_num later */
769 ret = do_write(fd, &pmu_num, sizeof(pmu_num));
773 while ((pmu = perf_pmu__scan(pmu))) {
778 ret = do_write(fd, &pmu->type, sizeof(pmu->type));
782 ret = do_write_string(fd, pmu->name);
787 if (pwrite(fd, &pmu_num, sizeof(pmu_num), offset) != sizeof(pmu_num)) {
789 lseek(fd, offset, SEEK_SET);
799 * struct group_descs {
801 * struct group_desc {
808 static int write_group_desc(int fd, struct perf_header *h __maybe_unused,
809 struct perf_evlist *evlist)
811 u32 nr_groups = evlist->nr_groups;
812 struct perf_evsel *evsel;
815 ret = do_write(fd, &nr_groups, sizeof(nr_groups));
819 evlist__for_each_entry(evlist, evsel) {
820 if (perf_evsel__is_group_leader(evsel) &&
821 evsel->nr_members > 1) {
822 const char *name = evsel->group_name ?: "{anon_group}";
823 u32 leader_idx = evsel->idx;
824 u32 nr_members = evsel->nr_members;
826 ret = do_write_string(fd, name);
830 ret = do_write(fd, &leader_idx, sizeof(leader_idx));
834 ret = do_write(fd, &nr_members, sizeof(nr_members));
843 * default get_cpuid(): nothing gets recorded
844 * actual implementation must be in arch/$(SRCARCH)/util/header.c
846 int __weak get_cpuid(char *buffer __maybe_unused, size_t sz __maybe_unused)
851 static int write_cpuid(int fd, struct perf_header *h __maybe_unused,
852 struct perf_evlist *evlist __maybe_unused)
857 ret = get_cpuid(buffer, sizeof(buffer));
863 return do_write_string(fd, buffer);
866 static int write_branch_stack(int fd __maybe_unused,
867 struct perf_header *h __maybe_unused,
868 struct perf_evlist *evlist __maybe_unused)
873 static int write_auxtrace(int fd, struct perf_header *h,
874 struct perf_evlist *evlist __maybe_unused)
876 struct perf_session *session;
879 session = container_of(h, struct perf_session, header);
881 err = auxtrace_index__write(fd, &session->auxtrace_index);
883 pr_err("Failed to write auxtrace index\n");
887 static int cpu_cache_level__sort(const void *a, const void *b)
889 struct cpu_cache_level *cache_a = (struct cpu_cache_level *)a;
890 struct cpu_cache_level *cache_b = (struct cpu_cache_level *)b;
892 return cache_a->level - cache_b->level;
895 static bool cpu_cache_level__cmp(struct cpu_cache_level *a, struct cpu_cache_level *b)
897 if (a->level != b->level)
900 if (a->line_size != b->line_size)
903 if (a->sets != b->sets)
906 if (a->ways != b->ways)
909 if (strcmp(a->type, b->type))
912 if (strcmp(a->size, b->size))
915 if (strcmp(a->map, b->map))
921 static int cpu_cache_level__read(struct cpu_cache_level *cache, u32 cpu, u16 level)
923 char path[PATH_MAX], file[PATH_MAX];
927 scnprintf(path, PATH_MAX, "devices/system/cpu/cpu%d/cache/index%d/", cpu, level);
928 scnprintf(file, PATH_MAX, "%s/%s", sysfs__mountpoint(), path);
933 scnprintf(file, PATH_MAX, "%s/level", path);
934 if (sysfs__read_int(file, (int *) &cache->level))
937 scnprintf(file, PATH_MAX, "%s/coherency_line_size", path);
938 if (sysfs__read_int(file, (int *) &cache->line_size))
941 scnprintf(file, PATH_MAX, "%s/number_of_sets", path);
942 if (sysfs__read_int(file, (int *) &cache->sets))
945 scnprintf(file, PATH_MAX, "%s/ways_of_associativity", path);
946 if (sysfs__read_int(file, (int *) &cache->ways))
949 scnprintf(file, PATH_MAX, "%s/type", path);
950 if (sysfs__read_str(file, &cache->type, &len))
953 cache->type[len] = 0;
954 cache->type = rtrim(cache->type);
956 scnprintf(file, PATH_MAX, "%s/size", path);
957 if (sysfs__read_str(file, &cache->size, &len)) {
962 cache->size[len] = 0;
963 cache->size = rtrim(cache->size);
965 scnprintf(file, PATH_MAX, "%s/shared_cpu_list", path);
966 if (sysfs__read_str(file, &cache->map, &len)) {
973 cache->map = rtrim(cache->map);
977 static void cpu_cache_level__fprintf(FILE *out, struct cpu_cache_level *c)
979 fprintf(out, "L%d %-15s %8s [%s]\n", c->level, c->type, c->size, c->map);
982 static int build_caches(struct cpu_cache_level caches[], u32 size, u32 *cntp)
989 ncpus = sysconf(_SC_NPROCESSORS_CONF);
993 nr = (u32)(ncpus & UINT_MAX);
995 for (cpu = 0; cpu < nr; cpu++) {
996 for (level = 0; level < 10; level++) {
997 struct cpu_cache_level c;
1000 err = cpu_cache_level__read(&c, cpu, level);
1007 for (i = 0; i < cnt; i++) {
1008 if (cpu_cache_level__cmp(&c, &caches[i]))
1015 cpu_cache_level__free(&c);
1017 if (WARN_ONCE(cnt == size, "way too many cpu caches.."))
1026 #define MAX_CACHES 2000
1028 static int write_cache(int fd, struct perf_header *h __maybe_unused,
1029 struct perf_evlist *evlist __maybe_unused)
1031 struct cpu_cache_level caches[MAX_CACHES];
1032 u32 cnt = 0, i, version = 1;
1035 ret = build_caches(caches, MAX_CACHES, &cnt);
1039 qsort(&caches, cnt, sizeof(struct cpu_cache_level), cpu_cache_level__sort);
1041 ret = do_write(fd, &version, sizeof(u32));
1045 ret = do_write(fd, &cnt, sizeof(u32));
1049 for (i = 0; i < cnt; i++) {
1050 struct cpu_cache_level *c = &caches[i];
1053 ret = do_write(fd, &c->v, sizeof(u32)); \
1064 ret = do_write_string(fd, (const char *) c->v); \
1075 for (i = 0; i < cnt; i++)
1076 cpu_cache_level__free(&caches[i]);
1080 static int write_stat(int fd __maybe_unused,
1081 struct perf_header *h __maybe_unused,
1082 struct perf_evlist *evlist __maybe_unused)
1087 static void print_hostname(struct perf_header *ph, int fd __maybe_unused,
1090 fprintf(fp, "# hostname : %s\n", ph->env.hostname);
1093 static void print_osrelease(struct perf_header *ph, int fd __maybe_unused,
1096 fprintf(fp, "# os release : %s\n", ph->env.os_release);
1099 static void print_arch(struct perf_header *ph, int fd __maybe_unused, FILE *fp)
1101 fprintf(fp, "# arch : %s\n", ph->env.arch);
1104 static void print_cpudesc(struct perf_header *ph, int fd __maybe_unused,
1107 fprintf(fp, "# cpudesc : %s\n", ph->env.cpu_desc);
1110 static void print_nrcpus(struct perf_header *ph, int fd __maybe_unused,
1113 fprintf(fp, "# nrcpus online : %u\n", ph->env.nr_cpus_online);
1114 fprintf(fp, "# nrcpus avail : %u\n", ph->env.nr_cpus_avail);
1117 static void print_version(struct perf_header *ph, int fd __maybe_unused,
1120 fprintf(fp, "# perf version : %s\n", ph->env.version);
1123 static void print_cmdline(struct perf_header *ph, int fd __maybe_unused,
1128 nr = ph->env.nr_cmdline;
1130 fprintf(fp, "# cmdline : ");
1132 for (i = 0; i < nr; i++)
1133 fprintf(fp, "%s ", ph->env.cmdline_argv[i]);
1137 static void print_cpu_topology(struct perf_header *ph, int fd __maybe_unused,
1142 int cpu_nr = ph->env.nr_cpus_avail;
1144 nr = ph->env.nr_sibling_cores;
1145 str = ph->env.sibling_cores;
1147 for (i = 0; i < nr; i++) {
1148 fprintf(fp, "# sibling cores : %s\n", str);
1149 str += strlen(str) + 1;
1152 nr = ph->env.nr_sibling_threads;
1153 str = ph->env.sibling_threads;
1155 for (i = 0; i < nr; i++) {
1156 fprintf(fp, "# sibling threads : %s\n", str);
1157 str += strlen(str) + 1;
1160 if (ph->env.cpu != NULL) {
1161 for (i = 0; i < cpu_nr; i++)
1162 fprintf(fp, "# CPU %d: Core ID %d, Socket ID %d\n", i,
1163 ph->env.cpu[i].core_id, ph->env.cpu[i].socket_id);
1165 fprintf(fp, "# Core ID and Socket ID information is not available\n");
1168 static void free_event_desc(struct perf_evsel *events)
1170 struct perf_evsel *evsel;
1175 for (evsel = events; evsel->attr.size; evsel++) {
1176 zfree(&evsel->name);
1183 static struct perf_evsel *
1184 read_event_desc(struct perf_header *ph, int fd)
1186 struct perf_evsel *evsel, *events = NULL;
1189 u32 nre, sz, nr, i, j;
1193 /* number of events */
1194 ret = readn(fd, &nre, sizeof(nre));
1195 if (ret != (ssize_t)sizeof(nre))
1199 nre = bswap_32(nre);
1201 ret = readn(fd, &sz, sizeof(sz));
1202 if (ret != (ssize_t)sizeof(sz))
1208 /* buffer to hold on file attr struct */
1213 /* the last event terminates with evsel->attr.size == 0: */
1214 events = calloc(nre + 1, sizeof(*events));
1218 msz = sizeof(evsel->attr);
1222 for (i = 0, evsel = events; i < nre; evsel++, i++) {
1226 * must read entire on-file attr struct to
1227 * sync up with layout.
1229 ret = readn(fd, buf, sz);
1230 if (ret != (ssize_t)sz)
1234 perf_event__attr_swap(buf);
1236 memcpy(&evsel->attr, buf, msz);
1238 ret = readn(fd, &nr, sizeof(nr));
1239 if (ret != (ssize_t)sizeof(nr))
1242 if (ph->needs_swap) {
1244 evsel->needs_swap = true;
1247 evsel->name = do_read_string(fd, ph);
1252 id = calloc(nr, sizeof(*id));
1258 for (j = 0 ; j < nr; j++) {
1259 ret = readn(fd, id, sizeof(*id));
1260 if (ret != (ssize_t)sizeof(*id))
1263 *id = bswap_64(*id);
1271 free_event_desc(events);
1276 static int __desc_attr__fprintf(FILE *fp, const char *name, const char *val,
1277 void *priv __attribute__((unused)))
1279 return fprintf(fp, ", %s = %s", name, val);
1282 static void print_event_desc(struct perf_header *ph, int fd, FILE *fp)
1284 struct perf_evsel *evsel, *events = read_event_desc(ph, fd);
1289 fprintf(fp, "# event desc: not available or unable to read\n");
1293 for (evsel = events; evsel->attr.size; evsel++) {
1294 fprintf(fp, "# event : name = %s, ", evsel->name);
1297 fprintf(fp, ", id = {");
1298 for (j = 0, id = evsel->id; j < evsel->ids; j++, id++) {
1301 fprintf(fp, " %"PRIu64, *id);
1306 perf_event_attr__fprintf(fp, &evsel->attr, __desc_attr__fprintf, NULL);
1311 free_event_desc(events);
1314 static void print_total_mem(struct perf_header *ph, int fd __maybe_unused,
1317 fprintf(fp, "# total memory : %Lu kB\n", ph->env.total_mem);
1320 static void print_numa_topology(struct perf_header *ph, int fd __maybe_unused,
1324 struct numa_node *n;
1326 for (i = 0; i < ph->env.nr_numa_nodes; i++) {
1327 n = &ph->env.numa_nodes[i];
1329 fprintf(fp, "# node%u meminfo : total = %"PRIu64" kB,"
1330 " free = %"PRIu64" kB\n",
1331 n->node, n->mem_total, n->mem_free);
1333 fprintf(fp, "# node%u cpu list : ", n->node);
1334 cpu_map__fprintf(n->map, fp);
1338 static void print_cpuid(struct perf_header *ph, int fd __maybe_unused, FILE *fp)
1340 fprintf(fp, "# cpuid : %s\n", ph->env.cpuid);
1343 static void print_branch_stack(struct perf_header *ph __maybe_unused,
1344 int fd __maybe_unused, FILE *fp)
1346 fprintf(fp, "# contains samples with branch stack\n");
1349 static void print_auxtrace(struct perf_header *ph __maybe_unused,
1350 int fd __maybe_unused, FILE *fp)
1352 fprintf(fp, "# contains AUX area data (e.g. instruction trace)\n");
1355 static void print_stat(struct perf_header *ph __maybe_unused,
1356 int fd __maybe_unused, FILE *fp)
1358 fprintf(fp, "# contains stat data\n");
1361 static void print_cache(struct perf_header *ph __maybe_unused,
1362 int fd __maybe_unused, FILE *fp __maybe_unused)
1366 fprintf(fp, "# CPU cache info:\n");
1367 for (i = 0; i < ph->env.caches_cnt; i++) {
1369 cpu_cache_level__fprintf(fp, &ph->env.caches[i]);
1373 static void print_pmu_mappings(struct perf_header *ph, int fd __maybe_unused,
1376 const char *delimiter = "# pmu mappings: ";
1381 pmu_num = ph->env.nr_pmu_mappings;
1383 fprintf(fp, "# pmu mappings: not available\n");
1387 str = ph->env.pmu_mappings;
1390 type = strtoul(str, &tmp, 0);
1395 fprintf(fp, "%s%s = %" PRIu32, delimiter, str, type);
1398 str += strlen(str) + 1;
1407 fprintf(fp, "# pmu mappings: unable to read\n");
1410 static void print_group_desc(struct perf_header *ph, int fd __maybe_unused,
1413 struct perf_session *session;
1414 struct perf_evsel *evsel;
1417 session = container_of(ph, struct perf_session, header);
1419 evlist__for_each_entry(session->evlist, evsel) {
1420 if (perf_evsel__is_group_leader(evsel) &&
1421 evsel->nr_members > 1) {
1422 fprintf(fp, "# group: %s{%s", evsel->group_name ?: "",
1423 perf_evsel__name(evsel));
1425 nr = evsel->nr_members - 1;
1427 fprintf(fp, ",%s", perf_evsel__name(evsel));
1435 static int __event_process_build_id(struct build_id_event *bev,
1437 struct perf_session *session)
1440 struct machine *machine;
1443 enum dso_kernel_type dso_type;
1445 machine = perf_session__findnew_machine(session, bev->pid);
1449 cpumode = bev->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
1452 case PERF_RECORD_MISC_KERNEL:
1453 dso_type = DSO_TYPE_KERNEL;
1455 case PERF_RECORD_MISC_GUEST_KERNEL:
1456 dso_type = DSO_TYPE_GUEST_KERNEL;
1458 case PERF_RECORD_MISC_USER:
1459 case PERF_RECORD_MISC_GUEST_USER:
1460 dso_type = DSO_TYPE_USER;
1466 dso = machine__findnew_dso(machine, filename);
1468 char sbuild_id[SBUILD_ID_SIZE];
1470 dso__set_build_id(dso, &bev->build_id);
1472 if (dso_type != DSO_TYPE_USER) {
1473 struct kmod_path m = { .name = NULL, };
1475 if (!kmod_path__parse_name(&m, filename) && m.kmod)
1476 dso__set_module_info(dso, &m, machine);
1478 dso->kernel = dso_type;
1483 build_id__sprintf(dso->build_id, sizeof(dso->build_id),
1485 pr_debug("build id event received for %s: %s\n",
1486 dso->long_name, sbuild_id);
1495 static int perf_header__read_build_ids_abi_quirk(struct perf_header *header,
1496 int input, u64 offset, u64 size)
1498 struct perf_session *session = container_of(header, struct perf_session, header);
1500 struct perf_event_header header;
1501 u8 build_id[PERF_ALIGN(BUILD_ID_SIZE, sizeof(u64))];
1504 struct build_id_event bev;
1505 char filename[PATH_MAX];
1506 u64 limit = offset + size;
1508 while (offset < limit) {
1511 if (readn(input, &old_bev, sizeof(old_bev)) != sizeof(old_bev))
1514 if (header->needs_swap)
1515 perf_event_header__bswap(&old_bev.header);
1517 len = old_bev.header.size - sizeof(old_bev);
1518 if (readn(input, filename, len) != len)
1521 bev.header = old_bev.header;
1524 * As the pid is the missing value, we need to fill
1525 * it properly. The header.misc value give us nice hint.
1527 bev.pid = HOST_KERNEL_ID;
1528 if (bev.header.misc == PERF_RECORD_MISC_GUEST_USER ||
1529 bev.header.misc == PERF_RECORD_MISC_GUEST_KERNEL)
1530 bev.pid = DEFAULT_GUEST_KERNEL_ID;
1532 memcpy(bev.build_id, old_bev.build_id, sizeof(bev.build_id));
1533 __event_process_build_id(&bev, filename, session);
1535 offset += bev.header.size;
1541 static int perf_header__read_build_ids(struct perf_header *header,
1542 int input, u64 offset, u64 size)
1544 struct perf_session *session = container_of(header, struct perf_session, header);
1545 struct build_id_event bev;
1546 char filename[PATH_MAX];
1547 u64 limit = offset + size, orig_offset = offset;
1550 while (offset < limit) {
1553 if (readn(input, &bev, sizeof(bev)) != sizeof(bev))
1556 if (header->needs_swap)
1557 perf_event_header__bswap(&bev.header);
1559 len = bev.header.size - sizeof(bev);
1560 if (readn(input, filename, len) != len)
1563 * The a1645ce1 changeset:
1565 * "perf: 'perf kvm' tool for monitoring guest performance from host"
1567 * Added a field to struct build_id_event that broke the file
1570 * Since the kernel build-id is the first entry, process the
1571 * table using the old format if the well known
1572 * '[kernel.kallsyms]' string for the kernel build-id has the
1573 * first 4 characters chopped off (where the pid_t sits).
1575 if (memcmp(filename, "nel.kallsyms]", 13) == 0) {
1576 if (lseek(input, orig_offset, SEEK_SET) == (off_t)-1)
1578 return perf_header__read_build_ids_abi_quirk(header, input, offset, size);
1581 __event_process_build_id(&bev, filename, session);
1583 offset += bev.header.size;
1590 static int process_tracing_data(struct perf_file_section *section __maybe_unused,
1591 struct perf_header *ph __maybe_unused,
1594 ssize_t ret = trace_report(fd, data, false);
1595 return ret < 0 ? -1 : 0;
1598 static int process_build_id(struct perf_file_section *section,
1599 struct perf_header *ph, int fd,
1600 void *data __maybe_unused)
1602 if (perf_header__read_build_ids(ph, fd, section->offset, section->size))
1603 pr_debug("Failed to read buildids, continuing...\n");
1607 static int process_hostname(struct perf_file_section *section __maybe_unused,
1608 struct perf_header *ph, int fd,
1609 void *data __maybe_unused)
1611 ph->env.hostname = do_read_string(fd, ph);
1612 return ph->env.hostname ? 0 : -ENOMEM;
1615 static int process_osrelease(struct perf_file_section *section __maybe_unused,
1616 struct perf_header *ph, int fd,
1617 void *data __maybe_unused)
1619 ph->env.os_release = do_read_string(fd, ph);
1620 return ph->env.os_release ? 0 : -ENOMEM;
1623 static int process_version(struct perf_file_section *section __maybe_unused,
1624 struct perf_header *ph, int fd,
1625 void *data __maybe_unused)
1627 ph->env.version = do_read_string(fd, ph);
1628 return ph->env.version ? 0 : -ENOMEM;
1631 static int process_arch(struct perf_file_section *section __maybe_unused,
1632 struct perf_header *ph, int fd,
1633 void *data __maybe_unused)
1635 ph->env.arch = do_read_string(fd, ph);
1636 return ph->env.arch ? 0 : -ENOMEM;
1639 static int process_nrcpus(struct perf_file_section *section __maybe_unused,
1640 struct perf_header *ph, int fd,
1641 void *data __maybe_unused)
1646 ret = readn(fd, &nr, sizeof(nr));
1647 if (ret != sizeof(nr))
1653 ph->env.nr_cpus_avail = nr;
1655 ret = readn(fd, &nr, sizeof(nr));
1656 if (ret != sizeof(nr))
1662 ph->env.nr_cpus_online = nr;
1666 static int process_cpudesc(struct perf_file_section *section __maybe_unused,
1667 struct perf_header *ph, int fd,
1668 void *data __maybe_unused)
1670 ph->env.cpu_desc = do_read_string(fd, ph);
1671 return ph->env.cpu_desc ? 0 : -ENOMEM;
1674 static int process_cpuid(struct perf_file_section *section __maybe_unused,
1675 struct perf_header *ph, int fd,
1676 void *data __maybe_unused)
1678 ph->env.cpuid = do_read_string(fd, ph);
1679 return ph->env.cpuid ? 0 : -ENOMEM;
1682 static int process_total_mem(struct perf_file_section *section __maybe_unused,
1683 struct perf_header *ph, int fd,
1684 void *data __maybe_unused)
1689 ret = readn(fd, &mem, sizeof(mem));
1690 if (ret != sizeof(mem))
1694 mem = bswap_64(mem);
1696 ph->env.total_mem = mem;
1700 static struct perf_evsel *
1701 perf_evlist__find_by_index(struct perf_evlist *evlist, int idx)
1703 struct perf_evsel *evsel;
1705 evlist__for_each_entry(evlist, evsel) {
1706 if (evsel->idx == idx)
1714 perf_evlist__set_event_name(struct perf_evlist *evlist,
1715 struct perf_evsel *event)
1717 struct perf_evsel *evsel;
1722 evsel = perf_evlist__find_by_index(evlist, event->idx);
1729 evsel->name = strdup(event->name);
1733 process_event_desc(struct perf_file_section *section __maybe_unused,
1734 struct perf_header *header, int fd,
1735 void *data __maybe_unused)
1737 struct perf_session *session;
1738 struct perf_evsel *evsel, *events = read_event_desc(header, fd);
1743 session = container_of(header, struct perf_session, header);
1744 for (evsel = events; evsel->attr.size; evsel++)
1745 perf_evlist__set_event_name(session->evlist, evsel);
1747 free_event_desc(events);
1752 static int process_cmdline(struct perf_file_section *section,
1753 struct perf_header *ph, int fd,
1754 void *data __maybe_unused)
1757 char *str, *cmdline = NULL, **argv = NULL;
1760 ret = readn(fd, &nr, sizeof(nr));
1761 if (ret != sizeof(nr))
1767 ph->env.nr_cmdline = nr;
1769 cmdline = zalloc(section->size + nr + 1);
1773 argv = zalloc(sizeof(char *) * (nr + 1));
1777 for (i = 0; i < nr; i++) {
1778 str = do_read_string(fd, ph);
1782 argv[i] = cmdline + len;
1783 memcpy(argv[i], str, strlen(str) + 1);
1784 len += strlen(str) + 1;
1787 ph->env.cmdline = cmdline;
1788 ph->env.cmdline_argv = (const char **) argv;
1797 static int process_cpu_topology(struct perf_file_section *section,
1798 struct perf_header *ph, int fd,
1799 void *data __maybe_unused)
1805 int cpu_nr = ph->env.nr_cpus_avail;
1808 ph->env.cpu = calloc(cpu_nr, sizeof(*ph->env.cpu));
1812 ret = readn(fd, &nr, sizeof(nr));
1813 if (ret != sizeof(nr))
1819 ph->env.nr_sibling_cores = nr;
1820 size += sizeof(u32);
1821 if (strbuf_init(&sb, 128) < 0)
1824 for (i = 0; i < nr; i++) {
1825 str = do_read_string(fd, ph);
1829 /* include a NULL character at the end */
1830 if (strbuf_add(&sb, str, strlen(str) + 1) < 0)
1832 size += string_size(str);
1835 ph->env.sibling_cores = strbuf_detach(&sb, NULL);
1837 ret = readn(fd, &nr, sizeof(nr));
1838 if (ret != sizeof(nr))
1844 ph->env.nr_sibling_threads = nr;
1845 size += sizeof(u32);
1847 for (i = 0; i < nr; i++) {
1848 str = do_read_string(fd, ph);
1852 /* include a NULL character at the end */
1853 if (strbuf_add(&sb, str, strlen(str) + 1) < 0)
1855 size += string_size(str);
1858 ph->env.sibling_threads = strbuf_detach(&sb, NULL);
1861 * The header may be from old perf,
1862 * which doesn't include core id and socket id information.
1864 if (section->size <= size) {
1865 zfree(&ph->env.cpu);
1869 for (i = 0; i < (u32)cpu_nr; i++) {
1870 ret = readn(fd, &nr, sizeof(nr));
1871 if (ret != sizeof(nr))
1877 ph->env.cpu[i].core_id = nr;
1879 ret = readn(fd, &nr, sizeof(nr));
1880 if (ret != sizeof(nr))
1886 if (nr != (u32)-1 && nr > (u32)cpu_nr) {
1887 pr_debug("socket_id number is too big."
1888 "You may need to upgrade the perf tool.\n");
1892 ph->env.cpu[i].socket_id = nr;
1898 strbuf_release(&sb);
1900 zfree(&ph->env.cpu);
1904 static int process_numa_topology(struct perf_file_section *section __maybe_unused,
1905 struct perf_header *ph, int fd,
1906 void *data __maybe_unused)
1908 struct numa_node *nodes, *n;
1914 ret = readn(fd, &nr, sizeof(nr));
1915 if (ret != sizeof(nr))
1921 nodes = zalloc(sizeof(*nodes) * nr);
1925 for (i = 0; i < nr; i++) {
1929 ret = readn(fd, &n->node, sizeof(u32));
1930 if (ret != sizeof(n->node))
1933 ret = readn(fd, &n->mem_total, sizeof(u64));
1934 if (ret != sizeof(u64))
1937 ret = readn(fd, &n->mem_free, sizeof(u64));
1938 if (ret != sizeof(u64))
1941 if (ph->needs_swap) {
1942 n->node = bswap_32(n->node);
1943 n->mem_total = bswap_64(n->mem_total);
1944 n->mem_free = bswap_64(n->mem_free);
1947 str = do_read_string(fd, ph);
1951 n->map = cpu_map__new(str);
1957 ph->env.nr_numa_nodes = nr;
1958 ph->env.numa_nodes = nodes;
1966 static int process_pmu_mappings(struct perf_file_section *section __maybe_unused,
1967 struct perf_header *ph, int fd,
1968 void *data __maybe_unused)
1976 ret = readn(fd, &pmu_num, sizeof(pmu_num));
1977 if (ret != sizeof(pmu_num))
1981 pmu_num = bswap_32(pmu_num);
1984 pr_debug("pmu mappings not available\n");
1988 ph->env.nr_pmu_mappings = pmu_num;
1989 if (strbuf_init(&sb, 128) < 0)
1993 if (readn(fd, &type, sizeof(type)) != sizeof(type))
1996 type = bswap_32(type);
1998 name = do_read_string(fd, ph);
2002 if (strbuf_addf(&sb, "%u:%s", type, name) < 0)
2004 /* include a NULL character at the end */
2005 if (strbuf_add(&sb, "", 1) < 0)
2008 if (!strcmp(name, "msr"))
2009 ph->env.msr_pmu_type = type;
2014 ph->env.pmu_mappings = strbuf_detach(&sb, NULL);
2018 strbuf_release(&sb);
2022 static int process_group_desc(struct perf_file_section *section __maybe_unused,
2023 struct perf_header *ph, int fd,
2024 void *data __maybe_unused)
2027 u32 i, nr, nr_groups;
2028 struct perf_session *session;
2029 struct perf_evsel *evsel, *leader = NULL;
2036 if (readn(fd, &nr_groups, sizeof(nr_groups)) != sizeof(nr_groups))
2040 nr_groups = bswap_32(nr_groups);
2042 ph->env.nr_groups = nr_groups;
2044 pr_debug("group desc not available\n");
2048 desc = calloc(nr_groups, sizeof(*desc));
2052 for (i = 0; i < nr_groups; i++) {
2053 desc[i].name = do_read_string(fd, ph);
2057 if (readn(fd, &desc[i].leader_idx, sizeof(u32)) != sizeof(u32))
2060 if (readn(fd, &desc[i].nr_members, sizeof(u32)) != sizeof(u32))
2063 if (ph->needs_swap) {
2064 desc[i].leader_idx = bswap_32(desc[i].leader_idx);
2065 desc[i].nr_members = bswap_32(desc[i].nr_members);
2070 * Rebuild group relationship based on the group_desc
2072 session = container_of(ph, struct perf_session, header);
2073 session->evlist->nr_groups = nr_groups;
2076 evlist__for_each_entry(session->evlist, evsel) {
2077 if (evsel->idx == (int) desc[i].leader_idx) {
2078 evsel->leader = evsel;
2079 /* {anon_group} is a dummy name */
2080 if (strcmp(desc[i].name, "{anon_group}")) {
2081 evsel->group_name = desc[i].name;
2082 desc[i].name = NULL;
2084 evsel->nr_members = desc[i].nr_members;
2086 if (i >= nr_groups || nr > 0) {
2087 pr_debug("invalid group desc\n");
2092 nr = evsel->nr_members - 1;
2095 /* This is a group member */
2096 evsel->leader = leader;
2102 if (i != nr_groups || nr != 0) {
2103 pr_debug("invalid group desc\n");
2109 for (i = 0; i < nr_groups; i++)
2110 zfree(&desc[i].name);
2116 static int process_auxtrace(struct perf_file_section *section,
2117 struct perf_header *ph, int fd,
2118 void *data __maybe_unused)
2120 struct perf_session *session;
2123 session = container_of(ph, struct perf_session, header);
2125 err = auxtrace_index__process(fd, section->size, session,
2128 pr_err("Failed to process auxtrace index\n");
2132 static int process_cache(struct perf_file_section *section __maybe_unused,
2133 struct perf_header *ph __maybe_unused, int fd __maybe_unused,
2134 void *data __maybe_unused)
2136 struct cpu_cache_level *caches;
2137 u32 cnt, i, version;
2139 if (readn(fd, &version, sizeof(version)) != sizeof(version))
2143 version = bswap_32(version);
2148 if (readn(fd, &cnt, sizeof(cnt)) != sizeof(cnt))
2152 cnt = bswap_32(cnt);
2154 caches = zalloc(sizeof(*caches) * cnt);
2158 for (i = 0; i < cnt; i++) {
2159 struct cpu_cache_level c;
2162 if (readn(fd, &c.v, sizeof(u32)) != sizeof(u32))\
2163 goto out_free_caches; \
2164 if (ph->needs_swap) \
2165 c.v = bswap_32(c.v); \
2174 c.v = do_read_string(fd, ph); \
2176 goto out_free_caches;
2186 ph->env.caches = caches;
2187 ph->env.caches_cnt = cnt;
2194 struct feature_ops {
2195 int (*write)(int fd, struct perf_header *h, struct perf_evlist *evlist);
2196 void (*print)(struct perf_header *h, int fd, FILE *fp);
2197 int (*process)(struct perf_file_section *section,
2198 struct perf_header *h, int fd, void *data);
2203 #define FEAT_OPA(n, func) \
2204 [n] = { .name = #n, .write = write_##func, .print = print_##func }
2205 #define FEAT_OPP(n, func) \
2206 [n] = { .name = #n, .write = write_##func, .print = print_##func, \
2207 .process = process_##func }
2208 #define FEAT_OPF(n, func) \
2209 [n] = { .name = #n, .write = write_##func, .print = print_##func, \
2210 .process = process_##func, .full_only = true }
2212 /* feature_ops not implemented: */
2213 #define print_tracing_data NULL
2214 #define print_build_id NULL
2216 static const struct feature_ops feat_ops[HEADER_LAST_FEATURE] = {
2217 FEAT_OPP(HEADER_TRACING_DATA, tracing_data),
2218 FEAT_OPP(HEADER_BUILD_ID, build_id),
2219 FEAT_OPP(HEADER_HOSTNAME, hostname),
2220 FEAT_OPP(HEADER_OSRELEASE, osrelease),
2221 FEAT_OPP(HEADER_VERSION, version),
2222 FEAT_OPP(HEADER_ARCH, arch),
2223 FEAT_OPP(HEADER_NRCPUS, nrcpus),
2224 FEAT_OPP(HEADER_CPUDESC, cpudesc),
2225 FEAT_OPP(HEADER_CPUID, cpuid),
2226 FEAT_OPP(HEADER_TOTAL_MEM, total_mem),
2227 FEAT_OPP(HEADER_EVENT_DESC, event_desc),
2228 FEAT_OPP(HEADER_CMDLINE, cmdline),
2229 FEAT_OPF(HEADER_CPU_TOPOLOGY, cpu_topology),
2230 FEAT_OPF(HEADER_NUMA_TOPOLOGY, numa_topology),
2231 FEAT_OPA(HEADER_BRANCH_STACK, branch_stack),
2232 FEAT_OPP(HEADER_PMU_MAPPINGS, pmu_mappings),
2233 FEAT_OPP(HEADER_GROUP_DESC, group_desc),
2234 FEAT_OPP(HEADER_AUXTRACE, auxtrace),
2235 FEAT_OPA(HEADER_STAT, stat),
2236 FEAT_OPF(HEADER_CACHE, cache),
2239 struct header_print_data {
2241 bool full; /* extended list of headers */
2244 static int perf_file_section__fprintf_info(struct perf_file_section *section,
2245 struct perf_header *ph,
2246 int feat, int fd, void *data)
2248 struct header_print_data *hd = data;
2250 if (lseek(fd, section->offset, SEEK_SET) == (off_t)-1) {
2251 pr_debug("Failed to lseek to %" PRIu64 " offset for feature "
2252 "%d, continuing...\n", section->offset, feat);
2255 if (feat >= HEADER_LAST_FEATURE) {
2256 pr_warning("unknown feature %d\n", feat);
2259 if (!feat_ops[feat].print)
2262 if (!feat_ops[feat].full_only || hd->full)
2263 feat_ops[feat].print(ph, fd, hd->fp);
2265 fprintf(hd->fp, "# %s info available, use -I to display\n",
2266 feat_ops[feat].name);
2271 int perf_header__fprintf_info(struct perf_session *session, FILE *fp, bool full)
2273 struct header_print_data hd;
2274 struct perf_header *header = &session->header;
2275 int fd = perf_data_file__fd(session->file);
2282 ret = fstat(fd, &st);
2286 fprintf(fp, "# captured on: %s", ctime(&st.st_ctime));
2288 perf_header__process_sections(header, fd, &hd,
2289 perf_file_section__fprintf_info);
2291 if (session->file->is_pipe)
2294 fprintf(fp, "# missing features: ");
2295 for_each_clear_bit(bit, header->adds_features, HEADER_LAST_FEATURE) {
2297 fprintf(fp, "%s ", feat_ops[bit].name);
2304 static int do_write_feat(int fd, struct perf_header *h, int type,
2305 struct perf_file_section **p,
2306 struct perf_evlist *evlist)
2311 if (perf_header__has_feat(h, type)) {
2312 if (!feat_ops[type].write)
2315 (*p)->offset = lseek(fd, 0, SEEK_CUR);
2317 err = feat_ops[type].write(fd, h, evlist);
2319 pr_debug("failed to write feature %s\n", feat_ops[type].name);
2321 /* undo anything written */
2322 lseek(fd, (*p)->offset, SEEK_SET);
2326 (*p)->size = lseek(fd, 0, SEEK_CUR) - (*p)->offset;
2332 static int perf_header__adds_write(struct perf_header *header,
2333 struct perf_evlist *evlist, int fd)
2336 struct perf_file_section *feat_sec, *p;
2342 nr_sections = bitmap_weight(header->adds_features, HEADER_FEAT_BITS);
2346 feat_sec = p = calloc(nr_sections, sizeof(*feat_sec));
2347 if (feat_sec == NULL)
2350 sec_size = sizeof(*feat_sec) * nr_sections;
2352 sec_start = header->feat_offset;
2353 lseek(fd, sec_start + sec_size, SEEK_SET);
2355 for_each_set_bit(feat, header->adds_features, HEADER_FEAT_BITS) {
2356 if (do_write_feat(fd, header, feat, &p, evlist))
2357 perf_header__clear_feat(header, feat);
2360 lseek(fd, sec_start, SEEK_SET);
2362 * may write more than needed due to dropped feature, but
2363 * this is okay, reader will skip the mising entries
2365 err = do_write(fd, feat_sec, sec_size);
2367 pr_debug("failed to write feature section\n");
2372 int perf_header__write_pipe(int fd)
2374 struct perf_pipe_file_header f_header;
2377 f_header = (struct perf_pipe_file_header){
2378 .magic = PERF_MAGIC,
2379 .size = sizeof(f_header),
2382 err = do_write(fd, &f_header, sizeof(f_header));
2384 pr_debug("failed to write perf pipe header\n");
2391 int perf_session__write_header(struct perf_session *session,
2392 struct perf_evlist *evlist,
2393 int fd, bool at_exit)
2395 struct perf_file_header f_header;
2396 struct perf_file_attr f_attr;
2397 struct perf_header *header = &session->header;
2398 struct perf_evsel *evsel;
2402 lseek(fd, sizeof(f_header), SEEK_SET);
2404 evlist__for_each_entry(session->evlist, evsel) {
2405 evsel->id_offset = lseek(fd, 0, SEEK_CUR);
2406 err = do_write(fd, evsel->id, evsel->ids * sizeof(u64));
2408 pr_debug("failed to write perf header\n");
2413 attr_offset = lseek(fd, 0, SEEK_CUR);
2415 evlist__for_each_entry(evlist, evsel) {
2416 f_attr = (struct perf_file_attr){
2417 .attr = evsel->attr,
2419 .offset = evsel->id_offset,
2420 .size = evsel->ids * sizeof(u64),
2423 err = do_write(fd, &f_attr, sizeof(f_attr));
2425 pr_debug("failed to write perf header attribute\n");
2430 if (!header->data_offset)
2431 header->data_offset = lseek(fd, 0, SEEK_CUR);
2432 header->feat_offset = header->data_offset + header->data_size;
2435 err = perf_header__adds_write(header, evlist, fd);
2440 f_header = (struct perf_file_header){
2441 .magic = PERF_MAGIC,
2442 .size = sizeof(f_header),
2443 .attr_size = sizeof(f_attr),
2445 .offset = attr_offset,
2446 .size = evlist->nr_entries * sizeof(f_attr),
2449 .offset = header->data_offset,
2450 .size = header->data_size,
2452 /* event_types is ignored, store zeros */
2455 memcpy(&f_header.adds_features, &header->adds_features, sizeof(header->adds_features));
2457 lseek(fd, 0, SEEK_SET);
2458 err = do_write(fd, &f_header, sizeof(f_header));
2460 pr_debug("failed to write perf header\n");
2463 lseek(fd, header->data_offset + header->data_size, SEEK_SET);
2468 static int perf_header__getbuffer64(struct perf_header *header,
2469 int fd, void *buf, size_t size)
2471 if (readn(fd, buf, size) <= 0)
2474 if (header->needs_swap)
2475 mem_bswap_64(buf, size);
2480 int perf_header__process_sections(struct perf_header *header, int fd,
2482 int (*process)(struct perf_file_section *section,
2483 struct perf_header *ph,
2484 int feat, int fd, void *data))
2486 struct perf_file_section *feat_sec, *sec;
2492 nr_sections = bitmap_weight(header->adds_features, HEADER_FEAT_BITS);
2496 feat_sec = sec = calloc(nr_sections, sizeof(*feat_sec));
2500 sec_size = sizeof(*feat_sec) * nr_sections;
2502 lseek(fd, header->feat_offset, SEEK_SET);
2504 err = perf_header__getbuffer64(header, fd, feat_sec, sec_size);
2508 for_each_set_bit(feat, header->adds_features, HEADER_LAST_FEATURE) {
2509 err = process(sec++, header, feat, fd, data);
2519 static const int attr_file_abi_sizes[] = {
2520 [0] = PERF_ATTR_SIZE_VER0,
2521 [1] = PERF_ATTR_SIZE_VER1,
2522 [2] = PERF_ATTR_SIZE_VER2,
2523 [3] = PERF_ATTR_SIZE_VER3,
2524 [4] = PERF_ATTR_SIZE_VER4,
2529 * In the legacy file format, the magic number is not used to encode endianness.
2530 * hdr_sz was used to encode endianness. But given that hdr_sz can vary based
2531 * on ABI revisions, we need to try all combinations for all endianness to
2532 * detect the endianness.
2534 static int try_all_file_abis(uint64_t hdr_sz, struct perf_header *ph)
2536 uint64_t ref_size, attr_size;
2539 for (i = 0 ; attr_file_abi_sizes[i]; i++) {
2540 ref_size = attr_file_abi_sizes[i]
2541 + sizeof(struct perf_file_section);
2542 if (hdr_sz != ref_size) {
2543 attr_size = bswap_64(hdr_sz);
2544 if (attr_size != ref_size)
2547 ph->needs_swap = true;
2549 pr_debug("ABI%d perf.data file detected, need_swap=%d\n",
2554 /* could not determine endianness */
2558 #define PERF_PIPE_HDR_VER0 16
2560 static const size_t attr_pipe_abi_sizes[] = {
2561 [0] = PERF_PIPE_HDR_VER0,
2566 * In the legacy pipe format, there is an implicit assumption that endiannesss
2567 * between host recording the samples, and host parsing the samples is the
2568 * same. This is not always the case given that the pipe output may always be
2569 * redirected into a file and analyzed on a different machine with possibly a
2570 * different endianness and perf_event ABI revsions in the perf tool itself.
2572 static int try_all_pipe_abis(uint64_t hdr_sz, struct perf_header *ph)
2577 for (i = 0 ; attr_pipe_abi_sizes[i]; i++) {
2578 if (hdr_sz != attr_pipe_abi_sizes[i]) {
2579 attr_size = bswap_64(hdr_sz);
2580 if (attr_size != hdr_sz)
2583 ph->needs_swap = true;
2585 pr_debug("Pipe ABI%d perf.data file detected\n", i);
2591 bool is_perf_magic(u64 magic)
2593 if (!memcmp(&magic, __perf_magic1, sizeof(magic))
2594 || magic == __perf_magic2
2595 || magic == __perf_magic2_sw)
2601 static int check_magic_endian(u64 magic, uint64_t hdr_sz,
2602 bool is_pipe, struct perf_header *ph)
2606 /* check for legacy format */
2607 ret = memcmp(&magic, __perf_magic1, sizeof(magic));
2609 ph->version = PERF_HEADER_VERSION_1;
2610 pr_debug("legacy perf.data format\n");
2612 return try_all_pipe_abis(hdr_sz, ph);
2614 return try_all_file_abis(hdr_sz, ph);
2617 * the new magic number serves two purposes:
2618 * - unique number to identify actual perf.data files
2619 * - encode endianness of file
2621 ph->version = PERF_HEADER_VERSION_2;
2623 /* check magic number with one endianness */
2624 if (magic == __perf_magic2)
2627 /* check magic number with opposite endianness */
2628 if (magic != __perf_magic2_sw)
2631 ph->needs_swap = true;
2636 int perf_file_header__read(struct perf_file_header *header,
2637 struct perf_header *ph, int fd)
2641 lseek(fd, 0, SEEK_SET);
2643 ret = readn(fd, header, sizeof(*header));
2647 if (check_magic_endian(header->magic,
2648 header->attr_size, false, ph) < 0) {
2649 pr_debug("magic/endian check failed\n");
2653 if (ph->needs_swap) {
2654 mem_bswap_64(header, offsetof(struct perf_file_header,
2658 if (header->size != sizeof(*header)) {
2659 /* Support the previous format */
2660 if (header->size == offsetof(typeof(*header), adds_features))
2661 bitmap_zero(header->adds_features, HEADER_FEAT_BITS);
2664 } else if (ph->needs_swap) {
2666 * feature bitmap is declared as an array of unsigned longs --
2667 * not good since its size can differ between the host that
2668 * generated the data file and the host analyzing the file.
2670 * We need to handle endianness, but we don't know the size of
2671 * the unsigned long where the file was generated. Take a best
2672 * guess at determining it: try 64-bit swap first (ie., file
2673 * created on a 64-bit host), and check if the hostname feature
2674 * bit is set (this feature bit is forced on as of fbe96f2).
2675 * If the bit is not, undo the 64-bit swap and try a 32-bit
2676 * swap. If the hostname bit is still not set (e.g., older data
2677 * file), punt and fallback to the original behavior --
2678 * clearing all feature bits and setting buildid.
2680 mem_bswap_64(&header->adds_features,
2681 BITS_TO_U64(HEADER_FEAT_BITS));
2683 if (!test_bit(HEADER_HOSTNAME, header->adds_features)) {
2685 mem_bswap_64(&header->adds_features,
2686 BITS_TO_U64(HEADER_FEAT_BITS));
2689 mem_bswap_32(&header->adds_features,
2690 BITS_TO_U32(HEADER_FEAT_BITS));
2693 if (!test_bit(HEADER_HOSTNAME, header->adds_features)) {
2694 bitmap_zero(header->adds_features, HEADER_FEAT_BITS);
2695 set_bit(HEADER_BUILD_ID, header->adds_features);
2699 memcpy(&ph->adds_features, &header->adds_features,
2700 sizeof(ph->adds_features));
2702 ph->data_offset = header->data.offset;
2703 ph->data_size = header->data.size;
2704 ph->feat_offset = header->data.offset + header->data.size;
2708 static int perf_file_section__process(struct perf_file_section *section,
2709 struct perf_header *ph,
2710 int feat, int fd, void *data)
2712 if (lseek(fd, section->offset, SEEK_SET) == (off_t)-1) {
2713 pr_debug("Failed to lseek to %" PRIu64 " offset for feature "
2714 "%d, continuing...\n", section->offset, feat);
2718 if (feat >= HEADER_LAST_FEATURE) {
2719 pr_debug("unknown feature %d, continuing...\n", feat);
2723 if (!feat_ops[feat].process)
2726 return feat_ops[feat].process(section, ph, fd, data);
2729 static int perf_file_header__read_pipe(struct perf_pipe_file_header *header,
2730 struct perf_header *ph, int fd,
2735 ret = readn(fd, header, sizeof(*header));
2739 if (check_magic_endian(header->magic, header->size, true, ph) < 0) {
2740 pr_debug("endian/magic failed\n");
2745 header->size = bswap_64(header->size);
2747 if (repipe && do_write(STDOUT_FILENO, header, sizeof(*header)) < 0)
2753 static int perf_header__read_pipe(struct perf_session *session)
2755 struct perf_header *header = &session->header;
2756 struct perf_pipe_file_header f_header;
2758 if (perf_file_header__read_pipe(&f_header, header,
2759 perf_data_file__fd(session->file),
2760 session->repipe) < 0) {
2761 pr_debug("incompatible file format\n");
2768 static int read_attr(int fd, struct perf_header *ph,
2769 struct perf_file_attr *f_attr)
2771 struct perf_event_attr *attr = &f_attr->attr;
2773 size_t our_sz = sizeof(f_attr->attr);
2776 memset(f_attr, 0, sizeof(*f_attr));
2778 /* read minimal guaranteed structure */
2779 ret = readn(fd, attr, PERF_ATTR_SIZE_VER0);
2781 pr_debug("cannot read %d bytes of header attr\n",
2782 PERF_ATTR_SIZE_VER0);
2786 /* on file perf_event_attr size */
2794 sz = PERF_ATTR_SIZE_VER0;
2795 } else if (sz > our_sz) {
2796 pr_debug("file uses a more recent and unsupported ABI"
2797 " (%zu bytes extra)\n", sz - our_sz);
2800 /* what we have not yet read and that we know about */
2801 left = sz - PERF_ATTR_SIZE_VER0;
2804 ptr += PERF_ATTR_SIZE_VER0;
2806 ret = readn(fd, ptr, left);
2808 /* read perf_file_section, ids are read in caller */
2809 ret = readn(fd, &f_attr->ids, sizeof(f_attr->ids));
2811 return ret <= 0 ? -1 : 0;
2814 static int perf_evsel__prepare_tracepoint_event(struct perf_evsel *evsel,
2815 struct pevent *pevent)
2817 struct event_format *event;
2820 /* already prepared */
2821 if (evsel->tp_format)
2824 if (pevent == NULL) {
2825 pr_debug("broken or missing trace data\n");
2829 event = pevent_find_event(pevent, evsel->attr.config);
2830 if (event == NULL) {
2831 pr_debug("cannot find event format for %d\n", (int)evsel->attr.config);
2836 snprintf(bf, sizeof(bf), "%s:%s", event->system, event->name);
2837 evsel->name = strdup(bf);
2838 if (evsel->name == NULL)
2842 evsel->tp_format = event;
2846 static int perf_evlist__prepare_tracepoint_events(struct perf_evlist *evlist,
2847 struct pevent *pevent)
2849 struct perf_evsel *pos;
2851 evlist__for_each_entry(evlist, pos) {
2852 if (pos->attr.type == PERF_TYPE_TRACEPOINT &&
2853 perf_evsel__prepare_tracepoint_event(pos, pevent))
2860 int perf_session__read_header(struct perf_session *session)
2862 struct perf_data_file *file = session->file;
2863 struct perf_header *header = &session->header;
2864 struct perf_file_header f_header;
2865 struct perf_file_attr f_attr;
2867 int nr_attrs, nr_ids, i, j;
2868 int fd = perf_data_file__fd(file);
2870 session->evlist = perf_evlist__new();
2871 if (session->evlist == NULL)
2874 session->evlist->env = &header->env;
2875 session->machines.host.env = &header->env;
2876 if (perf_data_file__is_pipe(file))
2877 return perf_header__read_pipe(session);
2879 if (perf_file_header__read(&f_header, header, fd) < 0)
2883 * Sanity check that perf.data was written cleanly; data size is
2884 * initialized to 0 and updated only if the on_exit function is run.
2885 * If data size is still 0 then the file contains only partial
2886 * information. Just warn user and process it as much as it can.
2888 if (f_header.data.size == 0) {
2889 pr_warning("WARNING: The %s file's data size field is 0 which is unexpected.\n"
2890 "Was the 'perf record' command properly terminated?\n",
2894 nr_attrs = f_header.attrs.size / f_header.attr_size;
2895 lseek(fd, f_header.attrs.offset, SEEK_SET);
2897 for (i = 0; i < nr_attrs; i++) {
2898 struct perf_evsel *evsel;
2901 if (read_attr(fd, header, &f_attr) < 0)
2904 if (header->needs_swap) {
2905 f_attr.ids.size = bswap_64(f_attr.ids.size);
2906 f_attr.ids.offset = bswap_64(f_attr.ids.offset);
2907 perf_event__attr_swap(&f_attr.attr);
2910 tmp = lseek(fd, 0, SEEK_CUR);
2911 evsel = perf_evsel__new(&f_attr.attr);
2914 goto out_delete_evlist;
2916 evsel->needs_swap = header->needs_swap;
2918 * Do it before so that if perf_evsel__alloc_id fails, this
2919 * entry gets purged too at perf_evlist__delete().
2921 perf_evlist__add(session->evlist, evsel);
2923 nr_ids = f_attr.ids.size / sizeof(u64);
2925 * We don't have the cpu and thread maps on the header, so
2926 * for allocating the perf_sample_id table we fake 1 cpu and
2927 * hattr->ids threads.
2929 if (perf_evsel__alloc_id(evsel, 1, nr_ids))
2930 goto out_delete_evlist;
2932 lseek(fd, f_attr.ids.offset, SEEK_SET);
2934 for (j = 0; j < nr_ids; j++) {
2935 if (perf_header__getbuffer64(header, fd, &f_id, sizeof(f_id)))
2938 perf_evlist__id_add(session->evlist, evsel, 0, j, f_id);
2941 lseek(fd, tmp, SEEK_SET);
2944 symbol_conf.nr_events = nr_attrs;
2946 perf_header__process_sections(header, fd, &session->tevent,
2947 perf_file_section__process);
2949 if (perf_evlist__prepare_tracepoint_events(session->evlist,
2950 session->tevent.pevent))
2951 goto out_delete_evlist;
2958 perf_evlist__delete(session->evlist);
2959 session->evlist = NULL;
2963 int perf_event__synthesize_attr(struct perf_tool *tool,
2964 struct perf_event_attr *attr, u32 ids, u64 *id,
2965 perf_event__handler_t process)
2967 union perf_event *ev;
2971 size = sizeof(struct perf_event_attr);
2972 size = PERF_ALIGN(size, sizeof(u64));
2973 size += sizeof(struct perf_event_header);
2974 size += ids * sizeof(u64);
2981 ev->attr.attr = *attr;
2982 memcpy(ev->attr.id, id, ids * sizeof(u64));
2984 ev->attr.header.type = PERF_RECORD_HEADER_ATTR;
2985 ev->attr.header.size = (u16)size;
2987 if (ev->attr.header.size == size)
2988 err = process(tool, ev, NULL, NULL);
2997 static struct event_update_event *
2998 event_update_event__new(size_t size, u64 type, u64 id)
3000 struct event_update_event *ev;
3002 size += sizeof(*ev);
3003 size = PERF_ALIGN(size, sizeof(u64));
3007 ev->header.type = PERF_RECORD_EVENT_UPDATE;
3008 ev->header.size = (u16)size;
3016 perf_event__synthesize_event_update_unit(struct perf_tool *tool,
3017 struct perf_evsel *evsel,
3018 perf_event__handler_t process)
3020 struct event_update_event *ev;
3021 size_t size = strlen(evsel->unit);
3024 ev = event_update_event__new(size + 1, PERF_EVENT_UPDATE__UNIT, evsel->id[0]);
3028 strncpy(ev->data, evsel->unit, size);
3029 err = process(tool, (union perf_event *)ev, NULL, NULL);
3035 perf_event__synthesize_event_update_scale(struct perf_tool *tool,
3036 struct perf_evsel *evsel,
3037 perf_event__handler_t process)
3039 struct event_update_event *ev;
3040 struct event_update_event_scale *ev_data;
3043 ev = event_update_event__new(sizeof(*ev_data), PERF_EVENT_UPDATE__SCALE, evsel->id[0]);
3047 ev_data = (struct event_update_event_scale *) ev->data;
3048 ev_data->scale = evsel->scale;
3049 err = process(tool, (union perf_event*) ev, NULL, NULL);
3055 perf_event__synthesize_event_update_name(struct perf_tool *tool,
3056 struct perf_evsel *evsel,
3057 perf_event__handler_t process)
3059 struct event_update_event *ev;
3060 size_t len = strlen(evsel->name);
3063 ev = event_update_event__new(len + 1, PERF_EVENT_UPDATE__NAME, evsel->id[0]);
3067 strncpy(ev->data, evsel->name, len);
3068 err = process(tool, (union perf_event*) ev, NULL, NULL);
3074 perf_event__synthesize_event_update_cpus(struct perf_tool *tool,
3075 struct perf_evsel *evsel,
3076 perf_event__handler_t process)
3078 size_t size = sizeof(struct event_update_event);
3079 struct event_update_event *ev;
3083 if (!evsel->own_cpus)
3086 ev = cpu_map_data__alloc(evsel->own_cpus, &size, &type, &max);
3090 ev->header.type = PERF_RECORD_EVENT_UPDATE;
3091 ev->header.size = (u16)size;
3092 ev->type = PERF_EVENT_UPDATE__CPUS;
3093 ev->id = evsel->id[0];
3095 cpu_map_data__synthesize((struct cpu_map_data *) ev->data,
3099 err = process(tool, (union perf_event*) ev, NULL, NULL);
3104 size_t perf_event__fprintf_event_update(union perf_event *event, FILE *fp)
3106 struct event_update_event *ev = &event->event_update;
3107 struct event_update_event_scale *ev_scale;
3108 struct event_update_event_cpus *ev_cpus;
3109 struct cpu_map *map;
3112 ret = fprintf(fp, "\n... id: %" PRIu64 "\n", ev->id);
3115 case PERF_EVENT_UPDATE__SCALE:
3116 ev_scale = (struct event_update_event_scale *) ev->data;
3117 ret += fprintf(fp, "... scale: %f\n", ev_scale->scale);
3119 case PERF_EVENT_UPDATE__UNIT:
3120 ret += fprintf(fp, "... unit: %s\n", ev->data);
3122 case PERF_EVENT_UPDATE__NAME:
3123 ret += fprintf(fp, "... name: %s\n", ev->data);
3125 case PERF_EVENT_UPDATE__CPUS:
3126 ev_cpus = (struct event_update_event_cpus *) ev->data;
3127 ret += fprintf(fp, "... ");
3129 map = cpu_map__new_data(&ev_cpus->cpus);
3131 ret += cpu_map__fprintf(map, fp);
3133 ret += fprintf(fp, "failed to get cpus\n");
3136 ret += fprintf(fp, "... unknown type\n");
3143 int perf_event__synthesize_attrs(struct perf_tool *tool,
3144 struct perf_session *session,
3145 perf_event__handler_t process)
3147 struct perf_evsel *evsel;
3150 evlist__for_each_entry(session->evlist, evsel) {
3151 err = perf_event__synthesize_attr(tool, &evsel->attr, evsel->ids,
3152 evsel->id, process);
3154 pr_debug("failed to create perf header attribute\n");
3162 int perf_event__process_attr(struct perf_tool *tool __maybe_unused,
3163 union perf_event *event,
3164 struct perf_evlist **pevlist)
3167 struct perf_evsel *evsel;
3168 struct perf_evlist *evlist = *pevlist;
3170 if (evlist == NULL) {
3171 *pevlist = evlist = perf_evlist__new();
3176 evsel = perf_evsel__new(&event->attr.attr);
3180 perf_evlist__add(evlist, evsel);
3182 ids = event->header.size;
3183 ids -= (void *)&event->attr.id - (void *)event;
3184 n_ids = ids / sizeof(u64);
3186 * We don't have the cpu and thread maps on the header, so
3187 * for allocating the perf_sample_id table we fake 1 cpu and
3188 * hattr->ids threads.
3190 if (perf_evsel__alloc_id(evsel, 1, n_ids))
3193 for (i = 0; i < n_ids; i++) {
3194 perf_evlist__id_add(evlist, evsel, 0, i, event->attr.id[i]);
3197 symbol_conf.nr_events = evlist->nr_entries;
3202 int perf_event__process_event_update(struct perf_tool *tool __maybe_unused,
3203 union perf_event *event,
3204 struct perf_evlist **pevlist)
3206 struct event_update_event *ev = &event->event_update;
3207 struct event_update_event_scale *ev_scale;
3208 struct event_update_event_cpus *ev_cpus;
3209 struct perf_evlist *evlist;
3210 struct perf_evsel *evsel;
3211 struct cpu_map *map;
3213 if (!pevlist || *pevlist == NULL)
3218 evsel = perf_evlist__id2evsel(evlist, ev->id);
3223 case PERF_EVENT_UPDATE__UNIT:
3224 evsel->unit = strdup(ev->data);
3226 case PERF_EVENT_UPDATE__NAME:
3227 evsel->name = strdup(ev->data);
3229 case PERF_EVENT_UPDATE__SCALE:
3230 ev_scale = (struct event_update_event_scale *) ev->data;
3231 evsel->scale = ev_scale->scale;
3233 case PERF_EVENT_UPDATE__CPUS:
3234 ev_cpus = (struct event_update_event_cpus *) ev->data;
3236 map = cpu_map__new_data(&ev_cpus->cpus);
3238 evsel->own_cpus = map;
3240 pr_err("failed to get event_update cpus\n");
3248 int perf_event__synthesize_tracing_data(struct perf_tool *tool, int fd,
3249 struct perf_evlist *evlist,
3250 perf_event__handler_t process)
3252 union perf_event ev;
3253 struct tracing_data *tdata;
3254 ssize_t size = 0, aligned_size = 0, padding;
3255 int err __maybe_unused = 0;
3258 * We are going to store the size of the data followed
3259 * by the data contents. Since the fd descriptor is a pipe,
3260 * we cannot seek back to store the size of the data once
3261 * we know it. Instead we:
3263 * - write the tracing data to the temp file
3264 * - get/write the data size to pipe
3265 * - write the tracing data from the temp file
3268 tdata = tracing_data_get(&evlist->entries, fd, true);
3272 memset(&ev, 0, sizeof(ev));
3274 ev.tracing_data.header.type = PERF_RECORD_HEADER_TRACING_DATA;
3276 aligned_size = PERF_ALIGN(size, sizeof(u64));
3277 padding = aligned_size - size;
3278 ev.tracing_data.header.size = sizeof(ev.tracing_data);
3279 ev.tracing_data.size = aligned_size;
3281 process(tool, &ev, NULL, NULL);
3284 * The put function will copy all the tracing data
3285 * stored in temp file to the pipe.
3287 tracing_data_put(tdata);
3289 write_padded(fd, NULL, 0, padding);
3291 return aligned_size;
3294 int perf_event__process_tracing_data(struct perf_tool *tool __maybe_unused,
3295 union perf_event *event,
3296 struct perf_session *session)
3298 ssize_t size_read, padding, size = event->tracing_data.size;
3299 int fd = perf_data_file__fd(session->file);
3300 off_t offset = lseek(fd, 0, SEEK_CUR);
3303 /* setup for reading amidst mmap */
3304 lseek(fd, offset + sizeof(struct tracing_data_event),
3307 size_read = trace_report(fd, &session->tevent,
3309 padding = PERF_ALIGN(size_read, sizeof(u64)) - size_read;
3311 if (readn(fd, buf, padding) < 0) {
3312 pr_err("%s: reading input file", __func__);
3315 if (session->repipe) {
3316 int retw = write(STDOUT_FILENO, buf, padding);
3317 if (retw <= 0 || retw != padding) {
3318 pr_err("%s: repiping tracing data padding", __func__);
3323 if (size_read + padding != size) {
3324 pr_err("%s: tracing data size mismatch", __func__);
3328 perf_evlist__prepare_tracepoint_events(session->evlist,
3329 session->tevent.pevent);
3331 return size_read + padding;
3334 int perf_event__synthesize_build_id(struct perf_tool *tool,
3335 struct dso *pos, u16 misc,
3336 perf_event__handler_t process,
3337 struct machine *machine)
3339 union perf_event ev;
3346 memset(&ev, 0, sizeof(ev));
3348 len = pos->long_name_len + 1;
3349 len = PERF_ALIGN(len, NAME_ALIGN);
3350 memcpy(&ev.build_id.build_id, pos->build_id, sizeof(pos->build_id));
3351 ev.build_id.header.type = PERF_RECORD_HEADER_BUILD_ID;
3352 ev.build_id.header.misc = misc;
3353 ev.build_id.pid = machine->pid;
3354 ev.build_id.header.size = sizeof(ev.build_id) + len;
3355 memcpy(&ev.build_id.filename, pos->long_name, pos->long_name_len);
3357 err = process(tool, &ev, NULL, machine);
3362 int perf_event__process_build_id(struct perf_tool *tool __maybe_unused,
3363 union perf_event *event,
3364 struct perf_session *session)
3366 __event_process_build_id(&event->build_id,
3367 event->build_id.filename,