7 #include <linux/list.h>
8 #include <linux/kernel.h>
9 #include <linux/bitops.h>
10 #include <sys/utsname.h>
16 #include "trace-event.h"
26 #include <api/fs/fs.h>
31 * must be a numerical value to let the endianness
32 * determine the memory layout. That way we are able
33 * to detect endianness when reading the perf.data file
36 * we check for legacy (PERFFILE) format.
38 static const char *__perf_magic1 = "PERFFILE";
39 static const u64 __perf_magic2 = 0x32454c4946524550ULL;
40 static const u64 __perf_magic2_sw = 0x50455246494c4532ULL;
42 #define PERF_MAGIC __perf_magic2
44 struct perf_file_attr {
45 struct perf_event_attr attr;
46 struct perf_file_section ids;
49 void perf_header__set_feat(struct perf_header *header, int feat)
51 set_bit(feat, header->adds_features);
54 void perf_header__clear_feat(struct perf_header *header, int feat)
56 clear_bit(feat, header->adds_features);
59 bool perf_header__has_feat(const struct perf_header *header, int feat)
61 return test_bit(feat, header->adds_features);
64 static int do_write(int fd, const void *buf, size_t size)
67 int ret = write(fd, buf, size);
79 int write_padded(int fd, const void *bf, size_t count, size_t count_aligned)
81 static const char zero_buf[NAME_ALIGN];
82 int err = do_write(fd, bf, count);
85 err = do_write(fd, zero_buf, count_aligned - count);
90 #define string_size(str) \
91 (PERF_ALIGN((strlen(str) + 1), NAME_ALIGN) + sizeof(u32))
93 static int do_write_string(int fd, const char *str)
98 olen = strlen(str) + 1;
99 len = PERF_ALIGN(olen, NAME_ALIGN);
101 /* write len, incl. \0 */
102 ret = do_write(fd, &len, sizeof(len));
106 return write_padded(fd, str, olen, len);
109 static char *do_read_string(int fd, struct perf_header *ph)
115 sz = readn(fd, &len, sizeof(len));
116 if (sz < (ssize_t)sizeof(len))
126 ret = readn(fd, buf, len);
127 if (ret == (ssize_t)len) {
129 * strings are padded by zeroes
130 * thus the actual strlen of buf
131 * may be less than len
140 static int write_tracing_data(int fd, struct perf_header *h __maybe_unused,
141 struct perf_evlist *evlist)
143 return read_tracing_data(fd, &evlist->entries);
147 static int write_build_id(int fd, struct perf_header *h,
148 struct perf_evlist *evlist __maybe_unused)
150 struct perf_session *session;
153 session = container_of(h, struct perf_session, header);
155 if (!perf_session__read_build_ids(session, true))
158 err = perf_session__write_buildid_table(session, fd);
160 pr_debug("failed to write buildid table\n");
163 perf_session__cache_build_ids(session);
168 static int write_hostname(int fd, struct perf_header *h __maybe_unused,
169 struct perf_evlist *evlist __maybe_unused)
178 return do_write_string(fd, uts.nodename);
181 static int write_osrelease(int fd, struct perf_header *h __maybe_unused,
182 struct perf_evlist *evlist __maybe_unused)
191 return do_write_string(fd, uts.release);
194 static int write_arch(int fd, struct perf_header *h __maybe_unused,
195 struct perf_evlist *evlist __maybe_unused)
204 return do_write_string(fd, uts.machine);
207 static int write_version(int fd, struct perf_header *h __maybe_unused,
208 struct perf_evlist *evlist __maybe_unused)
210 return do_write_string(fd, perf_version_string);
213 static int __write_cpudesc(int fd, const char *cpuinfo_proc)
218 const char *search = cpuinfo_proc;
225 file = fopen("/proc/cpuinfo", "r");
229 while (getline(&buf, &len, file) > 0) {
230 ret = strncmp(buf, search, strlen(search));
242 p = strchr(buf, ':');
243 if (p && *(p+1) == ' ' && *(p+2))
249 /* squash extra space characters (branding string) */
256 while (*q && isspace(*q))
259 while ((*r++ = *q++));
263 ret = do_write_string(fd, s);
270 static int write_cpudesc(int fd, struct perf_header *h __maybe_unused,
271 struct perf_evlist *evlist __maybe_unused)
274 #define CPUINFO_PROC {"model name", }
276 const char *cpuinfo_procs[] = CPUINFO_PROC;
279 for (i = 0; i < ARRAY_SIZE(cpuinfo_procs); i++) {
281 ret = __write_cpudesc(fd, cpuinfo_procs[i]);
289 static int write_nrcpus(int fd, struct perf_header *h __maybe_unused,
290 struct perf_evlist *evlist __maybe_unused)
296 nr = sysconf(_SC_NPROCESSORS_CONF);
300 nrc = (u32)(nr & UINT_MAX);
302 nr = sysconf(_SC_NPROCESSORS_ONLN);
306 nra = (u32)(nr & UINT_MAX);
308 ret = do_write(fd, &nrc, sizeof(nrc));
312 return do_write(fd, &nra, sizeof(nra));
315 static int write_event_desc(int fd, struct perf_header *h __maybe_unused,
316 struct perf_evlist *evlist)
318 struct perf_evsel *evsel;
322 nre = evlist->nr_entries;
325 * write number of events
327 ret = do_write(fd, &nre, sizeof(nre));
332 * size of perf_event_attr struct
334 sz = (u32)sizeof(evsel->attr);
335 ret = do_write(fd, &sz, sizeof(sz));
339 evlist__for_each_entry(evlist, evsel) {
340 ret = do_write(fd, &evsel->attr, sz);
344 * write number of unique id per event
345 * there is one id per instance of an event
347 * copy into an nri to be independent of the
351 ret = do_write(fd, &nri, sizeof(nri));
356 * write event string as passed on cmdline
358 ret = do_write_string(fd, perf_evsel__name(evsel));
362 * write unique ids for this event
364 ret = do_write(fd, evsel->id, evsel->ids * sizeof(u64));
371 static int write_cmdline(int fd, struct perf_header *h __maybe_unused,
372 struct perf_evlist *evlist __maybe_unused)
374 char buf[MAXPATHLEN];
380 * actual atual path to perf binary
382 sprintf(proc, "/proc/%d/exe", getpid());
383 ret = readlink(proc, buf, sizeof(buf));
387 /* readlink() does not add null termination */
390 /* account for binary path */
391 n = perf_env.nr_cmdline + 1;
393 ret = do_write(fd, &n, sizeof(n));
397 ret = do_write_string(fd, buf);
401 for (i = 0 ; i < perf_env.nr_cmdline; i++) {
402 ret = do_write_string(fd, perf_env.cmdline_argv[i]);
409 #define CORE_SIB_FMT \
410 "/sys/devices/system/cpu/cpu%d/topology/core_siblings_list"
411 #define THRD_SIB_FMT \
412 "/sys/devices/system/cpu/cpu%d/topology/thread_siblings_list"
418 char **core_siblings;
419 char **thread_siblings;
422 static int build_cpu_topo(struct cpu_topo *tp, int cpu)
425 char filename[MAXPATHLEN];
426 char *buf = NULL, *p;
432 sprintf(filename, CORE_SIB_FMT, cpu);
433 fp = fopen(filename, "r");
437 sret = getline(&buf, &len, fp);
442 p = strchr(buf, '\n');
446 for (i = 0; i < tp->core_sib; i++) {
447 if (!strcmp(buf, tp->core_siblings[i]))
450 if (i == tp->core_sib) {
451 tp->core_siblings[i] = buf;
459 sprintf(filename, THRD_SIB_FMT, cpu);
460 fp = fopen(filename, "r");
464 if (getline(&buf, &len, fp) <= 0)
467 p = strchr(buf, '\n');
471 for (i = 0; i < tp->thread_sib; i++) {
472 if (!strcmp(buf, tp->thread_siblings[i]))
475 if (i == tp->thread_sib) {
476 tp->thread_siblings[i] = buf;
488 static void free_cpu_topo(struct cpu_topo *tp)
495 for (i = 0 ; i < tp->core_sib; i++)
496 zfree(&tp->core_siblings[i]);
498 for (i = 0 ; i < tp->thread_sib; i++)
499 zfree(&tp->thread_siblings[i]);
504 static struct cpu_topo *build_cpu_topology(void)
513 ncpus = sysconf(_SC_NPROCESSORS_CONF);
517 nr = (u32)(ncpus & UINT_MAX);
519 sz = nr * sizeof(char *);
521 addr = calloc(1, sizeof(*tp) + 2 * sz);
528 tp->core_siblings = addr;
530 tp->thread_siblings = addr;
532 for (i = 0; i < nr; i++) {
533 ret = build_cpu_topo(tp, i);
544 static int write_cpu_topology(int fd, struct perf_header *h __maybe_unused,
545 struct perf_evlist *evlist __maybe_unused)
551 tp = build_cpu_topology();
555 ret = do_write(fd, &tp->core_sib, sizeof(tp->core_sib));
559 for (i = 0; i < tp->core_sib; i++) {
560 ret = do_write_string(fd, tp->core_siblings[i]);
564 ret = do_write(fd, &tp->thread_sib, sizeof(tp->thread_sib));
568 for (i = 0; i < tp->thread_sib; i++) {
569 ret = do_write_string(fd, tp->thread_siblings[i]);
574 ret = perf_env__read_cpu_topology_map(&perf_env);
578 for (j = 0; j < perf_env.nr_cpus_avail; j++) {
579 ret = do_write(fd, &perf_env.cpu[j].core_id,
580 sizeof(perf_env.cpu[j].core_id));
583 ret = do_write(fd, &perf_env.cpu[j].socket_id,
584 sizeof(perf_env.cpu[j].socket_id));
595 static int write_total_mem(int fd, struct perf_header *h __maybe_unused,
596 struct perf_evlist *evlist __maybe_unused)
604 fp = fopen("/proc/meminfo", "r");
608 while (getline(&buf, &len, fp) > 0) {
609 ret = strncmp(buf, "MemTotal:", 9);
614 n = sscanf(buf, "%*s %"PRIu64, &mem);
616 ret = do_write(fd, &mem, sizeof(mem));
624 static int write_topo_node(int fd, int node)
626 char str[MAXPATHLEN];
628 char *buf = NULL, *p;
631 u64 mem_total, mem_free, mem;
634 sprintf(str, "/sys/devices/system/node/node%d/meminfo", node);
635 fp = fopen(str, "r");
639 while (getline(&buf, &len, fp) > 0) {
640 /* skip over invalid lines */
641 if (!strchr(buf, ':'))
643 if (sscanf(buf, "%*s %*d %31s %"PRIu64, field, &mem) != 2)
645 if (!strcmp(field, "MemTotal:"))
647 if (!strcmp(field, "MemFree:"))
654 ret = do_write(fd, &mem_total, sizeof(u64));
658 ret = do_write(fd, &mem_free, sizeof(u64));
663 sprintf(str, "/sys/devices/system/node/node%d/cpulist", node);
665 fp = fopen(str, "r");
669 if (getline(&buf, &len, fp) <= 0)
672 p = strchr(buf, '\n');
676 ret = do_write_string(fd, buf);
684 static int write_numa_topology(int fd, struct perf_header *h __maybe_unused,
685 struct perf_evlist *evlist __maybe_unused)
690 struct cpu_map *node_map = NULL;
695 fp = fopen("/sys/devices/system/node/online", "r");
699 if (getline(&buf, &len, fp) <= 0)
702 c = strchr(buf, '\n');
706 node_map = cpu_map__new(buf);
710 nr = (u32)node_map->nr;
712 ret = do_write(fd, &nr, sizeof(nr));
716 for (i = 0; i < nr; i++) {
717 j = (u32)node_map->map[i];
718 ret = do_write(fd, &j, sizeof(j));
722 ret = write_topo_node(fd, i);
729 cpu_map__put(node_map);
736 * struct pmu_mappings {
745 static int write_pmu_mappings(int fd, struct perf_header *h __maybe_unused,
746 struct perf_evlist *evlist __maybe_unused)
748 struct perf_pmu *pmu = NULL;
749 off_t offset = lseek(fd, 0, SEEK_CUR);
753 /* write real pmu_num later */
754 ret = do_write(fd, &pmu_num, sizeof(pmu_num));
758 while ((pmu = perf_pmu__scan(pmu))) {
763 ret = do_write(fd, &pmu->type, sizeof(pmu->type));
767 ret = do_write_string(fd, pmu->name);
772 if (pwrite(fd, &pmu_num, sizeof(pmu_num), offset) != sizeof(pmu_num)) {
774 lseek(fd, offset, SEEK_SET);
784 * struct group_descs {
786 * struct group_desc {
793 static int write_group_desc(int fd, struct perf_header *h __maybe_unused,
794 struct perf_evlist *evlist)
796 u32 nr_groups = evlist->nr_groups;
797 struct perf_evsel *evsel;
800 ret = do_write(fd, &nr_groups, sizeof(nr_groups));
804 evlist__for_each_entry(evlist, evsel) {
805 if (perf_evsel__is_group_leader(evsel) &&
806 evsel->nr_members > 1) {
807 const char *name = evsel->group_name ?: "{anon_group}";
808 u32 leader_idx = evsel->idx;
809 u32 nr_members = evsel->nr_members;
811 ret = do_write_string(fd, name);
815 ret = do_write(fd, &leader_idx, sizeof(leader_idx));
819 ret = do_write(fd, &nr_members, sizeof(nr_members));
828 * default get_cpuid(): nothing gets recorded
829 * actual implementation must be in arch/$(ARCH)/util/header.c
831 int __attribute__ ((weak)) get_cpuid(char *buffer __maybe_unused,
832 size_t sz __maybe_unused)
837 static int write_cpuid(int fd, struct perf_header *h __maybe_unused,
838 struct perf_evlist *evlist __maybe_unused)
843 ret = get_cpuid(buffer, sizeof(buffer));
849 return do_write_string(fd, buffer);
852 static int write_branch_stack(int fd __maybe_unused,
853 struct perf_header *h __maybe_unused,
854 struct perf_evlist *evlist __maybe_unused)
859 static int write_auxtrace(int fd, struct perf_header *h,
860 struct perf_evlist *evlist __maybe_unused)
862 struct perf_session *session;
865 session = container_of(h, struct perf_session, header);
867 err = auxtrace_index__write(fd, &session->auxtrace_index);
869 pr_err("Failed to write auxtrace index\n");
873 static int cpu_cache_level__sort(const void *a, const void *b)
875 struct cpu_cache_level *cache_a = (struct cpu_cache_level *)a;
876 struct cpu_cache_level *cache_b = (struct cpu_cache_level *)b;
878 return cache_a->level - cache_b->level;
881 static bool cpu_cache_level__cmp(struct cpu_cache_level *a, struct cpu_cache_level *b)
883 if (a->level != b->level)
886 if (a->line_size != b->line_size)
889 if (a->sets != b->sets)
892 if (a->ways != b->ways)
895 if (strcmp(a->type, b->type))
898 if (strcmp(a->size, b->size))
901 if (strcmp(a->map, b->map))
907 static int cpu_cache_level__read(struct cpu_cache_level *cache, u32 cpu, u16 level)
909 char path[PATH_MAX], file[PATH_MAX];
913 scnprintf(path, PATH_MAX, "devices/system/cpu/cpu%d/cache/index%d/", cpu, level);
914 scnprintf(file, PATH_MAX, "%s/%s", sysfs__mountpoint(), path);
919 scnprintf(file, PATH_MAX, "%s/level", path);
920 if (sysfs__read_int(file, (int *) &cache->level))
923 scnprintf(file, PATH_MAX, "%s/coherency_line_size", path);
924 if (sysfs__read_int(file, (int *) &cache->line_size))
927 scnprintf(file, PATH_MAX, "%s/number_of_sets", path);
928 if (sysfs__read_int(file, (int *) &cache->sets))
931 scnprintf(file, PATH_MAX, "%s/ways_of_associativity", path);
932 if (sysfs__read_int(file, (int *) &cache->ways))
935 scnprintf(file, PATH_MAX, "%s/type", path);
936 if (sysfs__read_str(file, &cache->type, &len))
939 cache->type[len] = 0;
940 cache->type = rtrim(cache->type);
942 scnprintf(file, PATH_MAX, "%s/size", path);
943 if (sysfs__read_str(file, &cache->size, &len)) {
948 cache->size[len] = 0;
949 cache->size = rtrim(cache->size);
951 scnprintf(file, PATH_MAX, "%s/shared_cpu_list", path);
952 if (sysfs__read_str(file, &cache->map, &len)) {
959 cache->map = rtrim(cache->map);
963 static void cpu_cache_level__fprintf(FILE *out, struct cpu_cache_level *c)
965 fprintf(out, "L%d %-15s %8s [%s]\n", c->level, c->type, c->size, c->map);
968 static int build_caches(struct cpu_cache_level caches[], u32 size, u32 *cntp)
975 ncpus = sysconf(_SC_NPROCESSORS_CONF);
979 nr = (u32)(ncpus & UINT_MAX);
981 for (cpu = 0; cpu < nr; cpu++) {
982 for (level = 0; level < 10; level++) {
983 struct cpu_cache_level c;
986 err = cpu_cache_level__read(&c, cpu, level);
993 for (i = 0; i < cnt; i++) {
994 if (cpu_cache_level__cmp(&c, &caches[i]))
1001 cpu_cache_level__free(&c);
1003 if (WARN_ONCE(cnt == size, "way too many cpu caches.."))
1012 #define MAX_CACHES 2000
1014 static int write_cache(int fd, struct perf_header *h __maybe_unused,
1015 struct perf_evlist *evlist __maybe_unused)
1017 struct cpu_cache_level caches[MAX_CACHES];
1018 u32 cnt = 0, i, version = 1;
1021 ret = build_caches(caches, MAX_CACHES, &cnt);
1025 qsort(&caches, cnt, sizeof(struct cpu_cache_level), cpu_cache_level__sort);
1027 ret = do_write(fd, &version, sizeof(u32));
1031 ret = do_write(fd, &cnt, sizeof(u32));
1035 for (i = 0; i < cnt; i++) {
1036 struct cpu_cache_level *c = &caches[i];
1039 ret = do_write(fd, &c->v, sizeof(u32)); \
1050 ret = do_write_string(fd, (const char *) c->v); \
1061 for (i = 0; i < cnt; i++)
1062 cpu_cache_level__free(&caches[i]);
1066 static int write_stat(int fd __maybe_unused,
1067 struct perf_header *h __maybe_unused,
1068 struct perf_evlist *evlist __maybe_unused)
1073 static void print_hostname(struct perf_header *ph, int fd __maybe_unused,
1076 fprintf(fp, "# hostname : %s\n", ph->env.hostname);
1079 static void print_osrelease(struct perf_header *ph, int fd __maybe_unused,
1082 fprintf(fp, "# os release : %s\n", ph->env.os_release);
1085 static void print_arch(struct perf_header *ph, int fd __maybe_unused, FILE *fp)
1087 fprintf(fp, "# arch : %s\n", ph->env.arch);
1090 static void print_cpudesc(struct perf_header *ph, int fd __maybe_unused,
1093 fprintf(fp, "# cpudesc : %s\n", ph->env.cpu_desc);
1096 static void print_nrcpus(struct perf_header *ph, int fd __maybe_unused,
1099 fprintf(fp, "# nrcpus online : %u\n", ph->env.nr_cpus_online);
1100 fprintf(fp, "# nrcpus avail : %u\n", ph->env.nr_cpus_avail);
1103 static void print_version(struct perf_header *ph, int fd __maybe_unused,
1106 fprintf(fp, "# perf version : %s\n", ph->env.version);
1109 static void print_cmdline(struct perf_header *ph, int fd __maybe_unused,
1114 nr = ph->env.nr_cmdline;
1116 fprintf(fp, "# cmdline : ");
1118 for (i = 0; i < nr; i++)
1119 fprintf(fp, "%s ", ph->env.cmdline_argv[i]);
1123 static void print_cpu_topology(struct perf_header *ph, int fd __maybe_unused,
1128 int cpu_nr = ph->env.nr_cpus_online;
1130 nr = ph->env.nr_sibling_cores;
1131 str = ph->env.sibling_cores;
1133 for (i = 0; i < nr; i++) {
1134 fprintf(fp, "# sibling cores : %s\n", str);
1135 str += strlen(str) + 1;
1138 nr = ph->env.nr_sibling_threads;
1139 str = ph->env.sibling_threads;
1141 for (i = 0; i < nr; i++) {
1142 fprintf(fp, "# sibling threads : %s\n", str);
1143 str += strlen(str) + 1;
1146 if (ph->env.cpu != NULL) {
1147 for (i = 0; i < cpu_nr; i++)
1148 fprintf(fp, "# CPU %d: Core ID %d, Socket ID %d\n", i,
1149 ph->env.cpu[i].core_id, ph->env.cpu[i].socket_id);
1151 fprintf(fp, "# Core ID and Socket ID information is not available\n");
1154 static void free_event_desc(struct perf_evsel *events)
1156 struct perf_evsel *evsel;
1161 for (evsel = events; evsel->attr.size; evsel++) {
1162 zfree(&evsel->name);
1169 static struct perf_evsel *
1170 read_event_desc(struct perf_header *ph, int fd)
1172 struct perf_evsel *evsel, *events = NULL;
1175 u32 nre, sz, nr, i, j;
1179 /* number of events */
1180 ret = readn(fd, &nre, sizeof(nre));
1181 if (ret != (ssize_t)sizeof(nre))
1185 nre = bswap_32(nre);
1187 ret = readn(fd, &sz, sizeof(sz));
1188 if (ret != (ssize_t)sizeof(sz))
1194 /* buffer to hold on file attr struct */
1199 /* the last event terminates with evsel->attr.size == 0: */
1200 events = calloc(nre + 1, sizeof(*events));
1204 msz = sizeof(evsel->attr);
1208 for (i = 0, evsel = events; i < nre; evsel++, i++) {
1212 * must read entire on-file attr struct to
1213 * sync up with layout.
1215 ret = readn(fd, buf, sz);
1216 if (ret != (ssize_t)sz)
1220 perf_event__attr_swap(buf);
1222 memcpy(&evsel->attr, buf, msz);
1224 ret = readn(fd, &nr, sizeof(nr));
1225 if (ret != (ssize_t)sizeof(nr))
1228 if (ph->needs_swap) {
1230 evsel->needs_swap = true;
1233 evsel->name = do_read_string(fd, ph);
1238 id = calloc(nr, sizeof(*id));
1244 for (j = 0 ; j < nr; j++) {
1245 ret = readn(fd, id, sizeof(*id));
1246 if (ret != (ssize_t)sizeof(*id))
1249 *id = bswap_64(*id);
1257 free_event_desc(events);
1262 static int __desc_attr__fprintf(FILE *fp, const char *name, const char *val,
1263 void *priv __attribute__((unused)))
1265 return fprintf(fp, ", %s = %s", name, val);
1268 static void print_event_desc(struct perf_header *ph, int fd, FILE *fp)
1270 struct perf_evsel *evsel, *events = read_event_desc(ph, fd);
1275 fprintf(fp, "# event desc: not available or unable to read\n");
1279 for (evsel = events; evsel->attr.size; evsel++) {
1280 fprintf(fp, "# event : name = %s, ", evsel->name);
1283 fprintf(fp, ", id = {");
1284 for (j = 0, id = evsel->id; j < evsel->ids; j++, id++) {
1287 fprintf(fp, " %"PRIu64, *id);
1292 perf_event_attr__fprintf(fp, &evsel->attr, __desc_attr__fprintf, NULL);
1297 free_event_desc(events);
1300 static void print_total_mem(struct perf_header *ph, int fd __maybe_unused,
1303 fprintf(fp, "# total memory : %Lu kB\n", ph->env.total_mem);
1306 static void print_numa_topology(struct perf_header *ph, int fd __maybe_unused,
1310 struct numa_node *n;
1312 for (i = 0; i < ph->env.nr_numa_nodes; i++) {
1313 n = &ph->env.numa_nodes[i];
1315 fprintf(fp, "# node%u meminfo : total = %"PRIu64" kB,"
1316 " free = %"PRIu64" kB\n",
1317 n->node, n->mem_total, n->mem_free);
1319 fprintf(fp, "# node%u cpu list : ", n->node);
1320 cpu_map__fprintf(n->map, fp);
1324 static void print_cpuid(struct perf_header *ph, int fd __maybe_unused, FILE *fp)
1326 fprintf(fp, "# cpuid : %s\n", ph->env.cpuid);
1329 static void print_branch_stack(struct perf_header *ph __maybe_unused,
1330 int fd __maybe_unused, FILE *fp)
1332 fprintf(fp, "# contains samples with branch stack\n");
1335 static void print_auxtrace(struct perf_header *ph __maybe_unused,
1336 int fd __maybe_unused, FILE *fp)
1338 fprintf(fp, "# contains AUX area data (e.g. instruction trace)\n");
1341 static void print_stat(struct perf_header *ph __maybe_unused,
1342 int fd __maybe_unused, FILE *fp)
1344 fprintf(fp, "# contains stat data\n");
1347 static void print_cache(struct perf_header *ph __maybe_unused,
1348 int fd __maybe_unused, FILE *fp __maybe_unused)
1352 fprintf(fp, "# CPU cache info:\n");
1353 for (i = 0; i < ph->env.caches_cnt; i++) {
1355 cpu_cache_level__fprintf(fp, &ph->env.caches[i]);
1359 static void print_pmu_mappings(struct perf_header *ph, int fd __maybe_unused,
1362 const char *delimiter = "# pmu mappings: ";
1367 pmu_num = ph->env.nr_pmu_mappings;
1369 fprintf(fp, "# pmu mappings: not available\n");
1373 str = ph->env.pmu_mappings;
1376 type = strtoul(str, &tmp, 0);
1381 fprintf(fp, "%s%s = %" PRIu32, delimiter, str, type);
1384 str += strlen(str) + 1;
1393 fprintf(fp, "# pmu mappings: unable to read\n");
1396 static void print_group_desc(struct perf_header *ph, int fd __maybe_unused,
1399 struct perf_session *session;
1400 struct perf_evsel *evsel;
1403 session = container_of(ph, struct perf_session, header);
1405 evlist__for_each_entry(session->evlist, evsel) {
1406 if (perf_evsel__is_group_leader(evsel) &&
1407 evsel->nr_members > 1) {
1408 fprintf(fp, "# group: %s{%s", evsel->group_name ?: "",
1409 perf_evsel__name(evsel));
1411 nr = evsel->nr_members - 1;
1413 fprintf(fp, ",%s", perf_evsel__name(evsel));
1421 static int __event_process_build_id(struct build_id_event *bev,
1423 struct perf_session *session)
1426 struct machine *machine;
1429 enum dso_kernel_type dso_type;
1431 machine = perf_session__findnew_machine(session, bev->pid);
1435 cpumode = bev->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
1438 case PERF_RECORD_MISC_KERNEL:
1439 dso_type = DSO_TYPE_KERNEL;
1441 case PERF_RECORD_MISC_GUEST_KERNEL:
1442 dso_type = DSO_TYPE_GUEST_KERNEL;
1444 case PERF_RECORD_MISC_USER:
1445 case PERF_RECORD_MISC_GUEST_USER:
1446 dso_type = DSO_TYPE_USER;
1452 dso = machine__findnew_dso(machine, filename);
1454 char sbuild_id[SBUILD_ID_SIZE];
1456 dso__set_build_id(dso, &bev->build_id);
1458 if (!is_kernel_module(filename, cpumode))
1459 dso->kernel = dso_type;
1461 build_id__sprintf(dso->build_id, sizeof(dso->build_id),
1463 pr_debug("build id event received for %s: %s\n",
1464 dso->long_name, sbuild_id);
1473 static int perf_header__read_build_ids_abi_quirk(struct perf_header *header,
1474 int input, u64 offset, u64 size)
1476 struct perf_session *session = container_of(header, struct perf_session, header);
1478 struct perf_event_header header;
1479 u8 build_id[PERF_ALIGN(BUILD_ID_SIZE, sizeof(u64))];
1482 struct build_id_event bev;
1483 char filename[PATH_MAX];
1484 u64 limit = offset + size;
1486 while (offset < limit) {
1489 if (readn(input, &old_bev, sizeof(old_bev)) != sizeof(old_bev))
1492 if (header->needs_swap)
1493 perf_event_header__bswap(&old_bev.header);
1495 len = old_bev.header.size - sizeof(old_bev);
1496 if (readn(input, filename, len) != len)
1499 bev.header = old_bev.header;
1502 * As the pid is the missing value, we need to fill
1503 * it properly. The header.misc value give us nice hint.
1505 bev.pid = HOST_KERNEL_ID;
1506 if (bev.header.misc == PERF_RECORD_MISC_GUEST_USER ||
1507 bev.header.misc == PERF_RECORD_MISC_GUEST_KERNEL)
1508 bev.pid = DEFAULT_GUEST_KERNEL_ID;
1510 memcpy(bev.build_id, old_bev.build_id, sizeof(bev.build_id));
1511 __event_process_build_id(&bev, filename, session);
1513 offset += bev.header.size;
1519 static int perf_header__read_build_ids(struct perf_header *header,
1520 int input, u64 offset, u64 size)
1522 struct perf_session *session = container_of(header, struct perf_session, header);
1523 struct build_id_event bev;
1524 char filename[PATH_MAX];
1525 u64 limit = offset + size, orig_offset = offset;
1528 while (offset < limit) {
1531 if (readn(input, &bev, sizeof(bev)) != sizeof(bev))
1534 if (header->needs_swap)
1535 perf_event_header__bswap(&bev.header);
1537 len = bev.header.size - sizeof(bev);
1538 if (readn(input, filename, len) != len)
1541 * The a1645ce1 changeset:
1543 * "perf: 'perf kvm' tool for monitoring guest performance from host"
1545 * Added a field to struct build_id_event that broke the file
1548 * Since the kernel build-id is the first entry, process the
1549 * table using the old format if the well known
1550 * '[kernel.kallsyms]' string for the kernel build-id has the
1551 * first 4 characters chopped off (where the pid_t sits).
1553 if (memcmp(filename, "nel.kallsyms]", 13) == 0) {
1554 if (lseek(input, orig_offset, SEEK_SET) == (off_t)-1)
1556 return perf_header__read_build_ids_abi_quirk(header, input, offset, size);
1559 __event_process_build_id(&bev, filename, session);
1561 offset += bev.header.size;
1568 static int process_tracing_data(struct perf_file_section *section __maybe_unused,
1569 struct perf_header *ph __maybe_unused,
1572 ssize_t ret = trace_report(fd, data, false);
1573 return ret < 0 ? -1 : 0;
1576 static int process_build_id(struct perf_file_section *section,
1577 struct perf_header *ph, int fd,
1578 void *data __maybe_unused)
1580 if (perf_header__read_build_ids(ph, fd, section->offset, section->size))
1581 pr_debug("Failed to read buildids, continuing...\n");
1585 static int process_hostname(struct perf_file_section *section __maybe_unused,
1586 struct perf_header *ph, int fd,
1587 void *data __maybe_unused)
1589 ph->env.hostname = do_read_string(fd, ph);
1590 return ph->env.hostname ? 0 : -ENOMEM;
1593 static int process_osrelease(struct perf_file_section *section __maybe_unused,
1594 struct perf_header *ph, int fd,
1595 void *data __maybe_unused)
1597 ph->env.os_release = do_read_string(fd, ph);
1598 return ph->env.os_release ? 0 : -ENOMEM;
1601 static int process_version(struct perf_file_section *section __maybe_unused,
1602 struct perf_header *ph, int fd,
1603 void *data __maybe_unused)
1605 ph->env.version = do_read_string(fd, ph);
1606 return ph->env.version ? 0 : -ENOMEM;
1609 static int process_arch(struct perf_file_section *section __maybe_unused,
1610 struct perf_header *ph, int fd,
1611 void *data __maybe_unused)
1613 ph->env.arch = do_read_string(fd, ph);
1614 return ph->env.arch ? 0 : -ENOMEM;
1617 static int process_nrcpus(struct perf_file_section *section __maybe_unused,
1618 struct perf_header *ph, int fd,
1619 void *data __maybe_unused)
1624 ret = readn(fd, &nr, sizeof(nr));
1625 if (ret != sizeof(nr))
1631 ph->env.nr_cpus_avail = nr;
1633 ret = readn(fd, &nr, sizeof(nr));
1634 if (ret != sizeof(nr))
1640 ph->env.nr_cpus_online = nr;
1644 static int process_cpudesc(struct perf_file_section *section __maybe_unused,
1645 struct perf_header *ph, int fd,
1646 void *data __maybe_unused)
1648 ph->env.cpu_desc = do_read_string(fd, ph);
1649 return ph->env.cpu_desc ? 0 : -ENOMEM;
1652 static int process_cpuid(struct perf_file_section *section __maybe_unused,
1653 struct perf_header *ph, int fd,
1654 void *data __maybe_unused)
1656 ph->env.cpuid = do_read_string(fd, ph);
1657 return ph->env.cpuid ? 0 : -ENOMEM;
1660 static int process_total_mem(struct perf_file_section *section __maybe_unused,
1661 struct perf_header *ph, int fd,
1662 void *data __maybe_unused)
1667 ret = readn(fd, &mem, sizeof(mem));
1668 if (ret != sizeof(mem))
1672 mem = bswap_64(mem);
1674 ph->env.total_mem = mem;
1678 static struct perf_evsel *
1679 perf_evlist__find_by_index(struct perf_evlist *evlist, int idx)
1681 struct perf_evsel *evsel;
1683 evlist__for_each_entry(evlist, evsel) {
1684 if (evsel->idx == idx)
1692 perf_evlist__set_event_name(struct perf_evlist *evlist,
1693 struct perf_evsel *event)
1695 struct perf_evsel *evsel;
1700 evsel = perf_evlist__find_by_index(evlist, event->idx);
1707 evsel->name = strdup(event->name);
1711 process_event_desc(struct perf_file_section *section __maybe_unused,
1712 struct perf_header *header, int fd,
1713 void *data __maybe_unused)
1715 struct perf_session *session;
1716 struct perf_evsel *evsel, *events = read_event_desc(header, fd);
1721 session = container_of(header, struct perf_session, header);
1722 for (evsel = events; evsel->attr.size; evsel++)
1723 perf_evlist__set_event_name(session->evlist, evsel);
1725 free_event_desc(events);
1730 static int process_cmdline(struct perf_file_section *section,
1731 struct perf_header *ph, int fd,
1732 void *data __maybe_unused)
1735 char *str, *cmdline = NULL, **argv = NULL;
1738 ret = readn(fd, &nr, sizeof(nr));
1739 if (ret != sizeof(nr))
1745 ph->env.nr_cmdline = nr;
1747 cmdline = zalloc(section->size + nr + 1);
1751 argv = zalloc(sizeof(char *) * (nr + 1));
1755 for (i = 0; i < nr; i++) {
1756 str = do_read_string(fd, ph);
1760 argv[i] = cmdline + len;
1761 memcpy(argv[i], str, strlen(str) + 1);
1762 len += strlen(str) + 1;
1765 ph->env.cmdline = cmdline;
1766 ph->env.cmdline_argv = (const char **) argv;
1775 static int process_cpu_topology(struct perf_file_section *section,
1776 struct perf_header *ph, int fd,
1777 void *data __maybe_unused)
1783 int cpu_nr = ph->env.nr_cpus_online;
1786 ph->env.cpu = calloc(cpu_nr, sizeof(*ph->env.cpu));
1790 ret = readn(fd, &nr, sizeof(nr));
1791 if (ret != sizeof(nr))
1797 ph->env.nr_sibling_cores = nr;
1798 size += sizeof(u32);
1799 if (strbuf_init(&sb, 128) < 0)
1802 for (i = 0; i < nr; i++) {
1803 str = do_read_string(fd, ph);
1807 /* include a NULL character at the end */
1808 if (strbuf_add(&sb, str, strlen(str) + 1) < 0)
1810 size += string_size(str);
1813 ph->env.sibling_cores = strbuf_detach(&sb, NULL);
1815 ret = readn(fd, &nr, sizeof(nr));
1816 if (ret != sizeof(nr))
1822 ph->env.nr_sibling_threads = nr;
1823 size += sizeof(u32);
1825 for (i = 0; i < nr; i++) {
1826 str = do_read_string(fd, ph);
1830 /* include a NULL character at the end */
1831 if (strbuf_add(&sb, str, strlen(str) + 1) < 0)
1833 size += string_size(str);
1836 ph->env.sibling_threads = strbuf_detach(&sb, NULL);
1839 * The header may be from old perf,
1840 * which doesn't include core id and socket id information.
1842 if (section->size <= size) {
1843 zfree(&ph->env.cpu);
1847 for (i = 0; i < (u32)cpu_nr; i++) {
1848 ret = readn(fd, &nr, sizeof(nr));
1849 if (ret != sizeof(nr))
1855 ph->env.cpu[i].core_id = nr;
1857 ret = readn(fd, &nr, sizeof(nr));
1858 if (ret != sizeof(nr))
1864 if (nr > (u32)cpu_nr) {
1865 pr_debug("socket_id number is too big."
1866 "You may need to upgrade the perf tool.\n");
1870 ph->env.cpu[i].socket_id = nr;
1876 strbuf_release(&sb);
1878 zfree(&ph->env.cpu);
1882 static int process_numa_topology(struct perf_file_section *section __maybe_unused,
1883 struct perf_header *ph, int fd,
1884 void *data __maybe_unused)
1886 struct numa_node *nodes, *n;
1892 ret = readn(fd, &nr, sizeof(nr));
1893 if (ret != sizeof(nr))
1899 ph->env.nr_numa_nodes = nr;
1900 nodes = zalloc(sizeof(*nodes) * nr);
1904 for (i = 0; i < nr; i++) {
1908 ret = readn(fd, &n->node, sizeof(u32));
1909 if (ret != sizeof(n->node))
1912 ret = readn(fd, &n->mem_total, sizeof(u64));
1913 if (ret != sizeof(u64))
1916 ret = readn(fd, &n->mem_free, sizeof(u64));
1917 if (ret != sizeof(u64))
1920 if (ph->needs_swap) {
1921 n->node = bswap_32(n->node);
1922 n->mem_total = bswap_64(n->mem_total);
1923 n->mem_free = bswap_64(n->mem_free);
1926 str = do_read_string(fd, ph);
1930 n->map = cpu_map__new(str);
1936 ph->env.numa_nodes = nodes;
1944 static int process_pmu_mappings(struct perf_file_section *section __maybe_unused,
1945 struct perf_header *ph, int fd,
1946 void *data __maybe_unused)
1954 ret = readn(fd, &pmu_num, sizeof(pmu_num));
1955 if (ret != sizeof(pmu_num))
1959 pmu_num = bswap_32(pmu_num);
1962 pr_debug("pmu mappings not available\n");
1966 ph->env.nr_pmu_mappings = pmu_num;
1967 if (strbuf_init(&sb, 128) < 0)
1971 if (readn(fd, &type, sizeof(type)) != sizeof(type))
1974 type = bswap_32(type);
1976 name = do_read_string(fd, ph);
1980 if (strbuf_addf(&sb, "%u:%s", type, name) < 0)
1982 /* include a NULL character at the end */
1983 if (strbuf_add(&sb, "", 1) < 0)
1986 if (!strcmp(name, "msr"))
1987 ph->env.msr_pmu_type = type;
1992 ph->env.pmu_mappings = strbuf_detach(&sb, NULL);
1996 strbuf_release(&sb);
2000 static int process_group_desc(struct perf_file_section *section __maybe_unused,
2001 struct perf_header *ph, int fd,
2002 void *data __maybe_unused)
2005 u32 i, nr, nr_groups;
2006 struct perf_session *session;
2007 struct perf_evsel *evsel, *leader = NULL;
2014 if (readn(fd, &nr_groups, sizeof(nr_groups)) != sizeof(nr_groups))
2018 nr_groups = bswap_32(nr_groups);
2020 ph->env.nr_groups = nr_groups;
2022 pr_debug("group desc not available\n");
2026 desc = calloc(nr_groups, sizeof(*desc));
2030 for (i = 0; i < nr_groups; i++) {
2031 desc[i].name = do_read_string(fd, ph);
2035 if (readn(fd, &desc[i].leader_idx, sizeof(u32)) != sizeof(u32))
2038 if (readn(fd, &desc[i].nr_members, sizeof(u32)) != sizeof(u32))
2041 if (ph->needs_swap) {
2042 desc[i].leader_idx = bswap_32(desc[i].leader_idx);
2043 desc[i].nr_members = bswap_32(desc[i].nr_members);
2048 * Rebuild group relationship based on the group_desc
2050 session = container_of(ph, struct perf_session, header);
2051 session->evlist->nr_groups = nr_groups;
2054 evlist__for_each_entry(session->evlist, evsel) {
2055 if (evsel->idx == (int) desc[i].leader_idx) {
2056 evsel->leader = evsel;
2057 /* {anon_group} is a dummy name */
2058 if (strcmp(desc[i].name, "{anon_group}")) {
2059 evsel->group_name = desc[i].name;
2060 desc[i].name = NULL;
2062 evsel->nr_members = desc[i].nr_members;
2064 if (i >= nr_groups || nr > 0) {
2065 pr_debug("invalid group desc\n");
2070 nr = evsel->nr_members - 1;
2073 /* This is a group member */
2074 evsel->leader = leader;
2080 if (i != nr_groups || nr != 0) {
2081 pr_debug("invalid group desc\n");
2087 for (i = 0; i < nr_groups; i++)
2088 zfree(&desc[i].name);
2094 static int process_auxtrace(struct perf_file_section *section,
2095 struct perf_header *ph, int fd,
2096 void *data __maybe_unused)
2098 struct perf_session *session;
2101 session = container_of(ph, struct perf_session, header);
2103 err = auxtrace_index__process(fd, section->size, session,
2106 pr_err("Failed to process auxtrace index\n");
2110 static int process_cache(struct perf_file_section *section __maybe_unused,
2111 struct perf_header *ph __maybe_unused, int fd __maybe_unused,
2112 void *data __maybe_unused)
2114 struct cpu_cache_level *caches;
2115 u32 cnt, i, version;
2117 if (readn(fd, &version, sizeof(version)) != sizeof(version))
2121 version = bswap_32(version);
2126 if (readn(fd, &cnt, sizeof(cnt)) != sizeof(cnt))
2130 cnt = bswap_32(cnt);
2132 caches = zalloc(sizeof(*caches) * cnt);
2136 for (i = 0; i < cnt; i++) {
2137 struct cpu_cache_level c;
2140 if (readn(fd, &c.v, sizeof(u32)) != sizeof(u32))\
2141 goto out_free_caches; \
2142 if (ph->needs_swap) \
2143 c.v = bswap_32(c.v); \
2152 c.v = do_read_string(fd, ph); \
2154 goto out_free_caches;
2164 ph->env.caches = caches;
2165 ph->env.caches_cnt = cnt;
2172 struct feature_ops {
2173 int (*write)(int fd, struct perf_header *h, struct perf_evlist *evlist);
2174 void (*print)(struct perf_header *h, int fd, FILE *fp);
2175 int (*process)(struct perf_file_section *section,
2176 struct perf_header *h, int fd, void *data);
2181 #define FEAT_OPA(n, func) \
2182 [n] = { .name = #n, .write = write_##func, .print = print_##func }
2183 #define FEAT_OPP(n, func) \
2184 [n] = { .name = #n, .write = write_##func, .print = print_##func, \
2185 .process = process_##func }
2186 #define FEAT_OPF(n, func) \
2187 [n] = { .name = #n, .write = write_##func, .print = print_##func, \
2188 .process = process_##func, .full_only = true }
2190 /* feature_ops not implemented: */
2191 #define print_tracing_data NULL
2192 #define print_build_id NULL
2194 static const struct feature_ops feat_ops[HEADER_LAST_FEATURE] = {
2195 FEAT_OPP(HEADER_TRACING_DATA, tracing_data),
2196 FEAT_OPP(HEADER_BUILD_ID, build_id),
2197 FEAT_OPP(HEADER_HOSTNAME, hostname),
2198 FEAT_OPP(HEADER_OSRELEASE, osrelease),
2199 FEAT_OPP(HEADER_VERSION, version),
2200 FEAT_OPP(HEADER_ARCH, arch),
2201 FEAT_OPP(HEADER_NRCPUS, nrcpus),
2202 FEAT_OPP(HEADER_CPUDESC, cpudesc),
2203 FEAT_OPP(HEADER_CPUID, cpuid),
2204 FEAT_OPP(HEADER_TOTAL_MEM, total_mem),
2205 FEAT_OPP(HEADER_EVENT_DESC, event_desc),
2206 FEAT_OPP(HEADER_CMDLINE, cmdline),
2207 FEAT_OPF(HEADER_CPU_TOPOLOGY, cpu_topology),
2208 FEAT_OPF(HEADER_NUMA_TOPOLOGY, numa_topology),
2209 FEAT_OPA(HEADER_BRANCH_STACK, branch_stack),
2210 FEAT_OPP(HEADER_PMU_MAPPINGS, pmu_mappings),
2211 FEAT_OPP(HEADER_GROUP_DESC, group_desc),
2212 FEAT_OPP(HEADER_AUXTRACE, auxtrace),
2213 FEAT_OPA(HEADER_STAT, stat),
2214 FEAT_OPF(HEADER_CACHE, cache),
2217 struct header_print_data {
2219 bool full; /* extended list of headers */
2222 static int perf_file_section__fprintf_info(struct perf_file_section *section,
2223 struct perf_header *ph,
2224 int feat, int fd, void *data)
2226 struct header_print_data *hd = data;
2228 if (lseek(fd, section->offset, SEEK_SET) == (off_t)-1) {
2229 pr_debug("Failed to lseek to %" PRIu64 " offset for feature "
2230 "%d, continuing...\n", section->offset, feat);
2233 if (feat >= HEADER_LAST_FEATURE) {
2234 pr_warning("unknown feature %d\n", feat);
2237 if (!feat_ops[feat].print)
2240 if (!feat_ops[feat].full_only || hd->full)
2241 feat_ops[feat].print(ph, fd, hd->fp);
2243 fprintf(hd->fp, "# %s info available, use -I to display\n",
2244 feat_ops[feat].name);
2249 int perf_header__fprintf_info(struct perf_session *session, FILE *fp, bool full)
2251 struct header_print_data hd;
2252 struct perf_header *header = &session->header;
2253 int fd = perf_data_file__fd(session->file);
2257 perf_header__process_sections(header, fd, &hd,
2258 perf_file_section__fprintf_info);
2262 static int do_write_feat(int fd, struct perf_header *h, int type,
2263 struct perf_file_section **p,
2264 struct perf_evlist *evlist)
2269 if (perf_header__has_feat(h, type)) {
2270 if (!feat_ops[type].write)
2273 (*p)->offset = lseek(fd, 0, SEEK_CUR);
2275 err = feat_ops[type].write(fd, h, evlist);
2277 pr_debug("failed to write feature %d\n", type);
2279 /* undo anything written */
2280 lseek(fd, (*p)->offset, SEEK_SET);
2284 (*p)->size = lseek(fd, 0, SEEK_CUR) - (*p)->offset;
2290 static int perf_header__adds_write(struct perf_header *header,
2291 struct perf_evlist *evlist, int fd)
2294 struct perf_file_section *feat_sec, *p;
2300 nr_sections = bitmap_weight(header->adds_features, HEADER_FEAT_BITS);
2304 feat_sec = p = calloc(nr_sections, sizeof(*feat_sec));
2305 if (feat_sec == NULL)
2308 sec_size = sizeof(*feat_sec) * nr_sections;
2310 sec_start = header->feat_offset;
2311 lseek(fd, sec_start + sec_size, SEEK_SET);
2313 for_each_set_bit(feat, header->adds_features, HEADER_FEAT_BITS) {
2314 if (do_write_feat(fd, header, feat, &p, evlist))
2315 perf_header__clear_feat(header, feat);
2318 lseek(fd, sec_start, SEEK_SET);
2320 * may write more than needed due to dropped feature, but
2321 * this is okay, reader will skip the mising entries
2323 err = do_write(fd, feat_sec, sec_size);
2325 pr_debug("failed to write feature section\n");
2330 int perf_header__write_pipe(int fd)
2332 struct perf_pipe_file_header f_header;
2335 f_header = (struct perf_pipe_file_header){
2336 .magic = PERF_MAGIC,
2337 .size = sizeof(f_header),
2340 err = do_write(fd, &f_header, sizeof(f_header));
2342 pr_debug("failed to write perf pipe header\n");
2349 int perf_session__write_header(struct perf_session *session,
2350 struct perf_evlist *evlist,
2351 int fd, bool at_exit)
2353 struct perf_file_header f_header;
2354 struct perf_file_attr f_attr;
2355 struct perf_header *header = &session->header;
2356 struct perf_evsel *evsel;
2360 lseek(fd, sizeof(f_header), SEEK_SET);
2362 evlist__for_each_entry(session->evlist, evsel) {
2363 evsel->id_offset = lseek(fd, 0, SEEK_CUR);
2364 err = do_write(fd, evsel->id, evsel->ids * sizeof(u64));
2366 pr_debug("failed to write perf header\n");
2371 attr_offset = lseek(fd, 0, SEEK_CUR);
2373 evlist__for_each_entry(evlist, evsel) {
2374 f_attr = (struct perf_file_attr){
2375 .attr = evsel->attr,
2377 .offset = evsel->id_offset,
2378 .size = evsel->ids * sizeof(u64),
2381 err = do_write(fd, &f_attr, sizeof(f_attr));
2383 pr_debug("failed to write perf header attribute\n");
2388 if (!header->data_offset)
2389 header->data_offset = lseek(fd, 0, SEEK_CUR);
2390 header->feat_offset = header->data_offset + header->data_size;
2393 err = perf_header__adds_write(header, evlist, fd);
2398 f_header = (struct perf_file_header){
2399 .magic = PERF_MAGIC,
2400 .size = sizeof(f_header),
2401 .attr_size = sizeof(f_attr),
2403 .offset = attr_offset,
2404 .size = evlist->nr_entries * sizeof(f_attr),
2407 .offset = header->data_offset,
2408 .size = header->data_size,
2410 /* event_types is ignored, store zeros */
2413 memcpy(&f_header.adds_features, &header->adds_features, sizeof(header->adds_features));
2415 lseek(fd, 0, SEEK_SET);
2416 err = do_write(fd, &f_header, sizeof(f_header));
2418 pr_debug("failed to write perf header\n");
2421 lseek(fd, header->data_offset + header->data_size, SEEK_SET);
2426 static int perf_header__getbuffer64(struct perf_header *header,
2427 int fd, void *buf, size_t size)
2429 if (readn(fd, buf, size) <= 0)
2432 if (header->needs_swap)
2433 mem_bswap_64(buf, size);
2438 int perf_header__process_sections(struct perf_header *header, int fd,
2440 int (*process)(struct perf_file_section *section,
2441 struct perf_header *ph,
2442 int feat, int fd, void *data))
2444 struct perf_file_section *feat_sec, *sec;
2450 nr_sections = bitmap_weight(header->adds_features, HEADER_FEAT_BITS);
2454 feat_sec = sec = calloc(nr_sections, sizeof(*feat_sec));
2458 sec_size = sizeof(*feat_sec) * nr_sections;
2460 lseek(fd, header->feat_offset, SEEK_SET);
2462 err = perf_header__getbuffer64(header, fd, feat_sec, sec_size);
2466 for_each_set_bit(feat, header->adds_features, HEADER_LAST_FEATURE) {
2467 err = process(sec++, header, feat, fd, data);
2477 static const int attr_file_abi_sizes[] = {
2478 [0] = PERF_ATTR_SIZE_VER0,
2479 [1] = PERF_ATTR_SIZE_VER1,
2480 [2] = PERF_ATTR_SIZE_VER2,
2481 [3] = PERF_ATTR_SIZE_VER3,
2482 [4] = PERF_ATTR_SIZE_VER4,
2487 * In the legacy file format, the magic number is not used to encode endianness.
2488 * hdr_sz was used to encode endianness. But given that hdr_sz can vary based
2489 * on ABI revisions, we need to try all combinations for all endianness to
2490 * detect the endianness.
2492 static int try_all_file_abis(uint64_t hdr_sz, struct perf_header *ph)
2494 uint64_t ref_size, attr_size;
2497 for (i = 0 ; attr_file_abi_sizes[i]; i++) {
2498 ref_size = attr_file_abi_sizes[i]
2499 + sizeof(struct perf_file_section);
2500 if (hdr_sz != ref_size) {
2501 attr_size = bswap_64(hdr_sz);
2502 if (attr_size != ref_size)
2505 ph->needs_swap = true;
2507 pr_debug("ABI%d perf.data file detected, need_swap=%d\n",
2512 /* could not determine endianness */
2516 #define PERF_PIPE_HDR_VER0 16
2518 static const size_t attr_pipe_abi_sizes[] = {
2519 [0] = PERF_PIPE_HDR_VER0,
2524 * In the legacy pipe format, there is an implicit assumption that endiannesss
2525 * between host recording the samples, and host parsing the samples is the
2526 * same. This is not always the case given that the pipe output may always be
2527 * redirected into a file and analyzed on a different machine with possibly a
2528 * different endianness and perf_event ABI revsions in the perf tool itself.
2530 static int try_all_pipe_abis(uint64_t hdr_sz, struct perf_header *ph)
2535 for (i = 0 ; attr_pipe_abi_sizes[i]; i++) {
2536 if (hdr_sz != attr_pipe_abi_sizes[i]) {
2537 attr_size = bswap_64(hdr_sz);
2538 if (attr_size != hdr_sz)
2541 ph->needs_swap = true;
2543 pr_debug("Pipe ABI%d perf.data file detected\n", i);
2549 bool is_perf_magic(u64 magic)
2551 if (!memcmp(&magic, __perf_magic1, sizeof(magic))
2552 || magic == __perf_magic2
2553 || magic == __perf_magic2_sw)
2559 static int check_magic_endian(u64 magic, uint64_t hdr_sz,
2560 bool is_pipe, struct perf_header *ph)
2564 /* check for legacy format */
2565 ret = memcmp(&magic, __perf_magic1, sizeof(magic));
2567 ph->version = PERF_HEADER_VERSION_1;
2568 pr_debug("legacy perf.data format\n");
2570 return try_all_pipe_abis(hdr_sz, ph);
2572 return try_all_file_abis(hdr_sz, ph);
2575 * the new magic number serves two purposes:
2576 * - unique number to identify actual perf.data files
2577 * - encode endianness of file
2579 ph->version = PERF_HEADER_VERSION_2;
2581 /* check magic number with one endianness */
2582 if (magic == __perf_magic2)
2585 /* check magic number with opposite endianness */
2586 if (magic != __perf_magic2_sw)
2589 ph->needs_swap = true;
2594 int perf_file_header__read(struct perf_file_header *header,
2595 struct perf_header *ph, int fd)
2599 lseek(fd, 0, SEEK_SET);
2601 ret = readn(fd, header, sizeof(*header));
2605 if (check_magic_endian(header->magic,
2606 header->attr_size, false, ph) < 0) {
2607 pr_debug("magic/endian check failed\n");
2611 if (ph->needs_swap) {
2612 mem_bswap_64(header, offsetof(struct perf_file_header,
2616 if (header->size != sizeof(*header)) {
2617 /* Support the previous format */
2618 if (header->size == offsetof(typeof(*header), adds_features))
2619 bitmap_zero(header->adds_features, HEADER_FEAT_BITS);
2622 } else if (ph->needs_swap) {
2624 * feature bitmap is declared as an array of unsigned longs --
2625 * not good since its size can differ between the host that
2626 * generated the data file and the host analyzing the file.
2628 * We need to handle endianness, but we don't know the size of
2629 * the unsigned long where the file was generated. Take a best
2630 * guess at determining it: try 64-bit swap first (ie., file
2631 * created on a 64-bit host), and check if the hostname feature
2632 * bit is set (this feature bit is forced on as of fbe96f2).
2633 * If the bit is not, undo the 64-bit swap and try a 32-bit
2634 * swap. If the hostname bit is still not set (e.g., older data
2635 * file), punt and fallback to the original behavior --
2636 * clearing all feature bits and setting buildid.
2638 mem_bswap_64(&header->adds_features,
2639 BITS_TO_U64(HEADER_FEAT_BITS));
2641 if (!test_bit(HEADER_HOSTNAME, header->adds_features)) {
2643 mem_bswap_64(&header->adds_features,
2644 BITS_TO_U64(HEADER_FEAT_BITS));
2647 mem_bswap_32(&header->adds_features,
2648 BITS_TO_U32(HEADER_FEAT_BITS));
2651 if (!test_bit(HEADER_HOSTNAME, header->adds_features)) {
2652 bitmap_zero(header->adds_features, HEADER_FEAT_BITS);
2653 set_bit(HEADER_BUILD_ID, header->adds_features);
2657 memcpy(&ph->adds_features, &header->adds_features,
2658 sizeof(ph->adds_features));
2660 ph->data_offset = header->data.offset;
2661 ph->data_size = header->data.size;
2662 ph->feat_offset = header->data.offset + header->data.size;
2666 static int perf_file_section__process(struct perf_file_section *section,
2667 struct perf_header *ph,
2668 int feat, int fd, void *data)
2670 if (lseek(fd, section->offset, SEEK_SET) == (off_t)-1) {
2671 pr_debug("Failed to lseek to %" PRIu64 " offset for feature "
2672 "%d, continuing...\n", section->offset, feat);
2676 if (feat >= HEADER_LAST_FEATURE) {
2677 pr_debug("unknown feature %d, continuing...\n", feat);
2681 if (!feat_ops[feat].process)
2684 return feat_ops[feat].process(section, ph, fd, data);
2687 static int perf_file_header__read_pipe(struct perf_pipe_file_header *header,
2688 struct perf_header *ph, int fd,
2693 ret = readn(fd, header, sizeof(*header));
2697 if (check_magic_endian(header->magic, header->size, true, ph) < 0) {
2698 pr_debug("endian/magic failed\n");
2703 header->size = bswap_64(header->size);
2705 if (repipe && do_write(STDOUT_FILENO, header, sizeof(*header)) < 0)
2711 static int perf_header__read_pipe(struct perf_session *session)
2713 struct perf_header *header = &session->header;
2714 struct perf_pipe_file_header f_header;
2716 if (perf_file_header__read_pipe(&f_header, header,
2717 perf_data_file__fd(session->file),
2718 session->repipe) < 0) {
2719 pr_debug("incompatible file format\n");
2726 static int read_attr(int fd, struct perf_header *ph,
2727 struct perf_file_attr *f_attr)
2729 struct perf_event_attr *attr = &f_attr->attr;
2731 size_t our_sz = sizeof(f_attr->attr);
2734 memset(f_attr, 0, sizeof(*f_attr));
2736 /* read minimal guaranteed structure */
2737 ret = readn(fd, attr, PERF_ATTR_SIZE_VER0);
2739 pr_debug("cannot read %d bytes of header attr\n",
2740 PERF_ATTR_SIZE_VER0);
2744 /* on file perf_event_attr size */
2752 sz = PERF_ATTR_SIZE_VER0;
2753 } else if (sz > our_sz) {
2754 pr_debug("file uses a more recent and unsupported ABI"
2755 " (%zu bytes extra)\n", sz - our_sz);
2758 /* what we have not yet read and that we know about */
2759 left = sz - PERF_ATTR_SIZE_VER0;
2762 ptr += PERF_ATTR_SIZE_VER0;
2764 ret = readn(fd, ptr, left);
2766 /* read perf_file_section, ids are read in caller */
2767 ret = readn(fd, &f_attr->ids, sizeof(f_attr->ids));
2769 return ret <= 0 ? -1 : 0;
2772 static int perf_evsel__prepare_tracepoint_event(struct perf_evsel *evsel,
2773 struct pevent *pevent)
2775 struct event_format *event;
2778 /* already prepared */
2779 if (evsel->tp_format)
2782 if (pevent == NULL) {
2783 pr_debug("broken or missing trace data\n");
2787 event = pevent_find_event(pevent, evsel->attr.config);
2792 snprintf(bf, sizeof(bf), "%s:%s", event->system, event->name);
2793 evsel->name = strdup(bf);
2794 if (evsel->name == NULL)
2798 evsel->tp_format = event;
2802 static int perf_evlist__prepare_tracepoint_events(struct perf_evlist *evlist,
2803 struct pevent *pevent)
2805 struct perf_evsel *pos;
2807 evlist__for_each_entry(evlist, pos) {
2808 if (pos->attr.type == PERF_TYPE_TRACEPOINT &&
2809 perf_evsel__prepare_tracepoint_event(pos, pevent))
2816 int perf_session__read_header(struct perf_session *session)
2818 struct perf_data_file *file = session->file;
2819 struct perf_header *header = &session->header;
2820 struct perf_file_header f_header;
2821 struct perf_file_attr f_attr;
2823 int nr_attrs, nr_ids, i, j;
2824 int fd = perf_data_file__fd(file);
2826 session->evlist = perf_evlist__new();
2827 if (session->evlist == NULL)
2830 session->evlist->env = &header->env;
2831 session->machines.host.env = &header->env;
2832 if (perf_data_file__is_pipe(file))
2833 return perf_header__read_pipe(session);
2835 if (perf_file_header__read(&f_header, header, fd) < 0)
2839 * Sanity check that perf.data was written cleanly; data size is
2840 * initialized to 0 and updated only if the on_exit function is run.
2841 * If data size is still 0 then the file contains only partial
2842 * information. Just warn user and process it as much as it can.
2844 if (f_header.data.size == 0) {
2845 pr_warning("WARNING: The %s file's data size field is 0 which is unexpected.\n"
2846 "Was the 'perf record' command properly terminated?\n",
2850 nr_attrs = f_header.attrs.size / f_header.attr_size;
2851 lseek(fd, f_header.attrs.offset, SEEK_SET);
2853 for (i = 0; i < nr_attrs; i++) {
2854 struct perf_evsel *evsel;
2857 if (read_attr(fd, header, &f_attr) < 0)
2860 if (header->needs_swap) {
2861 f_attr.ids.size = bswap_64(f_attr.ids.size);
2862 f_attr.ids.offset = bswap_64(f_attr.ids.offset);
2863 perf_event__attr_swap(&f_attr.attr);
2866 tmp = lseek(fd, 0, SEEK_CUR);
2867 evsel = perf_evsel__new(&f_attr.attr);
2870 goto out_delete_evlist;
2872 evsel->needs_swap = header->needs_swap;
2874 * Do it before so that if perf_evsel__alloc_id fails, this
2875 * entry gets purged too at perf_evlist__delete().
2877 perf_evlist__add(session->evlist, evsel);
2879 nr_ids = f_attr.ids.size / sizeof(u64);
2881 * We don't have the cpu and thread maps on the header, so
2882 * for allocating the perf_sample_id table we fake 1 cpu and
2883 * hattr->ids threads.
2885 if (perf_evsel__alloc_id(evsel, 1, nr_ids))
2886 goto out_delete_evlist;
2888 lseek(fd, f_attr.ids.offset, SEEK_SET);
2890 for (j = 0; j < nr_ids; j++) {
2891 if (perf_header__getbuffer64(header, fd, &f_id, sizeof(f_id)))
2894 perf_evlist__id_add(session->evlist, evsel, 0, j, f_id);
2897 lseek(fd, tmp, SEEK_SET);
2900 symbol_conf.nr_events = nr_attrs;
2902 perf_header__process_sections(header, fd, &session->tevent,
2903 perf_file_section__process);
2905 if (perf_evlist__prepare_tracepoint_events(session->evlist,
2906 session->tevent.pevent))
2907 goto out_delete_evlist;
2914 perf_evlist__delete(session->evlist);
2915 session->evlist = NULL;
2919 int perf_event__synthesize_attr(struct perf_tool *tool,
2920 struct perf_event_attr *attr, u32 ids, u64 *id,
2921 perf_event__handler_t process)
2923 union perf_event *ev;
2927 size = sizeof(struct perf_event_attr);
2928 size = PERF_ALIGN(size, sizeof(u64));
2929 size += sizeof(struct perf_event_header);
2930 size += ids * sizeof(u64);
2937 ev->attr.attr = *attr;
2938 memcpy(ev->attr.id, id, ids * sizeof(u64));
2940 ev->attr.header.type = PERF_RECORD_HEADER_ATTR;
2941 ev->attr.header.size = (u16)size;
2943 if (ev->attr.header.size == size)
2944 err = process(tool, ev, NULL, NULL);
2953 static struct event_update_event *
2954 event_update_event__new(size_t size, u64 type, u64 id)
2956 struct event_update_event *ev;
2958 size += sizeof(*ev);
2959 size = PERF_ALIGN(size, sizeof(u64));
2963 ev->header.type = PERF_RECORD_EVENT_UPDATE;
2964 ev->header.size = (u16)size;
2972 perf_event__synthesize_event_update_unit(struct perf_tool *tool,
2973 struct perf_evsel *evsel,
2974 perf_event__handler_t process)
2976 struct event_update_event *ev;
2977 size_t size = strlen(evsel->unit);
2980 ev = event_update_event__new(size + 1, PERF_EVENT_UPDATE__UNIT, evsel->id[0]);
2984 strncpy(ev->data, evsel->unit, size);
2985 err = process(tool, (union perf_event *)ev, NULL, NULL);
2991 perf_event__synthesize_event_update_scale(struct perf_tool *tool,
2992 struct perf_evsel *evsel,
2993 perf_event__handler_t process)
2995 struct event_update_event *ev;
2996 struct event_update_event_scale *ev_data;
2999 ev = event_update_event__new(sizeof(*ev_data), PERF_EVENT_UPDATE__SCALE, evsel->id[0]);
3003 ev_data = (struct event_update_event_scale *) ev->data;
3004 ev_data->scale = evsel->scale;
3005 err = process(tool, (union perf_event*) ev, NULL, NULL);
3011 perf_event__synthesize_event_update_name(struct perf_tool *tool,
3012 struct perf_evsel *evsel,
3013 perf_event__handler_t process)
3015 struct event_update_event *ev;
3016 size_t len = strlen(evsel->name);
3019 ev = event_update_event__new(len + 1, PERF_EVENT_UPDATE__NAME, evsel->id[0]);
3023 strncpy(ev->data, evsel->name, len);
3024 err = process(tool, (union perf_event*) ev, NULL, NULL);
3030 perf_event__synthesize_event_update_cpus(struct perf_tool *tool,
3031 struct perf_evsel *evsel,
3032 perf_event__handler_t process)
3034 size_t size = sizeof(struct event_update_event);
3035 struct event_update_event *ev;
3039 if (!evsel->own_cpus)
3042 ev = cpu_map_data__alloc(evsel->own_cpus, &size, &type, &max);
3046 ev->header.type = PERF_RECORD_EVENT_UPDATE;
3047 ev->header.size = (u16)size;
3048 ev->type = PERF_EVENT_UPDATE__CPUS;
3049 ev->id = evsel->id[0];
3051 cpu_map_data__synthesize((struct cpu_map_data *) ev->data,
3055 err = process(tool, (union perf_event*) ev, NULL, NULL);
3060 size_t perf_event__fprintf_event_update(union perf_event *event, FILE *fp)
3062 struct event_update_event *ev = &event->event_update;
3063 struct event_update_event_scale *ev_scale;
3064 struct event_update_event_cpus *ev_cpus;
3065 struct cpu_map *map;
3068 ret = fprintf(fp, "\n... id: %" PRIu64 "\n", ev->id);
3071 case PERF_EVENT_UPDATE__SCALE:
3072 ev_scale = (struct event_update_event_scale *) ev->data;
3073 ret += fprintf(fp, "... scale: %f\n", ev_scale->scale);
3075 case PERF_EVENT_UPDATE__UNIT:
3076 ret += fprintf(fp, "... unit: %s\n", ev->data);
3078 case PERF_EVENT_UPDATE__NAME:
3079 ret += fprintf(fp, "... name: %s\n", ev->data);
3081 case PERF_EVENT_UPDATE__CPUS:
3082 ev_cpus = (struct event_update_event_cpus *) ev->data;
3083 ret += fprintf(fp, "... ");
3085 map = cpu_map__new_data(&ev_cpus->cpus);
3087 ret += cpu_map__fprintf(map, fp);
3089 ret += fprintf(fp, "failed to get cpus\n");
3092 ret += fprintf(fp, "... unknown type\n");
3099 int perf_event__synthesize_attrs(struct perf_tool *tool,
3100 struct perf_session *session,
3101 perf_event__handler_t process)
3103 struct perf_evsel *evsel;
3106 evlist__for_each_entry(session->evlist, evsel) {
3107 err = perf_event__synthesize_attr(tool, &evsel->attr, evsel->ids,
3108 evsel->id, process);
3110 pr_debug("failed to create perf header attribute\n");
3118 int perf_event__process_attr(struct perf_tool *tool __maybe_unused,
3119 union perf_event *event,
3120 struct perf_evlist **pevlist)
3123 struct perf_evsel *evsel;
3124 struct perf_evlist *evlist = *pevlist;
3126 if (evlist == NULL) {
3127 *pevlist = evlist = perf_evlist__new();
3132 evsel = perf_evsel__new(&event->attr.attr);
3136 perf_evlist__add(evlist, evsel);
3138 ids = event->header.size;
3139 ids -= (void *)&event->attr.id - (void *)event;
3140 n_ids = ids / sizeof(u64);
3142 * We don't have the cpu and thread maps on the header, so
3143 * for allocating the perf_sample_id table we fake 1 cpu and
3144 * hattr->ids threads.
3146 if (perf_evsel__alloc_id(evsel, 1, n_ids))
3149 for (i = 0; i < n_ids; i++) {
3150 perf_evlist__id_add(evlist, evsel, 0, i, event->attr.id[i]);
3153 symbol_conf.nr_events = evlist->nr_entries;
3158 int perf_event__process_event_update(struct perf_tool *tool __maybe_unused,
3159 union perf_event *event,
3160 struct perf_evlist **pevlist)
3162 struct event_update_event *ev = &event->event_update;
3163 struct event_update_event_scale *ev_scale;
3164 struct event_update_event_cpus *ev_cpus;
3165 struct perf_evlist *evlist;
3166 struct perf_evsel *evsel;
3167 struct cpu_map *map;
3169 if (!pevlist || *pevlist == NULL)
3174 evsel = perf_evlist__id2evsel(evlist, ev->id);
3179 case PERF_EVENT_UPDATE__UNIT:
3180 evsel->unit = strdup(ev->data);
3182 case PERF_EVENT_UPDATE__NAME:
3183 evsel->name = strdup(ev->data);
3185 case PERF_EVENT_UPDATE__SCALE:
3186 ev_scale = (struct event_update_event_scale *) ev->data;
3187 evsel->scale = ev_scale->scale;
3188 case PERF_EVENT_UPDATE__CPUS:
3189 ev_cpus = (struct event_update_event_cpus *) ev->data;
3191 map = cpu_map__new_data(&ev_cpus->cpus);
3193 evsel->own_cpus = map;
3195 pr_err("failed to get event_update cpus\n");
3203 int perf_event__synthesize_tracing_data(struct perf_tool *tool, int fd,
3204 struct perf_evlist *evlist,
3205 perf_event__handler_t process)
3207 union perf_event ev;
3208 struct tracing_data *tdata;
3209 ssize_t size = 0, aligned_size = 0, padding;
3210 int err __maybe_unused = 0;
3213 * We are going to store the size of the data followed
3214 * by the data contents. Since the fd descriptor is a pipe,
3215 * we cannot seek back to store the size of the data once
3216 * we know it. Instead we:
3218 * - write the tracing data to the temp file
3219 * - get/write the data size to pipe
3220 * - write the tracing data from the temp file
3223 tdata = tracing_data_get(&evlist->entries, fd, true);
3227 memset(&ev, 0, sizeof(ev));
3229 ev.tracing_data.header.type = PERF_RECORD_HEADER_TRACING_DATA;
3231 aligned_size = PERF_ALIGN(size, sizeof(u64));
3232 padding = aligned_size - size;
3233 ev.tracing_data.header.size = sizeof(ev.tracing_data);
3234 ev.tracing_data.size = aligned_size;
3236 process(tool, &ev, NULL, NULL);
3239 * The put function will copy all the tracing data
3240 * stored in temp file to the pipe.
3242 tracing_data_put(tdata);
3244 write_padded(fd, NULL, 0, padding);
3246 return aligned_size;
3249 int perf_event__process_tracing_data(struct perf_tool *tool __maybe_unused,
3250 union perf_event *event,
3251 struct perf_session *session)
3253 ssize_t size_read, padding, size = event->tracing_data.size;
3254 int fd = perf_data_file__fd(session->file);
3255 off_t offset = lseek(fd, 0, SEEK_CUR);
3258 /* setup for reading amidst mmap */
3259 lseek(fd, offset + sizeof(struct tracing_data_event),
3262 size_read = trace_report(fd, &session->tevent,
3264 padding = PERF_ALIGN(size_read, sizeof(u64)) - size_read;
3266 if (readn(fd, buf, padding) < 0) {
3267 pr_err("%s: reading input file", __func__);
3270 if (session->repipe) {
3271 int retw = write(STDOUT_FILENO, buf, padding);
3272 if (retw <= 0 || retw != padding) {
3273 pr_err("%s: repiping tracing data padding", __func__);
3278 if (size_read + padding != size) {
3279 pr_err("%s: tracing data size mismatch", __func__);
3283 perf_evlist__prepare_tracepoint_events(session->evlist,
3284 session->tevent.pevent);
3286 return size_read + padding;
3289 int perf_event__synthesize_build_id(struct perf_tool *tool,
3290 struct dso *pos, u16 misc,
3291 perf_event__handler_t process,
3292 struct machine *machine)
3294 union perf_event ev;
3301 memset(&ev, 0, sizeof(ev));
3303 len = pos->long_name_len + 1;
3304 len = PERF_ALIGN(len, NAME_ALIGN);
3305 memcpy(&ev.build_id.build_id, pos->build_id, sizeof(pos->build_id));
3306 ev.build_id.header.type = PERF_RECORD_HEADER_BUILD_ID;
3307 ev.build_id.header.misc = misc;
3308 ev.build_id.pid = machine->pid;
3309 ev.build_id.header.size = sizeof(ev.build_id) + len;
3310 memcpy(&ev.build_id.filename, pos->long_name, pos->long_name_len);
3312 err = process(tool, &ev, NULL, machine);
3317 int perf_event__process_build_id(struct perf_tool *tool __maybe_unused,
3318 union perf_event *event,
3319 struct perf_session *session)
3321 __event_process_build_id(&event->build_id,
3322 event->build_id.filename,