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 const char perf_version_string[] = PERF_VERSION;
46 struct perf_file_attr {
47 struct perf_event_attr attr;
48 struct perf_file_section ids;
51 void perf_header__set_feat(struct perf_header *header, int feat)
53 set_bit(feat, header->adds_features);
56 void perf_header__clear_feat(struct perf_header *header, int feat)
58 clear_bit(feat, header->adds_features);
61 bool perf_header__has_feat(const struct perf_header *header, int feat)
63 return test_bit(feat, header->adds_features);
66 static int do_write(int fd, const void *buf, size_t size)
69 int ret = write(fd, buf, size);
81 int write_padded(int fd, const void *bf, size_t count, size_t count_aligned)
83 static const char zero_buf[NAME_ALIGN];
84 int err = do_write(fd, bf, count);
87 err = do_write(fd, zero_buf, count_aligned - count);
92 #define string_size(str) \
93 (PERF_ALIGN((strlen(str) + 1), NAME_ALIGN) + sizeof(u32))
95 static int do_write_string(int fd, const char *str)
100 olen = strlen(str) + 1;
101 len = PERF_ALIGN(olen, NAME_ALIGN);
103 /* write len, incl. \0 */
104 ret = do_write(fd, &len, sizeof(len));
108 return write_padded(fd, str, olen, len);
111 static char *do_read_string(int fd, struct perf_header *ph)
117 sz = readn(fd, &len, sizeof(len));
118 if (sz < (ssize_t)sizeof(len))
128 ret = readn(fd, buf, len);
129 if (ret == (ssize_t)len) {
131 * strings are padded by zeroes
132 * thus the actual strlen of buf
133 * may be less than len
142 static int write_tracing_data(int fd, struct perf_header *h __maybe_unused,
143 struct perf_evlist *evlist)
145 return read_tracing_data(fd, &evlist->entries);
149 static int write_build_id(int fd, struct perf_header *h,
150 struct perf_evlist *evlist __maybe_unused)
152 struct perf_session *session;
155 session = container_of(h, struct perf_session, header);
157 if (!perf_session__read_build_ids(session, true))
160 err = perf_session__write_buildid_table(session, fd);
162 pr_debug("failed to write buildid table\n");
165 perf_session__cache_build_ids(session);
170 static int write_hostname(int fd, struct perf_header *h __maybe_unused,
171 struct perf_evlist *evlist __maybe_unused)
180 return do_write_string(fd, uts.nodename);
183 static int write_osrelease(int fd, struct perf_header *h __maybe_unused,
184 struct perf_evlist *evlist __maybe_unused)
193 return do_write_string(fd, uts.release);
196 static int write_arch(int fd, struct perf_header *h __maybe_unused,
197 struct perf_evlist *evlist __maybe_unused)
206 return do_write_string(fd, uts.machine);
209 static int write_version(int fd, struct perf_header *h __maybe_unused,
210 struct perf_evlist *evlist __maybe_unused)
212 return do_write_string(fd, perf_version_string);
215 static int __write_cpudesc(int fd, const char *cpuinfo_proc)
220 const char *search = cpuinfo_proc;
227 file = fopen("/proc/cpuinfo", "r");
231 while (getline(&buf, &len, file) > 0) {
232 ret = strncmp(buf, search, strlen(search));
244 p = strchr(buf, ':');
245 if (p && *(p+1) == ' ' && *(p+2))
251 /* squash extra space characters (branding string) */
258 while (*q && isspace(*q))
261 while ((*r++ = *q++));
265 ret = do_write_string(fd, s);
272 static int write_cpudesc(int fd, struct perf_header *h __maybe_unused,
273 struct perf_evlist *evlist __maybe_unused)
276 #define CPUINFO_PROC {"model name", }
278 const char *cpuinfo_procs[] = CPUINFO_PROC;
281 for (i = 0; i < ARRAY_SIZE(cpuinfo_procs); i++) {
283 ret = __write_cpudesc(fd, cpuinfo_procs[i]);
291 static int write_nrcpus(int fd, struct perf_header *h __maybe_unused,
292 struct perf_evlist *evlist __maybe_unused)
298 nr = sysconf(_SC_NPROCESSORS_CONF);
302 nrc = (u32)(nr & UINT_MAX);
304 nr = sysconf(_SC_NPROCESSORS_ONLN);
308 nra = (u32)(nr & UINT_MAX);
310 ret = do_write(fd, &nrc, sizeof(nrc));
314 return do_write(fd, &nra, sizeof(nra));
317 static int write_event_desc(int fd, struct perf_header *h __maybe_unused,
318 struct perf_evlist *evlist)
320 struct perf_evsel *evsel;
324 nre = evlist->nr_entries;
327 * write number of events
329 ret = do_write(fd, &nre, sizeof(nre));
334 * size of perf_event_attr struct
336 sz = (u32)sizeof(evsel->attr);
337 ret = do_write(fd, &sz, sizeof(sz));
341 evlist__for_each_entry(evlist, evsel) {
342 ret = do_write(fd, &evsel->attr, sz);
346 * write number of unique id per event
347 * there is one id per instance of an event
349 * copy into an nri to be independent of the
353 ret = do_write(fd, &nri, sizeof(nri));
358 * write event string as passed on cmdline
360 ret = do_write_string(fd, perf_evsel__name(evsel));
364 * write unique ids for this event
366 ret = do_write(fd, evsel->id, evsel->ids * sizeof(u64));
373 static int write_cmdline(int fd, struct perf_header *h __maybe_unused,
374 struct perf_evlist *evlist __maybe_unused)
376 char buf[MAXPATHLEN];
382 * actual atual path to perf binary
384 sprintf(proc, "/proc/%d/exe", getpid());
385 ret = readlink(proc, buf, sizeof(buf));
389 /* readlink() does not add null termination */
392 /* account for binary path */
393 n = perf_env.nr_cmdline + 1;
395 ret = do_write(fd, &n, sizeof(n));
399 ret = do_write_string(fd, buf);
403 for (i = 0 ; i < perf_env.nr_cmdline; i++) {
404 ret = do_write_string(fd, perf_env.cmdline_argv[i]);
411 #define CORE_SIB_FMT \
412 "/sys/devices/system/cpu/cpu%d/topology/core_siblings_list"
413 #define THRD_SIB_FMT \
414 "/sys/devices/system/cpu/cpu%d/topology/thread_siblings_list"
420 char **core_siblings;
421 char **thread_siblings;
424 static int build_cpu_topo(struct cpu_topo *tp, int cpu)
427 char filename[MAXPATHLEN];
428 char *buf = NULL, *p;
434 sprintf(filename, CORE_SIB_FMT, cpu);
435 fp = fopen(filename, "r");
439 sret = getline(&buf, &len, fp);
444 p = strchr(buf, '\n');
448 for (i = 0; i < tp->core_sib; i++) {
449 if (!strcmp(buf, tp->core_siblings[i]))
452 if (i == tp->core_sib) {
453 tp->core_siblings[i] = buf;
461 sprintf(filename, THRD_SIB_FMT, cpu);
462 fp = fopen(filename, "r");
466 if (getline(&buf, &len, fp) <= 0)
469 p = strchr(buf, '\n');
473 for (i = 0; i < tp->thread_sib; i++) {
474 if (!strcmp(buf, tp->thread_siblings[i]))
477 if (i == tp->thread_sib) {
478 tp->thread_siblings[i] = buf;
490 static void free_cpu_topo(struct cpu_topo *tp)
497 for (i = 0 ; i < tp->core_sib; i++)
498 zfree(&tp->core_siblings[i]);
500 for (i = 0 ; i < tp->thread_sib; i++)
501 zfree(&tp->thread_siblings[i]);
506 static struct cpu_topo *build_cpu_topology(void)
515 ncpus = sysconf(_SC_NPROCESSORS_CONF);
519 nr = (u32)(ncpus & UINT_MAX);
521 sz = nr * sizeof(char *);
523 addr = calloc(1, sizeof(*tp) + 2 * sz);
530 tp->core_siblings = addr;
532 tp->thread_siblings = addr;
534 for (i = 0; i < nr; i++) {
535 ret = build_cpu_topo(tp, i);
546 static int write_cpu_topology(int fd, struct perf_header *h __maybe_unused,
547 struct perf_evlist *evlist __maybe_unused)
553 tp = build_cpu_topology();
557 ret = do_write(fd, &tp->core_sib, sizeof(tp->core_sib));
561 for (i = 0; i < tp->core_sib; i++) {
562 ret = do_write_string(fd, tp->core_siblings[i]);
566 ret = do_write(fd, &tp->thread_sib, sizeof(tp->thread_sib));
570 for (i = 0; i < tp->thread_sib; i++) {
571 ret = do_write_string(fd, tp->thread_siblings[i]);
576 ret = perf_env__read_cpu_topology_map(&perf_env);
580 for (j = 0; j < perf_env.nr_cpus_avail; j++) {
581 ret = do_write(fd, &perf_env.cpu[j].core_id,
582 sizeof(perf_env.cpu[j].core_id));
585 ret = do_write(fd, &perf_env.cpu[j].socket_id,
586 sizeof(perf_env.cpu[j].socket_id));
597 static int write_total_mem(int fd, struct perf_header *h __maybe_unused,
598 struct perf_evlist *evlist __maybe_unused)
606 fp = fopen("/proc/meminfo", "r");
610 while (getline(&buf, &len, fp) > 0) {
611 ret = strncmp(buf, "MemTotal:", 9);
616 n = sscanf(buf, "%*s %"PRIu64, &mem);
618 ret = do_write(fd, &mem, sizeof(mem));
626 static int write_topo_node(int fd, int node)
628 char str[MAXPATHLEN];
630 char *buf = NULL, *p;
633 u64 mem_total, mem_free, mem;
636 sprintf(str, "/sys/devices/system/node/node%d/meminfo", node);
637 fp = fopen(str, "r");
641 while (getline(&buf, &len, fp) > 0) {
642 /* skip over invalid lines */
643 if (!strchr(buf, ':'))
645 if (sscanf(buf, "%*s %*d %31s %"PRIu64, field, &mem) != 2)
647 if (!strcmp(field, "MemTotal:"))
649 if (!strcmp(field, "MemFree:"))
656 ret = do_write(fd, &mem_total, sizeof(u64));
660 ret = do_write(fd, &mem_free, sizeof(u64));
665 sprintf(str, "/sys/devices/system/node/node%d/cpulist", node);
667 fp = fopen(str, "r");
671 if (getline(&buf, &len, fp) <= 0)
674 p = strchr(buf, '\n');
678 ret = do_write_string(fd, buf);
686 static int write_numa_topology(int fd, struct perf_header *h __maybe_unused,
687 struct perf_evlist *evlist __maybe_unused)
692 struct cpu_map *node_map = NULL;
697 fp = fopen("/sys/devices/system/node/online", "r");
701 if (getline(&buf, &len, fp) <= 0)
704 c = strchr(buf, '\n');
708 node_map = cpu_map__new(buf);
712 nr = (u32)node_map->nr;
714 ret = do_write(fd, &nr, sizeof(nr));
718 for (i = 0; i < nr; i++) {
719 j = (u32)node_map->map[i];
720 ret = do_write(fd, &j, sizeof(j));
724 ret = write_topo_node(fd, i);
731 cpu_map__put(node_map);
738 * struct pmu_mappings {
747 static int write_pmu_mappings(int fd, struct perf_header *h __maybe_unused,
748 struct perf_evlist *evlist __maybe_unused)
750 struct perf_pmu *pmu = NULL;
751 off_t offset = lseek(fd, 0, SEEK_CUR);
755 /* write real pmu_num later */
756 ret = do_write(fd, &pmu_num, sizeof(pmu_num));
760 while ((pmu = perf_pmu__scan(pmu))) {
765 ret = do_write(fd, &pmu->type, sizeof(pmu->type));
769 ret = do_write_string(fd, pmu->name);
774 if (pwrite(fd, &pmu_num, sizeof(pmu_num), offset) != sizeof(pmu_num)) {
776 lseek(fd, offset, SEEK_SET);
786 * struct group_descs {
788 * struct group_desc {
795 static int write_group_desc(int fd, struct perf_header *h __maybe_unused,
796 struct perf_evlist *evlist)
798 u32 nr_groups = evlist->nr_groups;
799 struct perf_evsel *evsel;
802 ret = do_write(fd, &nr_groups, sizeof(nr_groups));
806 evlist__for_each_entry(evlist, evsel) {
807 if (perf_evsel__is_group_leader(evsel) &&
808 evsel->nr_members > 1) {
809 const char *name = evsel->group_name ?: "{anon_group}";
810 u32 leader_idx = evsel->idx;
811 u32 nr_members = evsel->nr_members;
813 ret = do_write_string(fd, name);
817 ret = do_write(fd, &leader_idx, sizeof(leader_idx));
821 ret = do_write(fd, &nr_members, sizeof(nr_members));
830 * default get_cpuid(): nothing gets recorded
831 * actual implementation must be in arch/$(ARCH)/util/header.c
833 int __weak get_cpuid(char *buffer __maybe_unused, size_t sz __maybe_unused)
838 static int write_cpuid(int fd, struct perf_header *h __maybe_unused,
839 struct perf_evlist *evlist __maybe_unused)
844 ret = get_cpuid(buffer, sizeof(buffer));
850 return do_write_string(fd, buffer);
853 static int write_branch_stack(int fd __maybe_unused,
854 struct perf_header *h __maybe_unused,
855 struct perf_evlist *evlist __maybe_unused)
860 static int write_auxtrace(int fd, struct perf_header *h,
861 struct perf_evlist *evlist __maybe_unused)
863 struct perf_session *session;
866 session = container_of(h, struct perf_session, header);
868 err = auxtrace_index__write(fd, &session->auxtrace_index);
870 pr_err("Failed to write auxtrace index\n");
874 static int cpu_cache_level__sort(const void *a, const void *b)
876 struct cpu_cache_level *cache_a = (struct cpu_cache_level *)a;
877 struct cpu_cache_level *cache_b = (struct cpu_cache_level *)b;
879 return cache_a->level - cache_b->level;
882 static bool cpu_cache_level__cmp(struct cpu_cache_level *a, struct cpu_cache_level *b)
884 if (a->level != b->level)
887 if (a->line_size != b->line_size)
890 if (a->sets != b->sets)
893 if (a->ways != b->ways)
896 if (strcmp(a->type, b->type))
899 if (strcmp(a->size, b->size))
902 if (strcmp(a->map, b->map))
908 static int cpu_cache_level__read(struct cpu_cache_level *cache, u32 cpu, u16 level)
910 char path[PATH_MAX], file[PATH_MAX];
914 scnprintf(path, PATH_MAX, "devices/system/cpu/cpu%d/cache/index%d/", cpu, level);
915 scnprintf(file, PATH_MAX, "%s/%s", sysfs__mountpoint(), path);
920 scnprintf(file, PATH_MAX, "%s/level", path);
921 if (sysfs__read_int(file, (int *) &cache->level))
924 scnprintf(file, PATH_MAX, "%s/coherency_line_size", path);
925 if (sysfs__read_int(file, (int *) &cache->line_size))
928 scnprintf(file, PATH_MAX, "%s/number_of_sets", path);
929 if (sysfs__read_int(file, (int *) &cache->sets))
932 scnprintf(file, PATH_MAX, "%s/ways_of_associativity", path);
933 if (sysfs__read_int(file, (int *) &cache->ways))
936 scnprintf(file, PATH_MAX, "%s/type", path);
937 if (sysfs__read_str(file, &cache->type, &len))
940 cache->type[len] = 0;
941 cache->type = rtrim(cache->type);
943 scnprintf(file, PATH_MAX, "%s/size", path);
944 if (sysfs__read_str(file, &cache->size, &len)) {
949 cache->size[len] = 0;
950 cache->size = rtrim(cache->size);
952 scnprintf(file, PATH_MAX, "%s/shared_cpu_list", path);
953 if (sysfs__read_str(file, &cache->map, &len)) {
960 cache->map = rtrim(cache->map);
964 static void cpu_cache_level__fprintf(FILE *out, struct cpu_cache_level *c)
966 fprintf(out, "L%d %-15s %8s [%s]\n", c->level, c->type, c->size, c->map);
969 static int build_caches(struct cpu_cache_level caches[], u32 size, u32 *cntp)
976 ncpus = sysconf(_SC_NPROCESSORS_CONF);
980 nr = (u32)(ncpus & UINT_MAX);
982 for (cpu = 0; cpu < nr; cpu++) {
983 for (level = 0; level < 10; level++) {
984 struct cpu_cache_level c;
987 err = cpu_cache_level__read(&c, cpu, level);
994 for (i = 0; i < cnt; i++) {
995 if (cpu_cache_level__cmp(&c, &caches[i]))
1002 cpu_cache_level__free(&c);
1004 if (WARN_ONCE(cnt == size, "way too many cpu caches.."))
1013 #define MAX_CACHES 2000
1015 static int write_cache(int fd, struct perf_header *h __maybe_unused,
1016 struct perf_evlist *evlist __maybe_unused)
1018 struct cpu_cache_level caches[MAX_CACHES];
1019 u32 cnt = 0, i, version = 1;
1022 ret = build_caches(caches, MAX_CACHES, &cnt);
1026 qsort(&caches, cnt, sizeof(struct cpu_cache_level), cpu_cache_level__sort);
1028 ret = do_write(fd, &version, sizeof(u32));
1032 ret = do_write(fd, &cnt, sizeof(u32));
1036 for (i = 0; i < cnt; i++) {
1037 struct cpu_cache_level *c = &caches[i];
1040 ret = do_write(fd, &c->v, sizeof(u32)); \
1051 ret = do_write_string(fd, (const char *) c->v); \
1062 for (i = 0; i < cnt; i++)
1063 cpu_cache_level__free(&caches[i]);
1067 static int write_stat(int fd __maybe_unused,
1068 struct perf_header *h __maybe_unused,
1069 struct perf_evlist *evlist __maybe_unused)
1074 static void print_hostname(struct perf_header *ph, int fd __maybe_unused,
1077 fprintf(fp, "# hostname : %s\n", ph->env.hostname);
1080 static void print_osrelease(struct perf_header *ph, int fd __maybe_unused,
1083 fprintf(fp, "# os release : %s\n", ph->env.os_release);
1086 static void print_arch(struct perf_header *ph, int fd __maybe_unused, FILE *fp)
1088 fprintf(fp, "# arch : %s\n", ph->env.arch);
1091 static void print_cpudesc(struct perf_header *ph, int fd __maybe_unused,
1094 fprintf(fp, "# cpudesc : %s\n", ph->env.cpu_desc);
1097 static void print_nrcpus(struct perf_header *ph, int fd __maybe_unused,
1100 fprintf(fp, "# nrcpus online : %u\n", ph->env.nr_cpus_online);
1101 fprintf(fp, "# nrcpus avail : %u\n", ph->env.nr_cpus_avail);
1104 static void print_version(struct perf_header *ph, int fd __maybe_unused,
1107 fprintf(fp, "# perf version : %s\n", ph->env.version);
1110 static void print_cmdline(struct perf_header *ph, int fd __maybe_unused,
1115 nr = ph->env.nr_cmdline;
1117 fprintf(fp, "# cmdline : ");
1119 for (i = 0; i < nr; i++)
1120 fprintf(fp, "%s ", ph->env.cmdline_argv[i]);
1124 static void print_cpu_topology(struct perf_header *ph, int fd __maybe_unused,
1129 int cpu_nr = ph->env.nr_cpus_online;
1131 nr = ph->env.nr_sibling_cores;
1132 str = ph->env.sibling_cores;
1134 for (i = 0; i < nr; i++) {
1135 fprintf(fp, "# sibling cores : %s\n", str);
1136 str += strlen(str) + 1;
1139 nr = ph->env.nr_sibling_threads;
1140 str = ph->env.sibling_threads;
1142 for (i = 0; i < nr; i++) {
1143 fprintf(fp, "# sibling threads : %s\n", str);
1144 str += strlen(str) + 1;
1147 if (ph->env.cpu != NULL) {
1148 for (i = 0; i < cpu_nr; i++)
1149 fprintf(fp, "# CPU %d: Core ID %d, Socket ID %d\n", i,
1150 ph->env.cpu[i].core_id, ph->env.cpu[i].socket_id);
1152 fprintf(fp, "# Core ID and Socket ID information is not available\n");
1155 static void free_event_desc(struct perf_evsel *events)
1157 struct perf_evsel *evsel;
1162 for (evsel = events; evsel->attr.size; evsel++) {
1163 zfree(&evsel->name);
1170 static struct perf_evsel *
1171 read_event_desc(struct perf_header *ph, int fd)
1173 struct perf_evsel *evsel, *events = NULL;
1176 u32 nre, sz, nr, i, j;
1180 /* number of events */
1181 ret = readn(fd, &nre, sizeof(nre));
1182 if (ret != (ssize_t)sizeof(nre))
1186 nre = bswap_32(nre);
1188 ret = readn(fd, &sz, sizeof(sz));
1189 if (ret != (ssize_t)sizeof(sz))
1195 /* buffer to hold on file attr struct */
1200 /* the last event terminates with evsel->attr.size == 0: */
1201 events = calloc(nre + 1, sizeof(*events));
1205 msz = sizeof(evsel->attr);
1209 for (i = 0, evsel = events; i < nre; evsel++, i++) {
1213 * must read entire on-file attr struct to
1214 * sync up with layout.
1216 ret = readn(fd, buf, sz);
1217 if (ret != (ssize_t)sz)
1221 perf_event__attr_swap(buf);
1223 memcpy(&evsel->attr, buf, msz);
1225 ret = readn(fd, &nr, sizeof(nr));
1226 if (ret != (ssize_t)sizeof(nr))
1229 if (ph->needs_swap) {
1231 evsel->needs_swap = true;
1234 evsel->name = do_read_string(fd, ph);
1239 id = calloc(nr, sizeof(*id));
1245 for (j = 0 ; j < nr; j++) {
1246 ret = readn(fd, id, sizeof(*id));
1247 if (ret != (ssize_t)sizeof(*id))
1250 *id = bswap_64(*id);
1258 free_event_desc(events);
1263 static int __desc_attr__fprintf(FILE *fp, const char *name, const char *val,
1264 void *priv __attribute__((unused)))
1266 return fprintf(fp, ", %s = %s", name, val);
1269 static void print_event_desc(struct perf_header *ph, int fd, FILE *fp)
1271 struct perf_evsel *evsel, *events = read_event_desc(ph, fd);
1276 fprintf(fp, "# event desc: not available or unable to read\n");
1280 for (evsel = events; evsel->attr.size; evsel++) {
1281 fprintf(fp, "# event : name = %s, ", evsel->name);
1284 fprintf(fp, ", id = {");
1285 for (j = 0, id = evsel->id; j < evsel->ids; j++, id++) {
1288 fprintf(fp, " %"PRIu64, *id);
1293 perf_event_attr__fprintf(fp, &evsel->attr, __desc_attr__fprintf, NULL);
1298 free_event_desc(events);
1301 static void print_total_mem(struct perf_header *ph, int fd __maybe_unused,
1304 fprintf(fp, "# total memory : %Lu kB\n", ph->env.total_mem);
1307 static void print_numa_topology(struct perf_header *ph, int fd __maybe_unused,
1311 struct numa_node *n;
1313 for (i = 0; i < ph->env.nr_numa_nodes; i++) {
1314 n = &ph->env.numa_nodes[i];
1316 fprintf(fp, "# node%u meminfo : total = %"PRIu64" kB,"
1317 " free = %"PRIu64" kB\n",
1318 n->node, n->mem_total, n->mem_free);
1320 fprintf(fp, "# node%u cpu list : ", n->node);
1321 cpu_map__fprintf(n->map, fp);
1325 static void print_cpuid(struct perf_header *ph, int fd __maybe_unused, FILE *fp)
1327 fprintf(fp, "# cpuid : %s\n", ph->env.cpuid);
1330 static void print_branch_stack(struct perf_header *ph __maybe_unused,
1331 int fd __maybe_unused, FILE *fp)
1333 fprintf(fp, "# contains samples with branch stack\n");
1336 static void print_auxtrace(struct perf_header *ph __maybe_unused,
1337 int fd __maybe_unused, FILE *fp)
1339 fprintf(fp, "# contains AUX area data (e.g. instruction trace)\n");
1342 static void print_stat(struct perf_header *ph __maybe_unused,
1343 int fd __maybe_unused, FILE *fp)
1345 fprintf(fp, "# contains stat data\n");
1348 static void print_cache(struct perf_header *ph __maybe_unused,
1349 int fd __maybe_unused, FILE *fp __maybe_unused)
1353 fprintf(fp, "# CPU cache info:\n");
1354 for (i = 0; i < ph->env.caches_cnt; i++) {
1356 cpu_cache_level__fprintf(fp, &ph->env.caches[i]);
1360 static void print_pmu_mappings(struct perf_header *ph, int fd __maybe_unused,
1363 const char *delimiter = "# pmu mappings: ";
1368 pmu_num = ph->env.nr_pmu_mappings;
1370 fprintf(fp, "# pmu mappings: not available\n");
1374 str = ph->env.pmu_mappings;
1377 type = strtoul(str, &tmp, 0);
1382 fprintf(fp, "%s%s = %" PRIu32, delimiter, str, type);
1385 str += strlen(str) + 1;
1394 fprintf(fp, "# pmu mappings: unable to read\n");
1397 static void print_group_desc(struct perf_header *ph, int fd __maybe_unused,
1400 struct perf_session *session;
1401 struct perf_evsel *evsel;
1404 session = container_of(ph, struct perf_session, header);
1406 evlist__for_each_entry(session->evlist, evsel) {
1407 if (perf_evsel__is_group_leader(evsel) &&
1408 evsel->nr_members > 1) {
1409 fprintf(fp, "# group: %s{%s", evsel->group_name ?: "",
1410 perf_evsel__name(evsel));
1412 nr = evsel->nr_members - 1;
1414 fprintf(fp, ",%s", perf_evsel__name(evsel));
1422 static int __event_process_build_id(struct build_id_event *bev,
1424 struct perf_session *session)
1427 struct machine *machine;
1430 enum dso_kernel_type dso_type;
1432 machine = perf_session__findnew_machine(session, bev->pid);
1436 cpumode = bev->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
1439 case PERF_RECORD_MISC_KERNEL:
1440 dso_type = DSO_TYPE_KERNEL;
1442 case PERF_RECORD_MISC_GUEST_KERNEL:
1443 dso_type = DSO_TYPE_GUEST_KERNEL;
1445 case PERF_RECORD_MISC_USER:
1446 case PERF_RECORD_MISC_GUEST_USER:
1447 dso_type = DSO_TYPE_USER;
1453 dso = machine__findnew_dso(machine, filename);
1455 char sbuild_id[SBUILD_ID_SIZE];
1457 dso__set_build_id(dso, &bev->build_id);
1459 if (!is_kernel_module(filename, cpumode))
1460 dso->kernel = dso_type;
1462 build_id__sprintf(dso->build_id, sizeof(dso->build_id),
1464 pr_debug("build id event received for %s: %s\n",
1465 dso->long_name, sbuild_id);
1474 static int perf_header__read_build_ids_abi_quirk(struct perf_header *header,
1475 int input, u64 offset, u64 size)
1477 struct perf_session *session = container_of(header, struct perf_session, header);
1479 struct perf_event_header header;
1480 u8 build_id[PERF_ALIGN(BUILD_ID_SIZE, sizeof(u64))];
1483 struct build_id_event bev;
1484 char filename[PATH_MAX];
1485 u64 limit = offset + size;
1487 while (offset < limit) {
1490 if (readn(input, &old_bev, sizeof(old_bev)) != sizeof(old_bev))
1493 if (header->needs_swap)
1494 perf_event_header__bswap(&old_bev.header);
1496 len = old_bev.header.size - sizeof(old_bev);
1497 if (readn(input, filename, len) != len)
1500 bev.header = old_bev.header;
1503 * As the pid is the missing value, we need to fill
1504 * it properly. The header.misc value give us nice hint.
1506 bev.pid = HOST_KERNEL_ID;
1507 if (bev.header.misc == PERF_RECORD_MISC_GUEST_USER ||
1508 bev.header.misc == PERF_RECORD_MISC_GUEST_KERNEL)
1509 bev.pid = DEFAULT_GUEST_KERNEL_ID;
1511 memcpy(bev.build_id, old_bev.build_id, sizeof(bev.build_id));
1512 __event_process_build_id(&bev, filename, session);
1514 offset += bev.header.size;
1520 static int perf_header__read_build_ids(struct perf_header *header,
1521 int input, u64 offset, u64 size)
1523 struct perf_session *session = container_of(header, struct perf_session, header);
1524 struct build_id_event bev;
1525 char filename[PATH_MAX];
1526 u64 limit = offset + size, orig_offset = offset;
1529 while (offset < limit) {
1532 if (readn(input, &bev, sizeof(bev)) != sizeof(bev))
1535 if (header->needs_swap)
1536 perf_event_header__bswap(&bev.header);
1538 len = bev.header.size - sizeof(bev);
1539 if (readn(input, filename, len) != len)
1542 * The a1645ce1 changeset:
1544 * "perf: 'perf kvm' tool for monitoring guest performance from host"
1546 * Added a field to struct build_id_event that broke the file
1549 * Since the kernel build-id is the first entry, process the
1550 * table using the old format if the well known
1551 * '[kernel.kallsyms]' string for the kernel build-id has the
1552 * first 4 characters chopped off (where the pid_t sits).
1554 if (memcmp(filename, "nel.kallsyms]", 13) == 0) {
1555 if (lseek(input, orig_offset, SEEK_SET) == (off_t)-1)
1557 return perf_header__read_build_ids_abi_quirk(header, input, offset, size);
1560 __event_process_build_id(&bev, filename, session);
1562 offset += bev.header.size;
1569 static int process_tracing_data(struct perf_file_section *section __maybe_unused,
1570 struct perf_header *ph __maybe_unused,
1573 ssize_t ret = trace_report(fd, data, false);
1574 return ret < 0 ? -1 : 0;
1577 static int process_build_id(struct perf_file_section *section,
1578 struct perf_header *ph, int fd,
1579 void *data __maybe_unused)
1581 if (perf_header__read_build_ids(ph, fd, section->offset, section->size))
1582 pr_debug("Failed to read buildids, continuing...\n");
1586 static int process_hostname(struct perf_file_section *section __maybe_unused,
1587 struct perf_header *ph, int fd,
1588 void *data __maybe_unused)
1590 ph->env.hostname = do_read_string(fd, ph);
1591 return ph->env.hostname ? 0 : -ENOMEM;
1594 static int process_osrelease(struct perf_file_section *section __maybe_unused,
1595 struct perf_header *ph, int fd,
1596 void *data __maybe_unused)
1598 ph->env.os_release = do_read_string(fd, ph);
1599 return ph->env.os_release ? 0 : -ENOMEM;
1602 static int process_version(struct perf_file_section *section __maybe_unused,
1603 struct perf_header *ph, int fd,
1604 void *data __maybe_unused)
1606 ph->env.version = do_read_string(fd, ph);
1607 return ph->env.version ? 0 : -ENOMEM;
1610 static int process_arch(struct perf_file_section *section __maybe_unused,
1611 struct perf_header *ph, int fd,
1612 void *data __maybe_unused)
1614 ph->env.arch = do_read_string(fd, ph);
1615 return ph->env.arch ? 0 : -ENOMEM;
1618 static int process_nrcpus(struct perf_file_section *section __maybe_unused,
1619 struct perf_header *ph, int fd,
1620 void *data __maybe_unused)
1625 ret = readn(fd, &nr, sizeof(nr));
1626 if (ret != sizeof(nr))
1632 ph->env.nr_cpus_avail = nr;
1634 ret = readn(fd, &nr, sizeof(nr));
1635 if (ret != sizeof(nr))
1641 ph->env.nr_cpus_online = nr;
1645 static int process_cpudesc(struct perf_file_section *section __maybe_unused,
1646 struct perf_header *ph, int fd,
1647 void *data __maybe_unused)
1649 ph->env.cpu_desc = do_read_string(fd, ph);
1650 return ph->env.cpu_desc ? 0 : -ENOMEM;
1653 static int process_cpuid(struct perf_file_section *section __maybe_unused,
1654 struct perf_header *ph, int fd,
1655 void *data __maybe_unused)
1657 ph->env.cpuid = do_read_string(fd, ph);
1658 return ph->env.cpuid ? 0 : -ENOMEM;
1661 static int process_total_mem(struct perf_file_section *section __maybe_unused,
1662 struct perf_header *ph, int fd,
1663 void *data __maybe_unused)
1668 ret = readn(fd, &mem, sizeof(mem));
1669 if (ret != sizeof(mem))
1673 mem = bswap_64(mem);
1675 ph->env.total_mem = mem;
1679 static struct perf_evsel *
1680 perf_evlist__find_by_index(struct perf_evlist *evlist, int idx)
1682 struct perf_evsel *evsel;
1684 evlist__for_each_entry(evlist, evsel) {
1685 if (evsel->idx == idx)
1693 perf_evlist__set_event_name(struct perf_evlist *evlist,
1694 struct perf_evsel *event)
1696 struct perf_evsel *evsel;
1701 evsel = perf_evlist__find_by_index(evlist, event->idx);
1708 evsel->name = strdup(event->name);
1712 process_event_desc(struct perf_file_section *section __maybe_unused,
1713 struct perf_header *header, int fd,
1714 void *data __maybe_unused)
1716 struct perf_session *session;
1717 struct perf_evsel *evsel, *events = read_event_desc(header, fd);
1722 session = container_of(header, struct perf_session, header);
1723 for (evsel = events; evsel->attr.size; evsel++)
1724 perf_evlist__set_event_name(session->evlist, evsel);
1726 free_event_desc(events);
1731 static int process_cmdline(struct perf_file_section *section,
1732 struct perf_header *ph, int fd,
1733 void *data __maybe_unused)
1736 char *str, *cmdline = NULL, **argv = NULL;
1739 ret = readn(fd, &nr, sizeof(nr));
1740 if (ret != sizeof(nr))
1746 ph->env.nr_cmdline = nr;
1748 cmdline = zalloc(section->size + nr + 1);
1752 argv = zalloc(sizeof(char *) * (nr + 1));
1756 for (i = 0; i < nr; i++) {
1757 str = do_read_string(fd, ph);
1761 argv[i] = cmdline + len;
1762 memcpy(argv[i], str, strlen(str) + 1);
1763 len += strlen(str) + 1;
1766 ph->env.cmdline = cmdline;
1767 ph->env.cmdline_argv = (const char **) argv;
1776 static int process_cpu_topology(struct perf_file_section *section,
1777 struct perf_header *ph, int fd,
1778 void *data __maybe_unused)
1784 int cpu_nr = ph->env.nr_cpus_online;
1787 ph->env.cpu = calloc(cpu_nr, sizeof(*ph->env.cpu));
1791 ret = readn(fd, &nr, sizeof(nr));
1792 if (ret != sizeof(nr))
1798 ph->env.nr_sibling_cores = nr;
1799 size += sizeof(u32);
1800 if (strbuf_init(&sb, 128) < 0)
1803 for (i = 0; i < nr; i++) {
1804 str = do_read_string(fd, ph);
1808 /* include a NULL character at the end */
1809 if (strbuf_add(&sb, str, strlen(str) + 1) < 0)
1811 size += string_size(str);
1814 ph->env.sibling_cores = strbuf_detach(&sb, NULL);
1816 ret = readn(fd, &nr, sizeof(nr));
1817 if (ret != sizeof(nr))
1823 ph->env.nr_sibling_threads = nr;
1824 size += sizeof(u32);
1826 for (i = 0; i < nr; i++) {
1827 str = do_read_string(fd, ph);
1831 /* include a NULL character at the end */
1832 if (strbuf_add(&sb, str, strlen(str) + 1) < 0)
1834 size += string_size(str);
1837 ph->env.sibling_threads = strbuf_detach(&sb, NULL);
1840 * The header may be from old perf,
1841 * which doesn't include core id and socket id information.
1843 if (section->size <= size) {
1844 zfree(&ph->env.cpu);
1848 for (i = 0; i < (u32)cpu_nr; i++) {
1849 ret = readn(fd, &nr, sizeof(nr));
1850 if (ret != sizeof(nr))
1856 ph->env.cpu[i].core_id = nr;
1858 ret = readn(fd, &nr, sizeof(nr));
1859 if (ret != sizeof(nr))
1865 if (nr > (u32)cpu_nr) {
1866 pr_debug("socket_id number is too big."
1867 "You may need to upgrade the perf tool.\n");
1871 ph->env.cpu[i].socket_id = nr;
1877 strbuf_release(&sb);
1879 zfree(&ph->env.cpu);
1883 static int process_numa_topology(struct perf_file_section *section __maybe_unused,
1884 struct perf_header *ph, int fd,
1885 void *data __maybe_unused)
1887 struct numa_node *nodes, *n;
1893 ret = readn(fd, &nr, sizeof(nr));
1894 if (ret != sizeof(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.nr_numa_nodes = nr;
1937 ph->env.numa_nodes = nodes;
1945 static int process_pmu_mappings(struct perf_file_section *section __maybe_unused,
1946 struct perf_header *ph, int fd,
1947 void *data __maybe_unused)
1955 ret = readn(fd, &pmu_num, sizeof(pmu_num));
1956 if (ret != sizeof(pmu_num))
1960 pmu_num = bswap_32(pmu_num);
1963 pr_debug("pmu mappings not available\n");
1967 ph->env.nr_pmu_mappings = pmu_num;
1968 if (strbuf_init(&sb, 128) < 0)
1972 if (readn(fd, &type, sizeof(type)) != sizeof(type))
1975 type = bswap_32(type);
1977 name = do_read_string(fd, ph);
1981 if (strbuf_addf(&sb, "%u:%s", type, name) < 0)
1983 /* include a NULL character at the end */
1984 if (strbuf_add(&sb, "", 1) < 0)
1987 if (!strcmp(name, "msr"))
1988 ph->env.msr_pmu_type = type;
1993 ph->env.pmu_mappings = strbuf_detach(&sb, NULL);
1997 strbuf_release(&sb);
2001 static int process_group_desc(struct perf_file_section *section __maybe_unused,
2002 struct perf_header *ph, int fd,
2003 void *data __maybe_unused)
2006 u32 i, nr, nr_groups;
2007 struct perf_session *session;
2008 struct perf_evsel *evsel, *leader = NULL;
2015 if (readn(fd, &nr_groups, sizeof(nr_groups)) != sizeof(nr_groups))
2019 nr_groups = bswap_32(nr_groups);
2021 ph->env.nr_groups = nr_groups;
2023 pr_debug("group desc not available\n");
2027 desc = calloc(nr_groups, sizeof(*desc));
2031 for (i = 0; i < nr_groups; i++) {
2032 desc[i].name = do_read_string(fd, ph);
2036 if (readn(fd, &desc[i].leader_idx, sizeof(u32)) != sizeof(u32))
2039 if (readn(fd, &desc[i].nr_members, sizeof(u32)) != sizeof(u32))
2042 if (ph->needs_swap) {
2043 desc[i].leader_idx = bswap_32(desc[i].leader_idx);
2044 desc[i].nr_members = bswap_32(desc[i].nr_members);
2049 * Rebuild group relationship based on the group_desc
2051 session = container_of(ph, struct perf_session, header);
2052 session->evlist->nr_groups = nr_groups;
2055 evlist__for_each_entry(session->evlist, evsel) {
2056 if (evsel->idx == (int) desc[i].leader_idx) {
2057 evsel->leader = evsel;
2058 /* {anon_group} is a dummy name */
2059 if (strcmp(desc[i].name, "{anon_group}")) {
2060 evsel->group_name = desc[i].name;
2061 desc[i].name = NULL;
2063 evsel->nr_members = desc[i].nr_members;
2065 if (i >= nr_groups || nr > 0) {
2066 pr_debug("invalid group desc\n");
2071 nr = evsel->nr_members - 1;
2074 /* This is a group member */
2075 evsel->leader = leader;
2081 if (i != nr_groups || nr != 0) {
2082 pr_debug("invalid group desc\n");
2088 for (i = 0; i < nr_groups; i++)
2089 zfree(&desc[i].name);
2095 static int process_auxtrace(struct perf_file_section *section,
2096 struct perf_header *ph, int fd,
2097 void *data __maybe_unused)
2099 struct perf_session *session;
2102 session = container_of(ph, struct perf_session, header);
2104 err = auxtrace_index__process(fd, section->size, session,
2107 pr_err("Failed to process auxtrace index\n");
2111 static int process_cache(struct perf_file_section *section __maybe_unused,
2112 struct perf_header *ph __maybe_unused, int fd __maybe_unused,
2113 void *data __maybe_unused)
2115 struct cpu_cache_level *caches;
2116 u32 cnt, i, version;
2118 if (readn(fd, &version, sizeof(version)) != sizeof(version))
2122 version = bswap_32(version);
2127 if (readn(fd, &cnt, sizeof(cnt)) != sizeof(cnt))
2131 cnt = bswap_32(cnt);
2133 caches = zalloc(sizeof(*caches) * cnt);
2137 for (i = 0; i < cnt; i++) {
2138 struct cpu_cache_level c;
2141 if (readn(fd, &c.v, sizeof(u32)) != sizeof(u32))\
2142 goto out_free_caches; \
2143 if (ph->needs_swap) \
2144 c.v = bswap_32(c.v); \
2153 c.v = do_read_string(fd, ph); \
2155 goto out_free_caches;
2165 ph->env.caches = caches;
2166 ph->env.caches_cnt = cnt;
2173 struct feature_ops {
2174 int (*write)(int fd, struct perf_header *h, struct perf_evlist *evlist);
2175 void (*print)(struct perf_header *h, int fd, FILE *fp);
2176 int (*process)(struct perf_file_section *section,
2177 struct perf_header *h, int fd, void *data);
2182 #define FEAT_OPA(n, func) \
2183 [n] = { .name = #n, .write = write_##func, .print = print_##func }
2184 #define FEAT_OPP(n, func) \
2185 [n] = { .name = #n, .write = write_##func, .print = print_##func, \
2186 .process = process_##func }
2187 #define FEAT_OPF(n, func) \
2188 [n] = { .name = #n, .write = write_##func, .print = print_##func, \
2189 .process = process_##func, .full_only = true }
2191 /* feature_ops not implemented: */
2192 #define print_tracing_data NULL
2193 #define print_build_id NULL
2195 static const struct feature_ops feat_ops[HEADER_LAST_FEATURE] = {
2196 FEAT_OPP(HEADER_TRACING_DATA, tracing_data),
2197 FEAT_OPP(HEADER_BUILD_ID, build_id),
2198 FEAT_OPP(HEADER_HOSTNAME, hostname),
2199 FEAT_OPP(HEADER_OSRELEASE, osrelease),
2200 FEAT_OPP(HEADER_VERSION, version),
2201 FEAT_OPP(HEADER_ARCH, arch),
2202 FEAT_OPP(HEADER_NRCPUS, nrcpus),
2203 FEAT_OPP(HEADER_CPUDESC, cpudesc),
2204 FEAT_OPP(HEADER_CPUID, cpuid),
2205 FEAT_OPP(HEADER_TOTAL_MEM, total_mem),
2206 FEAT_OPP(HEADER_EVENT_DESC, event_desc),
2207 FEAT_OPP(HEADER_CMDLINE, cmdline),
2208 FEAT_OPF(HEADER_CPU_TOPOLOGY, cpu_topology),
2209 FEAT_OPF(HEADER_NUMA_TOPOLOGY, numa_topology),
2210 FEAT_OPA(HEADER_BRANCH_STACK, branch_stack),
2211 FEAT_OPP(HEADER_PMU_MAPPINGS, pmu_mappings),
2212 FEAT_OPP(HEADER_GROUP_DESC, group_desc),
2213 FEAT_OPP(HEADER_AUXTRACE, auxtrace),
2214 FEAT_OPA(HEADER_STAT, stat),
2215 FEAT_OPF(HEADER_CACHE, cache),
2218 struct header_print_data {
2220 bool full; /* extended list of headers */
2223 static int perf_file_section__fprintf_info(struct perf_file_section *section,
2224 struct perf_header *ph,
2225 int feat, int fd, void *data)
2227 struct header_print_data *hd = data;
2229 if (lseek(fd, section->offset, SEEK_SET) == (off_t)-1) {
2230 pr_debug("Failed to lseek to %" PRIu64 " offset for feature "
2231 "%d, continuing...\n", section->offset, feat);
2234 if (feat >= HEADER_LAST_FEATURE) {
2235 pr_warning("unknown feature %d\n", feat);
2238 if (!feat_ops[feat].print)
2241 if (!feat_ops[feat].full_only || hd->full)
2242 feat_ops[feat].print(ph, fd, hd->fp);
2244 fprintf(hd->fp, "# %s info available, use -I to display\n",
2245 feat_ops[feat].name);
2250 int perf_header__fprintf_info(struct perf_session *session, FILE *fp, bool full)
2252 struct header_print_data hd;
2253 struct perf_header *header = &session->header;
2254 int fd = perf_data_file__fd(session->file);
2261 ret = fstat(fd, &st);
2265 fprintf(fp, "# captured on: %s", ctime(&st.st_ctime));
2267 perf_header__process_sections(header, fd, &hd,
2268 perf_file_section__fprintf_info);
2270 fprintf(fp, "# missing features: ");
2271 for_each_clear_bit(bit, header->adds_features, HEADER_LAST_FEATURE) {
2273 fprintf(fp, "%s ", feat_ops[bit].name);
2280 static int do_write_feat(int fd, struct perf_header *h, int type,
2281 struct perf_file_section **p,
2282 struct perf_evlist *evlist)
2287 if (perf_header__has_feat(h, type)) {
2288 if (!feat_ops[type].write)
2291 (*p)->offset = lseek(fd, 0, SEEK_CUR);
2293 err = feat_ops[type].write(fd, h, evlist);
2295 pr_debug("failed to write feature %s\n", feat_ops[type].name);
2297 /* undo anything written */
2298 lseek(fd, (*p)->offset, SEEK_SET);
2302 (*p)->size = lseek(fd, 0, SEEK_CUR) - (*p)->offset;
2308 static int perf_header__adds_write(struct perf_header *header,
2309 struct perf_evlist *evlist, int fd)
2312 struct perf_file_section *feat_sec, *p;
2318 nr_sections = bitmap_weight(header->adds_features, HEADER_FEAT_BITS);
2322 feat_sec = p = calloc(nr_sections, sizeof(*feat_sec));
2323 if (feat_sec == NULL)
2326 sec_size = sizeof(*feat_sec) * nr_sections;
2328 sec_start = header->feat_offset;
2329 lseek(fd, sec_start + sec_size, SEEK_SET);
2331 for_each_set_bit(feat, header->adds_features, HEADER_FEAT_BITS) {
2332 if (do_write_feat(fd, header, feat, &p, evlist))
2333 perf_header__clear_feat(header, feat);
2336 lseek(fd, sec_start, SEEK_SET);
2338 * may write more than needed due to dropped feature, but
2339 * this is okay, reader will skip the mising entries
2341 err = do_write(fd, feat_sec, sec_size);
2343 pr_debug("failed to write feature section\n");
2348 int perf_header__write_pipe(int fd)
2350 struct perf_pipe_file_header f_header;
2353 f_header = (struct perf_pipe_file_header){
2354 .magic = PERF_MAGIC,
2355 .size = sizeof(f_header),
2358 err = do_write(fd, &f_header, sizeof(f_header));
2360 pr_debug("failed to write perf pipe header\n");
2367 int perf_session__write_header(struct perf_session *session,
2368 struct perf_evlist *evlist,
2369 int fd, bool at_exit)
2371 struct perf_file_header f_header;
2372 struct perf_file_attr f_attr;
2373 struct perf_header *header = &session->header;
2374 struct perf_evsel *evsel;
2378 lseek(fd, sizeof(f_header), SEEK_SET);
2380 evlist__for_each_entry(session->evlist, evsel) {
2381 evsel->id_offset = lseek(fd, 0, SEEK_CUR);
2382 err = do_write(fd, evsel->id, evsel->ids * sizeof(u64));
2384 pr_debug("failed to write perf header\n");
2389 attr_offset = lseek(fd, 0, SEEK_CUR);
2391 evlist__for_each_entry(evlist, evsel) {
2392 f_attr = (struct perf_file_attr){
2393 .attr = evsel->attr,
2395 .offset = evsel->id_offset,
2396 .size = evsel->ids * sizeof(u64),
2399 err = do_write(fd, &f_attr, sizeof(f_attr));
2401 pr_debug("failed to write perf header attribute\n");
2406 if (!header->data_offset)
2407 header->data_offset = lseek(fd, 0, SEEK_CUR);
2408 header->feat_offset = header->data_offset + header->data_size;
2411 err = perf_header__adds_write(header, evlist, fd);
2416 f_header = (struct perf_file_header){
2417 .magic = PERF_MAGIC,
2418 .size = sizeof(f_header),
2419 .attr_size = sizeof(f_attr),
2421 .offset = attr_offset,
2422 .size = evlist->nr_entries * sizeof(f_attr),
2425 .offset = header->data_offset,
2426 .size = header->data_size,
2428 /* event_types is ignored, store zeros */
2431 memcpy(&f_header.adds_features, &header->adds_features, sizeof(header->adds_features));
2433 lseek(fd, 0, SEEK_SET);
2434 err = do_write(fd, &f_header, sizeof(f_header));
2436 pr_debug("failed to write perf header\n");
2439 lseek(fd, header->data_offset + header->data_size, SEEK_SET);
2444 static int perf_header__getbuffer64(struct perf_header *header,
2445 int fd, void *buf, size_t size)
2447 if (readn(fd, buf, size) <= 0)
2450 if (header->needs_swap)
2451 mem_bswap_64(buf, size);
2456 int perf_header__process_sections(struct perf_header *header, int fd,
2458 int (*process)(struct perf_file_section *section,
2459 struct perf_header *ph,
2460 int feat, int fd, void *data))
2462 struct perf_file_section *feat_sec, *sec;
2468 nr_sections = bitmap_weight(header->adds_features, HEADER_FEAT_BITS);
2472 feat_sec = sec = calloc(nr_sections, sizeof(*feat_sec));
2476 sec_size = sizeof(*feat_sec) * nr_sections;
2478 lseek(fd, header->feat_offset, SEEK_SET);
2480 err = perf_header__getbuffer64(header, fd, feat_sec, sec_size);
2484 for_each_set_bit(feat, header->adds_features, HEADER_LAST_FEATURE) {
2485 err = process(sec++, header, feat, fd, data);
2495 static const int attr_file_abi_sizes[] = {
2496 [0] = PERF_ATTR_SIZE_VER0,
2497 [1] = PERF_ATTR_SIZE_VER1,
2498 [2] = PERF_ATTR_SIZE_VER2,
2499 [3] = PERF_ATTR_SIZE_VER3,
2500 [4] = PERF_ATTR_SIZE_VER4,
2505 * In the legacy file format, the magic number is not used to encode endianness.
2506 * hdr_sz was used to encode endianness. But given that hdr_sz can vary based
2507 * on ABI revisions, we need to try all combinations for all endianness to
2508 * detect the endianness.
2510 static int try_all_file_abis(uint64_t hdr_sz, struct perf_header *ph)
2512 uint64_t ref_size, attr_size;
2515 for (i = 0 ; attr_file_abi_sizes[i]; i++) {
2516 ref_size = attr_file_abi_sizes[i]
2517 + sizeof(struct perf_file_section);
2518 if (hdr_sz != ref_size) {
2519 attr_size = bswap_64(hdr_sz);
2520 if (attr_size != ref_size)
2523 ph->needs_swap = true;
2525 pr_debug("ABI%d perf.data file detected, need_swap=%d\n",
2530 /* could not determine endianness */
2534 #define PERF_PIPE_HDR_VER0 16
2536 static const size_t attr_pipe_abi_sizes[] = {
2537 [0] = PERF_PIPE_HDR_VER0,
2542 * In the legacy pipe format, there is an implicit assumption that endiannesss
2543 * between host recording the samples, and host parsing the samples is the
2544 * same. This is not always the case given that the pipe output may always be
2545 * redirected into a file and analyzed on a different machine with possibly a
2546 * different endianness and perf_event ABI revsions in the perf tool itself.
2548 static int try_all_pipe_abis(uint64_t hdr_sz, struct perf_header *ph)
2553 for (i = 0 ; attr_pipe_abi_sizes[i]; i++) {
2554 if (hdr_sz != attr_pipe_abi_sizes[i]) {
2555 attr_size = bswap_64(hdr_sz);
2556 if (attr_size != hdr_sz)
2559 ph->needs_swap = true;
2561 pr_debug("Pipe ABI%d perf.data file detected\n", i);
2567 bool is_perf_magic(u64 magic)
2569 if (!memcmp(&magic, __perf_magic1, sizeof(magic))
2570 || magic == __perf_magic2
2571 || magic == __perf_magic2_sw)
2577 static int check_magic_endian(u64 magic, uint64_t hdr_sz,
2578 bool is_pipe, struct perf_header *ph)
2582 /* check for legacy format */
2583 ret = memcmp(&magic, __perf_magic1, sizeof(magic));
2585 ph->version = PERF_HEADER_VERSION_1;
2586 pr_debug("legacy perf.data format\n");
2588 return try_all_pipe_abis(hdr_sz, ph);
2590 return try_all_file_abis(hdr_sz, ph);
2593 * the new magic number serves two purposes:
2594 * - unique number to identify actual perf.data files
2595 * - encode endianness of file
2597 ph->version = PERF_HEADER_VERSION_2;
2599 /* check magic number with one endianness */
2600 if (magic == __perf_magic2)
2603 /* check magic number with opposite endianness */
2604 if (magic != __perf_magic2_sw)
2607 ph->needs_swap = true;
2612 int perf_file_header__read(struct perf_file_header *header,
2613 struct perf_header *ph, int fd)
2617 lseek(fd, 0, SEEK_SET);
2619 ret = readn(fd, header, sizeof(*header));
2623 if (check_magic_endian(header->magic,
2624 header->attr_size, false, ph) < 0) {
2625 pr_debug("magic/endian check failed\n");
2629 if (ph->needs_swap) {
2630 mem_bswap_64(header, offsetof(struct perf_file_header,
2634 if (header->size != sizeof(*header)) {
2635 /* Support the previous format */
2636 if (header->size == offsetof(typeof(*header), adds_features))
2637 bitmap_zero(header->adds_features, HEADER_FEAT_BITS);
2640 } else if (ph->needs_swap) {
2642 * feature bitmap is declared as an array of unsigned longs --
2643 * not good since its size can differ between the host that
2644 * generated the data file and the host analyzing the file.
2646 * We need to handle endianness, but we don't know the size of
2647 * the unsigned long where the file was generated. Take a best
2648 * guess at determining it: try 64-bit swap first (ie., file
2649 * created on a 64-bit host), and check if the hostname feature
2650 * bit is set (this feature bit is forced on as of fbe96f2).
2651 * If the bit is not, undo the 64-bit swap and try a 32-bit
2652 * swap. If the hostname bit is still not set (e.g., older data
2653 * file), punt and fallback to the original behavior --
2654 * clearing all feature bits and setting buildid.
2656 mem_bswap_64(&header->adds_features,
2657 BITS_TO_U64(HEADER_FEAT_BITS));
2659 if (!test_bit(HEADER_HOSTNAME, header->adds_features)) {
2661 mem_bswap_64(&header->adds_features,
2662 BITS_TO_U64(HEADER_FEAT_BITS));
2665 mem_bswap_32(&header->adds_features,
2666 BITS_TO_U32(HEADER_FEAT_BITS));
2669 if (!test_bit(HEADER_HOSTNAME, header->adds_features)) {
2670 bitmap_zero(header->adds_features, HEADER_FEAT_BITS);
2671 set_bit(HEADER_BUILD_ID, header->adds_features);
2675 memcpy(&ph->adds_features, &header->adds_features,
2676 sizeof(ph->adds_features));
2678 ph->data_offset = header->data.offset;
2679 ph->data_size = header->data.size;
2680 ph->feat_offset = header->data.offset + header->data.size;
2684 static int perf_file_section__process(struct perf_file_section *section,
2685 struct perf_header *ph,
2686 int feat, int fd, void *data)
2688 if (lseek(fd, section->offset, SEEK_SET) == (off_t)-1) {
2689 pr_debug("Failed to lseek to %" PRIu64 " offset for feature "
2690 "%d, continuing...\n", section->offset, feat);
2694 if (feat >= HEADER_LAST_FEATURE) {
2695 pr_debug("unknown feature %d, continuing...\n", feat);
2699 if (!feat_ops[feat].process)
2702 return feat_ops[feat].process(section, ph, fd, data);
2705 static int perf_file_header__read_pipe(struct perf_pipe_file_header *header,
2706 struct perf_header *ph, int fd,
2711 ret = readn(fd, header, sizeof(*header));
2715 if (check_magic_endian(header->magic, header->size, true, ph) < 0) {
2716 pr_debug("endian/magic failed\n");
2721 header->size = bswap_64(header->size);
2723 if (repipe && do_write(STDOUT_FILENO, header, sizeof(*header)) < 0)
2729 static int perf_header__read_pipe(struct perf_session *session)
2731 struct perf_header *header = &session->header;
2732 struct perf_pipe_file_header f_header;
2734 if (perf_file_header__read_pipe(&f_header, header,
2735 perf_data_file__fd(session->file),
2736 session->repipe) < 0) {
2737 pr_debug("incompatible file format\n");
2744 static int read_attr(int fd, struct perf_header *ph,
2745 struct perf_file_attr *f_attr)
2747 struct perf_event_attr *attr = &f_attr->attr;
2749 size_t our_sz = sizeof(f_attr->attr);
2752 memset(f_attr, 0, sizeof(*f_attr));
2754 /* read minimal guaranteed structure */
2755 ret = readn(fd, attr, PERF_ATTR_SIZE_VER0);
2757 pr_debug("cannot read %d bytes of header attr\n",
2758 PERF_ATTR_SIZE_VER0);
2762 /* on file perf_event_attr size */
2770 sz = PERF_ATTR_SIZE_VER0;
2771 } else if (sz > our_sz) {
2772 pr_debug("file uses a more recent and unsupported ABI"
2773 " (%zu bytes extra)\n", sz - our_sz);
2776 /* what we have not yet read and that we know about */
2777 left = sz - PERF_ATTR_SIZE_VER0;
2780 ptr += PERF_ATTR_SIZE_VER0;
2782 ret = readn(fd, ptr, left);
2784 /* read perf_file_section, ids are read in caller */
2785 ret = readn(fd, &f_attr->ids, sizeof(f_attr->ids));
2787 return ret <= 0 ? -1 : 0;
2790 static int perf_evsel__prepare_tracepoint_event(struct perf_evsel *evsel,
2791 struct pevent *pevent)
2793 struct event_format *event;
2796 /* already prepared */
2797 if (evsel->tp_format)
2800 if (pevent == NULL) {
2801 pr_debug("broken or missing trace data\n");
2805 event = pevent_find_event(pevent, evsel->attr.config);
2806 if (event == NULL) {
2807 pr_debug("cannot find event format for %d\n", (int)evsel->attr.config);
2812 snprintf(bf, sizeof(bf), "%s:%s", event->system, event->name);
2813 evsel->name = strdup(bf);
2814 if (evsel->name == NULL)
2818 evsel->tp_format = event;
2822 static int perf_evlist__prepare_tracepoint_events(struct perf_evlist *evlist,
2823 struct pevent *pevent)
2825 struct perf_evsel *pos;
2827 evlist__for_each_entry(evlist, pos) {
2828 if (pos->attr.type == PERF_TYPE_TRACEPOINT &&
2829 perf_evsel__prepare_tracepoint_event(pos, pevent))
2836 int perf_session__read_header(struct perf_session *session)
2838 struct perf_data_file *file = session->file;
2839 struct perf_header *header = &session->header;
2840 struct perf_file_header f_header;
2841 struct perf_file_attr f_attr;
2843 int nr_attrs, nr_ids, i, j;
2844 int fd = perf_data_file__fd(file);
2846 session->evlist = perf_evlist__new();
2847 if (session->evlist == NULL)
2850 session->evlist->env = &header->env;
2851 session->machines.host.env = &header->env;
2852 if (perf_data_file__is_pipe(file))
2853 return perf_header__read_pipe(session);
2855 if (perf_file_header__read(&f_header, header, fd) < 0)
2859 * Sanity check that perf.data was written cleanly; data size is
2860 * initialized to 0 and updated only if the on_exit function is run.
2861 * If data size is still 0 then the file contains only partial
2862 * information. Just warn user and process it as much as it can.
2864 if (f_header.data.size == 0) {
2865 pr_warning("WARNING: The %s file's data size field is 0 which is unexpected.\n"
2866 "Was the 'perf record' command properly terminated?\n",
2870 nr_attrs = f_header.attrs.size / f_header.attr_size;
2871 lseek(fd, f_header.attrs.offset, SEEK_SET);
2873 for (i = 0; i < nr_attrs; i++) {
2874 struct perf_evsel *evsel;
2877 if (read_attr(fd, header, &f_attr) < 0)
2880 if (header->needs_swap) {
2881 f_attr.ids.size = bswap_64(f_attr.ids.size);
2882 f_attr.ids.offset = bswap_64(f_attr.ids.offset);
2883 perf_event__attr_swap(&f_attr.attr);
2886 tmp = lseek(fd, 0, SEEK_CUR);
2887 evsel = perf_evsel__new(&f_attr.attr);
2890 goto out_delete_evlist;
2892 evsel->needs_swap = header->needs_swap;
2894 * Do it before so that if perf_evsel__alloc_id fails, this
2895 * entry gets purged too at perf_evlist__delete().
2897 perf_evlist__add(session->evlist, evsel);
2899 nr_ids = f_attr.ids.size / sizeof(u64);
2901 * We don't have the cpu and thread maps on the header, so
2902 * for allocating the perf_sample_id table we fake 1 cpu and
2903 * hattr->ids threads.
2905 if (perf_evsel__alloc_id(evsel, 1, nr_ids))
2906 goto out_delete_evlist;
2908 lseek(fd, f_attr.ids.offset, SEEK_SET);
2910 for (j = 0; j < nr_ids; j++) {
2911 if (perf_header__getbuffer64(header, fd, &f_id, sizeof(f_id)))
2914 perf_evlist__id_add(session->evlist, evsel, 0, j, f_id);
2917 lseek(fd, tmp, SEEK_SET);
2920 symbol_conf.nr_events = nr_attrs;
2922 perf_header__process_sections(header, fd, &session->tevent,
2923 perf_file_section__process);
2925 if (perf_evlist__prepare_tracepoint_events(session->evlist,
2926 session->tevent.pevent))
2927 goto out_delete_evlist;
2934 perf_evlist__delete(session->evlist);
2935 session->evlist = NULL;
2939 int perf_event__synthesize_attr(struct perf_tool *tool,
2940 struct perf_event_attr *attr, u32 ids, u64 *id,
2941 perf_event__handler_t process)
2943 union perf_event *ev;
2947 size = sizeof(struct perf_event_attr);
2948 size = PERF_ALIGN(size, sizeof(u64));
2949 size += sizeof(struct perf_event_header);
2950 size += ids * sizeof(u64);
2957 ev->attr.attr = *attr;
2958 memcpy(ev->attr.id, id, ids * sizeof(u64));
2960 ev->attr.header.type = PERF_RECORD_HEADER_ATTR;
2961 ev->attr.header.size = (u16)size;
2963 if (ev->attr.header.size == size)
2964 err = process(tool, ev, NULL, NULL);
2973 static struct event_update_event *
2974 event_update_event__new(size_t size, u64 type, u64 id)
2976 struct event_update_event *ev;
2978 size += sizeof(*ev);
2979 size = PERF_ALIGN(size, sizeof(u64));
2983 ev->header.type = PERF_RECORD_EVENT_UPDATE;
2984 ev->header.size = (u16)size;
2992 perf_event__synthesize_event_update_unit(struct perf_tool *tool,
2993 struct perf_evsel *evsel,
2994 perf_event__handler_t process)
2996 struct event_update_event *ev;
2997 size_t size = strlen(evsel->unit);
3000 ev = event_update_event__new(size + 1, PERF_EVENT_UPDATE__UNIT, evsel->id[0]);
3004 strncpy(ev->data, evsel->unit, size);
3005 err = process(tool, (union perf_event *)ev, NULL, NULL);
3011 perf_event__synthesize_event_update_scale(struct perf_tool *tool,
3012 struct perf_evsel *evsel,
3013 perf_event__handler_t process)
3015 struct event_update_event *ev;
3016 struct event_update_event_scale *ev_data;
3019 ev = event_update_event__new(sizeof(*ev_data), PERF_EVENT_UPDATE__SCALE, evsel->id[0]);
3023 ev_data = (struct event_update_event_scale *) ev->data;
3024 ev_data->scale = evsel->scale;
3025 err = process(tool, (union perf_event*) ev, NULL, NULL);
3031 perf_event__synthesize_event_update_name(struct perf_tool *tool,
3032 struct perf_evsel *evsel,
3033 perf_event__handler_t process)
3035 struct event_update_event *ev;
3036 size_t len = strlen(evsel->name);
3039 ev = event_update_event__new(len + 1, PERF_EVENT_UPDATE__NAME, evsel->id[0]);
3043 strncpy(ev->data, evsel->name, len);
3044 err = process(tool, (union perf_event*) ev, NULL, NULL);
3050 perf_event__synthesize_event_update_cpus(struct perf_tool *tool,
3051 struct perf_evsel *evsel,
3052 perf_event__handler_t process)
3054 size_t size = sizeof(struct event_update_event);
3055 struct event_update_event *ev;
3059 if (!evsel->own_cpus)
3062 ev = cpu_map_data__alloc(evsel->own_cpus, &size, &type, &max);
3066 ev->header.type = PERF_RECORD_EVENT_UPDATE;
3067 ev->header.size = (u16)size;
3068 ev->type = PERF_EVENT_UPDATE__CPUS;
3069 ev->id = evsel->id[0];
3071 cpu_map_data__synthesize((struct cpu_map_data *) ev->data,
3075 err = process(tool, (union perf_event*) ev, NULL, NULL);
3080 size_t perf_event__fprintf_event_update(union perf_event *event, FILE *fp)
3082 struct event_update_event *ev = &event->event_update;
3083 struct event_update_event_scale *ev_scale;
3084 struct event_update_event_cpus *ev_cpus;
3085 struct cpu_map *map;
3088 ret = fprintf(fp, "\n... id: %" PRIu64 "\n", ev->id);
3091 case PERF_EVENT_UPDATE__SCALE:
3092 ev_scale = (struct event_update_event_scale *) ev->data;
3093 ret += fprintf(fp, "... scale: %f\n", ev_scale->scale);
3095 case PERF_EVENT_UPDATE__UNIT:
3096 ret += fprintf(fp, "... unit: %s\n", ev->data);
3098 case PERF_EVENT_UPDATE__NAME:
3099 ret += fprintf(fp, "... name: %s\n", ev->data);
3101 case PERF_EVENT_UPDATE__CPUS:
3102 ev_cpus = (struct event_update_event_cpus *) ev->data;
3103 ret += fprintf(fp, "... ");
3105 map = cpu_map__new_data(&ev_cpus->cpus);
3107 ret += cpu_map__fprintf(map, fp);
3109 ret += fprintf(fp, "failed to get cpus\n");
3112 ret += fprintf(fp, "... unknown type\n");
3119 int perf_event__synthesize_attrs(struct perf_tool *tool,
3120 struct perf_session *session,
3121 perf_event__handler_t process)
3123 struct perf_evsel *evsel;
3126 evlist__for_each_entry(session->evlist, evsel) {
3127 err = perf_event__synthesize_attr(tool, &evsel->attr, evsel->ids,
3128 evsel->id, process);
3130 pr_debug("failed to create perf header attribute\n");
3138 int perf_event__process_attr(struct perf_tool *tool __maybe_unused,
3139 union perf_event *event,
3140 struct perf_evlist **pevlist)
3143 struct perf_evsel *evsel;
3144 struct perf_evlist *evlist = *pevlist;
3146 if (evlist == NULL) {
3147 *pevlist = evlist = perf_evlist__new();
3152 evsel = perf_evsel__new(&event->attr.attr);
3156 perf_evlist__add(evlist, evsel);
3158 ids = event->header.size;
3159 ids -= (void *)&event->attr.id - (void *)event;
3160 n_ids = ids / sizeof(u64);
3162 * We don't have the cpu and thread maps on the header, so
3163 * for allocating the perf_sample_id table we fake 1 cpu and
3164 * hattr->ids threads.
3166 if (perf_evsel__alloc_id(evsel, 1, n_ids))
3169 for (i = 0; i < n_ids; i++) {
3170 perf_evlist__id_add(evlist, evsel, 0, i, event->attr.id[i]);
3173 symbol_conf.nr_events = evlist->nr_entries;
3178 int perf_event__process_event_update(struct perf_tool *tool __maybe_unused,
3179 union perf_event *event,
3180 struct perf_evlist **pevlist)
3182 struct event_update_event *ev = &event->event_update;
3183 struct event_update_event_scale *ev_scale;
3184 struct event_update_event_cpus *ev_cpus;
3185 struct perf_evlist *evlist;
3186 struct perf_evsel *evsel;
3187 struct cpu_map *map;
3189 if (!pevlist || *pevlist == NULL)
3194 evsel = perf_evlist__id2evsel(evlist, ev->id);
3199 case PERF_EVENT_UPDATE__UNIT:
3200 evsel->unit = strdup(ev->data);
3202 case PERF_EVENT_UPDATE__NAME:
3203 evsel->name = strdup(ev->data);
3205 case PERF_EVENT_UPDATE__SCALE:
3206 ev_scale = (struct event_update_event_scale *) ev->data;
3207 evsel->scale = ev_scale->scale;
3209 case PERF_EVENT_UPDATE__CPUS:
3210 ev_cpus = (struct event_update_event_cpus *) ev->data;
3212 map = cpu_map__new_data(&ev_cpus->cpus);
3214 evsel->own_cpus = map;
3216 pr_err("failed to get event_update cpus\n");
3224 int perf_event__synthesize_tracing_data(struct perf_tool *tool, int fd,
3225 struct perf_evlist *evlist,
3226 perf_event__handler_t process)
3228 union perf_event ev;
3229 struct tracing_data *tdata;
3230 ssize_t size = 0, aligned_size = 0, padding;
3231 int err __maybe_unused = 0;
3234 * We are going to store the size of the data followed
3235 * by the data contents. Since the fd descriptor is a pipe,
3236 * we cannot seek back to store the size of the data once
3237 * we know it. Instead we:
3239 * - write the tracing data to the temp file
3240 * - get/write the data size to pipe
3241 * - write the tracing data from the temp file
3244 tdata = tracing_data_get(&evlist->entries, fd, true);
3248 memset(&ev, 0, sizeof(ev));
3250 ev.tracing_data.header.type = PERF_RECORD_HEADER_TRACING_DATA;
3252 aligned_size = PERF_ALIGN(size, sizeof(u64));
3253 padding = aligned_size - size;
3254 ev.tracing_data.header.size = sizeof(ev.tracing_data);
3255 ev.tracing_data.size = aligned_size;
3257 process(tool, &ev, NULL, NULL);
3260 * The put function will copy all the tracing data
3261 * stored in temp file to the pipe.
3263 tracing_data_put(tdata);
3265 write_padded(fd, NULL, 0, padding);
3267 return aligned_size;
3270 int perf_event__process_tracing_data(struct perf_tool *tool __maybe_unused,
3271 union perf_event *event,
3272 struct perf_session *session)
3274 ssize_t size_read, padding, size = event->tracing_data.size;
3275 int fd = perf_data_file__fd(session->file);
3276 off_t offset = lseek(fd, 0, SEEK_CUR);
3279 /* setup for reading amidst mmap */
3280 lseek(fd, offset + sizeof(struct tracing_data_event),
3283 size_read = trace_report(fd, &session->tevent,
3285 padding = PERF_ALIGN(size_read, sizeof(u64)) - size_read;
3287 if (readn(fd, buf, padding) < 0) {
3288 pr_err("%s: reading input file", __func__);
3291 if (session->repipe) {
3292 int retw = write(STDOUT_FILENO, buf, padding);
3293 if (retw <= 0 || retw != padding) {
3294 pr_err("%s: repiping tracing data padding", __func__);
3299 if (size_read + padding != size) {
3300 pr_err("%s: tracing data size mismatch", __func__);
3304 perf_evlist__prepare_tracepoint_events(session->evlist,
3305 session->tevent.pevent);
3307 return size_read + padding;
3310 int perf_event__synthesize_build_id(struct perf_tool *tool,
3311 struct dso *pos, u16 misc,
3312 perf_event__handler_t process,
3313 struct machine *machine)
3315 union perf_event ev;
3322 memset(&ev, 0, sizeof(ev));
3324 len = pos->long_name_len + 1;
3325 len = PERF_ALIGN(len, NAME_ALIGN);
3326 memcpy(&ev.build_id.build_id, pos->build_id, sizeof(pos->build_id));
3327 ev.build_id.header.type = PERF_RECORD_HEADER_BUILD_ID;
3328 ev.build_id.header.misc = misc;
3329 ev.build_id.pid = machine->pid;
3330 ev.build_id.header.size = sizeof(ev.build_id) + len;
3331 memcpy(&ev.build_id.filename, pos->long_name, pos->long_name_len);
3333 err = process(tool, &ev, NULL, machine);
3338 int perf_event__process_build_id(struct perf_tool *tool __maybe_unused,
3339 union perf_event *event,
3340 struct perf_session *session)
3342 __event_process_build_id(&event->build_id,
3343 event->build_id.filename,