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/$(SRCARCH)/util/header.c
831 int __weak get_cpuid(char *buffer __maybe_unused, size_t sz __maybe_unused)
836 static int write_cpuid(int fd, struct perf_header *h __maybe_unused,
837 struct perf_evlist *evlist __maybe_unused)
842 ret = get_cpuid(buffer, sizeof(buffer));
848 return do_write_string(fd, buffer);
851 static int write_branch_stack(int fd __maybe_unused,
852 struct perf_header *h __maybe_unused,
853 struct perf_evlist *evlist __maybe_unused)
858 static int write_auxtrace(int fd, struct perf_header *h,
859 struct perf_evlist *evlist __maybe_unused)
861 struct perf_session *session;
864 session = container_of(h, struct perf_session, header);
866 err = auxtrace_index__write(fd, &session->auxtrace_index);
868 pr_err("Failed to write auxtrace index\n");
872 static int cpu_cache_level__sort(const void *a, const void *b)
874 struct cpu_cache_level *cache_a = (struct cpu_cache_level *)a;
875 struct cpu_cache_level *cache_b = (struct cpu_cache_level *)b;
877 return cache_a->level - cache_b->level;
880 static bool cpu_cache_level__cmp(struct cpu_cache_level *a, struct cpu_cache_level *b)
882 if (a->level != b->level)
885 if (a->line_size != b->line_size)
888 if (a->sets != b->sets)
891 if (a->ways != b->ways)
894 if (strcmp(a->type, b->type))
897 if (strcmp(a->size, b->size))
900 if (strcmp(a->map, b->map))
906 static int cpu_cache_level__read(struct cpu_cache_level *cache, u32 cpu, u16 level)
908 char path[PATH_MAX], file[PATH_MAX];
912 scnprintf(path, PATH_MAX, "devices/system/cpu/cpu%d/cache/index%d/", cpu, level);
913 scnprintf(file, PATH_MAX, "%s/%s", sysfs__mountpoint(), path);
918 scnprintf(file, PATH_MAX, "%s/level", path);
919 if (sysfs__read_int(file, (int *) &cache->level))
922 scnprintf(file, PATH_MAX, "%s/coherency_line_size", path);
923 if (sysfs__read_int(file, (int *) &cache->line_size))
926 scnprintf(file, PATH_MAX, "%s/number_of_sets", path);
927 if (sysfs__read_int(file, (int *) &cache->sets))
930 scnprintf(file, PATH_MAX, "%s/ways_of_associativity", path);
931 if (sysfs__read_int(file, (int *) &cache->ways))
934 scnprintf(file, PATH_MAX, "%s/type", path);
935 if (sysfs__read_str(file, &cache->type, &len))
938 cache->type[len] = 0;
939 cache->type = rtrim(cache->type);
941 scnprintf(file, PATH_MAX, "%s/size", path);
942 if (sysfs__read_str(file, &cache->size, &len)) {
947 cache->size[len] = 0;
948 cache->size = rtrim(cache->size);
950 scnprintf(file, PATH_MAX, "%s/shared_cpu_list", path);
951 if (sysfs__read_str(file, &cache->map, &len)) {
958 cache->map = rtrim(cache->map);
962 static void cpu_cache_level__fprintf(FILE *out, struct cpu_cache_level *c)
964 fprintf(out, "L%d %-15s %8s [%s]\n", c->level, c->type, c->size, c->map);
967 static int build_caches(struct cpu_cache_level caches[], u32 size, u32 *cntp)
974 ncpus = sysconf(_SC_NPROCESSORS_CONF);
978 nr = (u32)(ncpus & UINT_MAX);
980 for (cpu = 0; cpu < nr; cpu++) {
981 for (level = 0; level < 10; level++) {
982 struct cpu_cache_level c;
985 err = cpu_cache_level__read(&c, cpu, level);
992 for (i = 0; i < cnt; i++) {
993 if (cpu_cache_level__cmp(&c, &caches[i]))
1000 cpu_cache_level__free(&c);
1002 if (WARN_ONCE(cnt == size, "way too many cpu caches.."))
1011 #define MAX_CACHES (MAX_NR_CPUS * 4)
1013 static int write_cache(int fd, struct perf_header *h __maybe_unused,
1014 struct perf_evlist *evlist __maybe_unused)
1016 struct cpu_cache_level caches[MAX_CACHES];
1017 u32 cnt = 0, i, version = 1;
1020 ret = build_caches(caches, MAX_CACHES, &cnt);
1024 qsort(&caches, cnt, sizeof(struct cpu_cache_level), cpu_cache_level__sort);
1026 ret = do_write(fd, &version, sizeof(u32));
1030 ret = do_write(fd, &cnt, sizeof(u32));
1034 for (i = 0; i < cnt; i++) {
1035 struct cpu_cache_level *c = &caches[i];
1038 ret = do_write(fd, &c->v, sizeof(u32)); \
1049 ret = do_write_string(fd, (const char *) c->v); \
1060 for (i = 0; i < cnt; i++)
1061 cpu_cache_level__free(&caches[i]);
1065 static int write_stat(int fd __maybe_unused,
1066 struct perf_header *h __maybe_unused,
1067 struct perf_evlist *evlist __maybe_unused)
1072 static void print_hostname(struct perf_header *ph, int fd __maybe_unused,
1075 fprintf(fp, "# hostname : %s\n", ph->env.hostname);
1078 static void print_osrelease(struct perf_header *ph, int fd __maybe_unused,
1081 fprintf(fp, "# os release : %s\n", ph->env.os_release);
1084 static void print_arch(struct perf_header *ph, int fd __maybe_unused, FILE *fp)
1086 fprintf(fp, "# arch : %s\n", ph->env.arch);
1089 static void print_cpudesc(struct perf_header *ph, int fd __maybe_unused,
1092 fprintf(fp, "# cpudesc : %s\n", ph->env.cpu_desc);
1095 static void print_nrcpus(struct perf_header *ph, int fd __maybe_unused,
1098 fprintf(fp, "# nrcpus online : %u\n", ph->env.nr_cpus_online);
1099 fprintf(fp, "# nrcpus avail : %u\n", ph->env.nr_cpus_avail);
1102 static void print_version(struct perf_header *ph, int fd __maybe_unused,
1105 fprintf(fp, "# perf version : %s\n", ph->env.version);
1108 static void print_cmdline(struct perf_header *ph, int fd __maybe_unused,
1113 nr = ph->env.nr_cmdline;
1115 fprintf(fp, "# cmdline : ");
1117 for (i = 0; i < nr; i++)
1118 fprintf(fp, "%s ", ph->env.cmdline_argv[i]);
1122 static void print_cpu_topology(struct perf_header *ph, int fd __maybe_unused,
1127 int cpu_nr = ph->env.nr_cpus_online;
1129 nr = ph->env.nr_sibling_cores;
1130 str = ph->env.sibling_cores;
1132 for (i = 0; i < nr; i++) {
1133 fprintf(fp, "# sibling cores : %s\n", str);
1134 str += strlen(str) + 1;
1137 nr = ph->env.nr_sibling_threads;
1138 str = ph->env.sibling_threads;
1140 for (i = 0; i < nr; i++) {
1141 fprintf(fp, "# sibling threads : %s\n", str);
1142 str += strlen(str) + 1;
1145 if (ph->env.cpu != NULL) {
1146 for (i = 0; i < cpu_nr; i++)
1147 fprintf(fp, "# CPU %d: Core ID %d, Socket ID %d\n", i,
1148 ph->env.cpu[i].core_id, ph->env.cpu[i].socket_id);
1150 fprintf(fp, "# Core ID and Socket ID information is not available\n");
1153 static void free_event_desc(struct perf_evsel *events)
1155 struct perf_evsel *evsel;
1160 for (evsel = events; evsel->attr.size; evsel++) {
1161 zfree(&evsel->name);
1168 static struct perf_evsel *
1169 read_event_desc(struct perf_header *ph, int fd)
1171 struct perf_evsel *evsel, *events = NULL;
1174 u32 nre, sz, nr, i, j;
1178 /* number of events */
1179 ret = readn(fd, &nre, sizeof(nre));
1180 if (ret != (ssize_t)sizeof(nre))
1184 nre = bswap_32(nre);
1186 ret = readn(fd, &sz, sizeof(sz));
1187 if (ret != (ssize_t)sizeof(sz))
1193 /* buffer to hold on file attr struct */
1198 /* the last event terminates with evsel->attr.size == 0: */
1199 events = calloc(nre + 1, sizeof(*events));
1203 msz = sizeof(evsel->attr);
1207 for (i = 0, evsel = events; i < nre; evsel++, i++) {
1211 * must read entire on-file attr struct to
1212 * sync up with layout.
1214 ret = readn(fd, buf, sz);
1215 if (ret != (ssize_t)sz)
1219 perf_event__attr_swap(buf);
1221 memcpy(&evsel->attr, buf, msz);
1223 ret = readn(fd, &nr, sizeof(nr));
1224 if (ret != (ssize_t)sizeof(nr))
1227 if (ph->needs_swap) {
1229 evsel->needs_swap = true;
1232 evsel->name = do_read_string(fd, ph);
1237 id = calloc(nr, sizeof(*id));
1243 for (j = 0 ; j < nr; j++) {
1244 ret = readn(fd, id, sizeof(*id));
1245 if (ret != (ssize_t)sizeof(*id))
1248 *id = bswap_64(*id);
1256 free_event_desc(events);
1261 static int __desc_attr__fprintf(FILE *fp, const char *name, const char *val,
1262 void *priv __attribute__((unused)))
1264 return fprintf(fp, ", %s = %s", name, val);
1267 static void print_event_desc(struct perf_header *ph, int fd, FILE *fp)
1269 struct perf_evsel *evsel, *events = read_event_desc(ph, fd);
1274 fprintf(fp, "# event desc: not available or unable to read\n");
1278 for (evsel = events; evsel->attr.size; evsel++) {
1279 fprintf(fp, "# event : name = %s, ", evsel->name);
1282 fprintf(fp, ", id = {");
1283 for (j = 0, id = evsel->id; j < evsel->ids; j++, id++) {
1286 fprintf(fp, " %"PRIu64, *id);
1291 perf_event_attr__fprintf(fp, &evsel->attr, __desc_attr__fprintf, NULL);
1296 free_event_desc(events);
1299 static void print_total_mem(struct perf_header *ph, int fd __maybe_unused,
1302 fprintf(fp, "# total memory : %Lu kB\n", ph->env.total_mem);
1305 static void print_numa_topology(struct perf_header *ph, int fd __maybe_unused,
1309 struct numa_node *n;
1311 for (i = 0; i < ph->env.nr_numa_nodes; i++) {
1312 n = &ph->env.numa_nodes[i];
1314 fprintf(fp, "# node%u meminfo : total = %"PRIu64" kB,"
1315 " free = %"PRIu64" kB\n",
1316 n->node, n->mem_total, n->mem_free);
1318 fprintf(fp, "# node%u cpu list : ", n->node);
1319 cpu_map__fprintf(n->map, fp);
1323 static void print_cpuid(struct perf_header *ph, int fd __maybe_unused, FILE *fp)
1325 fprintf(fp, "# cpuid : %s\n", ph->env.cpuid);
1328 static void print_branch_stack(struct perf_header *ph __maybe_unused,
1329 int fd __maybe_unused, FILE *fp)
1331 fprintf(fp, "# contains samples with branch stack\n");
1334 static void print_auxtrace(struct perf_header *ph __maybe_unused,
1335 int fd __maybe_unused, FILE *fp)
1337 fprintf(fp, "# contains AUX area data (e.g. instruction trace)\n");
1340 static void print_stat(struct perf_header *ph __maybe_unused,
1341 int fd __maybe_unused, FILE *fp)
1343 fprintf(fp, "# contains stat data\n");
1346 static void print_cache(struct perf_header *ph __maybe_unused,
1347 int fd __maybe_unused, FILE *fp __maybe_unused)
1351 fprintf(fp, "# CPU cache info:\n");
1352 for (i = 0; i < ph->env.caches_cnt; i++) {
1354 cpu_cache_level__fprintf(fp, &ph->env.caches[i]);
1358 static void print_pmu_mappings(struct perf_header *ph, int fd __maybe_unused,
1361 const char *delimiter = "# pmu mappings: ";
1366 pmu_num = ph->env.nr_pmu_mappings;
1368 fprintf(fp, "# pmu mappings: not available\n");
1372 str = ph->env.pmu_mappings;
1375 type = strtoul(str, &tmp, 0);
1380 fprintf(fp, "%s%s = %" PRIu32, delimiter, str, type);
1383 str += strlen(str) + 1;
1392 fprintf(fp, "# pmu mappings: unable to read\n");
1395 static void print_group_desc(struct perf_header *ph, int fd __maybe_unused,
1398 struct perf_session *session;
1399 struct perf_evsel *evsel;
1402 session = container_of(ph, struct perf_session, header);
1404 evlist__for_each_entry(session->evlist, evsel) {
1405 if (perf_evsel__is_group_leader(evsel) &&
1406 evsel->nr_members > 1) {
1407 fprintf(fp, "# group: %s{%s", evsel->group_name ?: "",
1408 perf_evsel__name(evsel));
1410 nr = evsel->nr_members - 1;
1412 fprintf(fp, ",%s", perf_evsel__name(evsel));
1420 static int __event_process_build_id(struct build_id_event *bev,
1422 struct perf_session *session)
1425 struct machine *machine;
1428 enum dso_kernel_type dso_type;
1430 machine = perf_session__findnew_machine(session, bev->pid);
1434 cpumode = bev->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
1437 case PERF_RECORD_MISC_KERNEL:
1438 dso_type = DSO_TYPE_KERNEL;
1440 case PERF_RECORD_MISC_GUEST_KERNEL:
1441 dso_type = DSO_TYPE_GUEST_KERNEL;
1443 case PERF_RECORD_MISC_USER:
1444 case PERF_RECORD_MISC_GUEST_USER:
1445 dso_type = DSO_TYPE_USER;
1451 dso = machine__findnew_dso(machine, filename);
1453 char sbuild_id[SBUILD_ID_SIZE];
1455 dso__set_build_id(dso, &bev->build_id);
1457 if (dso_type != DSO_TYPE_USER) {
1458 struct kmod_path m = { .name = NULL, };
1460 if (!kmod_path__parse_name(&m, filename) && m.kmod)
1461 dso__set_short_name(dso, strdup(m.name), true);
1463 dso->kernel = dso_type;
1468 build_id__sprintf(dso->build_id, sizeof(dso->build_id),
1470 pr_debug("build id event received for %s: %s\n",
1471 dso->long_name, sbuild_id);
1480 static int perf_header__read_build_ids_abi_quirk(struct perf_header *header,
1481 int input, u64 offset, u64 size)
1483 struct perf_session *session = container_of(header, struct perf_session, header);
1485 struct perf_event_header header;
1486 u8 build_id[PERF_ALIGN(BUILD_ID_SIZE, sizeof(u64))];
1489 struct build_id_event bev;
1490 char filename[PATH_MAX];
1491 u64 limit = offset + size;
1493 while (offset < limit) {
1496 if (readn(input, &old_bev, sizeof(old_bev)) != sizeof(old_bev))
1499 if (header->needs_swap)
1500 perf_event_header__bswap(&old_bev.header);
1502 len = old_bev.header.size - sizeof(old_bev);
1503 if (readn(input, filename, len) != len)
1506 bev.header = old_bev.header;
1509 * As the pid is the missing value, we need to fill
1510 * it properly. The header.misc value give us nice hint.
1512 bev.pid = HOST_KERNEL_ID;
1513 if (bev.header.misc == PERF_RECORD_MISC_GUEST_USER ||
1514 bev.header.misc == PERF_RECORD_MISC_GUEST_KERNEL)
1515 bev.pid = DEFAULT_GUEST_KERNEL_ID;
1517 memcpy(bev.build_id, old_bev.build_id, sizeof(bev.build_id));
1518 __event_process_build_id(&bev, filename, session);
1520 offset += bev.header.size;
1526 static int perf_header__read_build_ids(struct perf_header *header,
1527 int input, u64 offset, u64 size)
1529 struct perf_session *session = container_of(header, struct perf_session, header);
1530 struct build_id_event bev;
1531 char filename[PATH_MAX];
1532 u64 limit = offset + size, orig_offset = offset;
1535 while (offset < limit) {
1538 if (readn(input, &bev, sizeof(bev)) != sizeof(bev))
1541 if (header->needs_swap)
1542 perf_event_header__bswap(&bev.header);
1544 len = bev.header.size - sizeof(bev);
1545 if (readn(input, filename, len) != len)
1548 * The a1645ce1 changeset:
1550 * "perf: 'perf kvm' tool for monitoring guest performance from host"
1552 * Added a field to struct build_id_event that broke the file
1555 * Since the kernel build-id is the first entry, process the
1556 * table using the old format if the well known
1557 * '[kernel.kallsyms]' string for the kernel build-id has the
1558 * first 4 characters chopped off (where the pid_t sits).
1560 if (memcmp(filename, "nel.kallsyms]", 13) == 0) {
1561 if (lseek(input, orig_offset, SEEK_SET) == (off_t)-1)
1563 return perf_header__read_build_ids_abi_quirk(header, input, offset, size);
1566 __event_process_build_id(&bev, filename, session);
1568 offset += bev.header.size;
1575 static int process_tracing_data(struct perf_file_section *section __maybe_unused,
1576 struct perf_header *ph __maybe_unused,
1579 ssize_t ret = trace_report(fd, data, false);
1580 return ret < 0 ? -1 : 0;
1583 static int process_build_id(struct perf_file_section *section,
1584 struct perf_header *ph, int fd,
1585 void *data __maybe_unused)
1587 if (perf_header__read_build_ids(ph, fd, section->offset, section->size))
1588 pr_debug("Failed to read buildids, continuing...\n");
1592 static int process_hostname(struct perf_file_section *section __maybe_unused,
1593 struct perf_header *ph, int fd,
1594 void *data __maybe_unused)
1596 ph->env.hostname = do_read_string(fd, ph);
1597 return ph->env.hostname ? 0 : -ENOMEM;
1600 static int process_osrelease(struct perf_file_section *section __maybe_unused,
1601 struct perf_header *ph, int fd,
1602 void *data __maybe_unused)
1604 ph->env.os_release = do_read_string(fd, ph);
1605 return ph->env.os_release ? 0 : -ENOMEM;
1608 static int process_version(struct perf_file_section *section __maybe_unused,
1609 struct perf_header *ph, int fd,
1610 void *data __maybe_unused)
1612 ph->env.version = do_read_string(fd, ph);
1613 return ph->env.version ? 0 : -ENOMEM;
1616 static int process_arch(struct perf_file_section *section __maybe_unused,
1617 struct perf_header *ph, int fd,
1618 void *data __maybe_unused)
1620 ph->env.arch = do_read_string(fd, ph);
1621 return ph->env.arch ? 0 : -ENOMEM;
1624 static int process_nrcpus(struct perf_file_section *section __maybe_unused,
1625 struct perf_header *ph, int fd,
1626 void *data __maybe_unused)
1631 ret = readn(fd, &nr, sizeof(nr));
1632 if (ret != sizeof(nr))
1638 ph->env.nr_cpus_avail = nr;
1640 ret = readn(fd, &nr, sizeof(nr));
1641 if (ret != sizeof(nr))
1647 ph->env.nr_cpus_online = nr;
1651 static int process_cpudesc(struct perf_file_section *section __maybe_unused,
1652 struct perf_header *ph, int fd,
1653 void *data __maybe_unused)
1655 ph->env.cpu_desc = do_read_string(fd, ph);
1656 return ph->env.cpu_desc ? 0 : -ENOMEM;
1659 static int process_cpuid(struct perf_file_section *section __maybe_unused,
1660 struct perf_header *ph, int fd,
1661 void *data __maybe_unused)
1663 ph->env.cpuid = do_read_string(fd, ph);
1664 return ph->env.cpuid ? 0 : -ENOMEM;
1667 static int process_total_mem(struct perf_file_section *section __maybe_unused,
1668 struct perf_header *ph, int fd,
1669 void *data __maybe_unused)
1674 ret = readn(fd, &mem, sizeof(mem));
1675 if (ret != sizeof(mem))
1679 mem = bswap_64(mem);
1681 ph->env.total_mem = mem;
1685 static struct perf_evsel *
1686 perf_evlist__find_by_index(struct perf_evlist *evlist, int idx)
1688 struct perf_evsel *evsel;
1690 evlist__for_each_entry(evlist, evsel) {
1691 if (evsel->idx == idx)
1699 perf_evlist__set_event_name(struct perf_evlist *evlist,
1700 struct perf_evsel *event)
1702 struct perf_evsel *evsel;
1707 evsel = perf_evlist__find_by_index(evlist, event->idx);
1714 evsel->name = strdup(event->name);
1718 process_event_desc(struct perf_file_section *section __maybe_unused,
1719 struct perf_header *header, int fd,
1720 void *data __maybe_unused)
1722 struct perf_session *session;
1723 struct perf_evsel *evsel, *events = read_event_desc(header, fd);
1728 session = container_of(header, struct perf_session, header);
1729 for (evsel = events; evsel->attr.size; evsel++)
1730 perf_evlist__set_event_name(session->evlist, evsel);
1732 free_event_desc(events);
1737 static int process_cmdline(struct perf_file_section *section,
1738 struct perf_header *ph, int fd,
1739 void *data __maybe_unused)
1742 char *str, *cmdline = NULL, **argv = NULL;
1745 ret = readn(fd, &nr, sizeof(nr));
1746 if (ret != sizeof(nr))
1752 ph->env.nr_cmdline = nr;
1754 cmdline = zalloc(section->size + nr + 1);
1758 argv = zalloc(sizeof(char *) * (nr + 1));
1762 for (i = 0; i < nr; i++) {
1763 str = do_read_string(fd, ph);
1767 argv[i] = cmdline + len;
1768 memcpy(argv[i], str, strlen(str) + 1);
1769 len += strlen(str) + 1;
1772 ph->env.cmdline = cmdline;
1773 ph->env.cmdline_argv = (const char **) argv;
1782 static int process_cpu_topology(struct perf_file_section *section,
1783 struct perf_header *ph, int fd,
1784 void *data __maybe_unused)
1790 int cpu_nr = ph->env.nr_cpus_online;
1793 ph->env.cpu = calloc(cpu_nr, sizeof(*ph->env.cpu));
1797 ret = readn(fd, &nr, sizeof(nr));
1798 if (ret != sizeof(nr))
1804 ph->env.nr_sibling_cores = nr;
1805 size += sizeof(u32);
1806 if (strbuf_init(&sb, 128) < 0)
1809 for (i = 0; i < nr; i++) {
1810 str = do_read_string(fd, ph);
1814 /* include a NULL character at the end */
1815 if (strbuf_add(&sb, str, strlen(str) + 1) < 0)
1817 size += string_size(str);
1820 ph->env.sibling_cores = strbuf_detach(&sb, NULL);
1822 ret = readn(fd, &nr, sizeof(nr));
1823 if (ret != sizeof(nr))
1829 ph->env.nr_sibling_threads = nr;
1830 size += sizeof(u32);
1832 for (i = 0; i < nr; i++) {
1833 str = do_read_string(fd, ph);
1837 /* include a NULL character at the end */
1838 if (strbuf_add(&sb, str, strlen(str) + 1) < 0)
1840 size += string_size(str);
1843 ph->env.sibling_threads = strbuf_detach(&sb, NULL);
1846 * The header may be from old perf,
1847 * which doesn't include core id and socket id information.
1849 if (section->size <= size) {
1850 zfree(&ph->env.cpu);
1854 for (i = 0; i < (u32)cpu_nr; i++) {
1855 ret = readn(fd, &nr, sizeof(nr));
1856 if (ret != sizeof(nr))
1862 ph->env.cpu[i].core_id = nr;
1864 ret = readn(fd, &nr, sizeof(nr));
1865 if (ret != sizeof(nr))
1871 if (nr > (u32)cpu_nr) {
1872 pr_debug("socket_id number is too big."
1873 "You may need to upgrade the perf tool.\n");
1877 ph->env.cpu[i].socket_id = nr;
1883 strbuf_release(&sb);
1885 zfree(&ph->env.cpu);
1889 static int process_numa_topology(struct perf_file_section *section __maybe_unused,
1890 struct perf_header *ph, int fd,
1891 void *data __maybe_unused)
1893 struct numa_node *nodes, *n;
1899 ret = readn(fd, &nr, sizeof(nr));
1900 if (ret != sizeof(nr))
1906 nodes = zalloc(sizeof(*nodes) * nr);
1910 for (i = 0; i < nr; i++) {
1914 ret = readn(fd, &n->node, sizeof(u32));
1915 if (ret != sizeof(n->node))
1918 ret = readn(fd, &n->mem_total, sizeof(u64));
1919 if (ret != sizeof(u64))
1922 ret = readn(fd, &n->mem_free, sizeof(u64));
1923 if (ret != sizeof(u64))
1926 if (ph->needs_swap) {
1927 n->node = bswap_32(n->node);
1928 n->mem_total = bswap_64(n->mem_total);
1929 n->mem_free = bswap_64(n->mem_free);
1932 str = do_read_string(fd, ph);
1936 n->map = cpu_map__new(str);
1942 ph->env.nr_numa_nodes = nr;
1943 ph->env.numa_nodes = nodes;
1951 static int process_pmu_mappings(struct perf_file_section *section __maybe_unused,
1952 struct perf_header *ph, int fd,
1953 void *data __maybe_unused)
1961 ret = readn(fd, &pmu_num, sizeof(pmu_num));
1962 if (ret != sizeof(pmu_num))
1966 pmu_num = bswap_32(pmu_num);
1969 pr_debug("pmu mappings not available\n");
1973 ph->env.nr_pmu_mappings = pmu_num;
1974 if (strbuf_init(&sb, 128) < 0)
1978 if (readn(fd, &type, sizeof(type)) != sizeof(type))
1981 type = bswap_32(type);
1983 name = do_read_string(fd, ph);
1987 if (strbuf_addf(&sb, "%u:%s", type, name) < 0)
1989 /* include a NULL character at the end */
1990 if (strbuf_add(&sb, "", 1) < 0)
1993 if (!strcmp(name, "msr"))
1994 ph->env.msr_pmu_type = type;
1999 ph->env.pmu_mappings = strbuf_detach(&sb, NULL);
2003 strbuf_release(&sb);
2007 static int process_group_desc(struct perf_file_section *section __maybe_unused,
2008 struct perf_header *ph, int fd,
2009 void *data __maybe_unused)
2012 u32 i, nr, nr_groups;
2013 struct perf_session *session;
2014 struct perf_evsel *evsel, *leader = NULL;
2021 if (readn(fd, &nr_groups, sizeof(nr_groups)) != sizeof(nr_groups))
2025 nr_groups = bswap_32(nr_groups);
2027 ph->env.nr_groups = nr_groups;
2029 pr_debug("group desc not available\n");
2033 desc = calloc(nr_groups, sizeof(*desc));
2037 for (i = 0; i < nr_groups; i++) {
2038 desc[i].name = do_read_string(fd, ph);
2042 if (readn(fd, &desc[i].leader_idx, sizeof(u32)) != sizeof(u32))
2045 if (readn(fd, &desc[i].nr_members, sizeof(u32)) != sizeof(u32))
2048 if (ph->needs_swap) {
2049 desc[i].leader_idx = bswap_32(desc[i].leader_idx);
2050 desc[i].nr_members = bswap_32(desc[i].nr_members);
2055 * Rebuild group relationship based on the group_desc
2057 session = container_of(ph, struct perf_session, header);
2058 session->evlist->nr_groups = nr_groups;
2061 evlist__for_each_entry(session->evlist, evsel) {
2062 if (evsel->idx == (int) desc[i].leader_idx) {
2063 evsel->leader = evsel;
2064 /* {anon_group} is a dummy name */
2065 if (strcmp(desc[i].name, "{anon_group}")) {
2066 evsel->group_name = desc[i].name;
2067 desc[i].name = NULL;
2069 evsel->nr_members = desc[i].nr_members;
2071 if (i >= nr_groups || nr > 0) {
2072 pr_debug("invalid group desc\n");
2077 nr = evsel->nr_members - 1;
2080 /* This is a group member */
2081 evsel->leader = leader;
2087 if (i != nr_groups || nr != 0) {
2088 pr_debug("invalid group desc\n");
2094 for (i = 0; i < nr_groups; i++)
2095 zfree(&desc[i].name);
2101 static int process_auxtrace(struct perf_file_section *section,
2102 struct perf_header *ph, int fd,
2103 void *data __maybe_unused)
2105 struct perf_session *session;
2108 session = container_of(ph, struct perf_session, header);
2110 err = auxtrace_index__process(fd, section->size, session,
2113 pr_err("Failed to process auxtrace index\n");
2117 static int process_cache(struct perf_file_section *section __maybe_unused,
2118 struct perf_header *ph __maybe_unused, int fd __maybe_unused,
2119 void *data __maybe_unused)
2121 struct cpu_cache_level *caches;
2122 u32 cnt, i, version;
2124 if (readn(fd, &version, sizeof(version)) != sizeof(version))
2128 version = bswap_32(version);
2133 if (readn(fd, &cnt, sizeof(cnt)) != sizeof(cnt))
2137 cnt = bswap_32(cnt);
2139 caches = zalloc(sizeof(*caches) * cnt);
2143 for (i = 0; i < cnt; i++) {
2144 struct cpu_cache_level c;
2147 if (readn(fd, &c.v, sizeof(u32)) != sizeof(u32))\
2148 goto out_free_caches; \
2149 if (ph->needs_swap) \
2150 c.v = bswap_32(c.v); \
2159 c.v = do_read_string(fd, ph); \
2161 goto out_free_caches;
2171 ph->env.caches = caches;
2172 ph->env.caches_cnt = cnt;
2179 struct feature_ops {
2180 int (*write)(int fd, struct perf_header *h, struct perf_evlist *evlist);
2181 void (*print)(struct perf_header *h, int fd, FILE *fp);
2182 int (*process)(struct perf_file_section *section,
2183 struct perf_header *h, int fd, void *data);
2188 #define FEAT_OPA(n, func) \
2189 [n] = { .name = #n, .write = write_##func, .print = print_##func }
2190 #define FEAT_OPP(n, func) \
2191 [n] = { .name = #n, .write = write_##func, .print = print_##func, \
2192 .process = process_##func }
2193 #define FEAT_OPF(n, func) \
2194 [n] = { .name = #n, .write = write_##func, .print = print_##func, \
2195 .process = process_##func, .full_only = true }
2197 /* feature_ops not implemented: */
2198 #define print_tracing_data NULL
2199 #define print_build_id NULL
2201 static const struct feature_ops feat_ops[HEADER_LAST_FEATURE] = {
2202 FEAT_OPP(HEADER_TRACING_DATA, tracing_data),
2203 FEAT_OPP(HEADER_BUILD_ID, build_id),
2204 FEAT_OPP(HEADER_HOSTNAME, hostname),
2205 FEAT_OPP(HEADER_OSRELEASE, osrelease),
2206 FEAT_OPP(HEADER_VERSION, version),
2207 FEAT_OPP(HEADER_ARCH, arch),
2208 FEAT_OPP(HEADER_NRCPUS, nrcpus),
2209 FEAT_OPP(HEADER_CPUDESC, cpudesc),
2210 FEAT_OPP(HEADER_CPUID, cpuid),
2211 FEAT_OPP(HEADER_TOTAL_MEM, total_mem),
2212 FEAT_OPP(HEADER_EVENT_DESC, event_desc),
2213 FEAT_OPP(HEADER_CMDLINE, cmdline),
2214 FEAT_OPF(HEADER_CPU_TOPOLOGY, cpu_topology),
2215 FEAT_OPF(HEADER_NUMA_TOPOLOGY, numa_topology),
2216 FEAT_OPA(HEADER_BRANCH_STACK, branch_stack),
2217 FEAT_OPP(HEADER_PMU_MAPPINGS, pmu_mappings),
2218 FEAT_OPP(HEADER_GROUP_DESC, group_desc),
2219 FEAT_OPP(HEADER_AUXTRACE, auxtrace),
2220 FEAT_OPA(HEADER_STAT, stat),
2221 FEAT_OPF(HEADER_CACHE, cache),
2224 struct header_print_data {
2226 bool full; /* extended list of headers */
2229 static int perf_file_section__fprintf_info(struct perf_file_section *section,
2230 struct perf_header *ph,
2231 int feat, int fd, void *data)
2233 struct header_print_data *hd = data;
2235 if (lseek(fd, section->offset, SEEK_SET) == (off_t)-1) {
2236 pr_debug("Failed to lseek to %" PRIu64 " offset for feature "
2237 "%d, continuing...\n", section->offset, feat);
2240 if (feat >= HEADER_LAST_FEATURE) {
2241 pr_warning("unknown feature %d\n", feat);
2244 if (!feat_ops[feat].print)
2247 if (!feat_ops[feat].full_only || hd->full)
2248 feat_ops[feat].print(ph, fd, hd->fp);
2250 fprintf(hd->fp, "# %s info available, use -I to display\n",
2251 feat_ops[feat].name);
2256 int perf_header__fprintf_info(struct perf_session *session, FILE *fp, bool full)
2258 struct header_print_data hd;
2259 struct perf_header *header = &session->header;
2260 int fd = perf_data_file__fd(session->file);
2264 perf_header__process_sections(header, fd, &hd,
2265 perf_file_section__fprintf_info);
2269 static int do_write_feat(int fd, struct perf_header *h, int type,
2270 struct perf_file_section **p,
2271 struct perf_evlist *evlist)
2276 if (perf_header__has_feat(h, type)) {
2277 if (!feat_ops[type].write)
2280 (*p)->offset = lseek(fd, 0, SEEK_CUR);
2282 err = feat_ops[type].write(fd, h, evlist);
2284 pr_debug("failed to write feature %d\n", type);
2286 /* undo anything written */
2287 lseek(fd, (*p)->offset, SEEK_SET);
2291 (*p)->size = lseek(fd, 0, SEEK_CUR) - (*p)->offset;
2297 static int perf_header__adds_write(struct perf_header *header,
2298 struct perf_evlist *evlist, int fd)
2301 struct perf_file_section *feat_sec, *p;
2307 nr_sections = bitmap_weight(header->adds_features, HEADER_FEAT_BITS);
2311 feat_sec = p = calloc(nr_sections, sizeof(*feat_sec));
2312 if (feat_sec == NULL)
2315 sec_size = sizeof(*feat_sec) * nr_sections;
2317 sec_start = header->feat_offset;
2318 lseek(fd, sec_start + sec_size, SEEK_SET);
2320 for_each_set_bit(feat, header->adds_features, HEADER_FEAT_BITS) {
2321 if (do_write_feat(fd, header, feat, &p, evlist))
2322 perf_header__clear_feat(header, feat);
2325 lseek(fd, sec_start, SEEK_SET);
2327 * may write more than needed due to dropped feature, but
2328 * this is okay, reader will skip the mising entries
2330 err = do_write(fd, feat_sec, sec_size);
2332 pr_debug("failed to write feature section\n");
2337 int perf_header__write_pipe(int fd)
2339 struct perf_pipe_file_header f_header;
2342 f_header = (struct perf_pipe_file_header){
2343 .magic = PERF_MAGIC,
2344 .size = sizeof(f_header),
2347 err = do_write(fd, &f_header, sizeof(f_header));
2349 pr_debug("failed to write perf pipe header\n");
2356 int perf_session__write_header(struct perf_session *session,
2357 struct perf_evlist *evlist,
2358 int fd, bool at_exit)
2360 struct perf_file_header f_header;
2361 struct perf_file_attr f_attr;
2362 struct perf_header *header = &session->header;
2363 struct perf_evsel *evsel;
2367 lseek(fd, sizeof(f_header), SEEK_SET);
2369 evlist__for_each_entry(session->evlist, evsel) {
2370 evsel->id_offset = lseek(fd, 0, SEEK_CUR);
2371 err = do_write(fd, evsel->id, evsel->ids * sizeof(u64));
2373 pr_debug("failed to write perf header\n");
2378 attr_offset = lseek(fd, 0, SEEK_CUR);
2380 evlist__for_each_entry(evlist, evsel) {
2381 f_attr = (struct perf_file_attr){
2382 .attr = evsel->attr,
2384 .offset = evsel->id_offset,
2385 .size = evsel->ids * sizeof(u64),
2388 err = do_write(fd, &f_attr, sizeof(f_attr));
2390 pr_debug("failed to write perf header attribute\n");
2395 if (!header->data_offset)
2396 header->data_offset = lseek(fd, 0, SEEK_CUR);
2397 header->feat_offset = header->data_offset + header->data_size;
2400 err = perf_header__adds_write(header, evlist, fd);
2405 f_header = (struct perf_file_header){
2406 .magic = PERF_MAGIC,
2407 .size = sizeof(f_header),
2408 .attr_size = sizeof(f_attr),
2410 .offset = attr_offset,
2411 .size = evlist->nr_entries * sizeof(f_attr),
2414 .offset = header->data_offset,
2415 .size = header->data_size,
2417 /* event_types is ignored, store zeros */
2420 memcpy(&f_header.adds_features, &header->adds_features, sizeof(header->adds_features));
2422 lseek(fd, 0, SEEK_SET);
2423 err = do_write(fd, &f_header, sizeof(f_header));
2425 pr_debug("failed to write perf header\n");
2428 lseek(fd, header->data_offset + header->data_size, SEEK_SET);
2433 static int perf_header__getbuffer64(struct perf_header *header,
2434 int fd, void *buf, size_t size)
2436 if (readn(fd, buf, size) <= 0)
2439 if (header->needs_swap)
2440 mem_bswap_64(buf, size);
2445 int perf_header__process_sections(struct perf_header *header, int fd,
2447 int (*process)(struct perf_file_section *section,
2448 struct perf_header *ph,
2449 int feat, int fd, void *data))
2451 struct perf_file_section *feat_sec, *sec;
2457 nr_sections = bitmap_weight(header->adds_features, HEADER_FEAT_BITS);
2461 feat_sec = sec = calloc(nr_sections, sizeof(*feat_sec));
2465 sec_size = sizeof(*feat_sec) * nr_sections;
2467 lseek(fd, header->feat_offset, SEEK_SET);
2469 err = perf_header__getbuffer64(header, fd, feat_sec, sec_size);
2473 for_each_set_bit(feat, header->adds_features, HEADER_LAST_FEATURE) {
2474 err = process(sec++, header, feat, fd, data);
2484 static const int attr_file_abi_sizes[] = {
2485 [0] = PERF_ATTR_SIZE_VER0,
2486 [1] = PERF_ATTR_SIZE_VER1,
2487 [2] = PERF_ATTR_SIZE_VER2,
2488 [3] = PERF_ATTR_SIZE_VER3,
2489 [4] = PERF_ATTR_SIZE_VER4,
2494 * In the legacy file format, the magic number is not used to encode endianness.
2495 * hdr_sz was used to encode endianness. But given that hdr_sz can vary based
2496 * on ABI revisions, we need to try all combinations for all endianness to
2497 * detect the endianness.
2499 static int try_all_file_abis(uint64_t hdr_sz, struct perf_header *ph)
2501 uint64_t ref_size, attr_size;
2504 for (i = 0 ; attr_file_abi_sizes[i]; i++) {
2505 ref_size = attr_file_abi_sizes[i]
2506 + sizeof(struct perf_file_section);
2507 if (hdr_sz != ref_size) {
2508 attr_size = bswap_64(hdr_sz);
2509 if (attr_size != ref_size)
2512 ph->needs_swap = true;
2514 pr_debug("ABI%d perf.data file detected, need_swap=%d\n",
2519 /* could not determine endianness */
2523 #define PERF_PIPE_HDR_VER0 16
2525 static const size_t attr_pipe_abi_sizes[] = {
2526 [0] = PERF_PIPE_HDR_VER0,
2531 * In the legacy pipe format, there is an implicit assumption that endiannesss
2532 * between host recording the samples, and host parsing the samples is the
2533 * same. This is not always the case given that the pipe output may always be
2534 * redirected into a file and analyzed on a different machine with possibly a
2535 * different endianness and perf_event ABI revsions in the perf tool itself.
2537 static int try_all_pipe_abis(uint64_t hdr_sz, struct perf_header *ph)
2542 for (i = 0 ; attr_pipe_abi_sizes[i]; i++) {
2543 if (hdr_sz != attr_pipe_abi_sizes[i]) {
2544 attr_size = bswap_64(hdr_sz);
2545 if (attr_size != hdr_sz)
2548 ph->needs_swap = true;
2550 pr_debug("Pipe ABI%d perf.data file detected\n", i);
2556 bool is_perf_magic(u64 magic)
2558 if (!memcmp(&magic, __perf_magic1, sizeof(magic))
2559 || magic == __perf_magic2
2560 || magic == __perf_magic2_sw)
2566 static int check_magic_endian(u64 magic, uint64_t hdr_sz,
2567 bool is_pipe, struct perf_header *ph)
2571 /* check for legacy format */
2572 ret = memcmp(&magic, __perf_magic1, sizeof(magic));
2574 ph->version = PERF_HEADER_VERSION_1;
2575 pr_debug("legacy perf.data format\n");
2577 return try_all_pipe_abis(hdr_sz, ph);
2579 return try_all_file_abis(hdr_sz, ph);
2582 * the new magic number serves two purposes:
2583 * - unique number to identify actual perf.data files
2584 * - encode endianness of file
2586 ph->version = PERF_HEADER_VERSION_2;
2588 /* check magic number with one endianness */
2589 if (magic == __perf_magic2)
2592 /* check magic number with opposite endianness */
2593 if (magic != __perf_magic2_sw)
2596 ph->needs_swap = true;
2601 int perf_file_header__read(struct perf_file_header *header,
2602 struct perf_header *ph, int fd)
2606 lseek(fd, 0, SEEK_SET);
2608 ret = readn(fd, header, sizeof(*header));
2612 if (check_magic_endian(header->magic,
2613 header->attr_size, false, ph) < 0) {
2614 pr_debug("magic/endian check failed\n");
2618 if (ph->needs_swap) {
2619 mem_bswap_64(header, offsetof(struct perf_file_header,
2623 if (header->size != sizeof(*header)) {
2624 /* Support the previous format */
2625 if (header->size == offsetof(typeof(*header), adds_features))
2626 bitmap_zero(header->adds_features, HEADER_FEAT_BITS);
2629 } else if (ph->needs_swap) {
2631 * feature bitmap is declared as an array of unsigned longs --
2632 * not good since its size can differ between the host that
2633 * generated the data file and the host analyzing the file.
2635 * We need to handle endianness, but we don't know the size of
2636 * the unsigned long where the file was generated. Take a best
2637 * guess at determining it: try 64-bit swap first (ie., file
2638 * created on a 64-bit host), and check if the hostname feature
2639 * bit is set (this feature bit is forced on as of fbe96f2).
2640 * If the bit is not, undo the 64-bit swap and try a 32-bit
2641 * swap. If the hostname bit is still not set (e.g., older data
2642 * file), punt and fallback to the original behavior --
2643 * clearing all feature bits and setting buildid.
2645 mem_bswap_64(&header->adds_features,
2646 BITS_TO_U64(HEADER_FEAT_BITS));
2648 if (!test_bit(HEADER_HOSTNAME, header->adds_features)) {
2650 mem_bswap_64(&header->adds_features,
2651 BITS_TO_U64(HEADER_FEAT_BITS));
2654 mem_bswap_32(&header->adds_features,
2655 BITS_TO_U32(HEADER_FEAT_BITS));
2658 if (!test_bit(HEADER_HOSTNAME, header->adds_features)) {
2659 bitmap_zero(header->adds_features, HEADER_FEAT_BITS);
2660 set_bit(HEADER_BUILD_ID, header->adds_features);
2664 memcpy(&ph->adds_features, &header->adds_features,
2665 sizeof(ph->adds_features));
2667 ph->data_offset = header->data.offset;
2668 ph->data_size = header->data.size;
2669 ph->feat_offset = header->data.offset + header->data.size;
2673 static int perf_file_section__process(struct perf_file_section *section,
2674 struct perf_header *ph,
2675 int feat, int fd, void *data)
2677 if (lseek(fd, section->offset, SEEK_SET) == (off_t)-1) {
2678 pr_debug("Failed to lseek to %" PRIu64 " offset for feature "
2679 "%d, continuing...\n", section->offset, feat);
2683 if (feat >= HEADER_LAST_FEATURE) {
2684 pr_debug("unknown feature %d, continuing...\n", feat);
2688 if (!feat_ops[feat].process)
2691 return feat_ops[feat].process(section, ph, fd, data);
2694 static int perf_file_header__read_pipe(struct perf_pipe_file_header *header,
2695 struct perf_header *ph, int fd,
2700 ret = readn(fd, header, sizeof(*header));
2704 if (check_magic_endian(header->magic, header->size, true, ph) < 0) {
2705 pr_debug("endian/magic failed\n");
2710 header->size = bswap_64(header->size);
2712 if (repipe && do_write(STDOUT_FILENO, header, sizeof(*header)) < 0)
2718 static int perf_header__read_pipe(struct perf_session *session)
2720 struct perf_header *header = &session->header;
2721 struct perf_pipe_file_header f_header;
2723 if (perf_file_header__read_pipe(&f_header, header,
2724 perf_data_file__fd(session->file),
2725 session->repipe) < 0) {
2726 pr_debug("incompatible file format\n");
2733 static int read_attr(int fd, struct perf_header *ph,
2734 struct perf_file_attr *f_attr)
2736 struct perf_event_attr *attr = &f_attr->attr;
2738 size_t our_sz = sizeof(f_attr->attr);
2741 memset(f_attr, 0, sizeof(*f_attr));
2743 /* read minimal guaranteed structure */
2744 ret = readn(fd, attr, PERF_ATTR_SIZE_VER0);
2746 pr_debug("cannot read %d bytes of header attr\n",
2747 PERF_ATTR_SIZE_VER0);
2751 /* on file perf_event_attr size */
2759 sz = PERF_ATTR_SIZE_VER0;
2760 } else if (sz > our_sz) {
2761 pr_debug("file uses a more recent and unsupported ABI"
2762 " (%zu bytes extra)\n", sz - our_sz);
2765 /* what we have not yet read and that we know about */
2766 left = sz - PERF_ATTR_SIZE_VER0;
2769 ptr += PERF_ATTR_SIZE_VER0;
2771 ret = readn(fd, ptr, left);
2773 /* read perf_file_section, ids are read in caller */
2774 ret = readn(fd, &f_attr->ids, sizeof(f_attr->ids));
2776 return ret <= 0 ? -1 : 0;
2779 static int perf_evsel__prepare_tracepoint_event(struct perf_evsel *evsel,
2780 struct pevent *pevent)
2782 struct event_format *event;
2785 /* already prepared */
2786 if (evsel->tp_format)
2789 if (pevent == NULL) {
2790 pr_debug("broken or missing trace data\n");
2794 event = pevent_find_event(pevent, evsel->attr.config);
2799 snprintf(bf, sizeof(bf), "%s:%s", event->system, event->name);
2800 evsel->name = strdup(bf);
2801 if (evsel->name == NULL)
2805 evsel->tp_format = event;
2809 static int perf_evlist__prepare_tracepoint_events(struct perf_evlist *evlist,
2810 struct pevent *pevent)
2812 struct perf_evsel *pos;
2814 evlist__for_each_entry(evlist, pos) {
2815 if (pos->attr.type == PERF_TYPE_TRACEPOINT &&
2816 perf_evsel__prepare_tracepoint_event(pos, pevent))
2823 int perf_session__read_header(struct perf_session *session)
2825 struct perf_data_file *file = session->file;
2826 struct perf_header *header = &session->header;
2827 struct perf_file_header f_header;
2828 struct perf_file_attr f_attr;
2830 int nr_attrs, nr_ids, i, j;
2831 int fd = perf_data_file__fd(file);
2833 session->evlist = perf_evlist__new();
2834 if (session->evlist == NULL)
2837 session->evlist->env = &header->env;
2838 session->machines.host.env = &header->env;
2839 if (perf_data_file__is_pipe(file))
2840 return perf_header__read_pipe(session);
2842 if (perf_file_header__read(&f_header, header, fd) < 0)
2846 * Sanity check that perf.data was written cleanly; data size is
2847 * initialized to 0 and updated only if the on_exit function is run.
2848 * If data size is still 0 then the file contains only partial
2849 * information. Just warn user and process it as much as it can.
2851 if (f_header.data.size == 0) {
2852 pr_warning("WARNING: The %s file's data size field is 0 which is unexpected.\n"
2853 "Was the 'perf record' command properly terminated?\n",
2857 if (f_header.attr_size == 0) {
2858 pr_err("ERROR: The %s file's attr size field is 0 which is unexpected.\n"
2859 "Was the 'perf record' command properly terminated?\n",
2864 nr_attrs = f_header.attrs.size / f_header.attr_size;
2865 lseek(fd, f_header.attrs.offset, SEEK_SET);
2867 for (i = 0; i < nr_attrs; i++) {
2868 struct perf_evsel *evsel;
2871 if (read_attr(fd, header, &f_attr) < 0)
2874 if (header->needs_swap) {
2875 f_attr.ids.size = bswap_64(f_attr.ids.size);
2876 f_attr.ids.offset = bswap_64(f_attr.ids.offset);
2877 perf_event__attr_swap(&f_attr.attr);
2880 tmp = lseek(fd, 0, SEEK_CUR);
2881 evsel = perf_evsel__new(&f_attr.attr);
2884 goto out_delete_evlist;
2886 evsel->needs_swap = header->needs_swap;
2888 * Do it before so that if perf_evsel__alloc_id fails, this
2889 * entry gets purged too at perf_evlist__delete().
2891 perf_evlist__add(session->evlist, evsel);
2893 nr_ids = f_attr.ids.size / sizeof(u64);
2895 * We don't have the cpu and thread maps on the header, so
2896 * for allocating the perf_sample_id table we fake 1 cpu and
2897 * hattr->ids threads.
2899 if (perf_evsel__alloc_id(evsel, 1, nr_ids))
2900 goto out_delete_evlist;
2902 lseek(fd, f_attr.ids.offset, SEEK_SET);
2904 for (j = 0; j < nr_ids; j++) {
2905 if (perf_header__getbuffer64(header, fd, &f_id, sizeof(f_id)))
2908 perf_evlist__id_add(session->evlist, evsel, 0, j, f_id);
2911 lseek(fd, tmp, SEEK_SET);
2914 symbol_conf.nr_events = nr_attrs;
2916 perf_header__process_sections(header, fd, &session->tevent,
2917 perf_file_section__process);
2919 if (perf_evlist__prepare_tracepoint_events(session->evlist,
2920 session->tevent.pevent))
2921 goto out_delete_evlist;
2928 perf_evlist__delete(session->evlist);
2929 session->evlist = NULL;
2933 int perf_event__synthesize_attr(struct perf_tool *tool,
2934 struct perf_event_attr *attr, u32 ids, u64 *id,
2935 perf_event__handler_t process)
2937 union perf_event *ev;
2941 size = sizeof(struct perf_event_attr);
2942 size = PERF_ALIGN(size, sizeof(u64));
2943 size += sizeof(struct perf_event_header);
2944 size += ids * sizeof(u64);
2951 ev->attr.attr = *attr;
2952 memcpy(ev->attr.id, id, ids * sizeof(u64));
2954 ev->attr.header.type = PERF_RECORD_HEADER_ATTR;
2955 ev->attr.header.size = (u16)size;
2957 if (ev->attr.header.size == size)
2958 err = process(tool, ev, NULL, NULL);
2967 static struct event_update_event *
2968 event_update_event__new(size_t size, u64 type, u64 id)
2970 struct event_update_event *ev;
2972 size += sizeof(*ev);
2973 size = PERF_ALIGN(size, sizeof(u64));
2977 ev->header.type = PERF_RECORD_EVENT_UPDATE;
2978 ev->header.size = (u16)size;
2986 perf_event__synthesize_event_update_unit(struct perf_tool *tool,
2987 struct perf_evsel *evsel,
2988 perf_event__handler_t process)
2990 struct event_update_event *ev;
2991 size_t size = strlen(evsel->unit);
2994 ev = event_update_event__new(size + 1, PERF_EVENT_UPDATE__UNIT, evsel->id[0]);
2998 strlcpy(ev->data, evsel->unit, size + 1);
2999 err = process(tool, (union perf_event *)ev, NULL, NULL);
3005 perf_event__synthesize_event_update_scale(struct perf_tool *tool,
3006 struct perf_evsel *evsel,
3007 perf_event__handler_t process)
3009 struct event_update_event *ev;
3010 struct event_update_event_scale *ev_data;
3013 ev = event_update_event__new(sizeof(*ev_data), PERF_EVENT_UPDATE__SCALE, evsel->id[0]);
3017 ev_data = (struct event_update_event_scale *) ev->data;
3018 ev_data->scale = evsel->scale;
3019 err = process(tool, (union perf_event*) ev, NULL, NULL);
3025 perf_event__synthesize_event_update_name(struct perf_tool *tool,
3026 struct perf_evsel *evsel,
3027 perf_event__handler_t process)
3029 struct event_update_event *ev;
3030 size_t len = strlen(evsel->name);
3033 ev = event_update_event__new(len + 1, PERF_EVENT_UPDATE__NAME, evsel->id[0]);
3037 strlcpy(ev->data, evsel->name, len + 1);
3038 err = process(tool, (union perf_event*) ev, NULL, NULL);
3044 perf_event__synthesize_event_update_cpus(struct perf_tool *tool,
3045 struct perf_evsel *evsel,
3046 perf_event__handler_t process)
3048 size_t size = sizeof(struct event_update_event);
3049 struct event_update_event *ev;
3053 if (!evsel->own_cpus)
3056 ev = cpu_map_data__alloc(evsel->own_cpus, &size, &type, &max);
3060 ev->header.type = PERF_RECORD_EVENT_UPDATE;
3061 ev->header.size = (u16)size;
3062 ev->type = PERF_EVENT_UPDATE__CPUS;
3063 ev->id = evsel->id[0];
3065 cpu_map_data__synthesize((struct cpu_map_data *) ev->data,
3069 err = process(tool, (union perf_event*) ev, NULL, NULL);
3074 size_t perf_event__fprintf_event_update(union perf_event *event, FILE *fp)
3076 struct event_update_event *ev = &event->event_update;
3077 struct event_update_event_scale *ev_scale;
3078 struct event_update_event_cpus *ev_cpus;
3079 struct cpu_map *map;
3082 ret = fprintf(fp, "\n... id: %" PRIu64 "\n", ev->id);
3085 case PERF_EVENT_UPDATE__SCALE:
3086 ev_scale = (struct event_update_event_scale *) ev->data;
3087 ret += fprintf(fp, "... scale: %f\n", ev_scale->scale);
3089 case PERF_EVENT_UPDATE__UNIT:
3090 ret += fprintf(fp, "... unit: %s\n", ev->data);
3092 case PERF_EVENT_UPDATE__NAME:
3093 ret += fprintf(fp, "... name: %s\n", ev->data);
3095 case PERF_EVENT_UPDATE__CPUS:
3096 ev_cpus = (struct event_update_event_cpus *) ev->data;
3097 ret += fprintf(fp, "... ");
3099 map = cpu_map__new_data(&ev_cpus->cpus);
3101 ret += cpu_map__fprintf(map, fp);
3103 ret += fprintf(fp, "failed to get cpus\n");
3106 ret += fprintf(fp, "... unknown type\n");
3113 int perf_event__synthesize_attrs(struct perf_tool *tool,
3114 struct perf_session *session,
3115 perf_event__handler_t process)
3117 struct perf_evsel *evsel;
3120 evlist__for_each_entry(session->evlist, evsel) {
3121 err = perf_event__synthesize_attr(tool, &evsel->attr, evsel->ids,
3122 evsel->id, process);
3124 pr_debug("failed to create perf header attribute\n");
3132 int perf_event__process_attr(struct perf_tool *tool __maybe_unused,
3133 union perf_event *event,
3134 struct perf_evlist **pevlist)
3137 struct perf_evsel *evsel;
3138 struct perf_evlist *evlist = *pevlist;
3140 if (evlist == NULL) {
3141 *pevlist = evlist = perf_evlist__new();
3146 evsel = perf_evsel__new(&event->attr.attr);
3150 perf_evlist__add(evlist, evsel);
3152 ids = event->header.size;
3153 ids -= (void *)&event->attr.id - (void *)event;
3154 n_ids = ids / sizeof(u64);
3156 * We don't have the cpu and thread maps on the header, so
3157 * for allocating the perf_sample_id table we fake 1 cpu and
3158 * hattr->ids threads.
3160 if (perf_evsel__alloc_id(evsel, 1, n_ids))
3163 for (i = 0; i < n_ids; i++) {
3164 perf_evlist__id_add(evlist, evsel, 0, i, event->attr.id[i]);
3167 symbol_conf.nr_events = evlist->nr_entries;
3172 int perf_event__process_event_update(struct perf_tool *tool __maybe_unused,
3173 union perf_event *event,
3174 struct perf_evlist **pevlist)
3176 struct event_update_event *ev = &event->event_update;
3177 struct event_update_event_scale *ev_scale;
3178 struct event_update_event_cpus *ev_cpus;
3179 struct perf_evlist *evlist;
3180 struct perf_evsel *evsel;
3181 struct cpu_map *map;
3183 if (!pevlist || *pevlist == NULL)
3188 evsel = perf_evlist__id2evsel(evlist, ev->id);
3193 case PERF_EVENT_UPDATE__UNIT:
3194 evsel->unit = strdup(ev->data);
3196 case PERF_EVENT_UPDATE__NAME:
3197 evsel->name = strdup(ev->data);
3199 case PERF_EVENT_UPDATE__SCALE:
3200 ev_scale = (struct event_update_event_scale *) ev->data;
3201 evsel->scale = ev_scale->scale;
3203 case PERF_EVENT_UPDATE__CPUS:
3204 ev_cpus = (struct event_update_event_cpus *) ev->data;
3206 map = cpu_map__new_data(&ev_cpus->cpus);
3208 evsel->own_cpus = map;
3210 pr_err("failed to get event_update cpus\n");
3218 int perf_event__synthesize_tracing_data(struct perf_tool *tool, int fd,
3219 struct perf_evlist *evlist,
3220 perf_event__handler_t process)
3222 union perf_event ev;
3223 struct tracing_data *tdata;
3224 ssize_t size = 0, aligned_size = 0, padding;
3225 int err __maybe_unused = 0;
3228 * We are going to store the size of the data followed
3229 * by the data contents. Since the fd descriptor is a pipe,
3230 * we cannot seek back to store the size of the data once
3231 * we know it. Instead we:
3233 * - write the tracing data to the temp file
3234 * - get/write the data size to pipe
3235 * - write the tracing data from the temp file
3238 tdata = tracing_data_get(&evlist->entries, fd, true);
3242 memset(&ev, 0, sizeof(ev));
3244 ev.tracing_data.header.type = PERF_RECORD_HEADER_TRACING_DATA;
3246 aligned_size = PERF_ALIGN(size, sizeof(u64));
3247 padding = aligned_size - size;
3248 ev.tracing_data.header.size = sizeof(ev.tracing_data);
3249 ev.tracing_data.size = aligned_size;
3251 process(tool, &ev, NULL, NULL);
3254 * The put function will copy all the tracing data
3255 * stored in temp file to the pipe.
3257 tracing_data_put(tdata);
3259 write_padded(fd, NULL, 0, padding);
3261 return aligned_size;
3264 int perf_event__process_tracing_data(struct perf_tool *tool __maybe_unused,
3265 union perf_event *event,
3266 struct perf_session *session)
3268 ssize_t size_read, padding, size = event->tracing_data.size;
3269 int fd = perf_data_file__fd(session->file);
3270 off_t offset = lseek(fd, 0, SEEK_CUR);
3273 /* setup for reading amidst mmap */
3274 lseek(fd, offset + sizeof(struct tracing_data_event),
3277 size_read = trace_report(fd, &session->tevent,
3279 padding = PERF_ALIGN(size_read, sizeof(u64)) - size_read;
3281 if (readn(fd, buf, padding) < 0) {
3282 pr_err("%s: reading input file", __func__);
3285 if (session->repipe) {
3286 int retw = write(STDOUT_FILENO, buf, padding);
3287 if (retw <= 0 || retw != padding) {
3288 pr_err("%s: repiping tracing data padding", __func__);
3293 if (size_read + padding != size) {
3294 pr_err("%s: tracing data size mismatch", __func__);
3298 perf_evlist__prepare_tracepoint_events(session->evlist,
3299 session->tevent.pevent);
3301 return size_read + padding;
3304 int perf_event__synthesize_build_id(struct perf_tool *tool,
3305 struct dso *pos, u16 misc,
3306 perf_event__handler_t process,
3307 struct machine *machine)
3309 union perf_event ev;
3316 memset(&ev, 0, sizeof(ev));
3318 len = pos->long_name_len + 1;
3319 len = PERF_ALIGN(len, NAME_ALIGN);
3320 memcpy(&ev.build_id.build_id, pos->build_id, sizeof(pos->build_id));
3321 ev.build_id.header.type = PERF_RECORD_HEADER_BUILD_ID;
3322 ev.build_id.header.misc = misc;
3323 ev.build_id.pid = machine->pid;
3324 ev.build_id.header.size = sizeof(ev.build_id) + len;
3325 memcpy(&ev.build_id.filename, pos->long_name, pos->long_name_len);
3327 err = process(tool, &ev, NULL, machine);
3332 int perf_event__process_build_id(struct perf_tool *tool __maybe_unused,
3333 union perf_event *event,
3334 struct perf_session *session)
3336 __event_process_build_id(&event->build_id,
3337 event->build_id.filename,