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(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(evlist, evsel) {
805 if (perf_evsel__is_group_leader(evsel) &&
806 evsel->nr_members > 1) {
807 const char *name = evsel->group_name ?: "{anon_group}";
808 u32 leader_idx = evsel->idx;
809 u32 nr_members = evsel->nr_members;
811 ret = do_write_string(fd, name);
815 ret = do_write(fd, &leader_idx, sizeof(leader_idx));
819 ret = do_write(fd, &nr_members, sizeof(nr_members));
828 * default get_cpuid(): nothing gets recorded
829 * actual implementation must be in arch/$(ARCH)/util/header.c
831 int __attribute__ ((weak)) get_cpuid(char *buffer __maybe_unused,
832 size_t sz __maybe_unused)
837 static int write_cpuid(int fd, struct perf_header *h __maybe_unused,
838 struct perf_evlist *evlist __maybe_unused)
843 ret = get_cpuid(buffer, sizeof(buffer));
849 return do_write_string(fd, buffer);
852 static int write_branch_stack(int fd __maybe_unused,
853 struct perf_header *h __maybe_unused,
854 struct perf_evlist *evlist __maybe_unused)
859 static int write_auxtrace(int fd, struct perf_header *h,
860 struct perf_evlist *evlist __maybe_unused)
862 struct perf_session *session;
865 session = container_of(h, struct perf_session, header);
867 err = auxtrace_index__write(fd, &session->auxtrace_index);
869 pr_err("Failed to write auxtrace index\n");
873 static int cpu_cache_level__sort(const void *a, const void *b)
875 struct cpu_cache_level *cache_a = (struct cpu_cache_level *)a;
876 struct cpu_cache_level *cache_b = (struct cpu_cache_level *)b;
878 return cache_a->level - cache_b->level;
881 static bool cpu_cache_level__cmp(struct cpu_cache_level *a, struct cpu_cache_level *b)
883 if (a->level != b->level)
886 if (a->line_size != b->line_size)
889 if (a->sets != b->sets)
892 if (a->ways != b->ways)
895 if (strcmp(a->type, b->type))
898 if (strcmp(a->size, b->size))
901 if (strcmp(a->map, b->map))
907 static int cpu_cache_level__read(struct cpu_cache_level *cache, u32 cpu, u16 level)
909 char path[PATH_MAX], file[PATH_MAX];
913 scnprintf(path, PATH_MAX, "devices/system/cpu/cpu%d/cache/index%d/", cpu, level);
914 scnprintf(file, PATH_MAX, "%s/%s", sysfs__mountpoint(), path);
919 scnprintf(file, PATH_MAX, "%s/level", path);
920 if (sysfs__read_int(file, (int *) &cache->level))
923 scnprintf(file, PATH_MAX, "%s/coherency_line_size", path);
924 if (sysfs__read_int(file, (int *) &cache->line_size))
927 scnprintf(file, PATH_MAX, "%s/number_of_sets", path);
928 if (sysfs__read_int(file, (int *) &cache->sets))
931 scnprintf(file, PATH_MAX, "%s/ways_of_associativity", path);
932 if (sysfs__read_int(file, (int *) &cache->ways))
935 scnprintf(file, PATH_MAX, "%s/type", path);
936 if (sysfs__read_str(file, &cache->type, &len))
939 cache->type[len] = 0;
940 cache->type = rtrim(cache->type);
942 scnprintf(file, PATH_MAX, "%s/size", path);
943 if (sysfs__read_str(file, &cache->size, &len)) {
948 cache->size[len] = 0;
949 cache->size = rtrim(cache->size);
951 scnprintf(file, PATH_MAX, "%s/shared_cpu_list", path);
952 if (sysfs__read_str(file, &cache->map, &len)) {
959 cache->map = rtrim(cache->map);
963 static void cpu_cache_level__fprintf(FILE *out, struct cpu_cache_level *c)
965 fprintf(out, "L%d %-15s %8s [%s]\n", c->level, c->type, c->size, c->map);
968 static int build_caches(struct cpu_cache_level caches[], u32 size, u32 *cntp)
975 ncpus = sysconf(_SC_NPROCESSORS_CONF);
979 nr = (u32)(ncpus & UINT_MAX);
981 for (cpu = 0; cpu < nr; cpu++) {
982 for (level = 0; level < 10; level++) {
983 struct cpu_cache_level c;
986 err = cpu_cache_level__read(&c, cpu, level);
993 for (i = 0; i < cnt; i++) {
994 if (cpu_cache_level__cmp(&c, &caches[i]))
1001 cpu_cache_level__free(&c);
1003 if (WARN_ONCE(cnt == size, "way too many cpu caches.."))
1012 #define MAX_CACHES 2000
1014 static int write_cache(int fd, struct perf_header *h __maybe_unused,
1015 struct perf_evlist *evlist __maybe_unused)
1017 struct cpu_cache_level caches[MAX_CACHES];
1018 u32 cnt = 0, i, version = 1;
1021 ret = build_caches(caches, MAX_CACHES, &cnt);
1025 qsort(&caches, cnt, sizeof(struct cpu_cache_level), cpu_cache_level__sort);
1027 ret = do_write(fd, &version, sizeof(u32));
1031 ret = do_write(fd, &cnt, sizeof(u32));
1035 for (i = 0; i < cnt; i++) {
1036 struct cpu_cache_level *c = &caches[i];
1039 ret = do_write(fd, &c->v, sizeof(u32)); \
1050 ret = do_write_string(fd, (const char *) c->v); \
1061 for (i = 0; i < cnt; i++)
1062 cpu_cache_level__free(&caches[i]);
1066 static int write_stat(int fd __maybe_unused,
1067 struct perf_header *h __maybe_unused,
1068 struct perf_evlist *evlist __maybe_unused)
1073 static void print_hostname(struct perf_header *ph, int fd __maybe_unused,
1076 fprintf(fp, "# hostname : %s\n", ph->env.hostname);
1079 static void print_osrelease(struct perf_header *ph, int fd __maybe_unused,
1082 fprintf(fp, "# os release : %s\n", ph->env.os_release);
1085 static void print_arch(struct perf_header *ph, int fd __maybe_unused, FILE *fp)
1087 fprintf(fp, "# arch : %s\n", ph->env.arch);
1090 static void print_cpudesc(struct perf_header *ph, int fd __maybe_unused,
1093 fprintf(fp, "# cpudesc : %s\n", ph->env.cpu_desc);
1096 static void print_nrcpus(struct perf_header *ph, int fd __maybe_unused,
1099 fprintf(fp, "# nrcpus online : %u\n", ph->env.nr_cpus_online);
1100 fprintf(fp, "# nrcpus avail : %u\n", ph->env.nr_cpus_avail);
1103 static void print_version(struct perf_header *ph, int fd __maybe_unused,
1106 fprintf(fp, "# perf version : %s\n", ph->env.version);
1109 static void print_cmdline(struct perf_header *ph, int fd __maybe_unused,
1114 nr = ph->env.nr_cmdline;
1116 fprintf(fp, "# cmdline : ");
1118 for (i = 0; i < nr; i++)
1119 fprintf(fp, "%s ", ph->env.cmdline_argv[i]);
1123 static void print_cpu_topology(struct perf_header *ph, int fd __maybe_unused,
1128 int cpu_nr = ph->env.nr_cpus_online;
1130 nr = ph->env.nr_sibling_cores;
1131 str = ph->env.sibling_cores;
1133 for (i = 0; i < nr; i++) {
1134 fprintf(fp, "# sibling cores : %s\n", str);
1135 str += strlen(str) + 1;
1138 nr = ph->env.nr_sibling_threads;
1139 str = ph->env.sibling_threads;
1141 for (i = 0; i < nr; i++) {
1142 fprintf(fp, "# sibling threads : %s\n", str);
1143 str += strlen(str) + 1;
1146 if (ph->env.cpu != NULL) {
1147 for (i = 0; i < cpu_nr; i++)
1148 fprintf(fp, "# CPU %d: Core ID %d, Socket ID %d\n", i,
1149 ph->env.cpu[i].core_id, ph->env.cpu[i].socket_id);
1151 fprintf(fp, "# Core ID and Socket ID information is not available\n");
1154 static void free_event_desc(struct perf_evsel *events)
1156 struct perf_evsel *evsel;
1161 for (evsel = events; evsel->attr.size; evsel++) {
1162 zfree(&evsel->name);
1169 static struct perf_evsel *
1170 read_event_desc(struct perf_header *ph, int fd)
1172 struct perf_evsel *evsel, *events = NULL;
1175 u32 nre, sz, nr, i, j;
1179 /* number of events */
1180 ret = readn(fd, &nre, sizeof(nre));
1181 if (ret != (ssize_t)sizeof(nre))
1185 nre = bswap_32(nre);
1187 ret = readn(fd, &sz, sizeof(sz));
1188 if (ret != (ssize_t)sizeof(sz))
1194 /* buffer to hold on file attr struct */
1199 /* the last event terminates with evsel->attr.size == 0: */
1200 events = calloc(nre + 1, sizeof(*events));
1204 msz = sizeof(evsel->attr);
1208 for (i = 0, evsel = events; i < nre; evsel++, i++) {
1212 * must read entire on-file attr struct to
1213 * sync up with layout.
1215 ret = readn(fd, buf, sz);
1216 if (ret != (ssize_t)sz)
1220 perf_event__attr_swap(buf);
1222 memcpy(&evsel->attr, buf, msz);
1224 ret = readn(fd, &nr, sizeof(nr));
1225 if (ret != (ssize_t)sizeof(nr))
1228 if (ph->needs_swap) {
1230 evsel->needs_swap = true;
1233 evsel->name = do_read_string(fd, ph);
1238 id = calloc(nr, sizeof(*id));
1244 for (j = 0 ; j < nr; j++) {
1245 ret = readn(fd, id, sizeof(*id));
1246 if (ret != (ssize_t)sizeof(*id))
1249 *id = bswap_64(*id);
1257 free_event_desc(events);
1262 static int __desc_attr__fprintf(FILE *fp, const char *name, const char *val,
1263 void *priv __attribute__((unused)))
1265 return fprintf(fp, ", %s = %s", name, val);
1268 static void print_event_desc(struct perf_header *ph, int fd, FILE *fp)
1270 struct perf_evsel *evsel, *events = read_event_desc(ph, fd);
1275 fprintf(fp, "# event desc: not available or unable to read\n");
1279 for (evsel = events; evsel->attr.size; evsel++) {
1280 fprintf(fp, "# event : name = %s, ", evsel->name);
1283 fprintf(fp, ", id = {");
1284 for (j = 0, id = evsel->id; j < evsel->ids; j++, id++) {
1287 fprintf(fp, " %"PRIu64, *id);
1292 perf_event_attr__fprintf(fp, &evsel->attr, __desc_attr__fprintf, NULL);
1297 free_event_desc(events);
1300 static void print_total_mem(struct perf_header *ph, int fd __maybe_unused,
1303 fprintf(fp, "# total memory : %Lu kB\n", ph->env.total_mem);
1306 static void print_numa_topology(struct perf_header *ph, int fd __maybe_unused,
1311 uint64_t mem_total, mem_free;
1314 nr = ph->env.nr_numa_nodes;
1315 str = ph->env.numa_nodes;
1317 for (i = 0; i < nr; i++) {
1319 c = strtoul(str, &tmp, 0);
1324 mem_total = strtoull(str, &tmp, 0);
1329 mem_free = strtoull(str, &tmp, 0);
1333 fprintf(fp, "# node%u meminfo : total = %"PRIu64" kB,"
1334 " free = %"PRIu64" kB\n",
1335 c, mem_total, mem_free);
1338 fprintf(fp, "# node%u cpu list : %s\n", c, str);
1340 str += strlen(str) + 1;
1344 fprintf(fp, "# numa topology : not available\n");
1347 static void print_cpuid(struct perf_header *ph, int fd __maybe_unused, FILE *fp)
1349 fprintf(fp, "# cpuid : %s\n", ph->env.cpuid);
1352 static void print_branch_stack(struct perf_header *ph __maybe_unused,
1353 int fd __maybe_unused, FILE *fp)
1355 fprintf(fp, "# contains samples with branch stack\n");
1358 static void print_auxtrace(struct perf_header *ph __maybe_unused,
1359 int fd __maybe_unused, FILE *fp)
1361 fprintf(fp, "# contains AUX area data (e.g. instruction trace)\n");
1364 static void print_stat(struct perf_header *ph __maybe_unused,
1365 int fd __maybe_unused, FILE *fp)
1367 fprintf(fp, "# contains stat data\n");
1370 static void print_cache(struct perf_header *ph __maybe_unused,
1371 int fd __maybe_unused, FILE *fp __maybe_unused)
1375 fprintf(fp, "# CPU cache info:\n");
1376 for (i = 0; i < ph->env.caches_cnt; i++) {
1378 cpu_cache_level__fprintf(fp, &ph->env.caches[i]);
1382 static void print_pmu_mappings(struct perf_header *ph, int fd __maybe_unused,
1385 const char *delimiter = "# pmu mappings: ";
1390 pmu_num = ph->env.nr_pmu_mappings;
1392 fprintf(fp, "# pmu mappings: not available\n");
1396 str = ph->env.pmu_mappings;
1399 type = strtoul(str, &tmp, 0);
1404 fprintf(fp, "%s%s = %" PRIu32, delimiter, str, type);
1407 str += strlen(str) + 1;
1416 fprintf(fp, "# pmu mappings: unable to read\n");
1419 static void print_group_desc(struct perf_header *ph, int fd __maybe_unused,
1422 struct perf_session *session;
1423 struct perf_evsel *evsel;
1426 session = container_of(ph, struct perf_session, header);
1428 evlist__for_each(session->evlist, evsel) {
1429 if (perf_evsel__is_group_leader(evsel) &&
1430 evsel->nr_members > 1) {
1431 fprintf(fp, "# group: %s{%s", evsel->group_name ?: "",
1432 perf_evsel__name(evsel));
1434 nr = evsel->nr_members - 1;
1436 fprintf(fp, ",%s", perf_evsel__name(evsel));
1444 static int __event_process_build_id(struct build_id_event *bev,
1446 struct perf_session *session)
1449 struct machine *machine;
1452 enum dso_kernel_type dso_type;
1454 machine = perf_session__findnew_machine(session, bev->pid);
1458 cpumode = bev->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
1461 case PERF_RECORD_MISC_KERNEL:
1462 dso_type = DSO_TYPE_KERNEL;
1464 case PERF_RECORD_MISC_GUEST_KERNEL:
1465 dso_type = DSO_TYPE_GUEST_KERNEL;
1467 case PERF_RECORD_MISC_USER:
1468 case PERF_RECORD_MISC_GUEST_USER:
1469 dso_type = DSO_TYPE_USER;
1475 dso = machine__findnew_dso(machine, filename);
1477 char sbuild_id[SBUILD_ID_SIZE];
1479 dso__set_build_id(dso, &bev->build_id);
1481 if (!is_kernel_module(filename, cpumode))
1482 dso->kernel = dso_type;
1484 build_id__sprintf(dso->build_id, sizeof(dso->build_id),
1486 pr_debug("build id event received for %s: %s\n",
1487 dso->long_name, sbuild_id);
1496 static int perf_header__read_build_ids_abi_quirk(struct perf_header *header,
1497 int input, u64 offset, u64 size)
1499 struct perf_session *session = container_of(header, struct perf_session, header);
1501 struct perf_event_header header;
1502 u8 build_id[PERF_ALIGN(BUILD_ID_SIZE, sizeof(u64))];
1505 struct build_id_event bev;
1506 char filename[PATH_MAX];
1507 u64 limit = offset + size;
1509 while (offset < limit) {
1512 if (readn(input, &old_bev, sizeof(old_bev)) != sizeof(old_bev))
1515 if (header->needs_swap)
1516 perf_event_header__bswap(&old_bev.header);
1518 len = old_bev.header.size - sizeof(old_bev);
1519 if (readn(input, filename, len) != len)
1522 bev.header = old_bev.header;
1525 * As the pid is the missing value, we need to fill
1526 * it properly. The header.misc value give us nice hint.
1528 bev.pid = HOST_KERNEL_ID;
1529 if (bev.header.misc == PERF_RECORD_MISC_GUEST_USER ||
1530 bev.header.misc == PERF_RECORD_MISC_GUEST_KERNEL)
1531 bev.pid = DEFAULT_GUEST_KERNEL_ID;
1533 memcpy(bev.build_id, old_bev.build_id, sizeof(bev.build_id));
1534 __event_process_build_id(&bev, filename, session);
1536 offset += bev.header.size;
1542 static int perf_header__read_build_ids(struct perf_header *header,
1543 int input, u64 offset, u64 size)
1545 struct perf_session *session = container_of(header, struct perf_session, header);
1546 struct build_id_event bev;
1547 char filename[PATH_MAX];
1548 u64 limit = offset + size, orig_offset = offset;
1551 while (offset < limit) {
1554 if (readn(input, &bev, sizeof(bev)) != sizeof(bev))
1557 if (header->needs_swap)
1558 perf_event_header__bswap(&bev.header);
1560 len = bev.header.size - sizeof(bev);
1561 if (readn(input, filename, len) != len)
1564 * The a1645ce1 changeset:
1566 * "perf: 'perf kvm' tool for monitoring guest performance from host"
1568 * Added a field to struct build_id_event that broke the file
1571 * Since the kernel build-id is the first entry, process the
1572 * table using the old format if the well known
1573 * '[kernel.kallsyms]' string for the kernel build-id has the
1574 * first 4 characters chopped off (where the pid_t sits).
1576 if (memcmp(filename, "nel.kallsyms]", 13) == 0) {
1577 if (lseek(input, orig_offset, SEEK_SET) == (off_t)-1)
1579 return perf_header__read_build_ids_abi_quirk(header, input, offset, size);
1582 __event_process_build_id(&bev, filename, session);
1584 offset += bev.header.size;
1591 static int process_tracing_data(struct perf_file_section *section __maybe_unused,
1592 struct perf_header *ph __maybe_unused,
1595 ssize_t ret = trace_report(fd, data, false);
1596 return ret < 0 ? -1 : 0;
1599 static int process_build_id(struct perf_file_section *section,
1600 struct perf_header *ph, int fd,
1601 void *data __maybe_unused)
1603 if (perf_header__read_build_ids(ph, fd, section->offset, section->size))
1604 pr_debug("Failed to read buildids, continuing...\n");
1608 static int process_hostname(struct perf_file_section *section __maybe_unused,
1609 struct perf_header *ph, int fd,
1610 void *data __maybe_unused)
1612 ph->env.hostname = do_read_string(fd, ph);
1613 return ph->env.hostname ? 0 : -ENOMEM;
1616 static int process_osrelease(struct perf_file_section *section __maybe_unused,
1617 struct perf_header *ph, int fd,
1618 void *data __maybe_unused)
1620 ph->env.os_release = do_read_string(fd, ph);
1621 return ph->env.os_release ? 0 : -ENOMEM;
1624 static int process_version(struct perf_file_section *section __maybe_unused,
1625 struct perf_header *ph, int fd,
1626 void *data __maybe_unused)
1628 ph->env.version = do_read_string(fd, ph);
1629 return ph->env.version ? 0 : -ENOMEM;
1632 static int process_arch(struct perf_file_section *section __maybe_unused,
1633 struct perf_header *ph, int fd,
1634 void *data __maybe_unused)
1636 ph->env.arch = do_read_string(fd, ph);
1637 return ph->env.arch ? 0 : -ENOMEM;
1640 static int process_nrcpus(struct perf_file_section *section __maybe_unused,
1641 struct perf_header *ph, int fd,
1642 void *data __maybe_unused)
1647 ret = readn(fd, &nr, sizeof(nr));
1648 if (ret != sizeof(nr))
1654 ph->env.nr_cpus_avail = nr;
1656 ret = readn(fd, &nr, sizeof(nr));
1657 if (ret != sizeof(nr))
1663 ph->env.nr_cpus_online = nr;
1667 static int process_cpudesc(struct perf_file_section *section __maybe_unused,
1668 struct perf_header *ph, int fd,
1669 void *data __maybe_unused)
1671 ph->env.cpu_desc = do_read_string(fd, ph);
1672 return ph->env.cpu_desc ? 0 : -ENOMEM;
1675 static int process_cpuid(struct perf_file_section *section __maybe_unused,
1676 struct perf_header *ph, int fd,
1677 void *data __maybe_unused)
1679 ph->env.cpuid = do_read_string(fd, ph);
1680 return ph->env.cpuid ? 0 : -ENOMEM;
1683 static int process_total_mem(struct perf_file_section *section __maybe_unused,
1684 struct perf_header *ph, int fd,
1685 void *data __maybe_unused)
1690 ret = readn(fd, &mem, sizeof(mem));
1691 if (ret != sizeof(mem))
1695 mem = bswap_64(mem);
1697 ph->env.total_mem = mem;
1701 static struct perf_evsel *
1702 perf_evlist__find_by_index(struct perf_evlist *evlist, int idx)
1704 struct perf_evsel *evsel;
1706 evlist__for_each(evlist, evsel) {
1707 if (evsel->idx == idx)
1715 perf_evlist__set_event_name(struct perf_evlist *evlist,
1716 struct perf_evsel *event)
1718 struct perf_evsel *evsel;
1723 evsel = perf_evlist__find_by_index(evlist, event->idx);
1730 evsel->name = strdup(event->name);
1734 process_event_desc(struct perf_file_section *section __maybe_unused,
1735 struct perf_header *header, int fd,
1736 void *data __maybe_unused)
1738 struct perf_session *session;
1739 struct perf_evsel *evsel, *events = read_event_desc(header, fd);
1744 session = container_of(header, struct perf_session, header);
1745 for (evsel = events; evsel->attr.size; evsel++)
1746 perf_evlist__set_event_name(session->evlist, evsel);
1748 free_event_desc(events);
1753 static int process_cmdline(struct perf_file_section *section,
1754 struct perf_header *ph, int fd,
1755 void *data __maybe_unused)
1758 char *str, *cmdline = NULL, **argv = NULL;
1761 ret = readn(fd, &nr, sizeof(nr));
1762 if (ret != sizeof(nr))
1768 ph->env.nr_cmdline = nr;
1770 cmdline = zalloc(section->size + nr + 1);
1774 argv = zalloc(sizeof(char *) * (nr + 1));
1778 for (i = 0; i < nr; i++) {
1779 str = do_read_string(fd, ph);
1783 argv[i] = cmdline + len;
1784 memcpy(argv[i], str, strlen(str) + 1);
1785 len += strlen(str) + 1;
1788 ph->env.cmdline = cmdline;
1789 ph->env.cmdline_argv = (const char **) argv;
1798 static int process_cpu_topology(struct perf_file_section *section,
1799 struct perf_header *ph, int fd,
1800 void *data __maybe_unused)
1806 int cpu_nr = ph->env.nr_cpus_online;
1809 ph->env.cpu = calloc(cpu_nr, sizeof(*ph->env.cpu));
1813 ret = readn(fd, &nr, sizeof(nr));
1814 if (ret != sizeof(nr))
1820 ph->env.nr_sibling_cores = nr;
1821 size += sizeof(u32);
1822 if (strbuf_init(&sb, 128) < 0)
1825 for (i = 0; i < nr; i++) {
1826 str = do_read_string(fd, ph);
1830 /* include a NULL character at the end */
1831 if (strbuf_add(&sb, str, strlen(str) + 1) < 0)
1833 size += string_size(str);
1836 ph->env.sibling_cores = strbuf_detach(&sb, NULL);
1838 ret = readn(fd, &nr, sizeof(nr));
1839 if (ret != sizeof(nr))
1845 ph->env.nr_sibling_threads = nr;
1846 size += sizeof(u32);
1848 for (i = 0; i < nr; i++) {
1849 str = do_read_string(fd, ph);
1853 /* include a NULL character at the end */
1854 if (strbuf_add(&sb, str, strlen(str) + 1) < 0)
1856 size += string_size(str);
1859 ph->env.sibling_threads = strbuf_detach(&sb, NULL);
1862 * The header may be from old perf,
1863 * which doesn't include core id and socket id information.
1865 if (section->size <= size) {
1866 zfree(&ph->env.cpu);
1870 for (i = 0; i < (u32)cpu_nr; i++) {
1871 ret = readn(fd, &nr, sizeof(nr));
1872 if (ret != sizeof(nr))
1878 ph->env.cpu[i].core_id = nr;
1880 ret = readn(fd, &nr, sizeof(nr));
1881 if (ret != sizeof(nr))
1887 if (nr > (u32)cpu_nr) {
1888 pr_debug("socket_id number is too big."
1889 "You may need to upgrade the perf tool.\n");
1893 ph->env.cpu[i].socket_id = nr;
1899 strbuf_release(&sb);
1901 zfree(&ph->env.cpu);
1905 static int process_numa_topology(struct perf_file_section *section __maybe_unused,
1906 struct perf_header *ph, int fd,
1907 void *data __maybe_unused)
1912 uint64_t mem_total, mem_free;
1916 ret = readn(fd, &nr, sizeof(nr));
1917 if (ret != sizeof(nr))
1923 ph->env.nr_numa_nodes = nr;
1924 if (strbuf_init(&sb, 256) < 0)
1927 for (i = 0; i < nr; i++) {
1929 ret = readn(fd, &node, sizeof(node));
1930 if (ret != sizeof(node))
1933 ret = readn(fd, &mem_total, sizeof(u64));
1934 if (ret != sizeof(u64))
1937 ret = readn(fd, &mem_free, sizeof(u64));
1938 if (ret != sizeof(u64))
1941 if (ph->needs_swap) {
1942 node = bswap_32(node);
1943 mem_total = bswap_64(mem_total);
1944 mem_free = bswap_64(mem_free);
1947 if (strbuf_addf(&sb, "%u:%"PRIu64":%"PRIu64":",
1948 node, mem_total, mem_free) < 0)
1951 str = do_read_string(fd, ph);
1955 /* include a NULL character at the end */
1956 if (strbuf_add(&sb, str, strlen(str) + 1) < 0)
1960 ph->env.numa_nodes = strbuf_detach(&sb, NULL);
1964 strbuf_release(&sb);
1968 static int process_pmu_mappings(struct perf_file_section *section __maybe_unused,
1969 struct perf_header *ph, int fd,
1970 void *data __maybe_unused)
1978 ret = readn(fd, &pmu_num, sizeof(pmu_num));
1979 if (ret != sizeof(pmu_num))
1983 pmu_num = bswap_32(pmu_num);
1986 pr_debug("pmu mappings not available\n");
1990 ph->env.nr_pmu_mappings = pmu_num;
1991 if (strbuf_init(&sb, 128) < 0)
1995 if (readn(fd, &type, sizeof(type)) != sizeof(type))
1998 type = bswap_32(type);
2000 name = do_read_string(fd, ph);
2004 if (strbuf_addf(&sb, "%u:%s", type, name) < 0)
2006 /* include a NULL character at the end */
2007 if (strbuf_add(&sb, "", 1) < 0)
2010 if (!strcmp(name, "msr"))
2011 ph->env.msr_pmu_type = type;
2016 ph->env.pmu_mappings = strbuf_detach(&sb, NULL);
2020 strbuf_release(&sb);
2024 static int process_group_desc(struct perf_file_section *section __maybe_unused,
2025 struct perf_header *ph, int fd,
2026 void *data __maybe_unused)
2029 u32 i, nr, nr_groups;
2030 struct perf_session *session;
2031 struct perf_evsel *evsel, *leader = NULL;
2038 if (readn(fd, &nr_groups, sizeof(nr_groups)) != sizeof(nr_groups))
2042 nr_groups = bswap_32(nr_groups);
2044 ph->env.nr_groups = nr_groups;
2046 pr_debug("group desc not available\n");
2050 desc = calloc(nr_groups, sizeof(*desc));
2054 for (i = 0; i < nr_groups; i++) {
2055 desc[i].name = do_read_string(fd, ph);
2059 if (readn(fd, &desc[i].leader_idx, sizeof(u32)) != sizeof(u32))
2062 if (readn(fd, &desc[i].nr_members, sizeof(u32)) != sizeof(u32))
2065 if (ph->needs_swap) {
2066 desc[i].leader_idx = bswap_32(desc[i].leader_idx);
2067 desc[i].nr_members = bswap_32(desc[i].nr_members);
2072 * Rebuild group relationship based on the group_desc
2074 session = container_of(ph, struct perf_session, header);
2075 session->evlist->nr_groups = nr_groups;
2078 evlist__for_each(session->evlist, evsel) {
2079 if (evsel->idx == (int) desc[i].leader_idx) {
2080 evsel->leader = evsel;
2081 /* {anon_group} is a dummy name */
2082 if (strcmp(desc[i].name, "{anon_group}")) {
2083 evsel->group_name = desc[i].name;
2084 desc[i].name = NULL;
2086 evsel->nr_members = desc[i].nr_members;
2088 if (i >= nr_groups || nr > 0) {
2089 pr_debug("invalid group desc\n");
2094 nr = evsel->nr_members - 1;
2097 /* This is a group member */
2098 evsel->leader = leader;
2104 if (i != nr_groups || nr != 0) {
2105 pr_debug("invalid group desc\n");
2111 for (i = 0; i < nr_groups; i++)
2112 zfree(&desc[i].name);
2118 static int process_auxtrace(struct perf_file_section *section,
2119 struct perf_header *ph, int fd,
2120 void *data __maybe_unused)
2122 struct perf_session *session;
2125 session = container_of(ph, struct perf_session, header);
2127 err = auxtrace_index__process(fd, section->size, session,
2130 pr_err("Failed to process auxtrace index\n");
2134 static int process_cache(struct perf_file_section *section __maybe_unused,
2135 struct perf_header *ph __maybe_unused, int fd __maybe_unused,
2136 void *data __maybe_unused)
2138 struct cpu_cache_level *caches;
2139 u32 cnt, i, version;
2141 if (readn(fd, &version, sizeof(version)) != sizeof(version))
2145 version = bswap_32(version);
2150 if (readn(fd, &cnt, sizeof(cnt)) != sizeof(cnt))
2154 cnt = bswap_32(cnt);
2156 caches = zalloc(sizeof(*caches) * cnt);
2160 for (i = 0; i < cnt; i++) {
2161 struct cpu_cache_level c;
2164 if (readn(fd, &c.v, sizeof(u32)) != sizeof(u32))\
2165 goto out_free_caches; \
2166 if (ph->needs_swap) \
2167 c.v = bswap_32(c.v); \
2176 c.v = do_read_string(fd, ph); \
2178 goto out_free_caches;
2188 ph->env.caches = caches;
2189 ph->env.caches_cnt = cnt;
2196 struct feature_ops {
2197 int (*write)(int fd, struct perf_header *h, struct perf_evlist *evlist);
2198 void (*print)(struct perf_header *h, int fd, FILE *fp);
2199 int (*process)(struct perf_file_section *section,
2200 struct perf_header *h, int fd, void *data);
2205 #define FEAT_OPA(n, func) \
2206 [n] = { .name = #n, .write = write_##func, .print = print_##func }
2207 #define FEAT_OPP(n, func) \
2208 [n] = { .name = #n, .write = write_##func, .print = print_##func, \
2209 .process = process_##func }
2210 #define FEAT_OPF(n, func) \
2211 [n] = { .name = #n, .write = write_##func, .print = print_##func, \
2212 .process = process_##func, .full_only = true }
2214 /* feature_ops not implemented: */
2215 #define print_tracing_data NULL
2216 #define print_build_id NULL
2218 static const struct feature_ops feat_ops[HEADER_LAST_FEATURE] = {
2219 FEAT_OPP(HEADER_TRACING_DATA, tracing_data),
2220 FEAT_OPP(HEADER_BUILD_ID, build_id),
2221 FEAT_OPP(HEADER_HOSTNAME, hostname),
2222 FEAT_OPP(HEADER_OSRELEASE, osrelease),
2223 FEAT_OPP(HEADER_VERSION, version),
2224 FEAT_OPP(HEADER_ARCH, arch),
2225 FEAT_OPP(HEADER_NRCPUS, nrcpus),
2226 FEAT_OPP(HEADER_CPUDESC, cpudesc),
2227 FEAT_OPP(HEADER_CPUID, cpuid),
2228 FEAT_OPP(HEADER_TOTAL_MEM, total_mem),
2229 FEAT_OPP(HEADER_EVENT_DESC, event_desc),
2230 FEAT_OPP(HEADER_CMDLINE, cmdline),
2231 FEAT_OPF(HEADER_CPU_TOPOLOGY, cpu_topology),
2232 FEAT_OPF(HEADER_NUMA_TOPOLOGY, numa_topology),
2233 FEAT_OPA(HEADER_BRANCH_STACK, branch_stack),
2234 FEAT_OPP(HEADER_PMU_MAPPINGS, pmu_mappings),
2235 FEAT_OPP(HEADER_GROUP_DESC, group_desc),
2236 FEAT_OPP(HEADER_AUXTRACE, auxtrace),
2237 FEAT_OPA(HEADER_STAT, stat),
2238 FEAT_OPF(HEADER_CACHE, cache),
2241 struct header_print_data {
2243 bool full; /* extended list of headers */
2246 static int perf_file_section__fprintf_info(struct perf_file_section *section,
2247 struct perf_header *ph,
2248 int feat, int fd, void *data)
2250 struct header_print_data *hd = data;
2252 if (lseek(fd, section->offset, SEEK_SET) == (off_t)-1) {
2253 pr_debug("Failed to lseek to %" PRIu64 " offset for feature "
2254 "%d, continuing...\n", section->offset, feat);
2257 if (feat >= HEADER_LAST_FEATURE) {
2258 pr_warning("unknown feature %d\n", feat);
2261 if (!feat_ops[feat].print)
2264 if (!feat_ops[feat].full_only || hd->full)
2265 feat_ops[feat].print(ph, fd, hd->fp);
2267 fprintf(hd->fp, "# %s info available, use -I to display\n",
2268 feat_ops[feat].name);
2273 int perf_header__fprintf_info(struct perf_session *session, FILE *fp, bool full)
2275 struct header_print_data hd;
2276 struct perf_header *header = &session->header;
2277 int fd = perf_data_file__fd(session->file);
2281 perf_header__process_sections(header, fd, &hd,
2282 perf_file_section__fprintf_info);
2286 static int do_write_feat(int fd, struct perf_header *h, int type,
2287 struct perf_file_section **p,
2288 struct perf_evlist *evlist)
2293 if (perf_header__has_feat(h, type)) {
2294 if (!feat_ops[type].write)
2297 (*p)->offset = lseek(fd, 0, SEEK_CUR);
2299 err = feat_ops[type].write(fd, h, evlist);
2301 pr_debug("failed to write feature %d\n", type);
2303 /* undo anything written */
2304 lseek(fd, (*p)->offset, SEEK_SET);
2308 (*p)->size = lseek(fd, 0, SEEK_CUR) - (*p)->offset;
2314 static int perf_header__adds_write(struct perf_header *header,
2315 struct perf_evlist *evlist, int fd)
2318 struct perf_file_section *feat_sec, *p;
2324 nr_sections = bitmap_weight(header->adds_features, HEADER_FEAT_BITS);
2328 feat_sec = p = calloc(nr_sections, sizeof(*feat_sec));
2329 if (feat_sec == NULL)
2332 sec_size = sizeof(*feat_sec) * nr_sections;
2334 sec_start = header->feat_offset;
2335 lseek(fd, sec_start + sec_size, SEEK_SET);
2337 for_each_set_bit(feat, header->adds_features, HEADER_FEAT_BITS) {
2338 if (do_write_feat(fd, header, feat, &p, evlist))
2339 perf_header__clear_feat(header, feat);
2342 lseek(fd, sec_start, SEEK_SET);
2344 * may write more than needed due to dropped feature, but
2345 * this is okay, reader will skip the mising entries
2347 err = do_write(fd, feat_sec, sec_size);
2349 pr_debug("failed to write feature section\n");
2354 int perf_header__write_pipe(int fd)
2356 struct perf_pipe_file_header f_header;
2359 f_header = (struct perf_pipe_file_header){
2360 .magic = PERF_MAGIC,
2361 .size = sizeof(f_header),
2364 err = do_write(fd, &f_header, sizeof(f_header));
2366 pr_debug("failed to write perf pipe header\n");
2373 int perf_session__write_header(struct perf_session *session,
2374 struct perf_evlist *evlist,
2375 int fd, bool at_exit)
2377 struct perf_file_header f_header;
2378 struct perf_file_attr f_attr;
2379 struct perf_header *header = &session->header;
2380 struct perf_evsel *evsel;
2384 lseek(fd, sizeof(f_header), SEEK_SET);
2386 evlist__for_each(session->evlist, evsel) {
2387 evsel->id_offset = lseek(fd, 0, SEEK_CUR);
2388 err = do_write(fd, evsel->id, evsel->ids * sizeof(u64));
2390 pr_debug("failed to write perf header\n");
2395 attr_offset = lseek(fd, 0, SEEK_CUR);
2397 evlist__for_each(evlist, evsel) {
2398 f_attr = (struct perf_file_attr){
2399 .attr = evsel->attr,
2401 .offset = evsel->id_offset,
2402 .size = evsel->ids * sizeof(u64),
2405 err = do_write(fd, &f_attr, sizeof(f_attr));
2407 pr_debug("failed to write perf header attribute\n");
2412 if (!header->data_offset)
2413 header->data_offset = lseek(fd, 0, SEEK_CUR);
2414 header->feat_offset = header->data_offset + header->data_size;
2417 err = perf_header__adds_write(header, evlist, fd);
2422 f_header = (struct perf_file_header){
2423 .magic = PERF_MAGIC,
2424 .size = sizeof(f_header),
2425 .attr_size = sizeof(f_attr),
2427 .offset = attr_offset,
2428 .size = evlist->nr_entries * sizeof(f_attr),
2431 .offset = header->data_offset,
2432 .size = header->data_size,
2434 /* event_types is ignored, store zeros */
2437 memcpy(&f_header.adds_features, &header->adds_features, sizeof(header->adds_features));
2439 lseek(fd, 0, SEEK_SET);
2440 err = do_write(fd, &f_header, sizeof(f_header));
2442 pr_debug("failed to write perf header\n");
2445 lseek(fd, header->data_offset + header->data_size, SEEK_SET);
2450 static int perf_header__getbuffer64(struct perf_header *header,
2451 int fd, void *buf, size_t size)
2453 if (readn(fd, buf, size) <= 0)
2456 if (header->needs_swap)
2457 mem_bswap_64(buf, size);
2462 int perf_header__process_sections(struct perf_header *header, int fd,
2464 int (*process)(struct perf_file_section *section,
2465 struct perf_header *ph,
2466 int feat, int fd, void *data))
2468 struct perf_file_section *feat_sec, *sec;
2474 nr_sections = bitmap_weight(header->adds_features, HEADER_FEAT_BITS);
2478 feat_sec = sec = calloc(nr_sections, sizeof(*feat_sec));
2482 sec_size = sizeof(*feat_sec) * nr_sections;
2484 lseek(fd, header->feat_offset, SEEK_SET);
2486 err = perf_header__getbuffer64(header, fd, feat_sec, sec_size);
2490 for_each_set_bit(feat, header->adds_features, HEADER_LAST_FEATURE) {
2491 err = process(sec++, header, feat, fd, data);
2501 static const int attr_file_abi_sizes[] = {
2502 [0] = PERF_ATTR_SIZE_VER0,
2503 [1] = PERF_ATTR_SIZE_VER1,
2504 [2] = PERF_ATTR_SIZE_VER2,
2505 [3] = PERF_ATTR_SIZE_VER3,
2506 [4] = PERF_ATTR_SIZE_VER4,
2511 * In the legacy file format, the magic number is not used to encode endianness.
2512 * hdr_sz was used to encode endianness. But given that hdr_sz can vary based
2513 * on ABI revisions, we need to try all combinations for all endianness to
2514 * detect the endianness.
2516 static int try_all_file_abis(uint64_t hdr_sz, struct perf_header *ph)
2518 uint64_t ref_size, attr_size;
2521 for (i = 0 ; attr_file_abi_sizes[i]; i++) {
2522 ref_size = attr_file_abi_sizes[i]
2523 + sizeof(struct perf_file_section);
2524 if (hdr_sz != ref_size) {
2525 attr_size = bswap_64(hdr_sz);
2526 if (attr_size != ref_size)
2529 ph->needs_swap = true;
2531 pr_debug("ABI%d perf.data file detected, need_swap=%d\n",
2536 /* could not determine endianness */
2540 #define PERF_PIPE_HDR_VER0 16
2542 static const size_t attr_pipe_abi_sizes[] = {
2543 [0] = PERF_PIPE_HDR_VER0,
2548 * In the legacy pipe format, there is an implicit assumption that endiannesss
2549 * between host recording the samples, and host parsing the samples is the
2550 * same. This is not always the case given that the pipe output may always be
2551 * redirected into a file and analyzed on a different machine with possibly a
2552 * different endianness and perf_event ABI revsions in the perf tool itself.
2554 static int try_all_pipe_abis(uint64_t hdr_sz, struct perf_header *ph)
2559 for (i = 0 ; attr_pipe_abi_sizes[i]; i++) {
2560 if (hdr_sz != attr_pipe_abi_sizes[i]) {
2561 attr_size = bswap_64(hdr_sz);
2562 if (attr_size != hdr_sz)
2565 ph->needs_swap = true;
2567 pr_debug("Pipe ABI%d perf.data file detected\n", i);
2573 bool is_perf_magic(u64 magic)
2575 if (!memcmp(&magic, __perf_magic1, sizeof(magic))
2576 || magic == __perf_magic2
2577 || magic == __perf_magic2_sw)
2583 static int check_magic_endian(u64 magic, uint64_t hdr_sz,
2584 bool is_pipe, struct perf_header *ph)
2588 /* check for legacy format */
2589 ret = memcmp(&magic, __perf_magic1, sizeof(magic));
2591 ph->version = PERF_HEADER_VERSION_1;
2592 pr_debug("legacy perf.data format\n");
2594 return try_all_pipe_abis(hdr_sz, ph);
2596 return try_all_file_abis(hdr_sz, ph);
2599 * the new magic number serves two purposes:
2600 * - unique number to identify actual perf.data files
2601 * - encode endianness of file
2603 ph->version = PERF_HEADER_VERSION_2;
2605 /* check magic number with one endianness */
2606 if (magic == __perf_magic2)
2609 /* check magic number with opposite endianness */
2610 if (magic != __perf_magic2_sw)
2613 ph->needs_swap = true;
2618 int perf_file_header__read(struct perf_file_header *header,
2619 struct perf_header *ph, int fd)
2623 lseek(fd, 0, SEEK_SET);
2625 ret = readn(fd, header, sizeof(*header));
2629 if (check_magic_endian(header->magic,
2630 header->attr_size, false, ph) < 0) {
2631 pr_debug("magic/endian check failed\n");
2635 if (ph->needs_swap) {
2636 mem_bswap_64(header, offsetof(struct perf_file_header,
2640 if (header->size != sizeof(*header)) {
2641 /* Support the previous format */
2642 if (header->size == offsetof(typeof(*header), adds_features))
2643 bitmap_zero(header->adds_features, HEADER_FEAT_BITS);
2646 } else if (ph->needs_swap) {
2648 * feature bitmap is declared as an array of unsigned longs --
2649 * not good since its size can differ between the host that
2650 * generated the data file and the host analyzing the file.
2652 * We need to handle endianness, but we don't know the size of
2653 * the unsigned long where the file was generated. Take a best
2654 * guess at determining it: try 64-bit swap first (ie., file
2655 * created on a 64-bit host), and check if the hostname feature
2656 * bit is set (this feature bit is forced on as of fbe96f2).
2657 * If the bit is not, undo the 64-bit swap and try a 32-bit
2658 * swap. If the hostname bit is still not set (e.g., older data
2659 * file), punt and fallback to the original behavior --
2660 * clearing all feature bits and setting buildid.
2662 mem_bswap_64(&header->adds_features,
2663 BITS_TO_U64(HEADER_FEAT_BITS));
2665 if (!test_bit(HEADER_HOSTNAME, header->adds_features)) {
2667 mem_bswap_64(&header->adds_features,
2668 BITS_TO_U64(HEADER_FEAT_BITS));
2671 mem_bswap_32(&header->adds_features,
2672 BITS_TO_U32(HEADER_FEAT_BITS));
2675 if (!test_bit(HEADER_HOSTNAME, header->adds_features)) {
2676 bitmap_zero(header->adds_features, HEADER_FEAT_BITS);
2677 set_bit(HEADER_BUILD_ID, header->adds_features);
2681 memcpy(&ph->adds_features, &header->adds_features,
2682 sizeof(ph->adds_features));
2684 ph->data_offset = header->data.offset;
2685 ph->data_size = header->data.size;
2686 ph->feat_offset = header->data.offset + header->data.size;
2690 static int perf_file_section__process(struct perf_file_section *section,
2691 struct perf_header *ph,
2692 int feat, int fd, void *data)
2694 if (lseek(fd, section->offset, SEEK_SET) == (off_t)-1) {
2695 pr_debug("Failed to lseek to %" PRIu64 " offset for feature "
2696 "%d, continuing...\n", section->offset, feat);
2700 if (feat >= HEADER_LAST_FEATURE) {
2701 pr_debug("unknown feature %d, continuing...\n", feat);
2705 if (!feat_ops[feat].process)
2708 return feat_ops[feat].process(section, ph, fd, data);
2711 static int perf_file_header__read_pipe(struct perf_pipe_file_header *header,
2712 struct perf_header *ph, int fd,
2717 ret = readn(fd, header, sizeof(*header));
2721 if (check_magic_endian(header->magic, header->size, true, ph) < 0) {
2722 pr_debug("endian/magic failed\n");
2727 header->size = bswap_64(header->size);
2729 if (repipe && do_write(STDOUT_FILENO, header, sizeof(*header)) < 0)
2735 static int perf_header__read_pipe(struct perf_session *session)
2737 struct perf_header *header = &session->header;
2738 struct perf_pipe_file_header f_header;
2740 if (perf_file_header__read_pipe(&f_header, header,
2741 perf_data_file__fd(session->file),
2742 session->repipe) < 0) {
2743 pr_debug("incompatible file format\n");
2750 static int read_attr(int fd, struct perf_header *ph,
2751 struct perf_file_attr *f_attr)
2753 struct perf_event_attr *attr = &f_attr->attr;
2755 size_t our_sz = sizeof(f_attr->attr);
2758 memset(f_attr, 0, sizeof(*f_attr));
2760 /* read minimal guaranteed structure */
2761 ret = readn(fd, attr, PERF_ATTR_SIZE_VER0);
2763 pr_debug("cannot read %d bytes of header attr\n",
2764 PERF_ATTR_SIZE_VER0);
2768 /* on file perf_event_attr size */
2776 sz = PERF_ATTR_SIZE_VER0;
2777 } else if (sz > our_sz) {
2778 pr_debug("file uses a more recent and unsupported ABI"
2779 " (%zu bytes extra)\n", sz - our_sz);
2782 /* what we have not yet read and that we know about */
2783 left = sz - PERF_ATTR_SIZE_VER0;
2786 ptr += PERF_ATTR_SIZE_VER0;
2788 ret = readn(fd, ptr, left);
2790 /* read perf_file_section, ids are read in caller */
2791 ret = readn(fd, &f_attr->ids, sizeof(f_attr->ids));
2793 return ret <= 0 ? -1 : 0;
2796 static int perf_evsel__prepare_tracepoint_event(struct perf_evsel *evsel,
2797 struct pevent *pevent)
2799 struct event_format *event;
2802 /* already prepared */
2803 if (evsel->tp_format)
2806 if (pevent == NULL) {
2807 pr_debug("broken or missing trace data\n");
2811 event = pevent_find_event(pevent, evsel->attr.config);
2816 snprintf(bf, sizeof(bf), "%s:%s", event->system, event->name);
2817 evsel->name = strdup(bf);
2818 if (evsel->name == NULL)
2822 evsel->tp_format = event;
2826 static int perf_evlist__prepare_tracepoint_events(struct perf_evlist *evlist,
2827 struct pevent *pevent)
2829 struct perf_evsel *pos;
2831 evlist__for_each(evlist, pos) {
2832 if (pos->attr.type == PERF_TYPE_TRACEPOINT &&
2833 perf_evsel__prepare_tracepoint_event(pos, pevent))
2840 int perf_session__read_header(struct perf_session *session)
2842 struct perf_data_file *file = session->file;
2843 struct perf_header *header = &session->header;
2844 struct perf_file_header f_header;
2845 struct perf_file_attr f_attr;
2847 int nr_attrs, nr_ids, i, j;
2848 int fd = perf_data_file__fd(file);
2850 session->evlist = perf_evlist__new();
2851 if (session->evlist == NULL)
2854 session->evlist->env = &header->env;
2855 session->machines.host.env = &header->env;
2856 if (perf_data_file__is_pipe(file))
2857 return perf_header__read_pipe(session);
2859 if (perf_file_header__read(&f_header, header, fd) < 0)
2863 * Sanity check that perf.data was written cleanly; data size is
2864 * initialized to 0 and updated only if the on_exit function is run.
2865 * If data size is still 0 then the file contains only partial
2866 * information. Just warn user and process it as much as it can.
2868 if (f_header.data.size == 0) {
2869 pr_warning("WARNING: The %s file's data size field is 0 which is unexpected.\n"
2870 "Was the 'perf record' command properly terminated?\n",
2874 nr_attrs = f_header.attrs.size / f_header.attr_size;
2875 lseek(fd, f_header.attrs.offset, SEEK_SET);
2877 for (i = 0; i < nr_attrs; i++) {
2878 struct perf_evsel *evsel;
2881 if (read_attr(fd, header, &f_attr) < 0)
2884 if (header->needs_swap) {
2885 f_attr.ids.size = bswap_64(f_attr.ids.size);
2886 f_attr.ids.offset = bswap_64(f_attr.ids.offset);
2887 perf_event__attr_swap(&f_attr.attr);
2890 tmp = lseek(fd, 0, SEEK_CUR);
2891 evsel = perf_evsel__new(&f_attr.attr);
2894 goto out_delete_evlist;
2896 evsel->needs_swap = header->needs_swap;
2898 * Do it before so that if perf_evsel__alloc_id fails, this
2899 * entry gets purged too at perf_evlist__delete().
2901 perf_evlist__add(session->evlist, evsel);
2903 nr_ids = f_attr.ids.size / sizeof(u64);
2905 * We don't have the cpu and thread maps on the header, so
2906 * for allocating the perf_sample_id table we fake 1 cpu and
2907 * hattr->ids threads.
2909 if (perf_evsel__alloc_id(evsel, 1, nr_ids))
2910 goto out_delete_evlist;
2912 lseek(fd, f_attr.ids.offset, SEEK_SET);
2914 for (j = 0; j < nr_ids; j++) {
2915 if (perf_header__getbuffer64(header, fd, &f_id, sizeof(f_id)))
2918 perf_evlist__id_add(session->evlist, evsel, 0, j, f_id);
2921 lseek(fd, tmp, SEEK_SET);
2924 symbol_conf.nr_events = nr_attrs;
2926 perf_header__process_sections(header, fd, &session->tevent,
2927 perf_file_section__process);
2929 if (perf_evlist__prepare_tracepoint_events(session->evlist,
2930 session->tevent.pevent))
2931 goto out_delete_evlist;
2938 perf_evlist__delete(session->evlist);
2939 session->evlist = NULL;
2943 int perf_event__synthesize_attr(struct perf_tool *tool,
2944 struct perf_event_attr *attr, u32 ids, u64 *id,
2945 perf_event__handler_t process)
2947 union perf_event *ev;
2951 size = sizeof(struct perf_event_attr);
2952 size = PERF_ALIGN(size, sizeof(u64));
2953 size += sizeof(struct perf_event_header);
2954 size += ids * sizeof(u64);
2961 ev->attr.attr = *attr;
2962 memcpy(ev->attr.id, id, ids * sizeof(u64));
2964 ev->attr.header.type = PERF_RECORD_HEADER_ATTR;
2965 ev->attr.header.size = (u16)size;
2967 if (ev->attr.header.size == size)
2968 err = process(tool, ev, NULL, NULL);
2977 static struct event_update_event *
2978 event_update_event__new(size_t size, u64 type, u64 id)
2980 struct event_update_event *ev;
2982 size += sizeof(*ev);
2983 size = PERF_ALIGN(size, sizeof(u64));
2987 ev->header.type = PERF_RECORD_EVENT_UPDATE;
2988 ev->header.size = (u16)size;
2996 perf_event__synthesize_event_update_unit(struct perf_tool *tool,
2997 struct perf_evsel *evsel,
2998 perf_event__handler_t process)
3000 struct event_update_event *ev;
3001 size_t size = strlen(evsel->unit);
3004 ev = event_update_event__new(size + 1, PERF_EVENT_UPDATE__UNIT, evsel->id[0]);
3008 strncpy(ev->data, evsel->unit, size);
3009 err = process(tool, (union perf_event *)ev, NULL, NULL);
3015 perf_event__synthesize_event_update_scale(struct perf_tool *tool,
3016 struct perf_evsel *evsel,
3017 perf_event__handler_t process)
3019 struct event_update_event *ev;
3020 struct event_update_event_scale *ev_data;
3023 ev = event_update_event__new(sizeof(*ev_data), PERF_EVENT_UPDATE__SCALE, evsel->id[0]);
3027 ev_data = (struct event_update_event_scale *) ev->data;
3028 ev_data->scale = evsel->scale;
3029 err = process(tool, (union perf_event*) ev, NULL, NULL);
3035 perf_event__synthesize_event_update_name(struct perf_tool *tool,
3036 struct perf_evsel *evsel,
3037 perf_event__handler_t process)
3039 struct event_update_event *ev;
3040 size_t len = strlen(evsel->name);
3043 ev = event_update_event__new(len + 1, PERF_EVENT_UPDATE__NAME, evsel->id[0]);
3047 strncpy(ev->data, evsel->name, len);
3048 err = process(tool, (union perf_event*) ev, NULL, NULL);
3054 perf_event__synthesize_event_update_cpus(struct perf_tool *tool,
3055 struct perf_evsel *evsel,
3056 perf_event__handler_t process)
3058 size_t size = sizeof(struct event_update_event);
3059 struct event_update_event *ev;
3063 if (!evsel->own_cpus)
3066 ev = cpu_map_data__alloc(evsel->own_cpus, &size, &type, &max);
3070 ev->header.type = PERF_RECORD_EVENT_UPDATE;
3071 ev->header.size = (u16)size;
3072 ev->type = PERF_EVENT_UPDATE__CPUS;
3073 ev->id = evsel->id[0];
3075 cpu_map_data__synthesize((struct cpu_map_data *) ev->data,
3079 err = process(tool, (union perf_event*) ev, NULL, NULL);
3084 size_t perf_event__fprintf_event_update(union perf_event *event, FILE *fp)
3086 struct event_update_event *ev = &event->event_update;
3087 struct event_update_event_scale *ev_scale;
3088 struct event_update_event_cpus *ev_cpus;
3089 struct cpu_map *map;
3092 ret = fprintf(fp, "\n... id: %" PRIu64 "\n", ev->id);
3095 case PERF_EVENT_UPDATE__SCALE:
3096 ev_scale = (struct event_update_event_scale *) ev->data;
3097 ret += fprintf(fp, "... scale: %f\n", ev_scale->scale);
3099 case PERF_EVENT_UPDATE__UNIT:
3100 ret += fprintf(fp, "... unit: %s\n", ev->data);
3102 case PERF_EVENT_UPDATE__NAME:
3103 ret += fprintf(fp, "... name: %s\n", ev->data);
3105 case PERF_EVENT_UPDATE__CPUS:
3106 ev_cpus = (struct event_update_event_cpus *) ev->data;
3107 ret += fprintf(fp, "... ");
3109 map = cpu_map__new_data(&ev_cpus->cpus);
3111 ret += cpu_map__fprintf(map, fp);
3113 ret += fprintf(fp, "failed to get cpus\n");
3116 ret += fprintf(fp, "... unknown type\n");
3123 int perf_event__synthesize_attrs(struct perf_tool *tool,
3124 struct perf_session *session,
3125 perf_event__handler_t process)
3127 struct perf_evsel *evsel;
3130 evlist__for_each(session->evlist, evsel) {
3131 err = perf_event__synthesize_attr(tool, &evsel->attr, evsel->ids,
3132 evsel->id, process);
3134 pr_debug("failed to create perf header attribute\n");
3142 int perf_event__process_attr(struct perf_tool *tool __maybe_unused,
3143 union perf_event *event,
3144 struct perf_evlist **pevlist)
3147 struct perf_evsel *evsel;
3148 struct perf_evlist *evlist = *pevlist;
3150 if (evlist == NULL) {
3151 *pevlist = evlist = perf_evlist__new();
3156 evsel = perf_evsel__new(&event->attr.attr);
3160 perf_evlist__add(evlist, evsel);
3162 ids = event->header.size;
3163 ids -= (void *)&event->attr.id - (void *)event;
3164 n_ids = ids / sizeof(u64);
3166 * We don't have the cpu and thread maps on the header, so
3167 * for allocating the perf_sample_id table we fake 1 cpu and
3168 * hattr->ids threads.
3170 if (perf_evsel__alloc_id(evsel, 1, n_ids))
3173 for (i = 0; i < n_ids; i++) {
3174 perf_evlist__id_add(evlist, evsel, 0, i, event->attr.id[i]);
3177 symbol_conf.nr_events = evlist->nr_entries;
3182 int perf_event__process_event_update(struct perf_tool *tool __maybe_unused,
3183 union perf_event *event,
3184 struct perf_evlist **pevlist)
3186 struct event_update_event *ev = &event->event_update;
3187 struct event_update_event_scale *ev_scale;
3188 struct event_update_event_cpus *ev_cpus;
3189 struct perf_evlist *evlist;
3190 struct perf_evsel *evsel;
3191 struct cpu_map *map;
3193 if (!pevlist || *pevlist == NULL)
3198 evsel = perf_evlist__id2evsel(evlist, ev->id);
3203 case PERF_EVENT_UPDATE__UNIT:
3204 evsel->unit = strdup(ev->data);
3206 case PERF_EVENT_UPDATE__NAME:
3207 evsel->name = strdup(ev->data);
3209 case PERF_EVENT_UPDATE__SCALE:
3210 ev_scale = (struct event_update_event_scale *) ev->data;
3211 evsel->scale = ev_scale->scale;
3212 case PERF_EVENT_UPDATE__CPUS:
3213 ev_cpus = (struct event_update_event_cpus *) ev->data;
3215 map = cpu_map__new_data(&ev_cpus->cpus);
3217 evsel->own_cpus = map;
3219 pr_err("failed to get event_update cpus\n");
3227 int perf_event__synthesize_tracing_data(struct perf_tool *tool, int fd,
3228 struct perf_evlist *evlist,
3229 perf_event__handler_t process)
3231 union perf_event ev;
3232 struct tracing_data *tdata;
3233 ssize_t size = 0, aligned_size = 0, padding;
3234 int err __maybe_unused = 0;
3237 * We are going to store the size of the data followed
3238 * by the data contents. Since the fd descriptor is a pipe,
3239 * we cannot seek back to store the size of the data once
3240 * we know it. Instead we:
3242 * - write the tracing data to the temp file
3243 * - get/write the data size to pipe
3244 * - write the tracing data from the temp file
3247 tdata = tracing_data_get(&evlist->entries, fd, true);
3251 memset(&ev, 0, sizeof(ev));
3253 ev.tracing_data.header.type = PERF_RECORD_HEADER_TRACING_DATA;
3255 aligned_size = PERF_ALIGN(size, sizeof(u64));
3256 padding = aligned_size - size;
3257 ev.tracing_data.header.size = sizeof(ev.tracing_data);
3258 ev.tracing_data.size = aligned_size;
3260 process(tool, &ev, NULL, NULL);
3263 * The put function will copy all the tracing data
3264 * stored in temp file to the pipe.
3266 tracing_data_put(tdata);
3268 write_padded(fd, NULL, 0, padding);
3270 return aligned_size;
3273 int perf_event__process_tracing_data(struct perf_tool *tool __maybe_unused,
3274 union perf_event *event,
3275 struct perf_session *session)
3277 ssize_t size_read, padding, size = event->tracing_data.size;
3278 int fd = perf_data_file__fd(session->file);
3279 off_t offset = lseek(fd, 0, SEEK_CUR);
3282 /* setup for reading amidst mmap */
3283 lseek(fd, offset + sizeof(struct tracing_data_event),
3286 size_read = trace_report(fd, &session->tevent,
3288 padding = PERF_ALIGN(size_read, sizeof(u64)) - size_read;
3290 if (readn(fd, buf, padding) < 0) {
3291 pr_err("%s: reading input file", __func__);
3294 if (session->repipe) {
3295 int retw = write(STDOUT_FILENO, buf, padding);
3296 if (retw <= 0 || retw != padding) {
3297 pr_err("%s: repiping tracing data padding", __func__);
3302 if (size_read + padding != size) {
3303 pr_err("%s: tracing data size mismatch", __func__);
3307 perf_evlist__prepare_tracepoint_events(session->evlist,
3308 session->tevent.pevent);
3310 return size_read + padding;
3313 int perf_event__synthesize_build_id(struct perf_tool *tool,
3314 struct dso *pos, u16 misc,
3315 perf_event__handler_t process,
3316 struct machine *machine)
3318 union perf_event ev;
3325 memset(&ev, 0, sizeof(ev));
3327 len = pos->long_name_len + 1;
3328 len = PERF_ALIGN(len, NAME_ALIGN);
3329 memcpy(&ev.build_id.build_id, pos->build_id, sizeof(pos->build_id));
3330 ev.build_id.header.type = PERF_RECORD_HEADER_BUILD_ID;
3331 ev.build_id.header.misc = misc;
3332 ev.build_id.pid = machine->pid;
3333 ev.build_id.header.size = sizeof(ev.build_id) + len;
3334 memcpy(&ev.build_id.filename, pos->long_name, pos->long_name_len);
3336 err = process(tool, &ev, NULL, machine);
3341 int perf_event__process_build_id(struct perf_tool *tool __maybe_unused,
3342 union perf_event *event,
3343 struct perf_session *session)
3345 __event_process_build_id(&event->build_id,
3346 event->build_id.filename,