11 #include <linux/list.h>
12 #include <linux/kernel.h>
13 #include <linux/bitops.h>
15 #include <sys/types.h>
16 #include <sys/utsname.h>
24 #include "trace-event.h"
34 #include <api/fs/fs.h>
37 #include "sane_ctype.h"
41 * must be a numerical value to let the endianness
42 * determine the memory layout. That way we are able
43 * to detect endianness when reading the perf.data file
46 * we check for legacy (PERFFILE) format.
48 static const char *__perf_magic1 = "PERFFILE";
49 static const u64 __perf_magic2 = 0x32454c4946524550ULL;
50 static const u64 __perf_magic2_sw = 0x50455246494c4532ULL;
52 #define PERF_MAGIC __perf_magic2
54 const char perf_version_string[] = PERF_VERSION;
56 struct perf_file_attr {
57 struct perf_event_attr attr;
58 struct perf_file_section ids;
61 void perf_header__set_feat(struct perf_header *header, int feat)
63 set_bit(feat, header->adds_features);
66 void perf_header__clear_feat(struct perf_header *header, int feat)
68 clear_bit(feat, header->adds_features);
71 bool perf_header__has_feat(const struct perf_header *header, int feat)
73 return test_bit(feat, header->adds_features);
76 static int do_write(int fd, const void *buf, size_t size)
79 int ret = write(fd, buf, size);
91 int write_padded(int fd, const void *bf, size_t count, size_t count_aligned)
93 static const char zero_buf[NAME_ALIGN];
94 int err = do_write(fd, bf, count);
97 err = do_write(fd, zero_buf, count_aligned - count);
102 #define string_size(str) \
103 (PERF_ALIGN((strlen(str) + 1), NAME_ALIGN) + sizeof(u32))
105 static int do_write_string(int fd, const char *str)
110 olen = strlen(str) + 1;
111 len = PERF_ALIGN(olen, NAME_ALIGN);
113 /* write len, incl. \0 */
114 ret = do_write(fd, &len, sizeof(len));
118 return write_padded(fd, str, olen, len);
121 static char *do_read_string(int fd, struct perf_header *ph)
127 sz = readn(fd, &len, sizeof(len));
128 if (sz < (ssize_t)sizeof(len))
138 ret = readn(fd, buf, len);
139 if (ret == (ssize_t)len) {
141 * strings are padded by zeroes
142 * thus the actual strlen of buf
143 * may be less than len
152 static int write_tracing_data(int fd, struct perf_header *h __maybe_unused,
153 struct perf_evlist *evlist)
155 return read_tracing_data(fd, &evlist->entries);
159 static int write_build_id(int fd, struct perf_header *h,
160 struct perf_evlist *evlist __maybe_unused)
162 struct perf_session *session;
165 session = container_of(h, struct perf_session, header);
167 if (!perf_session__read_build_ids(session, true))
170 err = perf_session__write_buildid_table(session, fd);
172 pr_debug("failed to write buildid table\n");
175 perf_session__cache_build_ids(session);
180 static int write_hostname(int fd, struct perf_header *h __maybe_unused,
181 struct perf_evlist *evlist __maybe_unused)
190 return do_write_string(fd, uts.nodename);
193 static int write_osrelease(int fd, struct perf_header *h __maybe_unused,
194 struct perf_evlist *evlist __maybe_unused)
203 return do_write_string(fd, uts.release);
206 static int write_arch(int fd, struct perf_header *h __maybe_unused,
207 struct perf_evlist *evlist __maybe_unused)
216 return do_write_string(fd, uts.machine);
219 static int write_version(int fd, struct perf_header *h __maybe_unused,
220 struct perf_evlist *evlist __maybe_unused)
222 return do_write_string(fd, perf_version_string);
225 static int __write_cpudesc(int fd, const char *cpuinfo_proc)
230 const char *search = cpuinfo_proc;
237 file = fopen("/proc/cpuinfo", "r");
241 while (getline(&buf, &len, file) > 0) {
242 ret = strncmp(buf, search, strlen(search));
254 p = strchr(buf, ':');
255 if (p && *(p+1) == ' ' && *(p+2))
261 /* squash extra space characters (branding string) */
268 while (*q && isspace(*q))
271 while ((*r++ = *q++));
275 ret = do_write_string(fd, s);
282 static int write_cpudesc(int fd, struct perf_header *h __maybe_unused,
283 struct perf_evlist *evlist __maybe_unused)
286 #define CPUINFO_PROC {"model name", }
288 const char *cpuinfo_procs[] = CPUINFO_PROC;
291 for (i = 0; i < ARRAY_SIZE(cpuinfo_procs); i++) {
293 ret = __write_cpudesc(fd, cpuinfo_procs[i]);
301 static int write_nrcpus(int fd, struct perf_header *h __maybe_unused,
302 struct perf_evlist *evlist __maybe_unused)
308 nrc = cpu__max_present_cpu();
310 nr = sysconf(_SC_NPROCESSORS_ONLN);
314 nra = (u32)(nr & UINT_MAX);
316 ret = do_write(fd, &nrc, sizeof(nrc));
320 return do_write(fd, &nra, sizeof(nra));
323 static int write_event_desc(int fd, struct perf_header *h __maybe_unused,
324 struct perf_evlist *evlist)
326 struct perf_evsel *evsel;
330 nre = evlist->nr_entries;
333 * write number of events
335 ret = do_write(fd, &nre, sizeof(nre));
340 * size of perf_event_attr struct
342 sz = (u32)sizeof(evsel->attr);
343 ret = do_write(fd, &sz, sizeof(sz));
347 evlist__for_each_entry(evlist, evsel) {
348 ret = do_write(fd, &evsel->attr, sz);
352 * write number of unique id per event
353 * there is one id per instance of an event
355 * copy into an nri to be independent of the
359 ret = do_write(fd, &nri, sizeof(nri));
364 * write event string as passed on cmdline
366 ret = do_write_string(fd, perf_evsel__name(evsel));
370 * write unique ids for this event
372 ret = do_write(fd, evsel->id, evsel->ids * sizeof(u64));
379 static int write_cmdline(int fd, struct perf_header *h __maybe_unused,
380 struct perf_evlist *evlist __maybe_unused)
382 char buf[MAXPATHLEN];
386 /* actual path to perf binary */
387 ret = readlink("/proc/self/exe", buf, sizeof(buf) - 1);
391 /* readlink() does not add null termination */
394 /* account for binary path */
395 n = perf_env.nr_cmdline + 1;
397 ret = do_write(fd, &n, sizeof(n));
401 ret = do_write_string(fd, buf);
405 for (i = 0 ; i < perf_env.nr_cmdline; i++) {
406 ret = do_write_string(fd, perf_env.cmdline_argv[i]);
413 #define CORE_SIB_FMT \
414 "/sys/devices/system/cpu/cpu%d/topology/core_siblings_list"
415 #define THRD_SIB_FMT \
416 "/sys/devices/system/cpu/cpu%d/topology/thread_siblings_list"
422 char **core_siblings;
423 char **thread_siblings;
426 static int build_cpu_topo(struct cpu_topo *tp, int cpu)
429 char filename[MAXPATHLEN];
430 char *buf = NULL, *p;
436 sprintf(filename, CORE_SIB_FMT, cpu);
437 fp = fopen(filename, "r");
441 sret = getline(&buf, &len, fp);
446 p = strchr(buf, '\n');
450 for (i = 0; i < tp->core_sib; i++) {
451 if (!strcmp(buf, tp->core_siblings[i]))
454 if (i == tp->core_sib) {
455 tp->core_siblings[i] = buf;
463 sprintf(filename, THRD_SIB_FMT, cpu);
464 fp = fopen(filename, "r");
468 if (getline(&buf, &len, fp) <= 0)
471 p = strchr(buf, '\n');
475 for (i = 0; i < tp->thread_sib; i++) {
476 if (!strcmp(buf, tp->thread_siblings[i]))
479 if (i == tp->thread_sib) {
480 tp->thread_siblings[i] = buf;
492 static void free_cpu_topo(struct cpu_topo *tp)
499 for (i = 0 ; i < tp->core_sib; i++)
500 zfree(&tp->core_siblings[i]);
502 for (i = 0 ; i < tp->thread_sib; i++)
503 zfree(&tp->thread_siblings[i]);
508 static struct cpu_topo *build_cpu_topology(void)
510 struct cpu_topo *tp = NULL;
518 ncpus = cpu__max_present_cpu();
520 /* build online CPU map */
521 map = cpu_map__new(NULL);
523 pr_debug("failed to get system cpumap\n");
527 nr = (u32)(ncpus & UINT_MAX);
529 sz = nr * sizeof(char *);
530 addr = calloc(1, sizeof(*tp) + 2 * sz);
537 tp->core_siblings = addr;
539 tp->thread_siblings = addr;
541 for (i = 0; i < nr; i++) {
542 if (!cpu_map__has(map, i))
545 ret = build_cpu_topo(tp, i);
559 static int write_cpu_topology(int fd, struct perf_header *h __maybe_unused,
560 struct perf_evlist *evlist __maybe_unused)
566 tp = build_cpu_topology();
570 ret = do_write(fd, &tp->core_sib, sizeof(tp->core_sib));
574 for (i = 0; i < tp->core_sib; i++) {
575 ret = do_write_string(fd, tp->core_siblings[i]);
579 ret = do_write(fd, &tp->thread_sib, sizeof(tp->thread_sib));
583 for (i = 0; i < tp->thread_sib; i++) {
584 ret = do_write_string(fd, tp->thread_siblings[i]);
589 ret = perf_env__read_cpu_topology_map(&perf_env);
593 for (j = 0; j < perf_env.nr_cpus_avail; j++) {
594 ret = do_write(fd, &perf_env.cpu[j].core_id,
595 sizeof(perf_env.cpu[j].core_id));
598 ret = do_write(fd, &perf_env.cpu[j].socket_id,
599 sizeof(perf_env.cpu[j].socket_id));
610 static int write_total_mem(int fd, struct perf_header *h __maybe_unused,
611 struct perf_evlist *evlist __maybe_unused)
619 fp = fopen("/proc/meminfo", "r");
623 while (getline(&buf, &len, fp) > 0) {
624 ret = strncmp(buf, "MemTotal:", 9);
629 n = sscanf(buf, "%*s %"PRIu64, &mem);
631 ret = do_write(fd, &mem, sizeof(mem));
639 static int write_topo_node(int fd, int node)
641 char str[MAXPATHLEN];
643 char *buf = NULL, *p;
646 u64 mem_total, mem_free, mem;
649 sprintf(str, "/sys/devices/system/node/node%d/meminfo", node);
650 fp = fopen(str, "r");
654 while (getline(&buf, &len, fp) > 0) {
655 /* skip over invalid lines */
656 if (!strchr(buf, ':'))
658 if (sscanf(buf, "%*s %*d %31s %"PRIu64, field, &mem) != 2)
660 if (!strcmp(field, "MemTotal:"))
662 if (!strcmp(field, "MemFree:"))
669 ret = do_write(fd, &mem_total, sizeof(u64));
673 ret = do_write(fd, &mem_free, sizeof(u64));
678 sprintf(str, "/sys/devices/system/node/node%d/cpulist", node);
680 fp = fopen(str, "r");
684 if (getline(&buf, &len, fp) <= 0)
687 p = strchr(buf, '\n');
691 ret = do_write_string(fd, buf);
699 static int write_numa_topology(int fd, struct perf_header *h __maybe_unused,
700 struct perf_evlist *evlist __maybe_unused)
705 struct cpu_map *node_map = NULL;
710 fp = fopen("/sys/devices/system/node/online", "r");
714 if (getline(&buf, &len, fp) <= 0)
717 c = strchr(buf, '\n');
721 node_map = cpu_map__new(buf);
725 nr = (u32)node_map->nr;
727 ret = do_write(fd, &nr, sizeof(nr));
731 for (i = 0; i < nr; i++) {
732 j = (u32)node_map->map[i];
733 ret = do_write(fd, &j, sizeof(j));
737 ret = write_topo_node(fd, i);
744 cpu_map__put(node_map);
751 * struct pmu_mappings {
760 static int write_pmu_mappings(int fd, struct perf_header *h __maybe_unused,
761 struct perf_evlist *evlist __maybe_unused)
763 struct perf_pmu *pmu = NULL;
764 off_t offset = lseek(fd, 0, SEEK_CUR);
768 /* write real pmu_num later */
769 ret = do_write(fd, &pmu_num, sizeof(pmu_num));
773 while ((pmu = perf_pmu__scan(pmu))) {
778 ret = do_write(fd, &pmu->type, sizeof(pmu->type));
782 ret = do_write_string(fd, pmu->name);
787 if (pwrite(fd, &pmu_num, sizeof(pmu_num), offset) != sizeof(pmu_num)) {
789 lseek(fd, offset, SEEK_SET);
799 * struct group_descs {
801 * struct group_desc {
808 static int write_group_desc(int fd, struct perf_header *h __maybe_unused,
809 struct perf_evlist *evlist)
811 u32 nr_groups = evlist->nr_groups;
812 struct perf_evsel *evsel;
815 ret = do_write(fd, &nr_groups, sizeof(nr_groups));
819 evlist__for_each_entry(evlist, evsel) {
820 if (perf_evsel__is_group_leader(evsel) &&
821 evsel->nr_members > 1) {
822 const char *name = evsel->group_name ?: "{anon_group}";
823 u32 leader_idx = evsel->idx;
824 u32 nr_members = evsel->nr_members;
826 ret = do_write_string(fd, name);
830 ret = do_write(fd, &leader_idx, sizeof(leader_idx));
834 ret = do_write(fd, &nr_members, sizeof(nr_members));
843 * default get_cpuid(): nothing gets recorded
844 * actual implementation must be in arch/$(ARCH)/util/header.c
846 int __weak get_cpuid(char *buffer __maybe_unused, size_t sz __maybe_unused)
851 static int write_cpuid(int fd, struct perf_header *h __maybe_unused,
852 struct perf_evlist *evlist __maybe_unused)
857 ret = get_cpuid(buffer, sizeof(buffer));
863 return do_write_string(fd, buffer);
866 static int write_branch_stack(int fd __maybe_unused,
867 struct perf_header *h __maybe_unused,
868 struct perf_evlist *evlist __maybe_unused)
873 static int write_auxtrace(int fd, struct perf_header *h,
874 struct perf_evlist *evlist __maybe_unused)
876 struct perf_session *session;
879 session = container_of(h, struct perf_session, header);
881 err = auxtrace_index__write(fd, &session->auxtrace_index);
883 pr_err("Failed to write auxtrace index\n");
887 static int cpu_cache_level__sort(const void *a, const void *b)
889 struct cpu_cache_level *cache_a = (struct cpu_cache_level *)a;
890 struct cpu_cache_level *cache_b = (struct cpu_cache_level *)b;
892 return cache_a->level - cache_b->level;
895 static bool cpu_cache_level__cmp(struct cpu_cache_level *a, struct cpu_cache_level *b)
897 if (a->level != b->level)
900 if (a->line_size != b->line_size)
903 if (a->sets != b->sets)
906 if (a->ways != b->ways)
909 if (strcmp(a->type, b->type))
912 if (strcmp(a->size, b->size))
915 if (strcmp(a->map, b->map))
921 static int cpu_cache_level__read(struct cpu_cache_level *cache, u32 cpu, u16 level)
923 char path[PATH_MAX], file[PATH_MAX];
927 scnprintf(path, PATH_MAX, "devices/system/cpu/cpu%d/cache/index%d/", cpu, level);
928 scnprintf(file, PATH_MAX, "%s/%s", sysfs__mountpoint(), path);
933 scnprintf(file, PATH_MAX, "%s/level", path);
934 if (sysfs__read_int(file, (int *) &cache->level))
937 scnprintf(file, PATH_MAX, "%s/coherency_line_size", path);
938 if (sysfs__read_int(file, (int *) &cache->line_size))
941 scnprintf(file, PATH_MAX, "%s/number_of_sets", path);
942 if (sysfs__read_int(file, (int *) &cache->sets))
945 scnprintf(file, PATH_MAX, "%s/ways_of_associativity", path);
946 if (sysfs__read_int(file, (int *) &cache->ways))
949 scnprintf(file, PATH_MAX, "%s/type", path);
950 if (sysfs__read_str(file, &cache->type, &len))
953 cache->type[len] = 0;
954 cache->type = rtrim(cache->type);
956 scnprintf(file, PATH_MAX, "%s/size", path);
957 if (sysfs__read_str(file, &cache->size, &len)) {
962 cache->size[len] = 0;
963 cache->size = rtrim(cache->size);
965 scnprintf(file, PATH_MAX, "%s/shared_cpu_list", path);
966 if (sysfs__read_str(file, &cache->map, &len)) {
973 cache->map = rtrim(cache->map);
977 static void cpu_cache_level__fprintf(FILE *out, struct cpu_cache_level *c)
979 fprintf(out, "L%d %-15s %8s [%s]\n", c->level, c->type, c->size, c->map);
982 static int build_caches(struct cpu_cache_level caches[], u32 size, u32 *cntp)
989 ncpus = sysconf(_SC_NPROCESSORS_CONF);
993 nr = (u32)(ncpus & UINT_MAX);
995 for (cpu = 0; cpu < nr; cpu++) {
996 for (level = 0; level < 10; level++) {
997 struct cpu_cache_level c;
1000 err = cpu_cache_level__read(&c, cpu, level);
1007 for (i = 0; i < cnt; i++) {
1008 if (cpu_cache_level__cmp(&c, &caches[i]))
1015 cpu_cache_level__free(&c);
1017 if (WARN_ONCE(cnt == size, "way too many cpu caches.."))
1026 #define MAX_CACHES 2000
1028 static int write_cache(int fd, struct perf_header *h __maybe_unused,
1029 struct perf_evlist *evlist __maybe_unused)
1031 struct cpu_cache_level caches[MAX_CACHES];
1032 u32 cnt = 0, i, version = 1;
1035 ret = build_caches(caches, MAX_CACHES, &cnt);
1039 qsort(&caches, cnt, sizeof(struct cpu_cache_level), cpu_cache_level__sort);
1041 ret = do_write(fd, &version, sizeof(u32));
1045 ret = do_write(fd, &cnt, sizeof(u32));
1049 for (i = 0; i < cnt; i++) {
1050 struct cpu_cache_level *c = &caches[i];
1053 ret = do_write(fd, &c->v, sizeof(u32)); \
1064 ret = do_write_string(fd, (const char *) c->v); \
1075 for (i = 0; i < cnt; i++)
1076 cpu_cache_level__free(&caches[i]);
1080 static int write_stat(int fd __maybe_unused,
1081 struct perf_header *h __maybe_unused,
1082 struct perf_evlist *evlist __maybe_unused)
1087 static void print_hostname(struct perf_header *ph, int fd __maybe_unused,
1090 fprintf(fp, "# hostname : %s\n", ph->env.hostname);
1093 static void print_osrelease(struct perf_header *ph, int fd __maybe_unused,
1096 fprintf(fp, "# os release : %s\n", ph->env.os_release);
1099 static void print_arch(struct perf_header *ph, int fd __maybe_unused, FILE *fp)
1101 fprintf(fp, "# arch : %s\n", ph->env.arch);
1104 static void print_cpudesc(struct perf_header *ph, int fd __maybe_unused,
1107 fprintf(fp, "# cpudesc : %s\n", ph->env.cpu_desc);
1110 static void print_nrcpus(struct perf_header *ph, int fd __maybe_unused,
1113 fprintf(fp, "# nrcpus online : %u\n", ph->env.nr_cpus_online);
1114 fprintf(fp, "# nrcpus avail : %u\n", ph->env.nr_cpus_avail);
1117 static void print_version(struct perf_header *ph, int fd __maybe_unused,
1120 fprintf(fp, "# perf version : %s\n", ph->env.version);
1123 static void print_cmdline(struct perf_header *ph, int fd __maybe_unused,
1128 nr = ph->env.nr_cmdline;
1130 fprintf(fp, "# cmdline : ");
1132 for (i = 0; i < nr; i++)
1133 fprintf(fp, "%s ", ph->env.cmdline_argv[i]);
1137 static void print_cpu_topology(struct perf_header *ph, int fd __maybe_unused,
1142 int cpu_nr = ph->env.nr_cpus_avail;
1144 nr = ph->env.nr_sibling_cores;
1145 str = ph->env.sibling_cores;
1147 for (i = 0; i < nr; i++) {
1148 fprintf(fp, "# sibling cores : %s\n", str);
1149 str += strlen(str) + 1;
1152 nr = ph->env.nr_sibling_threads;
1153 str = ph->env.sibling_threads;
1155 for (i = 0; i < nr; i++) {
1156 fprintf(fp, "# sibling threads : %s\n", str);
1157 str += strlen(str) + 1;
1160 if (ph->env.cpu != NULL) {
1161 for (i = 0; i < cpu_nr; i++)
1162 fprintf(fp, "# CPU %d: Core ID %d, Socket ID %d\n", i,
1163 ph->env.cpu[i].core_id, ph->env.cpu[i].socket_id);
1165 fprintf(fp, "# Core ID and Socket ID information is not available\n");
1168 static void free_event_desc(struct perf_evsel *events)
1170 struct perf_evsel *evsel;
1175 for (evsel = events; evsel->attr.size; evsel++) {
1176 zfree(&evsel->name);
1183 static struct perf_evsel *
1184 read_event_desc(struct perf_header *ph, int fd)
1186 struct perf_evsel *evsel, *events = NULL;
1189 u32 nre, sz, nr, i, j;
1193 /* number of events */
1194 ret = readn(fd, &nre, sizeof(nre));
1195 if (ret != (ssize_t)sizeof(nre))
1199 nre = bswap_32(nre);
1201 ret = readn(fd, &sz, sizeof(sz));
1202 if (ret != (ssize_t)sizeof(sz))
1208 /* buffer to hold on file attr struct */
1213 /* the last event terminates with evsel->attr.size == 0: */
1214 events = calloc(nre + 1, sizeof(*events));
1218 msz = sizeof(evsel->attr);
1222 for (i = 0, evsel = events; i < nre; evsel++, i++) {
1226 * must read entire on-file attr struct to
1227 * sync up with layout.
1229 ret = readn(fd, buf, sz);
1230 if (ret != (ssize_t)sz)
1234 perf_event__attr_swap(buf);
1236 memcpy(&evsel->attr, buf, msz);
1238 ret = readn(fd, &nr, sizeof(nr));
1239 if (ret != (ssize_t)sizeof(nr))
1242 if (ph->needs_swap) {
1244 evsel->needs_swap = true;
1247 evsel->name = do_read_string(fd, ph);
1252 id = calloc(nr, sizeof(*id));
1258 for (j = 0 ; j < nr; j++) {
1259 ret = readn(fd, id, sizeof(*id));
1260 if (ret != (ssize_t)sizeof(*id))
1263 *id = bswap_64(*id);
1271 free_event_desc(events);
1276 static int __desc_attr__fprintf(FILE *fp, const char *name, const char *val,
1277 void *priv __attribute__((unused)))
1279 return fprintf(fp, ", %s = %s", name, val);
1282 static void print_event_desc(struct perf_header *ph, int fd, FILE *fp)
1284 struct perf_evsel *evsel, *events = read_event_desc(ph, fd);
1289 fprintf(fp, "# event desc: not available or unable to read\n");
1293 for (evsel = events; evsel->attr.size; evsel++) {
1294 fprintf(fp, "# event : name = %s, ", evsel->name);
1297 fprintf(fp, ", id = {");
1298 for (j = 0, id = evsel->id; j < evsel->ids; j++, id++) {
1301 fprintf(fp, " %"PRIu64, *id);
1306 perf_event_attr__fprintf(fp, &evsel->attr, __desc_attr__fprintf, NULL);
1311 free_event_desc(events);
1314 static void print_total_mem(struct perf_header *ph, int fd __maybe_unused,
1317 fprintf(fp, "# total memory : %Lu kB\n", ph->env.total_mem);
1320 static void print_numa_topology(struct perf_header *ph, int fd __maybe_unused,
1324 struct numa_node *n;
1326 for (i = 0; i < ph->env.nr_numa_nodes; i++) {
1327 n = &ph->env.numa_nodes[i];
1329 fprintf(fp, "# node%u meminfo : total = %"PRIu64" kB,"
1330 " free = %"PRIu64" kB\n",
1331 n->node, n->mem_total, n->mem_free);
1333 fprintf(fp, "# node%u cpu list : ", n->node);
1334 cpu_map__fprintf(n->map, fp);
1338 static void print_cpuid(struct perf_header *ph, int fd __maybe_unused, FILE *fp)
1340 fprintf(fp, "# cpuid : %s\n", ph->env.cpuid);
1343 static void print_branch_stack(struct perf_header *ph __maybe_unused,
1344 int fd __maybe_unused, FILE *fp)
1346 fprintf(fp, "# contains samples with branch stack\n");
1349 static void print_auxtrace(struct perf_header *ph __maybe_unused,
1350 int fd __maybe_unused, FILE *fp)
1352 fprintf(fp, "# contains AUX area data (e.g. instruction trace)\n");
1355 static void print_stat(struct perf_header *ph __maybe_unused,
1356 int fd __maybe_unused, FILE *fp)
1358 fprintf(fp, "# contains stat data\n");
1361 static void print_cache(struct perf_header *ph __maybe_unused,
1362 int fd __maybe_unused, FILE *fp __maybe_unused)
1366 fprintf(fp, "# CPU cache info:\n");
1367 for (i = 0; i < ph->env.caches_cnt; i++) {
1369 cpu_cache_level__fprintf(fp, &ph->env.caches[i]);
1373 static void print_pmu_mappings(struct perf_header *ph, int fd __maybe_unused,
1376 const char *delimiter = "# pmu mappings: ";
1381 pmu_num = ph->env.nr_pmu_mappings;
1383 fprintf(fp, "# pmu mappings: not available\n");
1387 str = ph->env.pmu_mappings;
1390 type = strtoul(str, &tmp, 0);
1395 fprintf(fp, "%s%s = %" PRIu32, delimiter, str, type);
1398 str += strlen(str) + 1;
1407 fprintf(fp, "# pmu mappings: unable to read\n");
1410 static void print_group_desc(struct perf_header *ph, int fd __maybe_unused,
1413 struct perf_session *session;
1414 struct perf_evsel *evsel;
1417 session = container_of(ph, struct perf_session, header);
1419 evlist__for_each_entry(session->evlist, evsel) {
1420 if (perf_evsel__is_group_leader(evsel) &&
1421 evsel->nr_members > 1) {
1422 fprintf(fp, "# group: %s{%s", evsel->group_name ?: "",
1423 perf_evsel__name(evsel));
1425 nr = evsel->nr_members - 1;
1427 fprintf(fp, ",%s", perf_evsel__name(evsel));
1435 static int __event_process_build_id(struct build_id_event *bev,
1437 struct perf_session *session)
1440 struct machine *machine;
1443 enum dso_kernel_type dso_type;
1445 machine = perf_session__findnew_machine(session, bev->pid);
1449 cpumode = bev->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
1452 case PERF_RECORD_MISC_KERNEL:
1453 dso_type = DSO_TYPE_KERNEL;
1455 case PERF_RECORD_MISC_GUEST_KERNEL:
1456 dso_type = DSO_TYPE_GUEST_KERNEL;
1458 case PERF_RECORD_MISC_USER:
1459 case PERF_RECORD_MISC_GUEST_USER:
1460 dso_type = DSO_TYPE_USER;
1466 dso = machine__findnew_dso(machine, filename);
1468 char sbuild_id[SBUILD_ID_SIZE];
1470 dso__set_build_id(dso, &bev->build_id);
1472 if (!is_kernel_module(filename, cpumode))
1473 dso->kernel = dso_type;
1475 build_id__sprintf(dso->build_id, sizeof(dso->build_id),
1477 pr_debug("build id event received for %s: %s\n",
1478 dso->long_name, sbuild_id);
1487 static int perf_header__read_build_ids_abi_quirk(struct perf_header *header,
1488 int input, u64 offset, u64 size)
1490 struct perf_session *session = container_of(header, struct perf_session, header);
1492 struct perf_event_header header;
1493 u8 build_id[PERF_ALIGN(BUILD_ID_SIZE, sizeof(u64))];
1496 struct build_id_event bev;
1497 char filename[PATH_MAX];
1498 u64 limit = offset + size;
1500 while (offset < limit) {
1503 if (readn(input, &old_bev, sizeof(old_bev)) != sizeof(old_bev))
1506 if (header->needs_swap)
1507 perf_event_header__bswap(&old_bev.header);
1509 len = old_bev.header.size - sizeof(old_bev);
1510 if (readn(input, filename, len) != len)
1513 bev.header = old_bev.header;
1516 * As the pid is the missing value, we need to fill
1517 * it properly. The header.misc value give us nice hint.
1519 bev.pid = HOST_KERNEL_ID;
1520 if (bev.header.misc == PERF_RECORD_MISC_GUEST_USER ||
1521 bev.header.misc == PERF_RECORD_MISC_GUEST_KERNEL)
1522 bev.pid = DEFAULT_GUEST_KERNEL_ID;
1524 memcpy(bev.build_id, old_bev.build_id, sizeof(bev.build_id));
1525 __event_process_build_id(&bev, filename, session);
1527 offset += bev.header.size;
1533 static int perf_header__read_build_ids(struct perf_header *header,
1534 int input, u64 offset, u64 size)
1536 struct perf_session *session = container_of(header, struct perf_session, header);
1537 struct build_id_event bev;
1538 char filename[PATH_MAX];
1539 u64 limit = offset + size, orig_offset = offset;
1542 while (offset < limit) {
1545 if (readn(input, &bev, sizeof(bev)) != sizeof(bev))
1548 if (header->needs_swap)
1549 perf_event_header__bswap(&bev.header);
1551 len = bev.header.size - sizeof(bev);
1552 if (readn(input, filename, len) != len)
1555 * The a1645ce1 changeset:
1557 * "perf: 'perf kvm' tool for monitoring guest performance from host"
1559 * Added a field to struct build_id_event that broke the file
1562 * Since the kernel build-id is the first entry, process the
1563 * table using the old format if the well known
1564 * '[kernel.kallsyms]' string for the kernel build-id has the
1565 * first 4 characters chopped off (where the pid_t sits).
1567 if (memcmp(filename, "nel.kallsyms]", 13) == 0) {
1568 if (lseek(input, orig_offset, SEEK_SET) == (off_t)-1)
1570 return perf_header__read_build_ids_abi_quirk(header, input, offset, size);
1573 __event_process_build_id(&bev, filename, session);
1575 offset += bev.header.size;
1582 static int process_tracing_data(struct perf_file_section *section __maybe_unused,
1583 struct perf_header *ph __maybe_unused,
1586 ssize_t ret = trace_report(fd, data, false);
1587 return ret < 0 ? -1 : 0;
1590 static int process_build_id(struct perf_file_section *section,
1591 struct perf_header *ph, int fd,
1592 void *data __maybe_unused)
1594 if (perf_header__read_build_ids(ph, fd, section->offset, section->size))
1595 pr_debug("Failed to read buildids, continuing...\n");
1599 static int process_hostname(struct perf_file_section *section __maybe_unused,
1600 struct perf_header *ph, int fd,
1601 void *data __maybe_unused)
1603 ph->env.hostname = do_read_string(fd, ph);
1604 return ph->env.hostname ? 0 : -ENOMEM;
1607 static int process_osrelease(struct perf_file_section *section __maybe_unused,
1608 struct perf_header *ph, int fd,
1609 void *data __maybe_unused)
1611 ph->env.os_release = do_read_string(fd, ph);
1612 return ph->env.os_release ? 0 : -ENOMEM;
1615 static int process_version(struct perf_file_section *section __maybe_unused,
1616 struct perf_header *ph, int fd,
1617 void *data __maybe_unused)
1619 ph->env.version = do_read_string(fd, ph);
1620 return ph->env.version ? 0 : -ENOMEM;
1623 static int process_arch(struct perf_file_section *section __maybe_unused,
1624 struct perf_header *ph, int fd,
1625 void *data __maybe_unused)
1627 ph->env.arch = do_read_string(fd, ph);
1628 return ph->env.arch ? 0 : -ENOMEM;
1631 static int process_nrcpus(struct perf_file_section *section __maybe_unused,
1632 struct perf_header *ph, int fd,
1633 void *data __maybe_unused)
1638 ret = readn(fd, &nr, sizeof(nr));
1639 if (ret != sizeof(nr))
1645 ph->env.nr_cpus_avail = nr;
1647 ret = readn(fd, &nr, sizeof(nr));
1648 if (ret != sizeof(nr))
1654 ph->env.nr_cpus_online = nr;
1658 static int process_cpudesc(struct perf_file_section *section __maybe_unused,
1659 struct perf_header *ph, int fd,
1660 void *data __maybe_unused)
1662 ph->env.cpu_desc = do_read_string(fd, ph);
1663 return ph->env.cpu_desc ? 0 : -ENOMEM;
1666 static int process_cpuid(struct perf_file_section *section __maybe_unused,
1667 struct perf_header *ph, int fd,
1668 void *data __maybe_unused)
1670 ph->env.cpuid = do_read_string(fd, ph);
1671 return ph->env.cpuid ? 0 : -ENOMEM;
1674 static int process_total_mem(struct perf_file_section *section __maybe_unused,
1675 struct perf_header *ph, int fd,
1676 void *data __maybe_unused)
1681 ret = readn(fd, &mem, sizeof(mem));
1682 if (ret != sizeof(mem))
1686 mem = bswap_64(mem);
1688 ph->env.total_mem = mem;
1692 static struct perf_evsel *
1693 perf_evlist__find_by_index(struct perf_evlist *evlist, int idx)
1695 struct perf_evsel *evsel;
1697 evlist__for_each_entry(evlist, evsel) {
1698 if (evsel->idx == idx)
1706 perf_evlist__set_event_name(struct perf_evlist *evlist,
1707 struct perf_evsel *event)
1709 struct perf_evsel *evsel;
1714 evsel = perf_evlist__find_by_index(evlist, event->idx);
1721 evsel->name = strdup(event->name);
1725 process_event_desc(struct perf_file_section *section __maybe_unused,
1726 struct perf_header *header, int fd,
1727 void *data __maybe_unused)
1729 struct perf_session *session;
1730 struct perf_evsel *evsel, *events = read_event_desc(header, fd);
1735 session = container_of(header, struct perf_session, header);
1736 for (evsel = events; evsel->attr.size; evsel++)
1737 perf_evlist__set_event_name(session->evlist, evsel);
1739 free_event_desc(events);
1744 static int process_cmdline(struct perf_file_section *section,
1745 struct perf_header *ph, int fd,
1746 void *data __maybe_unused)
1749 char *str, *cmdline = NULL, **argv = NULL;
1752 ret = readn(fd, &nr, sizeof(nr));
1753 if (ret != sizeof(nr))
1759 ph->env.nr_cmdline = nr;
1761 cmdline = zalloc(section->size + nr + 1);
1765 argv = zalloc(sizeof(char *) * (nr + 1));
1769 for (i = 0; i < nr; i++) {
1770 str = do_read_string(fd, ph);
1774 argv[i] = cmdline + len;
1775 memcpy(argv[i], str, strlen(str) + 1);
1776 len += strlen(str) + 1;
1779 ph->env.cmdline = cmdline;
1780 ph->env.cmdline_argv = (const char **) argv;
1789 static int process_cpu_topology(struct perf_file_section *section,
1790 struct perf_header *ph, int fd,
1791 void *data __maybe_unused)
1797 int cpu_nr = ph->env.nr_cpus_avail;
1800 ph->env.cpu = calloc(cpu_nr, sizeof(*ph->env.cpu));
1804 ret = readn(fd, &nr, sizeof(nr));
1805 if (ret != sizeof(nr))
1811 ph->env.nr_sibling_cores = nr;
1812 size += sizeof(u32);
1813 if (strbuf_init(&sb, 128) < 0)
1816 for (i = 0; i < nr; i++) {
1817 str = do_read_string(fd, ph);
1821 /* include a NULL character at the end */
1822 if (strbuf_add(&sb, str, strlen(str) + 1) < 0)
1824 size += string_size(str);
1827 ph->env.sibling_cores = strbuf_detach(&sb, NULL);
1829 ret = readn(fd, &nr, sizeof(nr));
1830 if (ret != sizeof(nr))
1836 ph->env.nr_sibling_threads = nr;
1837 size += sizeof(u32);
1839 for (i = 0; i < nr; i++) {
1840 str = do_read_string(fd, ph);
1844 /* include a NULL character at the end */
1845 if (strbuf_add(&sb, str, strlen(str) + 1) < 0)
1847 size += string_size(str);
1850 ph->env.sibling_threads = strbuf_detach(&sb, NULL);
1853 * The header may be from old perf,
1854 * which doesn't include core id and socket id information.
1856 if (section->size <= size) {
1857 zfree(&ph->env.cpu);
1861 for (i = 0; i < (u32)cpu_nr; i++) {
1862 ret = readn(fd, &nr, sizeof(nr));
1863 if (ret != sizeof(nr))
1869 ph->env.cpu[i].core_id = nr;
1871 ret = readn(fd, &nr, sizeof(nr));
1872 if (ret != sizeof(nr))
1878 if (nr != (u32)-1 && nr > (u32)cpu_nr) {
1879 pr_debug("socket_id number is too big."
1880 "You may need to upgrade the perf tool.\n");
1884 ph->env.cpu[i].socket_id = nr;
1890 strbuf_release(&sb);
1892 zfree(&ph->env.cpu);
1896 static int process_numa_topology(struct perf_file_section *section __maybe_unused,
1897 struct perf_header *ph, int fd,
1898 void *data __maybe_unused)
1900 struct numa_node *nodes, *n;
1906 ret = readn(fd, &nr, sizeof(nr));
1907 if (ret != sizeof(nr))
1913 nodes = zalloc(sizeof(*nodes) * nr);
1917 for (i = 0; i < nr; i++) {
1921 ret = readn(fd, &n->node, sizeof(u32));
1922 if (ret != sizeof(n->node))
1925 ret = readn(fd, &n->mem_total, sizeof(u64));
1926 if (ret != sizeof(u64))
1929 ret = readn(fd, &n->mem_free, sizeof(u64));
1930 if (ret != sizeof(u64))
1933 if (ph->needs_swap) {
1934 n->node = bswap_32(n->node);
1935 n->mem_total = bswap_64(n->mem_total);
1936 n->mem_free = bswap_64(n->mem_free);
1939 str = do_read_string(fd, ph);
1943 n->map = cpu_map__new(str);
1949 ph->env.nr_numa_nodes = nr;
1950 ph->env.numa_nodes = nodes;
1958 static int process_pmu_mappings(struct perf_file_section *section __maybe_unused,
1959 struct perf_header *ph, int fd,
1960 void *data __maybe_unused)
1968 ret = readn(fd, &pmu_num, sizeof(pmu_num));
1969 if (ret != sizeof(pmu_num))
1973 pmu_num = bswap_32(pmu_num);
1976 pr_debug("pmu mappings not available\n");
1980 ph->env.nr_pmu_mappings = pmu_num;
1981 if (strbuf_init(&sb, 128) < 0)
1985 if (readn(fd, &type, sizeof(type)) != sizeof(type))
1988 type = bswap_32(type);
1990 name = do_read_string(fd, ph);
1994 if (strbuf_addf(&sb, "%u:%s", type, name) < 0)
1996 /* include a NULL character at the end */
1997 if (strbuf_add(&sb, "", 1) < 0)
2000 if (!strcmp(name, "msr"))
2001 ph->env.msr_pmu_type = type;
2006 ph->env.pmu_mappings = strbuf_detach(&sb, NULL);
2010 strbuf_release(&sb);
2014 static int process_group_desc(struct perf_file_section *section __maybe_unused,
2015 struct perf_header *ph, int fd,
2016 void *data __maybe_unused)
2019 u32 i, nr, nr_groups;
2020 struct perf_session *session;
2021 struct perf_evsel *evsel, *leader = NULL;
2028 if (readn(fd, &nr_groups, sizeof(nr_groups)) != sizeof(nr_groups))
2032 nr_groups = bswap_32(nr_groups);
2034 ph->env.nr_groups = nr_groups;
2036 pr_debug("group desc not available\n");
2040 desc = calloc(nr_groups, sizeof(*desc));
2044 for (i = 0; i < nr_groups; i++) {
2045 desc[i].name = do_read_string(fd, ph);
2049 if (readn(fd, &desc[i].leader_idx, sizeof(u32)) != sizeof(u32))
2052 if (readn(fd, &desc[i].nr_members, sizeof(u32)) != sizeof(u32))
2055 if (ph->needs_swap) {
2056 desc[i].leader_idx = bswap_32(desc[i].leader_idx);
2057 desc[i].nr_members = bswap_32(desc[i].nr_members);
2062 * Rebuild group relationship based on the group_desc
2064 session = container_of(ph, struct perf_session, header);
2065 session->evlist->nr_groups = nr_groups;
2068 evlist__for_each_entry(session->evlist, evsel) {
2069 if (evsel->idx == (int) desc[i].leader_idx) {
2070 evsel->leader = evsel;
2071 /* {anon_group} is a dummy name */
2072 if (strcmp(desc[i].name, "{anon_group}")) {
2073 evsel->group_name = desc[i].name;
2074 desc[i].name = NULL;
2076 evsel->nr_members = desc[i].nr_members;
2078 if (i >= nr_groups || nr > 0) {
2079 pr_debug("invalid group desc\n");
2084 nr = evsel->nr_members - 1;
2087 /* This is a group member */
2088 evsel->leader = leader;
2094 if (i != nr_groups || nr != 0) {
2095 pr_debug("invalid group desc\n");
2101 for (i = 0; i < nr_groups; i++)
2102 zfree(&desc[i].name);
2108 static int process_auxtrace(struct perf_file_section *section,
2109 struct perf_header *ph, int fd,
2110 void *data __maybe_unused)
2112 struct perf_session *session;
2115 session = container_of(ph, struct perf_session, header);
2117 err = auxtrace_index__process(fd, section->size, session,
2120 pr_err("Failed to process auxtrace index\n");
2124 static int process_cache(struct perf_file_section *section __maybe_unused,
2125 struct perf_header *ph __maybe_unused, int fd __maybe_unused,
2126 void *data __maybe_unused)
2128 struct cpu_cache_level *caches;
2129 u32 cnt, i, version;
2131 if (readn(fd, &version, sizeof(version)) != sizeof(version))
2135 version = bswap_32(version);
2140 if (readn(fd, &cnt, sizeof(cnt)) != sizeof(cnt))
2144 cnt = bswap_32(cnt);
2146 caches = zalloc(sizeof(*caches) * cnt);
2150 for (i = 0; i < cnt; i++) {
2151 struct cpu_cache_level c;
2154 if (readn(fd, &c.v, sizeof(u32)) != sizeof(u32))\
2155 goto out_free_caches; \
2156 if (ph->needs_swap) \
2157 c.v = bswap_32(c.v); \
2166 c.v = do_read_string(fd, ph); \
2168 goto out_free_caches;
2178 ph->env.caches = caches;
2179 ph->env.caches_cnt = cnt;
2186 struct feature_ops {
2187 int (*write)(int fd, struct perf_header *h, struct perf_evlist *evlist);
2188 void (*print)(struct perf_header *h, int fd, FILE *fp);
2189 int (*process)(struct perf_file_section *section,
2190 struct perf_header *h, int fd, void *data);
2195 #define FEAT_OPA(n, func) \
2196 [n] = { .name = #n, .write = write_##func, .print = print_##func }
2197 #define FEAT_OPP(n, func) \
2198 [n] = { .name = #n, .write = write_##func, .print = print_##func, \
2199 .process = process_##func }
2200 #define FEAT_OPF(n, func) \
2201 [n] = { .name = #n, .write = write_##func, .print = print_##func, \
2202 .process = process_##func, .full_only = true }
2204 /* feature_ops not implemented: */
2205 #define print_tracing_data NULL
2206 #define print_build_id NULL
2208 static const struct feature_ops feat_ops[HEADER_LAST_FEATURE] = {
2209 FEAT_OPP(HEADER_TRACING_DATA, tracing_data),
2210 FEAT_OPP(HEADER_BUILD_ID, build_id),
2211 FEAT_OPP(HEADER_HOSTNAME, hostname),
2212 FEAT_OPP(HEADER_OSRELEASE, osrelease),
2213 FEAT_OPP(HEADER_VERSION, version),
2214 FEAT_OPP(HEADER_ARCH, arch),
2215 FEAT_OPP(HEADER_NRCPUS, nrcpus),
2216 FEAT_OPP(HEADER_CPUDESC, cpudesc),
2217 FEAT_OPP(HEADER_CPUID, cpuid),
2218 FEAT_OPP(HEADER_TOTAL_MEM, total_mem),
2219 FEAT_OPP(HEADER_EVENT_DESC, event_desc),
2220 FEAT_OPP(HEADER_CMDLINE, cmdline),
2221 FEAT_OPF(HEADER_CPU_TOPOLOGY, cpu_topology),
2222 FEAT_OPF(HEADER_NUMA_TOPOLOGY, numa_topology),
2223 FEAT_OPA(HEADER_BRANCH_STACK, branch_stack),
2224 FEAT_OPP(HEADER_PMU_MAPPINGS, pmu_mappings),
2225 FEAT_OPP(HEADER_GROUP_DESC, group_desc),
2226 FEAT_OPP(HEADER_AUXTRACE, auxtrace),
2227 FEAT_OPA(HEADER_STAT, stat),
2228 FEAT_OPF(HEADER_CACHE, cache),
2231 struct header_print_data {
2233 bool full; /* extended list of headers */
2236 static int perf_file_section__fprintf_info(struct perf_file_section *section,
2237 struct perf_header *ph,
2238 int feat, int fd, void *data)
2240 struct header_print_data *hd = data;
2242 if (lseek(fd, section->offset, SEEK_SET) == (off_t)-1) {
2243 pr_debug("Failed to lseek to %" PRIu64 " offset for feature "
2244 "%d, continuing...\n", section->offset, feat);
2247 if (feat >= HEADER_LAST_FEATURE) {
2248 pr_warning("unknown feature %d\n", feat);
2251 if (!feat_ops[feat].print)
2254 if (!feat_ops[feat].full_only || hd->full)
2255 feat_ops[feat].print(ph, fd, hd->fp);
2257 fprintf(hd->fp, "# %s info available, use -I to display\n",
2258 feat_ops[feat].name);
2263 int perf_header__fprintf_info(struct perf_session *session, FILE *fp, bool full)
2265 struct header_print_data hd;
2266 struct perf_header *header = &session->header;
2267 int fd = perf_data_file__fd(session->file);
2274 ret = fstat(fd, &st);
2278 fprintf(fp, "# captured on: %s", ctime(&st.st_ctime));
2280 perf_header__process_sections(header, fd, &hd,
2281 perf_file_section__fprintf_info);
2283 if (session->file->is_pipe)
2286 fprintf(fp, "# missing features: ");
2287 for_each_clear_bit(bit, header->adds_features, HEADER_LAST_FEATURE) {
2289 fprintf(fp, "%s ", feat_ops[bit].name);
2296 static int do_write_feat(int fd, struct perf_header *h, int type,
2297 struct perf_file_section **p,
2298 struct perf_evlist *evlist)
2303 if (perf_header__has_feat(h, type)) {
2304 if (!feat_ops[type].write)
2307 (*p)->offset = lseek(fd, 0, SEEK_CUR);
2309 err = feat_ops[type].write(fd, h, evlist);
2311 pr_debug("failed to write feature %s\n", feat_ops[type].name);
2313 /* undo anything written */
2314 lseek(fd, (*p)->offset, SEEK_SET);
2318 (*p)->size = lseek(fd, 0, SEEK_CUR) - (*p)->offset;
2324 static int perf_header__adds_write(struct perf_header *header,
2325 struct perf_evlist *evlist, int fd)
2328 struct perf_file_section *feat_sec, *p;
2334 nr_sections = bitmap_weight(header->adds_features, HEADER_FEAT_BITS);
2338 feat_sec = p = calloc(nr_sections, sizeof(*feat_sec));
2339 if (feat_sec == NULL)
2342 sec_size = sizeof(*feat_sec) * nr_sections;
2344 sec_start = header->feat_offset;
2345 lseek(fd, sec_start + sec_size, SEEK_SET);
2347 for_each_set_bit(feat, header->adds_features, HEADER_FEAT_BITS) {
2348 if (do_write_feat(fd, header, feat, &p, evlist))
2349 perf_header__clear_feat(header, feat);
2352 lseek(fd, sec_start, SEEK_SET);
2354 * may write more than needed due to dropped feature, but
2355 * this is okay, reader will skip the mising entries
2357 err = do_write(fd, feat_sec, sec_size);
2359 pr_debug("failed to write feature section\n");
2364 int perf_header__write_pipe(int fd)
2366 struct perf_pipe_file_header f_header;
2369 f_header = (struct perf_pipe_file_header){
2370 .magic = PERF_MAGIC,
2371 .size = sizeof(f_header),
2374 err = do_write(fd, &f_header, sizeof(f_header));
2376 pr_debug("failed to write perf pipe header\n");
2383 int perf_session__write_header(struct perf_session *session,
2384 struct perf_evlist *evlist,
2385 int fd, bool at_exit)
2387 struct perf_file_header f_header;
2388 struct perf_file_attr f_attr;
2389 struct perf_header *header = &session->header;
2390 struct perf_evsel *evsel;
2394 lseek(fd, sizeof(f_header), SEEK_SET);
2396 evlist__for_each_entry(session->evlist, evsel) {
2397 evsel->id_offset = lseek(fd, 0, SEEK_CUR);
2398 err = do_write(fd, evsel->id, evsel->ids * sizeof(u64));
2400 pr_debug("failed to write perf header\n");
2405 attr_offset = lseek(fd, 0, SEEK_CUR);
2407 evlist__for_each_entry(evlist, evsel) {
2408 f_attr = (struct perf_file_attr){
2409 .attr = evsel->attr,
2411 .offset = evsel->id_offset,
2412 .size = evsel->ids * sizeof(u64),
2415 err = do_write(fd, &f_attr, sizeof(f_attr));
2417 pr_debug("failed to write perf header attribute\n");
2422 if (!header->data_offset)
2423 header->data_offset = lseek(fd, 0, SEEK_CUR);
2424 header->feat_offset = header->data_offset + header->data_size;
2427 err = perf_header__adds_write(header, evlist, fd);
2432 f_header = (struct perf_file_header){
2433 .magic = PERF_MAGIC,
2434 .size = sizeof(f_header),
2435 .attr_size = sizeof(f_attr),
2437 .offset = attr_offset,
2438 .size = evlist->nr_entries * sizeof(f_attr),
2441 .offset = header->data_offset,
2442 .size = header->data_size,
2444 /* event_types is ignored, store zeros */
2447 memcpy(&f_header.adds_features, &header->adds_features, sizeof(header->adds_features));
2449 lseek(fd, 0, SEEK_SET);
2450 err = do_write(fd, &f_header, sizeof(f_header));
2452 pr_debug("failed to write perf header\n");
2455 lseek(fd, header->data_offset + header->data_size, SEEK_SET);
2460 static int perf_header__getbuffer64(struct perf_header *header,
2461 int fd, void *buf, size_t size)
2463 if (readn(fd, buf, size) <= 0)
2466 if (header->needs_swap)
2467 mem_bswap_64(buf, size);
2472 int perf_header__process_sections(struct perf_header *header, int fd,
2474 int (*process)(struct perf_file_section *section,
2475 struct perf_header *ph,
2476 int feat, int fd, void *data))
2478 struct perf_file_section *feat_sec, *sec;
2484 nr_sections = bitmap_weight(header->adds_features, HEADER_FEAT_BITS);
2488 feat_sec = sec = calloc(nr_sections, sizeof(*feat_sec));
2492 sec_size = sizeof(*feat_sec) * nr_sections;
2494 lseek(fd, header->feat_offset, SEEK_SET);
2496 err = perf_header__getbuffer64(header, fd, feat_sec, sec_size);
2500 for_each_set_bit(feat, header->adds_features, HEADER_LAST_FEATURE) {
2501 err = process(sec++, header, feat, fd, data);
2511 static const int attr_file_abi_sizes[] = {
2512 [0] = PERF_ATTR_SIZE_VER0,
2513 [1] = PERF_ATTR_SIZE_VER1,
2514 [2] = PERF_ATTR_SIZE_VER2,
2515 [3] = PERF_ATTR_SIZE_VER3,
2516 [4] = PERF_ATTR_SIZE_VER4,
2521 * In the legacy file format, the magic number is not used to encode endianness.
2522 * hdr_sz was used to encode endianness. But given that hdr_sz can vary based
2523 * on ABI revisions, we need to try all combinations for all endianness to
2524 * detect the endianness.
2526 static int try_all_file_abis(uint64_t hdr_sz, struct perf_header *ph)
2528 uint64_t ref_size, attr_size;
2531 for (i = 0 ; attr_file_abi_sizes[i]; i++) {
2532 ref_size = attr_file_abi_sizes[i]
2533 + sizeof(struct perf_file_section);
2534 if (hdr_sz != ref_size) {
2535 attr_size = bswap_64(hdr_sz);
2536 if (attr_size != ref_size)
2539 ph->needs_swap = true;
2541 pr_debug("ABI%d perf.data file detected, need_swap=%d\n",
2546 /* could not determine endianness */
2550 #define PERF_PIPE_HDR_VER0 16
2552 static const size_t attr_pipe_abi_sizes[] = {
2553 [0] = PERF_PIPE_HDR_VER0,
2558 * In the legacy pipe format, there is an implicit assumption that endiannesss
2559 * between host recording the samples, and host parsing the samples is the
2560 * same. This is not always the case given that the pipe output may always be
2561 * redirected into a file and analyzed on a different machine with possibly a
2562 * different endianness and perf_event ABI revsions in the perf tool itself.
2564 static int try_all_pipe_abis(uint64_t hdr_sz, struct perf_header *ph)
2569 for (i = 0 ; attr_pipe_abi_sizes[i]; i++) {
2570 if (hdr_sz != attr_pipe_abi_sizes[i]) {
2571 attr_size = bswap_64(hdr_sz);
2572 if (attr_size != hdr_sz)
2575 ph->needs_swap = true;
2577 pr_debug("Pipe ABI%d perf.data file detected\n", i);
2583 bool is_perf_magic(u64 magic)
2585 if (!memcmp(&magic, __perf_magic1, sizeof(magic))
2586 || magic == __perf_magic2
2587 || magic == __perf_magic2_sw)
2593 static int check_magic_endian(u64 magic, uint64_t hdr_sz,
2594 bool is_pipe, struct perf_header *ph)
2598 /* check for legacy format */
2599 ret = memcmp(&magic, __perf_magic1, sizeof(magic));
2601 ph->version = PERF_HEADER_VERSION_1;
2602 pr_debug("legacy perf.data format\n");
2604 return try_all_pipe_abis(hdr_sz, ph);
2606 return try_all_file_abis(hdr_sz, ph);
2609 * the new magic number serves two purposes:
2610 * - unique number to identify actual perf.data files
2611 * - encode endianness of file
2613 ph->version = PERF_HEADER_VERSION_2;
2615 /* check magic number with one endianness */
2616 if (magic == __perf_magic2)
2619 /* check magic number with opposite endianness */
2620 if (magic != __perf_magic2_sw)
2623 ph->needs_swap = true;
2628 int perf_file_header__read(struct perf_file_header *header,
2629 struct perf_header *ph, int fd)
2633 lseek(fd, 0, SEEK_SET);
2635 ret = readn(fd, header, sizeof(*header));
2639 if (check_magic_endian(header->magic,
2640 header->attr_size, false, ph) < 0) {
2641 pr_debug("magic/endian check failed\n");
2645 if (ph->needs_swap) {
2646 mem_bswap_64(header, offsetof(struct perf_file_header,
2650 if (header->size != sizeof(*header)) {
2651 /* Support the previous format */
2652 if (header->size == offsetof(typeof(*header), adds_features))
2653 bitmap_zero(header->adds_features, HEADER_FEAT_BITS);
2656 } else if (ph->needs_swap) {
2658 * feature bitmap is declared as an array of unsigned longs --
2659 * not good since its size can differ between the host that
2660 * generated the data file and the host analyzing the file.
2662 * We need to handle endianness, but we don't know the size of
2663 * the unsigned long where the file was generated. Take a best
2664 * guess at determining it: try 64-bit swap first (ie., file
2665 * created on a 64-bit host), and check if the hostname feature
2666 * bit is set (this feature bit is forced on as of fbe96f2).
2667 * If the bit is not, undo the 64-bit swap and try a 32-bit
2668 * swap. If the hostname bit is still not set (e.g., older data
2669 * file), punt and fallback to the original behavior --
2670 * clearing all feature bits and setting buildid.
2672 mem_bswap_64(&header->adds_features,
2673 BITS_TO_U64(HEADER_FEAT_BITS));
2675 if (!test_bit(HEADER_HOSTNAME, header->adds_features)) {
2677 mem_bswap_64(&header->adds_features,
2678 BITS_TO_U64(HEADER_FEAT_BITS));
2681 mem_bswap_32(&header->adds_features,
2682 BITS_TO_U32(HEADER_FEAT_BITS));
2685 if (!test_bit(HEADER_HOSTNAME, header->adds_features)) {
2686 bitmap_zero(header->adds_features, HEADER_FEAT_BITS);
2687 set_bit(HEADER_BUILD_ID, header->adds_features);
2691 memcpy(&ph->adds_features, &header->adds_features,
2692 sizeof(ph->adds_features));
2694 ph->data_offset = header->data.offset;
2695 ph->data_size = header->data.size;
2696 ph->feat_offset = header->data.offset + header->data.size;
2700 static int perf_file_section__process(struct perf_file_section *section,
2701 struct perf_header *ph,
2702 int feat, int fd, void *data)
2704 if (lseek(fd, section->offset, SEEK_SET) == (off_t)-1) {
2705 pr_debug("Failed to lseek to %" PRIu64 " offset for feature "
2706 "%d, continuing...\n", section->offset, feat);
2710 if (feat >= HEADER_LAST_FEATURE) {
2711 pr_debug("unknown feature %d, continuing...\n", feat);
2715 if (!feat_ops[feat].process)
2718 return feat_ops[feat].process(section, ph, fd, data);
2721 static int perf_file_header__read_pipe(struct perf_pipe_file_header *header,
2722 struct perf_header *ph, int fd,
2727 ret = readn(fd, header, sizeof(*header));
2731 if (check_magic_endian(header->magic, header->size, true, ph) < 0) {
2732 pr_debug("endian/magic failed\n");
2737 header->size = bswap_64(header->size);
2739 if (repipe && do_write(STDOUT_FILENO, header, sizeof(*header)) < 0)
2745 static int perf_header__read_pipe(struct perf_session *session)
2747 struct perf_header *header = &session->header;
2748 struct perf_pipe_file_header f_header;
2750 if (perf_file_header__read_pipe(&f_header, header,
2751 perf_data_file__fd(session->file),
2752 session->repipe) < 0) {
2753 pr_debug("incompatible file format\n");
2760 static int read_attr(int fd, struct perf_header *ph,
2761 struct perf_file_attr *f_attr)
2763 struct perf_event_attr *attr = &f_attr->attr;
2765 size_t our_sz = sizeof(f_attr->attr);
2768 memset(f_attr, 0, sizeof(*f_attr));
2770 /* read minimal guaranteed structure */
2771 ret = readn(fd, attr, PERF_ATTR_SIZE_VER0);
2773 pr_debug("cannot read %d bytes of header attr\n",
2774 PERF_ATTR_SIZE_VER0);
2778 /* on file perf_event_attr size */
2786 sz = PERF_ATTR_SIZE_VER0;
2787 } else if (sz > our_sz) {
2788 pr_debug("file uses a more recent and unsupported ABI"
2789 " (%zu bytes extra)\n", sz - our_sz);
2792 /* what we have not yet read and that we know about */
2793 left = sz - PERF_ATTR_SIZE_VER0;
2796 ptr += PERF_ATTR_SIZE_VER0;
2798 ret = readn(fd, ptr, left);
2800 /* read perf_file_section, ids are read in caller */
2801 ret = readn(fd, &f_attr->ids, sizeof(f_attr->ids));
2803 return ret <= 0 ? -1 : 0;
2806 static int perf_evsel__prepare_tracepoint_event(struct perf_evsel *evsel,
2807 struct pevent *pevent)
2809 struct event_format *event;
2812 /* already prepared */
2813 if (evsel->tp_format)
2816 if (pevent == NULL) {
2817 pr_debug("broken or missing trace data\n");
2821 event = pevent_find_event(pevent, evsel->attr.config);
2822 if (event == NULL) {
2823 pr_debug("cannot find event format for %d\n", (int)evsel->attr.config);
2828 snprintf(bf, sizeof(bf), "%s:%s", event->system, event->name);
2829 evsel->name = strdup(bf);
2830 if (evsel->name == NULL)
2834 evsel->tp_format = event;
2838 static int perf_evlist__prepare_tracepoint_events(struct perf_evlist *evlist,
2839 struct pevent *pevent)
2841 struct perf_evsel *pos;
2843 evlist__for_each_entry(evlist, pos) {
2844 if (pos->attr.type == PERF_TYPE_TRACEPOINT &&
2845 perf_evsel__prepare_tracepoint_event(pos, pevent))
2852 int perf_session__read_header(struct perf_session *session)
2854 struct perf_data_file *file = session->file;
2855 struct perf_header *header = &session->header;
2856 struct perf_file_header f_header;
2857 struct perf_file_attr f_attr;
2859 int nr_attrs, nr_ids, i, j;
2860 int fd = perf_data_file__fd(file);
2862 session->evlist = perf_evlist__new();
2863 if (session->evlist == NULL)
2866 session->evlist->env = &header->env;
2867 session->machines.host.env = &header->env;
2868 if (perf_data_file__is_pipe(file))
2869 return perf_header__read_pipe(session);
2871 if (perf_file_header__read(&f_header, header, fd) < 0)
2875 * Sanity check that perf.data was written cleanly; data size is
2876 * initialized to 0 and updated only if the on_exit function is run.
2877 * If data size is still 0 then the file contains only partial
2878 * information. Just warn user and process it as much as it can.
2880 if (f_header.data.size == 0) {
2881 pr_warning("WARNING: The %s file's data size field is 0 which is unexpected.\n"
2882 "Was the 'perf record' command properly terminated?\n",
2886 nr_attrs = f_header.attrs.size / f_header.attr_size;
2887 lseek(fd, f_header.attrs.offset, SEEK_SET);
2889 for (i = 0; i < nr_attrs; i++) {
2890 struct perf_evsel *evsel;
2893 if (read_attr(fd, header, &f_attr) < 0)
2896 if (header->needs_swap) {
2897 f_attr.ids.size = bswap_64(f_attr.ids.size);
2898 f_attr.ids.offset = bswap_64(f_attr.ids.offset);
2899 perf_event__attr_swap(&f_attr.attr);
2902 tmp = lseek(fd, 0, SEEK_CUR);
2903 evsel = perf_evsel__new(&f_attr.attr);
2906 goto out_delete_evlist;
2908 evsel->needs_swap = header->needs_swap;
2910 * Do it before so that if perf_evsel__alloc_id fails, this
2911 * entry gets purged too at perf_evlist__delete().
2913 perf_evlist__add(session->evlist, evsel);
2915 nr_ids = f_attr.ids.size / sizeof(u64);
2917 * We don't have the cpu and thread maps on the header, so
2918 * for allocating the perf_sample_id table we fake 1 cpu and
2919 * hattr->ids threads.
2921 if (perf_evsel__alloc_id(evsel, 1, nr_ids))
2922 goto out_delete_evlist;
2924 lseek(fd, f_attr.ids.offset, SEEK_SET);
2926 for (j = 0; j < nr_ids; j++) {
2927 if (perf_header__getbuffer64(header, fd, &f_id, sizeof(f_id)))
2930 perf_evlist__id_add(session->evlist, evsel, 0, j, f_id);
2933 lseek(fd, tmp, SEEK_SET);
2936 symbol_conf.nr_events = nr_attrs;
2938 perf_header__process_sections(header, fd, &session->tevent,
2939 perf_file_section__process);
2941 if (perf_evlist__prepare_tracepoint_events(session->evlist,
2942 session->tevent.pevent))
2943 goto out_delete_evlist;
2950 perf_evlist__delete(session->evlist);
2951 session->evlist = NULL;
2955 int perf_event__synthesize_attr(struct perf_tool *tool,
2956 struct perf_event_attr *attr, u32 ids, u64 *id,
2957 perf_event__handler_t process)
2959 union perf_event *ev;
2963 size = sizeof(struct perf_event_attr);
2964 size = PERF_ALIGN(size, sizeof(u64));
2965 size += sizeof(struct perf_event_header);
2966 size += ids * sizeof(u64);
2973 ev->attr.attr = *attr;
2974 memcpy(ev->attr.id, id, ids * sizeof(u64));
2976 ev->attr.header.type = PERF_RECORD_HEADER_ATTR;
2977 ev->attr.header.size = (u16)size;
2979 if (ev->attr.header.size == size)
2980 err = process(tool, ev, NULL, NULL);
2989 static struct event_update_event *
2990 event_update_event__new(size_t size, u64 type, u64 id)
2992 struct event_update_event *ev;
2994 size += sizeof(*ev);
2995 size = PERF_ALIGN(size, sizeof(u64));
2999 ev->header.type = PERF_RECORD_EVENT_UPDATE;
3000 ev->header.size = (u16)size;
3008 perf_event__synthesize_event_update_unit(struct perf_tool *tool,
3009 struct perf_evsel *evsel,
3010 perf_event__handler_t process)
3012 struct event_update_event *ev;
3013 size_t size = strlen(evsel->unit);
3016 ev = event_update_event__new(size + 1, PERF_EVENT_UPDATE__UNIT, evsel->id[0]);
3020 strncpy(ev->data, evsel->unit, size);
3021 err = process(tool, (union perf_event *)ev, NULL, NULL);
3027 perf_event__synthesize_event_update_scale(struct perf_tool *tool,
3028 struct perf_evsel *evsel,
3029 perf_event__handler_t process)
3031 struct event_update_event *ev;
3032 struct event_update_event_scale *ev_data;
3035 ev = event_update_event__new(sizeof(*ev_data), PERF_EVENT_UPDATE__SCALE, evsel->id[0]);
3039 ev_data = (struct event_update_event_scale *) ev->data;
3040 ev_data->scale = evsel->scale;
3041 err = process(tool, (union perf_event*) ev, NULL, NULL);
3047 perf_event__synthesize_event_update_name(struct perf_tool *tool,
3048 struct perf_evsel *evsel,
3049 perf_event__handler_t process)
3051 struct event_update_event *ev;
3052 size_t len = strlen(evsel->name);
3055 ev = event_update_event__new(len + 1, PERF_EVENT_UPDATE__NAME, evsel->id[0]);
3059 strncpy(ev->data, evsel->name, len);
3060 err = process(tool, (union perf_event*) ev, NULL, NULL);
3066 perf_event__synthesize_event_update_cpus(struct perf_tool *tool,
3067 struct perf_evsel *evsel,
3068 perf_event__handler_t process)
3070 size_t size = sizeof(struct event_update_event);
3071 struct event_update_event *ev;
3075 if (!evsel->own_cpus)
3078 ev = cpu_map_data__alloc(evsel->own_cpus, &size, &type, &max);
3082 ev->header.type = PERF_RECORD_EVENT_UPDATE;
3083 ev->header.size = (u16)size;
3084 ev->type = PERF_EVENT_UPDATE__CPUS;
3085 ev->id = evsel->id[0];
3087 cpu_map_data__synthesize((struct cpu_map_data *) ev->data,
3091 err = process(tool, (union perf_event*) ev, NULL, NULL);
3096 size_t perf_event__fprintf_event_update(union perf_event *event, FILE *fp)
3098 struct event_update_event *ev = &event->event_update;
3099 struct event_update_event_scale *ev_scale;
3100 struct event_update_event_cpus *ev_cpus;
3101 struct cpu_map *map;
3104 ret = fprintf(fp, "\n... id: %" PRIu64 "\n", ev->id);
3107 case PERF_EVENT_UPDATE__SCALE:
3108 ev_scale = (struct event_update_event_scale *) ev->data;
3109 ret += fprintf(fp, "... scale: %f\n", ev_scale->scale);
3111 case PERF_EVENT_UPDATE__UNIT:
3112 ret += fprintf(fp, "... unit: %s\n", ev->data);
3114 case PERF_EVENT_UPDATE__NAME:
3115 ret += fprintf(fp, "... name: %s\n", ev->data);
3117 case PERF_EVENT_UPDATE__CPUS:
3118 ev_cpus = (struct event_update_event_cpus *) ev->data;
3119 ret += fprintf(fp, "... ");
3121 map = cpu_map__new_data(&ev_cpus->cpus);
3123 ret += cpu_map__fprintf(map, fp);
3125 ret += fprintf(fp, "failed to get cpus\n");
3128 ret += fprintf(fp, "... unknown type\n");
3135 int perf_event__synthesize_attrs(struct perf_tool *tool,
3136 struct perf_session *session,
3137 perf_event__handler_t process)
3139 struct perf_evsel *evsel;
3142 evlist__for_each_entry(session->evlist, evsel) {
3143 err = perf_event__synthesize_attr(tool, &evsel->attr, evsel->ids,
3144 evsel->id, process);
3146 pr_debug("failed to create perf header attribute\n");
3154 int perf_event__process_attr(struct perf_tool *tool __maybe_unused,
3155 union perf_event *event,
3156 struct perf_evlist **pevlist)
3159 struct perf_evsel *evsel;
3160 struct perf_evlist *evlist = *pevlist;
3162 if (evlist == NULL) {
3163 *pevlist = evlist = perf_evlist__new();
3168 evsel = perf_evsel__new(&event->attr.attr);
3172 perf_evlist__add(evlist, evsel);
3174 ids = event->header.size;
3175 ids -= (void *)&event->attr.id - (void *)event;
3176 n_ids = ids / sizeof(u64);
3178 * We don't have the cpu and thread maps on the header, so
3179 * for allocating the perf_sample_id table we fake 1 cpu and
3180 * hattr->ids threads.
3182 if (perf_evsel__alloc_id(evsel, 1, n_ids))
3185 for (i = 0; i < n_ids; i++) {
3186 perf_evlist__id_add(evlist, evsel, 0, i, event->attr.id[i]);
3189 symbol_conf.nr_events = evlist->nr_entries;
3194 int perf_event__process_event_update(struct perf_tool *tool __maybe_unused,
3195 union perf_event *event,
3196 struct perf_evlist **pevlist)
3198 struct event_update_event *ev = &event->event_update;
3199 struct event_update_event_scale *ev_scale;
3200 struct event_update_event_cpus *ev_cpus;
3201 struct perf_evlist *evlist;
3202 struct perf_evsel *evsel;
3203 struct cpu_map *map;
3205 if (!pevlist || *pevlist == NULL)
3210 evsel = perf_evlist__id2evsel(evlist, ev->id);
3215 case PERF_EVENT_UPDATE__UNIT:
3216 evsel->unit = strdup(ev->data);
3218 case PERF_EVENT_UPDATE__NAME:
3219 evsel->name = strdup(ev->data);
3221 case PERF_EVENT_UPDATE__SCALE:
3222 ev_scale = (struct event_update_event_scale *) ev->data;
3223 evsel->scale = ev_scale->scale;
3225 case PERF_EVENT_UPDATE__CPUS:
3226 ev_cpus = (struct event_update_event_cpus *) ev->data;
3228 map = cpu_map__new_data(&ev_cpus->cpus);
3230 evsel->own_cpus = map;
3232 pr_err("failed to get event_update cpus\n");
3240 int perf_event__synthesize_tracing_data(struct perf_tool *tool, int fd,
3241 struct perf_evlist *evlist,
3242 perf_event__handler_t process)
3244 union perf_event ev;
3245 struct tracing_data *tdata;
3246 ssize_t size = 0, aligned_size = 0, padding;
3247 int err __maybe_unused = 0;
3250 * We are going to store the size of the data followed
3251 * by the data contents. Since the fd descriptor is a pipe,
3252 * we cannot seek back to store the size of the data once
3253 * we know it. Instead we:
3255 * - write the tracing data to the temp file
3256 * - get/write the data size to pipe
3257 * - write the tracing data from the temp file
3260 tdata = tracing_data_get(&evlist->entries, fd, true);
3264 memset(&ev, 0, sizeof(ev));
3266 ev.tracing_data.header.type = PERF_RECORD_HEADER_TRACING_DATA;
3268 aligned_size = PERF_ALIGN(size, sizeof(u64));
3269 padding = aligned_size - size;
3270 ev.tracing_data.header.size = sizeof(ev.tracing_data);
3271 ev.tracing_data.size = aligned_size;
3273 process(tool, &ev, NULL, NULL);
3276 * The put function will copy all the tracing data
3277 * stored in temp file to the pipe.
3279 tracing_data_put(tdata);
3281 write_padded(fd, NULL, 0, padding);
3283 return aligned_size;
3286 int perf_event__process_tracing_data(struct perf_tool *tool __maybe_unused,
3287 union perf_event *event,
3288 struct perf_session *session)
3290 ssize_t size_read, padding, size = event->tracing_data.size;
3291 int fd = perf_data_file__fd(session->file);
3292 off_t offset = lseek(fd, 0, SEEK_CUR);
3295 /* setup for reading amidst mmap */
3296 lseek(fd, offset + sizeof(struct tracing_data_event),
3299 size_read = trace_report(fd, &session->tevent,
3301 padding = PERF_ALIGN(size_read, sizeof(u64)) - size_read;
3303 if (readn(fd, buf, padding) < 0) {
3304 pr_err("%s: reading input file", __func__);
3307 if (session->repipe) {
3308 int retw = write(STDOUT_FILENO, buf, padding);
3309 if (retw <= 0 || retw != padding) {
3310 pr_err("%s: repiping tracing data padding", __func__);
3315 if (size_read + padding != size) {
3316 pr_err("%s: tracing data size mismatch", __func__);
3320 perf_evlist__prepare_tracepoint_events(session->evlist,
3321 session->tevent.pevent);
3323 return size_read + padding;
3326 int perf_event__synthesize_build_id(struct perf_tool *tool,
3327 struct dso *pos, u16 misc,
3328 perf_event__handler_t process,
3329 struct machine *machine)
3331 union perf_event ev;
3338 memset(&ev, 0, sizeof(ev));
3340 len = pos->long_name_len + 1;
3341 len = PERF_ALIGN(len, NAME_ALIGN);
3342 memcpy(&ev.build_id.build_id, pos->build_id, sizeof(pos->build_id));
3343 ev.build_id.header.type = PERF_RECORD_HEADER_BUILD_ID;
3344 ev.build_id.header.misc = misc;
3345 ev.build_id.pid = machine->pid;
3346 ev.build_id.header.size = sizeof(ev.build_id) + len;
3347 memcpy(&ev.build_id.filename, pos->long_name, pos->long_name_len);
3349 err = process(tool, &ev, NULL, machine);
3354 int perf_event__process_build_id(struct perf_tool *tool __maybe_unused,
3355 union perf_event *event,
3356 struct perf_session *session)
3358 __event_process_build_id(&event->build_id,
3359 event->build_id.filename,