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>
23 #include "trace-event.h"
33 #include <api/fs/fs.h>
36 #include "sane_ctype.h"
40 * must be a numerical value to let the endianness
41 * determine the memory layout. That way we are able
42 * to detect endianness when reading the perf.data file
45 * we check for legacy (PERFFILE) format.
47 static const char *__perf_magic1 = "PERFFILE";
48 static const u64 __perf_magic2 = 0x32454c4946524550ULL;
49 static const u64 __perf_magic2_sw = 0x50455246494c4532ULL;
51 #define PERF_MAGIC __perf_magic2
53 const char perf_version_string[] = PERF_VERSION;
55 struct perf_file_attr {
56 struct perf_event_attr attr;
57 struct perf_file_section ids;
60 void perf_header__set_feat(struct perf_header *header, int feat)
62 set_bit(feat, header->adds_features);
65 void perf_header__clear_feat(struct perf_header *header, int feat)
67 clear_bit(feat, header->adds_features);
70 bool perf_header__has_feat(const struct perf_header *header, int feat)
72 return test_bit(feat, header->adds_features);
75 static int do_write(int fd, const void *buf, size_t size)
78 int ret = write(fd, buf, size);
90 int write_padded(int fd, const void *bf, size_t count, size_t count_aligned)
92 static const char zero_buf[NAME_ALIGN];
93 int err = do_write(fd, bf, count);
96 err = do_write(fd, zero_buf, count_aligned - count);
101 #define string_size(str) \
102 (PERF_ALIGN((strlen(str) + 1), NAME_ALIGN) + sizeof(u32))
104 static int do_write_string(int fd, const char *str)
109 olen = strlen(str) + 1;
110 len = PERF_ALIGN(olen, NAME_ALIGN);
112 /* write len, incl. \0 */
113 ret = do_write(fd, &len, sizeof(len));
117 return write_padded(fd, str, olen, len);
120 static char *do_read_string(int fd, struct perf_header *ph)
126 sz = readn(fd, &len, sizeof(len));
127 if (sz < (ssize_t)sizeof(len))
137 ret = readn(fd, buf, len);
138 if (ret == (ssize_t)len) {
140 * strings are padded by zeroes
141 * thus the actual strlen of buf
142 * may be less than len
151 static int write_tracing_data(int fd, struct perf_header *h __maybe_unused,
152 struct perf_evlist *evlist)
154 return read_tracing_data(fd, &evlist->entries);
158 static int write_build_id(int fd, struct perf_header *h,
159 struct perf_evlist *evlist __maybe_unused)
161 struct perf_session *session;
164 session = container_of(h, struct perf_session, header);
166 if (!perf_session__read_build_ids(session, true))
169 err = perf_session__write_buildid_table(session, fd);
171 pr_debug("failed to write buildid table\n");
174 perf_session__cache_build_ids(session);
179 static int write_hostname(int fd, struct perf_header *h __maybe_unused,
180 struct perf_evlist *evlist __maybe_unused)
189 return do_write_string(fd, uts.nodename);
192 static int write_osrelease(int fd, struct perf_header *h __maybe_unused,
193 struct perf_evlist *evlist __maybe_unused)
202 return do_write_string(fd, uts.release);
205 static int write_arch(int fd, struct perf_header *h __maybe_unused,
206 struct perf_evlist *evlist __maybe_unused)
215 return do_write_string(fd, uts.machine);
218 static int write_version(int fd, struct perf_header *h __maybe_unused,
219 struct perf_evlist *evlist __maybe_unused)
221 return do_write_string(fd, perf_version_string);
224 static int __write_cpudesc(int fd, const char *cpuinfo_proc)
229 const char *search = cpuinfo_proc;
236 file = fopen("/proc/cpuinfo", "r");
240 while (getline(&buf, &len, file) > 0) {
241 ret = strncmp(buf, search, strlen(search));
253 p = strchr(buf, ':');
254 if (p && *(p+1) == ' ' && *(p+2))
260 /* squash extra space characters (branding string) */
267 while (*q && isspace(*q))
270 while ((*r++ = *q++));
274 ret = do_write_string(fd, s);
281 static int write_cpudesc(int fd, struct perf_header *h __maybe_unused,
282 struct perf_evlist *evlist __maybe_unused)
285 #define CPUINFO_PROC {"model name", }
287 const char *cpuinfo_procs[] = CPUINFO_PROC;
290 for (i = 0; i < ARRAY_SIZE(cpuinfo_procs); i++) {
292 ret = __write_cpudesc(fd, cpuinfo_procs[i]);
300 static int write_nrcpus(int fd, struct perf_header *h __maybe_unused,
301 struct perf_evlist *evlist __maybe_unused)
307 nrc = cpu__max_present_cpu();
309 nr = sysconf(_SC_NPROCESSORS_ONLN);
313 nra = (u32)(nr & UINT_MAX);
315 ret = do_write(fd, &nrc, sizeof(nrc));
319 return do_write(fd, &nra, sizeof(nra));
322 static int write_event_desc(int fd, struct perf_header *h __maybe_unused,
323 struct perf_evlist *evlist)
325 struct perf_evsel *evsel;
329 nre = evlist->nr_entries;
332 * write number of events
334 ret = do_write(fd, &nre, sizeof(nre));
339 * size of perf_event_attr struct
341 sz = (u32)sizeof(evsel->attr);
342 ret = do_write(fd, &sz, sizeof(sz));
346 evlist__for_each_entry(evlist, evsel) {
347 ret = do_write(fd, &evsel->attr, sz);
351 * write number of unique id per event
352 * there is one id per instance of an event
354 * copy into an nri to be independent of the
358 ret = do_write(fd, &nri, sizeof(nri));
363 * write event string as passed on cmdline
365 ret = do_write_string(fd, perf_evsel__name(evsel));
369 * write unique ids for this event
371 ret = do_write(fd, evsel->id, evsel->ids * sizeof(u64));
378 static int write_cmdline(int fd, struct perf_header *h __maybe_unused,
379 struct perf_evlist *evlist __maybe_unused)
381 char buf[MAXPATHLEN];
385 /* actual path to perf binary */
386 ret = readlink("/proc/self/exe", buf, sizeof(buf) - 1);
390 /* readlink() does not add null termination */
393 /* account for binary path */
394 n = perf_env.nr_cmdline + 1;
396 ret = do_write(fd, &n, sizeof(n));
400 ret = do_write_string(fd, buf);
404 for (i = 0 ; i < perf_env.nr_cmdline; i++) {
405 ret = do_write_string(fd, perf_env.cmdline_argv[i]);
412 #define CORE_SIB_FMT \
413 "/sys/devices/system/cpu/cpu%d/topology/core_siblings_list"
414 #define THRD_SIB_FMT \
415 "/sys/devices/system/cpu/cpu%d/topology/thread_siblings_list"
421 char **core_siblings;
422 char **thread_siblings;
425 static int build_cpu_topo(struct cpu_topo *tp, int cpu)
428 char filename[MAXPATHLEN];
429 char *buf = NULL, *p;
435 sprintf(filename, CORE_SIB_FMT, cpu);
436 fp = fopen(filename, "r");
440 sret = getline(&buf, &len, fp);
445 p = strchr(buf, '\n');
449 for (i = 0; i < tp->core_sib; i++) {
450 if (!strcmp(buf, tp->core_siblings[i]))
453 if (i == tp->core_sib) {
454 tp->core_siblings[i] = buf;
462 sprintf(filename, THRD_SIB_FMT, cpu);
463 fp = fopen(filename, "r");
467 if (getline(&buf, &len, fp) <= 0)
470 p = strchr(buf, '\n');
474 for (i = 0; i < tp->thread_sib; i++) {
475 if (!strcmp(buf, tp->thread_siblings[i]))
478 if (i == tp->thread_sib) {
479 tp->thread_siblings[i] = buf;
491 static void free_cpu_topo(struct cpu_topo *tp)
498 for (i = 0 ; i < tp->core_sib; i++)
499 zfree(&tp->core_siblings[i]);
501 for (i = 0 ; i < tp->thread_sib; i++)
502 zfree(&tp->thread_siblings[i]);
507 static struct cpu_topo *build_cpu_topology(void)
509 struct cpu_topo *tp = NULL;
517 ncpus = cpu__max_present_cpu();
519 /* build online CPU map */
520 map = cpu_map__new(NULL);
522 pr_debug("failed to get system cpumap\n");
526 nr = (u32)(ncpus & UINT_MAX);
528 sz = nr * sizeof(char *);
529 addr = calloc(1, sizeof(*tp) + 2 * sz);
536 tp->core_siblings = addr;
538 tp->thread_siblings = addr;
540 for (i = 0; i < nr; i++) {
541 if (!cpu_map__has(map, i))
544 ret = build_cpu_topo(tp, i);
558 static int write_cpu_topology(int fd, struct perf_header *h __maybe_unused,
559 struct perf_evlist *evlist __maybe_unused)
565 tp = build_cpu_topology();
569 ret = do_write(fd, &tp->core_sib, sizeof(tp->core_sib));
573 for (i = 0; i < tp->core_sib; i++) {
574 ret = do_write_string(fd, tp->core_siblings[i]);
578 ret = do_write(fd, &tp->thread_sib, sizeof(tp->thread_sib));
582 for (i = 0; i < tp->thread_sib; i++) {
583 ret = do_write_string(fd, tp->thread_siblings[i]);
588 ret = perf_env__read_cpu_topology_map(&perf_env);
592 for (j = 0; j < perf_env.nr_cpus_avail; j++) {
593 ret = do_write(fd, &perf_env.cpu[j].core_id,
594 sizeof(perf_env.cpu[j].core_id));
597 ret = do_write(fd, &perf_env.cpu[j].socket_id,
598 sizeof(perf_env.cpu[j].socket_id));
609 static int write_total_mem(int fd, struct perf_header *h __maybe_unused,
610 struct perf_evlist *evlist __maybe_unused)
618 fp = fopen("/proc/meminfo", "r");
622 while (getline(&buf, &len, fp) > 0) {
623 ret = strncmp(buf, "MemTotal:", 9);
628 n = sscanf(buf, "%*s %"PRIu64, &mem);
630 ret = do_write(fd, &mem, sizeof(mem));
638 static int write_topo_node(int fd, int node)
640 char str[MAXPATHLEN];
642 char *buf = NULL, *p;
645 u64 mem_total, mem_free, mem;
648 sprintf(str, "/sys/devices/system/node/node%d/meminfo", node);
649 fp = fopen(str, "r");
653 while (getline(&buf, &len, fp) > 0) {
654 /* skip over invalid lines */
655 if (!strchr(buf, ':'))
657 if (sscanf(buf, "%*s %*d %31s %"PRIu64, field, &mem) != 2)
659 if (!strcmp(field, "MemTotal:"))
661 if (!strcmp(field, "MemFree:"))
668 ret = do_write(fd, &mem_total, sizeof(u64));
672 ret = do_write(fd, &mem_free, sizeof(u64));
677 sprintf(str, "/sys/devices/system/node/node%d/cpulist", node);
679 fp = fopen(str, "r");
683 if (getline(&buf, &len, fp) <= 0)
686 p = strchr(buf, '\n');
690 ret = do_write_string(fd, buf);
698 static int write_numa_topology(int fd, struct perf_header *h __maybe_unused,
699 struct perf_evlist *evlist __maybe_unused)
704 struct cpu_map *node_map = NULL;
709 fp = fopen("/sys/devices/system/node/online", "r");
713 if (getline(&buf, &len, fp) <= 0)
716 c = strchr(buf, '\n');
720 node_map = cpu_map__new(buf);
724 nr = (u32)node_map->nr;
726 ret = do_write(fd, &nr, sizeof(nr));
730 for (i = 0; i < nr; i++) {
731 j = (u32)node_map->map[i];
732 ret = do_write(fd, &j, sizeof(j));
736 ret = write_topo_node(fd, i);
743 cpu_map__put(node_map);
750 * struct pmu_mappings {
759 static int write_pmu_mappings(int fd, struct perf_header *h __maybe_unused,
760 struct perf_evlist *evlist __maybe_unused)
762 struct perf_pmu *pmu = NULL;
763 off_t offset = lseek(fd, 0, SEEK_CUR);
767 /* write real pmu_num later */
768 ret = do_write(fd, &pmu_num, sizeof(pmu_num));
772 while ((pmu = perf_pmu__scan(pmu))) {
777 ret = do_write(fd, &pmu->type, sizeof(pmu->type));
781 ret = do_write_string(fd, pmu->name);
786 if (pwrite(fd, &pmu_num, sizeof(pmu_num), offset) != sizeof(pmu_num)) {
788 lseek(fd, offset, SEEK_SET);
798 * struct group_descs {
800 * struct group_desc {
807 static int write_group_desc(int fd, struct perf_header *h __maybe_unused,
808 struct perf_evlist *evlist)
810 u32 nr_groups = evlist->nr_groups;
811 struct perf_evsel *evsel;
814 ret = do_write(fd, &nr_groups, sizeof(nr_groups));
818 evlist__for_each_entry(evlist, evsel) {
819 if (perf_evsel__is_group_leader(evsel) &&
820 evsel->nr_members > 1) {
821 const char *name = evsel->group_name ?: "{anon_group}";
822 u32 leader_idx = evsel->idx;
823 u32 nr_members = evsel->nr_members;
825 ret = do_write_string(fd, name);
829 ret = do_write(fd, &leader_idx, sizeof(leader_idx));
833 ret = do_write(fd, &nr_members, sizeof(nr_members));
842 * default get_cpuid(): nothing gets recorded
843 * actual implementation must be in arch/$(ARCH)/util/header.c
845 int __weak get_cpuid(char *buffer __maybe_unused, size_t sz __maybe_unused)
850 static int write_cpuid(int fd, struct perf_header *h __maybe_unused,
851 struct perf_evlist *evlist __maybe_unused)
856 ret = get_cpuid(buffer, sizeof(buffer));
862 return do_write_string(fd, buffer);
865 static int write_branch_stack(int fd __maybe_unused,
866 struct perf_header *h __maybe_unused,
867 struct perf_evlist *evlist __maybe_unused)
872 static int write_auxtrace(int fd, struct perf_header *h,
873 struct perf_evlist *evlist __maybe_unused)
875 struct perf_session *session;
878 session = container_of(h, struct perf_session, header);
880 err = auxtrace_index__write(fd, &session->auxtrace_index);
882 pr_err("Failed to write auxtrace index\n");
886 static int cpu_cache_level__sort(const void *a, const void *b)
888 struct cpu_cache_level *cache_a = (struct cpu_cache_level *)a;
889 struct cpu_cache_level *cache_b = (struct cpu_cache_level *)b;
891 return cache_a->level - cache_b->level;
894 static bool cpu_cache_level__cmp(struct cpu_cache_level *a, struct cpu_cache_level *b)
896 if (a->level != b->level)
899 if (a->line_size != b->line_size)
902 if (a->sets != b->sets)
905 if (a->ways != b->ways)
908 if (strcmp(a->type, b->type))
911 if (strcmp(a->size, b->size))
914 if (strcmp(a->map, b->map))
920 static int cpu_cache_level__read(struct cpu_cache_level *cache, u32 cpu, u16 level)
922 char path[PATH_MAX], file[PATH_MAX];
926 scnprintf(path, PATH_MAX, "devices/system/cpu/cpu%d/cache/index%d/", cpu, level);
927 scnprintf(file, PATH_MAX, "%s/%s", sysfs__mountpoint(), path);
932 scnprintf(file, PATH_MAX, "%s/level", path);
933 if (sysfs__read_int(file, (int *) &cache->level))
936 scnprintf(file, PATH_MAX, "%s/coherency_line_size", path);
937 if (sysfs__read_int(file, (int *) &cache->line_size))
940 scnprintf(file, PATH_MAX, "%s/number_of_sets", path);
941 if (sysfs__read_int(file, (int *) &cache->sets))
944 scnprintf(file, PATH_MAX, "%s/ways_of_associativity", path);
945 if (sysfs__read_int(file, (int *) &cache->ways))
948 scnprintf(file, PATH_MAX, "%s/type", path);
949 if (sysfs__read_str(file, &cache->type, &len))
952 cache->type[len] = 0;
953 cache->type = rtrim(cache->type);
955 scnprintf(file, PATH_MAX, "%s/size", path);
956 if (sysfs__read_str(file, &cache->size, &len)) {
961 cache->size[len] = 0;
962 cache->size = rtrim(cache->size);
964 scnprintf(file, PATH_MAX, "%s/shared_cpu_list", path);
965 if (sysfs__read_str(file, &cache->map, &len)) {
972 cache->map = rtrim(cache->map);
976 static void cpu_cache_level__fprintf(FILE *out, struct cpu_cache_level *c)
978 fprintf(out, "L%d %-15s %8s [%s]\n", c->level, c->type, c->size, c->map);
981 static int build_caches(struct cpu_cache_level caches[], u32 size, u32 *cntp)
988 ncpus = sysconf(_SC_NPROCESSORS_CONF);
992 nr = (u32)(ncpus & UINT_MAX);
994 for (cpu = 0; cpu < nr; cpu++) {
995 for (level = 0; level < 10; level++) {
996 struct cpu_cache_level c;
999 err = cpu_cache_level__read(&c, cpu, level);
1006 for (i = 0; i < cnt; i++) {
1007 if (cpu_cache_level__cmp(&c, &caches[i]))
1014 cpu_cache_level__free(&c);
1016 if (WARN_ONCE(cnt == size, "way too many cpu caches.."))
1025 #define MAX_CACHES 2000
1027 static int write_cache(int fd, struct perf_header *h __maybe_unused,
1028 struct perf_evlist *evlist __maybe_unused)
1030 struct cpu_cache_level caches[MAX_CACHES];
1031 u32 cnt = 0, i, version = 1;
1034 ret = build_caches(caches, MAX_CACHES, &cnt);
1038 qsort(&caches, cnt, sizeof(struct cpu_cache_level), cpu_cache_level__sort);
1040 ret = do_write(fd, &version, sizeof(u32));
1044 ret = do_write(fd, &cnt, sizeof(u32));
1048 for (i = 0; i < cnt; i++) {
1049 struct cpu_cache_level *c = &caches[i];
1052 ret = do_write(fd, &c->v, sizeof(u32)); \
1063 ret = do_write_string(fd, (const char *) c->v); \
1074 for (i = 0; i < cnt; i++)
1075 cpu_cache_level__free(&caches[i]);
1079 static int write_stat(int fd __maybe_unused,
1080 struct perf_header *h __maybe_unused,
1081 struct perf_evlist *evlist __maybe_unused)
1086 static void print_hostname(struct perf_header *ph, int fd __maybe_unused,
1089 fprintf(fp, "# hostname : %s\n", ph->env.hostname);
1092 static void print_osrelease(struct perf_header *ph, int fd __maybe_unused,
1095 fprintf(fp, "# os release : %s\n", ph->env.os_release);
1098 static void print_arch(struct perf_header *ph, int fd __maybe_unused, FILE *fp)
1100 fprintf(fp, "# arch : %s\n", ph->env.arch);
1103 static void print_cpudesc(struct perf_header *ph, int fd __maybe_unused,
1106 fprintf(fp, "# cpudesc : %s\n", ph->env.cpu_desc);
1109 static void print_nrcpus(struct perf_header *ph, int fd __maybe_unused,
1112 fprintf(fp, "# nrcpus online : %u\n", ph->env.nr_cpus_online);
1113 fprintf(fp, "# nrcpus avail : %u\n", ph->env.nr_cpus_avail);
1116 static void print_version(struct perf_header *ph, int fd __maybe_unused,
1119 fprintf(fp, "# perf version : %s\n", ph->env.version);
1122 static void print_cmdline(struct perf_header *ph, int fd __maybe_unused,
1127 nr = ph->env.nr_cmdline;
1129 fprintf(fp, "# cmdline : ");
1131 for (i = 0; i < nr; i++)
1132 fprintf(fp, "%s ", ph->env.cmdline_argv[i]);
1136 static void print_cpu_topology(struct perf_header *ph, int fd __maybe_unused,
1141 int cpu_nr = ph->env.nr_cpus_avail;
1143 nr = ph->env.nr_sibling_cores;
1144 str = ph->env.sibling_cores;
1146 for (i = 0; i < nr; i++) {
1147 fprintf(fp, "# sibling cores : %s\n", str);
1148 str += strlen(str) + 1;
1151 nr = ph->env.nr_sibling_threads;
1152 str = ph->env.sibling_threads;
1154 for (i = 0; i < nr; i++) {
1155 fprintf(fp, "# sibling threads : %s\n", str);
1156 str += strlen(str) + 1;
1159 if (ph->env.cpu != NULL) {
1160 for (i = 0; i < cpu_nr; i++)
1161 fprintf(fp, "# CPU %d: Core ID %d, Socket ID %d\n", i,
1162 ph->env.cpu[i].core_id, ph->env.cpu[i].socket_id);
1164 fprintf(fp, "# Core ID and Socket ID information is not available\n");
1167 static void free_event_desc(struct perf_evsel *events)
1169 struct perf_evsel *evsel;
1174 for (evsel = events; evsel->attr.size; evsel++) {
1175 zfree(&evsel->name);
1182 static struct perf_evsel *
1183 read_event_desc(struct perf_header *ph, int fd)
1185 struct perf_evsel *evsel, *events = NULL;
1188 u32 nre, sz, nr, i, j;
1192 /* number of events */
1193 ret = readn(fd, &nre, sizeof(nre));
1194 if (ret != (ssize_t)sizeof(nre))
1198 nre = bswap_32(nre);
1200 ret = readn(fd, &sz, sizeof(sz));
1201 if (ret != (ssize_t)sizeof(sz))
1207 /* buffer to hold on file attr struct */
1212 /* the last event terminates with evsel->attr.size == 0: */
1213 events = calloc(nre + 1, sizeof(*events));
1217 msz = sizeof(evsel->attr);
1221 for (i = 0, evsel = events; i < nre; evsel++, i++) {
1225 * must read entire on-file attr struct to
1226 * sync up with layout.
1228 ret = readn(fd, buf, sz);
1229 if (ret != (ssize_t)sz)
1233 perf_event__attr_swap(buf);
1235 memcpy(&evsel->attr, buf, msz);
1237 ret = readn(fd, &nr, sizeof(nr));
1238 if (ret != (ssize_t)sizeof(nr))
1241 if (ph->needs_swap) {
1243 evsel->needs_swap = true;
1246 evsel->name = do_read_string(fd, ph);
1251 id = calloc(nr, sizeof(*id));
1257 for (j = 0 ; j < nr; j++) {
1258 ret = readn(fd, id, sizeof(*id));
1259 if (ret != (ssize_t)sizeof(*id))
1262 *id = bswap_64(*id);
1270 free_event_desc(events);
1275 static int __desc_attr__fprintf(FILE *fp, const char *name, const char *val,
1276 void *priv __attribute__((unused)))
1278 return fprintf(fp, ", %s = %s", name, val);
1281 static void print_event_desc(struct perf_header *ph, int fd, FILE *fp)
1283 struct perf_evsel *evsel, *events = read_event_desc(ph, fd);
1288 fprintf(fp, "# event desc: not available or unable to read\n");
1292 for (evsel = events; evsel->attr.size; evsel++) {
1293 fprintf(fp, "# event : name = %s, ", evsel->name);
1296 fprintf(fp, ", id = {");
1297 for (j = 0, id = evsel->id; j < evsel->ids; j++, id++) {
1300 fprintf(fp, " %"PRIu64, *id);
1305 perf_event_attr__fprintf(fp, &evsel->attr, __desc_attr__fprintf, NULL);
1310 free_event_desc(events);
1313 static void print_total_mem(struct perf_header *ph, int fd __maybe_unused,
1316 fprintf(fp, "# total memory : %Lu kB\n", ph->env.total_mem);
1319 static void print_numa_topology(struct perf_header *ph, int fd __maybe_unused,
1323 struct numa_node *n;
1325 for (i = 0; i < ph->env.nr_numa_nodes; i++) {
1326 n = &ph->env.numa_nodes[i];
1328 fprintf(fp, "# node%u meminfo : total = %"PRIu64" kB,"
1329 " free = %"PRIu64" kB\n",
1330 n->node, n->mem_total, n->mem_free);
1332 fprintf(fp, "# node%u cpu list : ", n->node);
1333 cpu_map__fprintf(n->map, fp);
1337 static void print_cpuid(struct perf_header *ph, int fd __maybe_unused, FILE *fp)
1339 fprintf(fp, "# cpuid : %s\n", ph->env.cpuid);
1342 static void print_branch_stack(struct perf_header *ph __maybe_unused,
1343 int fd __maybe_unused, FILE *fp)
1345 fprintf(fp, "# contains samples with branch stack\n");
1348 static void print_auxtrace(struct perf_header *ph __maybe_unused,
1349 int fd __maybe_unused, FILE *fp)
1351 fprintf(fp, "# contains AUX area data (e.g. instruction trace)\n");
1354 static void print_stat(struct perf_header *ph __maybe_unused,
1355 int fd __maybe_unused, FILE *fp)
1357 fprintf(fp, "# contains stat data\n");
1360 static void print_cache(struct perf_header *ph __maybe_unused,
1361 int fd __maybe_unused, FILE *fp __maybe_unused)
1365 fprintf(fp, "# CPU cache info:\n");
1366 for (i = 0; i < ph->env.caches_cnt; i++) {
1368 cpu_cache_level__fprintf(fp, &ph->env.caches[i]);
1372 static void print_pmu_mappings(struct perf_header *ph, int fd __maybe_unused,
1375 const char *delimiter = "# pmu mappings: ";
1380 pmu_num = ph->env.nr_pmu_mappings;
1382 fprintf(fp, "# pmu mappings: not available\n");
1386 str = ph->env.pmu_mappings;
1389 type = strtoul(str, &tmp, 0);
1394 fprintf(fp, "%s%s = %" PRIu32, delimiter, str, type);
1397 str += strlen(str) + 1;
1406 fprintf(fp, "# pmu mappings: unable to read\n");
1409 static void print_group_desc(struct perf_header *ph, int fd __maybe_unused,
1412 struct perf_session *session;
1413 struct perf_evsel *evsel;
1416 session = container_of(ph, struct perf_session, header);
1418 evlist__for_each_entry(session->evlist, evsel) {
1419 if (perf_evsel__is_group_leader(evsel) &&
1420 evsel->nr_members > 1) {
1421 fprintf(fp, "# group: %s{%s", evsel->group_name ?: "",
1422 perf_evsel__name(evsel));
1424 nr = evsel->nr_members - 1;
1426 fprintf(fp, ",%s", perf_evsel__name(evsel));
1434 static int __event_process_build_id(struct build_id_event *bev,
1436 struct perf_session *session)
1439 struct machine *machine;
1442 enum dso_kernel_type dso_type;
1444 machine = perf_session__findnew_machine(session, bev->pid);
1448 cpumode = bev->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
1451 case PERF_RECORD_MISC_KERNEL:
1452 dso_type = DSO_TYPE_KERNEL;
1454 case PERF_RECORD_MISC_GUEST_KERNEL:
1455 dso_type = DSO_TYPE_GUEST_KERNEL;
1457 case PERF_RECORD_MISC_USER:
1458 case PERF_RECORD_MISC_GUEST_USER:
1459 dso_type = DSO_TYPE_USER;
1465 dso = machine__findnew_dso(machine, filename);
1467 char sbuild_id[SBUILD_ID_SIZE];
1469 dso__set_build_id(dso, &bev->build_id);
1471 if (!is_kernel_module(filename, cpumode))
1472 dso->kernel = dso_type;
1474 build_id__sprintf(dso->build_id, sizeof(dso->build_id),
1476 pr_debug("build id event received for %s: %s\n",
1477 dso->long_name, sbuild_id);
1486 static int perf_header__read_build_ids_abi_quirk(struct perf_header *header,
1487 int input, u64 offset, u64 size)
1489 struct perf_session *session = container_of(header, struct perf_session, header);
1491 struct perf_event_header header;
1492 u8 build_id[PERF_ALIGN(BUILD_ID_SIZE, sizeof(u64))];
1495 struct build_id_event bev;
1496 char filename[PATH_MAX];
1497 u64 limit = offset + size;
1499 while (offset < limit) {
1502 if (readn(input, &old_bev, sizeof(old_bev)) != sizeof(old_bev))
1505 if (header->needs_swap)
1506 perf_event_header__bswap(&old_bev.header);
1508 len = old_bev.header.size - sizeof(old_bev);
1509 if (readn(input, filename, len) != len)
1512 bev.header = old_bev.header;
1515 * As the pid is the missing value, we need to fill
1516 * it properly. The header.misc value give us nice hint.
1518 bev.pid = HOST_KERNEL_ID;
1519 if (bev.header.misc == PERF_RECORD_MISC_GUEST_USER ||
1520 bev.header.misc == PERF_RECORD_MISC_GUEST_KERNEL)
1521 bev.pid = DEFAULT_GUEST_KERNEL_ID;
1523 memcpy(bev.build_id, old_bev.build_id, sizeof(bev.build_id));
1524 __event_process_build_id(&bev, filename, session);
1526 offset += bev.header.size;
1532 static int perf_header__read_build_ids(struct perf_header *header,
1533 int input, u64 offset, u64 size)
1535 struct perf_session *session = container_of(header, struct perf_session, header);
1536 struct build_id_event bev;
1537 char filename[PATH_MAX];
1538 u64 limit = offset + size, orig_offset = offset;
1541 while (offset < limit) {
1544 if (readn(input, &bev, sizeof(bev)) != sizeof(bev))
1547 if (header->needs_swap)
1548 perf_event_header__bswap(&bev.header);
1550 len = bev.header.size - sizeof(bev);
1551 if (readn(input, filename, len) != len)
1554 * The a1645ce1 changeset:
1556 * "perf: 'perf kvm' tool for monitoring guest performance from host"
1558 * Added a field to struct build_id_event that broke the file
1561 * Since the kernel build-id is the first entry, process the
1562 * table using the old format if the well known
1563 * '[kernel.kallsyms]' string for the kernel build-id has the
1564 * first 4 characters chopped off (where the pid_t sits).
1566 if (memcmp(filename, "nel.kallsyms]", 13) == 0) {
1567 if (lseek(input, orig_offset, SEEK_SET) == (off_t)-1)
1569 return perf_header__read_build_ids_abi_quirk(header, input, offset, size);
1572 __event_process_build_id(&bev, filename, session);
1574 offset += bev.header.size;
1581 static int process_tracing_data(struct perf_file_section *section __maybe_unused,
1582 struct perf_header *ph __maybe_unused,
1585 ssize_t ret = trace_report(fd, data, false);
1586 return ret < 0 ? -1 : 0;
1589 static int process_build_id(struct perf_file_section *section,
1590 struct perf_header *ph, int fd,
1591 void *data __maybe_unused)
1593 if (perf_header__read_build_ids(ph, fd, section->offset, section->size))
1594 pr_debug("Failed to read buildids, continuing...\n");
1598 static int process_hostname(struct perf_file_section *section __maybe_unused,
1599 struct perf_header *ph, int fd,
1600 void *data __maybe_unused)
1602 ph->env.hostname = do_read_string(fd, ph);
1603 return ph->env.hostname ? 0 : -ENOMEM;
1606 static int process_osrelease(struct perf_file_section *section __maybe_unused,
1607 struct perf_header *ph, int fd,
1608 void *data __maybe_unused)
1610 ph->env.os_release = do_read_string(fd, ph);
1611 return ph->env.os_release ? 0 : -ENOMEM;
1614 static int process_version(struct perf_file_section *section __maybe_unused,
1615 struct perf_header *ph, int fd,
1616 void *data __maybe_unused)
1618 ph->env.version = do_read_string(fd, ph);
1619 return ph->env.version ? 0 : -ENOMEM;
1622 static int process_arch(struct perf_file_section *section __maybe_unused,
1623 struct perf_header *ph, int fd,
1624 void *data __maybe_unused)
1626 ph->env.arch = do_read_string(fd, ph);
1627 return ph->env.arch ? 0 : -ENOMEM;
1630 static int process_nrcpus(struct perf_file_section *section __maybe_unused,
1631 struct perf_header *ph, int fd,
1632 void *data __maybe_unused)
1637 ret = readn(fd, &nr, sizeof(nr));
1638 if (ret != sizeof(nr))
1644 ph->env.nr_cpus_avail = nr;
1646 ret = readn(fd, &nr, sizeof(nr));
1647 if (ret != sizeof(nr))
1653 ph->env.nr_cpus_online = nr;
1657 static int process_cpudesc(struct perf_file_section *section __maybe_unused,
1658 struct perf_header *ph, int fd,
1659 void *data __maybe_unused)
1661 ph->env.cpu_desc = do_read_string(fd, ph);
1662 return ph->env.cpu_desc ? 0 : -ENOMEM;
1665 static int process_cpuid(struct perf_file_section *section __maybe_unused,
1666 struct perf_header *ph, int fd,
1667 void *data __maybe_unused)
1669 ph->env.cpuid = do_read_string(fd, ph);
1670 return ph->env.cpuid ? 0 : -ENOMEM;
1673 static int process_total_mem(struct perf_file_section *section __maybe_unused,
1674 struct perf_header *ph, int fd,
1675 void *data __maybe_unused)
1680 ret = readn(fd, &mem, sizeof(mem));
1681 if (ret != sizeof(mem))
1685 mem = bswap_64(mem);
1687 ph->env.total_mem = mem;
1691 static struct perf_evsel *
1692 perf_evlist__find_by_index(struct perf_evlist *evlist, int idx)
1694 struct perf_evsel *evsel;
1696 evlist__for_each_entry(evlist, evsel) {
1697 if (evsel->idx == idx)
1705 perf_evlist__set_event_name(struct perf_evlist *evlist,
1706 struct perf_evsel *event)
1708 struct perf_evsel *evsel;
1713 evsel = perf_evlist__find_by_index(evlist, event->idx);
1720 evsel->name = strdup(event->name);
1724 process_event_desc(struct perf_file_section *section __maybe_unused,
1725 struct perf_header *header, int fd,
1726 void *data __maybe_unused)
1728 struct perf_session *session;
1729 struct perf_evsel *evsel, *events = read_event_desc(header, fd);
1734 session = container_of(header, struct perf_session, header);
1735 for (evsel = events; evsel->attr.size; evsel++)
1736 perf_evlist__set_event_name(session->evlist, evsel);
1738 free_event_desc(events);
1743 static int process_cmdline(struct perf_file_section *section,
1744 struct perf_header *ph, int fd,
1745 void *data __maybe_unused)
1748 char *str, *cmdline = NULL, **argv = NULL;
1751 ret = readn(fd, &nr, sizeof(nr));
1752 if (ret != sizeof(nr))
1758 ph->env.nr_cmdline = nr;
1760 cmdline = zalloc(section->size + nr + 1);
1764 argv = zalloc(sizeof(char *) * (nr + 1));
1768 for (i = 0; i < nr; i++) {
1769 str = do_read_string(fd, ph);
1773 argv[i] = cmdline + len;
1774 memcpy(argv[i], str, strlen(str) + 1);
1775 len += strlen(str) + 1;
1778 ph->env.cmdline = cmdline;
1779 ph->env.cmdline_argv = (const char **) argv;
1788 static int process_cpu_topology(struct perf_file_section *section,
1789 struct perf_header *ph, int fd,
1790 void *data __maybe_unused)
1796 int cpu_nr = ph->env.nr_cpus_avail;
1799 ph->env.cpu = calloc(cpu_nr, sizeof(*ph->env.cpu));
1803 ret = readn(fd, &nr, sizeof(nr));
1804 if (ret != sizeof(nr))
1810 ph->env.nr_sibling_cores = nr;
1811 size += sizeof(u32);
1812 if (strbuf_init(&sb, 128) < 0)
1815 for (i = 0; i < nr; i++) {
1816 str = do_read_string(fd, ph);
1820 /* include a NULL character at the end */
1821 if (strbuf_add(&sb, str, strlen(str) + 1) < 0)
1823 size += string_size(str);
1826 ph->env.sibling_cores = strbuf_detach(&sb, NULL);
1828 ret = readn(fd, &nr, sizeof(nr));
1829 if (ret != sizeof(nr))
1835 ph->env.nr_sibling_threads = nr;
1836 size += sizeof(u32);
1838 for (i = 0; i < nr; i++) {
1839 str = do_read_string(fd, ph);
1843 /* include a NULL character at the end */
1844 if (strbuf_add(&sb, str, strlen(str) + 1) < 0)
1846 size += string_size(str);
1849 ph->env.sibling_threads = strbuf_detach(&sb, NULL);
1852 * The header may be from old perf,
1853 * which doesn't include core id and socket id information.
1855 if (section->size <= size) {
1856 zfree(&ph->env.cpu);
1860 for (i = 0; i < (u32)cpu_nr; i++) {
1861 ret = readn(fd, &nr, sizeof(nr));
1862 if (ret != sizeof(nr))
1868 ph->env.cpu[i].core_id = nr;
1870 ret = readn(fd, &nr, sizeof(nr));
1871 if (ret != sizeof(nr))
1877 if (nr != (u32)-1 && nr > (u32)cpu_nr) {
1878 pr_debug("socket_id number is too big."
1879 "You may need to upgrade the perf tool.\n");
1883 ph->env.cpu[i].socket_id = nr;
1889 strbuf_release(&sb);
1891 zfree(&ph->env.cpu);
1895 static int process_numa_topology(struct perf_file_section *section __maybe_unused,
1896 struct perf_header *ph, int fd,
1897 void *data __maybe_unused)
1899 struct numa_node *nodes, *n;
1905 ret = readn(fd, &nr, sizeof(nr));
1906 if (ret != sizeof(nr))
1912 nodes = zalloc(sizeof(*nodes) * nr);
1916 for (i = 0; i < nr; i++) {
1920 ret = readn(fd, &n->node, sizeof(u32));
1921 if (ret != sizeof(n->node))
1924 ret = readn(fd, &n->mem_total, sizeof(u64));
1925 if (ret != sizeof(u64))
1928 ret = readn(fd, &n->mem_free, sizeof(u64));
1929 if (ret != sizeof(u64))
1932 if (ph->needs_swap) {
1933 n->node = bswap_32(n->node);
1934 n->mem_total = bswap_64(n->mem_total);
1935 n->mem_free = bswap_64(n->mem_free);
1938 str = do_read_string(fd, ph);
1942 n->map = cpu_map__new(str);
1948 ph->env.nr_numa_nodes = nr;
1949 ph->env.numa_nodes = nodes;
1957 static int process_pmu_mappings(struct perf_file_section *section __maybe_unused,
1958 struct perf_header *ph, int fd,
1959 void *data __maybe_unused)
1967 ret = readn(fd, &pmu_num, sizeof(pmu_num));
1968 if (ret != sizeof(pmu_num))
1972 pmu_num = bswap_32(pmu_num);
1975 pr_debug("pmu mappings not available\n");
1979 ph->env.nr_pmu_mappings = pmu_num;
1980 if (strbuf_init(&sb, 128) < 0)
1984 if (readn(fd, &type, sizeof(type)) != sizeof(type))
1987 type = bswap_32(type);
1989 name = do_read_string(fd, ph);
1993 if (strbuf_addf(&sb, "%u:%s", type, name) < 0)
1995 /* include a NULL character at the end */
1996 if (strbuf_add(&sb, "", 1) < 0)
1999 if (!strcmp(name, "msr"))
2000 ph->env.msr_pmu_type = type;
2005 ph->env.pmu_mappings = strbuf_detach(&sb, NULL);
2009 strbuf_release(&sb);
2013 static int process_group_desc(struct perf_file_section *section __maybe_unused,
2014 struct perf_header *ph, int fd,
2015 void *data __maybe_unused)
2018 u32 i, nr, nr_groups;
2019 struct perf_session *session;
2020 struct perf_evsel *evsel, *leader = NULL;
2027 if (readn(fd, &nr_groups, sizeof(nr_groups)) != sizeof(nr_groups))
2031 nr_groups = bswap_32(nr_groups);
2033 ph->env.nr_groups = nr_groups;
2035 pr_debug("group desc not available\n");
2039 desc = calloc(nr_groups, sizeof(*desc));
2043 for (i = 0; i < nr_groups; i++) {
2044 desc[i].name = do_read_string(fd, ph);
2048 if (readn(fd, &desc[i].leader_idx, sizeof(u32)) != sizeof(u32))
2051 if (readn(fd, &desc[i].nr_members, sizeof(u32)) != sizeof(u32))
2054 if (ph->needs_swap) {
2055 desc[i].leader_idx = bswap_32(desc[i].leader_idx);
2056 desc[i].nr_members = bswap_32(desc[i].nr_members);
2061 * Rebuild group relationship based on the group_desc
2063 session = container_of(ph, struct perf_session, header);
2064 session->evlist->nr_groups = nr_groups;
2067 evlist__for_each_entry(session->evlist, evsel) {
2068 if (evsel->idx == (int) desc[i].leader_idx) {
2069 evsel->leader = evsel;
2070 /* {anon_group} is a dummy name */
2071 if (strcmp(desc[i].name, "{anon_group}")) {
2072 evsel->group_name = desc[i].name;
2073 desc[i].name = NULL;
2075 evsel->nr_members = desc[i].nr_members;
2077 if (i >= nr_groups || nr > 0) {
2078 pr_debug("invalid group desc\n");
2083 nr = evsel->nr_members - 1;
2086 /* This is a group member */
2087 evsel->leader = leader;
2093 if (i != nr_groups || nr != 0) {
2094 pr_debug("invalid group desc\n");
2100 for (i = 0; i < nr_groups; i++)
2101 zfree(&desc[i].name);
2107 static int process_auxtrace(struct perf_file_section *section,
2108 struct perf_header *ph, int fd,
2109 void *data __maybe_unused)
2111 struct perf_session *session;
2114 session = container_of(ph, struct perf_session, header);
2116 err = auxtrace_index__process(fd, section->size, session,
2119 pr_err("Failed to process auxtrace index\n");
2123 static int process_cache(struct perf_file_section *section __maybe_unused,
2124 struct perf_header *ph __maybe_unused, int fd __maybe_unused,
2125 void *data __maybe_unused)
2127 struct cpu_cache_level *caches;
2128 u32 cnt, i, version;
2130 if (readn(fd, &version, sizeof(version)) != sizeof(version))
2134 version = bswap_32(version);
2139 if (readn(fd, &cnt, sizeof(cnt)) != sizeof(cnt))
2143 cnt = bswap_32(cnt);
2145 caches = zalloc(sizeof(*caches) * cnt);
2149 for (i = 0; i < cnt; i++) {
2150 struct cpu_cache_level c;
2153 if (readn(fd, &c.v, sizeof(u32)) != sizeof(u32))\
2154 goto out_free_caches; \
2155 if (ph->needs_swap) \
2156 c.v = bswap_32(c.v); \
2165 c.v = do_read_string(fd, ph); \
2167 goto out_free_caches;
2177 ph->env.caches = caches;
2178 ph->env.caches_cnt = cnt;
2185 struct feature_ops {
2186 int (*write)(int fd, struct perf_header *h, struct perf_evlist *evlist);
2187 void (*print)(struct perf_header *h, int fd, FILE *fp);
2188 int (*process)(struct perf_file_section *section,
2189 struct perf_header *h, int fd, void *data);
2194 #define FEAT_OPA(n, func) \
2195 [n] = { .name = #n, .write = write_##func, .print = print_##func }
2196 #define FEAT_OPP(n, func) \
2197 [n] = { .name = #n, .write = write_##func, .print = print_##func, \
2198 .process = process_##func }
2199 #define FEAT_OPF(n, func) \
2200 [n] = { .name = #n, .write = write_##func, .print = print_##func, \
2201 .process = process_##func, .full_only = true }
2203 /* feature_ops not implemented: */
2204 #define print_tracing_data NULL
2205 #define print_build_id NULL
2207 static const struct feature_ops feat_ops[HEADER_LAST_FEATURE] = {
2208 FEAT_OPP(HEADER_TRACING_DATA, tracing_data),
2209 FEAT_OPP(HEADER_BUILD_ID, build_id),
2210 FEAT_OPP(HEADER_HOSTNAME, hostname),
2211 FEAT_OPP(HEADER_OSRELEASE, osrelease),
2212 FEAT_OPP(HEADER_VERSION, version),
2213 FEAT_OPP(HEADER_ARCH, arch),
2214 FEAT_OPP(HEADER_NRCPUS, nrcpus),
2215 FEAT_OPP(HEADER_CPUDESC, cpudesc),
2216 FEAT_OPP(HEADER_CPUID, cpuid),
2217 FEAT_OPP(HEADER_TOTAL_MEM, total_mem),
2218 FEAT_OPP(HEADER_EVENT_DESC, event_desc),
2219 FEAT_OPP(HEADER_CMDLINE, cmdline),
2220 FEAT_OPF(HEADER_CPU_TOPOLOGY, cpu_topology),
2221 FEAT_OPF(HEADER_NUMA_TOPOLOGY, numa_topology),
2222 FEAT_OPA(HEADER_BRANCH_STACK, branch_stack),
2223 FEAT_OPP(HEADER_PMU_MAPPINGS, pmu_mappings),
2224 FEAT_OPP(HEADER_GROUP_DESC, group_desc),
2225 FEAT_OPP(HEADER_AUXTRACE, auxtrace),
2226 FEAT_OPA(HEADER_STAT, stat),
2227 FEAT_OPF(HEADER_CACHE, cache),
2230 struct header_print_data {
2232 bool full; /* extended list of headers */
2235 static int perf_file_section__fprintf_info(struct perf_file_section *section,
2236 struct perf_header *ph,
2237 int feat, int fd, void *data)
2239 struct header_print_data *hd = data;
2241 if (lseek(fd, section->offset, SEEK_SET) == (off_t)-1) {
2242 pr_debug("Failed to lseek to %" PRIu64 " offset for feature "
2243 "%d, continuing...\n", section->offset, feat);
2246 if (feat >= HEADER_LAST_FEATURE) {
2247 pr_warning("unknown feature %d\n", feat);
2250 if (!feat_ops[feat].print)
2253 if (!feat_ops[feat].full_only || hd->full)
2254 feat_ops[feat].print(ph, fd, hd->fp);
2256 fprintf(hd->fp, "# %s info available, use -I to display\n",
2257 feat_ops[feat].name);
2262 int perf_header__fprintf_info(struct perf_session *session, FILE *fp, bool full)
2264 struct header_print_data hd;
2265 struct perf_header *header = &session->header;
2266 int fd = perf_data_file__fd(session->file);
2273 ret = fstat(fd, &st);
2277 fprintf(fp, "# captured on: %s", ctime(&st.st_ctime));
2279 perf_header__process_sections(header, fd, &hd,
2280 perf_file_section__fprintf_info);
2282 if (session->file->is_pipe)
2285 fprintf(fp, "# missing features: ");
2286 for_each_clear_bit(bit, header->adds_features, HEADER_LAST_FEATURE) {
2288 fprintf(fp, "%s ", feat_ops[bit].name);
2295 static int do_write_feat(int fd, struct perf_header *h, int type,
2296 struct perf_file_section **p,
2297 struct perf_evlist *evlist)
2302 if (perf_header__has_feat(h, type)) {
2303 if (!feat_ops[type].write)
2306 (*p)->offset = lseek(fd, 0, SEEK_CUR);
2308 err = feat_ops[type].write(fd, h, evlist);
2310 pr_debug("failed to write feature %s\n", feat_ops[type].name);
2312 /* undo anything written */
2313 lseek(fd, (*p)->offset, SEEK_SET);
2317 (*p)->size = lseek(fd, 0, SEEK_CUR) - (*p)->offset;
2323 static int perf_header__adds_write(struct perf_header *header,
2324 struct perf_evlist *evlist, int fd)
2327 struct perf_file_section *feat_sec, *p;
2333 nr_sections = bitmap_weight(header->adds_features, HEADER_FEAT_BITS);
2337 feat_sec = p = calloc(nr_sections, sizeof(*feat_sec));
2338 if (feat_sec == NULL)
2341 sec_size = sizeof(*feat_sec) * nr_sections;
2343 sec_start = header->feat_offset;
2344 lseek(fd, sec_start + sec_size, SEEK_SET);
2346 for_each_set_bit(feat, header->adds_features, HEADER_FEAT_BITS) {
2347 if (do_write_feat(fd, header, feat, &p, evlist))
2348 perf_header__clear_feat(header, feat);
2351 lseek(fd, sec_start, SEEK_SET);
2353 * may write more than needed due to dropped feature, but
2354 * this is okay, reader will skip the mising entries
2356 err = do_write(fd, feat_sec, sec_size);
2358 pr_debug("failed to write feature section\n");
2363 int perf_header__write_pipe(int fd)
2365 struct perf_pipe_file_header f_header;
2368 f_header = (struct perf_pipe_file_header){
2369 .magic = PERF_MAGIC,
2370 .size = sizeof(f_header),
2373 err = do_write(fd, &f_header, sizeof(f_header));
2375 pr_debug("failed to write perf pipe header\n");
2382 int perf_session__write_header(struct perf_session *session,
2383 struct perf_evlist *evlist,
2384 int fd, bool at_exit)
2386 struct perf_file_header f_header;
2387 struct perf_file_attr f_attr;
2388 struct perf_header *header = &session->header;
2389 struct perf_evsel *evsel;
2393 lseek(fd, sizeof(f_header), SEEK_SET);
2395 evlist__for_each_entry(session->evlist, evsel) {
2396 evsel->id_offset = lseek(fd, 0, SEEK_CUR);
2397 err = do_write(fd, evsel->id, evsel->ids * sizeof(u64));
2399 pr_debug("failed to write perf header\n");
2404 attr_offset = lseek(fd, 0, SEEK_CUR);
2406 evlist__for_each_entry(evlist, evsel) {
2407 f_attr = (struct perf_file_attr){
2408 .attr = evsel->attr,
2410 .offset = evsel->id_offset,
2411 .size = evsel->ids * sizeof(u64),
2414 err = do_write(fd, &f_attr, sizeof(f_attr));
2416 pr_debug("failed to write perf header attribute\n");
2421 if (!header->data_offset)
2422 header->data_offset = lseek(fd, 0, SEEK_CUR);
2423 header->feat_offset = header->data_offset + header->data_size;
2426 err = perf_header__adds_write(header, evlist, fd);
2431 f_header = (struct perf_file_header){
2432 .magic = PERF_MAGIC,
2433 .size = sizeof(f_header),
2434 .attr_size = sizeof(f_attr),
2436 .offset = attr_offset,
2437 .size = evlist->nr_entries * sizeof(f_attr),
2440 .offset = header->data_offset,
2441 .size = header->data_size,
2443 /* event_types is ignored, store zeros */
2446 memcpy(&f_header.adds_features, &header->adds_features, sizeof(header->adds_features));
2448 lseek(fd, 0, SEEK_SET);
2449 err = do_write(fd, &f_header, sizeof(f_header));
2451 pr_debug("failed to write perf header\n");
2454 lseek(fd, header->data_offset + header->data_size, SEEK_SET);
2459 static int perf_header__getbuffer64(struct perf_header *header,
2460 int fd, void *buf, size_t size)
2462 if (readn(fd, buf, size) <= 0)
2465 if (header->needs_swap)
2466 mem_bswap_64(buf, size);
2471 int perf_header__process_sections(struct perf_header *header, int fd,
2473 int (*process)(struct perf_file_section *section,
2474 struct perf_header *ph,
2475 int feat, int fd, void *data))
2477 struct perf_file_section *feat_sec, *sec;
2483 nr_sections = bitmap_weight(header->adds_features, HEADER_FEAT_BITS);
2487 feat_sec = sec = calloc(nr_sections, sizeof(*feat_sec));
2491 sec_size = sizeof(*feat_sec) * nr_sections;
2493 lseek(fd, header->feat_offset, SEEK_SET);
2495 err = perf_header__getbuffer64(header, fd, feat_sec, sec_size);
2499 for_each_set_bit(feat, header->adds_features, HEADER_LAST_FEATURE) {
2500 err = process(sec++, header, feat, fd, data);
2510 static const int attr_file_abi_sizes[] = {
2511 [0] = PERF_ATTR_SIZE_VER0,
2512 [1] = PERF_ATTR_SIZE_VER1,
2513 [2] = PERF_ATTR_SIZE_VER2,
2514 [3] = PERF_ATTR_SIZE_VER3,
2515 [4] = PERF_ATTR_SIZE_VER4,
2520 * In the legacy file format, the magic number is not used to encode endianness.
2521 * hdr_sz was used to encode endianness. But given that hdr_sz can vary based
2522 * on ABI revisions, we need to try all combinations for all endianness to
2523 * detect the endianness.
2525 static int try_all_file_abis(uint64_t hdr_sz, struct perf_header *ph)
2527 uint64_t ref_size, attr_size;
2530 for (i = 0 ; attr_file_abi_sizes[i]; i++) {
2531 ref_size = attr_file_abi_sizes[i]
2532 + sizeof(struct perf_file_section);
2533 if (hdr_sz != ref_size) {
2534 attr_size = bswap_64(hdr_sz);
2535 if (attr_size != ref_size)
2538 ph->needs_swap = true;
2540 pr_debug("ABI%d perf.data file detected, need_swap=%d\n",
2545 /* could not determine endianness */
2549 #define PERF_PIPE_HDR_VER0 16
2551 static const size_t attr_pipe_abi_sizes[] = {
2552 [0] = PERF_PIPE_HDR_VER0,
2557 * In the legacy pipe format, there is an implicit assumption that endiannesss
2558 * between host recording the samples, and host parsing the samples is the
2559 * same. This is not always the case given that the pipe output may always be
2560 * redirected into a file and analyzed on a different machine with possibly a
2561 * different endianness and perf_event ABI revsions in the perf tool itself.
2563 static int try_all_pipe_abis(uint64_t hdr_sz, struct perf_header *ph)
2568 for (i = 0 ; attr_pipe_abi_sizes[i]; i++) {
2569 if (hdr_sz != attr_pipe_abi_sizes[i]) {
2570 attr_size = bswap_64(hdr_sz);
2571 if (attr_size != hdr_sz)
2574 ph->needs_swap = true;
2576 pr_debug("Pipe ABI%d perf.data file detected\n", i);
2582 bool is_perf_magic(u64 magic)
2584 if (!memcmp(&magic, __perf_magic1, sizeof(magic))
2585 || magic == __perf_magic2
2586 || magic == __perf_magic2_sw)
2592 static int check_magic_endian(u64 magic, uint64_t hdr_sz,
2593 bool is_pipe, struct perf_header *ph)
2597 /* check for legacy format */
2598 ret = memcmp(&magic, __perf_magic1, sizeof(magic));
2600 ph->version = PERF_HEADER_VERSION_1;
2601 pr_debug("legacy perf.data format\n");
2603 return try_all_pipe_abis(hdr_sz, ph);
2605 return try_all_file_abis(hdr_sz, ph);
2608 * the new magic number serves two purposes:
2609 * - unique number to identify actual perf.data files
2610 * - encode endianness of file
2612 ph->version = PERF_HEADER_VERSION_2;
2614 /* check magic number with one endianness */
2615 if (magic == __perf_magic2)
2618 /* check magic number with opposite endianness */
2619 if (magic != __perf_magic2_sw)
2622 ph->needs_swap = true;
2627 int perf_file_header__read(struct perf_file_header *header,
2628 struct perf_header *ph, int fd)
2632 lseek(fd, 0, SEEK_SET);
2634 ret = readn(fd, header, sizeof(*header));
2638 if (check_magic_endian(header->magic,
2639 header->attr_size, false, ph) < 0) {
2640 pr_debug("magic/endian check failed\n");
2644 if (ph->needs_swap) {
2645 mem_bswap_64(header, offsetof(struct perf_file_header,
2649 if (header->size != sizeof(*header)) {
2650 /* Support the previous format */
2651 if (header->size == offsetof(typeof(*header), adds_features))
2652 bitmap_zero(header->adds_features, HEADER_FEAT_BITS);
2655 } else if (ph->needs_swap) {
2657 * feature bitmap is declared as an array of unsigned longs --
2658 * not good since its size can differ between the host that
2659 * generated the data file and the host analyzing the file.
2661 * We need to handle endianness, but we don't know the size of
2662 * the unsigned long where the file was generated. Take a best
2663 * guess at determining it: try 64-bit swap first (ie., file
2664 * created on a 64-bit host), and check if the hostname feature
2665 * bit is set (this feature bit is forced on as of fbe96f2).
2666 * If the bit is not, undo the 64-bit swap and try a 32-bit
2667 * swap. If the hostname bit is still not set (e.g., older data
2668 * file), punt and fallback to the original behavior --
2669 * clearing all feature bits and setting buildid.
2671 mem_bswap_64(&header->adds_features,
2672 BITS_TO_U64(HEADER_FEAT_BITS));
2674 if (!test_bit(HEADER_HOSTNAME, header->adds_features)) {
2676 mem_bswap_64(&header->adds_features,
2677 BITS_TO_U64(HEADER_FEAT_BITS));
2680 mem_bswap_32(&header->adds_features,
2681 BITS_TO_U32(HEADER_FEAT_BITS));
2684 if (!test_bit(HEADER_HOSTNAME, header->adds_features)) {
2685 bitmap_zero(header->adds_features, HEADER_FEAT_BITS);
2686 set_bit(HEADER_BUILD_ID, header->adds_features);
2690 memcpy(&ph->adds_features, &header->adds_features,
2691 sizeof(ph->adds_features));
2693 ph->data_offset = header->data.offset;
2694 ph->data_size = header->data.size;
2695 ph->feat_offset = header->data.offset + header->data.size;
2699 static int perf_file_section__process(struct perf_file_section *section,
2700 struct perf_header *ph,
2701 int feat, int fd, void *data)
2703 if (lseek(fd, section->offset, SEEK_SET) == (off_t)-1) {
2704 pr_debug("Failed to lseek to %" PRIu64 " offset for feature "
2705 "%d, continuing...\n", section->offset, feat);
2709 if (feat >= HEADER_LAST_FEATURE) {
2710 pr_debug("unknown feature %d, continuing...\n", feat);
2714 if (!feat_ops[feat].process)
2717 return feat_ops[feat].process(section, ph, fd, data);
2720 static int perf_file_header__read_pipe(struct perf_pipe_file_header *header,
2721 struct perf_header *ph, int fd,
2726 ret = readn(fd, header, sizeof(*header));
2730 if (check_magic_endian(header->magic, header->size, true, ph) < 0) {
2731 pr_debug("endian/magic failed\n");
2736 header->size = bswap_64(header->size);
2738 if (repipe && do_write(STDOUT_FILENO, header, sizeof(*header)) < 0)
2744 static int perf_header__read_pipe(struct perf_session *session)
2746 struct perf_header *header = &session->header;
2747 struct perf_pipe_file_header f_header;
2749 if (perf_file_header__read_pipe(&f_header, header,
2750 perf_data_file__fd(session->file),
2751 session->repipe) < 0) {
2752 pr_debug("incompatible file format\n");
2759 static int read_attr(int fd, struct perf_header *ph,
2760 struct perf_file_attr *f_attr)
2762 struct perf_event_attr *attr = &f_attr->attr;
2764 size_t our_sz = sizeof(f_attr->attr);
2767 memset(f_attr, 0, sizeof(*f_attr));
2769 /* read minimal guaranteed structure */
2770 ret = readn(fd, attr, PERF_ATTR_SIZE_VER0);
2772 pr_debug("cannot read %d bytes of header attr\n",
2773 PERF_ATTR_SIZE_VER0);
2777 /* on file perf_event_attr size */
2785 sz = PERF_ATTR_SIZE_VER0;
2786 } else if (sz > our_sz) {
2787 pr_debug("file uses a more recent and unsupported ABI"
2788 " (%zu bytes extra)\n", sz - our_sz);
2791 /* what we have not yet read and that we know about */
2792 left = sz - PERF_ATTR_SIZE_VER0;
2795 ptr += PERF_ATTR_SIZE_VER0;
2797 ret = readn(fd, ptr, left);
2799 /* read perf_file_section, ids are read in caller */
2800 ret = readn(fd, &f_attr->ids, sizeof(f_attr->ids));
2802 return ret <= 0 ? -1 : 0;
2805 static int perf_evsel__prepare_tracepoint_event(struct perf_evsel *evsel,
2806 struct pevent *pevent)
2808 struct event_format *event;
2811 /* already prepared */
2812 if (evsel->tp_format)
2815 if (pevent == NULL) {
2816 pr_debug("broken or missing trace data\n");
2820 event = pevent_find_event(pevent, evsel->attr.config);
2821 if (event == NULL) {
2822 pr_debug("cannot find event format for %d\n", (int)evsel->attr.config);
2827 snprintf(bf, sizeof(bf), "%s:%s", event->system, event->name);
2828 evsel->name = strdup(bf);
2829 if (evsel->name == NULL)
2833 evsel->tp_format = event;
2837 static int perf_evlist__prepare_tracepoint_events(struct perf_evlist *evlist,
2838 struct pevent *pevent)
2840 struct perf_evsel *pos;
2842 evlist__for_each_entry(evlist, pos) {
2843 if (pos->attr.type == PERF_TYPE_TRACEPOINT &&
2844 perf_evsel__prepare_tracepoint_event(pos, pevent))
2851 int perf_session__read_header(struct perf_session *session)
2853 struct perf_data_file *file = session->file;
2854 struct perf_header *header = &session->header;
2855 struct perf_file_header f_header;
2856 struct perf_file_attr f_attr;
2858 int nr_attrs, nr_ids, i, j;
2859 int fd = perf_data_file__fd(file);
2861 session->evlist = perf_evlist__new();
2862 if (session->evlist == NULL)
2865 session->evlist->env = &header->env;
2866 session->machines.host.env = &header->env;
2867 if (perf_data_file__is_pipe(file))
2868 return perf_header__read_pipe(session);
2870 if (perf_file_header__read(&f_header, header, fd) < 0)
2874 * Sanity check that perf.data was written cleanly; data size is
2875 * initialized to 0 and updated only if the on_exit function is run.
2876 * If data size is still 0 then the file contains only partial
2877 * information. Just warn user and process it as much as it can.
2879 if (f_header.data.size == 0) {
2880 pr_warning("WARNING: The %s file's data size field is 0 which is unexpected.\n"
2881 "Was the 'perf record' command properly terminated?\n",
2885 nr_attrs = f_header.attrs.size / f_header.attr_size;
2886 lseek(fd, f_header.attrs.offset, SEEK_SET);
2888 for (i = 0; i < nr_attrs; i++) {
2889 struct perf_evsel *evsel;
2892 if (read_attr(fd, header, &f_attr) < 0)
2895 if (header->needs_swap) {
2896 f_attr.ids.size = bswap_64(f_attr.ids.size);
2897 f_attr.ids.offset = bswap_64(f_attr.ids.offset);
2898 perf_event__attr_swap(&f_attr.attr);
2901 tmp = lseek(fd, 0, SEEK_CUR);
2902 evsel = perf_evsel__new(&f_attr.attr);
2905 goto out_delete_evlist;
2907 evsel->needs_swap = header->needs_swap;
2909 * Do it before so that if perf_evsel__alloc_id fails, this
2910 * entry gets purged too at perf_evlist__delete().
2912 perf_evlist__add(session->evlist, evsel);
2914 nr_ids = f_attr.ids.size / sizeof(u64);
2916 * We don't have the cpu and thread maps on the header, so
2917 * for allocating the perf_sample_id table we fake 1 cpu and
2918 * hattr->ids threads.
2920 if (perf_evsel__alloc_id(evsel, 1, nr_ids))
2921 goto out_delete_evlist;
2923 lseek(fd, f_attr.ids.offset, SEEK_SET);
2925 for (j = 0; j < nr_ids; j++) {
2926 if (perf_header__getbuffer64(header, fd, &f_id, sizeof(f_id)))
2929 perf_evlist__id_add(session->evlist, evsel, 0, j, f_id);
2932 lseek(fd, tmp, SEEK_SET);
2935 symbol_conf.nr_events = nr_attrs;
2937 perf_header__process_sections(header, fd, &session->tevent,
2938 perf_file_section__process);
2940 if (perf_evlist__prepare_tracepoint_events(session->evlist,
2941 session->tevent.pevent))
2942 goto out_delete_evlist;
2949 perf_evlist__delete(session->evlist);
2950 session->evlist = NULL;
2954 int perf_event__synthesize_attr(struct perf_tool *tool,
2955 struct perf_event_attr *attr, u32 ids, u64 *id,
2956 perf_event__handler_t process)
2958 union perf_event *ev;
2962 size = sizeof(struct perf_event_attr);
2963 size = PERF_ALIGN(size, sizeof(u64));
2964 size += sizeof(struct perf_event_header);
2965 size += ids * sizeof(u64);
2972 ev->attr.attr = *attr;
2973 memcpy(ev->attr.id, id, ids * sizeof(u64));
2975 ev->attr.header.type = PERF_RECORD_HEADER_ATTR;
2976 ev->attr.header.size = (u16)size;
2978 if (ev->attr.header.size == size)
2979 err = process(tool, ev, NULL, NULL);
2988 static struct event_update_event *
2989 event_update_event__new(size_t size, u64 type, u64 id)
2991 struct event_update_event *ev;
2993 size += sizeof(*ev);
2994 size = PERF_ALIGN(size, sizeof(u64));
2998 ev->header.type = PERF_RECORD_EVENT_UPDATE;
2999 ev->header.size = (u16)size;
3007 perf_event__synthesize_event_update_unit(struct perf_tool *tool,
3008 struct perf_evsel *evsel,
3009 perf_event__handler_t process)
3011 struct event_update_event *ev;
3012 size_t size = strlen(evsel->unit);
3015 ev = event_update_event__new(size + 1, PERF_EVENT_UPDATE__UNIT, evsel->id[0]);
3019 strncpy(ev->data, evsel->unit, size);
3020 err = process(tool, (union perf_event *)ev, NULL, NULL);
3026 perf_event__synthesize_event_update_scale(struct perf_tool *tool,
3027 struct perf_evsel *evsel,
3028 perf_event__handler_t process)
3030 struct event_update_event *ev;
3031 struct event_update_event_scale *ev_data;
3034 ev = event_update_event__new(sizeof(*ev_data), PERF_EVENT_UPDATE__SCALE, evsel->id[0]);
3038 ev_data = (struct event_update_event_scale *) ev->data;
3039 ev_data->scale = evsel->scale;
3040 err = process(tool, (union perf_event*) ev, NULL, NULL);
3046 perf_event__synthesize_event_update_name(struct perf_tool *tool,
3047 struct perf_evsel *evsel,
3048 perf_event__handler_t process)
3050 struct event_update_event *ev;
3051 size_t len = strlen(evsel->name);
3054 ev = event_update_event__new(len + 1, PERF_EVENT_UPDATE__NAME, evsel->id[0]);
3058 strncpy(ev->data, evsel->name, len);
3059 err = process(tool, (union perf_event*) ev, NULL, NULL);
3065 perf_event__synthesize_event_update_cpus(struct perf_tool *tool,
3066 struct perf_evsel *evsel,
3067 perf_event__handler_t process)
3069 size_t size = sizeof(struct event_update_event);
3070 struct event_update_event *ev;
3074 if (!evsel->own_cpus)
3077 ev = cpu_map_data__alloc(evsel->own_cpus, &size, &type, &max);
3081 ev->header.type = PERF_RECORD_EVENT_UPDATE;
3082 ev->header.size = (u16)size;
3083 ev->type = PERF_EVENT_UPDATE__CPUS;
3084 ev->id = evsel->id[0];
3086 cpu_map_data__synthesize((struct cpu_map_data *) ev->data,
3090 err = process(tool, (union perf_event*) ev, NULL, NULL);
3095 size_t perf_event__fprintf_event_update(union perf_event *event, FILE *fp)
3097 struct event_update_event *ev = &event->event_update;
3098 struct event_update_event_scale *ev_scale;
3099 struct event_update_event_cpus *ev_cpus;
3100 struct cpu_map *map;
3103 ret = fprintf(fp, "\n... id: %" PRIu64 "\n", ev->id);
3106 case PERF_EVENT_UPDATE__SCALE:
3107 ev_scale = (struct event_update_event_scale *) ev->data;
3108 ret += fprintf(fp, "... scale: %f\n", ev_scale->scale);
3110 case PERF_EVENT_UPDATE__UNIT:
3111 ret += fprintf(fp, "... unit: %s\n", ev->data);
3113 case PERF_EVENT_UPDATE__NAME:
3114 ret += fprintf(fp, "... name: %s\n", ev->data);
3116 case PERF_EVENT_UPDATE__CPUS:
3117 ev_cpus = (struct event_update_event_cpus *) ev->data;
3118 ret += fprintf(fp, "... ");
3120 map = cpu_map__new_data(&ev_cpus->cpus);
3122 ret += cpu_map__fprintf(map, fp);
3124 ret += fprintf(fp, "failed to get cpus\n");
3127 ret += fprintf(fp, "... unknown type\n");
3134 int perf_event__synthesize_attrs(struct perf_tool *tool,
3135 struct perf_session *session,
3136 perf_event__handler_t process)
3138 struct perf_evsel *evsel;
3141 evlist__for_each_entry(session->evlist, evsel) {
3142 err = perf_event__synthesize_attr(tool, &evsel->attr, evsel->ids,
3143 evsel->id, process);
3145 pr_debug("failed to create perf header attribute\n");
3153 int perf_event__process_attr(struct perf_tool *tool __maybe_unused,
3154 union perf_event *event,
3155 struct perf_evlist **pevlist)
3158 struct perf_evsel *evsel;
3159 struct perf_evlist *evlist = *pevlist;
3161 if (evlist == NULL) {
3162 *pevlist = evlist = perf_evlist__new();
3167 evsel = perf_evsel__new(&event->attr.attr);
3171 perf_evlist__add(evlist, evsel);
3173 ids = event->header.size;
3174 ids -= (void *)&event->attr.id - (void *)event;
3175 n_ids = ids / sizeof(u64);
3177 * We don't have the cpu and thread maps on the header, so
3178 * for allocating the perf_sample_id table we fake 1 cpu and
3179 * hattr->ids threads.
3181 if (perf_evsel__alloc_id(evsel, 1, n_ids))
3184 for (i = 0; i < n_ids; i++) {
3185 perf_evlist__id_add(evlist, evsel, 0, i, event->attr.id[i]);
3188 symbol_conf.nr_events = evlist->nr_entries;
3193 int perf_event__process_event_update(struct perf_tool *tool __maybe_unused,
3194 union perf_event *event,
3195 struct perf_evlist **pevlist)
3197 struct event_update_event *ev = &event->event_update;
3198 struct event_update_event_scale *ev_scale;
3199 struct event_update_event_cpus *ev_cpus;
3200 struct perf_evlist *evlist;
3201 struct perf_evsel *evsel;
3202 struct cpu_map *map;
3204 if (!pevlist || *pevlist == NULL)
3209 evsel = perf_evlist__id2evsel(evlist, ev->id);
3214 case PERF_EVENT_UPDATE__UNIT:
3215 evsel->unit = strdup(ev->data);
3217 case PERF_EVENT_UPDATE__NAME:
3218 evsel->name = strdup(ev->data);
3220 case PERF_EVENT_UPDATE__SCALE:
3221 ev_scale = (struct event_update_event_scale *) ev->data;
3222 evsel->scale = ev_scale->scale;
3224 case PERF_EVENT_UPDATE__CPUS:
3225 ev_cpus = (struct event_update_event_cpus *) ev->data;
3227 map = cpu_map__new_data(&ev_cpus->cpus);
3229 evsel->own_cpus = map;
3231 pr_err("failed to get event_update cpus\n");
3239 int perf_event__synthesize_tracing_data(struct perf_tool *tool, int fd,
3240 struct perf_evlist *evlist,
3241 perf_event__handler_t process)
3243 union perf_event ev;
3244 struct tracing_data *tdata;
3245 ssize_t size = 0, aligned_size = 0, padding;
3246 int err __maybe_unused = 0;
3249 * We are going to store the size of the data followed
3250 * by the data contents. Since the fd descriptor is a pipe,
3251 * we cannot seek back to store the size of the data once
3252 * we know it. Instead we:
3254 * - write the tracing data to the temp file
3255 * - get/write the data size to pipe
3256 * - write the tracing data from the temp file
3259 tdata = tracing_data_get(&evlist->entries, fd, true);
3263 memset(&ev, 0, sizeof(ev));
3265 ev.tracing_data.header.type = PERF_RECORD_HEADER_TRACING_DATA;
3267 aligned_size = PERF_ALIGN(size, sizeof(u64));
3268 padding = aligned_size - size;
3269 ev.tracing_data.header.size = sizeof(ev.tracing_data);
3270 ev.tracing_data.size = aligned_size;
3272 process(tool, &ev, NULL, NULL);
3275 * The put function will copy all the tracing data
3276 * stored in temp file to the pipe.
3278 tracing_data_put(tdata);
3280 write_padded(fd, NULL, 0, padding);
3282 return aligned_size;
3285 int perf_event__process_tracing_data(struct perf_tool *tool __maybe_unused,
3286 union perf_event *event,
3287 struct perf_session *session)
3289 ssize_t size_read, padding, size = event->tracing_data.size;
3290 int fd = perf_data_file__fd(session->file);
3291 off_t offset = lseek(fd, 0, SEEK_CUR);
3294 /* setup for reading amidst mmap */
3295 lseek(fd, offset + sizeof(struct tracing_data_event),
3298 size_read = trace_report(fd, &session->tevent,
3300 padding = PERF_ALIGN(size_read, sizeof(u64)) - size_read;
3302 if (readn(fd, buf, padding) < 0) {
3303 pr_err("%s: reading input file", __func__);
3306 if (session->repipe) {
3307 int retw = write(STDOUT_FILENO, buf, padding);
3308 if (retw <= 0 || retw != padding) {
3309 pr_err("%s: repiping tracing data padding", __func__);
3314 if (size_read + padding != size) {
3315 pr_err("%s: tracing data size mismatch", __func__);
3319 perf_evlist__prepare_tracepoint_events(session->evlist,
3320 session->tevent.pevent);
3322 return size_read + padding;
3325 int perf_event__synthesize_build_id(struct perf_tool *tool,
3326 struct dso *pos, u16 misc,
3327 perf_event__handler_t process,
3328 struct machine *machine)
3330 union perf_event ev;
3337 memset(&ev, 0, sizeof(ev));
3339 len = pos->long_name_len + 1;
3340 len = PERF_ALIGN(len, NAME_ALIGN);
3341 memcpy(&ev.build_id.build_id, pos->build_id, sizeof(pos->build_id));
3342 ev.build_id.header.type = PERF_RECORD_HEADER_BUILD_ID;
3343 ev.build_id.header.misc = misc;
3344 ev.build_id.pid = machine->pid;
3345 ev.build_id.header.size = sizeof(ev.build_id) + len;
3346 memcpy(&ev.build_id.filename, pos->long_name, pos->long_name_len);
3348 err = process(tool, &ev, NULL, machine);
3353 int perf_event__process_build_id(struct perf_tool *tool __maybe_unused,
3354 union perf_event *event,
3355 struct perf_session *session)
3357 __event_process_build_id(&event->build_id,
3358 event->build_id.filename,