7 #include <linux/list.h>
8 #include <linux/kernel.h>
9 #include <linux/bitops.h>
10 #include <sys/utsname.h>
16 #include "trace-event.h"
26 #include <api/fs/fs.h>
31 * must be a numerical value to let the endianness
32 * determine the memory layout. That way we are able
33 * to detect endianness when reading the perf.data file
36 * we check for legacy (PERFFILE) format.
38 static const char *__perf_magic1 = "PERFFILE";
39 static const u64 __perf_magic2 = 0x32454c4946524550ULL;
40 static const u64 __perf_magic2_sw = 0x50455246494c4532ULL;
42 #define PERF_MAGIC __perf_magic2
44 const char perf_version_string[] = PERF_VERSION;
46 struct perf_file_attr {
47 struct perf_event_attr attr;
48 struct perf_file_section ids;
51 void perf_header__set_feat(struct perf_header *header, int feat)
53 set_bit(feat, header->adds_features);
56 void perf_header__clear_feat(struct perf_header *header, int feat)
58 clear_bit(feat, header->adds_features);
61 bool perf_header__has_feat(const struct perf_header *header, int feat)
63 return test_bit(feat, header->adds_features);
66 static int do_write(int fd, const void *buf, size_t size)
69 int ret = write(fd, buf, size);
81 int write_padded(int fd, const void *bf, size_t count, size_t count_aligned)
83 static const char zero_buf[NAME_ALIGN];
84 int err = do_write(fd, bf, count);
87 err = do_write(fd, zero_buf, count_aligned - count);
92 #define string_size(str) \
93 (PERF_ALIGN((strlen(str) + 1), NAME_ALIGN) + sizeof(u32))
95 static int do_write_string(int fd, const char *str)
100 olen = strlen(str) + 1;
101 len = PERF_ALIGN(olen, NAME_ALIGN);
103 /* write len, incl. \0 */
104 ret = do_write(fd, &len, sizeof(len));
108 return write_padded(fd, str, olen, len);
111 static char *do_read_string(int fd, struct perf_header *ph)
117 sz = readn(fd, &len, sizeof(len));
118 if (sz < (ssize_t)sizeof(len))
128 ret = readn(fd, buf, len);
129 if (ret == (ssize_t)len) {
131 * strings are padded by zeroes
132 * thus the actual strlen of buf
133 * may be less than len
142 static int write_tracing_data(int fd, struct perf_header *h __maybe_unused,
143 struct perf_evlist *evlist)
145 return read_tracing_data(fd, &evlist->entries);
149 static int write_build_id(int fd, struct perf_header *h,
150 struct perf_evlist *evlist __maybe_unused)
152 struct perf_session *session;
155 session = container_of(h, struct perf_session, header);
157 if (!perf_session__read_build_ids(session, true))
160 err = perf_session__write_buildid_table(session, fd);
162 pr_debug("failed to write buildid table\n");
165 perf_session__cache_build_ids(session);
170 static int write_hostname(int fd, struct perf_header *h __maybe_unused,
171 struct perf_evlist *evlist __maybe_unused)
180 return do_write_string(fd, uts.nodename);
183 static int write_osrelease(int fd, struct perf_header *h __maybe_unused,
184 struct perf_evlist *evlist __maybe_unused)
193 return do_write_string(fd, uts.release);
196 static int write_arch(int fd, struct perf_header *h __maybe_unused,
197 struct perf_evlist *evlist __maybe_unused)
206 return do_write_string(fd, uts.machine);
209 static int write_version(int fd, struct perf_header *h __maybe_unused,
210 struct perf_evlist *evlist __maybe_unused)
212 return do_write_string(fd, perf_version_string);
215 static int __write_cpudesc(int fd, const char *cpuinfo_proc)
220 const char *search = cpuinfo_proc;
227 file = fopen("/proc/cpuinfo", "r");
231 while (getline(&buf, &len, file) > 0) {
232 ret = strncmp(buf, search, strlen(search));
244 p = strchr(buf, ':');
245 if (p && *(p+1) == ' ' && *(p+2))
251 /* squash extra space characters (branding string) */
258 while (*q && isspace(*q))
261 while ((*r++ = *q++));
265 ret = do_write_string(fd, s);
272 static int write_cpudesc(int fd, struct perf_header *h __maybe_unused,
273 struct perf_evlist *evlist __maybe_unused)
276 #define CPUINFO_PROC {"model name", }
278 const char *cpuinfo_procs[] = CPUINFO_PROC;
281 for (i = 0; i < ARRAY_SIZE(cpuinfo_procs); i++) {
283 ret = __write_cpudesc(fd, cpuinfo_procs[i]);
291 static int write_nrcpus(int fd, struct perf_header *h __maybe_unused,
292 struct perf_evlist *evlist __maybe_unused)
298 nrc = cpu__max_present_cpu();
300 nr = sysconf(_SC_NPROCESSORS_ONLN);
304 nra = (u32)(nr & UINT_MAX);
306 ret = do_write(fd, &nrc, sizeof(nrc));
310 return do_write(fd, &nra, sizeof(nra));
313 static int write_event_desc(int fd, struct perf_header *h __maybe_unused,
314 struct perf_evlist *evlist)
316 struct perf_evsel *evsel;
320 nre = evlist->nr_entries;
323 * write number of events
325 ret = do_write(fd, &nre, sizeof(nre));
330 * size of perf_event_attr struct
332 sz = (u32)sizeof(evsel->attr);
333 ret = do_write(fd, &sz, sizeof(sz));
337 evlist__for_each_entry(evlist, evsel) {
338 ret = do_write(fd, &evsel->attr, sz);
342 * write number of unique id per event
343 * there is one id per instance of an event
345 * copy into an nri to be independent of the
349 ret = do_write(fd, &nri, sizeof(nri));
354 * write event string as passed on cmdline
356 ret = do_write_string(fd, perf_evsel__name(evsel));
360 * write unique ids for this event
362 ret = do_write(fd, evsel->id, evsel->ids * sizeof(u64));
369 static int write_cmdline(int fd, struct perf_header *h __maybe_unused,
370 struct perf_evlist *evlist __maybe_unused)
372 char buf[MAXPATHLEN];
378 * actual atual path to perf binary
380 sprintf(proc, "/proc/%d/exe", getpid());
381 ret = readlink(proc, buf, sizeof(buf));
385 /* readlink() does not add null termination */
388 /* account for binary path */
389 n = perf_env.nr_cmdline + 1;
391 ret = do_write(fd, &n, sizeof(n));
395 ret = do_write_string(fd, buf);
399 for (i = 0 ; i < perf_env.nr_cmdline; i++) {
400 ret = do_write_string(fd, perf_env.cmdline_argv[i]);
407 #define CORE_SIB_FMT \
408 "/sys/devices/system/cpu/cpu%d/topology/core_siblings_list"
409 #define THRD_SIB_FMT \
410 "/sys/devices/system/cpu/cpu%d/topology/thread_siblings_list"
416 char **core_siblings;
417 char **thread_siblings;
420 static int build_cpu_topo(struct cpu_topo *tp, int cpu)
423 char filename[MAXPATHLEN];
424 char *buf = NULL, *p;
430 sprintf(filename, CORE_SIB_FMT, cpu);
431 fp = fopen(filename, "r");
435 sret = getline(&buf, &len, fp);
440 p = strchr(buf, '\n');
444 for (i = 0; i < tp->core_sib; i++) {
445 if (!strcmp(buf, tp->core_siblings[i]))
448 if (i == tp->core_sib) {
449 tp->core_siblings[i] = buf;
457 sprintf(filename, THRD_SIB_FMT, cpu);
458 fp = fopen(filename, "r");
462 if (getline(&buf, &len, fp) <= 0)
465 p = strchr(buf, '\n');
469 for (i = 0; i < tp->thread_sib; i++) {
470 if (!strcmp(buf, tp->thread_siblings[i]))
473 if (i == tp->thread_sib) {
474 tp->thread_siblings[i] = buf;
486 static void free_cpu_topo(struct cpu_topo *tp)
493 for (i = 0 ; i < tp->core_sib; i++)
494 zfree(&tp->core_siblings[i]);
496 for (i = 0 ; i < tp->thread_sib; i++)
497 zfree(&tp->thread_siblings[i]);
502 static struct cpu_topo *build_cpu_topology(void)
504 struct cpu_topo *tp = NULL;
512 ncpus = cpu__max_present_cpu();
514 /* build online CPU map */
515 map = cpu_map__new(NULL);
517 pr_debug("failed to get system cpumap\n");
521 nr = (u32)(ncpus & UINT_MAX);
523 sz = nr * sizeof(char *);
524 addr = calloc(1, sizeof(*tp) + 2 * sz);
531 tp->core_siblings = addr;
533 tp->thread_siblings = addr;
535 for (i = 0; i < nr; i++) {
536 if (!cpu_map__has(map, i))
539 ret = build_cpu_topo(tp, i);
553 static int write_cpu_topology(int fd, struct perf_header *h __maybe_unused,
554 struct perf_evlist *evlist __maybe_unused)
560 tp = build_cpu_topology();
564 ret = do_write(fd, &tp->core_sib, sizeof(tp->core_sib));
568 for (i = 0; i < tp->core_sib; i++) {
569 ret = do_write_string(fd, tp->core_siblings[i]);
573 ret = do_write(fd, &tp->thread_sib, sizeof(tp->thread_sib));
577 for (i = 0; i < tp->thread_sib; i++) {
578 ret = do_write_string(fd, tp->thread_siblings[i]);
583 ret = perf_env__read_cpu_topology_map(&perf_env);
587 for (j = 0; j < perf_env.nr_cpus_avail; j++) {
588 ret = do_write(fd, &perf_env.cpu[j].core_id,
589 sizeof(perf_env.cpu[j].core_id));
592 ret = do_write(fd, &perf_env.cpu[j].socket_id,
593 sizeof(perf_env.cpu[j].socket_id));
604 static int write_total_mem(int fd, struct perf_header *h __maybe_unused,
605 struct perf_evlist *evlist __maybe_unused)
613 fp = fopen("/proc/meminfo", "r");
617 while (getline(&buf, &len, fp) > 0) {
618 ret = strncmp(buf, "MemTotal:", 9);
623 n = sscanf(buf, "%*s %"PRIu64, &mem);
625 ret = do_write(fd, &mem, sizeof(mem));
633 static int write_topo_node(int fd, int node)
635 char str[MAXPATHLEN];
637 char *buf = NULL, *p;
640 u64 mem_total, mem_free, mem;
643 sprintf(str, "/sys/devices/system/node/node%d/meminfo", node);
644 fp = fopen(str, "r");
648 while (getline(&buf, &len, fp) > 0) {
649 /* skip over invalid lines */
650 if (!strchr(buf, ':'))
652 if (sscanf(buf, "%*s %*d %31s %"PRIu64, field, &mem) != 2)
654 if (!strcmp(field, "MemTotal:"))
656 if (!strcmp(field, "MemFree:"))
663 ret = do_write(fd, &mem_total, sizeof(u64));
667 ret = do_write(fd, &mem_free, sizeof(u64));
672 sprintf(str, "/sys/devices/system/node/node%d/cpulist", node);
674 fp = fopen(str, "r");
678 if (getline(&buf, &len, fp) <= 0)
681 p = strchr(buf, '\n');
685 ret = do_write_string(fd, buf);
693 static int write_numa_topology(int fd, struct perf_header *h __maybe_unused,
694 struct perf_evlist *evlist __maybe_unused)
699 struct cpu_map *node_map = NULL;
704 fp = fopen("/sys/devices/system/node/online", "r");
708 if (getline(&buf, &len, fp) <= 0)
711 c = strchr(buf, '\n');
715 node_map = cpu_map__new(buf);
719 nr = (u32)node_map->nr;
721 ret = do_write(fd, &nr, sizeof(nr));
725 for (i = 0; i < nr; i++) {
726 j = (u32)node_map->map[i];
727 ret = do_write(fd, &j, sizeof(j));
731 ret = write_topo_node(fd, i);
738 cpu_map__put(node_map);
745 * struct pmu_mappings {
754 static int write_pmu_mappings(int fd, struct perf_header *h __maybe_unused,
755 struct perf_evlist *evlist __maybe_unused)
757 struct perf_pmu *pmu = NULL;
758 off_t offset = lseek(fd, 0, SEEK_CUR);
762 /* write real pmu_num later */
763 ret = do_write(fd, &pmu_num, sizeof(pmu_num));
767 while ((pmu = perf_pmu__scan(pmu))) {
772 ret = do_write(fd, &pmu->type, sizeof(pmu->type));
776 ret = do_write_string(fd, pmu->name);
781 if (pwrite(fd, &pmu_num, sizeof(pmu_num), offset) != sizeof(pmu_num)) {
783 lseek(fd, offset, SEEK_SET);
793 * struct group_descs {
795 * struct group_desc {
802 static int write_group_desc(int fd, struct perf_header *h __maybe_unused,
803 struct perf_evlist *evlist)
805 u32 nr_groups = evlist->nr_groups;
806 struct perf_evsel *evsel;
809 ret = do_write(fd, &nr_groups, sizeof(nr_groups));
813 evlist__for_each_entry(evlist, evsel) {
814 if (perf_evsel__is_group_leader(evsel) &&
815 evsel->nr_members > 1) {
816 const char *name = evsel->group_name ?: "{anon_group}";
817 u32 leader_idx = evsel->idx;
818 u32 nr_members = evsel->nr_members;
820 ret = do_write_string(fd, name);
824 ret = do_write(fd, &leader_idx, sizeof(leader_idx));
828 ret = do_write(fd, &nr_members, sizeof(nr_members));
837 * default get_cpuid(): nothing gets recorded
838 * actual implementation must be in arch/$(ARCH)/util/header.c
840 int __weak get_cpuid(char *buffer __maybe_unused, size_t sz __maybe_unused)
845 static int write_cpuid(int fd, struct perf_header *h __maybe_unused,
846 struct perf_evlist *evlist __maybe_unused)
851 ret = get_cpuid(buffer, sizeof(buffer));
857 return do_write_string(fd, buffer);
860 static int write_branch_stack(int fd __maybe_unused,
861 struct perf_header *h __maybe_unused,
862 struct perf_evlist *evlist __maybe_unused)
867 static int write_auxtrace(int fd, struct perf_header *h,
868 struct perf_evlist *evlist __maybe_unused)
870 struct perf_session *session;
873 session = container_of(h, struct perf_session, header);
875 err = auxtrace_index__write(fd, &session->auxtrace_index);
877 pr_err("Failed to write auxtrace index\n");
881 static int cpu_cache_level__sort(const void *a, const void *b)
883 struct cpu_cache_level *cache_a = (struct cpu_cache_level *)a;
884 struct cpu_cache_level *cache_b = (struct cpu_cache_level *)b;
886 return cache_a->level - cache_b->level;
889 static bool cpu_cache_level__cmp(struct cpu_cache_level *a, struct cpu_cache_level *b)
891 if (a->level != b->level)
894 if (a->line_size != b->line_size)
897 if (a->sets != b->sets)
900 if (a->ways != b->ways)
903 if (strcmp(a->type, b->type))
906 if (strcmp(a->size, b->size))
909 if (strcmp(a->map, b->map))
915 static int cpu_cache_level__read(struct cpu_cache_level *cache, u32 cpu, u16 level)
917 char path[PATH_MAX], file[PATH_MAX];
921 scnprintf(path, PATH_MAX, "devices/system/cpu/cpu%d/cache/index%d/", cpu, level);
922 scnprintf(file, PATH_MAX, "%s/%s", sysfs__mountpoint(), path);
927 scnprintf(file, PATH_MAX, "%s/level", path);
928 if (sysfs__read_int(file, (int *) &cache->level))
931 scnprintf(file, PATH_MAX, "%s/coherency_line_size", path);
932 if (sysfs__read_int(file, (int *) &cache->line_size))
935 scnprintf(file, PATH_MAX, "%s/number_of_sets", path);
936 if (sysfs__read_int(file, (int *) &cache->sets))
939 scnprintf(file, PATH_MAX, "%s/ways_of_associativity", path);
940 if (sysfs__read_int(file, (int *) &cache->ways))
943 scnprintf(file, PATH_MAX, "%s/type", path);
944 if (sysfs__read_str(file, &cache->type, &len))
947 cache->type[len] = 0;
948 cache->type = rtrim(cache->type);
950 scnprintf(file, PATH_MAX, "%s/size", path);
951 if (sysfs__read_str(file, &cache->size, &len)) {
956 cache->size[len] = 0;
957 cache->size = rtrim(cache->size);
959 scnprintf(file, PATH_MAX, "%s/shared_cpu_list", path);
960 if (sysfs__read_str(file, &cache->map, &len)) {
967 cache->map = rtrim(cache->map);
971 static void cpu_cache_level__fprintf(FILE *out, struct cpu_cache_level *c)
973 fprintf(out, "L%d %-15s %8s [%s]\n", c->level, c->type, c->size, c->map);
976 static int build_caches(struct cpu_cache_level caches[], u32 size, u32 *cntp)
983 ncpus = sysconf(_SC_NPROCESSORS_CONF);
987 nr = (u32)(ncpus & UINT_MAX);
989 for (cpu = 0; cpu < nr; cpu++) {
990 for (level = 0; level < 10; level++) {
991 struct cpu_cache_level c;
994 err = cpu_cache_level__read(&c, cpu, level);
1001 for (i = 0; i < cnt; i++) {
1002 if (cpu_cache_level__cmp(&c, &caches[i]))
1009 cpu_cache_level__free(&c);
1011 if (WARN_ONCE(cnt == size, "way too many cpu caches.."))
1020 #define MAX_CACHES 2000
1022 static int write_cache(int fd, struct perf_header *h __maybe_unused,
1023 struct perf_evlist *evlist __maybe_unused)
1025 struct cpu_cache_level caches[MAX_CACHES];
1026 u32 cnt = 0, i, version = 1;
1029 ret = build_caches(caches, MAX_CACHES, &cnt);
1033 qsort(&caches, cnt, sizeof(struct cpu_cache_level), cpu_cache_level__sort);
1035 ret = do_write(fd, &version, sizeof(u32));
1039 ret = do_write(fd, &cnt, sizeof(u32));
1043 for (i = 0; i < cnt; i++) {
1044 struct cpu_cache_level *c = &caches[i];
1047 ret = do_write(fd, &c->v, sizeof(u32)); \
1058 ret = do_write_string(fd, (const char *) c->v); \
1069 for (i = 0; i < cnt; i++)
1070 cpu_cache_level__free(&caches[i]);
1074 static int write_stat(int fd __maybe_unused,
1075 struct perf_header *h __maybe_unused,
1076 struct perf_evlist *evlist __maybe_unused)
1081 static void print_hostname(struct perf_header *ph, int fd __maybe_unused,
1084 fprintf(fp, "# hostname : %s\n", ph->env.hostname);
1087 static void print_osrelease(struct perf_header *ph, int fd __maybe_unused,
1090 fprintf(fp, "# os release : %s\n", ph->env.os_release);
1093 static void print_arch(struct perf_header *ph, int fd __maybe_unused, FILE *fp)
1095 fprintf(fp, "# arch : %s\n", ph->env.arch);
1098 static void print_cpudesc(struct perf_header *ph, int fd __maybe_unused,
1101 fprintf(fp, "# cpudesc : %s\n", ph->env.cpu_desc);
1104 static void print_nrcpus(struct perf_header *ph, int fd __maybe_unused,
1107 fprintf(fp, "# nrcpus online : %u\n", ph->env.nr_cpus_online);
1108 fprintf(fp, "# nrcpus avail : %u\n", ph->env.nr_cpus_avail);
1111 static void print_version(struct perf_header *ph, int fd __maybe_unused,
1114 fprintf(fp, "# perf version : %s\n", ph->env.version);
1117 static void print_cmdline(struct perf_header *ph, int fd __maybe_unused,
1122 nr = ph->env.nr_cmdline;
1124 fprintf(fp, "# cmdline : ");
1126 for (i = 0; i < nr; i++)
1127 fprintf(fp, "%s ", ph->env.cmdline_argv[i]);
1131 static void print_cpu_topology(struct perf_header *ph, int fd __maybe_unused,
1136 int cpu_nr = ph->env.nr_cpus_avail;
1138 nr = ph->env.nr_sibling_cores;
1139 str = ph->env.sibling_cores;
1141 for (i = 0; i < nr; i++) {
1142 fprintf(fp, "# sibling cores : %s\n", str);
1143 str += strlen(str) + 1;
1146 nr = ph->env.nr_sibling_threads;
1147 str = ph->env.sibling_threads;
1149 for (i = 0; i < nr; i++) {
1150 fprintf(fp, "# sibling threads : %s\n", str);
1151 str += strlen(str) + 1;
1154 if (ph->env.cpu != NULL) {
1155 for (i = 0; i < cpu_nr; i++)
1156 fprintf(fp, "# CPU %d: Core ID %d, Socket ID %d\n", i,
1157 ph->env.cpu[i].core_id, ph->env.cpu[i].socket_id);
1159 fprintf(fp, "# Core ID and Socket ID information is not available\n");
1162 static void free_event_desc(struct perf_evsel *events)
1164 struct perf_evsel *evsel;
1169 for (evsel = events; evsel->attr.size; evsel++) {
1170 zfree(&evsel->name);
1177 static struct perf_evsel *
1178 read_event_desc(struct perf_header *ph, int fd)
1180 struct perf_evsel *evsel, *events = NULL;
1183 u32 nre, sz, nr, i, j;
1187 /* number of events */
1188 ret = readn(fd, &nre, sizeof(nre));
1189 if (ret != (ssize_t)sizeof(nre))
1193 nre = bswap_32(nre);
1195 ret = readn(fd, &sz, sizeof(sz));
1196 if (ret != (ssize_t)sizeof(sz))
1202 /* buffer to hold on file attr struct */
1207 /* the last event terminates with evsel->attr.size == 0: */
1208 events = calloc(nre + 1, sizeof(*events));
1212 msz = sizeof(evsel->attr);
1216 for (i = 0, evsel = events; i < nre; evsel++, i++) {
1220 * must read entire on-file attr struct to
1221 * sync up with layout.
1223 ret = readn(fd, buf, sz);
1224 if (ret != (ssize_t)sz)
1228 perf_event__attr_swap(buf);
1230 memcpy(&evsel->attr, buf, msz);
1232 ret = readn(fd, &nr, sizeof(nr));
1233 if (ret != (ssize_t)sizeof(nr))
1236 if (ph->needs_swap) {
1238 evsel->needs_swap = true;
1241 evsel->name = do_read_string(fd, ph);
1246 id = calloc(nr, sizeof(*id));
1252 for (j = 0 ; j < nr; j++) {
1253 ret = readn(fd, id, sizeof(*id));
1254 if (ret != (ssize_t)sizeof(*id))
1257 *id = bswap_64(*id);
1265 free_event_desc(events);
1270 static int __desc_attr__fprintf(FILE *fp, const char *name, const char *val,
1271 void *priv __attribute__((unused)))
1273 return fprintf(fp, ", %s = %s", name, val);
1276 static void print_event_desc(struct perf_header *ph, int fd, FILE *fp)
1278 struct perf_evsel *evsel, *events = read_event_desc(ph, fd);
1283 fprintf(fp, "# event desc: not available or unable to read\n");
1287 for (evsel = events; evsel->attr.size; evsel++) {
1288 fprintf(fp, "# event : name = %s, ", evsel->name);
1291 fprintf(fp, ", id = {");
1292 for (j = 0, id = evsel->id; j < evsel->ids; j++, id++) {
1295 fprintf(fp, " %"PRIu64, *id);
1300 perf_event_attr__fprintf(fp, &evsel->attr, __desc_attr__fprintf, NULL);
1305 free_event_desc(events);
1308 static void print_total_mem(struct perf_header *ph, int fd __maybe_unused,
1311 fprintf(fp, "# total memory : %Lu kB\n", ph->env.total_mem);
1314 static void print_numa_topology(struct perf_header *ph, int fd __maybe_unused,
1318 struct numa_node *n;
1320 for (i = 0; i < ph->env.nr_numa_nodes; i++) {
1321 n = &ph->env.numa_nodes[i];
1323 fprintf(fp, "# node%u meminfo : total = %"PRIu64" kB,"
1324 " free = %"PRIu64" kB\n",
1325 n->node, n->mem_total, n->mem_free);
1327 fprintf(fp, "# node%u cpu list : ", n->node);
1328 cpu_map__fprintf(n->map, fp);
1332 static void print_cpuid(struct perf_header *ph, int fd __maybe_unused, FILE *fp)
1334 fprintf(fp, "# cpuid : %s\n", ph->env.cpuid);
1337 static void print_branch_stack(struct perf_header *ph __maybe_unused,
1338 int fd __maybe_unused, FILE *fp)
1340 fprintf(fp, "# contains samples with branch stack\n");
1343 static void print_auxtrace(struct perf_header *ph __maybe_unused,
1344 int fd __maybe_unused, FILE *fp)
1346 fprintf(fp, "# contains AUX area data (e.g. instruction trace)\n");
1349 static void print_stat(struct perf_header *ph __maybe_unused,
1350 int fd __maybe_unused, FILE *fp)
1352 fprintf(fp, "# contains stat data\n");
1355 static void print_cache(struct perf_header *ph __maybe_unused,
1356 int fd __maybe_unused, FILE *fp __maybe_unused)
1360 fprintf(fp, "# CPU cache info:\n");
1361 for (i = 0; i < ph->env.caches_cnt; i++) {
1363 cpu_cache_level__fprintf(fp, &ph->env.caches[i]);
1367 static void print_pmu_mappings(struct perf_header *ph, int fd __maybe_unused,
1370 const char *delimiter = "# pmu mappings: ";
1375 pmu_num = ph->env.nr_pmu_mappings;
1377 fprintf(fp, "# pmu mappings: not available\n");
1381 str = ph->env.pmu_mappings;
1384 type = strtoul(str, &tmp, 0);
1389 fprintf(fp, "%s%s = %" PRIu32, delimiter, str, type);
1392 str += strlen(str) + 1;
1401 fprintf(fp, "# pmu mappings: unable to read\n");
1404 static void print_group_desc(struct perf_header *ph, int fd __maybe_unused,
1407 struct perf_session *session;
1408 struct perf_evsel *evsel;
1411 session = container_of(ph, struct perf_session, header);
1413 evlist__for_each_entry(session->evlist, evsel) {
1414 if (perf_evsel__is_group_leader(evsel) &&
1415 evsel->nr_members > 1) {
1416 fprintf(fp, "# group: %s{%s", evsel->group_name ?: "",
1417 perf_evsel__name(evsel));
1419 nr = evsel->nr_members - 1;
1421 fprintf(fp, ",%s", perf_evsel__name(evsel));
1429 static int __event_process_build_id(struct build_id_event *bev,
1431 struct perf_session *session)
1434 struct machine *machine;
1437 enum dso_kernel_type dso_type;
1439 machine = perf_session__findnew_machine(session, bev->pid);
1443 cpumode = bev->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
1446 case PERF_RECORD_MISC_KERNEL:
1447 dso_type = DSO_TYPE_KERNEL;
1449 case PERF_RECORD_MISC_GUEST_KERNEL:
1450 dso_type = DSO_TYPE_GUEST_KERNEL;
1452 case PERF_RECORD_MISC_USER:
1453 case PERF_RECORD_MISC_GUEST_USER:
1454 dso_type = DSO_TYPE_USER;
1460 dso = machine__findnew_dso(machine, filename);
1462 char sbuild_id[SBUILD_ID_SIZE];
1464 dso__set_build_id(dso, &bev->build_id);
1466 if (!is_kernel_module(filename, cpumode))
1467 dso->kernel = dso_type;
1469 build_id__sprintf(dso->build_id, sizeof(dso->build_id),
1471 pr_debug("build id event received for %s: %s\n",
1472 dso->long_name, sbuild_id);
1481 static int perf_header__read_build_ids_abi_quirk(struct perf_header *header,
1482 int input, u64 offset, u64 size)
1484 struct perf_session *session = container_of(header, struct perf_session, header);
1486 struct perf_event_header header;
1487 u8 build_id[PERF_ALIGN(BUILD_ID_SIZE, sizeof(u64))];
1490 struct build_id_event bev;
1491 char filename[PATH_MAX];
1492 u64 limit = offset + size;
1494 while (offset < limit) {
1497 if (readn(input, &old_bev, sizeof(old_bev)) != sizeof(old_bev))
1500 if (header->needs_swap)
1501 perf_event_header__bswap(&old_bev.header);
1503 len = old_bev.header.size - sizeof(old_bev);
1504 if (readn(input, filename, len) != len)
1507 bev.header = old_bev.header;
1510 * As the pid is the missing value, we need to fill
1511 * it properly. The header.misc value give us nice hint.
1513 bev.pid = HOST_KERNEL_ID;
1514 if (bev.header.misc == PERF_RECORD_MISC_GUEST_USER ||
1515 bev.header.misc == PERF_RECORD_MISC_GUEST_KERNEL)
1516 bev.pid = DEFAULT_GUEST_KERNEL_ID;
1518 memcpy(bev.build_id, old_bev.build_id, sizeof(bev.build_id));
1519 __event_process_build_id(&bev, filename, session);
1521 offset += bev.header.size;
1527 static int perf_header__read_build_ids(struct perf_header *header,
1528 int input, u64 offset, u64 size)
1530 struct perf_session *session = container_of(header, struct perf_session, header);
1531 struct build_id_event bev;
1532 char filename[PATH_MAX];
1533 u64 limit = offset + size, orig_offset = offset;
1536 while (offset < limit) {
1539 if (readn(input, &bev, sizeof(bev)) != sizeof(bev))
1542 if (header->needs_swap)
1543 perf_event_header__bswap(&bev.header);
1545 len = bev.header.size - sizeof(bev);
1546 if (readn(input, filename, len) != len)
1549 * The a1645ce1 changeset:
1551 * "perf: 'perf kvm' tool for monitoring guest performance from host"
1553 * Added a field to struct build_id_event that broke the file
1556 * Since the kernel build-id is the first entry, process the
1557 * table using the old format if the well known
1558 * '[kernel.kallsyms]' string for the kernel build-id has the
1559 * first 4 characters chopped off (where the pid_t sits).
1561 if (memcmp(filename, "nel.kallsyms]", 13) == 0) {
1562 if (lseek(input, orig_offset, SEEK_SET) == (off_t)-1)
1564 return perf_header__read_build_ids_abi_quirk(header, input, offset, size);
1567 __event_process_build_id(&bev, filename, session);
1569 offset += bev.header.size;
1576 static int process_tracing_data(struct perf_file_section *section __maybe_unused,
1577 struct perf_header *ph __maybe_unused,
1580 ssize_t ret = trace_report(fd, data, false);
1581 return ret < 0 ? -1 : 0;
1584 static int process_build_id(struct perf_file_section *section,
1585 struct perf_header *ph, int fd,
1586 void *data __maybe_unused)
1588 if (perf_header__read_build_ids(ph, fd, section->offset, section->size))
1589 pr_debug("Failed to read buildids, continuing...\n");
1593 static int process_hostname(struct perf_file_section *section __maybe_unused,
1594 struct perf_header *ph, int fd,
1595 void *data __maybe_unused)
1597 ph->env.hostname = do_read_string(fd, ph);
1598 return ph->env.hostname ? 0 : -ENOMEM;
1601 static int process_osrelease(struct perf_file_section *section __maybe_unused,
1602 struct perf_header *ph, int fd,
1603 void *data __maybe_unused)
1605 ph->env.os_release = do_read_string(fd, ph);
1606 return ph->env.os_release ? 0 : -ENOMEM;
1609 static int process_version(struct perf_file_section *section __maybe_unused,
1610 struct perf_header *ph, int fd,
1611 void *data __maybe_unused)
1613 ph->env.version = do_read_string(fd, ph);
1614 return ph->env.version ? 0 : -ENOMEM;
1617 static int process_arch(struct perf_file_section *section __maybe_unused,
1618 struct perf_header *ph, int fd,
1619 void *data __maybe_unused)
1621 ph->env.arch = do_read_string(fd, ph);
1622 return ph->env.arch ? 0 : -ENOMEM;
1625 static int process_nrcpus(struct perf_file_section *section __maybe_unused,
1626 struct perf_header *ph, int fd,
1627 void *data __maybe_unused)
1632 ret = readn(fd, &nr, sizeof(nr));
1633 if (ret != sizeof(nr))
1639 ph->env.nr_cpus_avail = nr;
1641 ret = readn(fd, &nr, sizeof(nr));
1642 if (ret != sizeof(nr))
1648 ph->env.nr_cpus_online = nr;
1652 static int process_cpudesc(struct perf_file_section *section __maybe_unused,
1653 struct perf_header *ph, int fd,
1654 void *data __maybe_unused)
1656 ph->env.cpu_desc = do_read_string(fd, ph);
1657 return ph->env.cpu_desc ? 0 : -ENOMEM;
1660 static int process_cpuid(struct perf_file_section *section __maybe_unused,
1661 struct perf_header *ph, int fd,
1662 void *data __maybe_unused)
1664 ph->env.cpuid = do_read_string(fd, ph);
1665 return ph->env.cpuid ? 0 : -ENOMEM;
1668 static int process_total_mem(struct perf_file_section *section __maybe_unused,
1669 struct perf_header *ph, int fd,
1670 void *data __maybe_unused)
1675 ret = readn(fd, &mem, sizeof(mem));
1676 if (ret != sizeof(mem))
1680 mem = bswap_64(mem);
1682 ph->env.total_mem = mem;
1686 static struct perf_evsel *
1687 perf_evlist__find_by_index(struct perf_evlist *evlist, int idx)
1689 struct perf_evsel *evsel;
1691 evlist__for_each_entry(evlist, evsel) {
1692 if (evsel->idx == idx)
1700 perf_evlist__set_event_name(struct perf_evlist *evlist,
1701 struct perf_evsel *event)
1703 struct perf_evsel *evsel;
1708 evsel = perf_evlist__find_by_index(evlist, event->idx);
1715 evsel->name = strdup(event->name);
1719 process_event_desc(struct perf_file_section *section __maybe_unused,
1720 struct perf_header *header, int fd,
1721 void *data __maybe_unused)
1723 struct perf_session *session;
1724 struct perf_evsel *evsel, *events = read_event_desc(header, fd);
1729 session = container_of(header, struct perf_session, header);
1730 for (evsel = events; evsel->attr.size; evsel++)
1731 perf_evlist__set_event_name(session->evlist, evsel);
1733 free_event_desc(events);
1738 static int process_cmdline(struct perf_file_section *section,
1739 struct perf_header *ph, int fd,
1740 void *data __maybe_unused)
1743 char *str, *cmdline = NULL, **argv = NULL;
1746 ret = readn(fd, &nr, sizeof(nr));
1747 if (ret != sizeof(nr))
1753 ph->env.nr_cmdline = nr;
1755 cmdline = zalloc(section->size + nr + 1);
1759 argv = zalloc(sizeof(char *) * (nr + 1));
1763 for (i = 0; i < nr; i++) {
1764 str = do_read_string(fd, ph);
1768 argv[i] = cmdline + len;
1769 memcpy(argv[i], str, strlen(str) + 1);
1770 len += strlen(str) + 1;
1773 ph->env.cmdline = cmdline;
1774 ph->env.cmdline_argv = (const char **) argv;
1783 static int process_cpu_topology(struct perf_file_section *section,
1784 struct perf_header *ph, int fd,
1785 void *data __maybe_unused)
1791 int cpu_nr = ph->env.nr_cpus_avail;
1794 ph->env.cpu = calloc(cpu_nr, sizeof(*ph->env.cpu));
1798 ret = readn(fd, &nr, sizeof(nr));
1799 if (ret != sizeof(nr))
1805 ph->env.nr_sibling_cores = nr;
1806 size += sizeof(u32);
1807 if (strbuf_init(&sb, 128) < 0)
1810 for (i = 0; i < nr; i++) {
1811 str = do_read_string(fd, ph);
1815 /* include a NULL character at the end */
1816 if (strbuf_add(&sb, str, strlen(str) + 1) < 0)
1818 size += string_size(str);
1821 ph->env.sibling_cores = strbuf_detach(&sb, NULL);
1823 ret = readn(fd, &nr, sizeof(nr));
1824 if (ret != sizeof(nr))
1830 ph->env.nr_sibling_threads = nr;
1831 size += sizeof(u32);
1833 for (i = 0; i < nr; i++) {
1834 str = do_read_string(fd, ph);
1838 /* include a NULL character at the end */
1839 if (strbuf_add(&sb, str, strlen(str) + 1) < 0)
1841 size += string_size(str);
1844 ph->env.sibling_threads = strbuf_detach(&sb, NULL);
1847 * The header may be from old perf,
1848 * which doesn't include core id and socket id information.
1850 if (section->size <= size) {
1851 zfree(&ph->env.cpu);
1855 for (i = 0; i < (u32)cpu_nr; i++) {
1856 ret = readn(fd, &nr, sizeof(nr));
1857 if (ret != sizeof(nr))
1863 ph->env.cpu[i].core_id = nr;
1865 ret = readn(fd, &nr, sizeof(nr));
1866 if (ret != sizeof(nr))
1872 if (nr != (u32)-1 && nr > (u32)cpu_nr) {
1873 pr_debug("socket_id number is too big."
1874 "You may need to upgrade the perf tool.\n");
1878 ph->env.cpu[i].socket_id = nr;
1884 strbuf_release(&sb);
1886 zfree(&ph->env.cpu);
1890 static int process_numa_topology(struct perf_file_section *section __maybe_unused,
1891 struct perf_header *ph, int fd,
1892 void *data __maybe_unused)
1894 struct numa_node *nodes, *n;
1900 ret = readn(fd, &nr, sizeof(nr));
1901 if (ret != sizeof(nr))
1907 nodes = zalloc(sizeof(*nodes) * nr);
1911 for (i = 0; i < nr; i++) {
1915 ret = readn(fd, &n->node, sizeof(u32));
1916 if (ret != sizeof(n->node))
1919 ret = readn(fd, &n->mem_total, sizeof(u64));
1920 if (ret != sizeof(u64))
1923 ret = readn(fd, &n->mem_free, sizeof(u64));
1924 if (ret != sizeof(u64))
1927 if (ph->needs_swap) {
1928 n->node = bswap_32(n->node);
1929 n->mem_total = bswap_64(n->mem_total);
1930 n->mem_free = bswap_64(n->mem_free);
1933 str = do_read_string(fd, ph);
1937 n->map = cpu_map__new(str);
1943 ph->env.nr_numa_nodes = nr;
1944 ph->env.numa_nodes = nodes;
1952 static int process_pmu_mappings(struct perf_file_section *section __maybe_unused,
1953 struct perf_header *ph, int fd,
1954 void *data __maybe_unused)
1962 ret = readn(fd, &pmu_num, sizeof(pmu_num));
1963 if (ret != sizeof(pmu_num))
1967 pmu_num = bswap_32(pmu_num);
1970 pr_debug("pmu mappings not available\n");
1974 ph->env.nr_pmu_mappings = pmu_num;
1975 if (strbuf_init(&sb, 128) < 0)
1979 if (readn(fd, &type, sizeof(type)) != sizeof(type))
1982 type = bswap_32(type);
1984 name = do_read_string(fd, ph);
1988 if (strbuf_addf(&sb, "%u:%s", type, name) < 0)
1990 /* include a NULL character at the end */
1991 if (strbuf_add(&sb, "", 1) < 0)
1994 if (!strcmp(name, "msr"))
1995 ph->env.msr_pmu_type = type;
2000 ph->env.pmu_mappings = strbuf_detach(&sb, NULL);
2004 strbuf_release(&sb);
2008 static int process_group_desc(struct perf_file_section *section __maybe_unused,
2009 struct perf_header *ph, int fd,
2010 void *data __maybe_unused)
2013 u32 i, nr, nr_groups;
2014 struct perf_session *session;
2015 struct perf_evsel *evsel, *leader = NULL;
2022 if (readn(fd, &nr_groups, sizeof(nr_groups)) != sizeof(nr_groups))
2026 nr_groups = bswap_32(nr_groups);
2028 ph->env.nr_groups = nr_groups;
2030 pr_debug("group desc not available\n");
2034 desc = calloc(nr_groups, sizeof(*desc));
2038 for (i = 0; i < nr_groups; i++) {
2039 desc[i].name = do_read_string(fd, ph);
2043 if (readn(fd, &desc[i].leader_idx, sizeof(u32)) != sizeof(u32))
2046 if (readn(fd, &desc[i].nr_members, sizeof(u32)) != sizeof(u32))
2049 if (ph->needs_swap) {
2050 desc[i].leader_idx = bswap_32(desc[i].leader_idx);
2051 desc[i].nr_members = bswap_32(desc[i].nr_members);
2056 * Rebuild group relationship based on the group_desc
2058 session = container_of(ph, struct perf_session, header);
2059 session->evlist->nr_groups = nr_groups;
2062 evlist__for_each_entry(session->evlist, evsel) {
2063 if (evsel->idx == (int) desc[i].leader_idx) {
2064 evsel->leader = evsel;
2065 /* {anon_group} is a dummy name */
2066 if (strcmp(desc[i].name, "{anon_group}")) {
2067 evsel->group_name = desc[i].name;
2068 desc[i].name = NULL;
2070 evsel->nr_members = desc[i].nr_members;
2072 if (i >= nr_groups || nr > 0) {
2073 pr_debug("invalid group desc\n");
2078 nr = evsel->nr_members - 1;
2081 /* This is a group member */
2082 evsel->leader = leader;
2088 if (i != nr_groups || nr != 0) {
2089 pr_debug("invalid group desc\n");
2095 for (i = 0; i < nr_groups; i++)
2096 zfree(&desc[i].name);
2102 static int process_auxtrace(struct perf_file_section *section,
2103 struct perf_header *ph, int fd,
2104 void *data __maybe_unused)
2106 struct perf_session *session;
2109 session = container_of(ph, struct perf_session, header);
2111 err = auxtrace_index__process(fd, section->size, session,
2114 pr_err("Failed to process auxtrace index\n");
2118 static int process_cache(struct perf_file_section *section __maybe_unused,
2119 struct perf_header *ph __maybe_unused, int fd __maybe_unused,
2120 void *data __maybe_unused)
2122 struct cpu_cache_level *caches;
2123 u32 cnt, i, version;
2125 if (readn(fd, &version, sizeof(version)) != sizeof(version))
2129 version = bswap_32(version);
2134 if (readn(fd, &cnt, sizeof(cnt)) != sizeof(cnt))
2138 cnt = bswap_32(cnt);
2140 caches = zalloc(sizeof(*caches) * cnt);
2144 for (i = 0; i < cnt; i++) {
2145 struct cpu_cache_level c;
2148 if (readn(fd, &c.v, sizeof(u32)) != sizeof(u32))\
2149 goto out_free_caches; \
2150 if (ph->needs_swap) \
2151 c.v = bswap_32(c.v); \
2160 c.v = do_read_string(fd, ph); \
2162 goto out_free_caches;
2172 ph->env.caches = caches;
2173 ph->env.caches_cnt = cnt;
2180 struct feature_ops {
2181 int (*write)(int fd, struct perf_header *h, struct perf_evlist *evlist);
2182 void (*print)(struct perf_header *h, int fd, FILE *fp);
2183 int (*process)(struct perf_file_section *section,
2184 struct perf_header *h, int fd, void *data);
2189 #define FEAT_OPA(n, func) \
2190 [n] = { .name = #n, .write = write_##func, .print = print_##func }
2191 #define FEAT_OPP(n, func) \
2192 [n] = { .name = #n, .write = write_##func, .print = print_##func, \
2193 .process = process_##func }
2194 #define FEAT_OPF(n, func) \
2195 [n] = { .name = #n, .write = write_##func, .print = print_##func, \
2196 .process = process_##func, .full_only = true }
2198 /* feature_ops not implemented: */
2199 #define print_tracing_data NULL
2200 #define print_build_id NULL
2202 static const struct feature_ops feat_ops[HEADER_LAST_FEATURE] = {
2203 FEAT_OPP(HEADER_TRACING_DATA, tracing_data),
2204 FEAT_OPP(HEADER_BUILD_ID, build_id),
2205 FEAT_OPP(HEADER_HOSTNAME, hostname),
2206 FEAT_OPP(HEADER_OSRELEASE, osrelease),
2207 FEAT_OPP(HEADER_VERSION, version),
2208 FEAT_OPP(HEADER_ARCH, arch),
2209 FEAT_OPP(HEADER_NRCPUS, nrcpus),
2210 FEAT_OPP(HEADER_CPUDESC, cpudesc),
2211 FEAT_OPP(HEADER_CPUID, cpuid),
2212 FEAT_OPP(HEADER_TOTAL_MEM, total_mem),
2213 FEAT_OPP(HEADER_EVENT_DESC, event_desc),
2214 FEAT_OPP(HEADER_CMDLINE, cmdline),
2215 FEAT_OPF(HEADER_CPU_TOPOLOGY, cpu_topology),
2216 FEAT_OPF(HEADER_NUMA_TOPOLOGY, numa_topology),
2217 FEAT_OPA(HEADER_BRANCH_STACK, branch_stack),
2218 FEAT_OPP(HEADER_PMU_MAPPINGS, pmu_mappings),
2219 FEAT_OPP(HEADER_GROUP_DESC, group_desc),
2220 FEAT_OPP(HEADER_AUXTRACE, auxtrace),
2221 FEAT_OPA(HEADER_STAT, stat),
2222 FEAT_OPF(HEADER_CACHE, cache),
2225 struct header_print_data {
2227 bool full; /* extended list of headers */
2230 static int perf_file_section__fprintf_info(struct perf_file_section *section,
2231 struct perf_header *ph,
2232 int feat, int fd, void *data)
2234 struct header_print_data *hd = data;
2236 if (lseek(fd, section->offset, SEEK_SET) == (off_t)-1) {
2237 pr_debug("Failed to lseek to %" PRIu64 " offset for feature "
2238 "%d, continuing...\n", section->offset, feat);
2241 if (feat >= HEADER_LAST_FEATURE) {
2242 pr_warning("unknown feature %d\n", feat);
2245 if (!feat_ops[feat].print)
2248 if (!feat_ops[feat].full_only || hd->full)
2249 feat_ops[feat].print(ph, fd, hd->fp);
2251 fprintf(hd->fp, "# %s info available, use -I to display\n",
2252 feat_ops[feat].name);
2257 int perf_header__fprintf_info(struct perf_session *session, FILE *fp, bool full)
2259 struct header_print_data hd;
2260 struct perf_header *header = &session->header;
2261 int fd = perf_data_file__fd(session->file);
2268 ret = fstat(fd, &st);
2272 fprintf(fp, "# captured on: %s", ctime(&st.st_ctime));
2274 perf_header__process_sections(header, fd, &hd,
2275 perf_file_section__fprintf_info);
2277 fprintf(fp, "# missing features: ");
2278 for_each_clear_bit(bit, header->adds_features, HEADER_LAST_FEATURE) {
2280 fprintf(fp, "%s ", feat_ops[bit].name);
2287 static int do_write_feat(int fd, struct perf_header *h, int type,
2288 struct perf_file_section **p,
2289 struct perf_evlist *evlist)
2294 if (perf_header__has_feat(h, type)) {
2295 if (!feat_ops[type].write)
2298 (*p)->offset = lseek(fd, 0, SEEK_CUR);
2300 err = feat_ops[type].write(fd, h, evlist);
2302 pr_debug("failed to write feature %s\n", feat_ops[type].name);
2304 /* undo anything written */
2305 lseek(fd, (*p)->offset, SEEK_SET);
2309 (*p)->size = lseek(fd, 0, SEEK_CUR) - (*p)->offset;
2315 static int perf_header__adds_write(struct perf_header *header,
2316 struct perf_evlist *evlist, int fd)
2319 struct perf_file_section *feat_sec, *p;
2325 nr_sections = bitmap_weight(header->adds_features, HEADER_FEAT_BITS);
2329 feat_sec = p = calloc(nr_sections, sizeof(*feat_sec));
2330 if (feat_sec == NULL)
2333 sec_size = sizeof(*feat_sec) * nr_sections;
2335 sec_start = header->feat_offset;
2336 lseek(fd, sec_start + sec_size, SEEK_SET);
2338 for_each_set_bit(feat, header->adds_features, HEADER_FEAT_BITS) {
2339 if (do_write_feat(fd, header, feat, &p, evlist))
2340 perf_header__clear_feat(header, feat);
2343 lseek(fd, sec_start, SEEK_SET);
2345 * may write more than needed due to dropped feature, but
2346 * this is okay, reader will skip the mising entries
2348 err = do_write(fd, feat_sec, sec_size);
2350 pr_debug("failed to write feature section\n");
2355 int perf_header__write_pipe(int fd)
2357 struct perf_pipe_file_header f_header;
2360 f_header = (struct perf_pipe_file_header){
2361 .magic = PERF_MAGIC,
2362 .size = sizeof(f_header),
2365 err = do_write(fd, &f_header, sizeof(f_header));
2367 pr_debug("failed to write perf pipe header\n");
2374 int perf_session__write_header(struct perf_session *session,
2375 struct perf_evlist *evlist,
2376 int fd, bool at_exit)
2378 struct perf_file_header f_header;
2379 struct perf_file_attr f_attr;
2380 struct perf_header *header = &session->header;
2381 struct perf_evsel *evsel;
2385 lseek(fd, sizeof(f_header), SEEK_SET);
2387 evlist__for_each_entry(session->evlist, evsel) {
2388 evsel->id_offset = lseek(fd, 0, SEEK_CUR);
2389 err = do_write(fd, evsel->id, evsel->ids * sizeof(u64));
2391 pr_debug("failed to write perf header\n");
2396 attr_offset = lseek(fd, 0, SEEK_CUR);
2398 evlist__for_each_entry(evlist, evsel) {
2399 f_attr = (struct perf_file_attr){
2400 .attr = evsel->attr,
2402 .offset = evsel->id_offset,
2403 .size = evsel->ids * sizeof(u64),
2406 err = do_write(fd, &f_attr, sizeof(f_attr));
2408 pr_debug("failed to write perf header attribute\n");
2413 if (!header->data_offset)
2414 header->data_offset = lseek(fd, 0, SEEK_CUR);
2415 header->feat_offset = header->data_offset + header->data_size;
2418 err = perf_header__adds_write(header, evlist, fd);
2423 f_header = (struct perf_file_header){
2424 .magic = PERF_MAGIC,
2425 .size = sizeof(f_header),
2426 .attr_size = sizeof(f_attr),
2428 .offset = attr_offset,
2429 .size = evlist->nr_entries * sizeof(f_attr),
2432 .offset = header->data_offset,
2433 .size = header->data_size,
2435 /* event_types is ignored, store zeros */
2438 memcpy(&f_header.adds_features, &header->adds_features, sizeof(header->adds_features));
2440 lseek(fd, 0, SEEK_SET);
2441 err = do_write(fd, &f_header, sizeof(f_header));
2443 pr_debug("failed to write perf header\n");
2446 lseek(fd, header->data_offset + header->data_size, SEEK_SET);
2451 static int perf_header__getbuffer64(struct perf_header *header,
2452 int fd, void *buf, size_t size)
2454 if (readn(fd, buf, size) <= 0)
2457 if (header->needs_swap)
2458 mem_bswap_64(buf, size);
2463 int perf_header__process_sections(struct perf_header *header, int fd,
2465 int (*process)(struct perf_file_section *section,
2466 struct perf_header *ph,
2467 int feat, int fd, void *data))
2469 struct perf_file_section *feat_sec, *sec;
2475 nr_sections = bitmap_weight(header->adds_features, HEADER_FEAT_BITS);
2479 feat_sec = sec = calloc(nr_sections, sizeof(*feat_sec));
2483 sec_size = sizeof(*feat_sec) * nr_sections;
2485 lseek(fd, header->feat_offset, SEEK_SET);
2487 err = perf_header__getbuffer64(header, fd, feat_sec, sec_size);
2491 for_each_set_bit(feat, header->adds_features, HEADER_LAST_FEATURE) {
2492 err = process(sec++, header, feat, fd, data);
2502 static const int attr_file_abi_sizes[] = {
2503 [0] = PERF_ATTR_SIZE_VER0,
2504 [1] = PERF_ATTR_SIZE_VER1,
2505 [2] = PERF_ATTR_SIZE_VER2,
2506 [3] = PERF_ATTR_SIZE_VER3,
2507 [4] = PERF_ATTR_SIZE_VER4,
2512 * In the legacy file format, the magic number is not used to encode endianness.
2513 * hdr_sz was used to encode endianness. But given that hdr_sz can vary based
2514 * on ABI revisions, we need to try all combinations for all endianness to
2515 * detect the endianness.
2517 static int try_all_file_abis(uint64_t hdr_sz, struct perf_header *ph)
2519 uint64_t ref_size, attr_size;
2522 for (i = 0 ; attr_file_abi_sizes[i]; i++) {
2523 ref_size = attr_file_abi_sizes[i]
2524 + sizeof(struct perf_file_section);
2525 if (hdr_sz != ref_size) {
2526 attr_size = bswap_64(hdr_sz);
2527 if (attr_size != ref_size)
2530 ph->needs_swap = true;
2532 pr_debug("ABI%d perf.data file detected, need_swap=%d\n",
2537 /* could not determine endianness */
2541 #define PERF_PIPE_HDR_VER0 16
2543 static const size_t attr_pipe_abi_sizes[] = {
2544 [0] = PERF_PIPE_HDR_VER0,
2549 * In the legacy pipe format, there is an implicit assumption that endiannesss
2550 * between host recording the samples, and host parsing the samples is the
2551 * same. This is not always the case given that the pipe output may always be
2552 * redirected into a file and analyzed on a different machine with possibly a
2553 * different endianness and perf_event ABI revsions in the perf tool itself.
2555 static int try_all_pipe_abis(uint64_t hdr_sz, struct perf_header *ph)
2560 for (i = 0 ; attr_pipe_abi_sizes[i]; i++) {
2561 if (hdr_sz != attr_pipe_abi_sizes[i]) {
2562 attr_size = bswap_64(hdr_sz);
2563 if (attr_size != hdr_sz)
2566 ph->needs_swap = true;
2568 pr_debug("Pipe ABI%d perf.data file detected\n", i);
2574 bool is_perf_magic(u64 magic)
2576 if (!memcmp(&magic, __perf_magic1, sizeof(magic))
2577 || magic == __perf_magic2
2578 || magic == __perf_magic2_sw)
2584 static int check_magic_endian(u64 magic, uint64_t hdr_sz,
2585 bool is_pipe, struct perf_header *ph)
2589 /* check for legacy format */
2590 ret = memcmp(&magic, __perf_magic1, sizeof(magic));
2592 ph->version = PERF_HEADER_VERSION_1;
2593 pr_debug("legacy perf.data format\n");
2595 return try_all_pipe_abis(hdr_sz, ph);
2597 return try_all_file_abis(hdr_sz, ph);
2600 * the new magic number serves two purposes:
2601 * - unique number to identify actual perf.data files
2602 * - encode endianness of file
2604 ph->version = PERF_HEADER_VERSION_2;
2606 /* check magic number with one endianness */
2607 if (magic == __perf_magic2)
2610 /* check magic number with opposite endianness */
2611 if (magic != __perf_magic2_sw)
2614 ph->needs_swap = true;
2619 int perf_file_header__read(struct perf_file_header *header,
2620 struct perf_header *ph, int fd)
2624 lseek(fd, 0, SEEK_SET);
2626 ret = readn(fd, header, sizeof(*header));
2630 if (check_magic_endian(header->magic,
2631 header->attr_size, false, ph) < 0) {
2632 pr_debug("magic/endian check failed\n");
2636 if (ph->needs_swap) {
2637 mem_bswap_64(header, offsetof(struct perf_file_header,
2641 if (header->size != sizeof(*header)) {
2642 /* Support the previous format */
2643 if (header->size == offsetof(typeof(*header), adds_features))
2644 bitmap_zero(header->adds_features, HEADER_FEAT_BITS);
2647 } else if (ph->needs_swap) {
2649 * feature bitmap is declared as an array of unsigned longs --
2650 * not good since its size can differ between the host that
2651 * generated the data file and the host analyzing the file.
2653 * We need to handle endianness, but we don't know the size of
2654 * the unsigned long where the file was generated. Take a best
2655 * guess at determining it: try 64-bit swap first (ie., file
2656 * created on a 64-bit host), and check if the hostname feature
2657 * bit is set (this feature bit is forced on as of fbe96f2).
2658 * If the bit is not, undo the 64-bit swap and try a 32-bit
2659 * swap. If the hostname bit is still not set (e.g., older data
2660 * file), punt and fallback to the original behavior --
2661 * clearing all feature bits and setting buildid.
2663 mem_bswap_64(&header->adds_features,
2664 BITS_TO_U64(HEADER_FEAT_BITS));
2666 if (!test_bit(HEADER_HOSTNAME, header->adds_features)) {
2668 mem_bswap_64(&header->adds_features,
2669 BITS_TO_U64(HEADER_FEAT_BITS));
2672 mem_bswap_32(&header->adds_features,
2673 BITS_TO_U32(HEADER_FEAT_BITS));
2676 if (!test_bit(HEADER_HOSTNAME, header->adds_features)) {
2677 bitmap_zero(header->adds_features, HEADER_FEAT_BITS);
2678 set_bit(HEADER_BUILD_ID, header->adds_features);
2682 memcpy(&ph->adds_features, &header->adds_features,
2683 sizeof(ph->adds_features));
2685 ph->data_offset = header->data.offset;
2686 ph->data_size = header->data.size;
2687 ph->feat_offset = header->data.offset + header->data.size;
2691 static int perf_file_section__process(struct perf_file_section *section,
2692 struct perf_header *ph,
2693 int feat, int fd, void *data)
2695 if (lseek(fd, section->offset, SEEK_SET) == (off_t)-1) {
2696 pr_debug("Failed to lseek to %" PRIu64 " offset for feature "
2697 "%d, continuing...\n", section->offset, feat);
2701 if (feat >= HEADER_LAST_FEATURE) {
2702 pr_debug("unknown feature %d, continuing...\n", feat);
2706 if (!feat_ops[feat].process)
2709 return feat_ops[feat].process(section, ph, fd, data);
2712 static int perf_file_header__read_pipe(struct perf_pipe_file_header *header,
2713 struct perf_header *ph, int fd,
2718 ret = readn(fd, header, sizeof(*header));
2722 if (check_magic_endian(header->magic, header->size, true, ph) < 0) {
2723 pr_debug("endian/magic failed\n");
2728 header->size = bswap_64(header->size);
2730 if (repipe && do_write(STDOUT_FILENO, header, sizeof(*header)) < 0)
2736 static int perf_header__read_pipe(struct perf_session *session)
2738 struct perf_header *header = &session->header;
2739 struct perf_pipe_file_header f_header;
2741 if (perf_file_header__read_pipe(&f_header, header,
2742 perf_data_file__fd(session->file),
2743 session->repipe) < 0) {
2744 pr_debug("incompatible file format\n");
2751 static int read_attr(int fd, struct perf_header *ph,
2752 struct perf_file_attr *f_attr)
2754 struct perf_event_attr *attr = &f_attr->attr;
2756 size_t our_sz = sizeof(f_attr->attr);
2759 memset(f_attr, 0, sizeof(*f_attr));
2761 /* read minimal guaranteed structure */
2762 ret = readn(fd, attr, PERF_ATTR_SIZE_VER0);
2764 pr_debug("cannot read %d bytes of header attr\n",
2765 PERF_ATTR_SIZE_VER0);
2769 /* on file perf_event_attr size */
2777 sz = PERF_ATTR_SIZE_VER0;
2778 } else if (sz > our_sz) {
2779 pr_debug("file uses a more recent and unsupported ABI"
2780 " (%zu bytes extra)\n", sz - our_sz);
2783 /* what we have not yet read and that we know about */
2784 left = sz - PERF_ATTR_SIZE_VER0;
2787 ptr += PERF_ATTR_SIZE_VER0;
2789 ret = readn(fd, ptr, left);
2791 /* read perf_file_section, ids are read in caller */
2792 ret = readn(fd, &f_attr->ids, sizeof(f_attr->ids));
2794 return ret <= 0 ? -1 : 0;
2797 static int perf_evsel__prepare_tracepoint_event(struct perf_evsel *evsel,
2798 struct pevent *pevent)
2800 struct event_format *event;
2803 /* already prepared */
2804 if (evsel->tp_format)
2807 if (pevent == NULL) {
2808 pr_debug("broken or missing trace data\n");
2812 event = pevent_find_event(pevent, evsel->attr.config);
2813 if (event == NULL) {
2814 pr_debug("cannot find event format for %d\n", (int)evsel->attr.config);
2819 snprintf(bf, sizeof(bf), "%s:%s", event->system, event->name);
2820 evsel->name = strdup(bf);
2821 if (evsel->name == NULL)
2825 evsel->tp_format = event;
2829 static int perf_evlist__prepare_tracepoint_events(struct perf_evlist *evlist,
2830 struct pevent *pevent)
2832 struct perf_evsel *pos;
2834 evlist__for_each_entry(evlist, pos) {
2835 if (pos->attr.type == PERF_TYPE_TRACEPOINT &&
2836 perf_evsel__prepare_tracepoint_event(pos, pevent))
2843 int perf_session__read_header(struct perf_session *session)
2845 struct perf_data_file *file = session->file;
2846 struct perf_header *header = &session->header;
2847 struct perf_file_header f_header;
2848 struct perf_file_attr f_attr;
2850 int nr_attrs, nr_ids, i, j;
2851 int fd = perf_data_file__fd(file);
2853 session->evlist = perf_evlist__new();
2854 if (session->evlist == NULL)
2857 session->evlist->env = &header->env;
2858 session->machines.host.env = &header->env;
2859 if (perf_data_file__is_pipe(file))
2860 return perf_header__read_pipe(session);
2862 if (perf_file_header__read(&f_header, header, fd) < 0)
2866 * Sanity check that perf.data was written cleanly; data size is
2867 * initialized to 0 and updated only if the on_exit function is run.
2868 * If data size is still 0 then the file contains only partial
2869 * information. Just warn user and process it as much as it can.
2871 if (f_header.data.size == 0) {
2872 pr_warning("WARNING: The %s file's data size field is 0 which is unexpected.\n"
2873 "Was the 'perf record' command properly terminated?\n",
2877 nr_attrs = f_header.attrs.size / f_header.attr_size;
2878 lseek(fd, f_header.attrs.offset, SEEK_SET);
2880 for (i = 0; i < nr_attrs; i++) {
2881 struct perf_evsel *evsel;
2884 if (read_attr(fd, header, &f_attr) < 0)
2887 if (header->needs_swap) {
2888 f_attr.ids.size = bswap_64(f_attr.ids.size);
2889 f_attr.ids.offset = bswap_64(f_attr.ids.offset);
2890 perf_event__attr_swap(&f_attr.attr);
2893 tmp = lseek(fd, 0, SEEK_CUR);
2894 evsel = perf_evsel__new(&f_attr.attr);
2897 goto out_delete_evlist;
2899 evsel->needs_swap = header->needs_swap;
2901 * Do it before so that if perf_evsel__alloc_id fails, this
2902 * entry gets purged too at perf_evlist__delete().
2904 perf_evlist__add(session->evlist, evsel);
2906 nr_ids = f_attr.ids.size / sizeof(u64);
2908 * We don't have the cpu and thread maps on the header, so
2909 * for allocating the perf_sample_id table we fake 1 cpu and
2910 * hattr->ids threads.
2912 if (perf_evsel__alloc_id(evsel, 1, nr_ids))
2913 goto out_delete_evlist;
2915 lseek(fd, f_attr.ids.offset, SEEK_SET);
2917 for (j = 0; j < nr_ids; j++) {
2918 if (perf_header__getbuffer64(header, fd, &f_id, sizeof(f_id)))
2921 perf_evlist__id_add(session->evlist, evsel, 0, j, f_id);
2924 lseek(fd, tmp, SEEK_SET);
2927 symbol_conf.nr_events = nr_attrs;
2929 perf_header__process_sections(header, fd, &session->tevent,
2930 perf_file_section__process);
2932 if (perf_evlist__prepare_tracepoint_events(session->evlist,
2933 session->tevent.pevent))
2934 goto out_delete_evlist;
2941 perf_evlist__delete(session->evlist);
2942 session->evlist = NULL;
2946 int perf_event__synthesize_attr(struct perf_tool *tool,
2947 struct perf_event_attr *attr, u32 ids, u64 *id,
2948 perf_event__handler_t process)
2950 union perf_event *ev;
2954 size = sizeof(struct perf_event_attr);
2955 size = PERF_ALIGN(size, sizeof(u64));
2956 size += sizeof(struct perf_event_header);
2957 size += ids * sizeof(u64);
2964 ev->attr.attr = *attr;
2965 memcpy(ev->attr.id, id, ids * sizeof(u64));
2967 ev->attr.header.type = PERF_RECORD_HEADER_ATTR;
2968 ev->attr.header.size = (u16)size;
2970 if (ev->attr.header.size == size)
2971 err = process(tool, ev, NULL, NULL);
2980 static struct event_update_event *
2981 event_update_event__new(size_t size, u64 type, u64 id)
2983 struct event_update_event *ev;
2985 size += sizeof(*ev);
2986 size = PERF_ALIGN(size, sizeof(u64));
2990 ev->header.type = PERF_RECORD_EVENT_UPDATE;
2991 ev->header.size = (u16)size;
2999 perf_event__synthesize_event_update_unit(struct perf_tool *tool,
3000 struct perf_evsel *evsel,
3001 perf_event__handler_t process)
3003 struct event_update_event *ev;
3004 size_t size = strlen(evsel->unit);
3007 ev = event_update_event__new(size + 1, PERF_EVENT_UPDATE__UNIT, evsel->id[0]);
3011 strncpy(ev->data, evsel->unit, size);
3012 err = process(tool, (union perf_event *)ev, NULL, NULL);
3018 perf_event__synthesize_event_update_scale(struct perf_tool *tool,
3019 struct perf_evsel *evsel,
3020 perf_event__handler_t process)
3022 struct event_update_event *ev;
3023 struct event_update_event_scale *ev_data;
3026 ev = event_update_event__new(sizeof(*ev_data), PERF_EVENT_UPDATE__SCALE, evsel->id[0]);
3030 ev_data = (struct event_update_event_scale *) ev->data;
3031 ev_data->scale = evsel->scale;
3032 err = process(tool, (union perf_event*) ev, NULL, NULL);
3038 perf_event__synthesize_event_update_name(struct perf_tool *tool,
3039 struct perf_evsel *evsel,
3040 perf_event__handler_t process)
3042 struct event_update_event *ev;
3043 size_t len = strlen(evsel->name);
3046 ev = event_update_event__new(len + 1, PERF_EVENT_UPDATE__NAME, evsel->id[0]);
3050 strncpy(ev->data, evsel->name, len);
3051 err = process(tool, (union perf_event*) ev, NULL, NULL);
3057 perf_event__synthesize_event_update_cpus(struct perf_tool *tool,
3058 struct perf_evsel *evsel,
3059 perf_event__handler_t process)
3061 size_t size = sizeof(struct event_update_event);
3062 struct event_update_event *ev;
3066 if (!evsel->own_cpus)
3069 ev = cpu_map_data__alloc(evsel->own_cpus, &size, &type, &max);
3073 ev->header.type = PERF_RECORD_EVENT_UPDATE;
3074 ev->header.size = (u16)size;
3075 ev->type = PERF_EVENT_UPDATE__CPUS;
3076 ev->id = evsel->id[0];
3078 cpu_map_data__synthesize((struct cpu_map_data *) ev->data,
3082 err = process(tool, (union perf_event*) ev, NULL, NULL);
3087 size_t perf_event__fprintf_event_update(union perf_event *event, FILE *fp)
3089 struct event_update_event *ev = &event->event_update;
3090 struct event_update_event_scale *ev_scale;
3091 struct event_update_event_cpus *ev_cpus;
3092 struct cpu_map *map;
3095 ret = fprintf(fp, "\n... id: %" PRIu64 "\n", ev->id);
3098 case PERF_EVENT_UPDATE__SCALE:
3099 ev_scale = (struct event_update_event_scale *) ev->data;
3100 ret += fprintf(fp, "... scale: %f\n", ev_scale->scale);
3102 case PERF_EVENT_UPDATE__UNIT:
3103 ret += fprintf(fp, "... unit: %s\n", ev->data);
3105 case PERF_EVENT_UPDATE__NAME:
3106 ret += fprintf(fp, "... name: %s\n", ev->data);
3108 case PERF_EVENT_UPDATE__CPUS:
3109 ev_cpus = (struct event_update_event_cpus *) ev->data;
3110 ret += fprintf(fp, "... ");
3112 map = cpu_map__new_data(&ev_cpus->cpus);
3114 ret += cpu_map__fprintf(map, fp);
3116 ret += fprintf(fp, "failed to get cpus\n");
3119 ret += fprintf(fp, "... unknown type\n");
3126 int perf_event__synthesize_attrs(struct perf_tool *tool,
3127 struct perf_session *session,
3128 perf_event__handler_t process)
3130 struct perf_evsel *evsel;
3133 evlist__for_each_entry(session->evlist, evsel) {
3134 err = perf_event__synthesize_attr(tool, &evsel->attr, evsel->ids,
3135 evsel->id, process);
3137 pr_debug("failed to create perf header attribute\n");
3145 int perf_event__process_attr(struct perf_tool *tool __maybe_unused,
3146 union perf_event *event,
3147 struct perf_evlist **pevlist)
3150 struct perf_evsel *evsel;
3151 struct perf_evlist *evlist = *pevlist;
3153 if (evlist == NULL) {
3154 *pevlist = evlist = perf_evlist__new();
3159 evsel = perf_evsel__new(&event->attr.attr);
3163 perf_evlist__add(evlist, evsel);
3165 ids = event->header.size;
3166 ids -= (void *)&event->attr.id - (void *)event;
3167 n_ids = ids / sizeof(u64);
3169 * We don't have the cpu and thread maps on the header, so
3170 * for allocating the perf_sample_id table we fake 1 cpu and
3171 * hattr->ids threads.
3173 if (perf_evsel__alloc_id(evsel, 1, n_ids))
3176 for (i = 0; i < n_ids; i++) {
3177 perf_evlist__id_add(evlist, evsel, 0, i, event->attr.id[i]);
3180 symbol_conf.nr_events = evlist->nr_entries;
3185 int perf_event__process_event_update(struct perf_tool *tool __maybe_unused,
3186 union perf_event *event,
3187 struct perf_evlist **pevlist)
3189 struct event_update_event *ev = &event->event_update;
3190 struct event_update_event_scale *ev_scale;
3191 struct event_update_event_cpus *ev_cpus;
3192 struct perf_evlist *evlist;
3193 struct perf_evsel *evsel;
3194 struct cpu_map *map;
3196 if (!pevlist || *pevlist == NULL)
3201 evsel = perf_evlist__id2evsel(evlist, ev->id);
3206 case PERF_EVENT_UPDATE__UNIT:
3207 evsel->unit = strdup(ev->data);
3209 case PERF_EVENT_UPDATE__NAME:
3210 evsel->name = strdup(ev->data);
3212 case PERF_EVENT_UPDATE__SCALE:
3213 ev_scale = (struct event_update_event_scale *) ev->data;
3214 evsel->scale = ev_scale->scale;
3216 case PERF_EVENT_UPDATE__CPUS:
3217 ev_cpus = (struct event_update_event_cpus *) ev->data;
3219 map = cpu_map__new_data(&ev_cpus->cpus);
3221 evsel->own_cpus = map;
3223 pr_err("failed to get event_update cpus\n");
3231 int perf_event__synthesize_tracing_data(struct perf_tool *tool, int fd,
3232 struct perf_evlist *evlist,
3233 perf_event__handler_t process)
3235 union perf_event ev;
3236 struct tracing_data *tdata;
3237 ssize_t size = 0, aligned_size = 0, padding;
3238 int err __maybe_unused = 0;
3241 * We are going to store the size of the data followed
3242 * by the data contents. Since the fd descriptor is a pipe,
3243 * we cannot seek back to store the size of the data once
3244 * we know it. Instead we:
3246 * - write the tracing data to the temp file
3247 * - get/write the data size to pipe
3248 * - write the tracing data from the temp file
3251 tdata = tracing_data_get(&evlist->entries, fd, true);
3255 memset(&ev, 0, sizeof(ev));
3257 ev.tracing_data.header.type = PERF_RECORD_HEADER_TRACING_DATA;
3259 aligned_size = PERF_ALIGN(size, sizeof(u64));
3260 padding = aligned_size - size;
3261 ev.tracing_data.header.size = sizeof(ev.tracing_data);
3262 ev.tracing_data.size = aligned_size;
3264 process(tool, &ev, NULL, NULL);
3267 * The put function will copy all the tracing data
3268 * stored in temp file to the pipe.
3270 tracing_data_put(tdata);
3272 write_padded(fd, NULL, 0, padding);
3274 return aligned_size;
3277 int perf_event__process_tracing_data(struct perf_tool *tool __maybe_unused,
3278 union perf_event *event,
3279 struct perf_session *session)
3281 ssize_t size_read, padding, size = event->tracing_data.size;
3282 int fd = perf_data_file__fd(session->file);
3283 off_t offset = lseek(fd, 0, SEEK_CUR);
3286 /* setup for reading amidst mmap */
3287 lseek(fd, offset + sizeof(struct tracing_data_event),
3290 size_read = trace_report(fd, &session->tevent,
3292 padding = PERF_ALIGN(size_read, sizeof(u64)) - size_read;
3294 if (readn(fd, buf, padding) < 0) {
3295 pr_err("%s: reading input file", __func__);
3298 if (session->repipe) {
3299 int retw = write(STDOUT_FILENO, buf, padding);
3300 if (retw <= 0 || retw != padding) {
3301 pr_err("%s: repiping tracing data padding", __func__);
3306 if (size_read + padding != size) {
3307 pr_err("%s: tracing data size mismatch", __func__);
3311 perf_evlist__prepare_tracepoint_events(session->evlist,
3312 session->tevent.pevent);
3314 return size_read + padding;
3317 int perf_event__synthesize_build_id(struct perf_tool *tool,
3318 struct dso *pos, u16 misc,
3319 perf_event__handler_t process,
3320 struct machine *machine)
3322 union perf_event ev;
3329 memset(&ev, 0, sizeof(ev));
3331 len = pos->long_name_len + 1;
3332 len = PERF_ALIGN(len, NAME_ALIGN);
3333 memcpy(&ev.build_id.build_id, pos->build_id, sizeof(pos->build_id));
3334 ev.build_id.header.type = PERF_RECORD_HEADER_BUILD_ID;
3335 ev.build_id.header.misc = misc;
3336 ev.build_id.pid = machine->pid;
3337 ev.build_id.header.size = sizeof(ev.build_id) + len;
3338 memcpy(&ev.build_id.filename, pos->long_name, pos->long_name_len);
3340 err = process(tool, &ev, NULL, machine);
3345 int perf_event__process_build_id(struct perf_tool *tool __maybe_unused,
3346 union perf_event *event,
3347 struct perf_session *session)
3349 __event_process_build_id(&event->build_id,
3350 event->build_id.filename,