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-rw-r--r--tools/perf/util/header.c4127
1 files changed, 4127 insertions, 0 deletions
diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c
new file mode 100644
index 000000000..d2812d989
--- /dev/null
+++ b/tools/perf/util/header.c
@@ -0,0 +1,4127 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <errno.h>
+#include <inttypes.h>
+#include "string2.h"
+#include <sys/param.h>
+#include <sys/types.h>
+#include <byteswap.h>
+#include <unistd.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <linux/compiler.h>
+#include <linux/list.h>
+#include <linux/kernel.h>
+#include <linux/bitops.h>
+#include <linux/string.h>
+#include <linux/stringify.h>
+#include <linux/zalloc.h>
+#include <sys/stat.h>
+#include <sys/utsname.h>
+#include <linux/time64.h>
+#include <dirent.h>
+#include <bpf/libbpf.h>
+#include <perf/cpumap.h>
+
+#include "dso.h"
+#include "evlist.h"
+#include "evsel.h"
+#include "util/evsel_fprintf.h"
+#include "header.h"
+#include "memswap.h"
+#include "trace-event.h"
+#include "session.h"
+#include "symbol.h"
+#include "debug.h"
+#include "cpumap.h"
+#include "pmu.h"
+#include "vdso.h"
+#include "strbuf.h"
+#include "build-id.h"
+#include "data.h"
+#include <api/fs/fs.h>
+#include "asm/bug.h"
+#include "tool.h"
+#include "time-utils.h"
+#include "units.h"
+#include "util/util.h" // perf_exe()
+#include "cputopo.h"
+#include "bpf-event.h"
+#include "clockid.h"
+
+#include <linux/ctype.h>
+#include <internal/lib.h>
+
+/*
+ * magic2 = "PERFILE2"
+ * must be a numerical value to let the endianness
+ * determine the memory layout. That way we are able
+ * to detect endianness when reading the perf.data file
+ * back.
+ *
+ * we check for legacy (PERFFILE) format.
+ */
+static const char *__perf_magic1 = "PERFFILE";
+static const u64 __perf_magic2 = 0x32454c4946524550ULL;
+static const u64 __perf_magic2_sw = 0x50455246494c4532ULL;
+
+#define PERF_MAGIC __perf_magic2
+
+const char perf_version_string[] = PERF_VERSION;
+
+struct perf_file_attr {
+ struct perf_event_attr attr;
+ struct perf_file_section ids;
+};
+
+void perf_header__set_feat(struct perf_header *header, int feat)
+{
+ set_bit(feat, header->adds_features);
+}
+
+void perf_header__clear_feat(struct perf_header *header, int feat)
+{
+ clear_bit(feat, header->adds_features);
+}
+
+bool perf_header__has_feat(const struct perf_header *header, int feat)
+{
+ return test_bit(feat, header->adds_features);
+}
+
+static int __do_write_fd(struct feat_fd *ff, const void *buf, size_t size)
+{
+ ssize_t ret = writen(ff->fd, buf, size);
+
+ if (ret != (ssize_t)size)
+ return ret < 0 ? (int)ret : -1;
+ return 0;
+}
+
+static int __do_write_buf(struct feat_fd *ff, const void *buf, size_t size)
+{
+ /* struct perf_event_header::size is u16 */
+ const size_t max_size = 0xffff - sizeof(struct perf_event_header);
+ size_t new_size = ff->size;
+ void *addr;
+
+ if (size + ff->offset > max_size)
+ return -E2BIG;
+
+ while (size > (new_size - ff->offset))
+ new_size <<= 1;
+ new_size = min(max_size, new_size);
+
+ if (ff->size < new_size) {
+ addr = realloc(ff->buf, new_size);
+ if (!addr)
+ return -ENOMEM;
+ ff->buf = addr;
+ ff->size = new_size;
+ }
+
+ memcpy(ff->buf + ff->offset, buf, size);
+ ff->offset += size;
+
+ return 0;
+}
+
+/* Return: 0 if succeded, -ERR if failed. */
+int do_write(struct feat_fd *ff, const void *buf, size_t size)
+{
+ if (!ff->buf)
+ return __do_write_fd(ff, buf, size);
+ return __do_write_buf(ff, buf, size);
+}
+
+/* Return: 0 if succeded, -ERR if failed. */
+static int do_write_bitmap(struct feat_fd *ff, unsigned long *set, u64 size)
+{
+ u64 *p = (u64 *) set;
+ int i, ret;
+
+ ret = do_write(ff, &size, sizeof(size));
+ if (ret < 0)
+ return ret;
+
+ for (i = 0; (u64) i < BITS_TO_U64(size); i++) {
+ ret = do_write(ff, p + i, sizeof(*p));
+ if (ret < 0)
+ return ret;
+ }
+
+ return 0;
+}
+
+/* Return: 0 if succeded, -ERR if failed. */
+int write_padded(struct feat_fd *ff, const void *bf,
+ size_t count, size_t count_aligned)
+{
+ static const char zero_buf[NAME_ALIGN];
+ int err = do_write(ff, bf, count);
+
+ if (!err)
+ err = do_write(ff, zero_buf, count_aligned - count);
+
+ return err;
+}
+
+#define string_size(str) \
+ (PERF_ALIGN((strlen(str) + 1), NAME_ALIGN) + sizeof(u32))
+
+/* Return: 0 if succeded, -ERR if failed. */
+static int do_write_string(struct feat_fd *ff, const char *str)
+{
+ u32 len, olen;
+ int ret;
+
+ olen = strlen(str) + 1;
+ len = PERF_ALIGN(olen, NAME_ALIGN);
+
+ /* write len, incl. \0 */
+ ret = do_write(ff, &len, sizeof(len));
+ if (ret < 0)
+ return ret;
+
+ return write_padded(ff, str, olen, len);
+}
+
+static int __do_read_fd(struct feat_fd *ff, void *addr, ssize_t size)
+{
+ ssize_t ret = readn(ff->fd, addr, size);
+
+ if (ret != size)
+ return ret < 0 ? (int)ret : -1;
+ return 0;
+}
+
+static int __do_read_buf(struct feat_fd *ff, void *addr, ssize_t size)
+{
+ if (size > (ssize_t)ff->size - ff->offset)
+ return -1;
+
+ memcpy(addr, ff->buf + ff->offset, size);
+ ff->offset += size;
+
+ return 0;
+
+}
+
+static int __do_read(struct feat_fd *ff, void *addr, ssize_t size)
+{
+ if (!ff->buf)
+ return __do_read_fd(ff, addr, size);
+ return __do_read_buf(ff, addr, size);
+}
+
+static int do_read_u32(struct feat_fd *ff, u32 *addr)
+{
+ int ret;
+
+ ret = __do_read(ff, addr, sizeof(*addr));
+ if (ret)
+ return ret;
+
+ if (ff->ph->needs_swap)
+ *addr = bswap_32(*addr);
+ return 0;
+}
+
+static int do_read_u64(struct feat_fd *ff, u64 *addr)
+{
+ int ret;
+
+ ret = __do_read(ff, addr, sizeof(*addr));
+ if (ret)
+ return ret;
+
+ if (ff->ph->needs_swap)
+ *addr = bswap_64(*addr);
+ return 0;
+}
+
+static char *do_read_string(struct feat_fd *ff)
+{
+ u32 len;
+ char *buf;
+
+ if (do_read_u32(ff, &len))
+ return NULL;
+
+ buf = malloc(len);
+ if (!buf)
+ return NULL;
+
+ if (!__do_read(ff, buf, len)) {
+ /*
+ * strings are padded by zeroes
+ * thus the actual strlen of buf
+ * may be less than len
+ */
+ return buf;
+ }
+
+ free(buf);
+ return NULL;
+}
+
+/* Return: 0 if succeded, -ERR if failed. */
+static int do_read_bitmap(struct feat_fd *ff, unsigned long **pset, u64 *psize)
+{
+ unsigned long *set;
+ u64 size, *p;
+ int i, ret;
+
+ ret = do_read_u64(ff, &size);
+ if (ret)
+ return ret;
+
+ set = bitmap_alloc(size);
+ if (!set)
+ return -ENOMEM;
+
+ p = (u64 *) set;
+
+ for (i = 0; (u64) i < BITS_TO_U64(size); i++) {
+ ret = do_read_u64(ff, p + i);
+ if (ret < 0) {
+ free(set);
+ return ret;
+ }
+ }
+
+ *pset = set;
+ *psize = size;
+ return 0;
+}
+
+static int write_tracing_data(struct feat_fd *ff,
+ struct evlist *evlist)
+{
+ if (WARN(ff->buf, "Error: calling %s in pipe-mode.\n", __func__))
+ return -1;
+
+ return read_tracing_data(ff->fd, &evlist->core.entries);
+}
+
+static int write_build_id(struct feat_fd *ff,
+ struct evlist *evlist __maybe_unused)
+{
+ struct perf_session *session;
+ int err;
+
+ session = container_of(ff->ph, struct perf_session, header);
+
+ if (!perf_session__read_build_ids(session, true))
+ return -1;
+
+ if (WARN(ff->buf, "Error: calling %s in pipe-mode.\n", __func__))
+ return -1;
+
+ err = perf_session__write_buildid_table(session, ff);
+ if (err < 0) {
+ pr_debug("failed to write buildid table\n");
+ return err;
+ }
+ perf_session__cache_build_ids(session);
+
+ return 0;
+}
+
+static int write_hostname(struct feat_fd *ff,
+ struct evlist *evlist __maybe_unused)
+{
+ struct utsname uts;
+ int ret;
+
+ ret = uname(&uts);
+ if (ret < 0)
+ return -1;
+
+ return do_write_string(ff, uts.nodename);
+}
+
+static int write_osrelease(struct feat_fd *ff,
+ struct evlist *evlist __maybe_unused)
+{
+ struct utsname uts;
+ int ret;
+
+ ret = uname(&uts);
+ if (ret < 0)
+ return -1;
+
+ return do_write_string(ff, uts.release);
+}
+
+static int write_arch(struct feat_fd *ff,
+ struct evlist *evlist __maybe_unused)
+{
+ struct utsname uts;
+ int ret;
+
+ ret = uname(&uts);
+ if (ret < 0)
+ return -1;
+
+ return do_write_string(ff, uts.machine);
+}
+
+static int write_version(struct feat_fd *ff,
+ struct evlist *evlist __maybe_unused)
+{
+ return do_write_string(ff, perf_version_string);
+}
+
+static int __write_cpudesc(struct feat_fd *ff, const char *cpuinfo_proc)
+{
+ FILE *file;
+ char *buf = NULL;
+ char *s, *p;
+ const char *search = cpuinfo_proc;
+ size_t len = 0;
+ int ret = -1;
+
+ if (!search)
+ return -1;
+
+ file = fopen("/proc/cpuinfo", "r");
+ if (!file)
+ return -1;
+
+ while (getline(&buf, &len, file) > 0) {
+ ret = strncmp(buf, search, strlen(search));
+ if (!ret)
+ break;
+ }
+
+ if (ret) {
+ ret = -1;
+ goto done;
+ }
+
+ s = buf;
+
+ p = strchr(buf, ':');
+ if (p && *(p+1) == ' ' && *(p+2))
+ s = p + 2;
+ p = strchr(s, '\n');
+ if (p)
+ *p = '\0';
+
+ /* squash extra space characters (branding string) */
+ p = s;
+ while (*p) {
+ if (isspace(*p)) {
+ char *r = p + 1;
+ char *q = skip_spaces(r);
+ *p = ' ';
+ if (q != (p+1))
+ while ((*r++ = *q++));
+ }
+ p++;
+ }
+ ret = do_write_string(ff, s);
+done:
+ free(buf);
+ fclose(file);
+ return ret;
+}
+
+static int write_cpudesc(struct feat_fd *ff,
+ struct evlist *evlist __maybe_unused)
+{
+#if defined(__powerpc__) || defined(__hppa__) || defined(__sparc__)
+#define CPUINFO_PROC { "cpu", }
+#elif defined(__s390__)
+#define CPUINFO_PROC { "vendor_id", }
+#elif defined(__sh__)
+#define CPUINFO_PROC { "cpu type", }
+#elif defined(__alpha__) || defined(__mips__)
+#define CPUINFO_PROC { "cpu model", }
+#elif defined(__arm__)
+#define CPUINFO_PROC { "model name", "Processor", }
+#elif defined(__arc__)
+#define CPUINFO_PROC { "Processor", }
+#elif defined(__xtensa__)
+#define CPUINFO_PROC { "core ID", }
+#else
+#define CPUINFO_PROC { "model name", }
+#endif
+ const char *cpuinfo_procs[] = CPUINFO_PROC;
+#undef CPUINFO_PROC
+ unsigned int i;
+
+ for (i = 0; i < ARRAY_SIZE(cpuinfo_procs); i++) {
+ int ret;
+ ret = __write_cpudesc(ff, cpuinfo_procs[i]);
+ if (ret >= 0)
+ return ret;
+ }
+ return -1;
+}
+
+
+static int write_nrcpus(struct feat_fd *ff,
+ struct evlist *evlist __maybe_unused)
+{
+ long nr;
+ u32 nrc, nra;
+ int ret;
+
+ nrc = cpu__max_present_cpu();
+
+ nr = sysconf(_SC_NPROCESSORS_ONLN);
+ if (nr < 0)
+ return -1;
+
+ nra = (u32)(nr & UINT_MAX);
+
+ ret = do_write(ff, &nrc, sizeof(nrc));
+ if (ret < 0)
+ return ret;
+
+ return do_write(ff, &nra, sizeof(nra));
+}
+
+static int write_event_desc(struct feat_fd *ff,
+ struct evlist *evlist)
+{
+ struct evsel *evsel;
+ u32 nre, nri, sz;
+ int ret;
+
+ nre = evlist->core.nr_entries;
+
+ /*
+ * write number of events
+ */
+ ret = do_write(ff, &nre, sizeof(nre));
+ if (ret < 0)
+ return ret;
+
+ /*
+ * size of perf_event_attr struct
+ */
+ sz = (u32)sizeof(evsel->core.attr);
+ ret = do_write(ff, &sz, sizeof(sz));
+ if (ret < 0)
+ return ret;
+
+ evlist__for_each_entry(evlist, evsel) {
+ ret = do_write(ff, &evsel->core.attr, sz);
+ if (ret < 0)
+ return ret;
+ /*
+ * write number of unique id per event
+ * there is one id per instance of an event
+ *
+ * copy into an nri to be independent of the
+ * type of ids,
+ */
+ nri = evsel->core.ids;
+ ret = do_write(ff, &nri, sizeof(nri));
+ if (ret < 0)
+ return ret;
+
+ /*
+ * write event string as passed on cmdline
+ */
+ ret = do_write_string(ff, evsel__name(evsel));
+ if (ret < 0)
+ return ret;
+ /*
+ * write unique ids for this event
+ */
+ ret = do_write(ff, evsel->core.id, evsel->core.ids * sizeof(u64));
+ if (ret < 0)
+ return ret;
+ }
+ return 0;
+}
+
+static int write_cmdline(struct feat_fd *ff,
+ struct evlist *evlist __maybe_unused)
+{
+ char pbuf[MAXPATHLEN], *buf;
+ int i, ret, n;
+
+ /* actual path to perf binary */
+ buf = perf_exe(pbuf, MAXPATHLEN);
+
+ /* account for binary path */
+ n = perf_env.nr_cmdline + 1;
+
+ ret = do_write(ff, &n, sizeof(n));
+ if (ret < 0)
+ return ret;
+
+ ret = do_write_string(ff, buf);
+ if (ret < 0)
+ return ret;
+
+ for (i = 0 ; i < perf_env.nr_cmdline; i++) {
+ ret = do_write_string(ff, perf_env.cmdline_argv[i]);
+ if (ret < 0)
+ return ret;
+ }
+ return 0;
+}
+
+
+static int write_cpu_topology(struct feat_fd *ff,
+ struct evlist *evlist __maybe_unused)
+{
+ struct cpu_topology *tp;
+ u32 i;
+ int ret, j;
+
+ tp = cpu_topology__new();
+ if (!tp)
+ return -1;
+
+ ret = do_write(ff, &tp->core_sib, sizeof(tp->core_sib));
+ if (ret < 0)
+ goto done;
+
+ for (i = 0; i < tp->core_sib; i++) {
+ ret = do_write_string(ff, tp->core_siblings[i]);
+ if (ret < 0)
+ goto done;
+ }
+ ret = do_write(ff, &tp->thread_sib, sizeof(tp->thread_sib));
+ if (ret < 0)
+ goto done;
+
+ for (i = 0; i < tp->thread_sib; i++) {
+ ret = do_write_string(ff, tp->thread_siblings[i]);
+ if (ret < 0)
+ break;
+ }
+
+ ret = perf_env__read_cpu_topology_map(&perf_env);
+ if (ret < 0)
+ goto done;
+
+ for (j = 0; j < perf_env.nr_cpus_avail; j++) {
+ ret = do_write(ff, &perf_env.cpu[j].core_id,
+ sizeof(perf_env.cpu[j].core_id));
+ if (ret < 0)
+ return ret;
+ ret = do_write(ff, &perf_env.cpu[j].socket_id,
+ sizeof(perf_env.cpu[j].socket_id));
+ if (ret < 0)
+ return ret;
+ }
+
+ if (!tp->die_sib)
+ goto done;
+
+ ret = do_write(ff, &tp->die_sib, sizeof(tp->die_sib));
+ if (ret < 0)
+ goto done;
+
+ for (i = 0; i < tp->die_sib; i++) {
+ ret = do_write_string(ff, tp->die_siblings[i]);
+ if (ret < 0)
+ goto done;
+ }
+
+ for (j = 0; j < perf_env.nr_cpus_avail; j++) {
+ ret = do_write(ff, &perf_env.cpu[j].die_id,
+ sizeof(perf_env.cpu[j].die_id));
+ if (ret < 0)
+ return ret;
+ }
+
+done:
+ cpu_topology__delete(tp);
+ return ret;
+}
+
+
+
+static int write_total_mem(struct feat_fd *ff,
+ struct evlist *evlist __maybe_unused)
+{
+ char *buf = NULL;
+ FILE *fp;
+ size_t len = 0;
+ int ret = -1, n;
+ uint64_t mem;
+
+ fp = fopen("/proc/meminfo", "r");
+ if (!fp)
+ return -1;
+
+ while (getline(&buf, &len, fp) > 0) {
+ ret = strncmp(buf, "MemTotal:", 9);
+ if (!ret)
+ break;
+ }
+ if (!ret) {
+ n = sscanf(buf, "%*s %"PRIu64, &mem);
+ if (n == 1)
+ ret = do_write(ff, &mem, sizeof(mem));
+ } else
+ ret = -1;
+ free(buf);
+ fclose(fp);
+ return ret;
+}
+
+static int write_numa_topology(struct feat_fd *ff,
+ struct evlist *evlist __maybe_unused)
+{
+ struct numa_topology *tp;
+ int ret = -1;
+ u32 i;
+
+ tp = numa_topology__new();
+ if (!tp)
+ return -ENOMEM;
+
+ ret = do_write(ff, &tp->nr, sizeof(u32));
+ if (ret < 0)
+ goto err;
+
+ for (i = 0; i < tp->nr; i++) {
+ struct numa_topology_node *n = &tp->nodes[i];
+
+ ret = do_write(ff, &n->node, sizeof(u32));
+ if (ret < 0)
+ goto err;
+
+ ret = do_write(ff, &n->mem_total, sizeof(u64));
+ if (ret)
+ goto err;
+
+ ret = do_write(ff, &n->mem_free, sizeof(u64));
+ if (ret)
+ goto err;
+
+ ret = do_write_string(ff, n->cpus);
+ if (ret < 0)
+ goto err;
+ }
+
+ ret = 0;
+
+err:
+ numa_topology__delete(tp);
+ return ret;
+}
+
+/*
+ * File format:
+ *
+ * struct pmu_mappings {
+ * u32 pmu_num;
+ * struct pmu_map {
+ * u32 type;
+ * char name[];
+ * }[pmu_num];
+ * };
+ */
+
+static int write_pmu_mappings(struct feat_fd *ff,
+ struct evlist *evlist __maybe_unused)
+{
+ struct perf_pmu *pmu = NULL;
+ u32 pmu_num = 0;
+ int ret;
+
+ /*
+ * Do a first pass to count number of pmu to avoid lseek so this
+ * works in pipe mode as well.
+ */
+ while ((pmu = perf_pmu__scan(pmu))) {
+ if (!pmu->name)
+ continue;
+ pmu_num++;
+ }
+
+ ret = do_write(ff, &pmu_num, sizeof(pmu_num));
+ if (ret < 0)
+ return ret;
+
+ while ((pmu = perf_pmu__scan(pmu))) {
+ if (!pmu->name)
+ continue;
+
+ ret = do_write(ff, &pmu->type, sizeof(pmu->type));
+ if (ret < 0)
+ return ret;
+
+ ret = do_write_string(ff, pmu->name);
+ if (ret < 0)
+ return ret;
+ }
+
+ return 0;
+}
+
+/*
+ * File format:
+ *
+ * struct group_descs {
+ * u32 nr_groups;
+ * struct group_desc {
+ * char name[];
+ * u32 leader_idx;
+ * u32 nr_members;
+ * }[nr_groups];
+ * };
+ */
+static int write_group_desc(struct feat_fd *ff,
+ struct evlist *evlist)
+{
+ u32 nr_groups = evlist->nr_groups;
+ struct evsel *evsel;
+ int ret;
+
+ ret = do_write(ff, &nr_groups, sizeof(nr_groups));
+ if (ret < 0)
+ return ret;
+
+ evlist__for_each_entry(evlist, evsel) {
+ if (evsel__is_group_leader(evsel) && evsel->core.nr_members > 1) {
+ const char *name = evsel->group_name ?: "{anon_group}";
+ u32 leader_idx = evsel->idx;
+ u32 nr_members = evsel->core.nr_members;
+
+ ret = do_write_string(ff, name);
+ if (ret < 0)
+ return ret;
+
+ ret = do_write(ff, &leader_idx, sizeof(leader_idx));
+ if (ret < 0)
+ return ret;
+
+ ret = do_write(ff, &nr_members, sizeof(nr_members));
+ if (ret < 0)
+ return ret;
+ }
+ }
+ return 0;
+}
+
+/*
+ * Return the CPU id as a raw string.
+ *
+ * Each architecture should provide a more precise id string that
+ * can be use to match the architecture's "mapfile".
+ */
+char * __weak get_cpuid_str(struct perf_pmu *pmu __maybe_unused)
+{
+ return NULL;
+}
+
+/* Return zero when the cpuid from the mapfile.csv matches the
+ * cpuid string generated on this platform.
+ * Otherwise return non-zero.
+ */
+int __weak strcmp_cpuid_str(const char *mapcpuid, const char *cpuid)
+{
+ regex_t re;
+ regmatch_t pmatch[1];
+ int match;
+
+ if (regcomp(&re, mapcpuid, REG_EXTENDED) != 0) {
+ /* Warn unable to generate match particular string. */
+ pr_info("Invalid regular expression %s\n", mapcpuid);
+ return 1;
+ }
+
+ match = !regexec(&re, cpuid, 1, pmatch, 0);
+ regfree(&re);
+ if (match) {
+ size_t match_len = (pmatch[0].rm_eo - pmatch[0].rm_so);
+
+ /* Verify the entire string matched. */
+ if (match_len == strlen(cpuid))
+ return 0;
+ }
+ return 1;
+}
+
+/*
+ * default get_cpuid(): nothing gets recorded
+ * actual implementation must be in arch/$(SRCARCH)/util/header.c
+ */
+int __weak get_cpuid(char *buffer __maybe_unused, size_t sz __maybe_unused)
+{
+ return ENOSYS; /* Not implemented */
+}
+
+static int write_cpuid(struct feat_fd *ff,
+ struct evlist *evlist __maybe_unused)
+{
+ char buffer[64];
+ int ret;
+
+ ret = get_cpuid(buffer, sizeof(buffer));
+ if (ret)
+ return -1;
+
+ return do_write_string(ff, buffer);
+}
+
+static int write_branch_stack(struct feat_fd *ff __maybe_unused,
+ struct evlist *evlist __maybe_unused)
+{
+ return 0;
+}
+
+static int write_auxtrace(struct feat_fd *ff,
+ struct evlist *evlist __maybe_unused)
+{
+ struct perf_session *session;
+ int err;
+
+ if (WARN(ff->buf, "Error: calling %s in pipe-mode.\n", __func__))
+ return -1;
+
+ session = container_of(ff->ph, struct perf_session, header);
+
+ err = auxtrace_index__write(ff->fd, &session->auxtrace_index);
+ if (err < 0)
+ pr_err("Failed to write auxtrace index\n");
+ return err;
+}
+
+static int write_clockid(struct feat_fd *ff,
+ struct evlist *evlist __maybe_unused)
+{
+ return do_write(ff, &ff->ph->env.clock.clockid_res_ns,
+ sizeof(ff->ph->env.clock.clockid_res_ns));
+}
+
+static int write_clock_data(struct feat_fd *ff,
+ struct evlist *evlist __maybe_unused)
+{
+ u64 *data64;
+ u32 data32;
+ int ret;
+
+ /* version */
+ data32 = 1;
+
+ ret = do_write(ff, &data32, sizeof(data32));
+ if (ret < 0)
+ return ret;
+
+ /* clockid */
+ data32 = ff->ph->env.clock.clockid;
+
+ ret = do_write(ff, &data32, sizeof(data32));
+ if (ret < 0)
+ return ret;
+
+ /* TOD ref time */
+ data64 = &ff->ph->env.clock.tod_ns;
+
+ ret = do_write(ff, data64, sizeof(*data64));
+ if (ret < 0)
+ return ret;
+
+ /* clockid ref time */
+ data64 = &ff->ph->env.clock.clockid_ns;
+
+ return do_write(ff, data64, sizeof(*data64));
+}
+
+static int write_dir_format(struct feat_fd *ff,
+ struct evlist *evlist __maybe_unused)
+{
+ struct perf_session *session;
+ struct perf_data *data;
+
+ session = container_of(ff->ph, struct perf_session, header);
+ data = session->data;
+
+ if (WARN_ON(!perf_data__is_dir(data)))
+ return -1;
+
+ return do_write(ff, &data->dir.version, sizeof(data->dir.version));
+}
+
+#ifdef HAVE_LIBBPF_SUPPORT
+static int write_bpf_prog_info(struct feat_fd *ff,
+ struct evlist *evlist __maybe_unused)
+{
+ struct perf_env *env = &ff->ph->env;
+ struct rb_root *root;
+ struct rb_node *next;
+ int ret;
+
+ down_read(&env->bpf_progs.lock);
+
+ ret = do_write(ff, &env->bpf_progs.infos_cnt,
+ sizeof(env->bpf_progs.infos_cnt));
+ if (ret < 0)
+ goto out;
+
+ root = &env->bpf_progs.infos;
+ next = rb_first(root);
+ while (next) {
+ struct bpf_prog_info_node *node;
+ size_t len;
+
+ node = rb_entry(next, struct bpf_prog_info_node, rb_node);
+ next = rb_next(&node->rb_node);
+ len = sizeof(struct bpf_prog_info_linear) +
+ node->info_linear->data_len;
+
+ /* before writing to file, translate address to offset */
+ bpf_program__bpil_addr_to_offs(node->info_linear);
+ ret = do_write(ff, node->info_linear, len);
+ /*
+ * translate back to address even when do_write() fails,
+ * so that this function never changes the data.
+ */
+ bpf_program__bpil_offs_to_addr(node->info_linear);
+ if (ret < 0)
+ goto out;
+ }
+out:
+ up_read(&env->bpf_progs.lock);
+ return ret;
+}
+#else // HAVE_LIBBPF_SUPPORT
+static int write_bpf_prog_info(struct feat_fd *ff __maybe_unused,
+ struct evlist *evlist __maybe_unused)
+{
+ return 0;
+}
+#endif // HAVE_LIBBPF_SUPPORT
+
+static int write_bpf_btf(struct feat_fd *ff,
+ struct evlist *evlist __maybe_unused)
+{
+ struct perf_env *env = &ff->ph->env;
+ struct rb_root *root;
+ struct rb_node *next;
+ int ret;
+
+ down_read(&env->bpf_progs.lock);
+
+ ret = do_write(ff, &env->bpf_progs.btfs_cnt,
+ sizeof(env->bpf_progs.btfs_cnt));
+
+ if (ret < 0)
+ goto out;
+
+ root = &env->bpf_progs.btfs;
+ next = rb_first(root);
+ while (next) {
+ struct btf_node *node;
+
+ node = rb_entry(next, struct btf_node, rb_node);
+ next = rb_next(&node->rb_node);
+ ret = do_write(ff, &node->id,
+ sizeof(u32) * 2 + node->data_size);
+ if (ret < 0)
+ goto out;
+ }
+out:
+ up_read(&env->bpf_progs.lock);
+ return ret;
+}
+
+static int cpu_cache_level__sort(const void *a, const void *b)
+{
+ struct cpu_cache_level *cache_a = (struct cpu_cache_level *)a;
+ struct cpu_cache_level *cache_b = (struct cpu_cache_level *)b;
+
+ return cache_a->level - cache_b->level;
+}
+
+static bool cpu_cache_level__cmp(struct cpu_cache_level *a, struct cpu_cache_level *b)
+{
+ if (a->level != b->level)
+ return false;
+
+ if (a->line_size != b->line_size)
+ return false;
+
+ if (a->sets != b->sets)
+ return false;
+
+ if (a->ways != b->ways)
+ return false;
+
+ if (strcmp(a->type, b->type))
+ return false;
+
+ if (strcmp(a->size, b->size))
+ return false;
+
+ if (strcmp(a->map, b->map))
+ return false;
+
+ return true;
+}
+
+static int cpu_cache_level__read(struct cpu_cache_level *cache, u32 cpu, u16 level)
+{
+ char path[PATH_MAX], file[PATH_MAX];
+ struct stat st;
+ size_t len;
+
+ scnprintf(path, PATH_MAX, "devices/system/cpu/cpu%d/cache/index%d/", cpu, level);
+ scnprintf(file, PATH_MAX, "%s/%s", sysfs__mountpoint(), path);
+
+ if (stat(file, &st))
+ return 1;
+
+ scnprintf(file, PATH_MAX, "%s/level", path);
+ if (sysfs__read_int(file, (int *) &cache->level))
+ return -1;
+
+ scnprintf(file, PATH_MAX, "%s/coherency_line_size", path);
+ if (sysfs__read_int(file, (int *) &cache->line_size))
+ return -1;
+
+ scnprintf(file, PATH_MAX, "%s/number_of_sets", path);
+ if (sysfs__read_int(file, (int *) &cache->sets))
+ return -1;
+
+ scnprintf(file, PATH_MAX, "%s/ways_of_associativity", path);
+ if (sysfs__read_int(file, (int *) &cache->ways))
+ return -1;
+
+ scnprintf(file, PATH_MAX, "%s/type", path);
+ if (sysfs__read_str(file, &cache->type, &len))
+ return -1;
+
+ cache->type[len] = 0;
+ cache->type = strim(cache->type);
+
+ scnprintf(file, PATH_MAX, "%s/size", path);
+ if (sysfs__read_str(file, &cache->size, &len)) {
+ zfree(&cache->type);
+ return -1;
+ }
+
+ cache->size[len] = 0;
+ cache->size = strim(cache->size);
+
+ scnprintf(file, PATH_MAX, "%s/shared_cpu_list", path);
+ if (sysfs__read_str(file, &cache->map, &len)) {
+ zfree(&cache->size);
+ zfree(&cache->type);
+ return -1;
+ }
+
+ cache->map[len] = 0;
+ cache->map = strim(cache->map);
+ return 0;
+}
+
+static void cpu_cache_level__fprintf(FILE *out, struct cpu_cache_level *c)
+{
+ fprintf(out, "L%d %-15s %8s [%s]\n", c->level, c->type, c->size, c->map);
+}
+
+#define MAX_CACHE_LVL 4
+
+static int build_caches(struct cpu_cache_level caches[], u32 *cntp)
+{
+ u32 i, cnt = 0;
+ u32 nr, cpu;
+ u16 level;
+
+ nr = cpu__max_cpu();
+
+ for (cpu = 0; cpu < nr; cpu++) {
+ for (level = 0; level < MAX_CACHE_LVL; level++) {
+ struct cpu_cache_level c;
+ int err;
+
+ err = cpu_cache_level__read(&c, cpu, level);
+ if (err < 0)
+ return err;
+
+ if (err == 1)
+ break;
+
+ for (i = 0; i < cnt; i++) {
+ if (cpu_cache_level__cmp(&c, &caches[i]))
+ break;
+ }
+
+ if (i == cnt)
+ caches[cnt++] = c;
+ else
+ cpu_cache_level__free(&c);
+ }
+ }
+ *cntp = cnt;
+ return 0;
+}
+
+static int write_cache(struct feat_fd *ff,
+ struct evlist *evlist __maybe_unused)
+{
+ u32 max_caches = cpu__max_cpu() * MAX_CACHE_LVL;
+ struct cpu_cache_level caches[max_caches];
+ u32 cnt = 0, i, version = 1;
+ int ret;
+
+ ret = build_caches(caches, &cnt);
+ if (ret)
+ goto out;
+
+ qsort(&caches, cnt, sizeof(struct cpu_cache_level), cpu_cache_level__sort);
+
+ ret = do_write(ff, &version, sizeof(u32));
+ if (ret < 0)
+ goto out;
+
+ ret = do_write(ff, &cnt, sizeof(u32));
+ if (ret < 0)
+ goto out;
+
+ for (i = 0; i < cnt; i++) {
+ struct cpu_cache_level *c = &caches[i];
+
+ #define _W(v) \
+ ret = do_write(ff, &c->v, sizeof(u32)); \
+ if (ret < 0) \
+ goto out;
+
+ _W(level)
+ _W(line_size)
+ _W(sets)
+ _W(ways)
+ #undef _W
+
+ #define _W(v) \
+ ret = do_write_string(ff, (const char *) c->v); \
+ if (ret < 0) \
+ goto out;
+
+ _W(type)
+ _W(size)
+ _W(map)
+ #undef _W
+ }
+
+out:
+ for (i = 0; i < cnt; i++)
+ cpu_cache_level__free(&caches[i]);
+ return ret;
+}
+
+static int write_stat(struct feat_fd *ff __maybe_unused,
+ struct evlist *evlist __maybe_unused)
+{
+ return 0;
+}
+
+static int write_sample_time(struct feat_fd *ff,
+ struct evlist *evlist)
+{
+ int ret;
+
+ ret = do_write(ff, &evlist->first_sample_time,
+ sizeof(evlist->first_sample_time));
+ if (ret < 0)
+ return ret;
+
+ return do_write(ff, &evlist->last_sample_time,
+ sizeof(evlist->last_sample_time));
+}
+
+
+static int memory_node__read(struct memory_node *n, unsigned long idx)
+{
+ unsigned int phys, size = 0;
+ char path[PATH_MAX];
+ struct dirent *ent;
+ DIR *dir;
+
+#define for_each_memory(mem, dir) \
+ while ((ent = readdir(dir))) \
+ if (strcmp(ent->d_name, ".") && \
+ strcmp(ent->d_name, "..") && \
+ sscanf(ent->d_name, "memory%u", &mem) == 1)
+
+ scnprintf(path, PATH_MAX,
+ "%s/devices/system/node/node%lu",
+ sysfs__mountpoint(), idx);
+
+ dir = opendir(path);
+ if (!dir) {
+ pr_warning("failed: cant' open memory sysfs data\n");
+ return -1;
+ }
+
+ for_each_memory(phys, dir) {
+ size = max(phys, size);
+ }
+
+ size++;
+
+ n->set = bitmap_alloc(size);
+ if (!n->set) {
+ closedir(dir);
+ return -ENOMEM;
+ }
+
+ n->node = idx;
+ n->size = size;
+
+ rewinddir(dir);
+
+ for_each_memory(phys, dir) {
+ set_bit(phys, n->set);
+ }
+
+ closedir(dir);
+ return 0;
+}
+
+static int memory_node__sort(const void *a, const void *b)
+{
+ const struct memory_node *na = a;
+ const struct memory_node *nb = b;
+
+ return na->node - nb->node;
+}
+
+static int build_mem_topology(struct memory_node *nodes, u64 size, u64 *cntp)
+{
+ char path[PATH_MAX];
+ struct dirent *ent;
+ DIR *dir;
+ u64 cnt = 0;
+ int ret = 0;
+
+ scnprintf(path, PATH_MAX, "%s/devices/system/node/",
+ sysfs__mountpoint());
+
+ dir = opendir(path);
+ if (!dir) {
+ pr_debug2("%s: could't read %s, does this arch have topology information?\n",
+ __func__, path);
+ return -1;
+ }
+
+ while (!ret && (ent = readdir(dir))) {
+ unsigned int idx;
+ int r;
+
+ if (!strcmp(ent->d_name, ".") ||
+ !strcmp(ent->d_name, ".."))
+ continue;
+
+ r = sscanf(ent->d_name, "node%u", &idx);
+ if (r != 1)
+ continue;
+
+ if (WARN_ONCE(cnt >= size,
+ "failed to write MEM_TOPOLOGY, way too many nodes\n")) {
+ closedir(dir);
+ return -1;
+ }
+
+ ret = memory_node__read(&nodes[cnt++], idx);
+ }
+
+ *cntp = cnt;
+ closedir(dir);
+
+ if (!ret)
+ qsort(nodes, cnt, sizeof(nodes[0]), memory_node__sort);
+
+ return ret;
+}
+
+#define MAX_MEMORY_NODES 2000
+
+/*
+ * The MEM_TOPOLOGY holds physical memory map for every
+ * node in system. The format of data is as follows:
+ *
+ * 0 - version | for future changes
+ * 8 - block_size_bytes | /sys/devices/system/memory/block_size_bytes
+ * 16 - count | number of nodes
+ *
+ * For each node we store map of physical indexes for
+ * each node:
+ *
+ * 32 - node id | node index
+ * 40 - size | size of bitmap
+ * 48 - bitmap | bitmap of memory indexes that belongs to node
+ */
+static int write_mem_topology(struct feat_fd *ff __maybe_unused,
+ struct evlist *evlist __maybe_unused)
+{
+ static struct memory_node nodes[MAX_MEMORY_NODES];
+ u64 bsize, version = 1, i, nr;
+ int ret;
+
+ ret = sysfs__read_xll("devices/system/memory/block_size_bytes",
+ (unsigned long long *) &bsize);
+ if (ret)
+ return ret;
+
+ ret = build_mem_topology(&nodes[0], MAX_MEMORY_NODES, &nr);
+ if (ret)
+ return ret;
+
+ ret = do_write(ff, &version, sizeof(version));
+ if (ret < 0)
+ goto out;
+
+ ret = do_write(ff, &bsize, sizeof(bsize));
+ if (ret < 0)
+ goto out;
+
+ ret = do_write(ff, &nr, sizeof(nr));
+ if (ret < 0)
+ goto out;
+
+ for (i = 0; i < nr; i++) {
+ struct memory_node *n = &nodes[i];
+
+ #define _W(v) \
+ ret = do_write(ff, &n->v, sizeof(n->v)); \
+ if (ret < 0) \
+ goto out;
+
+ _W(node)
+ _W(size)
+
+ #undef _W
+
+ ret = do_write_bitmap(ff, n->set, n->size);
+ if (ret < 0)
+ goto out;
+ }
+
+out:
+ return ret;
+}
+
+static int write_compressed(struct feat_fd *ff __maybe_unused,
+ struct evlist *evlist __maybe_unused)
+{
+ int ret;
+
+ ret = do_write(ff, &(ff->ph->env.comp_ver), sizeof(ff->ph->env.comp_ver));
+ if (ret)
+ return ret;
+
+ ret = do_write(ff, &(ff->ph->env.comp_type), sizeof(ff->ph->env.comp_type));
+ if (ret)
+ return ret;
+
+ ret = do_write(ff, &(ff->ph->env.comp_level), sizeof(ff->ph->env.comp_level));
+ if (ret)
+ return ret;
+
+ ret = do_write(ff, &(ff->ph->env.comp_ratio), sizeof(ff->ph->env.comp_ratio));
+ if (ret)
+ return ret;
+
+ return do_write(ff, &(ff->ph->env.comp_mmap_len), sizeof(ff->ph->env.comp_mmap_len));
+}
+
+static int write_cpu_pmu_caps(struct feat_fd *ff,
+ struct evlist *evlist __maybe_unused)
+{
+ struct perf_pmu *cpu_pmu = perf_pmu__find("cpu");
+ struct perf_pmu_caps *caps = NULL;
+ int nr_caps;
+ int ret;
+
+ if (!cpu_pmu)
+ return -ENOENT;
+
+ nr_caps = perf_pmu__caps_parse(cpu_pmu);
+ if (nr_caps < 0)
+ return nr_caps;
+
+ ret = do_write(ff, &nr_caps, sizeof(nr_caps));
+ if (ret < 0)
+ return ret;
+
+ list_for_each_entry(caps, &cpu_pmu->caps, list) {
+ ret = do_write_string(ff, caps->name);
+ if (ret < 0)
+ return ret;
+
+ ret = do_write_string(ff, caps->value);
+ if (ret < 0)
+ return ret;
+ }
+
+ return ret;
+}
+
+static void print_hostname(struct feat_fd *ff, FILE *fp)
+{
+ fprintf(fp, "# hostname : %s\n", ff->ph->env.hostname);
+}
+
+static void print_osrelease(struct feat_fd *ff, FILE *fp)
+{
+ fprintf(fp, "# os release : %s\n", ff->ph->env.os_release);
+}
+
+static void print_arch(struct feat_fd *ff, FILE *fp)
+{
+ fprintf(fp, "# arch : %s\n", ff->ph->env.arch);
+}
+
+static void print_cpudesc(struct feat_fd *ff, FILE *fp)
+{
+ fprintf(fp, "# cpudesc : %s\n", ff->ph->env.cpu_desc);
+}
+
+static void print_nrcpus(struct feat_fd *ff, FILE *fp)
+{
+ fprintf(fp, "# nrcpus online : %u\n", ff->ph->env.nr_cpus_online);
+ fprintf(fp, "# nrcpus avail : %u\n", ff->ph->env.nr_cpus_avail);
+}
+
+static void print_version(struct feat_fd *ff, FILE *fp)
+{
+ fprintf(fp, "# perf version : %s\n", ff->ph->env.version);
+}
+
+static void print_cmdline(struct feat_fd *ff, FILE *fp)
+{
+ int nr, i;
+
+ nr = ff->ph->env.nr_cmdline;
+
+ fprintf(fp, "# cmdline : ");
+
+ for (i = 0; i < nr; i++) {
+ char *argv_i = strdup(ff->ph->env.cmdline_argv[i]);
+ if (!argv_i) {
+ fprintf(fp, "%s ", ff->ph->env.cmdline_argv[i]);
+ } else {
+ char *mem = argv_i;
+ do {
+ char *quote = strchr(argv_i, '\'');
+ if (!quote)
+ break;
+ *quote++ = '\0';
+ fprintf(fp, "%s\\\'", argv_i);
+ argv_i = quote;
+ } while (1);
+ fprintf(fp, "%s ", argv_i);
+ free(mem);
+ }
+ }
+ fputc('\n', fp);
+}
+
+static void print_cpu_topology(struct feat_fd *ff, FILE *fp)
+{
+ struct perf_header *ph = ff->ph;
+ int cpu_nr = ph->env.nr_cpus_avail;
+ int nr, i;
+ char *str;
+
+ nr = ph->env.nr_sibling_cores;
+ str = ph->env.sibling_cores;
+
+ for (i = 0; i < nr; i++) {
+ fprintf(fp, "# sibling sockets : %s\n", str);
+ str += strlen(str) + 1;
+ }
+
+ if (ph->env.nr_sibling_dies) {
+ nr = ph->env.nr_sibling_dies;
+ str = ph->env.sibling_dies;
+
+ for (i = 0; i < nr; i++) {
+ fprintf(fp, "# sibling dies : %s\n", str);
+ str += strlen(str) + 1;
+ }
+ }
+
+ nr = ph->env.nr_sibling_threads;
+ str = ph->env.sibling_threads;
+
+ for (i = 0; i < nr; i++) {
+ fprintf(fp, "# sibling threads : %s\n", str);
+ str += strlen(str) + 1;
+ }
+
+ if (ph->env.nr_sibling_dies) {
+ if (ph->env.cpu != NULL) {
+ for (i = 0; i < cpu_nr; i++)
+ fprintf(fp, "# CPU %d: Core ID %d, "
+ "Die ID %d, Socket ID %d\n",
+ i, ph->env.cpu[i].core_id,
+ ph->env.cpu[i].die_id,
+ ph->env.cpu[i].socket_id);
+ } else
+ fprintf(fp, "# Core ID, Die ID and Socket ID "
+ "information is not available\n");
+ } else {
+ if (ph->env.cpu != NULL) {
+ for (i = 0; i < cpu_nr; i++)
+ fprintf(fp, "# CPU %d: Core ID %d, "
+ "Socket ID %d\n",
+ i, ph->env.cpu[i].core_id,
+ ph->env.cpu[i].socket_id);
+ } else
+ fprintf(fp, "# Core ID and Socket ID "
+ "information is not available\n");
+ }
+}
+
+static void print_clockid(struct feat_fd *ff, FILE *fp)
+{
+ fprintf(fp, "# clockid frequency: %"PRIu64" MHz\n",
+ ff->ph->env.clock.clockid_res_ns * 1000);
+}
+
+static void print_clock_data(struct feat_fd *ff, FILE *fp)
+{
+ struct timespec clockid_ns;
+ char tstr[64], date[64];
+ struct timeval tod_ns;
+ clockid_t clockid;
+ struct tm ltime;
+ u64 ref;
+
+ if (!ff->ph->env.clock.enabled) {
+ fprintf(fp, "# reference time disabled\n");
+ return;
+ }
+
+ /* Compute TOD time. */
+ ref = ff->ph->env.clock.tod_ns;
+ tod_ns.tv_sec = ref / NSEC_PER_SEC;
+ ref -= tod_ns.tv_sec * NSEC_PER_SEC;
+ tod_ns.tv_usec = ref / NSEC_PER_USEC;
+
+ /* Compute clockid time. */
+ ref = ff->ph->env.clock.clockid_ns;
+ clockid_ns.tv_sec = ref / NSEC_PER_SEC;
+ ref -= clockid_ns.tv_sec * NSEC_PER_SEC;
+ clockid_ns.tv_nsec = ref;
+
+ clockid = ff->ph->env.clock.clockid;
+
+ if (localtime_r(&tod_ns.tv_sec, &ltime) == NULL)
+ snprintf(tstr, sizeof(tstr), "<error>");
+ else {
+ strftime(date, sizeof(date), "%F %T", &ltime);
+ scnprintf(tstr, sizeof(tstr), "%s.%06d",
+ date, (int) tod_ns.tv_usec);
+ }
+
+ fprintf(fp, "# clockid: %s (%u)\n", clockid_name(clockid), clockid);
+ fprintf(fp, "# reference time: %s = %ld.%06d (TOD) = %ld.%09ld (%s)\n",
+ tstr, tod_ns.tv_sec, (int) tod_ns.tv_usec,
+ clockid_ns.tv_sec, clockid_ns.tv_nsec,
+ clockid_name(clockid));
+}
+
+static void print_dir_format(struct feat_fd *ff, FILE *fp)
+{
+ struct perf_session *session;
+ struct perf_data *data;
+
+ session = container_of(ff->ph, struct perf_session, header);
+ data = session->data;
+
+ fprintf(fp, "# directory data version : %"PRIu64"\n", data->dir.version);
+}
+
+static void print_bpf_prog_info(struct feat_fd *ff, FILE *fp)
+{
+ struct perf_env *env = &ff->ph->env;
+ struct rb_root *root;
+ struct rb_node *next;
+
+ down_read(&env->bpf_progs.lock);
+
+ root = &env->bpf_progs.infos;
+ next = rb_first(root);
+
+ while (next) {
+ struct bpf_prog_info_node *node;
+
+ node = rb_entry(next, struct bpf_prog_info_node, rb_node);
+ next = rb_next(&node->rb_node);
+
+ __bpf_event__print_bpf_prog_info(&node->info_linear->info,
+ env, fp);
+ }
+
+ up_read(&env->bpf_progs.lock);
+}
+
+static void print_bpf_btf(struct feat_fd *ff, FILE *fp)
+{
+ struct perf_env *env = &ff->ph->env;
+ struct rb_root *root;
+ struct rb_node *next;
+
+ down_read(&env->bpf_progs.lock);
+
+ root = &env->bpf_progs.btfs;
+ next = rb_first(root);
+
+ while (next) {
+ struct btf_node *node;
+
+ node = rb_entry(next, struct btf_node, rb_node);
+ next = rb_next(&node->rb_node);
+ fprintf(fp, "# btf info of id %u\n", node->id);
+ }
+
+ up_read(&env->bpf_progs.lock);
+}
+
+static void free_event_desc(struct evsel *events)
+{
+ struct evsel *evsel;
+
+ if (!events)
+ return;
+
+ for (evsel = events; evsel->core.attr.size; evsel++) {
+ zfree(&evsel->name);
+ zfree(&evsel->core.id);
+ }
+
+ free(events);
+}
+
+static bool perf_attr_check(struct perf_event_attr *attr)
+{
+ if (attr->__reserved_1 || attr->__reserved_2 || attr->__reserved_3) {
+ pr_warning("Reserved bits are set unexpectedly. "
+ "Please update perf tool.\n");
+ return false;
+ }
+
+ if (attr->sample_type & ~(PERF_SAMPLE_MAX-1)) {
+ pr_warning("Unknown sample type (0x%llx) is detected. "
+ "Please update perf tool.\n",
+ attr->sample_type);
+ return false;
+ }
+
+ if (attr->read_format & ~(PERF_FORMAT_MAX-1)) {
+ pr_warning("Unknown read format (0x%llx) is detected. "
+ "Please update perf tool.\n",
+ attr->read_format);
+ return false;
+ }
+
+ if ((attr->sample_type & PERF_SAMPLE_BRANCH_STACK) &&
+ (attr->branch_sample_type & ~(PERF_SAMPLE_BRANCH_MAX-1))) {
+ pr_warning("Unknown branch sample type (0x%llx) is detected. "
+ "Please update perf tool.\n",
+ attr->branch_sample_type);
+
+ return false;
+ }
+
+ return true;
+}
+
+static struct evsel *read_event_desc(struct feat_fd *ff)
+{
+ struct evsel *evsel, *events = NULL;
+ u64 *id;
+ void *buf = NULL;
+ u32 nre, sz, nr, i, j;
+ size_t msz;
+
+ /* number of events */
+ if (do_read_u32(ff, &nre))
+ goto error;
+
+ if (do_read_u32(ff, &sz))
+ goto error;
+
+ /* buffer to hold on file attr struct */
+ buf = malloc(sz);
+ if (!buf)
+ goto error;
+
+ /* the last event terminates with evsel->core.attr.size == 0: */
+ events = calloc(nre + 1, sizeof(*events));
+ if (!events)
+ goto error;
+
+ msz = sizeof(evsel->core.attr);
+ if (sz < msz)
+ msz = sz;
+
+ for (i = 0, evsel = events; i < nre; evsel++, i++) {
+ evsel->idx = i;
+
+ /*
+ * must read entire on-file attr struct to
+ * sync up with layout.
+ */
+ if (__do_read(ff, buf, sz))
+ goto error;
+
+ if (ff->ph->needs_swap)
+ perf_event__attr_swap(buf);
+
+ memcpy(&evsel->core.attr, buf, msz);
+
+ if (!perf_attr_check(&evsel->core.attr))
+ goto error;
+
+ if (do_read_u32(ff, &nr))
+ goto error;
+
+ if (ff->ph->needs_swap)
+ evsel->needs_swap = true;
+
+ evsel->name = do_read_string(ff);
+ if (!evsel->name)
+ goto error;
+
+ if (!nr)
+ continue;
+
+ id = calloc(nr, sizeof(*id));
+ if (!id)
+ goto error;
+ evsel->core.ids = nr;
+ evsel->core.id = id;
+
+ for (j = 0 ; j < nr; j++) {
+ if (do_read_u64(ff, id))
+ goto error;
+ id++;
+ }
+ }
+out:
+ free(buf);
+ return events;
+error:
+ free_event_desc(events);
+ events = NULL;
+ goto out;
+}
+
+static int __desc_attr__fprintf(FILE *fp, const char *name, const char *val,
+ void *priv __maybe_unused)
+{
+ return fprintf(fp, ", %s = %s", name, val);
+}
+
+static void print_event_desc(struct feat_fd *ff, FILE *fp)
+{
+ struct evsel *evsel, *events;
+ u32 j;
+ u64 *id;
+
+ if (ff->events)
+ events = ff->events;
+ else
+ events = read_event_desc(ff);
+
+ if (!events) {
+ fprintf(fp, "# event desc: not available or unable to read\n");
+ return;
+ }
+
+ for (evsel = events; evsel->core.attr.size; evsel++) {
+ fprintf(fp, "# event : name = %s, ", evsel->name);
+
+ if (evsel->core.ids) {
+ fprintf(fp, ", id = {");
+ for (j = 0, id = evsel->core.id; j < evsel->core.ids; j++, id++) {
+ if (j)
+ fputc(',', fp);
+ fprintf(fp, " %"PRIu64, *id);
+ }
+ fprintf(fp, " }");
+ }
+
+ perf_event_attr__fprintf(fp, &evsel->core.attr, __desc_attr__fprintf, NULL);
+
+ fputc('\n', fp);
+ }
+
+ free_event_desc(events);
+ ff->events = NULL;
+}
+
+static void print_total_mem(struct feat_fd *ff, FILE *fp)
+{
+ fprintf(fp, "# total memory : %llu kB\n", ff->ph->env.total_mem);
+}
+
+static void print_numa_topology(struct feat_fd *ff, FILE *fp)
+{
+ int i;
+ struct numa_node *n;
+
+ for (i = 0; i < ff->ph->env.nr_numa_nodes; i++) {
+ n = &ff->ph->env.numa_nodes[i];
+
+ fprintf(fp, "# node%u meminfo : total = %"PRIu64" kB,"
+ " free = %"PRIu64" kB\n",
+ n->node, n->mem_total, n->mem_free);
+
+ fprintf(fp, "# node%u cpu list : ", n->node);
+ cpu_map__fprintf(n->map, fp);
+ }
+}
+
+static void print_cpuid(struct feat_fd *ff, FILE *fp)
+{
+ fprintf(fp, "# cpuid : %s\n", ff->ph->env.cpuid);
+}
+
+static void print_branch_stack(struct feat_fd *ff __maybe_unused, FILE *fp)
+{
+ fprintf(fp, "# contains samples with branch stack\n");
+}
+
+static void print_auxtrace(struct feat_fd *ff __maybe_unused, FILE *fp)
+{
+ fprintf(fp, "# contains AUX area data (e.g. instruction trace)\n");
+}
+
+static void print_stat(struct feat_fd *ff __maybe_unused, FILE *fp)
+{
+ fprintf(fp, "# contains stat data\n");
+}
+
+static void print_cache(struct feat_fd *ff, FILE *fp __maybe_unused)
+{
+ int i;
+
+ fprintf(fp, "# CPU cache info:\n");
+ for (i = 0; i < ff->ph->env.caches_cnt; i++) {
+ fprintf(fp, "# ");
+ cpu_cache_level__fprintf(fp, &ff->ph->env.caches[i]);
+ }
+}
+
+static void print_compressed(struct feat_fd *ff, FILE *fp)
+{
+ fprintf(fp, "# compressed : %s, level = %d, ratio = %d\n",
+ ff->ph->env.comp_type == PERF_COMP_ZSTD ? "Zstd" : "Unknown",
+ ff->ph->env.comp_level, ff->ph->env.comp_ratio);
+}
+
+static void print_cpu_pmu_caps(struct feat_fd *ff, FILE *fp)
+{
+ const char *delimiter = "# cpu pmu capabilities: ";
+ u32 nr_caps = ff->ph->env.nr_cpu_pmu_caps;
+ char *str;
+
+ if (!nr_caps) {
+ fprintf(fp, "# cpu pmu capabilities: not available\n");
+ return;
+ }
+
+ str = ff->ph->env.cpu_pmu_caps;
+ while (nr_caps--) {
+ fprintf(fp, "%s%s", delimiter, str);
+ delimiter = ", ";
+ str += strlen(str) + 1;
+ }
+
+ fprintf(fp, "\n");
+}
+
+static void print_pmu_mappings(struct feat_fd *ff, FILE *fp)
+{
+ const char *delimiter = "# pmu mappings: ";
+ char *str, *tmp;
+ u32 pmu_num;
+ u32 type;
+
+ pmu_num = ff->ph->env.nr_pmu_mappings;
+ if (!pmu_num) {
+ fprintf(fp, "# pmu mappings: not available\n");
+ return;
+ }
+
+ str = ff->ph->env.pmu_mappings;
+
+ while (pmu_num) {
+ type = strtoul(str, &tmp, 0);
+ if (*tmp != ':')
+ goto error;
+
+ str = tmp + 1;
+ fprintf(fp, "%s%s = %" PRIu32, delimiter, str, type);
+
+ delimiter = ", ";
+ str += strlen(str) + 1;
+ pmu_num--;
+ }
+
+ fprintf(fp, "\n");
+
+ if (!pmu_num)
+ return;
+error:
+ fprintf(fp, "# pmu mappings: unable to read\n");
+}
+
+static void print_group_desc(struct feat_fd *ff, FILE *fp)
+{
+ struct perf_session *session;
+ struct evsel *evsel;
+ u32 nr = 0;
+
+ session = container_of(ff->ph, struct perf_session, header);
+
+ evlist__for_each_entry(session->evlist, evsel) {
+ if (evsel__is_group_leader(evsel) && evsel->core.nr_members > 1) {
+ fprintf(fp, "# group: %s{%s", evsel->group_name ?: "", evsel__name(evsel));
+
+ nr = evsel->core.nr_members - 1;
+ } else if (nr) {
+ fprintf(fp, ",%s", evsel__name(evsel));
+
+ if (--nr == 0)
+ fprintf(fp, "}\n");
+ }
+ }
+}
+
+static void print_sample_time(struct feat_fd *ff, FILE *fp)
+{
+ struct perf_session *session;
+ char time_buf[32];
+ double d;
+
+ session = container_of(ff->ph, struct perf_session, header);
+
+ timestamp__scnprintf_usec(session->evlist->first_sample_time,
+ time_buf, sizeof(time_buf));
+ fprintf(fp, "# time of first sample : %s\n", time_buf);
+
+ timestamp__scnprintf_usec(session->evlist->last_sample_time,
+ time_buf, sizeof(time_buf));
+ fprintf(fp, "# time of last sample : %s\n", time_buf);
+
+ d = (double)(session->evlist->last_sample_time -
+ session->evlist->first_sample_time) / NSEC_PER_MSEC;
+
+ fprintf(fp, "# sample duration : %10.3f ms\n", d);
+}
+
+static void memory_node__fprintf(struct memory_node *n,
+ unsigned long long bsize, FILE *fp)
+{
+ char buf_map[100], buf_size[50];
+ unsigned long long size;
+
+ size = bsize * bitmap_weight(n->set, n->size);
+ unit_number__scnprintf(buf_size, 50, size);
+
+ bitmap_scnprintf(n->set, n->size, buf_map, 100);
+ fprintf(fp, "# %3" PRIu64 " [%s]: %s\n", n->node, buf_size, buf_map);
+}
+
+static void print_mem_topology(struct feat_fd *ff, FILE *fp)
+{
+ struct memory_node *nodes;
+ int i, nr;
+
+ nodes = ff->ph->env.memory_nodes;
+ nr = ff->ph->env.nr_memory_nodes;
+
+ fprintf(fp, "# memory nodes (nr %d, block size 0x%llx):\n",
+ nr, ff->ph->env.memory_bsize);
+
+ for (i = 0; i < nr; i++) {
+ memory_node__fprintf(&nodes[i], ff->ph->env.memory_bsize, fp);
+ }
+}
+
+static int __event_process_build_id(struct perf_record_header_build_id *bev,
+ char *filename,
+ struct perf_session *session)
+{
+ int err = -1;
+ struct machine *machine;
+ u16 cpumode;
+ struct dso *dso;
+ enum dso_space_type dso_space;
+
+ machine = perf_session__findnew_machine(session, bev->pid);
+ if (!machine)
+ goto out;
+
+ cpumode = bev->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
+
+ switch (cpumode) {
+ case PERF_RECORD_MISC_KERNEL:
+ dso_space = DSO_SPACE__KERNEL;
+ break;
+ case PERF_RECORD_MISC_GUEST_KERNEL:
+ dso_space = DSO_SPACE__KERNEL_GUEST;
+ break;
+ case PERF_RECORD_MISC_USER:
+ case PERF_RECORD_MISC_GUEST_USER:
+ dso_space = DSO_SPACE__USER;
+ break;
+ default:
+ goto out;
+ }
+
+ dso = machine__findnew_dso(machine, filename);
+ if (dso != NULL) {
+ char sbuild_id[SBUILD_ID_SIZE];
+ struct build_id bid;
+ size_t size = BUILD_ID_SIZE;
+
+ if (bev->header.misc & PERF_RECORD_MISC_BUILD_ID_SIZE)
+ size = bev->size;
+
+ build_id__init(&bid, bev->data, size);
+ dso__set_build_id(dso, &bid);
+
+ if (dso_space != DSO_SPACE__USER) {
+ struct kmod_path m = { .name = NULL, };
+
+ if (!kmod_path__parse_name(&m, filename) && m.kmod)
+ dso__set_module_info(dso, &m, machine);
+
+ dso->kernel = dso_space;
+ free(m.name);
+ }
+
+ build_id__sprintf(&dso->bid, sbuild_id);
+ pr_debug("build id event received for %s: %s [%zu]\n",
+ dso->long_name, sbuild_id, size);
+ dso__put(dso);
+ }
+
+ err = 0;
+out:
+ return err;
+}
+
+static int perf_header__read_build_ids_abi_quirk(struct perf_header *header,
+ int input, u64 offset, u64 size)
+{
+ struct perf_session *session = container_of(header, struct perf_session, header);
+ struct {
+ struct perf_event_header header;
+ u8 build_id[PERF_ALIGN(BUILD_ID_SIZE, sizeof(u64))];
+ char filename[0];
+ } old_bev;
+ struct perf_record_header_build_id bev;
+ char filename[PATH_MAX];
+ u64 limit = offset + size;
+
+ while (offset < limit) {
+ ssize_t len;
+
+ if (readn(input, &old_bev, sizeof(old_bev)) != sizeof(old_bev))
+ return -1;
+
+ if (header->needs_swap)
+ perf_event_header__bswap(&old_bev.header);
+
+ len = old_bev.header.size - sizeof(old_bev);
+ if (readn(input, filename, len) != len)
+ return -1;
+
+ bev.header = old_bev.header;
+
+ /*
+ * As the pid is the missing value, we need to fill
+ * it properly. The header.misc value give us nice hint.
+ */
+ bev.pid = HOST_KERNEL_ID;
+ if (bev.header.misc == PERF_RECORD_MISC_GUEST_USER ||
+ bev.header.misc == PERF_RECORD_MISC_GUEST_KERNEL)
+ bev.pid = DEFAULT_GUEST_KERNEL_ID;
+
+ memcpy(bev.build_id, old_bev.build_id, sizeof(bev.build_id));
+ __event_process_build_id(&bev, filename, session);
+
+ offset += bev.header.size;
+ }
+
+ return 0;
+}
+
+static int perf_header__read_build_ids(struct perf_header *header,
+ int input, u64 offset, u64 size)
+{
+ struct perf_session *session = container_of(header, struct perf_session, header);
+ struct perf_record_header_build_id bev;
+ char filename[PATH_MAX];
+ u64 limit = offset + size, orig_offset = offset;
+ int err = -1;
+
+ while (offset < limit) {
+ ssize_t len;
+
+ if (readn(input, &bev, sizeof(bev)) != sizeof(bev))
+ goto out;
+
+ if (header->needs_swap)
+ perf_event_header__bswap(&bev.header);
+
+ len = bev.header.size - sizeof(bev);
+ if (readn(input, filename, len) != len)
+ goto out;
+ /*
+ * The a1645ce1 changeset:
+ *
+ * "perf: 'perf kvm' tool for monitoring guest performance from host"
+ *
+ * Added a field to struct perf_record_header_build_id that broke the file
+ * format.
+ *
+ * Since the kernel build-id is the first entry, process the
+ * table using the old format if the well known
+ * '[kernel.kallsyms]' string for the kernel build-id has the
+ * first 4 characters chopped off (where the pid_t sits).
+ */
+ if (memcmp(filename, "nel.kallsyms]", 13) == 0) {
+ if (lseek(input, orig_offset, SEEK_SET) == (off_t)-1)
+ return -1;
+ return perf_header__read_build_ids_abi_quirk(header, input, offset, size);
+ }
+
+ __event_process_build_id(&bev, filename, session);
+
+ offset += bev.header.size;
+ }
+ err = 0;
+out:
+ return err;
+}
+
+/* Macro for features that simply need to read and store a string. */
+#define FEAT_PROCESS_STR_FUN(__feat, __feat_env) \
+static int process_##__feat(struct feat_fd *ff, void *data __maybe_unused) \
+{\
+ ff->ph->env.__feat_env = do_read_string(ff); \
+ return ff->ph->env.__feat_env ? 0 : -ENOMEM; \
+}
+
+FEAT_PROCESS_STR_FUN(hostname, hostname);
+FEAT_PROCESS_STR_FUN(osrelease, os_release);
+FEAT_PROCESS_STR_FUN(version, version);
+FEAT_PROCESS_STR_FUN(arch, arch);
+FEAT_PROCESS_STR_FUN(cpudesc, cpu_desc);
+FEAT_PROCESS_STR_FUN(cpuid, cpuid);
+
+static int process_tracing_data(struct feat_fd *ff, void *data)
+{
+ ssize_t ret = trace_report(ff->fd, data, false);
+
+ return ret < 0 ? -1 : 0;
+}
+
+static int process_build_id(struct feat_fd *ff, void *data __maybe_unused)
+{
+ if (perf_header__read_build_ids(ff->ph, ff->fd, ff->offset, ff->size))
+ pr_debug("Failed to read buildids, continuing...\n");
+ return 0;
+}
+
+static int process_nrcpus(struct feat_fd *ff, void *data __maybe_unused)
+{
+ int ret;
+ u32 nr_cpus_avail, nr_cpus_online;
+
+ ret = do_read_u32(ff, &nr_cpus_avail);
+ if (ret)
+ return ret;
+
+ ret = do_read_u32(ff, &nr_cpus_online);
+ if (ret)
+ return ret;
+ ff->ph->env.nr_cpus_avail = (int)nr_cpus_avail;
+ ff->ph->env.nr_cpus_online = (int)nr_cpus_online;
+ return 0;
+}
+
+static int process_total_mem(struct feat_fd *ff, void *data __maybe_unused)
+{
+ u64 total_mem;
+ int ret;
+
+ ret = do_read_u64(ff, &total_mem);
+ if (ret)
+ return -1;
+ ff->ph->env.total_mem = (unsigned long long)total_mem;
+ return 0;
+}
+
+static struct evsel *
+perf_evlist__find_by_index(struct evlist *evlist, int idx)
+{
+ struct evsel *evsel;
+
+ evlist__for_each_entry(evlist, evsel) {
+ if (evsel->idx == idx)
+ return evsel;
+ }
+
+ return NULL;
+}
+
+static void
+perf_evlist__set_event_name(struct evlist *evlist,
+ struct evsel *event)
+{
+ struct evsel *evsel;
+
+ if (!event->name)
+ return;
+
+ evsel = perf_evlist__find_by_index(evlist, event->idx);
+ if (!evsel)
+ return;
+
+ if (evsel->name)
+ return;
+
+ evsel->name = strdup(event->name);
+}
+
+static int
+process_event_desc(struct feat_fd *ff, void *data __maybe_unused)
+{
+ struct perf_session *session;
+ struct evsel *evsel, *events = read_event_desc(ff);
+
+ if (!events)
+ return 0;
+
+ session = container_of(ff->ph, struct perf_session, header);
+
+ if (session->data->is_pipe) {
+ /* Save events for reading later by print_event_desc,
+ * since they can't be read again in pipe mode. */
+ ff->events = events;
+ }
+
+ for (evsel = events; evsel->core.attr.size; evsel++)
+ perf_evlist__set_event_name(session->evlist, evsel);
+
+ if (!session->data->is_pipe)
+ free_event_desc(events);
+
+ return 0;
+}
+
+static int process_cmdline(struct feat_fd *ff, void *data __maybe_unused)
+{
+ char *str, *cmdline = NULL, **argv = NULL;
+ u32 nr, i, len = 0;
+
+ if (do_read_u32(ff, &nr))
+ return -1;
+
+ ff->ph->env.nr_cmdline = nr;
+
+ cmdline = zalloc(ff->size + nr + 1);
+ if (!cmdline)
+ return -1;
+
+ argv = zalloc(sizeof(char *) * (nr + 1));
+ if (!argv)
+ goto error;
+
+ for (i = 0; i < nr; i++) {
+ str = do_read_string(ff);
+ if (!str)
+ goto error;
+
+ argv[i] = cmdline + len;
+ memcpy(argv[i], str, strlen(str) + 1);
+ len += strlen(str) + 1;
+ free(str);
+ }
+ ff->ph->env.cmdline = cmdline;
+ ff->ph->env.cmdline_argv = (const char **) argv;
+ return 0;
+
+error:
+ free(argv);
+ free(cmdline);
+ return -1;
+}
+
+static int process_cpu_topology(struct feat_fd *ff, void *data __maybe_unused)
+{
+ u32 nr, i;
+ char *str;
+ struct strbuf sb;
+ int cpu_nr = ff->ph->env.nr_cpus_avail;
+ u64 size = 0;
+ struct perf_header *ph = ff->ph;
+ bool do_core_id_test = true;
+
+ ph->env.cpu = calloc(cpu_nr, sizeof(*ph->env.cpu));
+ if (!ph->env.cpu)
+ return -1;
+
+ if (do_read_u32(ff, &nr))
+ goto free_cpu;
+
+ ph->env.nr_sibling_cores = nr;
+ size += sizeof(u32);
+ if (strbuf_init(&sb, 128) < 0)
+ goto free_cpu;
+
+ for (i = 0; i < nr; i++) {
+ str = do_read_string(ff);
+ if (!str)
+ goto error;
+
+ /* include a NULL character at the end */
+ if (strbuf_add(&sb, str, strlen(str) + 1) < 0)
+ goto error;
+ size += string_size(str);
+ free(str);
+ }
+ ph->env.sibling_cores = strbuf_detach(&sb, NULL);
+
+ if (do_read_u32(ff, &nr))
+ return -1;
+
+ ph->env.nr_sibling_threads = nr;
+ size += sizeof(u32);
+
+ for (i = 0; i < nr; i++) {
+ str = do_read_string(ff);
+ if (!str)
+ goto error;
+
+ /* include a NULL character at the end */
+ if (strbuf_add(&sb, str, strlen(str) + 1) < 0)
+ goto error;
+ size += string_size(str);
+ free(str);
+ }
+ ph->env.sibling_threads = strbuf_detach(&sb, NULL);
+
+ /*
+ * The header may be from old perf,
+ * which doesn't include core id and socket id information.
+ */
+ if (ff->size <= size) {
+ zfree(&ph->env.cpu);
+ return 0;
+ }
+
+ /* On s390 the socket_id number is not related to the numbers of cpus.
+ * The socket_id number might be higher than the numbers of cpus.
+ * This depends on the configuration.
+ * AArch64 is the same.
+ */
+ if (ph->env.arch && (!strncmp(ph->env.arch, "s390", 4)
+ || !strncmp(ph->env.arch, "aarch64", 7)))
+ do_core_id_test = false;
+
+ for (i = 0; i < (u32)cpu_nr; i++) {
+ if (do_read_u32(ff, &nr))
+ goto free_cpu;
+
+ ph->env.cpu[i].core_id = nr;
+ size += sizeof(u32);
+
+ if (do_read_u32(ff, &nr))
+ goto free_cpu;
+
+ if (do_core_id_test && nr != (u32)-1 && nr > (u32)cpu_nr) {
+ pr_debug("socket_id number is too big."
+ "You may need to upgrade the perf tool.\n");
+ goto free_cpu;
+ }
+
+ ph->env.cpu[i].socket_id = nr;
+ size += sizeof(u32);
+ }
+
+ /*
+ * The header may be from old perf,
+ * which doesn't include die information.
+ */
+ if (ff->size <= size)
+ return 0;
+
+ if (do_read_u32(ff, &nr))
+ return -1;
+
+ ph->env.nr_sibling_dies = nr;
+ size += sizeof(u32);
+
+ for (i = 0; i < nr; i++) {
+ str = do_read_string(ff);
+ if (!str)
+ goto error;
+
+ /* include a NULL character at the end */
+ if (strbuf_add(&sb, str, strlen(str) + 1) < 0)
+ goto error;
+ size += string_size(str);
+ free(str);
+ }
+ ph->env.sibling_dies = strbuf_detach(&sb, NULL);
+
+ for (i = 0; i < (u32)cpu_nr; i++) {
+ if (do_read_u32(ff, &nr))
+ goto free_cpu;
+
+ ph->env.cpu[i].die_id = nr;
+ }
+
+ return 0;
+
+error:
+ strbuf_release(&sb);
+free_cpu:
+ zfree(&ph->env.cpu);
+ return -1;
+}
+
+static int process_numa_topology(struct feat_fd *ff, void *data __maybe_unused)
+{
+ struct numa_node *nodes, *n;
+ u32 nr, i;
+ char *str;
+
+ /* nr nodes */
+ if (do_read_u32(ff, &nr))
+ return -1;
+
+ nodes = zalloc(sizeof(*nodes) * nr);
+ if (!nodes)
+ return -ENOMEM;
+
+ for (i = 0; i < nr; i++) {
+ n = &nodes[i];
+
+ /* node number */
+ if (do_read_u32(ff, &n->node))
+ goto error;
+
+ if (do_read_u64(ff, &n->mem_total))
+ goto error;
+
+ if (do_read_u64(ff, &n->mem_free))
+ goto error;
+
+ str = do_read_string(ff);
+ if (!str)
+ goto error;
+
+ n->map = perf_cpu_map__new(str);
+ if (!n->map)
+ goto error;
+
+ free(str);
+ }
+ ff->ph->env.nr_numa_nodes = nr;
+ ff->ph->env.numa_nodes = nodes;
+ return 0;
+
+error:
+ free(nodes);
+ return -1;
+}
+
+static int process_pmu_mappings(struct feat_fd *ff, void *data __maybe_unused)
+{
+ char *name;
+ u32 pmu_num;
+ u32 type;
+ struct strbuf sb;
+
+ if (do_read_u32(ff, &pmu_num))
+ return -1;
+
+ if (!pmu_num) {
+ pr_debug("pmu mappings not available\n");
+ return 0;
+ }
+
+ ff->ph->env.nr_pmu_mappings = pmu_num;
+ if (strbuf_init(&sb, 128) < 0)
+ return -1;
+
+ while (pmu_num) {
+ if (do_read_u32(ff, &type))
+ goto error;
+
+ name = do_read_string(ff);
+ if (!name)
+ goto error;
+
+ if (strbuf_addf(&sb, "%u:%s", type, name) < 0)
+ goto error;
+ /* include a NULL character at the end */
+ if (strbuf_add(&sb, "", 1) < 0)
+ goto error;
+
+ if (!strcmp(name, "msr"))
+ ff->ph->env.msr_pmu_type = type;
+
+ free(name);
+ pmu_num--;
+ }
+ ff->ph->env.pmu_mappings = strbuf_detach(&sb, NULL);
+ return 0;
+
+error:
+ strbuf_release(&sb);
+ return -1;
+}
+
+static int process_group_desc(struct feat_fd *ff, void *data __maybe_unused)
+{
+ size_t ret = -1;
+ u32 i, nr, nr_groups;
+ struct perf_session *session;
+ struct evsel *evsel, *leader = NULL;
+ struct group_desc {
+ char *name;
+ u32 leader_idx;
+ u32 nr_members;
+ } *desc;
+
+ if (do_read_u32(ff, &nr_groups))
+ return -1;
+
+ ff->ph->env.nr_groups = nr_groups;
+ if (!nr_groups) {
+ pr_debug("group desc not available\n");
+ return 0;
+ }
+
+ desc = calloc(nr_groups, sizeof(*desc));
+ if (!desc)
+ return -1;
+
+ for (i = 0; i < nr_groups; i++) {
+ desc[i].name = do_read_string(ff);
+ if (!desc[i].name)
+ goto out_free;
+
+ if (do_read_u32(ff, &desc[i].leader_idx))
+ goto out_free;
+
+ if (do_read_u32(ff, &desc[i].nr_members))
+ goto out_free;
+ }
+
+ /*
+ * Rebuild group relationship based on the group_desc
+ */
+ session = container_of(ff->ph, struct perf_session, header);
+ session->evlist->nr_groups = nr_groups;
+
+ i = nr = 0;
+ evlist__for_each_entry(session->evlist, evsel) {
+ if (evsel->idx == (int) desc[i].leader_idx) {
+ evsel->leader = evsel;
+ /* {anon_group} is a dummy name */
+ if (strcmp(desc[i].name, "{anon_group}")) {
+ evsel->group_name = desc[i].name;
+ desc[i].name = NULL;
+ }
+ evsel->core.nr_members = desc[i].nr_members;
+
+ if (i >= nr_groups || nr > 0) {
+ pr_debug("invalid group desc\n");
+ goto out_free;
+ }
+
+ leader = evsel;
+ nr = evsel->core.nr_members - 1;
+ i++;
+ } else if (nr) {
+ /* This is a group member */
+ evsel->leader = leader;
+
+ nr--;
+ }
+ }
+
+ if (i != nr_groups || nr != 0) {
+ pr_debug("invalid group desc\n");
+ goto out_free;
+ }
+
+ ret = 0;
+out_free:
+ for (i = 0; i < nr_groups; i++)
+ zfree(&desc[i].name);
+ free(desc);
+
+ return ret;
+}
+
+static int process_auxtrace(struct feat_fd *ff, void *data __maybe_unused)
+{
+ struct perf_session *session;
+ int err;
+
+ session = container_of(ff->ph, struct perf_session, header);
+
+ err = auxtrace_index__process(ff->fd, ff->size, session,
+ ff->ph->needs_swap);
+ if (err < 0)
+ pr_err("Failed to process auxtrace index\n");
+ return err;
+}
+
+static int process_cache(struct feat_fd *ff, void *data __maybe_unused)
+{
+ struct cpu_cache_level *caches;
+ u32 cnt, i, version;
+
+ if (do_read_u32(ff, &version))
+ return -1;
+
+ if (version != 1)
+ return -1;
+
+ if (do_read_u32(ff, &cnt))
+ return -1;
+
+ caches = zalloc(sizeof(*caches) * cnt);
+ if (!caches)
+ return -1;
+
+ for (i = 0; i < cnt; i++) {
+ struct cpu_cache_level c;
+
+ #define _R(v) \
+ if (do_read_u32(ff, &c.v))\
+ goto out_free_caches; \
+
+ _R(level)
+ _R(line_size)
+ _R(sets)
+ _R(ways)
+ #undef _R
+
+ #define _R(v) \
+ c.v = do_read_string(ff); \
+ if (!c.v) \
+ goto out_free_caches;
+
+ _R(type)
+ _R(size)
+ _R(map)
+ #undef _R
+
+ caches[i] = c;
+ }
+
+ ff->ph->env.caches = caches;
+ ff->ph->env.caches_cnt = cnt;
+ return 0;
+out_free_caches:
+ free(caches);
+ return -1;
+}
+
+static int process_sample_time(struct feat_fd *ff, void *data __maybe_unused)
+{
+ struct perf_session *session;
+ u64 first_sample_time, last_sample_time;
+ int ret;
+
+ session = container_of(ff->ph, struct perf_session, header);
+
+ ret = do_read_u64(ff, &first_sample_time);
+ if (ret)
+ return -1;
+
+ ret = do_read_u64(ff, &last_sample_time);
+ if (ret)
+ return -1;
+
+ session->evlist->first_sample_time = first_sample_time;
+ session->evlist->last_sample_time = last_sample_time;
+ return 0;
+}
+
+static int process_mem_topology(struct feat_fd *ff,
+ void *data __maybe_unused)
+{
+ struct memory_node *nodes;
+ u64 version, i, nr, bsize;
+ int ret = -1;
+
+ if (do_read_u64(ff, &version))
+ return -1;
+
+ if (version != 1)
+ return -1;
+
+ if (do_read_u64(ff, &bsize))
+ return -1;
+
+ if (do_read_u64(ff, &nr))
+ return -1;
+
+ nodes = zalloc(sizeof(*nodes) * nr);
+ if (!nodes)
+ return -1;
+
+ for (i = 0; i < nr; i++) {
+ struct memory_node n;
+
+ #define _R(v) \
+ if (do_read_u64(ff, &n.v)) \
+ goto out; \
+
+ _R(node)
+ _R(size)
+
+ #undef _R
+
+ if (do_read_bitmap(ff, &n.set, &n.size))
+ goto out;
+
+ nodes[i] = n;
+ }
+
+ ff->ph->env.memory_bsize = bsize;
+ ff->ph->env.memory_nodes = nodes;
+ ff->ph->env.nr_memory_nodes = nr;
+ ret = 0;
+
+out:
+ if (ret)
+ free(nodes);
+ return ret;
+}
+
+static int process_clockid(struct feat_fd *ff,
+ void *data __maybe_unused)
+{
+ if (do_read_u64(ff, &ff->ph->env.clock.clockid_res_ns))
+ return -1;
+
+ return 0;
+}
+
+static int process_clock_data(struct feat_fd *ff,
+ void *_data __maybe_unused)
+{
+ u32 data32;
+ u64 data64;
+
+ /* version */
+ if (do_read_u32(ff, &data32))
+ return -1;
+
+ if (data32 != 1)
+ return -1;
+
+ /* clockid */
+ if (do_read_u32(ff, &data32))
+ return -1;
+
+ ff->ph->env.clock.clockid = data32;
+
+ /* TOD ref time */
+ if (do_read_u64(ff, &data64))
+ return -1;
+
+ ff->ph->env.clock.tod_ns = data64;
+
+ /* clockid ref time */
+ if (do_read_u64(ff, &data64))
+ return -1;
+
+ ff->ph->env.clock.clockid_ns = data64;
+ ff->ph->env.clock.enabled = true;
+ return 0;
+}
+
+static int process_dir_format(struct feat_fd *ff,
+ void *_data __maybe_unused)
+{
+ struct perf_session *session;
+ struct perf_data *data;
+
+ session = container_of(ff->ph, struct perf_session, header);
+ data = session->data;
+
+ if (WARN_ON(!perf_data__is_dir(data)))
+ return -1;
+
+ return do_read_u64(ff, &data->dir.version);
+}
+
+#ifdef HAVE_LIBBPF_SUPPORT
+static int process_bpf_prog_info(struct feat_fd *ff, void *data __maybe_unused)
+{
+ struct bpf_prog_info_linear *info_linear;
+ struct bpf_prog_info_node *info_node;
+ struct perf_env *env = &ff->ph->env;
+ u32 count, i;
+ int err = -1;
+
+ if (ff->ph->needs_swap) {
+ pr_warning("interpreting bpf_prog_info from systems with endianity is not yet supported\n");
+ return 0;
+ }
+
+ if (do_read_u32(ff, &count))
+ return -1;
+
+ down_write(&env->bpf_progs.lock);
+
+ for (i = 0; i < count; ++i) {
+ u32 info_len, data_len;
+
+ info_linear = NULL;
+ info_node = NULL;
+ if (do_read_u32(ff, &info_len))
+ goto out;
+ if (do_read_u32(ff, &data_len))
+ goto out;
+
+ if (info_len > sizeof(struct bpf_prog_info)) {
+ pr_warning("detected invalid bpf_prog_info\n");
+ goto out;
+ }
+
+ info_linear = malloc(sizeof(struct bpf_prog_info_linear) +
+ data_len);
+ if (!info_linear)
+ goto out;
+ info_linear->info_len = sizeof(struct bpf_prog_info);
+ info_linear->data_len = data_len;
+ if (do_read_u64(ff, (u64 *)(&info_linear->arrays)))
+ goto out;
+ if (__do_read(ff, &info_linear->info, info_len))
+ goto out;
+ if (info_len < sizeof(struct bpf_prog_info))
+ memset(((void *)(&info_linear->info)) + info_len, 0,
+ sizeof(struct bpf_prog_info) - info_len);
+
+ if (__do_read(ff, info_linear->data, data_len))
+ goto out;
+
+ info_node = malloc(sizeof(struct bpf_prog_info_node));
+ if (!info_node)
+ goto out;
+
+ /* after reading from file, translate offset to address */
+ bpf_program__bpil_offs_to_addr(info_linear);
+ info_node->info_linear = info_linear;
+ __perf_env__insert_bpf_prog_info(env, info_node);
+ }
+
+ up_write(&env->bpf_progs.lock);
+ return 0;
+out:
+ free(info_linear);
+ free(info_node);
+ up_write(&env->bpf_progs.lock);
+ return err;
+}
+#else // HAVE_LIBBPF_SUPPORT
+static int process_bpf_prog_info(struct feat_fd *ff __maybe_unused, void *data __maybe_unused)
+{
+ return 0;
+}
+#endif // HAVE_LIBBPF_SUPPORT
+
+static int process_bpf_btf(struct feat_fd *ff, void *data __maybe_unused)
+{
+ struct perf_env *env = &ff->ph->env;
+ struct btf_node *node = NULL;
+ u32 count, i;
+ int err = -1;
+
+ if (ff->ph->needs_swap) {
+ pr_warning("interpreting btf from systems with endianity is not yet supported\n");
+ return 0;
+ }
+
+ if (do_read_u32(ff, &count))
+ return -1;
+
+ down_write(&env->bpf_progs.lock);
+
+ for (i = 0; i < count; ++i) {
+ u32 id, data_size;
+
+ if (do_read_u32(ff, &id))
+ goto out;
+ if (do_read_u32(ff, &data_size))
+ goto out;
+
+ node = malloc(sizeof(struct btf_node) + data_size);
+ if (!node)
+ goto out;
+
+ node->id = id;
+ node->data_size = data_size;
+
+ if (__do_read(ff, node->data, data_size))
+ goto out;
+
+ __perf_env__insert_btf(env, node);
+ node = NULL;
+ }
+
+ err = 0;
+out:
+ up_write(&env->bpf_progs.lock);
+ free(node);
+ return err;
+}
+
+static int process_compressed(struct feat_fd *ff,
+ void *data __maybe_unused)
+{
+ if (do_read_u32(ff, &(ff->ph->env.comp_ver)))
+ return -1;
+
+ if (do_read_u32(ff, &(ff->ph->env.comp_type)))
+ return -1;
+
+ if (do_read_u32(ff, &(ff->ph->env.comp_level)))
+ return -1;
+
+ if (do_read_u32(ff, &(ff->ph->env.comp_ratio)))
+ return -1;
+
+ if (do_read_u32(ff, &(ff->ph->env.comp_mmap_len)))
+ return -1;
+
+ return 0;
+}
+
+static int process_cpu_pmu_caps(struct feat_fd *ff,
+ void *data __maybe_unused)
+{
+ char *name, *value;
+ struct strbuf sb;
+ u32 nr_caps;
+
+ if (do_read_u32(ff, &nr_caps))
+ return -1;
+
+ if (!nr_caps) {
+ pr_debug("cpu pmu capabilities not available\n");
+ return 0;
+ }
+
+ ff->ph->env.nr_cpu_pmu_caps = nr_caps;
+
+ if (strbuf_init(&sb, 128) < 0)
+ return -1;
+
+ while (nr_caps--) {
+ name = do_read_string(ff);
+ if (!name)
+ goto error;
+
+ value = do_read_string(ff);
+ if (!value)
+ goto free_name;
+
+ if (strbuf_addf(&sb, "%s=%s", name, value) < 0)
+ goto free_value;
+
+ /* include a NULL character at the end */
+ if (strbuf_add(&sb, "", 1) < 0)
+ goto free_value;
+
+ if (!strcmp(name, "branches"))
+ ff->ph->env.max_branches = atoi(value);
+
+ free(value);
+ free(name);
+ }
+ ff->ph->env.cpu_pmu_caps = strbuf_detach(&sb, NULL);
+ return 0;
+
+free_value:
+ free(value);
+free_name:
+ free(name);
+error:
+ strbuf_release(&sb);
+ return -1;
+}
+
+#define FEAT_OPR(n, func, __full_only) \
+ [HEADER_##n] = { \
+ .name = __stringify(n), \
+ .write = write_##func, \
+ .print = print_##func, \
+ .full_only = __full_only, \
+ .process = process_##func, \
+ .synthesize = true \
+ }
+
+#define FEAT_OPN(n, func, __full_only) \
+ [HEADER_##n] = { \
+ .name = __stringify(n), \
+ .write = write_##func, \
+ .print = print_##func, \
+ .full_only = __full_only, \
+ .process = process_##func \
+ }
+
+/* feature_ops not implemented: */
+#define print_tracing_data NULL
+#define print_build_id NULL
+
+#define process_branch_stack NULL
+#define process_stat NULL
+
+// Only used in util/synthetic-events.c
+const struct perf_header_feature_ops feat_ops[HEADER_LAST_FEATURE];
+
+const struct perf_header_feature_ops feat_ops[HEADER_LAST_FEATURE] = {
+ FEAT_OPN(TRACING_DATA, tracing_data, false),
+ FEAT_OPN(BUILD_ID, build_id, false),
+ FEAT_OPR(HOSTNAME, hostname, false),
+ FEAT_OPR(OSRELEASE, osrelease, false),
+ FEAT_OPR(VERSION, version, false),
+ FEAT_OPR(ARCH, arch, false),
+ FEAT_OPR(NRCPUS, nrcpus, false),
+ FEAT_OPR(CPUDESC, cpudesc, false),
+ FEAT_OPR(CPUID, cpuid, false),
+ FEAT_OPR(TOTAL_MEM, total_mem, false),
+ FEAT_OPR(EVENT_DESC, event_desc, false),
+ FEAT_OPR(CMDLINE, cmdline, false),
+ FEAT_OPR(CPU_TOPOLOGY, cpu_topology, true),
+ FEAT_OPR(NUMA_TOPOLOGY, numa_topology, true),
+ FEAT_OPN(BRANCH_STACK, branch_stack, false),
+ FEAT_OPR(PMU_MAPPINGS, pmu_mappings, false),
+ FEAT_OPR(GROUP_DESC, group_desc, false),
+ FEAT_OPN(AUXTRACE, auxtrace, false),
+ FEAT_OPN(STAT, stat, false),
+ FEAT_OPN(CACHE, cache, true),
+ FEAT_OPR(SAMPLE_TIME, sample_time, false),
+ FEAT_OPR(MEM_TOPOLOGY, mem_topology, true),
+ FEAT_OPR(CLOCKID, clockid, false),
+ FEAT_OPN(DIR_FORMAT, dir_format, false),
+ FEAT_OPR(BPF_PROG_INFO, bpf_prog_info, false),
+ FEAT_OPR(BPF_BTF, bpf_btf, false),
+ FEAT_OPR(COMPRESSED, compressed, false),
+ FEAT_OPR(CPU_PMU_CAPS, cpu_pmu_caps, false),
+ FEAT_OPR(CLOCK_DATA, clock_data, false),
+};
+
+struct header_print_data {
+ FILE *fp;
+ bool full; /* extended list of headers */
+};
+
+static int perf_file_section__fprintf_info(struct perf_file_section *section,
+ struct perf_header *ph,
+ int feat, int fd, void *data)
+{
+ struct header_print_data *hd = data;
+ struct feat_fd ff;
+
+ if (lseek(fd, section->offset, SEEK_SET) == (off_t)-1) {
+ pr_debug("Failed to lseek to %" PRIu64 " offset for feature "
+ "%d, continuing...\n", section->offset, feat);
+ return 0;
+ }
+ if (feat >= HEADER_LAST_FEATURE) {
+ pr_warning("unknown feature %d\n", feat);
+ return 0;
+ }
+ if (!feat_ops[feat].print)
+ return 0;
+
+ ff = (struct feat_fd) {
+ .fd = fd,
+ .ph = ph,
+ };
+
+ if (!feat_ops[feat].full_only || hd->full)
+ feat_ops[feat].print(&ff, hd->fp);
+ else
+ fprintf(hd->fp, "# %s info available, use -I to display\n",
+ feat_ops[feat].name);
+
+ return 0;
+}
+
+int perf_header__fprintf_info(struct perf_session *session, FILE *fp, bool full)
+{
+ struct header_print_data hd;
+ struct perf_header *header = &session->header;
+ int fd = perf_data__fd(session->data);
+ struct stat st;
+ time_t stctime;
+ int ret, bit;
+
+ hd.fp = fp;
+ hd.full = full;
+
+ ret = fstat(fd, &st);
+ if (ret == -1)
+ return -1;
+
+ stctime = st.st_mtime;
+ fprintf(fp, "# captured on : %s", ctime(&stctime));
+
+ fprintf(fp, "# header version : %u\n", header->version);
+ fprintf(fp, "# data offset : %" PRIu64 "\n", header->data_offset);
+ fprintf(fp, "# data size : %" PRIu64 "\n", header->data_size);
+ fprintf(fp, "# feat offset : %" PRIu64 "\n", header->feat_offset);
+
+ perf_header__process_sections(header, fd, &hd,
+ perf_file_section__fprintf_info);
+
+ if (session->data->is_pipe)
+ return 0;
+
+ fprintf(fp, "# missing features: ");
+ for_each_clear_bit(bit, header->adds_features, HEADER_LAST_FEATURE) {
+ if (bit)
+ fprintf(fp, "%s ", feat_ops[bit].name);
+ }
+
+ fprintf(fp, "\n");
+ return 0;
+}
+
+static int do_write_feat(struct feat_fd *ff, int type,
+ struct perf_file_section **p,
+ struct evlist *evlist)
+{
+ int err;
+ int ret = 0;
+
+ if (perf_header__has_feat(ff->ph, type)) {
+ if (!feat_ops[type].write)
+ return -1;
+
+ if (WARN(ff->buf, "Error: calling %s in pipe-mode.\n", __func__))
+ return -1;
+
+ (*p)->offset = lseek(ff->fd, 0, SEEK_CUR);
+
+ err = feat_ops[type].write(ff, evlist);
+ if (err < 0) {
+ pr_debug("failed to write feature %s\n", feat_ops[type].name);
+
+ /* undo anything written */
+ lseek(ff->fd, (*p)->offset, SEEK_SET);
+
+ return -1;
+ }
+ (*p)->size = lseek(ff->fd, 0, SEEK_CUR) - (*p)->offset;
+ (*p)++;
+ }
+ return ret;
+}
+
+static int perf_header__adds_write(struct perf_header *header,
+ struct evlist *evlist, int fd)
+{
+ int nr_sections;
+ struct feat_fd ff;
+ struct perf_file_section *feat_sec, *p;
+ int sec_size;
+ u64 sec_start;
+ int feat;
+ int err;
+
+ ff = (struct feat_fd){
+ .fd = fd,
+ .ph = header,
+ };
+
+ nr_sections = bitmap_weight(header->adds_features, HEADER_FEAT_BITS);
+ if (!nr_sections)
+ return 0;
+
+ feat_sec = p = calloc(nr_sections, sizeof(*feat_sec));
+ if (feat_sec == NULL)
+ return -ENOMEM;
+
+ sec_size = sizeof(*feat_sec) * nr_sections;
+
+ sec_start = header->feat_offset;
+ lseek(fd, sec_start + sec_size, SEEK_SET);
+
+ for_each_set_bit(feat, header->adds_features, HEADER_FEAT_BITS) {
+ if (do_write_feat(&ff, feat, &p, evlist))
+ perf_header__clear_feat(header, feat);
+ }
+
+ lseek(fd, sec_start, SEEK_SET);
+ /*
+ * may write more than needed due to dropped feature, but
+ * this is okay, reader will skip the missing entries
+ */
+ err = do_write(&ff, feat_sec, sec_size);
+ if (err < 0)
+ pr_debug("failed to write feature section\n");
+ free(feat_sec);
+ return err;
+}
+
+int perf_header__write_pipe(int fd)
+{
+ struct perf_pipe_file_header f_header;
+ struct feat_fd ff;
+ int err;
+
+ ff = (struct feat_fd){ .fd = fd };
+
+ f_header = (struct perf_pipe_file_header){
+ .magic = PERF_MAGIC,
+ .size = sizeof(f_header),
+ };
+
+ err = do_write(&ff, &f_header, sizeof(f_header));
+ if (err < 0) {
+ pr_debug("failed to write perf pipe header\n");
+ return err;
+ }
+
+ return 0;
+}
+
+int perf_session__write_header(struct perf_session *session,
+ struct evlist *evlist,
+ int fd, bool at_exit)
+{
+ struct perf_file_header f_header;
+ struct perf_file_attr f_attr;
+ struct perf_header *header = &session->header;
+ struct evsel *evsel;
+ struct feat_fd ff;
+ u64 attr_offset;
+ int err;
+
+ ff = (struct feat_fd){ .fd = fd};
+ lseek(fd, sizeof(f_header), SEEK_SET);
+
+ evlist__for_each_entry(session->evlist, evsel) {
+ evsel->id_offset = lseek(fd, 0, SEEK_CUR);
+ err = do_write(&ff, evsel->core.id, evsel->core.ids * sizeof(u64));
+ if (err < 0) {
+ pr_debug("failed to write perf header\n");
+ return err;
+ }
+ }
+
+ attr_offset = lseek(ff.fd, 0, SEEK_CUR);
+
+ evlist__for_each_entry(evlist, evsel) {
+ f_attr = (struct perf_file_attr){
+ .attr = evsel->core.attr,
+ .ids = {
+ .offset = evsel->id_offset,
+ .size = evsel->core.ids * sizeof(u64),
+ }
+ };
+ err = do_write(&ff, &f_attr, sizeof(f_attr));
+ if (err < 0) {
+ pr_debug("failed to write perf header attribute\n");
+ return err;
+ }
+ }
+
+ if (!header->data_offset)
+ header->data_offset = lseek(fd, 0, SEEK_CUR);
+ header->feat_offset = header->data_offset + header->data_size;
+
+ if (at_exit) {
+ err = perf_header__adds_write(header, evlist, fd);
+ if (err < 0)
+ return err;
+ }
+
+ f_header = (struct perf_file_header){
+ .magic = PERF_MAGIC,
+ .size = sizeof(f_header),
+ .attr_size = sizeof(f_attr),
+ .attrs = {
+ .offset = attr_offset,
+ .size = evlist->core.nr_entries * sizeof(f_attr),
+ },
+ .data = {
+ .offset = header->data_offset,
+ .size = header->data_size,
+ },
+ /* event_types is ignored, store zeros */
+ };
+
+ memcpy(&f_header.adds_features, &header->adds_features, sizeof(header->adds_features));
+
+ lseek(fd, 0, SEEK_SET);
+ err = do_write(&ff, &f_header, sizeof(f_header));
+ if (err < 0) {
+ pr_debug("failed to write perf header\n");
+ return err;
+ }
+ lseek(fd, header->data_offset + header->data_size, SEEK_SET);
+
+ return 0;
+}
+
+static int perf_header__getbuffer64(struct perf_header *header,
+ int fd, void *buf, size_t size)
+{
+ if (readn(fd, buf, size) <= 0)
+ return -1;
+
+ if (header->needs_swap)
+ mem_bswap_64(buf, size);
+
+ return 0;
+}
+
+int perf_header__process_sections(struct perf_header *header, int fd,
+ void *data,
+ int (*process)(struct perf_file_section *section,
+ struct perf_header *ph,
+ int feat, int fd, void *data))
+{
+ struct perf_file_section *feat_sec, *sec;
+ int nr_sections;
+ int sec_size;
+ int feat;
+ int err;
+
+ nr_sections = bitmap_weight(header->adds_features, HEADER_FEAT_BITS);
+ if (!nr_sections)
+ return 0;
+
+ feat_sec = sec = calloc(nr_sections, sizeof(*feat_sec));
+ if (!feat_sec)
+ return -1;
+
+ sec_size = sizeof(*feat_sec) * nr_sections;
+
+ lseek(fd, header->feat_offset, SEEK_SET);
+
+ err = perf_header__getbuffer64(header, fd, feat_sec, sec_size);
+ if (err < 0)
+ goto out_free;
+
+ for_each_set_bit(feat, header->adds_features, HEADER_LAST_FEATURE) {
+ err = process(sec++, header, feat, fd, data);
+ if (err < 0)
+ goto out_free;
+ }
+ err = 0;
+out_free:
+ free(feat_sec);
+ return err;
+}
+
+static const int attr_file_abi_sizes[] = {
+ [0] = PERF_ATTR_SIZE_VER0,
+ [1] = PERF_ATTR_SIZE_VER1,
+ [2] = PERF_ATTR_SIZE_VER2,
+ [3] = PERF_ATTR_SIZE_VER3,
+ [4] = PERF_ATTR_SIZE_VER4,
+ 0,
+};
+
+/*
+ * In the legacy file format, the magic number is not used to encode endianness.
+ * hdr_sz was used to encode endianness. But given that hdr_sz can vary based
+ * on ABI revisions, we need to try all combinations for all endianness to
+ * detect the endianness.
+ */
+static int try_all_file_abis(uint64_t hdr_sz, struct perf_header *ph)
+{
+ uint64_t ref_size, attr_size;
+ int i;
+
+ for (i = 0 ; attr_file_abi_sizes[i]; i++) {
+ ref_size = attr_file_abi_sizes[i]
+ + sizeof(struct perf_file_section);
+ if (hdr_sz != ref_size) {
+ attr_size = bswap_64(hdr_sz);
+ if (attr_size != ref_size)
+ continue;
+
+ ph->needs_swap = true;
+ }
+ pr_debug("ABI%d perf.data file detected, need_swap=%d\n",
+ i,
+ ph->needs_swap);
+ return 0;
+ }
+ /* could not determine endianness */
+ return -1;
+}
+
+#define PERF_PIPE_HDR_VER0 16
+
+static const size_t attr_pipe_abi_sizes[] = {
+ [0] = PERF_PIPE_HDR_VER0,
+ 0,
+};
+
+/*
+ * In the legacy pipe format, there is an implicit assumption that endiannesss
+ * between host recording the samples, and host parsing the samples is the
+ * same. This is not always the case given that the pipe output may always be
+ * redirected into a file and analyzed on a different machine with possibly a
+ * different endianness and perf_event ABI revsions in the perf tool itself.
+ */
+static int try_all_pipe_abis(uint64_t hdr_sz, struct perf_header *ph)
+{
+ u64 attr_size;
+ int i;
+
+ for (i = 0 ; attr_pipe_abi_sizes[i]; i++) {
+ if (hdr_sz != attr_pipe_abi_sizes[i]) {
+ attr_size = bswap_64(hdr_sz);
+ if (attr_size != hdr_sz)
+ continue;
+
+ ph->needs_swap = true;
+ }
+ pr_debug("Pipe ABI%d perf.data file detected\n", i);
+ return 0;
+ }
+ return -1;
+}
+
+bool is_perf_magic(u64 magic)
+{
+ if (!memcmp(&magic, __perf_magic1, sizeof(magic))
+ || magic == __perf_magic2
+ || magic == __perf_magic2_sw)
+ return true;
+
+ return false;
+}
+
+static int check_magic_endian(u64 magic, uint64_t hdr_sz,
+ bool is_pipe, struct perf_header *ph)
+{
+ int ret;
+
+ /* check for legacy format */
+ ret = memcmp(&magic, __perf_magic1, sizeof(magic));
+ if (ret == 0) {
+ ph->version = PERF_HEADER_VERSION_1;
+ pr_debug("legacy perf.data format\n");
+ if (is_pipe)
+ return try_all_pipe_abis(hdr_sz, ph);
+
+ return try_all_file_abis(hdr_sz, ph);
+ }
+ /*
+ * the new magic number serves two purposes:
+ * - unique number to identify actual perf.data files
+ * - encode endianness of file
+ */
+ ph->version = PERF_HEADER_VERSION_2;
+
+ /* check magic number with one endianness */
+ if (magic == __perf_magic2)
+ return 0;
+
+ /* check magic number with opposite endianness */
+ if (magic != __perf_magic2_sw)
+ return -1;
+
+ ph->needs_swap = true;
+
+ return 0;
+}
+
+int perf_file_header__read(struct perf_file_header *header,
+ struct perf_header *ph, int fd)
+{
+ ssize_t ret;
+
+ lseek(fd, 0, SEEK_SET);
+
+ ret = readn(fd, header, sizeof(*header));
+ if (ret <= 0)
+ return -1;
+
+ if (check_magic_endian(header->magic,
+ header->attr_size, false, ph) < 0) {
+ pr_debug("magic/endian check failed\n");
+ return -1;
+ }
+
+ if (ph->needs_swap) {
+ mem_bswap_64(header, offsetof(struct perf_file_header,
+ adds_features));
+ }
+
+ if (header->size != sizeof(*header)) {
+ /* Support the previous format */
+ if (header->size == offsetof(typeof(*header), adds_features))
+ bitmap_zero(header->adds_features, HEADER_FEAT_BITS);
+ else
+ return -1;
+ } else if (ph->needs_swap) {
+ /*
+ * feature bitmap is declared as an array of unsigned longs --
+ * not good since its size can differ between the host that
+ * generated the data file and the host analyzing the file.
+ *
+ * We need to handle endianness, but we don't know the size of
+ * the unsigned long where the file was generated. Take a best
+ * guess at determining it: try 64-bit swap first (ie., file
+ * created on a 64-bit host), and check if the hostname feature
+ * bit is set (this feature bit is forced on as of fbe96f2).
+ * If the bit is not, undo the 64-bit swap and try a 32-bit
+ * swap. If the hostname bit is still not set (e.g., older data
+ * file), punt and fallback to the original behavior --
+ * clearing all feature bits and setting buildid.
+ */
+ mem_bswap_64(&header->adds_features,
+ BITS_TO_U64(HEADER_FEAT_BITS));
+
+ if (!test_bit(HEADER_HOSTNAME, header->adds_features)) {
+ /* unswap as u64 */
+ mem_bswap_64(&header->adds_features,
+ BITS_TO_U64(HEADER_FEAT_BITS));
+
+ /* unswap as u32 */
+ mem_bswap_32(&header->adds_features,
+ BITS_TO_U32(HEADER_FEAT_BITS));
+ }
+
+ if (!test_bit(HEADER_HOSTNAME, header->adds_features)) {
+ bitmap_zero(header->adds_features, HEADER_FEAT_BITS);
+ set_bit(HEADER_BUILD_ID, header->adds_features);
+ }
+ }
+
+ memcpy(&ph->adds_features, &header->adds_features,
+ sizeof(ph->adds_features));
+
+ ph->data_offset = header->data.offset;
+ ph->data_size = header->data.size;
+ ph->feat_offset = header->data.offset + header->data.size;
+ return 0;
+}
+
+static int perf_file_section__process(struct perf_file_section *section,
+ struct perf_header *ph,
+ int feat, int fd, void *data)
+{
+ struct feat_fd fdd = {
+ .fd = fd,
+ .ph = ph,
+ .size = section->size,
+ .offset = section->offset,
+ };
+
+ if (lseek(fd, section->offset, SEEK_SET) == (off_t)-1) {
+ pr_debug("Failed to lseek to %" PRIu64 " offset for feature "
+ "%d, continuing...\n", section->offset, feat);
+ return 0;
+ }
+
+ if (feat >= HEADER_LAST_FEATURE) {
+ pr_debug("unknown feature %d, continuing...\n", feat);
+ return 0;
+ }
+
+ if (!feat_ops[feat].process)
+ return 0;
+
+ return feat_ops[feat].process(&fdd, data);
+}
+
+static int perf_file_header__read_pipe(struct perf_pipe_file_header *header,
+ struct perf_header *ph, int fd,
+ bool repipe)
+{
+ struct feat_fd ff = {
+ .fd = STDOUT_FILENO,
+ .ph = ph,
+ };
+ ssize_t ret;
+
+ ret = readn(fd, header, sizeof(*header));
+ if (ret <= 0)
+ return -1;
+
+ if (check_magic_endian(header->magic, header->size, true, ph) < 0) {
+ pr_debug("endian/magic failed\n");
+ return -1;
+ }
+
+ if (ph->needs_swap)
+ header->size = bswap_64(header->size);
+
+ if (repipe && do_write(&ff, header, sizeof(*header)) < 0)
+ return -1;
+
+ return 0;
+}
+
+static int perf_header__read_pipe(struct perf_session *session)
+{
+ struct perf_header *header = &session->header;
+ struct perf_pipe_file_header f_header;
+
+ if (perf_file_header__read_pipe(&f_header, header,
+ perf_data__fd(session->data),
+ session->repipe) < 0) {
+ pr_debug("incompatible file format\n");
+ return -EINVAL;
+ }
+
+ return f_header.size == sizeof(f_header) ? 0 : -1;
+}
+
+static int read_attr(int fd, struct perf_header *ph,
+ struct perf_file_attr *f_attr)
+{
+ struct perf_event_attr *attr = &f_attr->attr;
+ size_t sz, left;
+ size_t our_sz = sizeof(f_attr->attr);
+ ssize_t ret;
+
+ memset(f_attr, 0, sizeof(*f_attr));
+
+ /* read minimal guaranteed structure */
+ ret = readn(fd, attr, PERF_ATTR_SIZE_VER0);
+ if (ret <= 0) {
+ pr_debug("cannot read %d bytes of header attr\n",
+ PERF_ATTR_SIZE_VER0);
+ return -1;
+ }
+
+ /* on file perf_event_attr size */
+ sz = attr->size;
+
+ if (ph->needs_swap)
+ sz = bswap_32(sz);
+
+ if (sz == 0) {
+ /* assume ABI0 */
+ sz = PERF_ATTR_SIZE_VER0;
+ } else if (sz > our_sz) {
+ pr_debug("file uses a more recent and unsupported ABI"
+ " (%zu bytes extra)\n", sz - our_sz);
+ return -1;
+ }
+ /* what we have not yet read and that we know about */
+ left = sz - PERF_ATTR_SIZE_VER0;
+ if (left) {
+ void *ptr = attr;
+ ptr += PERF_ATTR_SIZE_VER0;
+
+ ret = readn(fd, ptr, left);
+ }
+ /* read perf_file_section, ids are read in caller */
+ ret = readn(fd, &f_attr->ids, sizeof(f_attr->ids));
+
+ return ret <= 0 ? -1 : 0;
+}
+
+static int perf_evsel__prepare_tracepoint_event(struct evsel *evsel,
+ struct tep_handle *pevent)
+{
+ struct tep_event *event;
+ char bf[128];
+
+ /* already prepared */
+ if (evsel->tp_format)
+ return 0;
+
+ if (pevent == NULL) {
+ pr_debug("broken or missing trace data\n");
+ return -1;
+ }
+
+ event = tep_find_event(pevent, evsel->core.attr.config);
+ if (event == NULL) {
+ pr_debug("cannot find event format for %d\n", (int)evsel->core.attr.config);
+ return -1;
+ }
+
+ if (!evsel->name) {
+ snprintf(bf, sizeof(bf), "%s:%s", event->system, event->name);
+ evsel->name = strdup(bf);
+ if (evsel->name == NULL)
+ return -1;
+ }
+
+ evsel->tp_format = event;
+ return 0;
+}
+
+static int perf_evlist__prepare_tracepoint_events(struct evlist *evlist,
+ struct tep_handle *pevent)
+{
+ struct evsel *pos;
+
+ evlist__for_each_entry(evlist, pos) {
+ if (pos->core.attr.type == PERF_TYPE_TRACEPOINT &&
+ perf_evsel__prepare_tracepoint_event(pos, pevent))
+ return -1;
+ }
+
+ return 0;
+}
+
+int perf_session__read_header(struct perf_session *session)
+{
+ struct perf_data *data = session->data;
+ struct perf_header *header = &session->header;
+ struct perf_file_header f_header;
+ struct perf_file_attr f_attr;
+ u64 f_id;
+ int nr_attrs, nr_ids, i, j, err;
+ int fd = perf_data__fd(data);
+
+ session->evlist = evlist__new();
+ if (session->evlist == NULL)
+ return -ENOMEM;
+
+ session->evlist->env = &header->env;
+ session->machines.host.env = &header->env;
+
+ /*
+ * We can read 'pipe' data event from regular file,
+ * check for the pipe header regardless of source.
+ */
+ err = perf_header__read_pipe(session);
+ if (!err || (err && perf_data__is_pipe(data))) {
+ data->is_pipe = true;
+ return err;
+ }
+
+ if (perf_file_header__read(&f_header, header, fd) < 0)
+ return -EINVAL;
+
+ /*
+ * Sanity check that perf.data was written cleanly; data size is
+ * initialized to 0 and updated only if the on_exit function is run.
+ * If data size is still 0 then the file contains only partial
+ * information. Just warn user and process it as much as it can.
+ */
+ if (f_header.data.size == 0) {
+ pr_warning("WARNING: The %s file's data size field is 0 which is unexpected.\n"
+ "Was the 'perf record' command properly terminated?\n",
+ data->file.path);
+ }
+
+ if (f_header.attr_size == 0) {
+ pr_err("ERROR: The %s file's attr size field is 0 which is unexpected.\n"
+ "Was the 'perf record' command properly terminated?\n",
+ data->file.path);
+ return -EINVAL;
+ }
+
+ nr_attrs = f_header.attrs.size / f_header.attr_size;
+ lseek(fd, f_header.attrs.offset, SEEK_SET);
+
+ for (i = 0; i < nr_attrs; i++) {
+ struct evsel *evsel;
+ off_t tmp;
+
+ if (read_attr(fd, header, &f_attr) < 0)
+ goto out_errno;
+
+ if (header->needs_swap) {
+ f_attr.ids.size = bswap_64(f_attr.ids.size);
+ f_attr.ids.offset = bswap_64(f_attr.ids.offset);
+ perf_event__attr_swap(&f_attr.attr);
+ }
+
+ tmp = lseek(fd, 0, SEEK_CUR);
+ evsel = evsel__new(&f_attr.attr);
+
+ if (evsel == NULL)
+ goto out_delete_evlist;
+
+ evsel->needs_swap = header->needs_swap;
+ /*
+ * Do it before so that if perf_evsel__alloc_id fails, this
+ * entry gets purged too at evlist__delete().
+ */
+ evlist__add(session->evlist, evsel);
+
+ nr_ids = f_attr.ids.size / sizeof(u64);
+ /*
+ * We don't have the cpu and thread maps on the header, so
+ * for allocating the perf_sample_id table we fake 1 cpu and
+ * hattr->ids threads.
+ */
+ if (perf_evsel__alloc_id(&evsel->core, 1, nr_ids))
+ goto out_delete_evlist;
+
+ lseek(fd, f_attr.ids.offset, SEEK_SET);
+
+ for (j = 0; j < nr_ids; j++) {
+ if (perf_header__getbuffer64(header, fd, &f_id, sizeof(f_id)))
+ goto out_errno;
+
+ perf_evlist__id_add(&session->evlist->core, &evsel->core, 0, j, f_id);
+ }
+
+ lseek(fd, tmp, SEEK_SET);
+ }
+
+ perf_header__process_sections(header, fd, &session->tevent,
+ perf_file_section__process);
+
+ if (perf_evlist__prepare_tracepoint_events(session->evlist,
+ session->tevent.pevent))
+ goto out_delete_evlist;
+
+ return 0;
+out_errno:
+ return -errno;
+
+out_delete_evlist:
+ evlist__delete(session->evlist);
+ session->evlist = NULL;
+ return -ENOMEM;
+}
+
+int perf_event__process_feature(struct perf_session *session,
+ union perf_event *event)
+{
+ struct perf_tool *tool = session->tool;
+ struct feat_fd ff = { .fd = 0 };
+ struct perf_record_header_feature *fe = (struct perf_record_header_feature *)event;
+ int type = fe->header.type;
+ u64 feat = fe->feat_id;
+
+ if (type < 0 || type >= PERF_RECORD_HEADER_MAX) {
+ pr_warning("invalid record type %d in pipe-mode\n", type);
+ return 0;
+ }
+ if (feat == HEADER_RESERVED || feat >= HEADER_LAST_FEATURE) {
+ pr_warning("invalid record type %d in pipe-mode\n", type);
+ return -1;
+ }
+
+ if (!feat_ops[feat].process)
+ return 0;
+
+ ff.buf = (void *)fe->data;
+ ff.size = event->header.size - sizeof(*fe);
+ ff.ph = &session->header;
+
+ if (feat_ops[feat].process(&ff, NULL))
+ return -1;
+
+ if (!feat_ops[feat].print || !tool->show_feat_hdr)
+ return 0;
+
+ if (!feat_ops[feat].full_only ||
+ tool->show_feat_hdr >= SHOW_FEAT_HEADER_FULL_INFO) {
+ feat_ops[feat].print(&ff, stdout);
+ } else {
+ fprintf(stdout, "# %s info available, use -I to display\n",
+ feat_ops[feat].name);
+ }
+
+ return 0;
+}
+
+size_t perf_event__fprintf_event_update(union perf_event *event, FILE *fp)
+{
+ struct perf_record_event_update *ev = &event->event_update;
+ struct perf_record_event_update_scale *ev_scale;
+ struct perf_record_event_update_cpus *ev_cpus;
+ struct perf_cpu_map *map;
+ size_t ret;
+
+ ret = fprintf(fp, "\n... id: %" PRI_lu64 "\n", ev->id);
+
+ switch (ev->type) {
+ case PERF_EVENT_UPDATE__SCALE:
+ ev_scale = (struct perf_record_event_update_scale *)ev->data;
+ ret += fprintf(fp, "... scale: %f\n", ev_scale->scale);
+ break;
+ case PERF_EVENT_UPDATE__UNIT:
+ ret += fprintf(fp, "... unit: %s\n", ev->data);
+ break;
+ case PERF_EVENT_UPDATE__NAME:
+ ret += fprintf(fp, "... name: %s\n", ev->data);
+ break;
+ case PERF_EVENT_UPDATE__CPUS:
+ ev_cpus = (struct perf_record_event_update_cpus *)ev->data;
+ ret += fprintf(fp, "... ");
+
+ map = cpu_map__new_data(&ev_cpus->cpus);
+ if (map)
+ ret += cpu_map__fprintf(map, fp);
+ else
+ ret += fprintf(fp, "failed to get cpus\n");
+ break;
+ default:
+ ret += fprintf(fp, "... unknown type\n");
+ break;
+ }
+
+ return ret;
+}
+
+int perf_event__process_attr(struct perf_tool *tool __maybe_unused,
+ union perf_event *event,
+ struct evlist **pevlist)
+{
+ u32 i, n_ids;
+ u64 *ids;
+ struct evsel *evsel;
+ struct evlist *evlist = *pevlist;
+
+ if (evlist == NULL) {
+ *pevlist = evlist = evlist__new();
+ if (evlist == NULL)
+ return -ENOMEM;
+ }
+
+ evsel = evsel__new(&event->attr.attr);
+ if (evsel == NULL)
+ return -ENOMEM;
+
+ evlist__add(evlist, evsel);
+
+ n_ids = event->header.size - sizeof(event->header) - event->attr.attr.size;
+ n_ids = n_ids / sizeof(u64);
+ /*
+ * We don't have the cpu and thread maps on the header, so
+ * for allocating the perf_sample_id table we fake 1 cpu and
+ * hattr->ids threads.
+ */
+ if (perf_evsel__alloc_id(&evsel->core, 1, n_ids))
+ return -ENOMEM;
+
+ ids = (void *)&event->attr.attr + event->attr.attr.size;
+ for (i = 0; i < n_ids; i++) {
+ perf_evlist__id_add(&evlist->core, &evsel->core, 0, i, ids[i]);
+ }
+
+ return 0;
+}
+
+int perf_event__process_event_update(struct perf_tool *tool __maybe_unused,
+ union perf_event *event,
+ struct evlist **pevlist)
+{
+ struct perf_record_event_update *ev = &event->event_update;
+ struct perf_record_event_update_scale *ev_scale;
+ struct perf_record_event_update_cpus *ev_cpus;
+ struct evlist *evlist;
+ struct evsel *evsel;
+ struct perf_cpu_map *map;
+
+ if (!pevlist || *pevlist == NULL)
+ return -EINVAL;
+
+ evlist = *pevlist;
+
+ evsel = perf_evlist__id2evsel(evlist, ev->id);
+ if (evsel == NULL)
+ return -EINVAL;
+
+ switch (ev->type) {
+ case PERF_EVENT_UPDATE__UNIT:
+ evsel->unit = strdup(ev->data);
+ break;
+ case PERF_EVENT_UPDATE__NAME:
+ evsel->name = strdup(ev->data);
+ break;
+ case PERF_EVENT_UPDATE__SCALE:
+ ev_scale = (struct perf_record_event_update_scale *)ev->data;
+ evsel->scale = ev_scale->scale;
+ break;
+ case PERF_EVENT_UPDATE__CPUS:
+ ev_cpus = (struct perf_record_event_update_cpus *)ev->data;
+
+ map = cpu_map__new_data(&ev_cpus->cpus);
+ if (map)
+ evsel->core.own_cpus = map;
+ else
+ pr_err("failed to get event_update cpus\n");
+ default:
+ break;
+ }
+
+ return 0;
+}
+
+int perf_event__process_tracing_data(struct perf_session *session,
+ union perf_event *event)
+{
+ ssize_t size_read, padding, size = event->tracing_data.size;
+ int fd = perf_data__fd(session->data);
+ char buf[BUFSIZ];
+
+ /*
+ * The pipe fd is already in proper place and in any case
+ * we can't move it, and we'd screw the case where we read
+ * 'pipe' data from regular file. The trace_report reads
+ * data from 'fd' so we need to set it directly behind the
+ * event, where the tracing data starts.
+ */
+ if (!perf_data__is_pipe(session->data)) {
+ off_t offset = lseek(fd, 0, SEEK_CUR);
+
+ /* setup for reading amidst mmap */
+ lseek(fd, offset + sizeof(struct perf_record_header_tracing_data),
+ SEEK_SET);
+ }
+
+ size_read = trace_report(fd, &session->tevent,
+ session->repipe);
+ padding = PERF_ALIGN(size_read, sizeof(u64)) - size_read;
+
+ if (readn(fd, buf, padding) < 0) {
+ pr_err("%s: reading input file", __func__);
+ return -1;
+ }
+ if (session->repipe) {
+ int retw = write(STDOUT_FILENO, buf, padding);
+ if (retw <= 0 || retw != padding) {
+ pr_err("%s: repiping tracing data padding", __func__);
+ return -1;
+ }
+ }
+
+ if (size_read + padding != size) {
+ pr_err("%s: tracing data size mismatch", __func__);
+ return -1;
+ }
+
+ perf_evlist__prepare_tracepoint_events(session->evlist,
+ session->tevent.pevent);
+
+ return size_read + padding;
+}
+
+int perf_event__process_build_id(struct perf_session *session,
+ union perf_event *event)
+{
+ __event_process_build_id(&event->build_id,
+ event->build_id.filename,
+ session);
+ return 0;
+}