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-rw-r--r--tools/perf/util/header.c2781
1 files changed, 2781 insertions, 0 deletions
diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c
new file mode 100644
index 000000000..918fd8ae2
--- /dev/null
+++ b/tools/perf/util/header.c
@@ -0,0 +1,2781 @@
+#include "util.h"
+#include <sys/types.h>
+#include <byteswap.h>
+#include <unistd.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <linux/list.h>
+#include <linux/kernel.h>
+#include <linux/bitops.h>
+#include <sys/utsname.h>
+
+#include "evlist.h"
+#include "evsel.h"
+#include "header.h"
+#include "../perf.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"
+
+static u32 header_argc;
+static const char **header_argv;
+
+/*
+ * 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
+
+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(int fd, const void *buf, size_t size)
+{
+ while (size) {
+ int ret = write(fd, buf, size);
+
+ if (ret < 0)
+ return -errno;
+
+ size -= ret;
+ buf += ret;
+ }
+
+ return 0;
+}
+
+int write_padded(int fd, const void *bf, size_t count, size_t count_aligned)
+{
+ static const char zero_buf[NAME_ALIGN];
+ int err = do_write(fd, bf, count);
+
+ if (!err)
+ err = do_write(fd, zero_buf, count_aligned - count);
+
+ return err;
+}
+
+static int do_write_string(int fd, 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(fd, &len, sizeof(len));
+ if (ret < 0)
+ return ret;
+
+ return write_padded(fd, str, olen, len);
+}
+
+static char *do_read_string(int fd, struct perf_header *ph)
+{
+ ssize_t sz, ret;
+ u32 len;
+ char *buf;
+
+ sz = readn(fd, &len, sizeof(len));
+ if (sz < (ssize_t)sizeof(len))
+ return NULL;
+
+ if (ph->needs_swap)
+ len = bswap_32(len);
+
+ buf = malloc(len);
+ if (!buf)
+ return NULL;
+
+ ret = readn(fd, buf, len);
+ if (ret == (ssize_t)len) {
+ /*
+ * strings are padded by zeroes
+ * thus the actual strlen of buf
+ * may be less than len
+ */
+ return buf;
+ }
+
+ free(buf);
+ return NULL;
+}
+
+int
+perf_header__set_cmdline(int argc, const char **argv)
+{
+ int i;
+
+ /*
+ * If header_argv has already been set, do not override it.
+ * This allows a command to set the cmdline, parse args and
+ * then call another builtin function that implements a
+ * command -- e.g, cmd_kvm calling cmd_record.
+ */
+ if (header_argv)
+ return 0;
+
+ header_argc = (u32)argc;
+
+ /* do not include NULL termination */
+ header_argv = calloc(argc, sizeof(char *));
+ if (!header_argv)
+ return -ENOMEM;
+
+ /*
+ * must copy argv contents because it gets moved
+ * around during option parsing
+ */
+ for (i = 0; i < argc ; i++)
+ header_argv[i] = argv[i];
+
+ return 0;
+}
+
+static int write_tracing_data(int fd, struct perf_header *h __maybe_unused,
+ struct perf_evlist *evlist)
+{
+ return read_tracing_data(fd, &evlist->entries);
+}
+
+
+static int write_build_id(int fd, struct perf_header *h,
+ struct perf_evlist *evlist __maybe_unused)
+{
+ struct perf_session *session;
+ int err;
+
+ session = container_of(h, struct perf_session, header);
+
+ if (!perf_session__read_build_ids(session, true))
+ return -1;
+
+ err = perf_session__write_buildid_table(session, fd);
+ 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(int fd, struct perf_header *h __maybe_unused,
+ struct perf_evlist *evlist __maybe_unused)
+{
+ struct utsname uts;
+ int ret;
+
+ ret = uname(&uts);
+ if (ret < 0)
+ return -1;
+
+ return do_write_string(fd, uts.nodename);
+}
+
+static int write_osrelease(int fd, struct perf_header *h __maybe_unused,
+ struct perf_evlist *evlist __maybe_unused)
+{
+ struct utsname uts;
+ int ret;
+
+ ret = uname(&uts);
+ if (ret < 0)
+ return -1;
+
+ return do_write_string(fd, uts.release);
+}
+
+static int write_arch(int fd, struct perf_header *h __maybe_unused,
+ struct perf_evlist *evlist __maybe_unused)
+{
+ struct utsname uts;
+ int ret;
+
+ ret = uname(&uts);
+ if (ret < 0)
+ return -1;
+
+ return do_write_string(fd, uts.machine);
+}
+
+static int write_version(int fd, struct perf_header *h __maybe_unused,
+ struct perf_evlist *evlist __maybe_unused)
+{
+ return do_write_string(fd, perf_version_string);
+}
+
+static int __write_cpudesc(int fd, 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 = r;
+ *p = ' ';
+ while (*q && isspace(*q))
+ q++;
+ if (q != (p+1))
+ while ((*r++ = *q++));
+ }
+ p++;
+ }
+ ret = do_write_string(fd, s);
+done:
+ free(buf);
+ fclose(file);
+ return ret;
+}
+
+static int write_cpudesc(int fd, struct perf_header *h __maybe_unused,
+ struct perf_evlist *evlist __maybe_unused)
+{
+#ifndef CPUINFO_PROC
+#define CPUINFO_PROC {"model name", }
+#endif
+ const char *cpuinfo_procs[] = CPUINFO_PROC;
+ unsigned int i;
+
+ for (i = 0; i < ARRAY_SIZE(cpuinfo_procs); i++) {
+ int ret;
+ ret = __write_cpudesc(fd, cpuinfo_procs[i]);
+ if (ret >= 0)
+ return ret;
+ }
+ return -1;
+}
+
+
+static int write_nrcpus(int fd, struct perf_header *h __maybe_unused,
+ struct perf_evlist *evlist __maybe_unused)
+{
+ long nr;
+ u32 nrc, nra;
+ int ret;
+
+ nr = sysconf(_SC_NPROCESSORS_CONF);
+ if (nr < 0)
+ return -1;
+
+ nrc = (u32)(nr & UINT_MAX);
+
+ nr = sysconf(_SC_NPROCESSORS_ONLN);
+ if (nr < 0)
+ return -1;
+
+ nra = (u32)(nr & UINT_MAX);
+
+ ret = do_write(fd, &nrc, sizeof(nrc));
+ if (ret < 0)
+ return ret;
+
+ return do_write(fd, &nra, sizeof(nra));
+}
+
+static int write_event_desc(int fd, struct perf_header *h __maybe_unused,
+ struct perf_evlist *evlist)
+{
+ struct perf_evsel *evsel;
+ u32 nre, nri, sz;
+ int ret;
+
+ nre = evlist->nr_entries;
+
+ /*
+ * write number of events
+ */
+ ret = do_write(fd, &nre, sizeof(nre));
+ if (ret < 0)
+ return ret;
+
+ /*
+ * size of perf_event_attr struct
+ */
+ sz = (u32)sizeof(evsel->attr);
+ ret = do_write(fd, &sz, sizeof(sz));
+ if (ret < 0)
+ return ret;
+
+ evlist__for_each(evlist, evsel) {
+ ret = do_write(fd, &evsel->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->ids;
+ ret = do_write(fd, &nri, sizeof(nri));
+ if (ret < 0)
+ return ret;
+
+ /*
+ * write event string as passed on cmdline
+ */
+ ret = do_write_string(fd, perf_evsel__name(evsel));
+ if (ret < 0)
+ return ret;
+ /*
+ * write unique ids for this event
+ */
+ ret = do_write(fd, evsel->id, evsel->ids * sizeof(u64));
+ if (ret < 0)
+ return ret;
+ }
+ return 0;
+}
+
+static int write_cmdline(int fd, struct perf_header *h __maybe_unused,
+ struct perf_evlist *evlist __maybe_unused)
+{
+ char buf[MAXPATHLEN];
+ char proc[32];
+ u32 i, n;
+ int ret;
+
+ /*
+ * actual atual path to perf binary
+ */
+ sprintf(proc, "/proc/%d/exe", getpid());
+ ret = readlink(proc, buf, sizeof(buf));
+ if (ret <= 0)
+ return -1;
+
+ /* readlink() does not add null termination */
+ buf[ret] = '\0';
+
+ /* account for binary path */
+ n = header_argc + 1;
+
+ ret = do_write(fd, &n, sizeof(n));
+ if (ret < 0)
+ return ret;
+
+ ret = do_write_string(fd, buf);
+ if (ret < 0)
+ return ret;
+
+ for (i = 0 ; i < header_argc; i++) {
+ ret = do_write_string(fd, header_argv[i]);
+ if (ret < 0)
+ return ret;
+ }
+ return 0;
+}
+
+#define CORE_SIB_FMT \
+ "/sys/devices/system/cpu/cpu%d/topology/core_siblings_list"
+#define THRD_SIB_FMT \
+ "/sys/devices/system/cpu/cpu%d/topology/thread_siblings_list"
+
+struct cpu_topo {
+ u32 core_sib;
+ u32 thread_sib;
+ char **core_siblings;
+ char **thread_siblings;
+};
+
+static int build_cpu_topo(struct cpu_topo *tp, int cpu)
+{
+ FILE *fp;
+ char filename[MAXPATHLEN];
+ char *buf = NULL, *p;
+ size_t len = 0;
+ ssize_t sret;
+ u32 i = 0;
+ int ret = -1;
+
+ sprintf(filename, CORE_SIB_FMT, cpu);
+ fp = fopen(filename, "r");
+ if (!fp)
+ goto try_threads;
+
+ sret = getline(&buf, &len, fp);
+ fclose(fp);
+ if (sret <= 0)
+ goto try_threads;
+
+ p = strchr(buf, '\n');
+ if (p)
+ *p = '\0';
+
+ for (i = 0; i < tp->core_sib; i++) {
+ if (!strcmp(buf, tp->core_siblings[i]))
+ break;
+ }
+ if (i == tp->core_sib) {
+ tp->core_siblings[i] = buf;
+ tp->core_sib++;
+ buf = NULL;
+ len = 0;
+ }
+ ret = 0;
+
+try_threads:
+ sprintf(filename, THRD_SIB_FMT, cpu);
+ fp = fopen(filename, "r");
+ if (!fp)
+ goto done;
+
+ if (getline(&buf, &len, fp) <= 0)
+ goto done;
+
+ p = strchr(buf, '\n');
+ if (p)
+ *p = '\0';
+
+ for (i = 0; i < tp->thread_sib; i++) {
+ if (!strcmp(buf, tp->thread_siblings[i]))
+ break;
+ }
+ if (i == tp->thread_sib) {
+ tp->thread_siblings[i] = buf;
+ tp->thread_sib++;
+ buf = NULL;
+ }
+ ret = 0;
+done:
+ if(fp)
+ fclose(fp);
+ free(buf);
+ return ret;
+}
+
+static void free_cpu_topo(struct cpu_topo *tp)
+{
+ u32 i;
+
+ if (!tp)
+ return;
+
+ for (i = 0 ; i < tp->core_sib; i++)
+ zfree(&tp->core_siblings[i]);
+
+ for (i = 0 ; i < tp->thread_sib; i++)
+ zfree(&tp->thread_siblings[i]);
+
+ free(tp);
+}
+
+static struct cpu_topo *build_cpu_topology(void)
+{
+ struct cpu_topo *tp;
+ void *addr;
+ u32 nr, i;
+ size_t sz;
+ long ncpus;
+ int ret = -1;
+
+ ncpus = sysconf(_SC_NPROCESSORS_CONF);
+ if (ncpus < 0)
+ return NULL;
+
+ nr = (u32)(ncpus & UINT_MAX);
+
+ sz = nr * sizeof(char *);
+
+ addr = calloc(1, sizeof(*tp) + 2 * sz);
+ if (!addr)
+ return NULL;
+
+ tp = addr;
+
+ addr += sizeof(*tp);
+ tp->core_siblings = addr;
+ addr += sz;
+ tp->thread_siblings = addr;
+
+ for (i = 0; i < nr; i++) {
+ ret = build_cpu_topo(tp, i);
+ if (ret < 0)
+ break;
+ }
+ if (ret) {
+ free_cpu_topo(tp);
+ tp = NULL;
+ }
+ return tp;
+}
+
+static int write_cpu_topology(int fd, struct perf_header *h __maybe_unused,
+ struct perf_evlist *evlist __maybe_unused)
+{
+ struct cpu_topo *tp;
+ u32 i;
+ int ret;
+
+ tp = build_cpu_topology();
+ if (!tp)
+ return -1;
+
+ ret = do_write(fd, &tp->core_sib, sizeof(tp->core_sib));
+ if (ret < 0)
+ goto done;
+
+ for (i = 0; i < tp->core_sib; i++) {
+ ret = do_write_string(fd, tp->core_siblings[i]);
+ if (ret < 0)
+ goto done;
+ }
+ ret = do_write(fd, &tp->thread_sib, sizeof(tp->thread_sib));
+ if (ret < 0)
+ goto done;
+
+ for (i = 0; i < tp->thread_sib; i++) {
+ ret = do_write_string(fd, tp->thread_siblings[i]);
+ if (ret < 0)
+ break;
+ }
+done:
+ free_cpu_topo(tp);
+ return ret;
+}
+
+
+
+static int write_total_mem(int fd, struct perf_header *h __maybe_unused,
+ struct perf_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(fd, &mem, sizeof(mem));
+ } else
+ ret = -1;
+ free(buf);
+ fclose(fp);
+ return ret;
+}
+
+static int write_topo_node(int fd, int node)
+{
+ char str[MAXPATHLEN];
+ char field[32];
+ char *buf = NULL, *p;
+ size_t len = 0;
+ FILE *fp;
+ u64 mem_total, mem_free, mem;
+ int ret = -1;
+
+ sprintf(str, "/sys/devices/system/node/node%d/meminfo", node);
+ fp = fopen(str, "r");
+ if (!fp)
+ return -1;
+
+ while (getline(&buf, &len, fp) > 0) {
+ /* skip over invalid lines */
+ if (!strchr(buf, ':'))
+ continue;
+ if (sscanf(buf, "%*s %*d %31s %"PRIu64, field, &mem) != 2)
+ goto done;
+ if (!strcmp(field, "MemTotal:"))
+ mem_total = mem;
+ if (!strcmp(field, "MemFree:"))
+ mem_free = mem;
+ }
+
+ fclose(fp);
+ fp = NULL;
+
+ ret = do_write(fd, &mem_total, sizeof(u64));
+ if (ret)
+ goto done;
+
+ ret = do_write(fd, &mem_free, sizeof(u64));
+ if (ret)
+ goto done;
+
+ ret = -1;
+ sprintf(str, "/sys/devices/system/node/node%d/cpulist", node);
+
+ fp = fopen(str, "r");
+ if (!fp)
+ goto done;
+
+ if (getline(&buf, &len, fp) <= 0)
+ goto done;
+
+ p = strchr(buf, '\n');
+ if (p)
+ *p = '\0';
+
+ ret = do_write_string(fd, buf);
+done:
+ free(buf);
+ if (fp)
+ fclose(fp);
+ return ret;
+}
+
+static int write_numa_topology(int fd, struct perf_header *h __maybe_unused,
+ struct perf_evlist *evlist __maybe_unused)
+{
+ char *buf = NULL;
+ size_t len = 0;
+ FILE *fp;
+ struct cpu_map *node_map = NULL;
+ char *c;
+ u32 nr, i, j;
+ int ret = -1;
+
+ fp = fopen("/sys/devices/system/node/online", "r");
+ if (!fp)
+ return -1;
+
+ if (getline(&buf, &len, fp) <= 0)
+ goto done;
+
+ c = strchr(buf, '\n');
+ if (c)
+ *c = '\0';
+
+ node_map = cpu_map__new(buf);
+ if (!node_map)
+ goto done;
+
+ nr = (u32)node_map->nr;
+
+ ret = do_write(fd, &nr, sizeof(nr));
+ if (ret < 0)
+ goto done;
+
+ for (i = 0; i < nr; i++) {
+ j = (u32)node_map->map[i];
+ ret = do_write(fd, &j, sizeof(j));
+ if (ret < 0)
+ break;
+
+ ret = write_topo_node(fd, i);
+ if (ret < 0)
+ break;
+ }
+done:
+ free(buf);
+ fclose(fp);
+ free(node_map);
+ return ret;
+}
+
+/*
+ * File format:
+ *
+ * struct pmu_mappings {
+ * u32 pmu_num;
+ * struct pmu_map {
+ * u32 type;
+ * char name[];
+ * }[pmu_num];
+ * };
+ */
+
+static int write_pmu_mappings(int fd, struct perf_header *h __maybe_unused,
+ struct perf_evlist *evlist __maybe_unused)
+{
+ struct perf_pmu *pmu = NULL;
+ off_t offset = lseek(fd, 0, SEEK_CUR);
+ __u32 pmu_num = 0;
+ int ret;
+
+ /* write real pmu_num later */
+ ret = do_write(fd, &pmu_num, sizeof(pmu_num));
+ if (ret < 0)
+ return ret;
+
+ while ((pmu = perf_pmu__scan(pmu))) {
+ if (!pmu->name)
+ continue;
+ pmu_num++;
+
+ ret = do_write(fd, &pmu->type, sizeof(pmu->type));
+ if (ret < 0)
+ return ret;
+
+ ret = do_write_string(fd, pmu->name);
+ if (ret < 0)
+ return ret;
+ }
+
+ if (pwrite(fd, &pmu_num, sizeof(pmu_num), offset) != sizeof(pmu_num)) {
+ /* discard all */
+ lseek(fd, offset, SEEK_SET);
+ return -1;
+ }
+
+ 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(int fd, struct perf_header *h __maybe_unused,
+ struct perf_evlist *evlist)
+{
+ u32 nr_groups = evlist->nr_groups;
+ struct perf_evsel *evsel;
+ int ret;
+
+ ret = do_write(fd, &nr_groups, sizeof(nr_groups));
+ if (ret < 0)
+ return ret;
+
+ evlist__for_each(evlist, evsel) {
+ if (perf_evsel__is_group_leader(evsel) &&
+ evsel->nr_members > 1) {
+ const char *name = evsel->group_name ?: "{anon_group}";
+ u32 leader_idx = evsel->idx;
+ u32 nr_members = evsel->nr_members;
+
+ ret = do_write_string(fd, name);
+ if (ret < 0)
+ return ret;
+
+ ret = do_write(fd, &leader_idx, sizeof(leader_idx));
+ if (ret < 0)
+ return ret;
+
+ ret = do_write(fd, &nr_members, sizeof(nr_members));
+ if (ret < 0)
+ return ret;
+ }
+ }
+ return 0;
+}
+
+/*
+ * default get_cpuid(): nothing gets recorded
+ * actual implementation must be in arch/$(ARCH)/util/header.c
+ */
+int __attribute__ ((weak)) get_cpuid(char *buffer __maybe_unused,
+ size_t sz __maybe_unused)
+{
+ return -1;
+}
+
+static int write_cpuid(int fd, struct perf_header *h __maybe_unused,
+ struct perf_evlist *evlist __maybe_unused)
+{
+ char buffer[64];
+ int ret;
+
+ ret = get_cpuid(buffer, sizeof(buffer));
+ if (!ret)
+ goto write_it;
+
+ return -1;
+write_it:
+ return do_write_string(fd, buffer);
+}
+
+static int write_branch_stack(int fd __maybe_unused,
+ struct perf_header *h __maybe_unused,
+ struct perf_evlist *evlist __maybe_unused)
+{
+ return 0;
+}
+
+static void print_hostname(struct perf_header *ph, int fd __maybe_unused,
+ FILE *fp)
+{
+ fprintf(fp, "# hostname : %s\n", ph->env.hostname);
+}
+
+static void print_osrelease(struct perf_header *ph, int fd __maybe_unused,
+ FILE *fp)
+{
+ fprintf(fp, "# os release : %s\n", ph->env.os_release);
+}
+
+static void print_arch(struct perf_header *ph, int fd __maybe_unused, FILE *fp)
+{
+ fprintf(fp, "# arch : %s\n", ph->env.arch);
+}
+
+static void print_cpudesc(struct perf_header *ph, int fd __maybe_unused,
+ FILE *fp)
+{
+ fprintf(fp, "# cpudesc : %s\n", ph->env.cpu_desc);
+}
+
+static void print_nrcpus(struct perf_header *ph, int fd __maybe_unused,
+ FILE *fp)
+{
+ fprintf(fp, "# nrcpus online : %u\n", ph->env.nr_cpus_online);
+ fprintf(fp, "# nrcpus avail : %u\n", ph->env.nr_cpus_avail);
+}
+
+static void print_version(struct perf_header *ph, int fd __maybe_unused,
+ FILE *fp)
+{
+ fprintf(fp, "# perf version : %s\n", ph->env.version);
+}
+
+static void print_cmdline(struct perf_header *ph, int fd __maybe_unused,
+ FILE *fp)
+{
+ int nr, i;
+ char *str;
+
+ nr = ph->env.nr_cmdline;
+ str = ph->env.cmdline;
+
+ fprintf(fp, "# cmdline : ");
+
+ for (i = 0; i < nr; i++) {
+ fprintf(fp, "%s ", str);
+ str += strlen(str) + 1;
+ }
+ fputc('\n', fp);
+}
+
+static void print_cpu_topology(struct perf_header *ph, int fd __maybe_unused,
+ FILE *fp)
+{
+ 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 cores : %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;
+ }
+}
+
+static void free_event_desc(struct perf_evsel *events)
+{
+ struct perf_evsel *evsel;
+
+ if (!events)
+ return;
+
+ for (evsel = events; evsel->attr.size; evsel++) {
+ zfree(&evsel->name);
+ zfree(&evsel->id);
+ }
+
+ free(events);
+}
+
+static struct perf_evsel *
+read_event_desc(struct perf_header *ph, int fd)
+{
+ struct perf_evsel *evsel, *events = NULL;
+ u64 *id;
+ void *buf = NULL;
+ u32 nre, sz, nr, i, j;
+ ssize_t ret;
+ size_t msz;
+
+ /* number of events */
+ ret = readn(fd, &nre, sizeof(nre));
+ if (ret != (ssize_t)sizeof(nre))
+ goto error;
+
+ if (ph->needs_swap)
+ nre = bswap_32(nre);
+
+ ret = readn(fd, &sz, sizeof(sz));
+ if (ret != (ssize_t)sizeof(sz))
+ goto error;
+
+ if (ph->needs_swap)
+ sz = bswap_32(sz);
+
+ /* buffer to hold on file attr struct */
+ buf = malloc(sz);
+ if (!buf)
+ goto error;
+
+ /* the last event terminates with evsel->attr.size == 0: */
+ events = calloc(nre + 1, sizeof(*events));
+ if (!events)
+ goto error;
+
+ msz = sizeof(evsel->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.
+ */
+ ret = readn(fd, buf, sz);
+ if (ret != (ssize_t)sz)
+ goto error;
+
+ if (ph->needs_swap)
+ perf_event__attr_swap(buf);
+
+ memcpy(&evsel->attr, buf, msz);
+
+ ret = readn(fd, &nr, sizeof(nr));
+ if (ret != (ssize_t)sizeof(nr))
+ goto error;
+
+ if (ph->needs_swap) {
+ nr = bswap_32(nr);
+ evsel->needs_swap = true;
+ }
+
+ evsel->name = do_read_string(fd, ph);
+
+ if (!nr)
+ continue;
+
+ id = calloc(nr, sizeof(*id));
+ if (!id)
+ goto error;
+ evsel->ids = nr;
+ evsel->id = id;
+
+ for (j = 0 ; j < nr; j++) {
+ ret = readn(fd, id, sizeof(*id));
+ if (ret != (ssize_t)sizeof(*id))
+ goto error;
+ if (ph->needs_swap)
+ *id = bswap_64(*id);
+ id++;
+ }
+ }
+out:
+ free(buf);
+ return events;
+error:
+ if (events)
+ free_event_desc(events);
+ events = NULL;
+ goto out;
+}
+
+static int __desc_attr__fprintf(FILE *fp, const char *name, const char *val,
+ void *priv __attribute__((unused)))
+{
+ return fprintf(fp, ", %s = %s", name, val);
+}
+
+static void print_event_desc(struct perf_header *ph, int fd, FILE *fp)
+{
+ struct perf_evsel *evsel, *events = read_event_desc(ph, fd);
+ u32 j;
+ u64 *id;
+
+ if (!events) {
+ fprintf(fp, "# event desc: not available or unable to read\n");
+ return;
+ }
+
+ for (evsel = events; evsel->attr.size; evsel++) {
+ fprintf(fp, "# event : name = %s, ", evsel->name);
+
+ if (evsel->ids) {
+ fprintf(fp, ", id = {");
+ for (j = 0, id = evsel->id; j < evsel->ids; j++, id++) {
+ if (j)
+ fputc(',', fp);
+ fprintf(fp, " %"PRIu64, *id);
+ }
+ fprintf(fp, " }");
+ }
+
+ perf_event_attr__fprintf(fp, &evsel->attr, __desc_attr__fprintf, NULL);
+
+ fputc('\n', fp);
+ }
+
+ free_event_desc(events);
+}
+
+static void print_total_mem(struct perf_header *ph, int fd __maybe_unused,
+ FILE *fp)
+{
+ fprintf(fp, "# total memory : %Lu kB\n", ph->env.total_mem);
+}
+
+static void print_numa_topology(struct perf_header *ph, int fd __maybe_unused,
+ FILE *fp)
+{
+ u32 nr, c, i;
+ char *str, *tmp;
+ uint64_t mem_total, mem_free;
+
+ /* nr nodes */
+ nr = ph->env.nr_numa_nodes;
+ str = ph->env.numa_nodes;
+
+ for (i = 0; i < nr; i++) {
+ /* node number */
+ c = strtoul(str, &tmp, 0);
+ if (*tmp != ':')
+ goto error;
+
+ str = tmp + 1;
+ mem_total = strtoull(str, &tmp, 0);
+ if (*tmp != ':')
+ goto error;
+
+ str = tmp + 1;
+ mem_free = strtoull(str, &tmp, 0);
+ if (*tmp != ':')
+ goto error;
+
+ fprintf(fp, "# node%u meminfo : total = %"PRIu64" kB,"
+ " free = %"PRIu64" kB\n",
+ c, mem_total, mem_free);
+
+ str = tmp + 1;
+ fprintf(fp, "# node%u cpu list : %s\n", c, str);
+
+ str += strlen(str) + 1;
+ }
+ return;
+error:
+ fprintf(fp, "# numa topology : not available\n");
+}
+
+static void print_cpuid(struct perf_header *ph, int fd __maybe_unused, FILE *fp)
+{
+ fprintf(fp, "# cpuid : %s\n", ph->env.cpuid);
+}
+
+static void print_branch_stack(struct perf_header *ph __maybe_unused,
+ int fd __maybe_unused, FILE *fp)
+{
+ fprintf(fp, "# contains samples with branch stack\n");
+}
+
+static void print_pmu_mappings(struct perf_header *ph, int fd __maybe_unused,
+ FILE *fp)
+{
+ const char *delimiter = "# pmu mappings: ";
+ char *str, *tmp;
+ u32 pmu_num;
+ u32 type;
+
+ pmu_num = ph->env.nr_pmu_mappings;
+ if (!pmu_num) {
+ fprintf(fp, "# pmu mappings: not available\n");
+ return;
+ }
+
+ str = 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 perf_header *ph, int fd __maybe_unused,
+ FILE *fp)
+{
+ struct perf_session *session;
+ struct perf_evsel *evsel;
+ u32 nr = 0;
+
+ session = container_of(ph, struct perf_session, header);
+
+ evlist__for_each(session->evlist, evsel) {
+ if (perf_evsel__is_group_leader(evsel) &&
+ evsel->nr_members > 1) {
+ fprintf(fp, "# group: %s{%s", evsel->group_name ?: "",
+ perf_evsel__name(evsel));
+
+ nr = evsel->nr_members - 1;
+ } else if (nr) {
+ fprintf(fp, ",%s", perf_evsel__name(evsel));
+
+ if (--nr == 0)
+ fprintf(fp, "}\n");
+ }
+ }
+}
+
+static int __event_process_build_id(struct build_id_event *bev,
+ char *filename,
+ struct perf_session *session)
+{
+ int err = -1;
+ struct dsos *dsos;
+ struct machine *machine;
+ u16 misc;
+ struct dso *dso;
+ enum dso_kernel_type dso_type;
+
+ machine = perf_session__findnew_machine(session, bev->pid);
+ if (!machine)
+ goto out;
+
+ misc = bev->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
+
+ switch (misc) {
+ case PERF_RECORD_MISC_KERNEL:
+ dso_type = DSO_TYPE_KERNEL;
+ dsos = &machine->kernel_dsos;
+ break;
+ case PERF_RECORD_MISC_GUEST_KERNEL:
+ dso_type = DSO_TYPE_GUEST_KERNEL;
+ dsos = &machine->kernel_dsos;
+ break;
+ case PERF_RECORD_MISC_USER:
+ case PERF_RECORD_MISC_GUEST_USER:
+ dso_type = DSO_TYPE_USER;
+ dsos = &machine->user_dsos;
+ break;
+ default:
+ goto out;
+ }
+
+ dso = __dsos__findnew(dsos, filename);
+ if (dso != NULL) {
+ char sbuild_id[BUILD_ID_SIZE * 2 + 1];
+
+ dso__set_build_id(dso, &bev->build_id);
+
+ if (!is_kernel_module(filename))
+ dso->kernel = dso_type;
+
+ build_id__sprintf(dso->build_id, sizeof(dso->build_id),
+ sbuild_id);
+ pr_debug("build id event received for %s: %s\n",
+ dso->long_name, sbuild_id);
+ }
+
+ 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 build_id_event 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 build_id_event 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 build_id_event 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;
+}
+
+static int process_tracing_data(struct perf_file_section *section __maybe_unused,
+ struct perf_header *ph __maybe_unused,
+ int fd, void *data)
+{
+ ssize_t ret = trace_report(fd, data, false);
+ return ret < 0 ? -1 : 0;
+}
+
+static int process_build_id(struct perf_file_section *section,
+ struct perf_header *ph, int fd,
+ void *data __maybe_unused)
+{
+ if (perf_header__read_build_ids(ph, fd, section->offset, section->size))
+ pr_debug("Failed to read buildids, continuing...\n");
+ return 0;
+}
+
+static int process_hostname(struct perf_file_section *section __maybe_unused,
+ struct perf_header *ph, int fd,
+ void *data __maybe_unused)
+{
+ ph->env.hostname = do_read_string(fd, ph);
+ return ph->env.hostname ? 0 : -ENOMEM;
+}
+
+static int process_osrelease(struct perf_file_section *section __maybe_unused,
+ struct perf_header *ph, int fd,
+ void *data __maybe_unused)
+{
+ ph->env.os_release = do_read_string(fd, ph);
+ return ph->env.os_release ? 0 : -ENOMEM;
+}
+
+static int process_version(struct perf_file_section *section __maybe_unused,
+ struct perf_header *ph, int fd,
+ void *data __maybe_unused)
+{
+ ph->env.version = do_read_string(fd, ph);
+ return ph->env.version ? 0 : -ENOMEM;
+}
+
+static int process_arch(struct perf_file_section *section __maybe_unused,
+ struct perf_header *ph, int fd,
+ void *data __maybe_unused)
+{
+ ph->env.arch = do_read_string(fd, ph);
+ return ph->env.arch ? 0 : -ENOMEM;
+}
+
+static int process_nrcpus(struct perf_file_section *section __maybe_unused,
+ struct perf_header *ph, int fd,
+ void *data __maybe_unused)
+{
+ ssize_t ret;
+ u32 nr;
+
+ ret = readn(fd, &nr, sizeof(nr));
+ if (ret != sizeof(nr))
+ return -1;
+
+ if (ph->needs_swap)
+ nr = bswap_32(nr);
+
+ ph->env.nr_cpus_online = nr;
+
+ ret = readn(fd, &nr, sizeof(nr));
+ if (ret != sizeof(nr))
+ return -1;
+
+ if (ph->needs_swap)
+ nr = bswap_32(nr);
+
+ ph->env.nr_cpus_avail = nr;
+ return 0;
+}
+
+static int process_cpudesc(struct perf_file_section *section __maybe_unused,
+ struct perf_header *ph, int fd,
+ void *data __maybe_unused)
+{
+ ph->env.cpu_desc = do_read_string(fd, ph);
+ return ph->env.cpu_desc ? 0 : -ENOMEM;
+}
+
+static int process_cpuid(struct perf_file_section *section __maybe_unused,
+ struct perf_header *ph, int fd,
+ void *data __maybe_unused)
+{
+ ph->env.cpuid = do_read_string(fd, ph);
+ return ph->env.cpuid ? 0 : -ENOMEM;
+}
+
+static int process_total_mem(struct perf_file_section *section __maybe_unused,
+ struct perf_header *ph, int fd,
+ void *data __maybe_unused)
+{
+ uint64_t mem;
+ ssize_t ret;
+
+ ret = readn(fd, &mem, sizeof(mem));
+ if (ret != sizeof(mem))
+ return -1;
+
+ if (ph->needs_swap)
+ mem = bswap_64(mem);
+
+ ph->env.total_mem = mem;
+ return 0;
+}
+
+static struct perf_evsel *
+perf_evlist__find_by_index(struct perf_evlist *evlist, int idx)
+{
+ struct perf_evsel *evsel;
+
+ evlist__for_each(evlist, evsel) {
+ if (evsel->idx == idx)
+ return evsel;
+ }
+
+ return NULL;
+}
+
+static void
+perf_evlist__set_event_name(struct perf_evlist *evlist,
+ struct perf_evsel *event)
+{
+ struct perf_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 perf_file_section *section __maybe_unused,
+ struct perf_header *header, int fd,
+ void *data __maybe_unused)
+{
+ struct perf_session *session;
+ struct perf_evsel *evsel, *events = read_event_desc(header, fd);
+
+ if (!events)
+ return 0;
+
+ session = container_of(header, struct perf_session, header);
+ for (evsel = events; evsel->attr.size; evsel++)
+ perf_evlist__set_event_name(session->evlist, evsel);
+
+ free_event_desc(events);
+
+ return 0;
+}
+
+static int process_cmdline(struct perf_file_section *section __maybe_unused,
+ struct perf_header *ph, int fd,
+ void *data __maybe_unused)
+{
+ ssize_t ret;
+ char *str;
+ u32 nr, i;
+ struct strbuf sb;
+
+ ret = readn(fd, &nr, sizeof(nr));
+ if (ret != sizeof(nr))
+ return -1;
+
+ if (ph->needs_swap)
+ nr = bswap_32(nr);
+
+ ph->env.nr_cmdline = nr;
+ strbuf_init(&sb, 128);
+
+ for (i = 0; i < nr; i++) {
+ str = do_read_string(fd, ph);
+ if (!str)
+ goto error;
+
+ /* include a NULL character at the end */
+ strbuf_add(&sb, str, strlen(str) + 1);
+ free(str);
+ }
+ ph->env.cmdline = strbuf_detach(&sb, NULL);
+ return 0;
+
+error:
+ strbuf_release(&sb);
+ return -1;
+}
+
+static int process_cpu_topology(struct perf_file_section *section __maybe_unused,
+ struct perf_header *ph, int fd,
+ void *data __maybe_unused)
+{
+ ssize_t ret;
+ u32 nr, i;
+ char *str;
+ struct strbuf sb;
+
+ ret = readn(fd, &nr, sizeof(nr));
+ if (ret != sizeof(nr))
+ return -1;
+
+ if (ph->needs_swap)
+ nr = bswap_32(nr);
+
+ ph->env.nr_sibling_cores = nr;
+ strbuf_init(&sb, 128);
+
+ for (i = 0; i < nr; i++) {
+ str = do_read_string(fd, ph);
+ if (!str)
+ goto error;
+
+ /* include a NULL character at the end */
+ strbuf_add(&sb, str, strlen(str) + 1);
+ free(str);
+ }
+ ph->env.sibling_cores = strbuf_detach(&sb, NULL);
+
+ ret = readn(fd, &nr, sizeof(nr));
+ if (ret != sizeof(nr))
+ return -1;
+
+ if (ph->needs_swap)
+ nr = bswap_32(nr);
+
+ ph->env.nr_sibling_threads = nr;
+
+ for (i = 0; i < nr; i++) {
+ str = do_read_string(fd, ph);
+ if (!str)
+ goto error;
+
+ /* include a NULL character at the end */
+ strbuf_add(&sb, str, strlen(str) + 1);
+ free(str);
+ }
+ ph->env.sibling_threads = strbuf_detach(&sb, NULL);
+ return 0;
+
+error:
+ strbuf_release(&sb);
+ return -1;
+}
+
+static int process_numa_topology(struct perf_file_section *section __maybe_unused,
+ struct perf_header *ph, int fd,
+ void *data __maybe_unused)
+{
+ ssize_t ret;
+ u32 nr, node, i;
+ char *str;
+ uint64_t mem_total, mem_free;
+ struct strbuf sb;
+
+ /* nr nodes */
+ ret = readn(fd, &nr, sizeof(nr));
+ if (ret != sizeof(nr))
+ goto error;
+
+ if (ph->needs_swap)
+ nr = bswap_32(nr);
+
+ ph->env.nr_numa_nodes = nr;
+ strbuf_init(&sb, 256);
+
+ for (i = 0; i < nr; i++) {
+ /* node number */
+ ret = readn(fd, &node, sizeof(node));
+ if (ret != sizeof(node))
+ goto error;
+
+ ret = readn(fd, &mem_total, sizeof(u64));
+ if (ret != sizeof(u64))
+ goto error;
+
+ ret = readn(fd, &mem_free, sizeof(u64));
+ if (ret != sizeof(u64))
+ goto error;
+
+ if (ph->needs_swap) {
+ node = bswap_32(node);
+ mem_total = bswap_64(mem_total);
+ mem_free = bswap_64(mem_free);
+ }
+
+ strbuf_addf(&sb, "%u:%"PRIu64":%"PRIu64":",
+ node, mem_total, mem_free);
+
+ str = do_read_string(fd, ph);
+ if (!str)
+ goto error;
+
+ /* include a NULL character at the end */
+ strbuf_add(&sb, str, strlen(str) + 1);
+ free(str);
+ }
+ ph->env.numa_nodes = strbuf_detach(&sb, NULL);
+ return 0;
+
+error:
+ strbuf_release(&sb);
+ return -1;
+}
+
+static int process_pmu_mappings(struct perf_file_section *section __maybe_unused,
+ struct perf_header *ph, int fd,
+ void *data __maybe_unused)
+{
+ ssize_t ret;
+ char *name;
+ u32 pmu_num;
+ u32 type;
+ struct strbuf sb;
+
+ ret = readn(fd, &pmu_num, sizeof(pmu_num));
+ if (ret != sizeof(pmu_num))
+ return -1;
+
+ if (ph->needs_swap)
+ pmu_num = bswap_32(pmu_num);
+
+ if (!pmu_num) {
+ pr_debug("pmu mappings not available\n");
+ return 0;
+ }
+
+ ph->env.nr_pmu_mappings = pmu_num;
+ strbuf_init(&sb, 128);
+
+ while (pmu_num) {
+ if (readn(fd, &type, sizeof(type)) != sizeof(type))
+ goto error;
+ if (ph->needs_swap)
+ type = bswap_32(type);
+
+ name = do_read_string(fd, ph);
+ if (!name)
+ goto error;
+
+ strbuf_addf(&sb, "%u:%s", type, name);
+ /* include a NULL character at the end */
+ strbuf_add(&sb, "", 1);
+
+ free(name);
+ pmu_num--;
+ }
+ ph->env.pmu_mappings = strbuf_detach(&sb, NULL);
+ return 0;
+
+error:
+ strbuf_release(&sb);
+ return -1;
+}
+
+static int process_group_desc(struct perf_file_section *section __maybe_unused,
+ struct perf_header *ph, int fd,
+ void *data __maybe_unused)
+{
+ size_t ret = -1;
+ u32 i, nr, nr_groups;
+ struct perf_session *session;
+ struct perf_evsel *evsel, *leader = NULL;
+ struct group_desc {
+ char *name;
+ u32 leader_idx;
+ u32 nr_members;
+ } *desc;
+
+ if (readn(fd, &nr_groups, sizeof(nr_groups)) != sizeof(nr_groups))
+ return -1;
+
+ if (ph->needs_swap)
+ nr_groups = bswap_32(nr_groups);
+
+ 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(fd, ph);
+ if (!desc[i].name)
+ goto out_free;
+
+ if (readn(fd, &desc[i].leader_idx, sizeof(u32)) != sizeof(u32))
+ goto out_free;
+
+ if (readn(fd, &desc[i].nr_members, sizeof(u32)) != sizeof(u32))
+ goto out_free;
+
+ if (ph->needs_swap) {
+ desc[i].leader_idx = bswap_32(desc[i].leader_idx);
+ desc[i].nr_members = bswap_32(desc[i].nr_members);
+ }
+ }
+
+ /*
+ * Rebuild group relationship based on the group_desc
+ */
+ session = container_of(ph, struct perf_session, header);
+ session->evlist->nr_groups = nr_groups;
+
+ i = nr = 0;
+ evlist__for_each(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->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->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;
+}
+
+struct feature_ops {
+ int (*write)(int fd, struct perf_header *h, struct perf_evlist *evlist);
+ void (*print)(struct perf_header *h, int fd, FILE *fp);
+ int (*process)(struct perf_file_section *section,
+ struct perf_header *h, int fd, void *data);
+ const char *name;
+ bool full_only;
+};
+
+#define FEAT_OPA(n, func) \
+ [n] = { .name = #n, .write = write_##func, .print = print_##func }
+#define FEAT_OPP(n, func) \
+ [n] = { .name = #n, .write = write_##func, .print = print_##func, \
+ .process = process_##func }
+#define FEAT_OPF(n, func) \
+ [n] = { .name = #n, .write = write_##func, .print = print_##func, \
+ .process = process_##func, .full_only = true }
+
+/* feature_ops not implemented: */
+#define print_tracing_data NULL
+#define print_build_id NULL
+
+static const struct feature_ops feat_ops[HEADER_LAST_FEATURE] = {
+ FEAT_OPP(HEADER_TRACING_DATA, tracing_data),
+ FEAT_OPP(HEADER_BUILD_ID, build_id),
+ FEAT_OPP(HEADER_HOSTNAME, hostname),
+ FEAT_OPP(HEADER_OSRELEASE, osrelease),
+ FEAT_OPP(HEADER_VERSION, version),
+ FEAT_OPP(HEADER_ARCH, arch),
+ FEAT_OPP(HEADER_NRCPUS, nrcpus),
+ FEAT_OPP(HEADER_CPUDESC, cpudesc),
+ FEAT_OPP(HEADER_CPUID, cpuid),
+ FEAT_OPP(HEADER_TOTAL_MEM, total_mem),
+ FEAT_OPP(HEADER_EVENT_DESC, event_desc),
+ FEAT_OPP(HEADER_CMDLINE, cmdline),
+ FEAT_OPF(HEADER_CPU_TOPOLOGY, cpu_topology),
+ FEAT_OPF(HEADER_NUMA_TOPOLOGY, numa_topology),
+ FEAT_OPA(HEADER_BRANCH_STACK, branch_stack),
+ FEAT_OPP(HEADER_PMU_MAPPINGS, pmu_mappings),
+ FEAT_OPP(HEADER_GROUP_DESC, group_desc),
+};
+
+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;
+
+ 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;
+
+ if (!feat_ops[feat].full_only || hd->full)
+ feat_ops[feat].print(ph, fd, 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_file__fd(session->file);
+ hd.fp = fp;
+ hd.full = full;
+
+ perf_header__process_sections(header, fd, &hd,
+ perf_file_section__fprintf_info);
+ return 0;
+}
+
+static int do_write_feat(int fd, struct perf_header *h, int type,
+ struct perf_file_section **p,
+ struct perf_evlist *evlist)
+{
+ int err;
+ int ret = 0;
+
+ if (perf_header__has_feat(h, type)) {
+ if (!feat_ops[type].write)
+ return -1;
+
+ (*p)->offset = lseek(fd, 0, SEEK_CUR);
+
+ err = feat_ops[type].write(fd, h, evlist);
+ if (err < 0) {
+ pr_debug("failed to write feature %d\n", type);
+
+ /* undo anything written */
+ lseek(fd, (*p)->offset, SEEK_SET);
+
+ return -1;
+ }
+ (*p)->size = lseek(fd, 0, SEEK_CUR) - (*p)->offset;
+ (*p)++;
+ }
+ return ret;
+}
+
+static int perf_header__adds_write(struct perf_header *header,
+ struct perf_evlist *evlist, int fd)
+{
+ int nr_sections;
+ struct perf_file_section *feat_sec, *p;
+ int sec_size;
+ u64 sec_start;
+ int feat;
+ int err;
+
+ 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(fd, header, 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 mising entries
+ */
+ err = do_write(fd, 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;
+ int err;
+
+ f_header = (struct perf_pipe_file_header){
+ .magic = PERF_MAGIC,
+ .size = sizeof(f_header),
+ };
+
+ err = do_write(fd, &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 perf_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 perf_evsel *evsel;
+ u64 attr_offset;
+ int err;
+
+ lseek(fd, sizeof(f_header), SEEK_SET);
+
+ evlist__for_each(session->evlist, evsel) {
+ evsel->id_offset = lseek(fd, 0, SEEK_CUR);
+ err = do_write(fd, evsel->id, evsel->ids * sizeof(u64));
+ if (err < 0) {
+ pr_debug("failed to write perf header\n");
+ return err;
+ }
+ }
+
+ attr_offset = lseek(fd, 0, SEEK_CUR);
+
+ evlist__for_each(evlist, evsel) {
+ f_attr = (struct perf_file_attr){
+ .attr = evsel->attr,
+ .ids = {
+ .offset = evsel->id_offset,
+ .size = evsel->ids * sizeof(u64),
+ }
+ };
+ err = do_write(fd, &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->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(fd, &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)
+{
+ 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(section, ph, fd, data);
+}
+
+static int perf_file_header__read_pipe(struct perf_pipe_file_header *header,
+ struct perf_header *ph, int fd,
+ bool repipe)
+{
+ 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(STDOUT_FILENO, 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_file__fd(session->file),
+ session->repipe) < 0) {
+ pr_debug("incompatible file format\n");
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+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 perf_evsel *evsel,
+ struct pevent *pevent)
+{
+ struct event_format *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 = pevent_find_event(pevent, evsel->attr.config);
+ if (event == NULL)
+ 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 perf_evlist *evlist,
+ struct pevent *pevent)
+{
+ struct perf_evsel *pos;
+
+ evlist__for_each(evlist, pos) {
+ if (pos->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_file *file = session->file;
+ 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;
+ int fd = perf_data_file__fd(file);
+
+ session->evlist = perf_evlist__new();
+ if (session->evlist == NULL)
+ return -ENOMEM;
+
+ if (perf_data_file__is_pipe(file))
+ return perf_header__read_pipe(session);
+
+ 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",
+ file->path);
+ }
+
+ 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 perf_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 = perf_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 perf_evlist__delete().
+ */
+ perf_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, 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, evsel, 0, j, f_id);
+ }
+
+ lseek(fd, tmp, SEEK_SET);
+ }
+
+ symbol_conf.nr_events = nr_attrs;
+
+ 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:
+ perf_evlist__delete(session->evlist);
+ session->evlist = NULL;
+ return -ENOMEM;
+}
+
+int perf_event__synthesize_attr(struct perf_tool *tool,
+ struct perf_event_attr *attr, u32 ids, u64 *id,
+ perf_event__handler_t process)
+{
+ union perf_event *ev;
+ size_t size;
+ int err;
+
+ size = sizeof(struct perf_event_attr);
+ size = PERF_ALIGN(size, sizeof(u64));
+ size += sizeof(struct perf_event_header);
+ size += ids * sizeof(u64);
+
+ ev = malloc(size);
+
+ if (ev == NULL)
+ return -ENOMEM;
+
+ ev->attr.attr = *attr;
+ memcpy(ev->attr.id, id, ids * sizeof(u64));
+
+ ev->attr.header.type = PERF_RECORD_HEADER_ATTR;
+ ev->attr.header.size = (u16)size;
+
+ if (ev->attr.header.size == size)
+ err = process(tool, ev, NULL, NULL);
+ else
+ err = -E2BIG;
+
+ free(ev);
+
+ return err;
+}
+
+int perf_event__synthesize_attrs(struct perf_tool *tool,
+ struct perf_session *session,
+ perf_event__handler_t process)
+{
+ struct perf_evsel *evsel;
+ int err = 0;
+
+ evlist__for_each(session->evlist, evsel) {
+ err = perf_event__synthesize_attr(tool, &evsel->attr, evsel->ids,
+ evsel->id, process);
+ if (err) {
+ pr_debug("failed to create perf header attribute\n");
+ return err;
+ }
+ }
+
+ return err;
+}
+
+int perf_event__process_attr(struct perf_tool *tool __maybe_unused,
+ union perf_event *event,
+ struct perf_evlist **pevlist)
+{
+ u32 i, ids, n_ids;
+ struct perf_evsel *evsel;
+ struct perf_evlist *evlist = *pevlist;
+
+ if (evlist == NULL) {
+ *pevlist = evlist = perf_evlist__new();
+ if (evlist == NULL)
+ return -ENOMEM;
+ }
+
+ evsel = perf_evsel__new(&event->attr.attr);
+ if (evsel == NULL)
+ return -ENOMEM;
+
+ perf_evlist__add(evlist, evsel);
+
+ ids = event->header.size;
+ ids -= (void *)&event->attr.id - (void *)event;
+ n_ids = 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, 1, n_ids))
+ return -ENOMEM;
+
+ for (i = 0; i < n_ids; i++) {
+ perf_evlist__id_add(evlist, evsel, 0, i, event->attr.id[i]);
+ }
+
+ symbol_conf.nr_events = evlist->nr_entries;
+
+ return 0;
+}
+
+int perf_event__synthesize_tracing_data(struct perf_tool *tool, int fd,
+ struct perf_evlist *evlist,
+ perf_event__handler_t process)
+{
+ union perf_event ev;
+ struct tracing_data *tdata;
+ ssize_t size = 0, aligned_size = 0, padding;
+ int err __maybe_unused = 0;
+
+ /*
+ * We are going to store the size of the data followed
+ * by the data contents. Since the fd descriptor is a pipe,
+ * we cannot seek back to store the size of the data once
+ * we know it. Instead we:
+ *
+ * - write the tracing data to the temp file
+ * - get/write the data size to pipe
+ * - write the tracing data from the temp file
+ * to the pipe
+ */
+ tdata = tracing_data_get(&evlist->entries, fd, true);
+ if (!tdata)
+ return -1;
+
+ memset(&ev, 0, sizeof(ev));
+
+ ev.tracing_data.header.type = PERF_RECORD_HEADER_TRACING_DATA;
+ size = tdata->size;
+ aligned_size = PERF_ALIGN(size, sizeof(u64));
+ padding = aligned_size - size;
+ ev.tracing_data.header.size = sizeof(ev.tracing_data);
+ ev.tracing_data.size = aligned_size;
+
+ process(tool, &ev, NULL, NULL);
+
+ /*
+ * The put function will copy all the tracing data
+ * stored in temp file to the pipe.
+ */
+ tracing_data_put(tdata);
+
+ write_padded(fd, NULL, 0, padding);
+
+ return aligned_size;
+}
+
+int perf_event__process_tracing_data(struct perf_tool *tool __maybe_unused,
+ union perf_event *event,
+ struct perf_session *session)
+{
+ ssize_t size_read, padding, size = event->tracing_data.size;
+ int fd = perf_data_file__fd(session->file);
+ off_t offset = lseek(fd, 0, SEEK_CUR);
+ char buf[BUFSIZ];
+
+ /* setup for reading amidst mmap */
+ lseek(fd, offset + sizeof(struct tracing_data_event),
+ 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__synthesize_build_id(struct perf_tool *tool,
+ struct dso *pos, u16 misc,
+ perf_event__handler_t process,
+ struct machine *machine)
+{
+ union perf_event ev;
+ size_t len;
+ int err = 0;
+
+ if (!pos->hit)
+ return err;
+
+ memset(&ev, 0, sizeof(ev));
+
+ len = pos->long_name_len + 1;
+ len = PERF_ALIGN(len, NAME_ALIGN);
+ memcpy(&ev.build_id.build_id, pos->build_id, sizeof(pos->build_id));
+ ev.build_id.header.type = PERF_RECORD_HEADER_BUILD_ID;
+ ev.build_id.header.misc = misc;
+ ev.build_id.pid = machine->pid;
+ ev.build_id.header.size = sizeof(ev.build_id) + len;
+ memcpy(&ev.build_id.filename, pos->long_name, pos->long_name_len);
+
+ err = process(tool, &ev, NULL, machine);
+
+ return err;
+}
+
+int perf_event__process_build_id(struct perf_tool *tool __maybe_unused,
+ union perf_event *event,
+ struct perf_session *session)
+{
+ __event_process_build_id(&event->build_id,
+ event->build_id.filename,
+ session);
+ return 0;
+}
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-11-08 02:06:57 +0000