linux_dsm_epyc7002/tools/perf/util/header.c
Jiri Olsa 57b5de4639 perf report: Support forced leader feature in pipe mode
Stephane reported a problem with forced leader in pipe mode, where
report does not force the group output. The reason is that we don't
force the leader in pipe mode.

This patch adds HEADER_LAST_FEATURE mark to have a point where we have
all events and features received, and force the group if requested.

  $ perf record --group -e '{cycles, instructions}' -o - kill | perf report -i - --group

  SNIP

  #         Overhead  Command  Shared Object     Symbol
  # ................  .......  ................  .......................
  #
      28.36%   0.00%  kill     libc-2.25.so      [.] __unregister_atfork
      26.32%   0.00%  kill     libc-2.25.so      [.] _dl_addr
      26.10%   0.00%  kill     ld-2.25.so        [.] _dl_relocate_object
      17.32%   0.00%  kill     ld-2.25.so        [.] __tunables_init
       1.70%   0.01%  kill     [unknown]         [k] 0xffffffffafa01a40
       0.20%   0.00%  kill     ld-2.25.so        [.] _start
       0.00%  48.77%  kill     ld-2.25.so        [.] do_lookup_x
       0.00%  42.97%  kill     libc-2.25.so      [.] _IO_getline
       0.00%   6.35%  kill     ld-2.25.so        [.] strcmp
       0.00%   1.71%  kill     ld-2.25.so        [.] _dl_sysdep_start
       0.00%   0.19%  kill     ld-2.25.so        [.] _dl_start

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Tested-by: Stephane Eranian <eranian@google.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20180314092205.23291-2-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2018-03-16 13:56:59 -03:00

3918 lines
82 KiB
C

// SPDX-License-Identifier: GPL-2.0
#include <errno.h>
#include <inttypes.h>
#include "util.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/stringify.h>
#include <sys/stat.h>
#include <sys/utsname.h>
#include <linux/time64.h>
#include <dirent.h>
#include "evlist.h"
#include "evsel.h"
#include "header.h"
#include "memswap.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"
#include <api/fs/fs.h>
#include "asm/bug.h"
#include "tool.h"
#include "time-utils.h"
#include "units.h"
#include "sane_ctype.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;
};
struct feat_fd {
struct perf_header *ph;
int fd;
void *buf; /* Either buf != NULL or fd >= 0 */
ssize_t offset;
size_t size;
struct perf_evsel *events;
};
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;
bitmap_zero(set, size);
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 perf_evlist *evlist)
{
if (WARN(ff->buf, "Error: calling %s in pipe-mode.\n", __func__))
return -1;
return read_tracing_data(ff->fd, &evlist->entries);
}
static int write_build_id(struct feat_fd *ff,
struct perf_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 perf_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 perf_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 perf_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 perf_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 = r;
*p = ' ';
while (*q && isspace(*q))
q++;
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 perf_evlist *evlist __maybe_unused)
{
const char *cpuinfo_procs[] = 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 perf_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 perf_evlist *evlist)
{
struct perf_evsel *evsel;
u32 nre, nri, sz;
int ret;
nre = evlist->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->attr);
ret = do_write(ff, &sz, sizeof(sz));
if (ret < 0)
return ret;
evlist__for_each_entry(evlist, evsel) {
ret = do_write(ff, &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(ff, &nri, sizeof(nri));
if (ret < 0)
return ret;
/*
* write event string as passed on cmdline
*/
ret = do_write_string(ff, perf_evsel__name(evsel));
if (ret < 0)
return ret;
/*
* write unique ids for this event
*/
ret = do_write(ff, evsel->id, evsel->ids * sizeof(u64));
if (ret < 0)
return ret;
}
return 0;
}
static int write_cmdline(struct feat_fd *ff,
struct perf_evlist *evlist __maybe_unused)
{
char buf[MAXPATHLEN];
u32 n;
int i, ret;
/* actual path to perf binary */
ret = readlink("/proc/self/exe", buf, sizeof(buf) - 1);
if (ret <= 0)
return -1;
/* readlink() does not add null termination */
buf[ret] = '\0';
/* 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;
}
#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 cpu_nr;
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 = NULL;
void *addr;
u32 nr, i;
size_t sz;
long ncpus;
int ret = -1;
struct cpu_map *map;
ncpus = cpu__max_present_cpu();
/* build online CPU map */
map = cpu_map__new(NULL);
if (map == NULL) {
pr_debug("failed to get system cpumap\n");
return NULL;
}
nr = (u32)(ncpus & UINT_MAX);
sz = nr * sizeof(char *);
addr = calloc(1, sizeof(*tp) + 2 * sz);
if (!addr)
goto out_free;
tp = addr;
tp->cpu_nr = nr;
addr += sizeof(*tp);
tp->core_siblings = addr;
addr += sz;
tp->thread_siblings = addr;
for (i = 0; i < nr; i++) {
if (!cpu_map__has(map, i))
continue;
ret = build_cpu_topo(tp, i);
if (ret < 0)
break;
}
out_free:
cpu_map__put(map);
if (ret) {
free_cpu_topo(tp);
tp = NULL;
}
return tp;
}
static int write_cpu_topology(struct feat_fd *ff,
struct perf_evlist *evlist __maybe_unused)
{
struct cpu_topo *tp;
u32 i;
int ret, j;
tp = build_cpu_topology();
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;
}
done:
free_cpu_topo(tp);
return ret;
}
static int write_total_mem(struct feat_fd *ff,
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(ff, &mem, sizeof(mem));
} else
ret = -1;
free(buf);
fclose(fp);
return ret;
}
static int write_topo_node(struct feat_fd *ff, 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(ff, &mem_total, sizeof(u64));
if (ret)
goto done;
ret = do_write(ff, &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(ff, buf);
done:
free(buf);
if (fp)
fclose(fp);
return ret;
}
static int write_numa_topology(struct feat_fd *ff,
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(ff, &nr, sizeof(nr));
if (ret < 0)
goto done;
for (i = 0; i < nr; i++) {
j = (u32)node_map->map[i];
ret = do_write(ff, &j, sizeof(j));
if (ret < 0)
break;
ret = write_topo_node(ff, i);
if (ret < 0)
break;
}
done:
free(buf);
fclose(fp);
cpu_map__put(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(struct feat_fd *ff,
struct perf_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 perf_evlist *evlist)
{
u32 nr_groups = evlist->nr_groups;
struct perf_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 (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(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;
}
/*
* 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 -1;
}
static int write_cpuid(struct feat_fd *ff,
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(ff, buffer);
}
static int write_branch_stack(struct feat_fd *ff __maybe_unused,
struct perf_evlist *evlist __maybe_unused)
{
return 0;
}
static int write_auxtrace(struct feat_fd *ff,
struct perf_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 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 = rtrim(cache->type);
scnprintf(file, PATH_MAX, "%s/size", path);
if (sysfs__read_str(file, &cache->size, &len)) {
free(cache->type);
return -1;
}
cache->size[len] = 0;
cache->size = rtrim(cache->size);
scnprintf(file, PATH_MAX, "%s/shared_cpu_list", path);
if (sysfs__read_str(file, &cache->map, &len)) {
free(cache->map);
free(cache->type);
return -1;
}
cache->map[len] = 0;
cache->map = rtrim(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);
}
static int build_caches(struct cpu_cache_level caches[], u32 size, u32 *cntp)
{
u32 i, cnt = 0;
long ncpus;
u32 nr, cpu;
u16 level;
ncpus = sysconf(_SC_NPROCESSORS_CONF);
if (ncpus < 0)
return -1;
nr = (u32)(ncpus & UINT_MAX);
for (cpu = 0; cpu < nr; cpu++) {
for (level = 0; level < 10; 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);
if (WARN_ONCE(cnt == size, "way too many cpu caches.."))
goto out;
}
}
out:
*cntp = cnt;
return 0;
}
#define MAX_CACHES 2000
static int write_cache(struct feat_fd *ff,
struct perf_evlist *evlist __maybe_unused)
{
struct cpu_cache_level caches[MAX_CACHES];
u32 cnt = 0, i, version = 1;
int ret;
ret = build_caches(caches, MAX_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 perf_evlist *evlist __maybe_unused)
{
return 0;
}
static int write_sample_time(struct feat_fd *ff,
struct perf_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;
}
bitmap_zero(n->set, size);
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_warning("failed: can't open node sysfs data\n");
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"))
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 perf_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 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++)
fprintf(fp, "%s ", ff->ph->env.cmdline_argv[i]);
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 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;
}
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 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 feat_fd *ff)
{
struct perf_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->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.
*/
if (__do_read(ff, buf, sz))
goto error;
if (ff->ph->needs_swap)
perf_event__attr_swap(buf);
memcpy(&evsel->attr, buf, msz);
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->ids = nr;
evsel->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 perf_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->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);
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_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 perf_evsel *evsel;
u32 nr = 0;
session = container_of(ff->ph, struct perf_session, header);
evlist__for_each_entry(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 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 build_id_event *bev,
char *filename,
struct perf_session *session)
{
int err = -1;
struct machine *machine;
u16 cpumode;
struct dso *dso;
enum dso_kernel_type dso_type;
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_type = DSO_TYPE_KERNEL;
break;
case PERF_RECORD_MISC_GUEST_KERNEL:
dso_type = DSO_TYPE_GUEST_KERNEL;
break;
case PERF_RECORD_MISC_USER:
case PERF_RECORD_MISC_GUEST_USER:
dso_type = DSO_TYPE_USER;
break;
default:
goto out;
}
dso = machine__findnew_dso(machine, filename);
if (dso != NULL) {
char sbuild_id[SBUILD_ID_SIZE];
dso__set_build_id(dso, &bev->build_id);
if (dso_type != DSO_TYPE_USER) {
struct kmod_path m = { .name = NULL, };
if (!kmod_path__parse_name(&m, filename) && m.kmod)
dso__set_module_info(dso, &m, machine);
else
dso->kernel = dso_type;
free(m.name);
}
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);
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 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;
}
/* 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 perf_evsel *
perf_evlist__find_by_index(struct perf_evlist *evlist, int idx)
{
struct perf_evsel *evsel;
evlist__for_each_entry(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 feat_fd *ff, void *data __maybe_unused)
{
struct perf_session *session;
struct perf_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->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;
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;
}
for (i = 0; i < (u32)cpu_nr; i++) {
if (do_read_u32(ff, &nr))
goto free_cpu;
ph->env.cpu[i].core_id = nr;
if (do_read_u32(ff, &nr))
goto free_cpu;
if (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;
}
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 = 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 perf_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->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;
}
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;
}
struct feature_ops {
int (*write)(struct feat_fd *ff, struct perf_evlist *evlist);
void (*print)(struct feat_fd *ff, FILE *fp);
int (*process)(struct feat_fd *ff, void *data);
const char *name;
bool full_only;
bool synthesize;
};
#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
static const struct 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_OPN(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),
};
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;
int ret, bit;
hd.fp = fp;
hd.full = full;
ret = fstat(fd, &st);
if (ret == -1)
return -1;
fprintf(fp, "# captured on : %s", ctime(&st.st_ctime));
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 perf_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 perf_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 mising 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 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;
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->id, evsel->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->attr,
.ids = {
.offset = evsel->id_offset,
.size = evsel->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->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 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) {
pr_debug("cannot find event format for %d\n", (int)evsel->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 perf_evlist *evlist,
struct pevent *pevent)
{
struct perf_evsel *pos;
evlist__for_each_entry(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 *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;
int fd = perf_data__fd(data);
session->evlist = perf_evlist__new();
if (session->evlist == NULL)
return -ENOMEM;
session->evlist->env = &header->env;
session->machines.host.env = &header->env;
if (perf_data__is_pipe(data))
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",
data->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_features(struct perf_tool *tool,
struct perf_session *session,
struct perf_evlist *evlist,
perf_event__handler_t process)
{
struct perf_header *header = &session->header;
struct feat_fd ff;
struct feature_event *fe;
size_t sz, sz_hdr;
int feat, ret;
sz_hdr = sizeof(fe->header);
sz = sizeof(union perf_event);
/* get a nice alignment */
sz = PERF_ALIGN(sz, page_size);
memset(&ff, 0, sizeof(ff));
ff.buf = malloc(sz);
if (!ff.buf)
return -ENOMEM;
ff.size = sz - sz_hdr;
for_each_set_bit(feat, header->adds_features, HEADER_FEAT_BITS) {
if (!feat_ops[feat].synthesize) {
pr_debug("No record header feature for header :%d\n", feat);
continue;
}
ff.offset = sizeof(*fe);
ret = feat_ops[feat].write(&ff, evlist);
if (ret || ff.offset <= (ssize_t)sizeof(*fe)) {
pr_debug("Error writing feature\n");
continue;
}
/* ff.buf may have changed due to realloc in do_write() */
fe = ff.buf;
memset(fe, 0, sizeof(*fe));
fe->feat_id = feat;
fe->header.type = PERF_RECORD_HEADER_FEATURE;
fe->header.size = ff.offset;
ret = process(tool, ff.buf, NULL, NULL);
if (ret) {
free(ff.buf);
return ret;
}
}
/* Send HEADER_LAST_FEATURE mark. */
fe = ff.buf;
fe->feat_id = HEADER_LAST_FEATURE;
fe->header.type = PERF_RECORD_HEADER_FEATURE;
fe->header.size = sizeof(*fe);
ret = process(tool, ff.buf, NULL, NULL);
free(ff.buf);
return ret;
}
int perf_event__process_feature(struct perf_tool *tool,
union perf_event *event,
struct perf_session *session __maybe_unused)
{
struct feat_fd ff = { .fd = 0 };
struct feature_event *fe = (struct feature_event *)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(event->header);
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;
}
static struct event_update_event *
event_update_event__new(size_t size, u64 type, u64 id)
{
struct event_update_event *ev;
size += sizeof(*ev);
size = PERF_ALIGN(size, sizeof(u64));
ev = zalloc(size);
if (ev) {
ev->header.type = PERF_RECORD_EVENT_UPDATE;
ev->header.size = (u16)size;
ev->type = type;
ev->id = id;
}
return ev;
}
int
perf_event__synthesize_event_update_unit(struct perf_tool *tool,
struct perf_evsel *evsel,
perf_event__handler_t process)
{
struct event_update_event *ev;
size_t size = strlen(evsel->unit);
int err;
ev = event_update_event__new(size + 1, PERF_EVENT_UPDATE__UNIT, evsel->id[0]);
if (ev == NULL)
return -ENOMEM;
strncpy(ev->data, evsel->unit, size);
err = process(tool, (union perf_event *)ev, NULL, NULL);
free(ev);
return err;
}
int
perf_event__synthesize_event_update_scale(struct perf_tool *tool,
struct perf_evsel *evsel,
perf_event__handler_t process)
{
struct event_update_event *ev;
struct event_update_event_scale *ev_data;
int err;
ev = event_update_event__new(sizeof(*ev_data), PERF_EVENT_UPDATE__SCALE, evsel->id[0]);
if (ev == NULL)
return -ENOMEM;
ev_data = (struct event_update_event_scale *) ev->data;
ev_data->scale = evsel->scale;
err = process(tool, (union perf_event*) ev, NULL, NULL);
free(ev);
return err;
}
int
perf_event__synthesize_event_update_name(struct perf_tool *tool,
struct perf_evsel *evsel,
perf_event__handler_t process)
{
struct event_update_event *ev;
size_t len = strlen(evsel->name);
int err;
ev = event_update_event__new(len + 1, PERF_EVENT_UPDATE__NAME, evsel->id[0]);
if (ev == NULL)
return -ENOMEM;
strncpy(ev->data, evsel->name, len);
err = process(tool, (union perf_event*) ev, NULL, NULL);
free(ev);
return err;
}
int
perf_event__synthesize_event_update_cpus(struct perf_tool *tool,
struct perf_evsel *evsel,
perf_event__handler_t process)
{
size_t size = sizeof(struct event_update_event);
struct event_update_event *ev;
int max, err;
u16 type;
if (!evsel->own_cpus)
return 0;
ev = cpu_map_data__alloc(evsel->own_cpus, &size, &type, &max);
if (!ev)
return -ENOMEM;
ev->header.type = PERF_RECORD_EVENT_UPDATE;
ev->header.size = (u16)size;
ev->type = PERF_EVENT_UPDATE__CPUS;
ev->id = evsel->id[0];
cpu_map_data__synthesize((struct cpu_map_data *) ev->data,
evsel->own_cpus,
type, max);
err = process(tool, (union perf_event*) ev, NULL, NULL);
free(ev);
return err;
}
size_t perf_event__fprintf_event_update(union perf_event *event, FILE *fp)
{
struct event_update_event *ev = &event->event_update;
struct event_update_event_scale *ev_scale;
struct event_update_event_cpus *ev_cpus;
struct cpu_map *map;
size_t ret;
ret = fprintf(fp, "\n... id: %" PRIu64 "\n", ev->id);
switch (ev->type) {
case PERF_EVENT_UPDATE__SCALE:
ev_scale = (struct event_update_event_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 event_update_event_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__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_entry(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;
}
static bool has_unit(struct perf_evsel *counter)
{
return counter->unit && *counter->unit;
}
static bool has_scale(struct perf_evsel *counter)
{
return counter->scale != 1;
}
int perf_event__synthesize_extra_attr(struct perf_tool *tool,
struct perf_evlist *evsel_list,
perf_event__handler_t process,
bool is_pipe)
{
struct perf_evsel *counter;
int err;
/*
* Synthesize other events stuff not carried within
* attr event - unit, scale, name
*/
evlist__for_each_entry(evsel_list, counter) {
if (!counter->supported)
continue;
/*
* Synthesize unit and scale only if it's defined.
*/
if (has_unit(counter)) {
err = perf_event__synthesize_event_update_unit(tool, counter, process);
if (err < 0) {
pr_err("Couldn't synthesize evsel unit.\n");
return err;
}
}
if (has_scale(counter)) {
err = perf_event__synthesize_event_update_scale(tool, counter, process);
if (err < 0) {
pr_err("Couldn't synthesize evsel counter.\n");
return err;
}
}
if (counter->own_cpus) {
err = perf_event__synthesize_event_update_cpus(tool, counter, process);
if (err < 0) {
pr_err("Couldn't synthesize evsel cpus.\n");
return err;
}
}
/*
* Name is needed only for pipe output,
* perf.data carries event names.
*/
if (is_pipe) {
err = perf_event__synthesize_event_update_name(tool, counter, process);
if (err < 0) {
pr_err("Couldn't synthesize evsel name.\n");
return err;
}
}
}
return 0;
}
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__process_event_update(struct perf_tool *tool __maybe_unused,
union perf_event *event,
struct perf_evlist **pevlist)
{
struct event_update_event *ev = &event->event_update;
struct event_update_event_scale *ev_scale;
struct event_update_event_cpus *ev_cpus;
struct perf_evlist *evlist;
struct perf_evsel *evsel;
struct 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 event_update_event_scale *) ev->data;
evsel->scale = ev_scale->scale;
break;
case PERF_EVENT_UPDATE__CPUS:
ev_cpus = (struct event_update_event_cpus *) ev->data;
map = cpu_map__new_data(&ev_cpus->cpus);
if (map)
evsel->own_cpus = map;
else
pr_err("failed to get event_update cpus\n");
default:
break;
}
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;
struct feat_fd ff;
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);
ff = (struct feat_fd){ .fd = fd };
if (write_padded(&ff, NULL, 0, padding))
return -1;
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__fd(session->data);
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;
}