1 #define _FILE_OFFSET_BITS 64
9 #include <linux/list.h>
10 #include <linux/kernel.h>
11 #include <linux/bitops.h>
12 #include <sys/utsname.h>
18 #include "trace-event.h"
28 static bool no_buildid_cache
= false;
30 static int trace_event_count
;
31 static struct perf_trace_event_type
*trace_events
;
33 static u32 header_argc
;
34 static const char **header_argv
;
36 int perf_header__push_event(u64 id
, const char *name
)
38 struct perf_trace_event_type
*nevents
;
40 if (strlen(name
) > MAX_EVENT_NAME
)
41 pr_warning("Event %s will be truncated\n", name
);
43 nevents
= realloc(trace_events
, (trace_event_count
+ 1) * sizeof(*trace_events
));
46 trace_events
= nevents
;
48 memset(&trace_events
[trace_event_count
], 0, sizeof(struct perf_trace_event_type
));
49 trace_events
[trace_event_count
].event_id
= id
;
50 strncpy(trace_events
[trace_event_count
].name
, name
, MAX_EVENT_NAME
- 1);
55 char *perf_header__find_event(u64 id
)
58 for (i
= 0 ; i
< trace_event_count
; i
++) {
59 if (trace_events
[i
].event_id
== id
)
60 return trace_events
[i
].name
;
67 * must be a numerical value to let the endianness
68 * determine the memory layout. That way we are able
69 * to detect endianness when reading the perf.data file
72 * we check for legacy (PERFFILE) format.
74 static const char *__perf_magic1
= "PERFFILE";
75 static const u64 __perf_magic2
= 0x32454c4946524550ULL
;
76 static const u64 __perf_magic2_sw
= 0x50455246494c4532ULL
;
78 #define PERF_MAGIC __perf_magic2
80 struct perf_file_attr
{
81 struct perf_event_attr attr
;
82 struct perf_file_section ids
;
85 void perf_header__set_feat(struct perf_header
*header
, int feat
)
87 set_bit(feat
, header
->adds_features
);
90 void perf_header__clear_feat(struct perf_header
*header
, int feat
)
92 clear_bit(feat
, header
->adds_features
);
95 bool perf_header__has_feat(const struct perf_header
*header
, int feat
)
97 return test_bit(feat
, header
->adds_features
);
100 static int do_write(int fd
, const void *buf
, size_t size
)
103 int ret
= write(fd
, buf
, size
);
115 #define NAME_ALIGN 64
117 static int write_padded(int fd
, const void *bf
, size_t count
,
118 size_t count_aligned
)
120 static const char zero_buf
[NAME_ALIGN
];
121 int err
= do_write(fd
, bf
, count
);
124 err
= do_write(fd
, zero_buf
, count_aligned
- count
);
129 static int do_write_string(int fd
, const char *str
)
134 olen
= strlen(str
) + 1;
135 len
= PERF_ALIGN(olen
, NAME_ALIGN
);
137 /* write len, incl. \0 */
138 ret
= do_write(fd
, &len
, sizeof(len
));
142 return write_padded(fd
, str
, olen
, len
);
145 static char *do_read_string(int fd
, struct perf_header
*ph
)
151 sz
= readn(fd
, &len
, sizeof(len
));
152 if (sz
< (ssize_t
)sizeof(len
))
162 ret
= readn(fd
, buf
, len
);
163 if (ret
== (ssize_t
)len
) {
165 * strings are padded by zeroes
166 * thus the actual strlen of buf
167 * may be less than len
177 perf_header__set_cmdline(int argc
, const char **argv
)
182 * If header_argv has already been set, do not override it.
183 * This allows a command to set the cmdline, parse args and
184 * then call another builtin function that implements a
185 * command -- e.g, cmd_kvm calling cmd_record.
190 header_argc
= (u32
)argc
;
192 /* do not include NULL termination */
193 header_argv
= calloc(argc
, sizeof(char *));
198 * must copy argv contents because it gets moved
199 * around during option parsing
201 for (i
= 0; i
< argc
; i
++)
202 header_argv
[i
] = argv
[i
];
207 #define dsos__for_each_with_build_id(pos, head) \
208 list_for_each_entry(pos, head, node) \
209 if (!pos->has_build_id) \
213 static int write_buildid(char *name
, size_t name_len
, u8
*build_id
,
214 pid_t pid
, u16 misc
, int fd
)
217 struct build_id_event b
;
221 len
= PERF_ALIGN(len
, NAME_ALIGN
);
223 memset(&b
, 0, sizeof(b
));
224 memcpy(&b
.build_id
, build_id
, BUILD_ID_SIZE
);
226 b
.header
.misc
= misc
;
227 b
.header
.size
= sizeof(b
) + len
;
229 err
= do_write(fd
, &b
, sizeof(b
));
233 return write_padded(fd
, name
, name_len
+ 1, len
);
236 static int __dsos__write_buildid_table(struct list_head
*head
, pid_t pid
,
241 dsos__for_each_with_build_id(pos
, head
) {
249 if (is_vdso_map(pos
->short_name
)) {
250 name
= (char *) VDSO__MAP_NAME
;
251 name_len
= sizeof(VDSO__MAP_NAME
) + 1;
253 name
= pos
->long_name
;
254 name_len
= pos
->long_name_len
+ 1;
257 err
= write_buildid(name
, name_len
, pos
->build_id
,
266 static int machine__write_buildid_table(struct machine
*machine
, int fd
)
269 u16 kmisc
= PERF_RECORD_MISC_KERNEL
,
270 umisc
= PERF_RECORD_MISC_USER
;
272 if (!machine__is_host(machine
)) {
273 kmisc
= PERF_RECORD_MISC_GUEST_KERNEL
;
274 umisc
= PERF_RECORD_MISC_GUEST_USER
;
277 err
= __dsos__write_buildid_table(&machine
->kernel_dsos
, machine
->pid
,
280 err
= __dsos__write_buildid_table(&machine
->user_dsos
,
281 machine
->pid
, umisc
, fd
);
285 static int dsos__write_buildid_table(struct perf_header
*header
, int fd
)
287 struct perf_session
*session
= container_of(header
,
288 struct perf_session
, header
);
290 int err
= machine__write_buildid_table(&session
->host_machine
, fd
);
295 for (nd
= rb_first(&session
->machines
); nd
; nd
= rb_next(nd
)) {
296 struct machine
*pos
= rb_entry(nd
, struct machine
, rb_node
);
297 err
= machine__write_buildid_table(pos
, fd
);
304 int build_id_cache__add_s(const char *sbuild_id
, const char *debugdir
,
305 const char *name
, bool is_kallsyms
, bool is_vdso
)
307 const size_t size
= PATH_MAX
;
308 char *realname
, *filename
= zalloc(size
),
309 *linkname
= zalloc(size
), *targetname
;
311 bool slash
= is_kallsyms
|| is_vdso
;
314 if (symbol_conf
.kptr_restrict
) {
315 pr_debug("Not caching a kptr_restrict'ed /proc/kallsyms\n");
318 realname
= (char *) name
;
320 realname
= realpath(name
, NULL
);
322 if (realname
== NULL
|| filename
== NULL
|| linkname
== NULL
)
325 len
= scnprintf(filename
, size
, "%s%s%s",
326 debugdir
, slash
? "/" : "",
327 is_vdso
? VDSO__MAP_NAME
: realname
);
328 if (mkdir_p(filename
, 0755))
331 snprintf(filename
+ len
, size
- len
, "/%s", sbuild_id
);
333 if (access(filename
, F_OK
)) {
335 if (copyfile("/proc/kallsyms", filename
))
337 } else if (link(realname
, filename
) && copyfile(name
, filename
))
341 len
= scnprintf(linkname
, size
, "%s/.build-id/%.2s",
342 debugdir
, sbuild_id
);
344 if (access(linkname
, X_OK
) && mkdir_p(linkname
, 0755))
347 snprintf(linkname
+ len
, size
- len
, "/%s", sbuild_id
+ 2);
348 targetname
= filename
+ strlen(debugdir
) - 5;
349 memcpy(targetname
, "../..", 5);
351 if (symlink(targetname
, linkname
) == 0)
361 static int build_id_cache__add_b(const u8
*build_id
, size_t build_id_size
,
362 const char *name
, const char *debugdir
,
363 bool is_kallsyms
, bool is_vdso
)
365 char sbuild_id
[BUILD_ID_SIZE
* 2 + 1];
367 build_id__sprintf(build_id
, build_id_size
, sbuild_id
);
369 return build_id_cache__add_s(sbuild_id
, debugdir
, name
,
370 is_kallsyms
, is_vdso
);
373 int build_id_cache__remove_s(const char *sbuild_id
, const char *debugdir
)
375 const size_t size
= PATH_MAX
;
376 char *filename
= zalloc(size
),
377 *linkname
= zalloc(size
);
380 if (filename
== NULL
|| linkname
== NULL
)
383 snprintf(linkname
, size
, "%s/.build-id/%.2s/%s",
384 debugdir
, sbuild_id
, sbuild_id
+ 2);
386 if (access(linkname
, F_OK
))
389 if (readlink(linkname
, filename
, size
- 1) < 0)
392 if (unlink(linkname
))
396 * Since the link is relative, we must make it absolute:
398 snprintf(linkname
, size
, "%s/.build-id/%.2s/%s",
399 debugdir
, sbuild_id
, filename
);
401 if (unlink(linkname
))
411 static int dso__cache_build_id(struct dso
*dso
, const char *debugdir
)
413 bool is_kallsyms
= dso
->kernel
&& dso
->long_name
[0] != '/';
414 bool is_vdso
= is_vdso_map(dso
->short_name
);
416 return build_id_cache__add_b(dso
->build_id
, sizeof(dso
->build_id
),
417 dso
->long_name
, debugdir
,
418 is_kallsyms
, is_vdso
);
421 static int __dsos__cache_build_ids(struct list_head
*head
, const char *debugdir
)
426 dsos__for_each_with_build_id(pos
, head
)
427 if (dso__cache_build_id(pos
, debugdir
))
433 static int machine__cache_build_ids(struct machine
*machine
, const char *debugdir
)
435 int ret
= __dsos__cache_build_ids(&machine
->kernel_dsos
, debugdir
);
436 ret
|= __dsos__cache_build_ids(&machine
->user_dsos
, debugdir
);
440 static int perf_session__cache_build_ids(struct perf_session
*session
)
444 char debugdir
[PATH_MAX
];
446 snprintf(debugdir
, sizeof(debugdir
), "%s", buildid_dir
);
448 if (mkdir(debugdir
, 0755) != 0 && errno
!= EEXIST
)
451 ret
= machine__cache_build_ids(&session
->host_machine
, debugdir
);
453 for (nd
= rb_first(&session
->machines
); nd
; nd
= rb_next(nd
)) {
454 struct machine
*pos
= rb_entry(nd
, struct machine
, rb_node
);
455 ret
|= machine__cache_build_ids(pos
, debugdir
);
460 static bool machine__read_build_ids(struct machine
*machine
, bool with_hits
)
462 bool ret
= __dsos__read_build_ids(&machine
->kernel_dsos
, with_hits
);
463 ret
|= __dsos__read_build_ids(&machine
->user_dsos
, with_hits
);
467 static bool perf_session__read_build_ids(struct perf_session
*session
, bool with_hits
)
470 bool ret
= machine__read_build_ids(&session
->host_machine
, with_hits
);
472 for (nd
= rb_first(&session
->machines
); nd
; nd
= rb_next(nd
)) {
473 struct machine
*pos
= rb_entry(nd
, struct machine
, rb_node
);
474 ret
|= machine__read_build_ids(pos
, with_hits
);
480 static int write_tracing_data(int fd
, struct perf_header
*h __maybe_unused
,
481 struct perf_evlist
*evlist
)
483 return read_tracing_data(fd
, &evlist
->entries
);
487 static int write_build_id(int fd
, struct perf_header
*h
,
488 struct perf_evlist
*evlist __maybe_unused
)
490 struct perf_session
*session
;
493 session
= container_of(h
, struct perf_session
, header
);
495 if (!perf_session__read_build_ids(session
, true))
498 err
= dsos__write_buildid_table(h
, fd
);
500 pr_debug("failed to write buildid table\n");
503 if (!no_buildid_cache
)
504 perf_session__cache_build_ids(session
);
509 static int write_hostname(int fd
, struct perf_header
*h __maybe_unused
,
510 struct perf_evlist
*evlist __maybe_unused
)
519 return do_write_string(fd
, uts
.nodename
);
522 static int write_osrelease(int fd
, struct perf_header
*h __maybe_unused
,
523 struct perf_evlist
*evlist __maybe_unused
)
532 return do_write_string(fd
, uts
.release
);
535 static int write_arch(int fd
, struct perf_header
*h __maybe_unused
,
536 struct perf_evlist
*evlist __maybe_unused
)
545 return do_write_string(fd
, uts
.machine
);
548 static int write_version(int fd
, struct perf_header
*h __maybe_unused
,
549 struct perf_evlist
*evlist __maybe_unused
)
551 return do_write_string(fd
, perf_version_string
);
554 static int write_cpudesc(int fd
, struct perf_header
*h __maybe_unused
,
555 struct perf_evlist
*evlist __maybe_unused
)
558 #define CPUINFO_PROC NULL
563 const char *search
= CPUINFO_PROC
;
570 file
= fopen("/proc/cpuinfo", "r");
574 while (getline(&buf
, &len
, file
) > 0) {
575 ret
= strncmp(buf
, search
, strlen(search
));
585 p
= strchr(buf
, ':');
586 if (p
&& *(p
+1) == ' ' && *(p
+2))
592 /* squash extra space characters (branding string) */
599 while (*q
&& isspace(*q
))
602 while ((*r
++ = *q
++));
606 ret
= do_write_string(fd
, s
);
613 static int write_nrcpus(int fd
, struct perf_header
*h __maybe_unused
,
614 struct perf_evlist
*evlist __maybe_unused
)
620 nr
= sysconf(_SC_NPROCESSORS_CONF
);
624 nrc
= (u32
)(nr
& UINT_MAX
);
626 nr
= sysconf(_SC_NPROCESSORS_ONLN
);
630 nra
= (u32
)(nr
& UINT_MAX
);
632 ret
= do_write(fd
, &nrc
, sizeof(nrc
));
636 return do_write(fd
, &nra
, sizeof(nra
));
639 static int write_event_desc(int fd
, struct perf_header
*h __maybe_unused
,
640 struct perf_evlist
*evlist
)
642 struct perf_evsel
*evsel
;
646 nre
= evlist
->nr_entries
;
649 * write number of events
651 ret
= do_write(fd
, &nre
, sizeof(nre
));
656 * size of perf_event_attr struct
658 sz
= (u32
)sizeof(evsel
->attr
);
659 ret
= do_write(fd
, &sz
, sizeof(sz
));
663 list_for_each_entry(evsel
, &evlist
->entries
, node
) {
665 ret
= do_write(fd
, &evsel
->attr
, sz
);
669 * write number of unique id per event
670 * there is one id per instance of an event
672 * copy into an nri to be independent of the
676 ret
= do_write(fd
, &nri
, sizeof(nri
));
681 * write event string as passed on cmdline
683 ret
= do_write_string(fd
, perf_evsel__name(evsel
));
687 * write unique ids for this event
689 ret
= do_write(fd
, evsel
->id
, evsel
->ids
* sizeof(u64
));
696 static int write_cmdline(int fd
, struct perf_header
*h __maybe_unused
,
697 struct perf_evlist
*evlist __maybe_unused
)
699 char buf
[MAXPATHLEN
];
705 * actual atual path to perf binary
707 sprintf(proc
, "/proc/%d/exe", getpid());
708 ret
= readlink(proc
, buf
, sizeof(buf
));
712 /* readlink() does not add null termination */
715 /* account for binary path */
718 ret
= do_write(fd
, &n
, sizeof(n
));
722 ret
= do_write_string(fd
, buf
);
726 for (i
= 0 ; i
< header_argc
; i
++) {
727 ret
= do_write_string(fd
, header_argv
[i
]);
734 #define CORE_SIB_FMT \
735 "/sys/devices/system/cpu/cpu%d/topology/core_siblings_list"
736 #define THRD_SIB_FMT \
737 "/sys/devices/system/cpu/cpu%d/topology/thread_siblings_list"
742 char **core_siblings
;
743 char **thread_siblings
;
746 static int build_cpu_topo(struct cpu_topo
*tp
, int cpu
)
749 char filename
[MAXPATHLEN
];
750 char *buf
= NULL
, *p
;
755 sprintf(filename
, CORE_SIB_FMT
, cpu
);
756 fp
= fopen(filename
, "r");
760 if (getline(&buf
, &len
, fp
) <= 0)
765 p
= strchr(buf
, '\n');
769 for (i
= 0; i
< tp
->core_sib
; i
++) {
770 if (!strcmp(buf
, tp
->core_siblings
[i
]))
773 if (i
== tp
->core_sib
) {
774 tp
->core_siblings
[i
] = buf
;
780 sprintf(filename
, THRD_SIB_FMT
, cpu
);
781 fp
= fopen(filename
, "r");
785 if (getline(&buf
, &len
, fp
) <= 0)
788 p
= strchr(buf
, '\n');
792 for (i
= 0; i
< tp
->thread_sib
; i
++) {
793 if (!strcmp(buf
, tp
->thread_siblings
[i
]))
796 if (i
== tp
->thread_sib
) {
797 tp
->thread_siblings
[i
] = buf
;
809 static void free_cpu_topo(struct cpu_topo
*tp
)
816 for (i
= 0 ; i
< tp
->core_sib
; i
++)
817 free(tp
->core_siblings
[i
]);
819 for (i
= 0 ; i
< tp
->thread_sib
; i
++)
820 free(tp
->thread_siblings
[i
]);
825 static struct cpu_topo
*build_cpu_topology(void)
834 ncpus
= sysconf(_SC_NPROCESSORS_CONF
);
838 nr
= (u32
)(ncpus
& UINT_MAX
);
840 sz
= nr
* sizeof(char *);
842 addr
= calloc(1, sizeof(*tp
) + 2 * sz
);
849 tp
->core_siblings
= addr
;
851 tp
->thread_siblings
= addr
;
853 for (i
= 0; i
< nr
; i
++) {
854 ret
= build_cpu_topo(tp
, i
);
865 static int write_cpu_topology(int fd
, struct perf_header
*h __maybe_unused
,
866 struct perf_evlist
*evlist __maybe_unused
)
872 tp
= build_cpu_topology();
876 ret
= do_write(fd
, &tp
->core_sib
, sizeof(tp
->core_sib
));
880 for (i
= 0; i
< tp
->core_sib
; i
++) {
881 ret
= do_write_string(fd
, tp
->core_siblings
[i
]);
885 ret
= do_write(fd
, &tp
->thread_sib
, sizeof(tp
->thread_sib
));
889 for (i
= 0; i
< tp
->thread_sib
; i
++) {
890 ret
= do_write_string(fd
, tp
->thread_siblings
[i
]);
901 static int write_total_mem(int fd
, struct perf_header
*h __maybe_unused
,
902 struct perf_evlist
*evlist __maybe_unused
)
910 fp
= fopen("/proc/meminfo", "r");
914 while (getline(&buf
, &len
, fp
) > 0) {
915 ret
= strncmp(buf
, "MemTotal:", 9);
920 n
= sscanf(buf
, "%*s %"PRIu64
, &mem
);
922 ret
= do_write(fd
, &mem
, sizeof(mem
));
929 static int write_topo_node(int fd
, int node
)
931 char str
[MAXPATHLEN
];
933 char *buf
= NULL
, *p
;
936 u64 mem_total
, mem_free
, mem
;
939 sprintf(str
, "/sys/devices/system/node/node%d/meminfo", node
);
940 fp
= fopen(str
, "r");
944 while (getline(&buf
, &len
, fp
) > 0) {
945 /* skip over invalid lines */
946 if (!strchr(buf
, ':'))
948 if (sscanf(buf
, "%*s %*d %s %"PRIu64
, field
, &mem
) != 2)
950 if (!strcmp(field
, "MemTotal:"))
952 if (!strcmp(field
, "MemFree:"))
958 ret
= do_write(fd
, &mem_total
, sizeof(u64
));
962 ret
= do_write(fd
, &mem_free
, sizeof(u64
));
967 sprintf(str
, "/sys/devices/system/node/node%d/cpulist", node
);
969 fp
= fopen(str
, "r");
973 if (getline(&buf
, &len
, fp
) <= 0)
976 p
= strchr(buf
, '\n');
980 ret
= do_write_string(fd
, buf
);
987 static int write_numa_topology(int fd
, struct perf_header
*h __maybe_unused
,
988 struct perf_evlist
*evlist __maybe_unused
)
993 struct cpu_map
*node_map
= NULL
;
998 fp
= fopen("/sys/devices/system/node/online", "r");
1002 if (getline(&buf
, &len
, fp
) <= 0)
1005 c
= strchr(buf
, '\n');
1009 node_map
= cpu_map__new(buf
);
1013 nr
= (u32
)node_map
->nr
;
1015 ret
= do_write(fd
, &nr
, sizeof(nr
));
1019 for (i
= 0; i
< nr
; i
++) {
1020 j
= (u32
)node_map
->map
[i
];
1021 ret
= do_write(fd
, &j
, sizeof(j
));
1025 ret
= write_topo_node(fd
, i
);
1039 * struct pmu_mappings {
1048 static int write_pmu_mappings(int fd
, struct perf_header
*h __maybe_unused
,
1049 struct perf_evlist
*evlist __maybe_unused
)
1051 struct perf_pmu
*pmu
= NULL
;
1052 off_t offset
= lseek(fd
, 0, SEEK_CUR
);
1056 /* write real pmu_num later */
1057 ret
= do_write(fd
, &pmu_num
, sizeof(pmu_num
));
1061 while ((pmu
= perf_pmu__scan(pmu
))) {
1066 ret
= do_write(fd
, &pmu
->type
, sizeof(pmu
->type
));
1070 ret
= do_write_string(fd
, pmu
->name
);
1075 if (pwrite(fd
, &pmu_num
, sizeof(pmu_num
), offset
) != sizeof(pmu_num
)) {
1077 lseek(fd
, offset
, SEEK_SET
);
1085 * default get_cpuid(): nothing gets recorded
1086 * actual implementation must be in arch/$(ARCH)/util/header.c
1088 int __attribute__ ((weak
)) get_cpuid(char *buffer __maybe_unused
,
1089 size_t sz __maybe_unused
)
1094 static int write_cpuid(int fd
, struct perf_header
*h __maybe_unused
,
1095 struct perf_evlist
*evlist __maybe_unused
)
1100 ret
= get_cpuid(buffer
, sizeof(buffer
));
1106 return do_write_string(fd
, buffer
);
1109 static int write_branch_stack(int fd __maybe_unused
,
1110 struct perf_header
*h __maybe_unused
,
1111 struct perf_evlist
*evlist __maybe_unused
)
1116 static void print_hostname(struct perf_header
*ph
, int fd __maybe_unused
,
1119 fprintf(fp
, "# hostname : %s\n", ph
->env
.hostname
);
1122 static void print_osrelease(struct perf_header
*ph
, int fd __maybe_unused
,
1125 fprintf(fp
, "# os release : %s\n", ph
->env
.os_release
);
1128 static void print_arch(struct perf_header
*ph
, int fd __maybe_unused
, FILE *fp
)
1130 fprintf(fp
, "# arch : %s\n", ph
->env
.arch
);
1133 static void print_cpudesc(struct perf_header
*ph
, int fd __maybe_unused
,
1136 fprintf(fp
, "# cpudesc : %s\n", ph
->env
.cpu_desc
);
1139 static void print_nrcpus(struct perf_header
*ph
, int fd __maybe_unused
,
1142 fprintf(fp
, "# nrcpus online : %u\n", ph
->env
.nr_cpus_online
);
1143 fprintf(fp
, "# nrcpus avail : %u\n", ph
->env
.nr_cpus_avail
);
1146 static void print_version(struct perf_header
*ph
, int fd __maybe_unused
,
1149 fprintf(fp
, "# perf version : %s\n", ph
->env
.version
);
1152 static void print_cmdline(struct perf_header
*ph
, int fd __maybe_unused
,
1158 nr
= ph
->env
.nr_cmdline
;
1159 str
= ph
->env
.cmdline
;
1161 fprintf(fp
, "# cmdline : ");
1163 for (i
= 0; i
< nr
; i
++) {
1164 fprintf(fp
, "%s ", str
);
1165 str
+= strlen(str
) + 1;
1170 static void print_cpu_topology(struct perf_header
*ph
, int fd __maybe_unused
,
1176 nr
= ph
->env
.nr_sibling_cores
;
1177 str
= ph
->env
.sibling_cores
;
1179 for (i
= 0; i
< nr
; i
++) {
1180 fprintf(fp
, "# sibling cores : %s\n", str
);
1181 str
+= strlen(str
) + 1;
1184 nr
= ph
->env
.nr_sibling_threads
;
1185 str
= ph
->env
.sibling_threads
;
1187 for (i
= 0; i
< nr
; i
++) {
1188 fprintf(fp
, "# sibling threads : %s\n", str
);
1189 str
+= strlen(str
) + 1;
1193 static void free_event_desc(struct perf_evsel
*events
)
1195 struct perf_evsel
*evsel
;
1200 for (evsel
= events
; evsel
->attr
.size
; evsel
++) {
1210 static struct perf_evsel
*
1211 read_event_desc(struct perf_header
*ph
, int fd
)
1213 struct perf_evsel
*evsel
, *events
= NULL
;
1216 u32 nre
, sz
, nr
, i
, j
;
1220 /* number of events */
1221 ret
= readn(fd
, &nre
, sizeof(nre
));
1222 if (ret
!= (ssize_t
)sizeof(nre
))
1226 nre
= bswap_32(nre
);
1228 ret
= readn(fd
, &sz
, sizeof(sz
));
1229 if (ret
!= (ssize_t
)sizeof(sz
))
1235 /* buffer to hold on file attr struct */
1240 /* the last event terminates with evsel->attr.size == 0: */
1241 events
= calloc(nre
+ 1, sizeof(*events
));
1245 msz
= sizeof(evsel
->attr
);
1249 for (i
= 0, evsel
= events
; i
< nre
; evsel
++, i
++) {
1253 * must read entire on-file attr struct to
1254 * sync up with layout.
1256 ret
= readn(fd
, buf
, sz
);
1257 if (ret
!= (ssize_t
)sz
)
1261 perf_event__attr_swap(buf
);
1263 memcpy(&evsel
->attr
, buf
, msz
);
1265 ret
= readn(fd
, &nr
, sizeof(nr
));
1266 if (ret
!= (ssize_t
)sizeof(nr
))
1269 if (ph
->needs_swap
) {
1271 evsel
->needs_swap
= true;
1274 evsel
->name
= do_read_string(fd
, ph
);
1279 id
= calloc(nr
, sizeof(*id
));
1285 for (j
= 0 ; j
< nr
; j
++) {
1286 ret
= readn(fd
, id
, sizeof(*id
));
1287 if (ret
!= (ssize_t
)sizeof(*id
))
1290 *id
= bswap_64(*id
);
1300 free_event_desc(events
);
1305 static void print_event_desc(struct perf_header
*ph
, int fd
, FILE *fp
)
1307 struct perf_evsel
*evsel
, *events
= read_event_desc(ph
, fd
);
1312 fprintf(fp
, "# event desc: not available or unable to read\n");
1316 for (evsel
= events
; evsel
->attr
.size
; evsel
++) {
1317 fprintf(fp
, "# event : name = %s, ", evsel
->name
);
1319 fprintf(fp
, "type = %d, config = 0x%"PRIx64
1320 ", config1 = 0x%"PRIx64
", config2 = 0x%"PRIx64
,
1322 (u64
)evsel
->attr
.config
,
1323 (u64
)evsel
->attr
.config1
,
1324 (u64
)evsel
->attr
.config2
);
1326 fprintf(fp
, ", excl_usr = %d, excl_kern = %d",
1327 evsel
->attr
.exclude_user
,
1328 evsel
->attr
.exclude_kernel
);
1330 fprintf(fp
, ", excl_host = %d, excl_guest = %d",
1331 evsel
->attr
.exclude_host
,
1332 evsel
->attr
.exclude_guest
);
1334 fprintf(fp
, ", precise_ip = %d", evsel
->attr
.precise_ip
);
1337 fprintf(fp
, ", id = {");
1338 for (j
= 0, id
= evsel
->id
; j
< evsel
->ids
; j
++, id
++) {
1341 fprintf(fp
, " %"PRIu64
, *id
);
1349 free_event_desc(events
);
1352 static void print_total_mem(struct perf_header
*ph
, int fd __maybe_unused
,
1355 fprintf(fp
, "# total memory : %Lu kB\n", ph
->env
.total_mem
);
1358 static void print_numa_topology(struct perf_header
*ph
, int fd __maybe_unused
,
1363 uint64_t mem_total
, mem_free
;
1366 nr
= ph
->env
.nr_numa_nodes
;
1367 str
= ph
->env
.numa_nodes
;
1369 for (i
= 0; i
< nr
; i
++) {
1371 c
= strtoul(str
, &tmp
, 0);
1376 mem_total
= strtoull(str
, &tmp
, 0);
1381 mem_free
= strtoull(str
, &tmp
, 0);
1385 fprintf(fp
, "# node%u meminfo : total = %"PRIu64
" kB,"
1386 " free = %"PRIu64
" kB\n",
1387 c
, mem_total
, mem_free
);
1390 fprintf(fp
, "# node%u cpu list : %s\n", c
, str
);
1392 str
+= strlen(str
) + 1;
1396 fprintf(fp
, "# numa topology : not available\n");
1399 static void print_cpuid(struct perf_header
*ph
, int fd __maybe_unused
, FILE *fp
)
1401 fprintf(fp
, "# cpuid : %s\n", ph
->env
.cpuid
);
1404 static void print_branch_stack(struct perf_header
*ph __maybe_unused
,
1405 int fd __maybe_unused
, FILE *fp
)
1407 fprintf(fp
, "# contains samples with branch stack\n");
1410 static void print_pmu_mappings(struct perf_header
*ph
, int fd __maybe_unused
,
1413 const char *delimiter
= "# pmu mappings: ";
1418 pmu_num
= ph
->env
.nr_pmu_mappings
;
1420 fprintf(fp
, "# pmu mappings: not available\n");
1424 str
= ph
->env
.pmu_mappings
;
1427 type
= strtoul(str
, &tmp
, 0);
1432 fprintf(fp
, "%s%s = %" PRIu32
, delimiter
, str
, type
);
1435 str
+= strlen(str
) + 1;
1444 fprintf(fp
, "# pmu mappings: unable to read\n");
1447 static int __event_process_build_id(struct build_id_event
*bev
,
1449 struct perf_session
*session
)
1452 struct list_head
*head
;
1453 struct machine
*machine
;
1456 enum dso_kernel_type dso_type
;
1458 machine
= perf_session__findnew_machine(session
, bev
->pid
);
1462 misc
= bev
->header
.misc
& PERF_RECORD_MISC_CPUMODE_MASK
;
1465 case PERF_RECORD_MISC_KERNEL
:
1466 dso_type
= DSO_TYPE_KERNEL
;
1467 head
= &machine
->kernel_dsos
;
1469 case PERF_RECORD_MISC_GUEST_KERNEL
:
1470 dso_type
= DSO_TYPE_GUEST_KERNEL
;
1471 head
= &machine
->kernel_dsos
;
1473 case PERF_RECORD_MISC_USER
:
1474 case PERF_RECORD_MISC_GUEST_USER
:
1475 dso_type
= DSO_TYPE_USER
;
1476 head
= &machine
->user_dsos
;
1482 dso
= __dsos__findnew(head
, filename
);
1484 char sbuild_id
[BUILD_ID_SIZE
* 2 + 1];
1486 dso__set_build_id(dso
, &bev
->build_id
);
1488 if (filename
[0] == '[')
1489 dso
->kernel
= dso_type
;
1491 build_id__sprintf(dso
->build_id
, sizeof(dso
->build_id
),
1493 pr_debug("build id event received for %s: %s\n",
1494 dso
->long_name
, sbuild_id
);
1502 static int perf_header__read_build_ids_abi_quirk(struct perf_header
*header
,
1503 int input
, u64 offset
, u64 size
)
1505 struct perf_session
*session
= container_of(header
, struct perf_session
, header
);
1507 struct perf_event_header header
;
1508 u8 build_id
[PERF_ALIGN(BUILD_ID_SIZE
, sizeof(u64
))];
1511 struct build_id_event bev
;
1512 char filename
[PATH_MAX
];
1513 u64 limit
= offset
+ size
;
1515 while (offset
< limit
) {
1518 if (readn(input
, &old_bev
, sizeof(old_bev
)) != sizeof(old_bev
))
1521 if (header
->needs_swap
)
1522 perf_event_header__bswap(&old_bev
.header
);
1524 len
= old_bev
.header
.size
- sizeof(old_bev
);
1525 if (readn(input
, filename
, len
) != len
)
1528 bev
.header
= old_bev
.header
;
1531 * As the pid is the missing value, we need to fill
1532 * it properly. The header.misc value give us nice hint.
1534 bev
.pid
= HOST_KERNEL_ID
;
1535 if (bev
.header
.misc
== PERF_RECORD_MISC_GUEST_USER
||
1536 bev
.header
.misc
== PERF_RECORD_MISC_GUEST_KERNEL
)
1537 bev
.pid
= DEFAULT_GUEST_KERNEL_ID
;
1539 memcpy(bev
.build_id
, old_bev
.build_id
, sizeof(bev
.build_id
));
1540 __event_process_build_id(&bev
, filename
, session
);
1542 offset
+= bev
.header
.size
;
1548 static int perf_header__read_build_ids(struct perf_header
*header
,
1549 int input
, u64 offset
, u64 size
)
1551 struct perf_session
*session
= container_of(header
, struct perf_session
, header
);
1552 struct build_id_event bev
;
1553 char filename
[PATH_MAX
];
1554 u64 limit
= offset
+ size
, orig_offset
= offset
;
1557 while (offset
< limit
) {
1560 if (readn(input
, &bev
, sizeof(bev
)) != sizeof(bev
))
1563 if (header
->needs_swap
)
1564 perf_event_header__bswap(&bev
.header
);
1566 len
= bev
.header
.size
- sizeof(bev
);
1567 if (readn(input
, filename
, len
) != len
)
1570 * The a1645ce1 changeset:
1572 * "perf: 'perf kvm' tool for monitoring guest performance from host"
1574 * Added a field to struct build_id_event that broke the file
1577 * Since the kernel build-id is the first entry, process the
1578 * table using the old format if the well known
1579 * '[kernel.kallsyms]' string for the kernel build-id has the
1580 * first 4 characters chopped off (where the pid_t sits).
1582 if (memcmp(filename
, "nel.kallsyms]", 13) == 0) {
1583 if (lseek(input
, orig_offset
, SEEK_SET
) == (off_t
)-1)
1585 return perf_header__read_build_ids_abi_quirk(header
, input
, offset
, size
);
1588 __event_process_build_id(&bev
, filename
, session
);
1590 offset
+= bev
.header
.size
;
1597 static int process_tracing_data(struct perf_file_section
*section __maybe_unused
,
1598 struct perf_header
*ph __maybe_unused
,
1601 trace_report(fd
, data
, false);
1605 static int process_build_id(struct perf_file_section
*section
,
1606 struct perf_header
*ph
, int fd
,
1607 void *data __maybe_unused
)
1609 if (perf_header__read_build_ids(ph
, fd
, section
->offset
, section
->size
))
1610 pr_debug("Failed to read buildids, continuing...\n");
1614 static int process_hostname(struct perf_file_section
*section __maybe_unused
,
1615 struct perf_header
*ph
, int fd
,
1616 void *data __maybe_unused
)
1618 ph
->env
.hostname
= do_read_string(fd
, ph
);
1619 return ph
->env
.hostname
? 0 : -ENOMEM
;
1622 static int process_osrelease(struct perf_file_section
*section __maybe_unused
,
1623 struct perf_header
*ph
, int fd
,
1624 void *data __maybe_unused
)
1626 ph
->env
.os_release
= do_read_string(fd
, ph
);
1627 return ph
->env
.os_release
? 0 : -ENOMEM
;
1630 static int process_version(struct perf_file_section
*section __maybe_unused
,
1631 struct perf_header
*ph
, int fd
,
1632 void *data __maybe_unused
)
1634 ph
->env
.version
= do_read_string(fd
, ph
);
1635 return ph
->env
.version
? 0 : -ENOMEM
;
1638 static int process_arch(struct perf_file_section
*section __maybe_unused
,
1639 struct perf_header
*ph
, int fd
,
1640 void *data __maybe_unused
)
1642 ph
->env
.arch
= do_read_string(fd
, ph
);
1643 return ph
->env
.arch
? 0 : -ENOMEM
;
1646 static int process_nrcpus(struct perf_file_section
*section __maybe_unused
,
1647 struct perf_header
*ph
, int fd
,
1648 void *data __maybe_unused
)
1653 ret
= readn(fd
, &nr
, sizeof(nr
));
1654 if (ret
!= sizeof(nr
))
1660 ph
->env
.nr_cpus_online
= nr
;
1662 ret
= readn(fd
, &nr
, sizeof(nr
));
1663 if (ret
!= sizeof(nr
))
1669 ph
->env
.nr_cpus_avail
= nr
;
1673 static int process_cpudesc(struct perf_file_section
*section __maybe_unused
,
1674 struct perf_header
*ph
, int fd
,
1675 void *data __maybe_unused
)
1677 ph
->env
.cpu_desc
= do_read_string(fd
, ph
);
1678 return ph
->env
.cpu_desc
? 0 : -ENOMEM
;
1681 static int process_cpuid(struct perf_file_section
*section __maybe_unused
,
1682 struct perf_header
*ph
, int fd
,
1683 void *data __maybe_unused
)
1685 ph
->env
.cpuid
= do_read_string(fd
, ph
);
1686 return ph
->env
.cpuid
? 0 : -ENOMEM
;
1689 static int process_total_mem(struct perf_file_section
*section __maybe_unused
,
1690 struct perf_header
*ph
, int fd
,
1691 void *data __maybe_unused
)
1696 ret
= readn(fd
, &mem
, sizeof(mem
));
1697 if (ret
!= sizeof(mem
))
1701 mem
= bswap_64(mem
);
1703 ph
->env
.total_mem
= mem
;
1707 static struct perf_evsel
*
1708 perf_evlist__find_by_index(struct perf_evlist
*evlist
, int idx
)
1710 struct perf_evsel
*evsel
;
1712 list_for_each_entry(evsel
, &evlist
->entries
, node
) {
1713 if (evsel
->idx
== idx
)
1721 perf_evlist__set_event_name(struct perf_evlist
*evlist
,
1722 struct perf_evsel
*event
)
1724 struct perf_evsel
*evsel
;
1729 evsel
= perf_evlist__find_by_index(evlist
, event
->idx
);
1736 evsel
->name
= strdup(event
->name
);
1740 process_event_desc(struct perf_file_section
*section __maybe_unused
,
1741 struct perf_header
*header
, int fd
,
1742 void *data __maybe_unused
)
1744 struct perf_session
*session
;
1745 struct perf_evsel
*evsel
, *events
= read_event_desc(header
, fd
);
1750 session
= container_of(header
, struct perf_session
, header
);
1751 for (evsel
= events
; evsel
->attr
.size
; evsel
++)
1752 perf_evlist__set_event_name(session
->evlist
, evsel
);
1754 free_event_desc(events
);
1759 static int process_cmdline(struct perf_file_section
*section __maybe_unused
,
1760 struct perf_header
*ph
, int fd
,
1761 void *data __maybe_unused
)
1768 ret
= readn(fd
, &nr
, sizeof(nr
));
1769 if (ret
!= sizeof(nr
))
1775 ph
->env
.nr_cmdline
= nr
;
1776 strbuf_init(&sb
, 128);
1778 for (i
= 0; i
< nr
; i
++) {
1779 str
= do_read_string(fd
, ph
);
1783 /* include a NULL character at the end */
1784 strbuf_add(&sb
, str
, strlen(str
) + 1);
1787 ph
->env
.cmdline
= strbuf_detach(&sb
, NULL
);
1791 strbuf_release(&sb
);
1795 static int process_cpu_topology(struct perf_file_section
*section __maybe_unused
,
1796 struct perf_header
*ph
, int fd
,
1797 void *data __maybe_unused
)
1804 ret
= readn(fd
, &nr
, sizeof(nr
));
1805 if (ret
!= sizeof(nr
))
1811 ph
->env
.nr_sibling_cores
= nr
;
1812 strbuf_init(&sb
, 128);
1814 for (i
= 0; i
< nr
; i
++) {
1815 str
= do_read_string(fd
, ph
);
1819 /* include a NULL character at the end */
1820 strbuf_add(&sb
, str
, strlen(str
) + 1);
1823 ph
->env
.sibling_cores
= strbuf_detach(&sb
, NULL
);
1825 ret
= readn(fd
, &nr
, sizeof(nr
));
1826 if (ret
!= sizeof(nr
))
1832 ph
->env
.nr_sibling_threads
= nr
;
1834 for (i
= 0; i
< nr
; i
++) {
1835 str
= do_read_string(fd
, ph
);
1839 /* include a NULL character at the end */
1840 strbuf_add(&sb
, str
, strlen(str
) + 1);
1843 ph
->env
.sibling_threads
= strbuf_detach(&sb
, NULL
);
1847 strbuf_release(&sb
);
1851 static int process_numa_topology(struct perf_file_section
*section __maybe_unused
,
1852 struct perf_header
*ph
, int fd
,
1853 void *data __maybe_unused
)
1858 uint64_t mem_total
, mem_free
;
1862 ret
= readn(fd
, &nr
, sizeof(nr
));
1863 if (ret
!= sizeof(nr
))
1869 ph
->env
.nr_numa_nodes
= nr
;
1870 strbuf_init(&sb
, 256);
1872 for (i
= 0; i
< nr
; i
++) {
1874 ret
= readn(fd
, &node
, sizeof(node
));
1875 if (ret
!= sizeof(node
))
1878 ret
= readn(fd
, &mem_total
, sizeof(u64
));
1879 if (ret
!= sizeof(u64
))
1882 ret
= readn(fd
, &mem_free
, sizeof(u64
));
1883 if (ret
!= sizeof(u64
))
1886 if (ph
->needs_swap
) {
1887 node
= bswap_32(node
);
1888 mem_total
= bswap_64(mem_total
);
1889 mem_free
= bswap_64(mem_free
);
1892 strbuf_addf(&sb
, "%u:%"PRIu64
":%"PRIu64
":",
1893 node
, mem_total
, mem_free
);
1895 str
= do_read_string(fd
, ph
);
1899 /* include a NULL character at the end */
1900 strbuf_add(&sb
, str
, strlen(str
) + 1);
1903 ph
->env
.numa_nodes
= strbuf_detach(&sb
, NULL
);
1907 strbuf_release(&sb
);
1911 static int process_pmu_mappings(struct perf_file_section
*section __maybe_unused
,
1912 struct perf_header
*ph
, int fd
,
1913 void *data __maybe_unused
)
1921 ret
= readn(fd
, &pmu_num
, sizeof(pmu_num
));
1922 if (ret
!= sizeof(pmu_num
))
1926 pmu_num
= bswap_32(pmu_num
);
1929 pr_debug("pmu mappings not available\n");
1933 ph
->env
.nr_pmu_mappings
= pmu_num
;
1934 strbuf_init(&sb
, 128);
1937 if (readn(fd
, &type
, sizeof(type
)) != sizeof(type
))
1940 type
= bswap_32(type
);
1942 name
= do_read_string(fd
, ph
);
1946 strbuf_addf(&sb
, "%u:%s", type
, name
);
1947 /* include a NULL character at the end */
1948 strbuf_add(&sb
, "", 1);
1953 ph
->env
.pmu_mappings
= strbuf_detach(&sb
, NULL
);
1957 strbuf_release(&sb
);
1961 struct feature_ops
{
1962 int (*write
)(int fd
, struct perf_header
*h
, struct perf_evlist
*evlist
);
1963 void (*print
)(struct perf_header
*h
, int fd
, FILE *fp
);
1964 int (*process
)(struct perf_file_section
*section
,
1965 struct perf_header
*h
, int fd
, void *data
);
1970 #define FEAT_OPA(n, func) \
1971 [n] = { .name = #n, .write = write_##func, .print = print_##func }
1972 #define FEAT_OPP(n, func) \
1973 [n] = { .name = #n, .write = write_##func, .print = print_##func, \
1974 .process = process_##func }
1975 #define FEAT_OPF(n, func) \
1976 [n] = { .name = #n, .write = write_##func, .print = print_##func, \
1977 .process = process_##func, .full_only = true }
1979 /* feature_ops not implemented: */
1980 #define print_tracing_data NULL
1981 #define print_build_id NULL
1983 static const struct feature_ops feat_ops
[HEADER_LAST_FEATURE
] = {
1984 FEAT_OPP(HEADER_TRACING_DATA
, tracing_data
),
1985 FEAT_OPP(HEADER_BUILD_ID
, build_id
),
1986 FEAT_OPP(HEADER_HOSTNAME
, hostname
),
1987 FEAT_OPP(HEADER_OSRELEASE
, osrelease
),
1988 FEAT_OPP(HEADER_VERSION
, version
),
1989 FEAT_OPP(HEADER_ARCH
, arch
),
1990 FEAT_OPP(HEADER_NRCPUS
, nrcpus
),
1991 FEAT_OPP(HEADER_CPUDESC
, cpudesc
),
1992 FEAT_OPP(HEADER_CPUID
, cpuid
),
1993 FEAT_OPP(HEADER_TOTAL_MEM
, total_mem
),
1994 FEAT_OPP(HEADER_EVENT_DESC
, event_desc
),
1995 FEAT_OPP(HEADER_CMDLINE
, cmdline
),
1996 FEAT_OPF(HEADER_CPU_TOPOLOGY
, cpu_topology
),
1997 FEAT_OPF(HEADER_NUMA_TOPOLOGY
, numa_topology
),
1998 FEAT_OPA(HEADER_BRANCH_STACK
, branch_stack
),
1999 FEAT_OPP(HEADER_PMU_MAPPINGS
, pmu_mappings
),
2002 struct header_print_data
{
2004 bool full
; /* extended list of headers */
2007 static int perf_file_section__fprintf_info(struct perf_file_section
*section
,
2008 struct perf_header
*ph
,
2009 int feat
, int fd
, void *data
)
2011 struct header_print_data
*hd
= data
;
2013 if (lseek(fd
, section
->offset
, SEEK_SET
) == (off_t
)-1) {
2014 pr_debug("Failed to lseek to %" PRIu64
" offset for feature "
2015 "%d, continuing...\n", section
->offset
, feat
);
2018 if (feat
>= HEADER_LAST_FEATURE
) {
2019 pr_warning("unknown feature %d\n", feat
);
2022 if (!feat_ops
[feat
].print
)
2025 if (!feat_ops
[feat
].full_only
|| hd
->full
)
2026 feat_ops
[feat
].print(ph
, fd
, hd
->fp
);
2028 fprintf(hd
->fp
, "# %s info available, use -I to display\n",
2029 feat_ops
[feat
].name
);
2034 int perf_header__fprintf_info(struct perf_session
*session
, FILE *fp
, bool full
)
2036 struct header_print_data hd
;
2037 struct perf_header
*header
= &session
->header
;
2038 int fd
= session
->fd
;
2042 perf_header__process_sections(header
, fd
, &hd
,
2043 perf_file_section__fprintf_info
);
2047 static int do_write_feat(int fd
, struct perf_header
*h
, int type
,
2048 struct perf_file_section
**p
,
2049 struct perf_evlist
*evlist
)
2054 if (perf_header__has_feat(h
, type
)) {
2055 if (!feat_ops
[type
].write
)
2058 (*p
)->offset
= lseek(fd
, 0, SEEK_CUR
);
2060 err
= feat_ops
[type
].write(fd
, h
, evlist
);
2062 pr_debug("failed to write feature %d\n", type
);
2064 /* undo anything written */
2065 lseek(fd
, (*p
)->offset
, SEEK_SET
);
2069 (*p
)->size
= lseek(fd
, 0, SEEK_CUR
) - (*p
)->offset
;
2075 static int perf_header__adds_write(struct perf_header
*header
,
2076 struct perf_evlist
*evlist
, int fd
)
2079 struct perf_file_section
*feat_sec
, *p
;
2085 nr_sections
= bitmap_weight(header
->adds_features
, HEADER_FEAT_BITS
);
2089 feat_sec
= p
= calloc(sizeof(*feat_sec
), nr_sections
);
2090 if (feat_sec
== NULL
)
2093 sec_size
= sizeof(*feat_sec
) * nr_sections
;
2095 sec_start
= header
->data_offset
+ header
->data_size
;
2096 lseek(fd
, sec_start
+ sec_size
, SEEK_SET
);
2098 for_each_set_bit(feat
, header
->adds_features
, HEADER_FEAT_BITS
) {
2099 if (do_write_feat(fd
, header
, feat
, &p
, evlist
))
2100 perf_header__clear_feat(header
, feat
);
2103 lseek(fd
, sec_start
, SEEK_SET
);
2105 * may write more than needed due to dropped feature, but
2106 * this is okay, reader will skip the mising entries
2108 err
= do_write(fd
, feat_sec
, sec_size
);
2110 pr_debug("failed to write feature section\n");
2115 int perf_header__write_pipe(int fd
)
2117 struct perf_pipe_file_header f_header
;
2120 f_header
= (struct perf_pipe_file_header
){
2121 .magic
= PERF_MAGIC
,
2122 .size
= sizeof(f_header
),
2125 err
= do_write(fd
, &f_header
, sizeof(f_header
));
2127 pr_debug("failed to write perf pipe header\n");
2134 int perf_session__write_header(struct perf_session
*session
,
2135 struct perf_evlist
*evlist
,
2136 int fd
, bool at_exit
)
2138 struct perf_file_header f_header
;
2139 struct perf_file_attr f_attr
;
2140 struct perf_header
*header
= &session
->header
;
2141 struct perf_evsel
*evsel
, *pair
= NULL
;
2144 lseek(fd
, sizeof(f_header
), SEEK_SET
);
2146 if (session
->evlist
!= evlist
)
2147 pair
= perf_evlist__first(session
->evlist
);
2149 list_for_each_entry(evsel
, &evlist
->entries
, node
) {
2150 evsel
->id_offset
= lseek(fd
, 0, SEEK_CUR
);
2151 err
= do_write(fd
, evsel
->id
, evsel
->ids
* sizeof(u64
));
2154 pr_debug("failed to write perf header\n");
2157 if (session
->evlist
!= evlist
) {
2158 err
= do_write(fd
, pair
->id
, pair
->ids
* sizeof(u64
));
2161 evsel
->ids
+= pair
->ids
;
2162 pair
= perf_evsel__next(pair
);
2166 header
->attr_offset
= lseek(fd
, 0, SEEK_CUR
);
2168 list_for_each_entry(evsel
, &evlist
->entries
, node
) {
2169 f_attr
= (struct perf_file_attr
){
2170 .attr
= evsel
->attr
,
2172 .offset
= evsel
->id_offset
,
2173 .size
= evsel
->ids
* sizeof(u64
),
2176 err
= do_write(fd
, &f_attr
, sizeof(f_attr
));
2178 pr_debug("failed to write perf header attribute\n");
2183 header
->event_offset
= lseek(fd
, 0, SEEK_CUR
);
2184 header
->event_size
= trace_event_count
* sizeof(struct perf_trace_event_type
);
2186 err
= do_write(fd
, trace_events
, header
->event_size
);
2188 pr_debug("failed to write perf header events\n");
2193 header
->data_offset
= lseek(fd
, 0, SEEK_CUR
);
2196 err
= perf_header__adds_write(header
, evlist
, fd
);
2201 f_header
= (struct perf_file_header
){
2202 .magic
= PERF_MAGIC
,
2203 .size
= sizeof(f_header
),
2204 .attr_size
= sizeof(f_attr
),
2206 .offset
= header
->attr_offset
,
2207 .size
= evlist
->nr_entries
* sizeof(f_attr
),
2210 .offset
= header
->data_offset
,
2211 .size
= header
->data_size
,
2214 .offset
= header
->event_offset
,
2215 .size
= header
->event_size
,
2219 memcpy(&f_header
.adds_features
, &header
->adds_features
, sizeof(header
->adds_features
));
2221 lseek(fd
, 0, SEEK_SET
);
2222 err
= do_write(fd
, &f_header
, sizeof(f_header
));
2224 pr_debug("failed to write perf header\n");
2227 lseek(fd
, header
->data_offset
+ header
->data_size
, SEEK_SET
);
2233 static int perf_header__getbuffer64(struct perf_header
*header
,
2234 int fd
, void *buf
, size_t size
)
2236 if (readn(fd
, buf
, size
) <= 0)
2239 if (header
->needs_swap
)
2240 mem_bswap_64(buf
, size
);
2245 int perf_header__process_sections(struct perf_header
*header
, int fd
,
2247 int (*process
)(struct perf_file_section
*section
,
2248 struct perf_header
*ph
,
2249 int feat
, int fd
, void *data
))
2251 struct perf_file_section
*feat_sec
, *sec
;
2257 nr_sections
= bitmap_weight(header
->adds_features
, HEADER_FEAT_BITS
);
2261 feat_sec
= sec
= calloc(sizeof(*feat_sec
), nr_sections
);
2265 sec_size
= sizeof(*feat_sec
) * nr_sections
;
2267 lseek(fd
, header
->data_offset
+ header
->data_size
, SEEK_SET
);
2269 err
= perf_header__getbuffer64(header
, fd
, feat_sec
, sec_size
);
2273 for_each_set_bit(feat
, header
->adds_features
, HEADER_LAST_FEATURE
) {
2274 err
= process(sec
++, header
, feat
, fd
, data
);
2284 static const int attr_file_abi_sizes
[] = {
2285 [0] = PERF_ATTR_SIZE_VER0
,
2286 [1] = PERF_ATTR_SIZE_VER1
,
2287 [2] = PERF_ATTR_SIZE_VER2
,
2288 [3] = PERF_ATTR_SIZE_VER3
,
2293 * In the legacy file format, the magic number is not used to encode endianness.
2294 * hdr_sz was used to encode endianness. But given that hdr_sz can vary based
2295 * on ABI revisions, we need to try all combinations for all endianness to
2296 * detect the endianness.
2298 static int try_all_file_abis(uint64_t hdr_sz
, struct perf_header
*ph
)
2300 uint64_t ref_size
, attr_size
;
2303 for (i
= 0 ; attr_file_abi_sizes
[i
]; i
++) {
2304 ref_size
= attr_file_abi_sizes
[i
]
2305 + sizeof(struct perf_file_section
);
2306 if (hdr_sz
!= ref_size
) {
2307 attr_size
= bswap_64(hdr_sz
);
2308 if (attr_size
!= ref_size
)
2311 ph
->needs_swap
= true;
2313 pr_debug("ABI%d perf.data file detected, need_swap=%d\n",
2318 /* could not determine endianness */
2322 #define PERF_PIPE_HDR_VER0 16
2324 static const size_t attr_pipe_abi_sizes
[] = {
2325 [0] = PERF_PIPE_HDR_VER0
,
2330 * In the legacy pipe format, there is an implicit assumption that endiannesss
2331 * between host recording the samples, and host parsing the samples is the
2332 * same. This is not always the case given that the pipe output may always be
2333 * redirected into a file and analyzed on a different machine with possibly a
2334 * different endianness and perf_event ABI revsions in the perf tool itself.
2336 static int try_all_pipe_abis(uint64_t hdr_sz
, struct perf_header
*ph
)
2341 for (i
= 0 ; attr_pipe_abi_sizes
[i
]; i
++) {
2342 if (hdr_sz
!= attr_pipe_abi_sizes
[i
]) {
2343 attr_size
= bswap_64(hdr_sz
);
2344 if (attr_size
!= hdr_sz
)
2347 ph
->needs_swap
= true;
2349 pr_debug("Pipe ABI%d perf.data file detected\n", i
);
2355 bool is_perf_magic(u64 magic
)
2357 if (!memcmp(&magic
, __perf_magic1
, sizeof(magic
))
2358 || magic
== __perf_magic2
2359 || magic
== __perf_magic2_sw
)
2365 static int check_magic_endian(u64 magic
, uint64_t hdr_sz
,
2366 bool is_pipe
, struct perf_header
*ph
)
2370 /* check for legacy format */
2371 ret
= memcmp(&magic
, __perf_magic1
, sizeof(magic
));
2373 pr_debug("legacy perf.data format\n");
2375 return try_all_pipe_abis(hdr_sz
, ph
);
2377 return try_all_file_abis(hdr_sz
, ph
);
2380 * the new magic number serves two purposes:
2381 * - unique number to identify actual perf.data files
2382 * - encode endianness of file
2385 /* check magic number with one endianness */
2386 if (magic
== __perf_magic2
)
2389 /* check magic number with opposite endianness */
2390 if (magic
!= __perf_magic2_sw
)
2393 ph
->needs_swap
= true;
2398 int perf_file_header__read(struct perf_file_header
*header
,
2399 struct perf_header
*ph
, int fd
)
2403 lseek(fd
, 0, SEEK_SET
);
2405 ret
= readn(fd
, header
, sizeof(*header
));
2409 if (check_magic_endian(header
->magic
,
2410 header
->attr_size
, false, ph
) < 0) {
2411 pr_debug("magic/endian check failed\n");
2415 if (ph
->needs_swap
) {
2416 mem_bswap_64(header
, offsetof(struct perf_file_header
,
2420 if (header
->size
!= sizeof(*header
)) {
2421 /* Support the previous format */
2422 if (header
->size
== offsetof(typeof(*header
), adds_features
))
2423 bitmap_zero(header
->adds_features
, HEADER_FEAT_BITS
);
2426 } else if (ph
->needs_swap
) {
2428 * feature bitmap is declared as an array of unsigned longs --
2429 * not good since its size can differ between the host that
2430 * generated the data file and the host analyzing the file.
2432 * We need to handle endianness, but we don't know the size of
2433 * the unsigned long where the file was generated. Take a best
2434 * guess at determining it: try 64-bit swap first (ie., file
2435 * created on a 64-bit host), and check if the hostname feature
2436 * bit is set (this feature bit is forced on as of fbe96f2).
2437 * If the bit is not, undo the 64-bit swap and try a 32-bit
2438 * swap. If the hostname bit is still not set (e.g., older data
2439 * file), punt and fallback to the original behavior --
2440 * clearing all feature bits and setting buildid.
2442 mem_bswap_64(&header
->adds_features
,
2443 BITS_TO_U64(HEADER_FEAT_BITS
));
2445 if (!test_bit(HEADER_HOSTNAME
, header
->adds_features
)) {
2447 mem_bswap_64(&header
->adds_features
,
2448 BITS_TO_U64(HEADER_FEAT_BITS
));
2451 mem_bswap_32(&header
->adds_features
,
2452 BITS_TO_U32(HEADER_FEAT_BITS
));
2455 if (!test_bit(HEADER_HOSTNAME
, header
->adds_features
)) {
2456 bitmap_zero(header
->adds_features
, HEADER_FEAT_BITS
);
2457 set_bit(HEADER_BUILD_ID
, header
->adds_features
);
2461 memcpy(&ph
->adds_features
, &header
->adds_features
,
2462 sizeof(ph
->adds_features
));
2464 ph
->event_offset
= header
->event_types
.offset
;
2465 ph
->event_size
= header
->event_types
.size
;
2466 ph
->data_offset
= header
->data
.offset
;
2467 ph
->data_size
= header
->data
.size
;
2471 static int perf_file_section__process(struct perf_file_section
*section
,
2472 struct perf_header
*ph
,
2473 int feat
, int fd
, void *data
)
2475 if (lseek(fd
, section
->offset
, SEEK_SET
) == (off_t
)-1) {
2476 pr_debug("Failed to lseek to %" PRIu64
" offset for feature "
2477 "%d, continuing...\n", section
->offset
, feat
);
2481 if (feat
>= HEADER_LAST_FEATURE
) {
2482 pr_debug("unknown feature %d, continuing...\n", feat
);
2486 if (!feat_ops
[feat
].process
)
2489 return feat_ops
[feat
].process(section
, ph
, fd
, data
);
2492 static int perf_file_header__read_pipe(struct perf_pipe_file_header
*header
,
2493 struct perf_header
*ph
, int fd
,
2498 ret
= readn(fd
, header
, sizeof(*header
));
2502 if (check_magic_endian(header
->magic
, header
->size
, true, ph
) < 0) {
2503 pr_debug("endian/magic failed\n");
2508 header
->size
= bswap_64(header
->size
);
2510 if (repipe
&& do_write(STDOUT_FILENO
, header
, sizeof(*header
)) < 0)
2516 static int perf_header__read_pipe(struct perf_session
*session
, int fd
)
2518 struct perf_header
*header
= &session
->header
;
2519 struct perf_pipe_file_header f_header
;
2521 if (perf_file_header__read_pipe(&f_header
, header
, fd
,
2522 session
->repipe
) < 0) {
2523 pr_debug("incompatible file format\n");
2532 static int read_attr(int fd
, struct perf_header
*ph
,
2533 struct perf_file_attr
*f_attr
)
2535 struct perf_event_attr
*attr
= &f_attr
->attr
;
2537 size_t our_sz
= sizeof(f_attr
->attr
);
2540 memset(f_attr
, 0, sizeof(*f_attr
));
2542 /* read minimal guaranteed structure */
2543 ret
= readn(fd
, attr
, PERF_ATTR_SIZE_VER0
);
2545 pr_debug("cannot read %d bytes of header attr\n",
2546 PERF_ATTR_SIZE_VER0
);
2550 /* on file perf_event_attr size */
2558 sz
= PERF_ATTR_SIZE_VER0
;
2559 } else if (sz
> our_sz
) {
2560 pr_debug("file uses a more recent and unsupported ABI"
2561 " (%zu bytes extra)\n", sz
- our_sz
);
2564 /* what we have not yet read and that we know about */
2565 left
= sz
- PERF_ATTR_SIZE_VER0
;
2568 ptr
+= PERF_ATTR_SIZE_VER0
;
2570 ret
= readn(fd
, ptr
, left
);
2572 /* read perf_file_section, ids are read in caller */
2573 ret
= readn(fd
, &f_attr
->ids
, sizeof(f_attr
->ids
));
2575 return ret
<= 0 ? -1 : 0;
2578 static int perf_evsel__prepare_tracepoint_event(struct perf_evsel
*evsel
,
2579 struct pevent
*pevent
)
2581 struct event_format
*event
;
2584 /* already prepared */
2585 if (evsel
->tp_format
)
2588 event
= pevent_find_event(pevent
, evsel
->attr
.config
);
2593 snprintf(bf
, sizeof(bf
), "%s:%s", event
->system
, event
->name
);
2594 evsel
->name
= strdup(bf
);
2595 if (evsel
->name
== NULL
)
2599 evsel
->tp_format
= event
;
2603 static int perf_evlist__prepare_tracepoint_events(struct perf_evlist
*evlist
,
2604 struct pevent
*pevent
)
2606 struct perf_evsel
*pos
;
2608 list_for_each_entry(pos
, &evlist
->entries
, node
) {
2609 if (pos
->attr
.type
== PERF_TYPE_TRACEPOINT
&&
2610 perf_evsel__prepare_tracepoint_event(pos
, pevent
))
2617 int perf_session__read_header(struct perf_session
*session
, int fd
)
2619 struct perf_header
*header
= &session
->header
;
2620 struct perf_file_header f_header
;
2621 struct perf_file_attr f_attr
;
2623 int nr_attrs
, nr_ids
, i
, j
;
2625 session
->evlist
= perf_evlist__new(NULL
, NULL
);
2626 if (session
->evlist
== NULL
)
2629 if (session
->fd_pipe
)
2630 return perf_header__read_pipe(session
, fd
);
2632 if (perf_file_header__read(&f_header
, header
, fd
) < 0)
2635 nr_attrs
= f_header
.attrs
.size
/ f_header
.attr_size
;
2636 lseek(fd
, f_header
.attrs
.offset
, SEEK_SET
);
2638 for (i
= 0; i
< nr_attrs
; i
++) {
2639 struct perf_evsel
*evsel
;
2642 if (read_attr(fd
, header
, &f_attr
) < 0)
2645 if (header
->needs_swap
)
2646 perf_event__attr_swap(&f_attr
.attr
);
2648 tmp
= lseek(fd
, 0, SEEK_CUR
);
2649 evsel
= perf_evsel__new(&f_attr
.attr
, i
);
2652 goto out_delete_evlist
;
2654 evsel
->needs_swap
= header
->needs_swap
;
2656 * Do it before so that if perf_evsel__alloc_id fails, this
2657 * entry gets purged too at perf_evlist__delete().
2659 perf_evlist__add(session
->evlist
, evsel
);
2661 nr_ids
= f_attr
.ids
.size
/ sizeof(u64
);
2663 * We don't have the cpu and thread maps on the header, so
2664 * for allocating the perf_sample_id table we fake 1 cpu and
2665 * hattr->ids threads.
2667 if (perf_evsel__alloc_id(evsel
, 1, nr_ids
))
2668 goto out_delete_evlist
;
2670 lseek(fd
, f_attr
.ids
.offset
, SEEK_SET
);
2672 for (j
= 0; j
< nr_ids
; j
++) {
2673 if (perf_header__getbuffer64(header
, fd
, &f_id
, sizeof(f_id
)))
2676 perf_evlist__id_add(session
->evlist
, evsel
, 0, j
, f_id
);
2679 lseek(fd
, tmp
, SEEK_SET
);
2682 symbol_conf
.nr_events
= nr_attrs
;
2684 if (f_header
.event_types
.size
) {
2685 lseek(fd
, f_header
.event_types
.offset
, SEEK_SET
);
2686 trace_events
= malloc(f_header
.event_types
.size
);
2687 if (trace_events
== NULL
)
2689 if (perf_header__getbuffer64(header
, fd
, trace_events
,
2690 f_header
.event_types
.size
))
2692 trace_event_count
= f_header
.event_types
.size
/ sizeof(struct perf_trace_event_type
);
2695 perf_header__process_sections(header
, fd
, &session
->pevent
,
2696 perf_file_section__process
);
2698 lseek(fd
, header
->data_offset
, SEEK_SET
);
2700 if (perf_evlist__prepare_tracepoint_events(session
->evlist
,
2702 goto out_delete_evlist
;
2710 perf_evlist__delete(session
->evlist
);
2711 session
->evlist
= NULL
;
2715 int perf_event__synthesize_attr(struct perf_tool
*tool
,
2716 struct perf_event_attr
*attr
, u32 ids
, u64
*id
,
2717 perf_event__handler_t process
)
2719 union perf_event
*ev
;
2723 size
= sizeof(struct perf_event_attr
);
2724 size
= PERF_ALIGN(size
, sizeof(u64
));
2725 size
+= sizeof(struct perf_event_header
);
2726 size
+= ids
* sizeof(u64
);
2733 ev
->attr
.attr
= *attr
;
2734 memcpy(ev
->attr
.id
, id
, ids
* sizeof(u64
));
2736 ev
->attr
.header
.type
= PERF_RECORD_HEADER_ATTR
;
2737 ev
->attr
.header
.size
= (u16
)size
;
2739 if (ev
->attr
.header
.size
== size
)
2740 err
= process(tool
, ev
, NULL
, NULL
);
2749 int perf_event__synthesize_attrs(struct perf_tool
*tool
,
2750 struct perf_session
*session
,
2751 perf_event__handler_t process
)
2753 struct perf_evsel
*evsel
;
2756 list_for_each_entry(evsel
, &session
->evlist
->entries
, node
) {
2757 err
= perf_event__synthesize_attr(tool
, &evsel
->attr
, evsel
->ids
,
2758 evsel
->id
, process
);
2760 pr_debug("failed to create perf header attribute\n");
2768 int perf_event__process_attr(union perf_event
*event
,
2769 struct perf_evlist
**pevlist
)
2772 struct perf_evsel
*evsel
;
2773 struct perf_evlist
*evlist
= *pevlist
;
2775 if (evlist
== NULL
) {
2776 *pevlist
= evlist
= perf_evlist__new(NULL
, NULL
);
2781 evsel
= perf_evsel__new(&event
->attr
.attr
, evlist
->nr_entries
);
2785 perf_evlist__add(evlist
, evsel
);
2787 ids
= event
->header
.size
;
2788 ids
-= (void *)&event
->attr
.id
- (void *)event
;
2789 n_ids
= ids
/ sizeof(u64
);
2791 * We don't have the cpu and thread maps on the header, so
2792 * for allocating the perf_sample_id table we fake 1 cpu and
2793 * hattr->ids threads.
2795 if (perf_evsel__alloc_id(evsel
, 1, n_ids
))
2798 for (i
= 0; i
< n_ids
; i
++) {
2799 perf_evlist__id_add(evlist
, evsel
, 0, i
, event
->attr
.id
[i
]);
2805 int perf_event__synthesize_event_type(struct perf_tool
*tool
,
2806 u64 event_id
, char *name
,
2807 perf_event__handler_t process
,
2808 struct machine
*machine
)
2810 union perf_event ev
;
2814 memset(&ev
, 0, sizeof(ev
));
2816 ev
.event_type
.event_type
.event_id
= event_id
;
2817 memset(ev
.event_type
.event_type
.name
, 0, MAX_EVENT_NAME
);
2818 strncpy(ev
.event_type
.event_type
.name
, name
, MAX_EVENT_NAME
- 1);
2820 ev
.event_type
.header
.type
= PERF_RECORD_HEADER_EVENT_TYPE
;
2821 size
= strlen(ev
.event_type
.event_type
.name
);
2822 size
= PERF_ALIGN(size
, sizeof(u64
));
2823 ev
.event_type
.header
.size
= sizeof(ev
.event_type
) -
2824 (sizeof(ev
.event_type
.event_type
.name
) - size
);
2826 err
= process(tool
, &ev
, NULL
, machine
);
2831 int perf_event__synthesize_event_types(struct perf_tool
*tool
,
2832 perf_event__handler_t process
,
2833 struct machine
*machine
)
2835 struct perf_trace_event_type
*type
;
2838 for (i
= 0; i
< trace_event_count
; i
++) {
2839 type
= &trace_events
[i
];
2841 err
= perf_event__synthesize_event_type(tool
, type
->event_id
,
2842 type
->name
, process
,
2845 pr_debug("failed to create perf header event type\n");
2853 int perf_event__process_event_type(struct perf_tool
*tool __maybe_unused
,
2854 union perf_event
*event
)
2856 if (perf_header__push_event(event
->event_type
.event_type
.event_id
,
2857 event
->event_type
.event_type
.name
) < 0)
2863 int perf_event__synthesize_tracing_data(struct perf_tool
*tool
, int fd
,
2864 struct perf_evlist
*evlist
,
2865 perf_event__handler_t process
)
2867 union perf_event ev
;
2868 struct tracing_data
*tdata
;
2869 ssize_t size
= 0, aligned_size
= 0, padding
;
2870 int err __maybe_unused
= 0;
2873 * We are going to store the size of the data followed
2874 * by the data contents. Since the fd descriptor is a pipe,
2875 * we cannot seek back to store the size of the data once
2876 * we know it. Instead we:
2878 * - write the tracing data to the temp file
2879 * - get/write the data size to pipe
2880 * - write the tracing data from the temp file
2883 tdata
= tracing_data_get(&evlist
->entries
, fd
, true);
2887 memset(&ev
, 0, sizeof(ev
));
2889 ev
.tracing_data
.header
.type
= PERF_RECORD_HEADER_TRACING_DATA
;
2891 aligned_size
= PERF_ALIGN(size
, sizeof(u64
));
2892 padding
= aligned_size
- size
;
2893 ev
.tracing_data
.header
.size
= sizeof(ev
.tracing_data
);
2894 ev
.tracing_data
.size
= aligned_size
;
2896 process(tool
, &ev
, NULL
, NULL
);
2899 * The put function will copy all the tracing data
2900 * stored in temp file to the pipe.
2902 tracing_data_put(tdata
);
2904 write_padded(fd
, NULL
, 0, padding
);
2906 return aligned_size
;
2909 int perf_event__process_tracing_data(union perf_event
*event
,
2910 struct perf_session
*session
)
2912 ssize_t size_read
, padding
, size
= event
->tracing_data
.size
;
2913 off_t offset
= lseek(session
->fd
, 0, SEEK_CUR
);
2916 /* setup for reading amidst mmap */
2917 lseek(session
->fd
, offset
+ sizeof(struct tracing_data_event
),
2920 size_read
= trace_report(session
->fd
, &session
->pevent
,
2922 padding
= PERF_ALIGN(size_read
, sizeof(u64
)) - size_read
;
2924 if (readn(session
->fd
, buf
, padding
) < 0)
2925 die("reading input file");
2926 if (session
->repipe
) {
2927 int retw
= write(STDOUT_FILENO
, buf
, padding
);
2928 if (retw
<= 0 || retw
!= padding
)
2929 die("repiping tracing data padding");
2932 if (size_read
+ padding
!= size
)
2933 die("tracing data size mismatch");
2935 perf_evlist__prepare_tracepoint_events(session
->evlist
,
2938 return size_read
+ padding
;
2941 int perf_event__synthesize_build_id(struct perf_tool
*tool
,
2942 struct dso
*pos
, u16 misc
,
2943 perf_event__handler_t process
,
2944 struct machine
*machine
)
2946 union perf_event ev
;
2953 memset(&ev
, 0, sizeof(ev
));
2955 len
= pos
->long_name_len
+ 1;
2956 len
= PERF_ALIGN(len
, NAME_ALIGN
);
2957 memcpy(&ev
.build_id
.build_id
, pos
->build_id
, sizeof(pos
->build_id
));
2958 ev
.build_id
.header
.type
= PERF_RECORD_HEADER_BUILD_ID
;
2959 ev
.build_id
.header
.misc
= misc
;
2960 ev
.build_id
.pid
= machine
->pid
;
2961 ev
.build_id
.header
.size
= sizeof(ev
.build_id
) + len
;
2962 memcpy(&ev
.build_id
.filename
, pos
->long_name
, pos
->long_name_len
);
2964 err
= process(tool
, &ev
, NULL
, machine
);
2969 int perf_event__process_build_id(struct perf_tool
*tool __maybe_unused
,
2970 union perf_event
*event
,
2971 struct perf_session
*session
)
2973 __event_process_build_id(&event
->build_id
,
2974 event
->build_id
.filename
,
2979 void disable_buildid_cache(void)
2981 no_buildid_cache
= true;