7 #include <linux/list.h>
8 #include <linux/kernel.h>
9 #include <linux/bitops.h>
10 #include <sys/utsname.h>
16 #include "trace-event.h"
27 static bool no_buildid_cache
= false;
29 static u32 header_argc
;
30 static const char **header_argv
;
34 * must be a numerical value to let the endianness
35 * determine the memory layout. That way we are able
36 * to detect endianness when reading the perf.data file
39 * we check for legacy (PERFFILE) format.
41 static const char *__perf_magic1
= "PERFFILE";
42 static const u64 __perf_magic2
= 0x32454c4946524550ULL
;
43 static const u64 __perf_magic2_sw
= 0x50455246494c4532ULL
;
45 #define PERF_MAGIC __perf_magic2
47 struct perf_file_attr
{
48 struct perf_event_attr attr
;
49 struct perf_file_section ids
;
52 void perf_header__set_feat(struct perf_header
*header
, int feat
)
54 set_bit(feat
, header
->adds_features
);
57 void perf_header__clear_feat(struct perf_header
*header
, int feat
)
59 clear_bit(feat
, header
->adds_features
);
62 bool perf_header__has_feat(const struct perf_header
*header
, int feat
)
64 return test_bit(feat
, header
->adds_features
);
67 static int do_write(int fd
, const void *buf
, size_t size
)
70 int ret
= write(fd
, buf
, size
);
84 static int write_padded(int fd
, const void *bf
, size_t count
,
87 static const char zero_buf
[NAME_ALIGN
];
88 int err
= do_write(fd
, bf
, count
);
91 err
= do_write(fd
, zero_buf
, count_aligned
- count
);
96 static int do_write_string(int fd
, const char *str
)
101 olen
= strlen(str
) + 1;
102 len
= PERF_ALIGN(olen
, NAME_ALIGN
);
104 /* write len, incl. \0 */
105 ret
= do_write(fd
, &len
, sizeof(len
));
109 return write_padded(fd
, str
, olen
, len
);
112 static char *do_read_string(int fd
, struct perf_header
*ph
)
118 sz
= readn(fd
, &len
, sizeof(len
));
119 if (sz
< (ssize_t
)sizeof(len
))
129 ret
= readn(fd
, buf
, len
);
130 if (ret
== (ssize_t
)len
) {
132 * strings are padded by zeroes
133 * thus the actual strlen of buf
134 * may be less than len
144 perf_header__set_cmdline(int argc
, const char **argv
)
149 * If header_argv has already been set, do not override it.
150 * This allows a command to set the cmdline, parse args and
151 * then call another builtin function that implements a
152 * command -- e.g, cmd_kvm calling cmd_record.
157 header_argc
= (u32
)argc
;
159 /* do not include NULL termination */
160 header_argv
= calloc(argc
, sizeof(char *));
165 * must copy argv contents because it gets moved
166 * around during option parsing
168 for (i
= 0; i
< argc
; i
++)
169 header_argv
[i
] = argv
[i
];
174 #define dsos__for_each_with_build_id(pos, head) \
175 list_for_each_entry(pos, head, node) \
176 if (!pos->has_build_id) \
180 static int write_buildid(char *name
, size_t name_len
, u8
*build_id
,
181 pid_t pid
, u16 misc
, int fd
)
184 struct build_id_event b
;
188 len
= PERF_ALIGN(len
, NAME_ALIGN
);
190 memset(&b
, 0, sizeof(b
));
191 memcpy(&b
.build_id
, build_id
, BUILD_ID_SIZE
);
193 b
.header
.misc
= misc
;
194 b
.header
.size
= sizeof(b
) + len
;
196 err
= do_write(fd
, &b
, sizeof(b
));
200 return write_padded(fd
, name
, name_len
+ 1, len
);
203 static int __dsos__write_buildid_table(struct list_head
*head
,
204 struct machine
*machine
,
205 pid_t pid
, u16 misc
, int fd
)
210 dsos__for_each_with_build_id(pos
, head
) {
218 if (is_vdso_map(pos
->short_name
)) {
219 name
= (char *) VDSO__MAP_NAME
;
220 name_len
= sizeof(VDSO__MAP_NAME
) + 1;
221 } else if (dso__is_kcore(pos
)) {
222 machine__mmap_name(machine
, nm
, sizeof(nm
));
224 name_len
= strlen(nm
) + 1;
226 name
= pos
->long_name
;
227 name_len
= pos
->long_name_len
+ 1;
230 err
= write_buildid(name
, name_len
, pos
->build_id
,
239 static int machine__write_buildid_table(struct machine
*machine
, int fd
)
242 u16 kmisc
= PERF_RECORD_MISC_KERNEL
,
243 umisc
= PERF_RECORD_MISC_USER
;
245 if (!machine__is_host(machine
)) {
246 kmisc
= PERF_RECORD_MISC_GUEST_KERNEL
;
247 umisc
= PERF_RECORD_MISC_GUEST_USER
;
250 err
= __dsos__write_buildid_table(&machine
->kernel_dsos
, machine
,
251 machine
->pid
, kmisc
, fd
);
253 err
= __dsos__write_buildid_table(&machine
->user_dsos
, machine
,
254 machine
->pid
, umisc
, fd
);
258 static int dsos__write_buildid_table(struct perf_header
*header
, int fd
)
260 struct perf_session
*session
= container_of(header
,
261 struct perf_session
, header
);
263 int err
= machine__write_buildid_table(&session
->machines
.host
, fd
);
268 for (nd
= rb_first(&session
->machines
.guests
); nd
; nd
= rb_next(nd
)) {
269 struct machine
*pos
= rb_entry(nd
, struct machine
, rb_node
);
270 err
= machine__write_buildid_table(pos
, fd
);
277 int build_id_cache__add_s(const char *sbuild_id
, const char *debugdir
,
278 const char *name
, bool is_kallsyms
, bool is_vdso
)
280 const size_t size
= PATH_MAX
;
281 char *realname
, *filename
= zalloc(size
),
282 *linkname
= zalloc(size
), *targetname
;
284 bool slash
= is_kallsyms
|| is_vdso
;
287 if (symbol_conf
.kptr_restrict
) {
288 pr_debug("Not caching a kptr_restrict'ed /proc/kallsyms\n");
292 realname
= (char *) name
;
294 realname
= realpath(name
, NULL
);
296 if (realname
== NULL
|| filename
== NULL
|| linkname
== NULL
)
299 len
= scnprintf(filename
, size
, "%s%s%s",
300 debugdir
, slash
? "/" : "",
301 is_vdso
? VDSO__MAP_NAME
: realname
);
302 if (mkdir_p(filename
, 0755))
305 snprintf(filename
+ len
, size
- len
, "/%s", sbuild_id
);
307 if (access(filename
, F_OK
)) {
309 if (copyfile("/proc/kallsyms", filename
))
311 } else if (link(realname
, filename
) && copyfile(name
, filename
))
315 len
= scnprintf(linkname
, size
, "%s/.build-id/%.2s",
316 debugdir
, sbuild_id
);
318 if (access(linkname
, X_OK
) && mkdir_p(linkname
, 0755))
321 snprintf(linkname
+ len
, size
- len
, "/%s", sbuild_id
+ 2);
322 targetname
= filename
+ strlen(debugdir
) - 5;
323 memcpy(targetname
, "../..", 5);
325 if (symlink(targetname
, linkname
) == 0)
335 static int build_id_cache__add_b(const u8
*build_id
, size_t build_id_size
,
336 const char *name
, const char *debugdir
,
337 bool is_kallsyms
, bool is_vdso
)
339 char sbuild_id
[BUILD_ID_SIZE
* 2 + 1];
341 build_id__sprintf(build_id
, build_id_size
, sbuild_id
);
343 return build_id_cache__add_s(sbuild_id
, debugdir
, name
,
344 is_kallsyms
, is_vdso
);
347 int build_id_cache__remove_s(const char *sbuild_id
, const char *debugdir
)
349 const size_t size
= PATH_MAX
;
350 char *filename
= zalloc(size
),
351 *linkname
= zalloc(size
);
354 if (filename
== NULL
|| linkname
== NULL
)
357 snprintf(linkname
, size
, "%s/.build-id/%.2s/%s",
358 debugdir
, sbuild_id
, sbuild_id
+ 2);
360 if (access(linkname
, F_OK
))
363 if (readlink(linkname
, filename
, size
- 1) < 0)
366 if (unlink(linkname
))
370 * Since the link is relative, we must make it absolute:
372 snprintf(linkname
, size
, "%s/.build-id/%.2s/%s",
373 debugdir
, sbuild_id
, filename
);
375 if (unlink(linkname
))
385 static int dso__cache_build_id(struct dso
*dso
, struct machine
*machine
,
386 const char *debugdir
)
388 bool is_kallsyms
= dso
->kernel
&& dso
->long_name
[0] != '/';
389 bool is_vdso
= is_vdso_map(dso
->short_name
);
390 char *name
= dso
->long_name
;
393 if (dso__is_kcore(dso
)) {
395 machine__mmap_name(machine
, nm
, sizeof(nm
));
398 return build_id_cache__add_b(dso
->build_id
, sizeof(dso
->build_id
), name
,
399 debugdir
, is_kallsyms
, is_vdso
);
402 static int __dsos__cache_build_ids(struct list_head
*head
,
403 struct machine
*machine
, const char *debugdir
)
408 dsos__for_each_with_build_id(pos
, head
)
409 if (dso__cache_build_id(pos
, machine
, debugdir
))
415 static int machine__cache_build_ids(struct machine
*machine
, const char *debugdir
)
417 int ret
= __dsos__cache_build_ids(&machine
->kernel_dsos
, machine
,
419 ret
|= __dsos__cache_build_ids(&machine
->user_dsos
, machine
, debugdir
);
423 static int perf_session__cache_build_ids(struct perf_session
*session
)
427 char debugdir
[PATH_MAX
];
429 snprintf(debugdir
, sizeof(debugdir
), "%s", buildid_dir
);
431 if (mkdir(debugdir
, 0755) != 0 && errno
!= EEXIST
)
434 ret
= machine__cache_build_ids(&session
->machines
.host
, debugdir
);
436 for (nd
= rb_first(&session
->machines
.guests
); nd
; nd
= rb_next(nd
)) {
437 struct machine
*pos
= rb_entry(nd
, struct machine
, rb_node
);
438 ret
|= machine__cache_build_ids(pos
, debugdir
);
443 static bool machine__read_build_ids(struct machine
*machine
, bool with_hits
)
445 bool ret
= __dsos__read_build_ids(&machine
->kernel_dsos
, with_hits
);
446 ret
|= __dsos__read_build_ids(&machine
->user_dsos
, with_hits
);
450 static bool perf_session__read_build_ids(struct perf_session
*session
, bool with_hits
)
453 bool ret
= machine__read_build_ids(&session
->machines
.host
, with_hits
);
455 for (nd
= rb_first(&session
->machines
.guests
); nd
; nd
= rb_next(nd
)) {
456 struct machine
*pos
= rb_entry(nd
, struct machine
, rb_node
);
457 ret
|= machine__read_build_ids(pos
, with_hits
);
463 static int write_tracing_data(int fd
, struct perf_header
*h __maybe_unused
,
464 struct perf_evlist
*evlist
)
466 return read_tracing_data(fd
, &evlist
->entries
);
470 static int write_build_id(int fd
, struct perf_header
*h
,
471 struct perf_evlist
*evlist __maybe_unused
)
473 struct perf_session
*session
;
476 session
= container_of(h
, struct perf_session
, header
);
478 if (!perf_session__read_build_ids(session
, true))
481 err
= dsos__write_buildid_table(h
, fd
);
483 pr_debug("failed to write buildid table\n");
486 if (!no_buildid_cache
)
487 perf_session__cache_build_ids(session
);
492 static int write_hostname(int fd
, struct perf_header
*h __maybe_unused
,
493 struct perf_evlist
*evlist __maybe_unused
)
502 return do_write_string(fd
, uts
.nodename
);
505 static int write_osrelease(int fd
, struct perf_header
*h __maybe_unused
,
506 struct perf_evlist
*evlist __maybe_unused
)
515 return do_write_string(fd
, uts
.release
);
518 static int write_arch(int fd
, struct perf_header
*h __maybe_unused
,
519 struct perf_evlist
*evlist __maybe_unused
)
528 return do_write_string(fd
, uts
.machine
);
531 static int write_version(int fd
, struct perf_header
*h __maybe_unused
,
532 struct perf_evlist
*evlist __maybe_unused
)
534 return do_write_string(fd
, perf_version_string
);
537 static int write_cpudesc(int fd
, struct perf_header
*h __maybe_unused
,
538 struct perf_evlist
*evlist __maybe_unused
)
541 #define CPUINFO_PROC NULL
546 const char *search
= CPUINFO_PROC
;
553 file
= fopen("/proc/cpuinfo", "r");
557 while (getline(&buf
, &len
, file
) > 0) {
558 ret
= strncmp(buf
, search
, strlen(search
));
568 p
= strchr(buf
, ':');
569 if (p
&& *(p
+1) == ' ' && *(p
+2))
575 /* squash extra space characters (branding string) */
582 while (*q
&& isspace(*q
))
585 while ((*r
++ = *q
++));
589 ret
= do_write_string(fd
, s
);
596 static int write_nrcpus(int fd
, struct perf_header
*h __maybe_unused
,
597 struct perf_evlist
*evlist __maybe_unused
)
603 nr
= sysconf(_SC_NPROCESSORS_CONF
);
607 nrc
= (u32
)(nr
& UINT_MAX
);
609 nr
= sysconf(_SC_NPROCESSORS_ONLN
);
613 nra
= (u32
)(nr
& UINT_MAX
);
615 ret
= do_write(fd
, &nrc
, sizeof(nrc
));
619 return do_write(fd
, &nra
, sizeof(nra
));
622 static int write_event_desc(int fd
, struct perf_header
*h __maybe_unused
,
623 struct perf_evlist
*evlist
)
625 struct perf_evsel
*evsel
;
629 nre
= evlist
->nr_entries
;
632 * write number of events
634 ret
= do_write(fd
, &nre
, sizeof(nre
));
639 * size of perf_event_attr struct
641 sz
= (u32
)sizeof(evsel
->attr
);
642 ret
= do_write(fd
, &sz
, sizeof(sz
));
646 list_for_each_entry(evsel
, &evlist
->entries
, node
) {
648 ret
= do_write(fd
, &evsel
->attr
, sz
);
652 * write number of unique id per event
653 * there is one id per instance of an event
655 * copy into an nri to be independent of the
659 ret
= do_write(fd
, &nri
, sizeof(nri
));
664 * write event string as passed on cmdline
666 ret
= do_write_string(fd
, perf_evsel__name(evsel
));
670 * write unique ids for this event
672 ret
= do_write(fd
, evsel
->id
, evsel
->ids
* sizeof(u64
));
679 static int write_cmdline(int fd
, struct perf_header
*h __maybe_unused
,
680 struct perf_evlist
*evlist __maybe_unused
)
682 char buf
[MAXPATHLEN
];
688 * actual atual path to perf binary
690 sprintf(proc
, "/proc/%d/exe", getpid());
691 ret
= readlink(proc
, buf
, sizeof(buf
));
695 /* readlink() does not add null termination */
698 /* account for binary path */
701 ret
= do_write(fd
, &n
, sizeof(n
));
705 ret
= do_write_string(fd
, buf
);
709 for (i
= 0 ; i
< header_argc
; i
++) {
710 ret
= do_write_string(fd
, header_argv
[i
]);
717 #define CORE_SIB_FMT \
718 "/sys/devices/system/cpu/cpu%d/topology/core_siblings_list"
719 #define THRD_SIB_FMT \
720 "/sys/devices/system/cpu/cpu%d/topology/thread_siblings_list"
725 char **core_siblings
;
726 char **thread_siblings
;
729 static int build_cpu_topo(struct cpu_topo
*tp
, int cpu
)
732 char filename
[MAXPATHLEN
];
733 char *buf
= NULL
, *p
;
739 sprintf(filename
, CORE_SIB_FMT
, cpu
);
740 fp
= fopen(filename
, "r");
744 sret
= getline(&buf
, &len
, fp
);
749 p
= strchr(buf
, '\n');
753 for (i
= 0; i
< tp
->core_sib
; i
++) {
754 if (!strcmp(buf
, tp
->core_siblings
[i
]))
757 if (i
== tp
->core_sib
) {
758 tp
->core_siblings
[i
] = buf
;
766 sprintf(filename
, THRD_SIB_FMT
, cpu
);
767 fp
= fopen(filename
, "r");
771 if (getline(&buf
, &len
, fp
) <= 0)
774 p
= strchr(buf
, '\n');
778 for (i
= 0; i
< tp
->thread_sib
; i
++) {
779 if (!strcmp(buf
, tp
->thread_siblings
[i
]))
782 if (i
== tp
->thread_sib
) {
783 tp
->thread_siblings
[i
] = buf
;
795 static void free_cpu_topo(struct cpu_topo
*tp
)
802 for (i
= 0 ; i
< tp
->core_sib
; i
++)
803 free(tp
->core_siblings
[i
]);
805 for (i
= 0 ; i
< tp
->thread_sib
; i
++)
806 free(tp
->thread_siblings
[i
]);
811 static struct cpu_topo
*build_cpu_topology(void)
820 ncpus
= sysconf(_SC_NPROCESSORS_CONF
);
824 nr
= (u32
)(ncpus
& UINT_MAX
);
826 sz
= nr
* sizeof(char *);
828 addr
= calloc(1, sizeof(*tp
) + 2 * sz
);
835 tp
->core_siblings
= addr
;
837 tp
->thread_siblings
= addr
;
839 for (i
= 0; i
< nr
; i
++) {
840 ret
= build_cpu_topo(tp
, i
);
851 static int write_cpu_topology(int fd
, struct perf_header
*h __maybe_unused
,
852 struct perf_evlist
*evlist __maybe_unused
)
858 tp
= build_cpu_topology();
862 ret
= do_write(fd
, &tp
->core_sib
, sizeof(tp
->core_sib
));
866 for (i
= 0; i
< tp
->core_sib
; i
++) {
867 ret
= do_write_string(fd
, tp
->core_siblings
[i
]);
871 ret
= do_write(fd
, &tp
->thread_sib
, sizeof(tp
->thread_sib
));
875 for (i
= 0; i
< tp
->thread_sib
; i
++) {
876 ret
= do_write_string(fd
, tp
->thread_siblings
[i
]);
887 static int write_total_mem(int fd
, struct perf_header
*h __maybe_unused
,
888 struct perf_evlist
*evlist __maybe_unused
)
896 fp
= fopen("/proc/meminfo", "r");
900 while (getline(&buf
, &len
, fp
) > 0) {
901 ret
= strncmp(buf
, "MemTotal:", 9);
906 n
= sscanf(buf
, "%*s %"PRIu64
, &mem
);
908 ret
= do_write(fd
, &mem
, sizeof(mem
));
915 static int write_topo_node(int fd
, int node
)
917 char str
[MAXPATHLEN
];
919 char *buf
= NULL
, *p
;
922 u64 mem_total
, mem_free
, mem
;
925 sprintf(str
, "/sys/devices/system/node/node%d/meminfo", node
);
926 fp
= fopen(str
, "r");
930 while (getline(&buf
, &len
, fp
) > 0) {
931 /* skip over invalid lines */
932 if (!strchr(buf
, ':'))
934 if (sscanf(buf
, "%*s %*d %s %"PRIu64
, field
, &mem
) != 2)
936 if (!strcmp(field
, "MemTotal:"))
938 if (!strcmp(field
, "MemFree:"))
945 ret
= do_write(fd
, &mem_total
, sizeof(u64
));
949 ret
= do_write(fd
, &mem_free
, sizeof(u64
));
954 sprintf(str
, "/sys/devices/system/node/node%d/cpulist", node
);
956 fp
= fopen(str
, "r");
960 if (getline(&buf
, &len
, fp
) <= 0)
963 p
= strchr(buf
, '\n');
967 ret
= do_write_string(fd
, buf
);
975 static int write_numa_topology(int fd
, struct perf_header
*h __maybe_unused
,
976 struct perf_evlist
*evlist __maybe_unused
)
981 struct cpu_map
*node_map
= NULL
;
986 fp
= fopen("/sys/devices/system/node/online", "r");
990 if (getline(&buf
, &len
, fp
) <= 0)
993 c
= strchr(buf
, '\n');
997 node_map
= cpu_map__new(buf
);
1001 nr
= (u32
)node_map
->nr
;
1003 ret
= do_write(fd
, &nr
, sizeof(nr
));
1007 for (i
= 0; i
< nr
; i
++) {
1008 j
= (u32
)node_map
->map
[i
];
1009 ret
= do_write(fd
, &j
, sizeof(j
));
1013 ret
= write_topo_node(fd
, i
);
1027 * struct pmu_mappings {
1036 static int write_pmu_mappings(int fd
, struct perf_header
*h __maybe_unused
,
1037 struct perf_evlist
*evlist __maybe_unused
)
1039 struct perf_pmu
*pmu
= NULL
;
1040 off_t offset
= lseek(fd
, 0, SEEK_CUR
);
1044 /* write real pmu_num later */
1045 ret
= do_write(fd
, &pmu_num
, sizeof(pmu_num
));
1049 while ((pmu
= perf_pmu__scan(pmu
))) {
1054 ret
= do_write(fd
, &pmu
->type
, sizeof(pmu
->type
));
1058 ret
= do_write_string(fd
, pmu
->name
);
1063 if (pwrite(fd
, &pmu_num
, sizeof(pmu_num
), offset
) != sizeof(pmu_num
)) {
1065 lseek(fd
, offset
, SEEK_SET
);
1075 * struct group_descs {
1077 * struct group_desc {
1084 static int write_group_desc(int fd
, struct perf_header
*h __maybe_unused
,
1085 struct perf_evlist
*evlist
)
1087 u32 nr_groups
= evlist
->nr_groups
;
1088 struct perf_evsel
*evsel
;
1091 ret
= do_write(fd
, &nr_groups
, sizeof(nr_groups
));
1095 list_for_each_entry(evsel
, &evlist
->entries
, node
) {
1096 if (perf_evsel__is_group_leader(evsel
) &&
1097 evsel
->nr_members
> 1) {
1098 const char *name
= evsel
->group_name
?: "{anon_group}";
1099 u32 leader_idx
= evsel
->idx
;
1100 u32 nr_members
= evsel
->nr_members
;
1102 ret
= do_write_string(fd
, name
);
1106 ret
= do_write(fd
, &leader_idx
, sizeof(leader_idx
));
1110 ret
= do_write(fd
, &nr_members
, sizeof(nr_members
));
1119 * default get_cpuid(): nothing gets recorded
1120 * actual implementation must be in arch/$(ARCH)/util/header.c
1122 int __attribute__ ((weak
)) get_cpuid(char *buffer __maybe_unused
,
1123 size_t sz __maybe_unused
)
1128 static int write_cpuid(int fd
, struct perf_header
*h __maybe_unused
,
1129 struct perf_evlist
*evlist __maybe_unused
)
1134 ret
= get_cpuid(buffer
, sizeof(buffer
));
1140 return do_write_string(fd
, buffer
);
1143 static int write_branch_stack(int fd __maybe_unused
,
1144 struct perf_header
*h __maybe_unused
,
1145 struct perf_evlist
*evlist __maybe_unused
)
1150 static void print_hostname(struct perf_header
*ph
, int fd __maybe_unused
,
1153 fprintf(fp
, "# hostname : %s\n", ph
->env
.hostname
);
1156 static void print_osrelease(struct perf_header
*ph
, int fd __maybe_unused
,
1159 fprintf(fp
, "# os release : %s\n", ph
->env
.os_release
);
1162 static void print_arch(struct perf_header
*ph
, int fd __maybe_unused
, FILE *fp
)
1164 fprintf(fp
, "# arch : %s\n", ph
->env
.arch
);
1167 static void print_cpudesc(struct perf_header
*ph
, int fd __maybe_unused
,
1170 fprintf(fp
, "# cpudesc : %s\n", ph
->env
.cpu_desc
);
1173 static void print_nrcpus(struct perf_header
*ph
, int fd __maybe_unused
,
1176 fprintf(fp
, "# nrcpus online : %u\n", ph
->env
.nr_cpus_online
);
1177 fprintf(fp
, "# nrcpus avail : %u\n", ph
->env
.nr_cpus_avail
);
1180 static void print_version(struct perf_header
*ph
, int fd __maybe_unused
,
1183 fprintf(fp
, "# perf version : %s\n", ph
->env
.version
);
1186 static void print_cmdline(struct perf_header
*ph
, int fd __maybe_unused
,
1192 nr
= ph
->env
.nr_cmdline
;
1193 str
= ph
->env
.cmdline
;
1195 fprintf(fp
, "# cmdline : ");
1197 for (i
= 0; i
< nr
; i
++) {
1198 fprintf(fp
, "%s ", str
);
1199 str
+= strlen(str
) + 1;
1204 static void print_cpu_topology(struct perf_header
*ph
, int fd __maybe_unused
,
1210 nr
= ph
->env
.nr_sibling_cores
;
1211 str
= ph
->env
.sibling_cores
;
1213 for (i
= 0; i
< nr
; i
++) {
1214 fprintf(fp
, "# sibling cores : %s\n", str
);
1215 str
+= strlen(str
) + 1;
1218 nr
= ph
->env
.nr_sibling_threads
;
1219 str
= ph
->env
.sibling_threads
;
1221 for (i
= 0; i
< nr
; i
++) {
1222 fprintf(fp
, "# sibling threads : %s\n", str
);
1223 str
+= strlen(str
) + 1;
1227 static void free_event_desc(struct perf_evsel
*events
)
1229 struct perf_evsel
*evsel
;
1234 for (evsel
= events
; evsel
->attr
.size
; evsel
++) {
1244 static struct perf_evsel
*
1245 read_event_desc(struct perf_header
*ph
, int fd
)
1247 struct perf_evsel
*evsel
, *events
= NULL
;
1250 u32 nre
, sz
, nr
, i
, j
;
1254 /* number of events */
1255 ret
= readn(fd
, &nre
, sizeof(nre
));
1256 if (ret
!= (ssize_t
)sizeof(nre
))
1260 nre
= bswap_32(nre
);
1262 ret
= readn(fd
, &sz
, sizeof(sz
));
1263 if (ret
!= (ssize_t
)sizeof(sz
))
1269 /* buffer to hold on file attr struct */
1274 /* the last event terminates with evsel->attr.size == 0: */
1275 events
= calloc(nre
+ 1, sizeof(*events
));
1279 msz
= sizeof(evsel
->attr
);
1283 for (i
= 0, evsel
= events
; i
< nre
; evsel
++, i
++) {
1287 * must read entire on-file attr struct to
1288 * sync up with layout.
1290 ret
= readn(fd
, buf
, sz
);
1291 if (ret
!= (ssize_t
)sz
)
1295 perf_event__attr_swap(buf
);
1297 memcpy(&evsel
->attr
, buf
, msz
);
1299 ret
= readn(fd
, &nr
, sizeof(nr
));
1300 if (ret
!= (ssize_t
)sizeof(nr
))
1303 if (ph
->needs_swap
) {
1305 evsel
->needs_swap
= true;
1308 evsel
->name
= do_read_string(fd
, ph
);
1313 id
= calloc(nr
, sizeof(*id
));
1319 for (j
= 0 ; j
< nr
; j
++) {
1320 ret
= readn(fd
, id
, sizeof(*id
));
1321 if (ret
!= (ssize_t
)sizeof(*id
))
1324 *id
= bswap_64(*id
);
1334 free_event_desc(events
);
1339 static void print_event_desc(struct perf_header
*ph
, int fd
, FILE *fp
)
1341 struct perf_evsel
*evsel
, *events
= read_event_desc(ph
, fd
);
1346 fprintf(fp
, "# event desc: not available or unable to read\n");
1350 for (evsel
= events
; evsel
->attr
.size
; evsel
++) {
1351 fprintf(fp
, "# event : name = %s, ", evsel
->name
);
1353 fprintf(fp
, "type = %d, config = 0x%"PRIx64
1354 ", config1 = 0x%"PRIx64
", config2 = 0x%"PRIx64
,
1356 (u64
)evsel
->attr
.config
,
1357 (u64
)evsel
->attr
.config1
,
1358 (u64
)evsel
->attr
.config2
);
1360 fprintf(fp
, ", excl_usr = %d, excl_kern = %d",
1361 evsel
->attr
.exclude_user
,
1362 evsel
->attr
.exclude_kernel
);
1364 fprintf(fp
, ", excl_host = %d, excl_guest = %d",
1365 evsel
->attr
.exclude_host
,
1366 evsel
->attr
.exclude_guest
);
1368 fprintf(fp
, ", precise_ip = %d", evsel
->attr
.precise_ip
);
1370 fprintf(fp
, ", attr_mmap2 = %d", evsel
->attr
.mmap2
);
1371 fprintf(fp
, ", attr_mmap = %d", evsel
->attr
.mmap
);
1372 fprintf(fp
, ", attr_mmap_data = %d", evsel
->attr
.mmap_data
);
1374 fprintf(fp
, ", id = {");
1375 for (j
= 0, id
= evsel
->id
; j
< evsel
->ids
; j
++, id
++) {
1378 fprintf(fp
, " %"PRIu64
, *id
);
1386 free_event_desc(events
);
1389 static void print_total_mem(struct perf_header
*ph
, int fd __maybe_unused
,
1392 fprintf(fp
, "# total memory : %Lu kB\n", ph
->env
.total_mem
);
1395 static void print_numa_topology(struct perf_header
*ph
, int fd __maybe_unused
,
1400 uint64_t mem_total
, mem_free
;
1403 nr
= ph
->env
.nr_numa_nodes
;
1404 str
= ph
->env
.numa_nodes
;
1406 for (i
= 0; i
< nr
; i
++) {
1408 c
= strtoul(str
, &tmp
, 0);
1413 mem_total
= strtoull(str
, &tmp
, 0);
1418 mem_free
= strtoull(str
, &tmp
, 0);
1422 fprintf(fp
, "# node%u meminfo : total = %"PRIu64
" kB,"
1423 " free = %"PRIu64
" kB\n",
1424 c
, mem_total
, mem_free
);
1427 fprintf(fp
, "# node%u cpu list : %s\n", c
, str
);
1429 str
+= strlen(str
) + 1;
1433 fprintf(fp
, "# numa topology : not available\n");
1436 static void print_cpuid(struct perf_header
*ph
, int fd __maybe_unused
, FILE *fp
)
1438 fprintf(fp
, "# cpuid : %s\n", ph
->env
.cpuid
);
1441 static void print_branch_stack(struct perf_header
*ph __maybe_unused
,
1442 int fd __maybe_unused
, FILE *fp
)
1444 fprintf(fp
, "# contains samples with branch stack\n");
1447 static void print_pmu_mappings(struct perf_header
*ph
, int fd __maybe_unused
,
1450 const char *delimiter
= "# pmu mappings: ";
1455 pmu_num
= ph
->env
.nr_pmu_mappings
;
1457 fprintf(fp
, "# pmu mappings: not available\n");
1461 str
= ph
->env
.pmu_mappings
;
1464 type
= strtoul(str
, &tmp
, 0);
1469 fprintf(fp
, "%s%s = %" PRIu32
, delimiter
, str
, type
);
1472 str
+= strlen(str
) + 1;
1481 fprintf(fp
, "# pmu mappings: unable to read\n");
1484 static void print_group_desc(struct perf_header
*ph
, int fd __maybe_unused
,
1487 struct perf_session
*session
;
1488 struct perf_evsel
*evsel
;
1491 session
= container_of(ph
, struct perf_session
, header
);
1493 list_for_each_entry(evsel
, &session
->evlist
->entries
, node
) {
1494 if (perf_evsel__is_group_leader(evsel
) &&
1495 evsel
->nr_members
> 1) {
1496 fprintf(fp
, "# group: %s{%s", evsel
->group_name
?: "",
1497 perf_evsel__name(evsel
));
1499 nr
= evsel
->nr_members
- 1;
1501 fprintf(fp
, ",%s", perf_evsel__name(evsel
));
1509 static int __event_process_build_id(struct build_id_event
*bev
,
1511 struct perf_session
*session
)
1514 struct list_head
*head
;
1515 struct machine
*machine
;
1518 enum dso_kernel_type dso_type
;
1520 machine
= perf_session__findnew_machine(session
, bev
->pid
);
1524 misc
= bev
->header
.misc
& PERF_RECORD_MISC_CPUMODE_MASK
;
1527 case PERF_RECORD_MISC_KERNEL
:
1528 dso_type
= DSO_TYPE_KERNEL
;
1529 head
= &machine
->kernel_dsos
;
1531 case PERF_RECORD_MISC_GUEST_KERNEL
:
1532 dso_type
= DSO_TYPE_GUEST_KERNEL
;
1533 head
= &machine
->kernel_dsos
;
1535 case PERF_RECORD_MISC_USER
:
1536 case PERF_RECORD_MISC_GUEST_USER
:
1537 dso_type
= DSO_TYPE_USER
;
1538 head
= &machine
->user_dsos
;
1544 dso
= __dsos__findnew(head
, filename
);
1546 char sbuild_id
[BUILD_ID_SIZE
* 2 + 1];
1548 dso__set_build_id(dso
, &bev
->build_id
);
1550 if (filename
[0] == '[')
1551 dso
->kernel
= dso_type
;
1553 build_id__sprintf(dso
->build_id
, sizeof(dso
->build_id
),
1555 pr_debug("build id event received for %s: %s\n",
1556 dso
->long_name
, sbuild_id
);
1564 static int perf_header__read_build_ids_abi_quirk(struct perf_header
*header
,
1565 int input
, u64 offset
, u64 size
)
1567 struct perf_session
*session
= container_of(header
, struct perf_session
, header
);
1569 struct perf_event_header header
;
1570 u8 build_id
[PERF_ALIGN(BUILD_ID_SIZE
, sizeof(u64
))];
1573 struct build_id_event bev
;
1574 char filename
[PATH_MAX
];
1575 u64 limit
= offset
+ size
;
1577 while (offset
< limit
) {
1580 if (readn(input
, &old_bev
, sizeof(old_bev
)) != sizeof(old_bev
))
1583 if (header
->needs_swap
)
1584 perf_event_header__bswap(&old_bev
.header
);
1586 len
= old_bev
.header
.size
- sizeof(old_bev
);
1587 if (readn(input
, filename
, len
) != len
)
1590 bev
.header
= old_bev
.header
;
1593 * As the pid is the missing value, we need to fill
1594 * it properly. The header.misc value give us nice hint.
1596 bev
.pid
= HOST_KERNEL_ID
;
1597 if (bev
.header
.misc
== PERF_RECORD_MISC_GUEST_USER
||
1598 bev
.header
.misc
== PERF_RECORD_MISC_GUEST_KERNEL
)
1599 bev
.pid
= DEFAULT_GUEST_KERNEL_ID
;
1601 memcpy(bev
.build_id
, old_bev
.build_id
, sizeof(bev
.build_id
));
1602 __event_process_build_id(&bev
, filename
, session
);
1604 offset
+= bev
.header
.size
;
1610 static int perf_header__read_build_ids(struct perf_header
*header
,
1611 int input
, u64 offset
, u64 size
)
1613 struct perf_session
*session
= container_of(header
, struct perf_session
, header
);
1614 struct build_id_event bev
;
1615 char filename
[PATH_MAX
];
1616 u64 limit
= offset
+ size
, orig_offset
= offset
;
1619 while (offset
< limit
) {
1622 if (readn(input
, &bev
, sizeof(bev
)) != sizeof(bev
))
1625 if (header
->needs_swap
)
1626 perf_event_header__bswap(&bev
.header
);
1628 len
= bev
.header
.size
- sizeof(bev
);
1629 if (readn(input
, filename
, len
) != len
)
1632 * The a1645ce1 changeset:
1634 * "perf: 'perf kvm' tool for monitoring guest performance from host"
1636 * Added a field to struct build_id_event that broke the file
1639 * Since the kernel build-id is the first entry, process the
1640 * table using the old format if the well known
1641 * '[kernel.kallsyms]' string for the kernel build-id has the
1642 * first 4 characters chopped off (where the pid_t sits).
1644 if (memcmp(filename
, "nel.kallsyms]", 13) == 0) {
1645 if (lseek(input
, orig_offset
, SEEK_SET
) == (off_t
)-1)
1647 return perf_header__read_build_ids_abi_quirk(header
, input
, offset
, size
);
1650 __event_process_build_id(&bev
, filename
, session
);
1652 offset
+= bev
.header
.size
;
1659 static int process_tracing_data(struct perf_file_section
*section __maybe_unused
,
1660 struct perf_header
*ph __maybe_unused
,
1663 ssize_t ret
= trace_report(fd
, data
, false);
1664 return ret
< 0 ? -1 : 0;
1667 static int process_build_id(struct perf_file_section
*section
,
1668 struct perf_header
*ph
, int fd
,
1669 void *data __maybe_unused
)
1671 if (perf_header__read_build_ids(ph
, fd
, section
->offset
, section
->size
))
1672 pr_debug("Failed to read buildids, continuing...\n");
1676 static int process_hostname(struct perf_file_section
*section __maybe_unused
,
1677 struct perf_header
*ph
, int fd
,
1678 void *data __maybe_unused
)
1680 ph
->env
.hostname
= do_read_string(fd
, ph
);
1681 return ph
->env
.hostname
? 0 : -ENOMEM
;
1684 static int process_osrelease(struct perf_file_section
*section __maybe_unused
,
1685 struct perf_header
*ph
, int fd
,
1686 void *data __maybe_unused
)
1688 ph
->env
.os_release
= do_read_string(fd
, ph
);
1689 return ph
->env
.os_release
? 0 : -ENOMEM
;
1692 static int process_version(struct perf_file_section
*section __maybe_unused
,
1693 struct perf_header
*ph
, int fd
,
1694 void *data __maybe_unused
)
1696 ph
->env
.version
= do_read_string(fd
, ph
);
1697 return ph
->env
.version
? 0 : -ENOMEM
;
1700 static int process_arch(struct perf_file_section
*section __maybe_unused
,
1701 struct perf_header
*ph
, int fd
,
1702 void *data __maybe_unused
)
1704 ph
->env
.arch
= do_read_string(fd
, ph
);
1705 return ph
->env
.arch
? 0 : -ENOMEM
;
1708 static int process_nrcpus(struct perf_file_section
*section __maybe_unused
,
1709 struct perf_header
*ph
, int fd
,
1710 void *data __maybe_unused
)
1715 ret
= readn(fd
, &nr
, sizeof(nr
));
1716 if (ret
!= sizeof(nr
))
1722 ph
->env
.nr_cpus_online
= nr
;
1724 ret
= readn(fd
, &nr
, sizeof(nr
));
1725 if (ret
!= sizeof(nr
))
1731 ph
->env
.nr_cpus_avail
= nr
;
1735 static int process_cpudesc(struct perf_file_section
*section __maybe_unused
,
1736 struct perf_header
*ph
, int fd
,
1737 void *data __maybe_unused
)
1739 ph
->env
.cpu_desc
= do_read_string(fd
, ph
);
1740 return ph
->env
.cpu_desc
? 0 : -ENOMEM
;
1743 static int process_cpuid(struct perf_file_section
*section __maybe_unused
,
1744 struct perf_header
*ph
, int fd
,
1745 void *data __maybe_unused
)
1747 ph
->env
.cpuid
= do_read_string(fd
, ph
);
1748 return ph
->env
.cpuid
? 0 : -ENOMEM
;
1751 static int process_total_mem(struct perf_file_section
*section __maybe_unused
,
1752 struct perf_header
*ph
, int fd
,
1753 void *data __maybe_unused
)
1758 ret
= readn(fd
, &mem
, sizeof(mem
));
1759 if (ret
!= sizeof(mem
))
1763 mem
= bswap_64(mem
);
1765 ph
->env
.total_mem
= mem
;
1769 static struct perf_evsel
*
1770 perf_evlist__find_by_index(struct perf_evlist
*evlist
, int idx
)
1772 struct perf_evsel
*evsel
;
1774 list_for_each_entry(evsel
, &evlist
->entries
, node
) {
1775 if (evsel
->idx
== idx
)
1783 perf_evlist__set_event_name(struct perf_evlist
*evlist
,
1784 struct perf_evsel
*event
)
1786 struct perf_evsel
*evsel
;
1791 evsel
= perf_evlist__find_by_index(evlist
, event
->idx
);
1798 evsel
->name
= strdup(event
->name
);
1802 process_event_desc(struct perf_file_section
*section __maybe_unused
,
1803 struct perf_header
*header
, int fd
,
1804 void *data __maybe_unused
)
1806 struct perf_session
*session
;
1807 struct perf_evsel
*evsel
, *events
= read_event_desc(header
, fd
);
1812 session
= container_of(header
, struct perf_session
, header
);
1813 for (evsel
= events
; evsel
->attr
.size
; evsel
++)
1814 perf_evlist__set_event_name(session
->evlist
, evsel
);
1816 free_event_desc(events
);
1821 static int process_cmdline(struct perf_file_section
*section __maybe_unused
,
1822 struct perf_header
*ph
, int fd
,
1823 void *data __maybe_unused
)
1830 ret
= readn(fd
, &nr
, sizeof(nr
));
1831 if (ret
!= sizeof(nr
))
1837 ph
->env
.nr_cmdline
= nr
;
1838 strbuf_init(&sb
, 128);
1840 for (i
= 0; i
< nr
; i
++) {
1841 str
= do_read_string(fd
, ph
);
1845 /* include a NULL character at the end */
1846 strbuf_add(&sb
, str
, strlen(str
) + 1);
1849 ph
->env
.cmdline
= strbuf_detach(&sb
, NULL
);
1853 strbuf_release(&sb
);
1857 static int process_cpu_topology(struct perf_file_section
*section __maybe_unused
,
1858 struct perf_header
*ph
, int fd
,
1859 void *data __maybe_unused
)
1866 ret
= readn(fd
, &nr
, sizeof(nr
));
1867 if (ret
!= sizeof(nr
))
1873 ph
->env
.nr_sibling_cores
= nr
;
1874 strbuf_init(&sb
, 128);
1876 for (i
= 0; i
< nr
; i
++) {
1877 str
= do_read_string(fd
, ph
);
1881 /* include a NULL character at the end */
1882 strbuf_add(&sb
, str
, strlen(str
) + 1);
1885 ph
->env
.sibling_cores
= strbuf_detach(&sb
, NULL
);
1887 ret
= readn(fd
, &nr
, sizeof(nr
));
1888 if (ret
!= sizeof(nr
))
1894 ph
->env
.nr_sibling_threads
= nr
;
1896 for (i
= 0; i
< nr
; i
++) {
1897 str
= do_read_string(fd
, ph
);
1901 /* include a NULL character at the end */
1902 strbuf_add(&sb
, str
, strlen(str
) + 1);
1905 ph
->env
.sibling_threads
= strbuf_detach(&sb
, NULL
);
1909 strbuf_release(&sb
);
1913 static int process_numa_topology(struct perf_file_section
*section __maybe_unused
,
1914 struct perf_header
*ph
, int fd
,
1915 void *data __maybe_unused
)
1920 uint64_t mem_total
, mem_free
;
1924 ret
= readn(fd
, &nr
, sizeof(nr
));
1925 if (ret
!= sizeof(nr
))
1931 ph
->env
.nr_numa_nodes
= nr
;
1932 strbuf_init(&sb
, 256);
1934 for (i
= 0; i
< nr
; i
++) {
1936 ret
= readn(fd
, &node
, sizeof(node
));
1937 if (ret
!= sizeof(node
))
1940 ret
= readn(fd
, &mem_total
, sizeof(u64
));
1941 if (ret
!= sizeof(u64
))
1944 ret
= readn(fd
, &mem_free
, sizeof(u64
));
1945 if (ret
!= sizeof(u64
))
1948 if (ph
->needs_swap
) {
1949 node
= bswap_32(node
);
1950 mem_total
= bswap_64(mem_total
);
1951 mem_free
= bswap_64(mem_free
);
1954 strbuf_addf(&sb
, "%u:%"PRIu64
":%"PRIu64
":",
1955 node
, mem_total
, mem_free
);
1957 str
= do_read_string(fd
, ph
);
1961 /* include a NULL character at the end */
1962 strbuf_add(&sb
, str
, strlen(str
) + 1);
1965 ph
->env
.numa_nodes
= strbuf_detach(&sb
, NULL
);
1969 strbuf_release(&sb
);
1973 static int process_pmu_mappings(struct perf_file_section
*section __maybe_unused
,
1974 struct perf_header
*ph
, int fd
,
1975 void *data __maybe_unused
)
1983 ret
= readn(fd
, &pmu_num
, sizeof(pmu_num
));
1984 if (ret
!= sizeof(pmu_num
))
1988 pmu_num
= bswap_32(pmu_num
);
1991 pr_debug("pmu mappings not available\n");
1995 ph
->env
.nr_pmu_mappings
= pmu_num
;
1996 strbuf_init(&sb
, 128);
1999 if (readn(fd
, &type
, sizeof(type
)) != sizeof(type
))
2002 type
= bswap_32(type
);
2004 name
= do_read_string(fd
, ph
);
2008 strbuf_addf(&sb
, "%u:%s", type
, name
);
2009 /* include a NULL character at the end */
2010 strbuf_add(&sb
, "", 1);
2015 ph
->env
.pmu_mappings
= strbuf_detach(&sb
, NULL
);
2019 strbuf_release(&sb
);
2023 static int process_group_desc(struct perf_file_section
*section __maybe_unused
,
2024 struct perf_header
*ph
, int fd
,
2025 void *data __maybe_unused
)
2028 u32 i
, nr
, nr_groups
;
2029 struct perf_session
*session
;
2030 struct perf_evsel
*evsel
, *leader
= NULL
;
2037 if (readn(fd
, &nr_groups
, sizeof(nr_groups
)) != sizeof(nr_groups
))
2041 nr_groups
= bswap_32(nr_groups
);
2043 ph
->env
.nr_groups
= nr_groups
;
2045 pr_debug("group desc not available\n");
2049 desc
= calloc(nr_groups
, sizeof(*desc
));
2053 for (i
= 0; i
< nr_groups
; i
++) {
2054 desc
[i
].name
= do_read_string(fd
, ph
);
2058 if (readn(fd
, &desc
[i
].leader_idx
, sizeof(u32
)) != sizeof(u32
))
2061 if (readn(fd
, &desc
[i
].nr_members
, sizeof(u32
)) != sizeof(u32
))
2064 if (ph
->needs_swap
) {
2065 desc
[i
].leader_idx
= bswap_32(desc
[i
].leader_idx
);
2066 desc
[i
].nr_members
= bswap_32(desc
[i
].nr_members
);
2071 * Rebuild group relationship based on the group_desc
2073 session
= container_of(ph
, struct perf_session
, header
);
2074 session
->evlist
->nr_groups
= nr_groups
;
2077 list_for_each_entry(evsel
, &session
->evlist
->entries
, node
) {
2078 if (evsel
->idx
== (int) desc
[i
].leader_idx
) {
2079 evsel
->leader
= evsel
;
2080 /* {anon_group} is a dummy name */
2081 if (strcmp(desc
[i
].name
, "{anon_group}"))
2082 evsel
->group_name
= desc
[i
].name
;
2083 evsel
->nr_members
= desc
[i
].nr_members
;
2085 if (i
>= nr_groups
|| nr
> 0) {
2086 pr_debug("invalid group desc\n");
2091 nr
= evsel
->nr_members
- 1;
2094 /* This is a group member */
2095 evsel
->leader
= leader
;
2101 if (i
!= nr_groups
|| nr
!= 0) {
2102 pr_debug("invalid group desc\n");
2108 while ((int) --i
>= 0)
2115 struct feature_ops
{
2116 int (*write
)(int fd
, struct perf_header
*h
, struct perf_evlist
*evlist
);
2117 void (*print
)(struct perf_header
*h
, int fd
, FILE *fp
);
2118 int (*process
)(struct perf_file_section
*section
,
2119 struct perf_header
*h
, int fd
, void *data
);
2124 #define FEAT_OPA(n, func) \
2125 [n] = { .name = #n, .write = write_##func, .print = print_##func }
2126 #define FEAT_OPP(n, func) \
2127 [n] = { .name = #n, .write = write_##func, .print = print_##func, \
2128 .process = process_##func }
2129 #define FEAT_OPF(n, func) \
2130 [n] = { .name = #n, .write = write_##func, .print = print_##func, \
2131 .process = process_##func, .full_only = true }
2133 /* feature_ops not implemented: */
2134 #define print_tracing_data NULL
2135 #define print_build_id NULL
2137 static const struct feature_ops feat_ops
[HEADER_LAST_FEATURE
] = {
2138 FEAT_OPP(HEADER_TRACING_DATA
, tracing_data
),
2139 FEAT_OPP(HEADER_BUILD_ID
, build_id
),
2140 FEAT_OPP(HEADER_HOSTNAME
, hostname
),
2141 FEAT_OPP(HEADER_OSRELEASE
, osrelease
),
2142 FEAT_OPP(HEADER_VERSION
, version
),
2143 FEAT_OPP(HEADER_ARCH
, arch
),
2144 FEAT_OPP(HEADER_NRCPUS
, nrcpus
),
2145 FEAT_OPP(HEADER_CPUDESC
, cpudesc
),
2146 FEAT_OPP(HEADER_CPUID
, cpuid
),
2147 FEAT_OPP(HEADER_TOTAL_MEM
, total_mem
),
2148 FEAT_OPP(HEADER_EVENT_DESC
, event_desc
),
2149 FEAT_OPP(HEADER_CMDLINE
, cmdline
),
2150 FEAT_OPF(HEADER_CPU_TOPOLOGY
, cpu_topology
),
2151 FEAT_OPF(HEADER_NUMA_TOPOLOGY
, numa_topology
),
2152 FEAT_OPA(HEADER_BRANCH_STACK
, branch_stack
),
2153 FEAT_OPP(HEADER_PMU_MAPPINGS
, pmu_mappings
),
2154 FEAT_OPP(HEADER_GROUP_DESC
, group_desc
),
2157 struct header_print_data
{
2159 bool full
; /* extended list of headers */
2162 static int perf_file_section__fprintf_info(struct perf_file_section
*section
,
2163 struct perf_header
*ph
,
2164 int feat
, int fd
, void *data
)
2166 struct header_print_data
*hd
= data
;
2168 if (lseek(fd
, section
->offset
, SEEK_SET
) == (off_t
)-1) {
2169 pr_debug("Failed to lseek to %" PRIu64
" offset for feature "
2170 "%d, continuing...\n", section
->offset
, feat
);
2173 if (feat
>= HEADER_LAST_FEATURE
) {
2174 pr_warning("unknown feature %d\n", feat
);
2177 if (!feat_ops
[feat
].print
)
2180 if (!feat_ops
[feat
].full_only
|| hd
->full
)
2181 feat_ops
[feat
].print(ph
, fd
, hd
->fp
);
2183 fprintf(hd
->fp
, "# %s info available, use -I to display\n",
2184 feat_ops
[feat
].name
);
2189 int perf_header__fprintf_info(struct perf_session
*session
, FILE *fp
, bool full
)
2191 struct header_print_data hd
;
2192 struct perf_header
*header
= &session
->header
;
2193 int fd
= perf_data_file__fd(session
->file
);
2197 perf_header__process_sections(header
, fd
, &hd
,
2198 perf_file_section__fprintf_info
);
2202 static int do_write_feat(int fd
, struct perf_header
*h
, int type
,
2203 struct perf_file_section
**p
,
2204 struct perf_evlist
*evlist
)
2209 if (perf_header__has_feat(h
, type
)) {
2210 if (!feat_ops
[type
].write
)
2213 (*p
)->offset
= lseek(fd
, 0, SEEK_CUR
);
2215 err
= feat_ops
[type
].write(fd
, h
, evlist
);
2217 pr_debug("failed to write feature %d\n", type
);
2219 /* undo anything written */
2220 lseek(fd
, (*p
)->offset
, SEEK_SET
);
2224 (*p
)->size
= lseek(fd
, 0, SEEK_CUR
) - (*p
)->offset
;
2230 static int perf_header__adds_write(struct perf_header
*header
,
2231 struct perf_evlist
*evlist
, int fd
)
2234 struct perf_file_section
*feat_sec
, *p
;
2240 nr_sections
= bitmap_weight(header
->adds_features
, HEADER_FEAT_BITS
);
2244 feat_sec
= p
= calloc(nr_sections
, sizeof(*feat_sec
));
2245 if (feat_sec
== NULL
)
2248 sec_size
= sizeof(*feat_sec
) * nr_sections
;
2250 sec_start
= header
->feat_offset
;
2251 lseek(fd
, sec_start
+ sec_size
, SEEK_SET
);
2253 for_each_set_bit(feat
, header
->adds_features
, HEADER_FEAT_BITS
) {
2254 if (do_write_feat(fd
, header
, feat
, &p
, evlist
))
2255 perf_header__clear_feat(header
, feat
);
2258 lseek(fd
, sec_start
, SEEK_SET
);
2260 * may write more than needed due to dropped feature, but
2261 * this is okay, reader will skip the mising entries
2263 err
= do_write(fd
, feat_sec
, sec_size
);
2265 pr_debug("failed to write feature section\n");
2270 int perf_header__write_pipe(int fd
)
2272 struct perf_pipe_file_header f_header
;
2275 f_header
= (struct perf_pipe_file_header
){
2276 .magic
= PERF_MAGIC
,
2277 .size
= sizeof(f_header
),
2280 err
= do_write(fd
, &f_header
, sizeof(f_header
));
2282 pr_debug("failed to write perf pipe header\n");
2289 int perf_session__write_header(struct perf_session
*session
,
2290 struct perf_evlist
*evlist
,
2291 int fd
, bool at_exit
)
2293 struct perf_file_header f_header
;
2294 struct perf_file_attr f_attr
;
2295 struct perf_header
*header
= &session
->header
;
2296 struct perf_evsel
*evsel
;
2300 lseek(fd
, sizeof(f_header
), SEEK_SET
);
2302 list_for_each_entry(evsel
, &evlist
->entries
, node
) {
2303 evsel
->id_offset
= lseek(fd
, 0, SEEK_CUR
);
2304 err
= do_write(fd
, evsel
->id
, evsel
->ids
* sizeof(u64
));
2306 pr_debug("failed to write perf header\n");
2311 attr_offset
= lseek(fd
, 0, SEEK_CUR
);
2313 list_for_each_entry(evsel
, &evlist
->entries
, node
) {
2314 f_attr
= (struct perf_file_attr
){
2315 .attr
= evsel
->attr
,
2317 .offset
= evsel
->id_offset
,
2318 .size
= evsel
->ids
* sizeof(u64
),
2321 err
= do_write(fd
, &f_attr
, sizeof(f_attr
));
2323 pr_debug("failed to write perf header attribute\n");
2328 header
->data_offset
= lseek(fd
, 0, SEEK_CUR
);
2329 header
->feat_offset
= header
->data_offset
+ header
->data_size
;
2332 err
= perf_header__adds_write(header
, evlist
, fd
);
2337 f_header
= (struct perf_file_header
){
2338 .magic
= PERF_MAGIC
,
2339 .size
= sizeof(f_header
),
2340 .attr_size
= sizeof(f_attr
),
2342 .offset
= attr_offset
,
2343 .size
= evlist
->nr_entries
* sizeof(f_attr
),
2346 .offset
= header
->data_offset
,
2347 .size
= header
->data_size
,
2349 /* event_types is ignored, store zeros */
2352 memcpy(&f_header
.adds_features
, &header
->adds_features
, sizeof(header
->adds_features
));
2354 lseek(fd
, 0, SEEK_SET
);
2355 err
= do_write(fd
, &f_header
, sizeof(f_header
));
2357 pr_debug("failed to write perf header\n");
2360 lseek(fd
, header
->data_offset
+ header
->data_size
, SEEK_SET
);
2365 static int perf_header__getbuffer64(struct perf_header
*header
,
2366 int fd
, void *buf
, size_t size
)
2368 if (readn(fd
, buf
, size
) <= 0)
2371 if (header
->needs_swap
)
2372 mem_bswap_64(buf
, size
);
2377 int perf_header__process_sections(struct perf_header
*header
, int fd
,
2379 int (*process
)(struct perf_file_section
*section
,
2380 struct perf_header
*ph
,
2381 int feat
, int fd
, void *data
))
2383 struct perf_file_section
*feat_sec
, *sec
;
2389 nr_sections
= bitmap_weight(header
->adds_features
, HEADER_FEAT_BITS
);
2393 feat_sec
= sec
= calloc(nr_sections
, sizeof(*feat_sec
));
2397 sec_size
= sizeof(*feat_sec
) * nr_sections
;
2399 lseek(fd
, header
->feat_offset
, SEEK_SET
);
2401 err
= perf_header__getbuffer64(header
, fd
, feat_sec
, sec_size
);
2405 for_each_set_bit(feat
, header
->adds_features
, HEADER_LAST_FEATURE
) {
2406 err
= process(sec
++, header
, feat
, fd
, data
);
2416 static const int attr_file_abi_sizes
[] = {
2417 [0] = PERF_ATTR_SIZE_VER0
,
2418 [1] = PERF_ATTR_SIZE_VER1
,
2419 [2] = PERF_ATTR_SIZE_VER2
,
2420 [3] = PERF_ATTR_SIZE_VER3
,
2425 * In the legacy file format, the magic number is not used to encode endianness.
2426 * hdr_sz was used to encode endianness. But given that hdr_sz can vary based
2427 * on ABI revisions, we need to try all combinations for all endianness to
2428 * detect the endianness.
2430 static int try_all_file_abis(uint64_t hdr_sz
, struct perf_header
*ph
)
2432 uint64_t ref_size
, attr_size
;
2435 for (i
= 0 ; attr_file_abi_sizes
[i
]; i
++) {
2436 ref_size
= attr_file_abi_sizes
[i
]
2437 + sizeof(struct perf_file_section
);
2438 if (hdr_sz
!= ref_size
) {
2439 attr_size
= bswap_64(hdr_sz
);
2440 if (attr_size
!= ref_size
)
2443 ph
->needs_swap
= true;
2445 pr_debug("ABI%d perf.data file detected, need_swap=%d\n",
2450 /* could not determine endianness */
2454 #define PERF_PIPE_HDR_VER0 16
2456 static const size_t attr_pipe_abi_sizes
[] = {
2457 [0] = PERF_PIPE_HDR_VER0
,
2462 * In the legacy pipe format, there is an implicit assumption that endiannesss
2463 * between host recording the samples, and host parsing the samples is the
2464 * same. This is not always the case given that the pipe output may always be
2465 * redirected into a file and analyzed on a different machine with possibly a
2466 * different endianness and perf_event ABI revsions in the perf tool itself.
2468 static int try_all_pipe_abis(uint64_t hdr_sz
, struct perf_header
*ph
)
2473 for (i
= 0 ; attr_pipe_abi_sizes
[i
]; i
++) {
2474 if (hdr_sz
!= attr_pipe_abi_sizes
[i
]) {
2475 attr_size
= bswap_64(hdr_sz
);
2476 if (attr_size
!= hdr_sz
)
2479 ph
->needs_swap
= true;
2481 pr_debug("Pipe ABI%d perf.data file detected\n", i
);
2487 bool is_perf_magic(u64 magic
)
2489 if (!memcmp(&magic
, __perf_magic1
, sizeof(magic
))
2490 || magic
== __perf_magic2
2491 || magic
== __perf_magic2_sw
)
2497 static int check_magic_endian(u64 magic
, uint64_t hdr_sz
,
2498 bool is_pipe
, struct perf_header
*ph
)
2502 /* check for legacy format */
2503 ret
= memcmp(&magic
, __perf_magic1
, sizeof(magic
));
2505 ph
->version
= PERF_HEADER_VERSION_1
;
2506 pr_debug("legacy perf.data format\n");
2508 return try_all_pipe_abis(hdr_sz
, ph
);
2510 return try_all_file_abis(hdr_sz
, ph
);
2513 * the new magic number serves two purposes:
2514 * - unique number to identify actual perf.data files
2515 * - encode endianness of file
2518 /* check magic number with one endianness */
2519 if (magic
== __perf_magic2
)
2522 /* check magic number with opposite endianness */
2523 if (magic
!= __perf_magic2_sw
)
2526 ph
->needs_swap
= true;
2527 ph
->version
= PERF_HEADER_VERSION_2
;
2532 int perf_file_header__read(struct perf_file_header
*header
,
2533 struct perf_header
*ph
, int fd
)
2537 lseek(fd
, 0, SEEK_SET
);
2539 ret
= readn(fd
, header
, sizeof(*header
));
2543 if (check_magic_endian(header
->magic
,
2544 header
->attr_size
, false, ph
) < 0) {
2545 pr_debug("magic/endian check failed\n");
2549 if (ph
->needs_swap
) {
2550 mem_bswap_64(header
, offsetof(struct perf_file_header
,
2554 if (header
->size
!= sizeof(*header
)) {
2555 /* Support the previous format */
2556 if (header
->size
== offsetof(typeof(*header
), adds_features
))
2557 bitmap_zero(header
->adds_features
, HEADER_FEAT_BITS
);
2560 } else if (ph
->needs_swap
) {
2562 * feature bitmap is declared as an array of unsigned longs --
2563 * not good since its size can differ between the host that
2564 * generated the data file and the host analyzing the file.
2566 * We need to handle endianness, but we don't know the size of
2567 * the unsigned long where the file was generated. Take a best
2568 * guess at determining it: try 64-bit swap first (ie., file
2569 * created on a 64-bit host), and check if the hostname feature
2570 * bit is set (this feature bit is forced on as of fbe96f2).
2571 * If the bit is not, undo the 64-bit swap and try a 32-bit
2572 * swap. If the hostname bit is still not set (e.g., older data
2573 * file), punt and fallback to the original behavior --
2574 * clearing all feature bits and setting buildid.
2576 mem_bswap_64(&header
->adds_features
,
2577 BITS_TO_U64(HEADER_FEAT_BITS
));
2579 if (!test_bit(HEADER_HOSTNAME
, header
->adds_features
)) {
2581 mem_bswap_64(&header
->adds_features
,
2582 BITS_TO_U64(HEADER_FEAT_BITS
));
2585 mem_bswap_32(&header
->adds_features
,
2586 BITS_TO_U32(HEADER_FEAT_BITS
));
2589 if (!test_bit(HEADER_HOSTNAME
, header
->adds_features
)) {
2590 bitmap_zero(header
->adds_features
, HEADER_FEAT_BITS
);
2591 set_bit(HEADER_BUILD_ID
, header
->adds_features
);
2595 memcpy(&ph
->adds_features
, &header
->adds_features
,
2596 sizeof(ph
->adds_features
));
2598 ph
->data_offset
= header
->data
.offset
;
2599 ph
->data_size
= header
->data
.size
;
2600 ph
->feat_offset
= header
->data
.offset
+ header
->data
.size
;
2604 static int perf_file_section__process(struct perf_file_section
*section
,
2605 struct perf_header
*ph
,
2606 int feat
, int fd
, void *data
)
2608 if (lseek(fd
, section
->offset
, SEEK_SET
) == (off_t
)-1) {
2609 pr_debug("Failed to lseek to %" PRIu64
" offset for feature "
2610 "%d, continuing...\n", section
->offset
, feat
);
2614 if (feat
>= HEADER_LAST_FEATURE
) {
2615 pr_debug("unknown feature %d, continuing...\n", feat
);
2619 if (!feat_ops
[feat
].process
)
2622 return feat_ops
[feat
].process(section
, ph
, fd
, data
);
2625 static int perf_file_header__read_pipe(struct perf_pipe_file_header
*header
,
2626 struct perf_header
*ph
, int fd
,
2631 ret
= readn(fd
, header
, sizeof(*header
));
2635 if (check_magic_endian(header
->magic
, header
->size
, true, ph
) < 0) {
2636 pr_debug("endian/magic failed\n");
2641 header
->size
= bswap_64(header
->size
);
2643 if (repipe
&& do_write(STDOUT_FILENO
, header
, sizeof(*header
)) < 0)
2649 static int perf_header__read_pipe(struct perf_session
*session
)
2651 struct perf_header
*header
= &session
->header
;
2652 struct perf_pipe_file_header f_header
;
2654 if (perf_file_header__read_pipe(&f_header
, header
,
2655 perf_data_file__fd(session
->file
),
2656 session
->repipe
) < 0) {
2657 pr_debug("incompatible file format\n");
2664 static int read_attr(int fd
, struct perf_header
*ph
,
2665 struct perf_file_attr
*f_attr
)
2667 struct perf_event_attr
*attr
= &f_attr
->attr
;
2669 size_t our_sz
= sizeof(f_attr
->attr
);
2672 memset(f_attr
, 0, sizeof(*f_attr
));
2674 /* read minimal guaranteed structure */
2675 ret
= readn(fd
, attr
, PERF_ATTR_SIZE_VER0
);
2677 pr_debug("cannot read %d bytes of header attr\n",
2678 PERF_ATTR_SIZE_VER0
);
2682 /* on file perf_event_attr size */
2690 sz
= PERF_ATTR_SIZE_VER0
;
2691 } else if (sz
> our_sz
) {
2692 pr_debug("file uses a more recent and unsupported ABI"
2693 " (%zu bytes extra)\n", sz
- our_sz
);
2696 /* what we have not yet read and that we know about */
2697 left
= sz
- PERF_ATTR_SIZE_VER0
;
2700 ptr
+= PERF_ATTR_SIZE_VER0
;
2702 ret
= readn(fd
, ptr
, left
);
2704 /* read perf_file_section, ids are read in caller */
2705 ret
= readn(fd
, &f_attr
->ids
, sizeof(f_attr
->ids
));
2707 return ret
<= 0 ? -1 : 0;
2710 static int perf_evsel__prepare_tracepoint_event(struct perf_evsel
*evsel
,
2711 struct pevent
*pevent
)
2713 struct event_format
*event
;
2716 /* already prepared */
2717 if (evsel
->tp_format
)
2720 if (pevent
== NULL
) {
2721 pr_debug("broken or missing trace data\n");
2725 event
= pevent_find_event(pevent
, evsel
->attr
.config
);
2730 snprintf(bf
, sizeof(bf
), "%s:%s", event
->system
, event
->name
);
2731 evsel
->name
= strdup(bf
);
2732 if (evsel
->name
== NULL
)
2736 evsel
->tp_format
= event
;
2740 static int perf_evlist__prepare_tracepoint_events(struct perf_evlist
*evlist
,
2741 struct pevent
*pevent
)
2743 struct perf_evsel
*pos
;
2745 list_for_each_entry(pos
, &evlist
->entries
, node
) {
2746 if (pos
->attr
.type
== PERF_TYPE_TRACEPOINT
&&
2747 perf_evsel__prepare_tracepoint_event(pos
, pevent
))
2754 int perf_session__read_header(struct perf_session
*session
)
2756 struct perf_data_file
*file
= session
->file
;
2757 struct perf_header
*header
= &session
->header
;
2758 struct perf_file_header f_header
;
2759 struct perf_file_attr f_attr
;
2761 int nr_attrs
, nr_ids
, i
, j
;
2762 int fd
= perf_data_file__fd(file
);
2764 session
->evlist
= perf_evlist__new();
2765 if (session
->evlist
== NULL
)
2768 if (perf_data_file__is_pipe(file
))
2769 return perf_header__read_pipe(session
);
2771 if (perf_file_header__read(&f_header
, header
, fd
) < 0)
2775 * Sanity check that perf.data was written cleanly; data size is
2776 * initialized to 0 and updated only if the on_exit function is run.
2777 * If data size is still 0 then the file contains only partial
2778 * information. Just warn user and process it as much as it can.
2780 if (f_header
.data
.size
== 0) {
2781 pr_warning("WARNING: The %s file's data size field is 0 which is unexpected.\n"
2782 "Was the 'perf record' command properly terminated?\n",
2786 nr_attrs
= f_header
.attrs
.size
/ f_header
.attr_size
;
2787 lseek(fd
, f_header
.attrs
.offset
, SEEK_SET
);
2789 for (i
= 0; i
< nr_attrs
; i
++) {
2790 struct perf_evsel
*evsel
;
2793 if (read_attr(fd
, header
, &f_attr
) < 0)
2796 if (header
->needs_swap
)
2797 perf_event__attr_swap(&f_attr
.attr
);
2799 tmp
= lseek(fd
, 0, SEEK_CUR
);
2800 evsel
= perf_evsel__new(&f_attr
.attr
, i
);
2803 goto out_delete_evlist
;
2805 evsel
->needs_swap
= header
->needs_swap
;
2807 * Do it before so that if perf_evsel__alloc_id fails, this
2808 * entry gets purged too at perf_evlist__delete().
2810 perf_evlist__add(session
->evlist
, evsel
);
2812 nr_ids
= f_attr
.ids
.size
/ sizeof(u64
);
2814 * We don't have the cpu and thread maps on the header, so
2815 * for allocating the perf_sample_id table we fake 1 cpu and
2816 * hattr->ids threads.
2818 if (perf_evsel__alloc_id(evsel
, 1, nr_ids
))
2819 goto out_delete_evlist
;
2821 lseek(fd
, f_attr
.ids
.offset
, SEEK_SET
);
2823 for (j
= 0; j
< nr_ids
; j
++) {
2824 if (perf_header__getbuffer64(header
, fd
, &f_id
, sizeof(f_id
)))
2827 perf_evlist__id_add(session
->evlist
, evsel
, 0, j
, f_id
);
2830 lseek(fd
, tmp
, SEEK_SET
);
2833 symbol_conf
.nr_events
= nr_attrs
;
2835 perf_header__process_sections(header
, fd
, &session
->pevent
,
2836 perf_file_section__process
);
2838 if (perf_evlist__prepare_tracepoint_events(session
->evlist
,
2840 goto out_delete_evlist
;
2847 perf_evlist__delete(session
->evlist
);
2848 session
->evlist
= NULL
;
2852 int perf_event__synthesize_attr(struct perf_tool
*tool
,
2853 struct perf_event_attr
*attr
, u32 ids
, u64
*id
,
2854 perf_event__handler_t process
)
2856 union perf_event
*ev
;
2860 size
= sizeof(struct perf_event_attr
);
2861 size
= PERF_ALIGN(size
, sizeof(u64
));
2862 size
+= sizeof(struct perf_event_header
);
2863 size
+= ids
* sizeof(u64
);
2870 ev
->attr
.attr
= *attr
;
2871 memcpy(ev
->attr
.id
, id
, ids
* sizeof(u64
));
2873 ev
->attr
.header
.type
= PERF_RECORD_HEADER_ATTR
;
2874 ev
->attr
.header
.size
= (u16
)size
;
2876 if (ev
->attr
.header
.size
== size
)
2877 err
= process(tool
, ev
, NULL
, NULL
);
2886 int perf_event__synthesize_attrs(struct perf_tool
*tool
,
2887 struct perf_session
*session
,
2888 perf_event__handler_t process
)
2890 struct perf_evsel
*evsel
;
2893 list_for_each_entry(evsel
, &session
->evlist
->entries
, node
) {
2894 err
= perf_event__synthesize_attr(tool
, &evsel
->attr
, evsel
->ids
,
2895 evsel
->id
, process
);
2897 pr_debug("failed to create perf header attribute\n");
2905 int perf_event__process_attr(struct perf_tool
*tool __maybe_unused
,
2906 union perf_event
*event
,
2907 struct perf_evlist
**pevlist
)
2910 struct perf_evsel
*evsel
;
2911 struct perf_evlist
*evlist
= *pevlist
;
2913 if (evlist
== NULL
) {
2914 *pevlist
= evlist
= perf_evlist__new();
2919 evsel
= perf_evsel__new(&event
->attr
.attr
, evlist
->nr_entries
);
2923 perf_evlist__add(evlist
, evsel
);
2925 ids
= event
->header
.size
;
2926 ids
-= (void *)&event
->attr
.id
- (void *)event
;
2927 n_ids
= ids
/ sizeof(u64
);
2929 * We don't have the cpu and thread maps on the header, so
2930 * for allocating the perf_sample_id table we fake 1 cpu and
2931 * hattr->ids threads.
2933 if (perf_evsel__alloc_id(evsel
, 1, n_ids
))
2936 for (i
= 0; i
< n_ids
; i
++) {
2937 perf_evlist__id_add(evlist
, evsel
, 0, i
, event
->attr
.id
[i
]);
2940 symbol_conf
.nr_events
= evlist
->nr_entries
;
2945 int perf_event__synthesize_tracing_data(struct perf_tool
*tool
, int fd
,
2946 struct perf_evlist
*evlist
,
2947 perf_event__handler_t process
)
2949 union perf_event ev
;
2950 struct tracing_data
*tdata
;
2951 ssize_t size
= 0, aligned_size
= 0, padding
;
2952 int err __maybe_unused
= 0;
2955 * We are going to store the size of the data followed
2956 * by the data contents. Since the fd descriptor is a pipe,
2957 * we cannot seek back to store the size of the data once
2958 * we know it. Instead we:
2960 * - write the tracing data to the temp file
2961 * - get/write the data size to pipe
2962 * - write the tracing data from the temp file
2965 tdata
= tracing_data_get(&evlist
->entries
, fd
, true);
2969 memset(&ev
, 0, sizeof(ev
));
2971 ev
.tracing_data
.header
.type
= PERF_RECORD_HEADER_TRACING_DATA
;
2973 aligned_size
= PERF_ALIGN(size
, sizeof(u64
));
2974 padding
= aligned_size
- size
;
2975 ev
.tracing_data
.header
.size
= sizeof(ev
.tracing_data
);
2976 ev
.tracing_data
.size
= aligned_size
;
2978 process(tool
, &ev
, NULL
, NULL
);
2981 * The put function will copy all the tracing data
2982 * stored in temp file to the pipe.
2984 tracing_data_put(tdata
);
2986 write_padded(fd
, NULL
, 0, padding
);
2988 return aligned_size
;
2991 int perf_event__process_tracing_data(struct perf_tool
*tool __maybe_unused
,
2992 union perf_event
*event
,
2993 struct perf_session
*session
)
2995 ssize_t size_read
, padding
, size
= event
->tracing_data
.size
;
2996 int fd
= perf_data_file__fd(session
->file
);
2997 off_t offset
= lseek(fd
, 0, SEEK_CUR
);
3000 /* setup for reading amidst mmap */
3001 lseek(fd
, offset
+ sizeof(struct tracing_data_event
),
3004 size_read
= trace_report(fd
, &session
->pevent
,
3006 padding
= PERF_ALIGN(size_read
, sizeof(u64
)) - size_read
;
3008 if (readn(fd
, buf
, padding
) < 0) {
3009 pr_err("%s: reading input file", __func__
);
3012 if (session
->repipe
) {
3013 int retw
= write(STDOUT_FILENO
, buf
, padding
);
3014 if (retw
<= 0 || retw
!= padding
) {
3015 pr_err("%s: repiping tracing data padding", __func__
);
3020 if (size_read
+ padding
!= size
) {
3021 pr_err("%s: tracing data size mismatch", __func__
);
3025 perf_evlist__prepare_tracepoint_events(session
->evlist
,
3028 return size_read
+ padding
;
3031 int perf_event__synthesize_build_id(struct perf_tool
*tool
,
3032 struct dso
*pos
, u16 misc
,
3033 perf_event__handler_t process
,
3034 struct machine
*machine
)
3036 union perf_event ev
;
3043 memset(&ev
, 0, sizeof(ev
));
3045 len
= pos
->long_name_len
+ 1;
3046 len
= PERF_ALIGN(len
, NAME_ALIGN
);
3047 memcpy(&ev
.build_id
.build_id
, pos
->build_id
, sizeof(pos
->build_id
));
3048 ev
.build_id
.header
.type
= PERF_RECORD_HEADER_BUILD_ID
;
3049 ev
.build_id
.header
.misc
= misc
;
3050 ev
.build_id
.pid
= machine
->pid
;
3051 ev
.build_id
.header
.size
= sizeof(ev
.build_id
) + len
;
3052 memcpy(&ev
.build_id
.filename
, pos
->long_name
, pos
->long_name_len
);
3054 err
= process(tool
, &ev
, NULL
, machine
);
3059 int perf_event__process_build_id(struct perf_tool
*tool __maybe_unused
,
3060 union perf_event
*event
,
3061 struct perf_session
*session
)
3063 __event_process_build_id(&event
->build_id
,
3064 event
->build_id
.filename
,
3069 void disable_buildid_cache(void)
3071 no_buildid_cache
= true;