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"
27 static bool no_buildid_cache
= false;
29 static int trace_event_count
;
30 static struct perf_trace_event_type
*trace_events
;
32 static u32 header_argc
;
33 static const char **header_argv
;
35 int perf_header__push_event(u64 id
, const char *name
)
37 struct perf_trace_event_type
*nevents
;
39 if (strlen(name
) > MAX_EVENT_NAME
)
40 pr_warning("Event %s will be truncated\n", name
);
42 nevents
= realloc(trace_events
, (trace_event_count
+ 1) * sizeof(*trace_events
));
45 trace_events
= nevents
;
47 memset(&trace_events
[trace_event_count
], 0, sizeof(struct perf_trace_event_type
));
48 trace_events
[trace_event_count
].event_id
= id
;
49 strncpy(trace_events
[trace_event_count
].name
, name
, MAX_EVENT_NAME
- 1);
54 char *perf_header__find_event(u64 id
)
57 for (i
= 0 ; i
< trace_event_count
; i
++) {
58 if (trace_events
[i
].event_id
== id
)
59 return trace_events
[i
].name
;
66 * must be a numerical value to let the endianness
67 * determine the memory layout. That way we are able
68 * to detect endianness when reading the perf.data file
71 * we check for legacy (PERFFILE) format.
73 static const char *__perf_magic1
= "PERFFILE";
74 static const u64 __perf_magic2
= 0x32454c4946524550ULL
;
75 static const u64 __perf_magic2_sw
= 0x50455246494c4532ULL
;
77 #define PERF_MAGIC __perf_magic2
79 struct perf_file_attr
{
80 struct perf_event_attr attr
;
81 struct perf_file_section ids
;
84 void perf_header__set_feat(struct perf_header
*header
, int feat
)
86 set_bit(feat
, header
->adds_features
);
89 void perf_header__clear_feat(struct perf_header
*header
, int feat
)
91 clear_bit(feat
, header
->adds_features
);
94 bool perf_header__has_feat(const struct perf_header
*header
, int feat
)
96 return test_bit(feat
, header
->adds_features
);
99 static int do_write(int fd
, const void *buf
, size_t size
)
102 int ret
= write(fd
, buf
, size
);
114 #define NAME_ALIGN 64
116 static int write_padded(int fd
, const void *bf
, size_t count
,
117 size_t count_aligned
)
119 static const char zero_buf
[NAME_ALIGN
];
120 int err
= do_write(fd
, bf
, count
);
123 err
= do_write(fd
, zero_buf
, count_aligned
- count
);
128 static int do_write_string(int fd
, const char *str
)
133 olen
= strlen(str
) + 1;
134 len
= PERF_ALIGN(olen
, NAME_ALIGN
);
136 /* write len, incl. \0 */
137 ret
= do_write(fd
, &len
, sizeof(len
));
141 return write_padded(fd
, str
, olen
, len
);
144 static char *do_read_string(int fd
, struct perf_header
*ph
)
150 sz
= read(fd
, &len
, sizeof(len
));
151 if (sz
< (ssize_t
)sizeof(len
))
161 ret
= read(fd
, buf
, len
);
162 if (ret
== (ssize_t
)len
) {
164 * strings are padded by zeroes
165 * thus the actual strlen of buf
166 * may be less than len
176 perf_header__set_cmdline(int argc
, const char **argv
)
181 * If header_argv has already been set, do not override it.
182 * This allows a command to set the cmdline, parse args and
183 * then call another builtin function that implements a
184 * command -- e.g, cmd_kvm calling cmd_record.
189 header_argc
= (u32
)argc
;
191 /* do not include NULL termination */
192 header_argv
= calloc(argc
, sizeof(char *));
197 * must copy argv contents because it gets moved
198 * around during option parsing
200 for (i
= 0; i
< argc
; i
++)
201 header_argv
[i
] = argv
[i
];
206 #define dsos__for_each_with_build_id(pos, head) \
207 list_for_each_entry(pos, head, node) \
208 if (!pos->has_build_id) \
212 static int write_buildid(char *name
, size_t name_len
, u8
*build_id
,
213 pid_t pid
, u16 misc
, int fd
)
216 struct build_id_event b
;
220 len
= PERF_ALIGN(len
, NAME_ALIGN
);
222 memset(&b
, 0, sizeof(b
));
223 memcpy(&b
.build_id
, build_id
, BUILD_ID_SIZE
);
225 b
.header
.misc
= misc
;
226 b
.header
.size
= sizeof(b
) + len
;
228 err
= do_write(fd
, &b
, sizeof(b
));
232 return write_padded(fd
, name
, name_len
+ 1, len
);
235 static int __dsos__write_buildid_table(struct list_head
*head
, pid_t pid
,
240 dsos__for_each_with_build_id(pos
, head
) {
248 if (is_vdso_map(pos
->short_name
)) {
249 name
= (char *) VDSO__MAP_NAME
;
250 name_len
= sizeof(VDSO__MAP_NAME
) + 1;
252 name
= pos
->long_name
;
253 name_len
= pos
->long_name_len
+ 1;
256 err
= write_buildid(name
, name_len
, pos
->build_id
,
265 static int machine__write_buildid_table(struct machine
*machine
, int fd
)
268 u16 kmisc
= PERF_RECORD_MISC_KERNEL
,
269 umisc
= PERF_RECORD_MISC_USER
;
271 if (!machine__is_host(machine
)) {
272 kmisc
= PERF_RECORD_MISC_GUEST_KERNEL
;
273 umisc
= PERF_RECORD_MISC_GUEST_USER
;
276 err
= __dsos__write_buildid_table(&machine
->kernel_dsos
, machine
->pid
,
279 err
= __dsos__write_buildid_table(&machine
->user_dsos
,
280 machine
->pid
, umisc
, fd
);
284 static int dsos__write_buildid_table(struct perf_header
*header
, int fd
)
286 struct perf_session
*session
= container_of(header
,
287 struct perf_session
, header
);
289 int err
= machine__write_buildid_table(&session
->host_machine
, fd
);
294 for (nd
= rb_first(&session
->machines
); nd
; nd
= rb_next(nd
)) {
295 struct machine
*pos
= rb_entry(nd
, struct machine
, rb_node
);
296 err
= machine__write_buildid_table(pos
, fd
);
303 int build_id_cache__add_s(const char *sbuild_id
, const char *debugdir
,
304 const char *name
, bool is_kallsyms
, bool is_vdso
)
306 const size_t size
= PATH_MAX
;
307 char *realname
, *filename
= zalloc(size
),
308 *linkname
= zalloc(size
), *targetname
;
310 bool slash
= is_kallsyms
|| is_vdso
;
313 if (symbol_conf
.kptr_restrict
) {
314 pr_debug("Not caching a kptr_restrict'ed /proc/kallsyms\n");
317 realname
= (char *) name
;
319 realname
= realpath(name
, NULL
);
321 if (realname
== NULL
|| filename
== NULL
|| linkname
== NULL
)
324 len
= scnprintf(filename
, size
, "%s%s%s",
325 debugdir
, slash
? "/" : "",
326 is_vdso
? VDSO__MAP_NAME
: realname
);
327 if (mkdir_p(filename
, 0755))
330 snprintf(filename
+ len
, size
- len
, "/%s", sbuild_id
);
332 if (access(filename
, F_OK
)) {
334 if (copyfile("/proc/kallsyms", filename
))
336 } else if (link(realname
, filename
) && copyfile(name
, filename
))
340 len
= scnprintf(linkname
, size
, "%s/.build-id/%.2s",
341 debugdir
, sbuild_id
);
343 if (access(linkname
, X_OK
) && mkdir_p(linkname
, 0755))
346 snprintf(linkname
+ len
, size
- len
, "/%s", sbuild_id
+ 2);
347 targetname
= filename
+ strlen(debugdir
) - 5;
348 memcpy(targetname
, "../..", 5);
350 if (symlink(targetname
, linkname
) == 0)
360 static int build_id_cache__add_b(const u8
*build_id
, size_t build_id_size
,
361 const char *name
, const char *debugdir
,
362 bool is_kallsyms
, bool is_vdso
)
364 char sbuild_id
[BUILD_ID_SIZE
* 2 + 1];
366 build_id__sprintf(build_id
, build_id_size
, sbuild_id
);
368 return build_id_cache__add_s(sbuild_id
, debugdir
, name
,
369 is_kallsyms
, is_vdso
);
372 int build_id_cache__remove_s(const char *sbuild_id
, const char *debugdir
)
374 const size_t size
= PATH_MAX
;
375 char *filename
= zalloc(size
),
376 *linkname
= zalloc(size
);
379 if (filename
== NULL
|| linkname
== NULL
)
382 snprintf(linkname
, size
, "%s/.build-id/%.2s/%s",
383 debugdir
, sbuild_id
, sbuild_id
+ 2);
385 if (access(linkname
, F_OK
))
388 if (readlink(linkname
, filename
, size
- 1) < 0)
391 if (unlink(linkname
))
395 * Since the link is relative, we must make it absolute:
397 snprintf(linkname
, size
, "%s/.build-id/%.2s/%s",
398 debugdir
, sbuild_id
, filename
);
400 if (unlink(linkname
))
410 static int dso__cache_build_id(struct dso
*dso
, const char *debugdir
)
412 bool is_kallsyms
= dso
->kernel
&& dso
->long_name
[0] != '/';
413 bool is_vdso
= is_vdso_map(dso
->short_name
);
415 return build_id_cache__add_b(dso
->build_id
, sizeof(dso
->build_id
),
416 dso
->long_name
, debugdir
,
417 is_kallsyms
, is_vdso
);
420 static int __dsos__cache_build_ids(struct list_head
*head
, const char *debugdir
)
425 dsos__for_each_with_build_id(pos
, head
)
426 if (dso__cache_build_id(pos
, debugdir
))
432 static int machine__cache_build_ids(struct machine
*machine
, const char *debugdir
)
434 int ret
= __dsos__cache_build_ids(&machine
->kernel_dsos
, debugdir
);
435 ret
|= __dsos__cache_build_ids(&machine
->user_dsos
, debugdir
);
439 static int perf_session__cache_build_ids(struct perf_session
*session
)
443 char debugdir
[PATH_MAX
];
445 snprintf(debugdir
, sizeof(debugdir
), "%s", buildid_dir
);
447 if (mkdir(debugdir
, 0755) != 0 && errno
!= EEXIST
)
450 ret
= machine__cache_build_ids(&session
->host_machine
, debugdir
);
452 for (nd
= rb_first(&session
->machines
); nd
; nd
= rb_next(nd
)) {
453 struct machine
*pos
= rb_entry(nd
, struct machine
, rb_node
);
454 ret
|= machine__cache_build_ids(pos
, debugdir
);
459 static bool machine__read_build_ids(struct machine
*machine
, bool with_hits
)
461 bool ret
= __dsos__read_build_ids(&machine
->kernel_dsos
, with_hits
);
462 ret
|= __dsos__read_build_ids(&machine
->user_dsos
, with_hits
);
466 static bool perf_session__read_build_ids(struct perf_session
*session
, bool with_hits
)
469 bool ret
= machine__read_build_ids(&session
->host_machine
, with_hits
);
471 for (nd
= rb_first(&session
->machines
); nd
; nd
= rb_next(nd
)) {
472 struct machine
*pos
= rb_entry(nd
, struct machine
, rb_node
);
473 ret
|= machine__read_build_ids(pos
, with_hits
);
479 static int write_tracing_data(int fd
, struct perf_header
*h __maybe_unused
,
480 struct perf_evlist
*evlist
)
482 return read_tracing_data(fd
, &evlist
->entries
);
486 static int write_build_id(int fd
, struct perf_header
*h
,
487 struct perf_evlist
*evlist __maybe_unused
)
489 struct perf_session
*session
;
492 session
= container_of(h
, struct perf_session
, header
);
494 if (!perf_session__read_build_ids(session
, true))
497 err
= dsos__write_buildid_table(h
, fd
);
499 pr_debug("failed to write buildid table\n");
502 if (!no_buildid_cache
)
503 perf_session__cache_build_ids(session
);
508 static int write_hostname(int fd
, struct perf_header
*h __maybe_unused
,
509 struct perf_evlist
*evlist __maybe_unused
)
518 return do_write_string(fd
, uts
.nodename
);
521 static int write_osrelease(int fd
, struct perf_header
*h __maybe_unused
,
522 struct perf_evlist
*evlist __maybe_unused
)
531 return do_write_string(fd
, uts
.release
);
534 static int write_arch(int fd
, struct perf_header
*h __maybe_unused
,
535 struct perf_evlist
*evlist __maybe_unused
)
544 return do_write_string(fd
, uts
.machine
);
547 static int write_version(int fd
, struct perf_header
*h __maybe_unused
,
548 struct perf_evlist
*evlist __maybe_unused
)
550 return do_write_string(fd
, perf_version_string
);
553 static int write_cpudesc(int fd
, struct perf_header
*h __maybe_unused
,
554 struct perf_evlist
*evlist __maybe_unused
)
557 #define CPUINFO_PROC NULL
562 const char *search
= CPUINFO_PROC
;
569 file
= fopen("/proc/cpuinfo", "r");
573 while (getline(&buf
, &len
, file
) > 0) {
574 ret
= strncmp(buf
, search
, strlen(search
));
584 p
= strchr(buf
, ':');
585 if (p
&& *(p
+1) == ' ' && *(p
+2))
591 /* squash extra space characters (branding string) */
598 while (*q
&& isspace(*q
))
601 while ((*r
++ = *q
++));
605 ret
= do_write_string(fd
, s
);
612 static int write_nrcpus(int fd
, struct perf_header
*h __maybe_unused
,
613 struct perf_evlist
*evlist __maybe_unused
)
619 nr
= sysconf(_SC_NPROCESSORS_CONF
);
623 nrc
= (u32
)(nr
& UINT_MAX
);
625 nr
= sysconf(_SC_NPROCESSORS_ONLN
);
629 nra
= (u32
)(nr
& UINT_MAX
);
631 ret
= do_write(fd
, &nrc
, sizeof(nrc
));
635 return do_write(fd
, &nra
, sizeof(nra
));
638 static int write_event_desc(int fd
, struct perf_header
*h __maybe_unused
,
639 struct perf_evlist
*evlist
)
641 struct perf_evsel
*evsel
;
645 nre
= evlist
->nr_entries
;
648 * write number of events
650 ret
= do_write(fd
, &nre
, sizeof(nre
));
655 * size of perf_event_attr struct
657 sz
= (u32
)sizeof(evsel
->attr
);
658 ret
= do_write(fd
, &sz
, sizeof(sz
));
662 list_for_each_entry(evsel
, &evlist
->entries
, node
) {
664 ret
= do_write(fd
, &evsel
->attr
, sz
);
668 * write number of unique id per event
669 * there is one id per instance of an event
671 * copy into an nri to be independent of the
675 ret
= do_write(fd
, &nri
, sizeof(nri
));
680 * write event string as passed on cmdline
682 ret
= do_write_string(fd
, perf_evsel__name(evsel
));
686 * write unique ids for this event
688 ret
= do_write(fd
, evsel
->id
, evsel
->ids
* sizeof(u64
));
695 static int write_cmdline(int fd
, struct perf_header
*h __maybe_unused
,
696 struct perf_evlist
*evlist __maybe_unused
)
698 char buf
[MAXPATHLEN
];
704 * actual atual path to perf binary
706 sprintf(proc
, "/proc/%d/exe", getpid());
707 ret
= readlink(proc
, buf
, sizeof(buf
));
711 /* readlink() does not add null termination */
714 /* account for binary path */
717 ret
= do_write(fd
, &n
, sizeof(n
));
721 ret
= do_write_string(fd
, buf
);
725 for (i
= 0 ; i
< header_argc
; i
++) {
726 ret
= do_write_string(fd
, header_argv
[i
]);
733 #define CORE_SIB_FMT \
734 "/sys/devices/system/cpu/cpu%d/topology/core_siblings_list"
735 #define THRD_SIB_FMT \
736 "/sys/devices/system/cpu/cpu%d/topology/thread_siblings_list"
741 char **core_siblings
;
742 char **thread_siblings
;
745 static int build_cpu_topo(struct cpu_topo
*tp
, int cpu
)
748 char filename
[MAXPATHLEN
];
749 char *buf
= NULL
, *p
;
754 sprintf(filename
, CORE_SIB_FMT
, cpu
);
755 fp
= fopen(filename
, "r");
759 if (getline(&buf
, &len
, fp
) <= 0)
764 p
= strchr(buf
, '\n');
768 for (i
= 0; i
< tp
->core_sib
; i
++) {
769 if (!strcmp(buf
, tp
->core_siblings
[i
]))
772 if (i
== tp
->core_sib
) {
773 tp
->core_siblings
[i
] = buf
;
779 sprintf(filename
, THRD_SIB_FMT
, cpu
);
780 fp
= fopen(filename
, "r");
784 if (getline(&buf
, &len
, fp
) <= 0)
787 p
= strchr(buf
, '\n');
791 for (i
= 0; i
< tp
->thread_sib
; i
++) {
792 if (!strcmp(buf
, tp
->thread_siblings
[i
]))
795 if (i
== tp
->thread_sib
) {
796 tp
->thread_siblings
[i
] = buf
;
808 static void free_cpu_topo(struct cpu_topo
*tp
)
815 for (i
= 0 ; i
< tp
->core_sib
; i
++)
816 free(tp
->core_siblings
[i
]);
818 for (i
= 0 ; i
< tp
->thread_sib
; i
++)
819 free(tp
->thread_siblings
[i
]);
824 static struct cpu_topo
*build_cpu_topology(void)
833 ncpus
= sysconf(_SC_NPROCESSORS_CONF
);
837 nr
= (u32
)(ncpus
& UINT_MAX
);
839 sz
= nr
* sizeof(char *);
841 addr
= calloc(1, sizeof(*tp
) + 2 * sz
);
848 tp
->core_siblings
= addr
;
850 tp
->thread_siblings
= addr
;
852 for (i
= 0; i
< nr
; i
++) {
853 ret
= build_cpu_topo(tp
, i
);
864 static int write_cpu_topology(int fd
, struct perf_header
*h __maybe_unused
,
865 struct perf_evlist
*evlist __maybe_unused
)
871 tp
= build_cpu_topology();
875 ret
= do_write(fd
, &tp
->core_sib
, sizeof(tp
->core_sib
));
879 for (i
= 0; i
< tp
->core_sib
; i
++) {
880 ret
= do_write_string(fd
, tp
->core_siblings
[i
]);
884 ret
= do_write(fd
, &tp
->thread_sib
, sizeof(tp
->thread_sib
));
888 for (i
= 0; i
< tp
->thread_sib
; i
++) {
889 ret
= do_write_string(fd
, tp
->thread_siblings
[i
]);
900 static int write_total_mem(int fd
, struct perf_header
*h __maybe_unused
,
901 struct perf_evlist
*evlist __maybe_unused
)
909 fp
= fopen("/proc/meminfo", "r");
913 while (getline(&buf
, &len
, fp
) > 0) {
914 ret
= strncmp(buf
, "MemTotal:", 9);
919 n
= sscanf(buf
, "%*s %"PRIu64
, &mem
);
921 ret
= do_write(fd
, &mem
, sizeof(mem
));
928 static int write_topo_node(int fd
, int node
)
930 char str
[MAXPATHLEN
];
932 char *buf
= NULL
, *p
;
935 u64 mem_total
, mem_free
, mem
;
938 sprintf(str
, "/sys/devices/system/node/node%d/meminfo", node
);
939 fp
= fopen(str
, "r");
943 while (getline(&buf
, &len
, fp
) > 0) {
944 /* skip over invalid lines */
945 if (!strchr(buf
, ':'))
947 if (sscanf(buf
, "%*s %*d %s %"PRIu64
, field
, &mem
) != 2)
949 if (!strcmp(field
, "MemTotal:"))
951 if (!strcmp(field
, "MemFree:"))
957 ret
= do_write(fd
, &mem_total
, sizeof(u64
));
961 ret
= do_write(fd
, &mem_free
, sizeof(u64
));
966 sprintf(str
, "/sys/devices/system/node/node%d/cpulist", node
);
968 fp
= fopen(str
, "r");
972 if (getline(&buf
, &len
, fp
) <= 0)
975 p
= strchr(buf
, '\n');
979 ret
= do_write_string(fd
, buf
);
986 static int write_numa_topology(int fd
, struct perf_header
*h __maybe_unused
,
987 struct perf_evlist
*evlist __maybe_unused
)
992 struct cpu_map
*node_map
= NULL
;
997 fp
= fopen("/sys/devices/system/node/online", "r");
1001 if (getline(&buf
, &len
, fp
) <= 0)
1004 c
= strchr(buf
, '\n');
1008 node_map
= cpu_map__new(buf
);
1012 nr
= (u32
)node_map
->nr
;
1014 ret
= do_write(fd
, &nr
, sizeof(nr
));
1018 for (i
= 0; i
< nr
; i
++) {
1019 j
= (u32
)node_map
->map
[i
];
1020 ret
= do_write(fd
, &j
, sizeof(j
));
1024 ret
= write_topo_node(fd
, i
);
1038 * struct pmu_mappings {
1047 static int write_pmu_mappings(int fd
, struct perf_header
*h __maybe_unused
,
1048 struct perf_evlist
*evlist __maybe_unused
)
1050 struct perf_pmu
*pmu
= NULL
;
1051 off_t offset
= lseek(fd
, 0, SEEK_CUR
);
1054 /* write real pmu_num later */
1055 do_write(fd
, &pmu_num
, sizeof(pmu_num
));
1057 while ((pmu
= perf_pmu__scan(pmu
))) {
1061 do_write(fd
, &pmu
->type
, sizeof(pmu
->type
));
1062 do_write_string(fd
, pmu
->name
);
1065 if (pwrite(fd
, &pmu_num
, sizeof(pmu_num
), offset
) != sizeof(pmu_num
)) {
1067 lseek(fd
, offset
, SEEK_SET
);
1075 * default get_cpuid(): nothing gets recorded
1076 * actual implementation must be in arch/$(ARCH)/util/header.c
1078 int __attribute__ ((weak
)) get_cpuid(char *buffer __maybe_unused
,
1079 size_t sz __maybe_unused
)
1084 static int write_cpuid(int fd
, struct perf_header
*h __maybe_unused
,
1085 struct perf_evlist
*evlist __maybe_unused
)
1090 ret
= get_cpuid(buffer
, sizeof(buffer
));
1096 return do_write_string(fd
, buffer
);
1099 static int write_branch_stack(int fd __maybe_unused
,
1100 struct perf_header
*h __maybe_unused
,
1101 struct perf_evlist
*evlist __maybe_unused
)
1106 static void print_hostname(struct perf_header
*ph
, int fd __maybe_unused
,
1109 fprintf(fp
, "# hostname : %s\n", ph
->env
.hostname
);
1112 static void print_osrelease(struct perf_header
*ph
, int fd __maybe_unused
,
1115 fprintf(fp
, "# os release : %s\n", ph
->env
.os_release
);
1118 static void print_arch(struct perf_header
*ph
, int fd __maybe_unused
, FILE *fp
)
1120 fprintf(fp
, "# arch : %s\n", ph
->env
.arch
);
1123 static void print_cpudesc(struct perf_header
*ph
, int fd __maybe_unused
,
1126 fprintf(fp
, "# cpudesc : %s\n", ph
->env
.cpu_desc
);
1129 static void print_nrcpus(struct perf_header
*ph
, int fd __maybe_unused
,
1132 fprintf(fp
, "# nrcpus online : %u\n", ph
->env
.nr_cpus_online
);
1133 fprintf(fp
, "# nrcpus avail : %u\n", ph
->env
.nr_cpus_avail
);
1136 static void print_version(struct perf_header
*ph
, int fd __maybe_unused
,
1139 fprintf(fp
, "# perf version : %s\n", ph
->env
.version
);
1142 static void print_cmdline(struct perf_header
*ph
, int fd __maybe_unused
,
1148 nr
= ph
->env
.nr_cmdline
;
1149 str
= ph
->env
.cmdline
;
1151 fprintf(fp
, "# cmdline : ");
1153 for (i
= 0; i
< nr
; i
++) {
1154 fprintf(fp
, "%s ", str
);
1155 str
+= strlen(str
) + 1;
1160 static void print_cpu_topology(struct perf_header
*ph
, int fd __maybe_unused
,
1166 nr
= ph
->env
.nr_sibling_cores
;
1167 str
= ph
->env
.sibling_cores
;
1169 for (i
= 0; i
< nr
; i
++) {
1170 fprintf(fp
, "# sibling cores : %s\n", str
);
1171 str
+= strlen(str
) + 1;
1174 nr
= ph
->env
.nr_sibling_threads
;
1175 str
= ph
->env
.sibling_threads
;
1177 for (i
= 0; i
< nr
; i
++) {
1178 fprintf(fp
, "# sibling threads : %s\n", str
);
1179 str
+= strlen(str
) + 1;
1183 static void free_event_desc(struct perf_evsel
*events
)
1185 struct perf_evsel
*evsel
;
1190 for (evsel
= events
; evsel
->attr
.size
; evsel
++) {
1200 static struct perf_evsel
*
1201 read_event_desc(struct perf_header
*ph
, int fd
)
1203 struct perf_evsel
*evsel
, *events
= NULL
;
1206 u32 nre
, sz
, nr
, i
, j
;
1210 /* number of events */
1211 ret
= read(fd
, &nre
, sizeof(nre
));
1212 if (ret
!= (ssize_t
)sizeof(nre
))
1216 nre
= bswap_32(nre
);
1218 ret
= read(fd
, &sz
, sizeof(sz
));
1219 if (ret
!= (ssize_t
)sizeof(sz
))
1225 /* buffer to hold on file attr struct */
1230 /* the last event terminates with evsel->attr.size == 0: */
1231 events
= calloc(nre
+ 1, sizeof(*events
));
1235 msz
= sizeof(evsel
->attr
);
1239 for (i
= 0, evsel
= events
; i
< nre
; evsel
++, i
++) {
1243 * must read entire on-file attr struct to
1244 * sync up with layout.
1246 ret
= read(fd
, buf
, sz
);
1247 if (ret
!= (ssize_t
)sz
)
1251 perf_event__attr_swap(buf
);
1253 memcpy(&evsel
->attr
, buf
, msz
);
1255 ret
= read(fd
, &nr
, sizeof(nr
));
1256 if (ret
!= (ssize_t
)sizeof(nr
))
1259 if (ph
->needs_swap
) {
1261 evsel
->needs_swap
= true;
1264 evsel
->name
= do_read_string(fd
, ph
);
1269 id
= calloc(nr
, sizeof(*id
));
1275 for (j
= 0 ; j
< nr
; j
++) {
1276 ret
= read(fd
, id
, sizeof(*id
));
1277 if (ret
!= (ssize_t
)sizeof(*id
))
1280 *id
= bswap_64(*id
);
1290 free_event_desc(events
);
1295 static void print_event_desc(struct perf_header
*ph
, int fd
, FILE *fp
)
1297 struct perf_evsel
*evsel
, *events
= read_event_desc(ph
, fd
);
1302 fprintf(fp
, "# event desc: not available or unable to read\n");
1306 for (evsel
= events
; evsel
->attr
.size
; evsel
++) {
1307 fprintf(fp
, "# event : name = %s, ", evsel
->name
);
1309 fprintf(fp
, "type = %d, config = 0x%"PRIx64
1310 ", config1 = 0x%"PRIx64
", config2 = 0x%"PRIx64
,
1312 (u64
)evsel
->attr
.config
,
1313 (u64
)evsel
->attr
.config1
,
1314 (u64
)evsel
->attr
.config2
);
1316 fprintf(fp
, ", excl_usr = %d, excl_kern = %d",
1317 evsel
->attr
.exclude_user
,
1318 evsel
->attr
.exclude_kernel
);
1320 fprintf(fp
, ", excl_host = %d, excl_guest = %d",
1321 evsel
->attr
.exclude_host
,
1322 evsel
->attr
.exclude_guest
);
1324 fprintf(fp
, ", precise_ip = %d", evsel
->attr
.precise_ip
);
1327 fprintf(fp
, ", id = {");
1328 for (j
= 0, id
= evsel
->id
; j
< evsel
->ids
; j
++, id
++) {
1331 fprintf(fp
, " %"PRIu64
, *id
);
1339 free_event_desc(events
);
1342 static void print_total_mem(struct perf_header
*ph
, int fd __maybe_unused
,
1345 fprintf(fp
, "# total memory : %Lu kB\n", ph
->env
.total_mem
);
1348 static void print_numa_topology(struct perf_header
*ph
, int fd __maybe_unused
,
1353 uint64_t mem_total
, mem_free
;
1356 nr
= ph
->env
.nr_numa_nodes
;
1357 str
= ph
->env
.numa_nodes
;
1359 for (i
= 0; i
< nr
; i
++) {
1361 c
= strtoul(str
, &tmp
, 0);
1366 mem_total
= strtoull(str
, &tmp
, 0);
1371 mem_free
= strtoull(str
, &tmp
, 0);
1375 fprintf(fp
, "# node%u meminfo : total = %"PRIu64
" kB,"
1376 " free = %"PRIu64
" kB\n",
1377 c
, mem_total
, mem_free
);
1380 fprintf(fp
, "# node%u cpu list : %s\n", c
, str
);
1384 fprintf(fp
, "# numa topology : not available\n");
1387 static void print_cpuid(struct perf_header
*ph
, int fd __maybe_unused
, FILE *fp
)
1389 fprintf(fp
, "# cpuid : %s\n", ph
->env
.cpuid
);
1392 static void print_branch_stack(struct perf_header
*ph __maybe_unused
,
1393 int fd __maybe_unused
, FILE *fp
)
1395 fprintf(fp
, "# contains samples with branch stack\n");
1398 static void print_pmu_mappings(struct perf_header
*ph
, int fd __maybe_unused
,
1401 const char *delimiter
= "# pmu mappings: ";
1406 pmu_num
= ph
->env
.nr_pmu_mappings
;
1408 fprintf(fp
, "# pmu mappings: not available\n");
1412 str
= ph
->env
.pmu_mappings
;
1415 type
= strtoul(str
, &tmp
, 0);
1420 fprintf(fp
, "%s%s = %" PRIu32
, delimiter
, str
, type
);
1423 str
+= strlen(str
) + 1;
1432 fprintf(fp
, "# pmu mappings: unable to read\n");
1435 static int __event_process_build_id(struct build_id_event
*bev
,
1437 struct perf_session
*session
)
1440 struct list_head
*head
;
1441 struct machine
*machine
;
1444 enum dso_kernel_type dso_type
;
1446 machine
= perf_session__findnew_machine(session
, bev
->pid
);
1450 misc
= bev
->header
.misc
& PERF_RECORD_MISC_CPUMODE_MASK
;
1453 case PERF_RECORD_MISC_KERNEL
:
1454 dso_type
= DSO_TYPE_KERNEL
;
1455 head
= &machine
->kernel_dsos
;
1457 case PERF_RECORD_MISC_GUEST_KERNEL
:
1458 dso_type
= DSO_TYPE_GUEST_KERNEL
;
1459 head
= &machine
->kernel_dsos
;
1461 case PERF_RECORD_MISC_USER
:
1462 case PERF_RECORD_MISC_GUEST_USER
:
1463 dso_type
= DSO_TYPE_USER
;
1464 head
= &machine
->user_dsos
;
1470 dso
= __dsos__findnew(head
, filename
);
1472 char sbuild_id
[BUILD_ID_SIZE
* 2 + 1];
1474 dso__set_build_id(dso
, &bev
->build_id
);
1476 if (filename
[0] == '[')
1477 dso
->kernel
= dso_type
;
1479 build_id__sprintf(dso
->build_id
, sizeof(dso
->build_id
),
1481 pr_debug("build id event received for %s: %s\n",
1482 dso
->long_name
, sbuild_id
);
1490 static int perf_header__read_build_ids_abi_quirk(struct perf_header
*header
,
1491 int input
, u64 offset
, u64 size
)
1493 struct perf_session
*session
= container_of(header
, struct perf_session
, header
);
1495 struct perf_event_header header
;
1496 u8 build_id
[PERF_ALIGN(BUILD_ID_SIZE
, sizeof(u64
))];
1499 struct build_id_event bev
;
1500 char filename
[PATH_MAX
];
1501 u64 limit
= offset
+ size
;
1503 while (offset
< limit
) {
1506 if (read(input
, &old_bev
, sizeof(old_bev
)) != sizeof(old_bev
))
1509 if (header
->needs_swap
)
1510 perf_event_header__bswap(&old_bev
.header
);
1512 len
= old_bev
.header
.size
- sizeof(old_bev
);
1513 if (read(input
, filename
, len
) != len
)
1516 bev
.header
= old_bev
.header
;
1519 * As the pid is the missing value, we need to fill
1520 * it properly. The header.misc value give us nice hint.
1522 bev
.pid
= HOST_KERNEL_ID
;
1523 if (bev
.header
.misc
== PERF_RECORD_MISC_GUEST_USER
||
1524 bev
.header
.misc
== PERF_RECORD_MISC_GUEST_KERNEL
)
1525 bev
.pid
= DEFAULT_GUEST_KERNEL_ID
;
1527 memcpy(bev
.build_id
, old_bev
.build_id
, sizeof(bev
.build_id
));
1528 __event_process_build_id(&bev
, filename
, session
);
1530 offset
+= bev
.header
.size
;
1536 static int perf_header__read_build_ids(struct perf_header
*header
,
1537 int input
, u64 offset
, u64 size
)
1539 struct perf_session
*session
= container_of(header
, struct perf_session
, header
);
1540 struct build_id_event bev
;
1541 char filename
[PATH_MAX
];
1542 u64 limit
= offset
+ size
, orig_offset
= offset
;
1545 while (offset
< limit
) {
1548 if (read(input
, &bev
, sizeof(bev
)) != sizeof(bev
))
1551 if (header
->needs_swap
)
1552 perf_event_header__bswap(&bev
.header
);
1554 len
= bev
.header
.size
- sizeof(bev
);
1555 if (read(input
, filename
, len
) != len
)
1558 * The a1645ce1 changeset:
1560 * "perf: 'perf kvm' tool for monitoring guest performance from host"
1562 * Added a field to struct build_id_event that broke the file
1565 * Since the kernel build-id is the first entry, process the
1566 * table using the old format if the well known
1567 * '[kernel.kallsyms]' string for the kernel build-id has the
1568 * first 4 characters chopped off (where the pid_t sits).
1570 if (memcmp(filename
, "nel.kallsyms]", 13) == 0) {
1571 if (lseek(input
, orig_offset
, SEEK_SET
) == (off_t
)-1)
1573 return perf_header__read_build_ids_abi_quirk(header
, input
, offset
, size
);
1576 __event_process_build_id(&bev
, filename
, session
);
1578 offset
+= bev
.header
.size
;
1585 static int process_tracing_data(struct perf_file_section
*section __maybe_unused
,
1586 struct perf_header
*ph __maybe_unused
,
1589 trace_report(fd
, data
, false);
1593 static int process_build_id(struct perf_file_section
*section
,
1594 struct perf_header
*ph
, int fd
,
1595 void *data __maybe_unused
)
1597 if (perf_header__read_build_ids(ph
, fd
, section
->offset
, section
->size
))
1598 pr_debug("Failed to read buildids, continuing...\n");
1602 static int process_hostname(struct perf_file_section
*section __maybe_unused
,
1603 struct perf_header
*ph
, int fd
,
1604 void *data __maybe_unused
)
1606 ph
->env
.hostname
= do_read_string(fd
, ph
);
1607 return ph
->env
.hostname
? 0 : -ENOMEM
;
1610 static int process_osrelease(struct perf_file_section
*section __maybe_unused
,
1611 struct perf_header
*ph
, int fd
,
1612 void *data __maybe_unused
)
1614 ph
->env
.os_release
= do_read_string(fd
, ph
);
1615 return ph
->env
.os_release
? 0 : -ENOMEM
;
1618 static int process_version(struct perf_file_section
*section __maybe_unused
,
1619 struct perf_header
*ph
, int fd
,
1620 void *data __maybe_unused
)
1622 ph
->env
.version
= do_read_string(fd
, ph
);
1623 return ph
->env
.version
? 0 : -ENOMEM
;
1626 static int process_arch(struct perf_file_section
*section __maybe_unused
,
1627 struct perf_header
*ph
, int fd
,
1628 void *data __maybe_unused
)
1630 ph
->env
.arch
= do_read_string(fd
, ph
);
1631 return ph
->env
.arch
? 0 : -ENOMEM
;
1634 static int process_nrcpus(struct perf_file_section
*section __maybe_unused
,
1635 struct perf_header
*ph
, int fd
,
1636 void *data __maybe_unused
)
1641 ret
= read(fd
, &nr
, sizeof(nr
));
1642 if (ret
!= sizeof(nr
))
1648 ph
->env
.nr_cpus_online
= nr
;
1650 ret
= read(fd
, &nr
, sizeof(nr
));
1651 if (ret
!= sizeof(nr
))
1657 ph
->env
.nr_cpus_avail
= nr
;
1661 static int process_cpudesc(struct perf_file_section
*section __maybe_unused
,
1662 struct perf_header
*ph
, int fd
,
1663 void *data __maybe_unused
)
1665 ph
->env
.cpu_desc
= do_read_string(fd
, ph
);
1666 return ph
->env
.cpu_desc
? 0 : -ENOMEM
;
1669 static int process_cpuid(struct perf_file_section
*section __maybe_unused
,
1670 struct perf_header
*ph
, int fd
,
1671 void *data __maybe_unused
)
1673 ph
->env
.cpuid
= do_read_string(fd
, ph
);
1674 return ph
->env
.cpuid
? 0 : -ENOMEM
;
1677 static int process_total_mem(struct perf_file_section
*section __maybe_unused
,
1678 struct perf_header
*ph
, int fd
,
1679 void *data __maybe_unused
)
1684 ret
= read(fd
, &mem
, sizeof(mem
));
1685 if (ret
!= sizeof(mem
))
1689 mem
= bswap_64(mem
);
1691 ph
->env
.total_mem
= mem
;
1695 static struct perf_evsel
*
1696 perf_evlist__find_by_index(struct perf_evlist
*evlist
, int idx
)
1698 struct perf_evsel
*evsel
;
1700 list_for_each_entry(evsel
, &evlist
->entries
, node
) {
1701 if (evsel
->idx
== idx
)
1709 perf_evlist__set_event_name(struct perf_evlist
*evlist
,
1710 struct perf_evsel
*event
)
1712 struct perf_evsel
*evsel
;
1717 evsel
= perf_evlist__find_by_index(evlist
, event
->idx
);
1724 evsel
->name
= strdup(event
->name
);
1728 process_event_desc(struct perf_file_section
*section __maybe_unused
,
1729 struct perf_header
*header
, int fd
,
1730 void *data __maybe_unused
)
1732 struct perf_session
*session
;
1733 struct perf_evsel
*evsel
, *events
= read_event_desc(header
, fd
);
1738 session
= container_of(header
, struct perf_session
, header
);
1739 for (evsel
= events
; evsel
->attr
.size
; evsel
++)
1740 perf_evlist__set_event_name(session
->evlist
, evsel
);
1742 free_event_desc(events
);
1747 static int process_cmdline(struct perf_file_section
*section __maybe_unused
,
1748 struct perf_header
*ph
, int fd
,
1749 void *data __maybe_unused
)
1756 ret
= read(fd
, &nr
, sizeof(nr
));
1757 if (ret
!= sizeof(nr
))
1763 ph
->env
.nr_cmdline
= nr
;
1764 strbuf_init(&sb
, 128);
1766 for (i
= 0; i
< nr
; i
++) {
1767 str
= do_read_string(fd
, ph
);
1771 /* include a NULL character at the end */
1772 strbuf_add(&sb
, str
, strlen(str
) + 1);
1775 ph
->env
.cmdline
= strbuf_detach(&sb
, NULL
);
1779 strbuf_release(&sb
);
1783 static int process_cpu_topology(struct perf_file_section
*section __maybe_unused
,
1784 struct perf_header
*ph
, int fd
,
1785 void *data __maybe_unused
)
1792 ret
= read(fd
, &nr
, sizeof(nr
));
1793 if (ret
!= sizeof(nr
))
1799 ph
->env
.nr_sibling_cores
= nr
;
1800 strbuf_init(&sb
, 128);
1802 for (i
= 0; i
< nr
; i
++) {
1803 str
= do_read_string(fd
, ph
);
1807 /* include a NULL character at the end */
1808 strbuf_add(&sb
, str
, strlen(str
) + 1);
1811 ph
->env
.sibling_cores
= strbuf_detach(&sb
, NULL
);
1813 ret
= read(fd
, &nr
, sizeof(nr
));
1814 if (ret
!= sizeof(nr
))
1820 ph
->env
.nr_sibling_threads
= nr
;
1822 for (i
= 0; i
< nr
; i
++) {
1823 str
= do_read_string(fd
, ph
);
1827 /* include a NULL character at the end */
1828 strbuf_add(&sb
, str
, strlen(str
) + 1);
1831 ph
->env
.sibling_threads
= strbuf_detach(&sb
, NULL
);
1835 strbuf_release(&sb
);
1839 static int process_numa_topology(struct perf_file_section
*section __maybe_unused
,
1840 struct perf_header
*ph
, int fd
,
1841 void *data __maybe_unused
)
1846 uint64_t mem_total
, mem_free
;
1850 ret
= read(fd
, &nr
, sizeof(nr
));
1851 if (ret
!= sizeof(nr
))
1857 ph
->env
.nr_numa_nodes
= nr
;
1858 strbuf_init(&sb
, 256);
1860 for (i
= 0; i
< nr
; i
++) {
1862 ret
= read(fd
, &node
, sizeof(node
));
1863 if (ret
!= sizeof(node
))
1866 ret
= read(fd
, &mem_total
, sizeof(u64
));
1867 if (ret
!= sizeof(u64
))
1870 ret
= read(fd
, &mem_free
, sizeof(u64
));
1871 if (ret
!= sizeof(u64
))
1874 if (ph
->needs_swap
) {
1875 node
= bswap_32(node
);
1876 mem_total
= bswap_64(mem_total
);
1877 mem_free
= bswap_64(mem_free
);
1880 strbuf_addf(&sb
, "%u:%"PRIu64
":%"PRIu64
":",
1881 node
, mem_total
, mem_free
);
1883 str
= do_read_string(fd
, ph
);
1887 /* include a NULL character at the end */
1888 strbuf_add(&sb
, str
, strlen(str
) + 1);
1891 ph
->env
.numa_nodes
= strbuf_detach(&sb
, NULL
);
1895 strbuf_release(&sb
);
1899 static int process_pmu_mappings(struct perf_file_section
*section __maybe_unused
,
1900 struct perf_header
*ph
, int fd
,
1901 void *data __maybe_unused
)
1909 ret
= read(fd
, &pmu_num
, sizeof(pmu_num
));
1910 if (ret
!= sizeof(pmu_num
))
1914 pmu_num
= bswap_32(pmu_num
);
1917 pr_debug("pmu mappings not available\n");
1921 ph
->env
.nr_pmu_mappings
= pmu_num
;
1922 strbuf_init(&sb
, 128);
1925 if (read(fd
, &type
, sizeof(type
)) != sizeof(type
))
1928 type
= bswap_32(type
);
1930 name
= do_read_string(fd
, ph
);
1934 strbuf_addf(&sb
, "%u:%s", type
, name
);
1935 /* include a NULL character at the end */
1936 strbuf_add(&sb
, "", 1);
1941 ph
->env
.pmu_mappings
= strbuf_detach(&sb
, NULL
);
1945 strbuf_release(&sb
);
1949 struct feature_ops
{
1950 int (*write
)(int fd
, struct perf_header
*h
, struct perf_evlist
*evlist
);
1951 void (*print
)(struct perf_header
*h
, int fd
, FILE *fp
);
1952 int (*process
)(struct perf_file_section
*section
,
1953 struct perf_header
*h
, int fd
, void *data
);
1958 #define FEAT_OPA(n, func) \
1959 [n] = { .name = #n, .write = write_##func, .print = print_##func }
1960 #define FEAT_OPP(n, func) \
1961 [n] = { .name = #n, .write = write_##func, .print = print_##func, \
1962 .process = process_##func }
1963 #define FEAT_OPF(n, func) \
1964 [n] = { .name = #n, .write = write_##func, .print = print_##func, \
1965 .process = process_##func, .full_only = true }
1967 /* feature_ops not implemented: */
1968 #define print_tracing_data NULL
1969 #define print_build_id NULL
1971 static const struct feature_ops feat_ops
[HEADER_LAST_FEATURE
] = {
1972 FEAT_OPP(HEADER_TRACING_DATA
, tracing_data
),
1973 FEAT_OPP(HEADER_BUILD_ID
, build_id
),
1974 FEAT_OPP(HEADER_HOSTNAME
, hostname
),
1975 FEAT_OPP(HEADER_OSRELEASE
, osrelease
),
1976 FEAT_OPP(HEADER_VERSION
, version
),
1977 FEAT_OPP(HEADER_ARCH
, arch
),
1978 FEAT_OPP(HEADER_NRCPUS
, nrcpus
),
1979 FEAT_OPP(HEADER_CPUDESC
, cpudesc
),
1980 FEAT_OPP(HEADER_CPUID
, cpuid
),
1981 FEAT_OPP(HEADER_TOTAL_MEM
, total_mem
),
1982 FEAT_OPP(HEADER_EVENT_DESC
, event_desc
),
1983 FEAT_OPP(HEADER_CMDLINE
, cmdline
),
1984 FEAT_OPF(HEADER_CPU_TOPOLOGY
, cpu_topology
),
1985 FEAT_OPF(HEADER_NUMA_TOPOLOGY
, numa_topology
),
1986 FEAT_OPA(HEADER_BRANCH_STACK
, branch_stack
),
1987 FEAT_OPP(HEADER_PMU_MAPPINGS
, pmu_mappings
),
1990 struct header_print_data
{
1992 bool full
; /* extended list of headers */
1995 static int perf_file_section__fprintf_info(struct perf_file_section
*section
,
1996 struct perf_header
*ph
,
1997 int feat
, int fd
, void *data
)
1999 struct header_print_data
*hd
= data
;
2001 if (lseek(fd
, section
->offset
, SEEK_SET
) == (off_t
)-1) {
2002 pr_debug("Failed to lseek to %" PRIu64
" offset for feature "
2003 "%d, continuing...\n", section
->offset
, feat
);
2006 if (feat
>= HEADER_LAST_FEATURE
) {
2007 pr_warning("unknown feature %d\n", feat
);
2010 if (!feat_ops
[feat
].print
)
2013 if (!feat_ops
[feat
].full_only
|| hd
->full
)
2014 feat_ops
[feat
].print(ph
, fd
, hd
->fp
);
2016 fprintf(hd
->fp
, "# %s info available, use -I to display\n",
2017 feat_ops
[feat
].name
);
2022 int perf_header__fprintf_info(struct perf_session
*session
, FILE *fp
, bool full
)
2024 struct header_print_data hd
;
2025 struct perf_header
*header
= &session
->header
;
2026 int fd
= session
->fd
;
2030 perf_header__process_sections(header
, fd
, &hd
,
2031 perf_file_section__fprintf_info
);
2035 static int do_write_feat(int fd
, struct perf_header
*h
, int type
,
2036 struct perf_file_section
**p
,
2037 struct perf_evlist
*evlist
)
2042 if (perf_header__has_feat(h
, type
)) {
2043 if (!feat_ops
[type
].write
)
2046 (*p
)->offset
= lseek(fd
, 0, SEEK_CUR
);
2048 err
= feat_ops
[type
].write(fd
, h
, evlist
);
2050 pr_debug("failed to write feature %d\n", type
);
2052 /* undo anything written */
2053 lseek(fd
, (*p
)->offset
, SEEK_SET
);
2057 (*p
)->size
= lseek(fd
, 0, SEEK_CUR
) - (*p
)->offset
;
2063 static int perf_header__adds_write(struct perf_header
*header
,
2064 struct perf_evlist
*evlist
, int fd
)
2067 struct perf_file_section
*feat_sec
, *p
;
2073 nr_sections
= bitmap_weight(header
->adds_features
, HEADER_FEAT_BITS
);
2077 feat_sec
= p
= calloc(sizeof(*feat_sec
), nr_sections
);
2078 if (feat_sec
== NULL
)
2081 sec_size
= sizeof(*feat_sec
) * nr_sections
;
2083 sec_start
= header
->data_offset
+ header
->data_size
;
2084 lseek(fd
, sec_start
+ sec_size
, SEEK_SET
);
2086 for_each_set_bit(feat
, header
->adds_features
, HEADER_FEAT_BITS
) {
2087 if (do_write_feat(fd
, header
, feat
, &p
, evlist
))
2088 perf_header__clear_feat(header
, feat
);
2091 lseek(fd
, sec_start
, SEEK_SET
);
2093 * may write more than needed due to dropped feature, but
2094 * this is okay, reader will skip the mising entries
2096 err
= do_write(fd
, feat_sec
, sec_size
);
2098 pr_debug("failed to write feature section\n");
2103 int perf_header__write_pipe(int fd
)
2105 struct perf_pipe_file_header f_header
;
2108 f_header
= (struct perf_pipe_file_header
){
2109 .magic
= PERF_MAGIC
,
2110 .size
= sizeof(f_header
),
2113 err
= do_write(fd
, &f_header
, sizeof(f_header
));
2115 pr_debug("failed to write perf pipe header\n");
2122 int perf_session__write_header(struct perf_session
*session
,
2123 struct perf_evlist
*evlist
,
2124 int fd
, bool at_exit
)
2126 struct perf_file_header f_header
;
2127 struct perf_file_attr f_attr
;
2128 struct perf_header
*header
= &session
->header
;
2129 struct perf_evsel
*evsel
, *pair
= NULL
;
2132 lseek(fd
, sizeof(f_header
), SEEK_SET
);
2134 if (session
->evlist
!= evlist
)
2135 pair
= perf_evlist__first(session
->evlist
);
2137 list_for_each_entry(evsel
, &evlist
->entries
, node
) {
2138 evsel
->id_offset
= lseek(fd
, 0, SEEK_CUR
);
2139 err
= do_write(fd
, evsel
->id
, evsel
->ids
* sizeof(u64
));
2142 pr_debug("failed to write perf header\n");
2145 if (session
->evlist
!= evlist
) {
2146 err
= do_write(fd
, pair
->id
, pair
->ids
* sizeof(u64
));
2149 evsel
->ids
+= pair
->ids
;
2150 pair
= perf_evsel__next(pair
);
2154 header
->attr_offset
= lseek(fd
, 0, SEEK_CUR
);
2156 list_for_each_entry(evsel
, &evlist
->entries
, node
) {
2157 f_attr
= (struct perf_file_attr
){
2158 .attr
= evsel
->attr
,
2160 .offset
= evsel
->id_offset
,
2161 .size
= evsel
->ids
* sizeof(u64
),
2164 err
= do_write(fd
, &f_attr
, sizeof(f_attr
));
2166 pr_debug("failed to write perf header attribute\n");
2171 header
->event_offset
= lseek(fd
, 0, SEEK_CUR
);
2172 header
->event_size
= trace_event_count
* sizeof(struct perf_trace_event_type
);
2174 err
= do_write(fd
, trace_events
, header
->event_size
);
2176 pr_debug("failed to write perf header events\n");
2181 header
->data_offset
= lseek(fd
, 0, SEEK_CUR
);
2184 err
= perf_header__adds_write(header
, evlist
, fd
);
2189 f_header
= (struct perf_file_header
){
2190 .magic
= PERF_MAGIC
,
2191 .size
= sizeof(f_header
),
2192 .attr_size
= sizeof(f_attr
),
2194 .offset
= header
->attr_offset
,
2195 .size
= evlist
->nr_entries
* sizeof(f_attr
),
2198 .offset
= header
->data_offset
,
2199 .size
= header
->data_size
,
2202 .offset
= header
->event_offset
,
2203 .size
= header
->event_size
,
2207 memcpy(&f_header
.adds_features
, &header
->adds_features
, sizeof(header
->adds_features
));
2209 lseek(fd
, 0, SEEK_SET
);
2210 err
= do_write(fd
, &f_header
, sizeof(f_header
));
2212 pr_debug("failed to write perf header\n");
2215 lseek(fd
, header
->data_offset
+ header
->data_size
, SEEK_SET
);
2221 static int perf_header__getbuffer64(struct perf_header
*header
,
2222 int fd
, void *buf
, size_t size
)
2224 if (readn(fd
, buf
, size
) <= 0)
2227 if (header
->needs_swap
)
2228 mem_bswap_64(buf
, size
);
2233 int perf_header__process_sections(struct perf_header
*header
, int fd
,
2235 int (*process
)(struct perf_file_section
*section
,
2236 struct perf_header
*ph
,
2237 int feat
, int fd
, void *data
))
2239 struct perf_file_section
*feat_sec
, *sec
;
2245 nr_sections
= bitmap_weight(header
->adds_features
, HEADER_FEAT_BITS
);
2249 feat_sec
= sec
= calloc(sizeof(*feat_sec
), nr_sections
);
2253 sec_size
= sizeof(*feat_sec
) * nr_sections
;
2255 lseek(fd
, header
->data_offset
+ header
->data_size
, SEEK_SET
);
2257 err
= perf_header__getbuffer64(header
, fd
, feat_sec
, sec_size
);
2261 for_each_set_bit(feat
, header
->adds_features
, HEADER_LAST_FEATURE
) {
2262 err
= process(sec
++, header
, feat
, fd
, data
);
2272 static const int attr_file_abi_sizes
[] = {
2273 [0] = PERF_ATTR_SIZE_VER0
,
2274 [1] = PERF_ATTR_SIZE_VER1
,
2275 [2] = PERF_ATTR_SIZE_VER2
,
2276 [3] = PERF_ATTR_SIZE_VER3
,
2281 * In the legacy file format, the magic number is not used to encode endianness.
2282 * hdr_sz was used to encode endianness. But given that hdr_sz can vary based
2283 * on ABI revisions, we need to try all combinations for all endianness to
2284 * detect the endianness.
2286 static int try_all_file_abis(uint64_t hdr_sz
, struct perf_header
*ph
)
2288 uint64_t ref_size
, attr_size
;
2291 for (i
= 0 ; attr_file_abi_sizes
[i
]; i
++) {
2292 ref_size
= attr_file_abi_sizes
[i
]
2293 + sizeof(struct perf_file_section
);
2294 if (hdr_sz
!= ref_size
) {
2295 attr_size
= bswap_64(hdr_sz
);
2296 if (attr_size
!= ref_size
)
2299 ph
->needs_swap
= true;
2301 pr_debug("ABI%d perf.data file detected, need_swap=%d\n",
2306 /* could not determine endianness */
2310 #define PERF_PIPE_HDR_VER0 16
2312 static const size_t attr_pipe_abi_sizes
[] = {
2313 [0] = PERF_PIPE_HDR_VER0
,
2318 * In the legacy pipe format, there is an implicit assumption that endiannesss
2319 * between host recording the samples, and host parsing the samples is the
2320 * same. This is not always the case given that the pipe output may always be
2321 * redirected into a file and analyzed on a different machine with possibly a
2322 * different endianness and perf_event ABI revsions in the perf tool itself.
2324 static int try_all_pipe_abis(uint64_t hdr_sz
, struct perf_header
*ph
)
2329 for (i
= 0 ; attr_pipe_abi_sizes
[i
]; i
++) {
2330 if (hdr_sz
!= attr_pipe_abi_sizes
[i
]) {
2331 attr_size
= bswap_64(hdr_sz
);
2332 if (attr_size
!= hdr_sz
)
2335 ph
->needs_swap
= true;
2337 pr_debug("Pipe ABI%d perf.data file detected\n", i
);
2343 static int check_magic_endian(u64 magic
, uint64_t hdr_sz
,
2344 bool is_pipe
, struct perf_header
*ph
)
2348 /* check for legacy format */
2349 ret
= memcmp(&magic
, __perf_magic1
, sizeof(magic
));
2351 pr_debug("legacy perf.data format\n");
2353 return try_all_pipe_abis(hdr_sz
, ph
);
2355 return try_all_file_abis(hdr_sz
, ph
);
2358 * the new magic number serves two purposes:
2359 * - unique number to identify actual perf.data files
2360 * - encode endianness of file
2363 /* check magic number with one endianness */
2364 if (magic
== __perf_magic2
)
2367 /* check magic number with opposite endianness */
2368 if (magic
!= __perf_magic2_sw
)
2371 ph
->needs_swap
= true;
2376 int perf_file_header__read(struct perf_file_header
*header
,
2377 struct perf_header
*ph
, int fd
)
2381 lseek(fd
, 0, SEEK_SET
);
2383 ret
= readn(fd
, header
, sizeof(*header
));
2387 if (check_magic_endian(header
->magic
,
2388 header
->attr_size
, false, ph
) < 0) {
2389 pr_debug("magic/endian check failed\n");
2393 if (ph
->needs_swap
) {
2394 mem_bswap_64(header
, offsetof(struct perf_file_header
,
2398 if (header
->size
!= sizeof(*header
)) {
2399 /* Support the previous format */
2400 if (header
->size
== offsetof(typeof(*header
), adds_features
))
2401 bitmap_zero(header
->adds_features
, HEADER_FEAT_BITS
);
2404 } else if (ph
->needs_swap
) {
2406 * feature bitmap is declared as an array of unsigned longs --
2407 * not good since its size can differ between the host that
2408 * generated the data file and the host analyzing the file.
2410 * We need to handle endianness, but we don't know the size of
2411 * the unsigned long where the file was generated. Take a best
2412 * guess at determining it: try 64-bit swap first (ie., file
2413 * created on a 64-bit host), and check if the hostname feature
2414 * bit is set (this feature bit is forced on as of fbe96f2).
2415 * If the bit is not, undo the 64-bit swap and try a 32-bit
2416 * swap. If the hostname bit is still not set (e.g., older data
2417 * file), punt and fallback to the original behavior --
2418 * clearing all feature bits and setting buildid.
2420 mem_bswap_64(&header
->adds_features
,
2421 BITS_TO_U64(HEADER_FEAT_BITS
));
2423 if (!test_bit(HEADER_HOSTNAME
, header
->adds_features
)) {
2425 mem_bswap_64(&header
->adds_features
,
2426 BITS_TO_U64(HEADER_FEAT_BITS
));
2429 mem_bswap_32(&header
->adds_features
,
2430 BITS_TO_U32(HEADER_FEAT_BITS
));
2433 if (!test_bit(HEADER_HOSTNAME
, header
->adds_features
)) {
2434 bitmap_zero(header
->adds_features
, HEADER_FEAT_BITS
);
2435 set_bit(HEADER_BUILD_ID
, header
->adds_features
);
2439 memcpy(&ph
->adds_features
, &header
->adds_features
,
2440 sizeof(ph
->adds_features
));
2442 ph
->event_offset
= header
->event_types
.offset
;
2443 ph
->event_size
= header
->event_types
.size
;
2444 ph
->data_offset
= header
->data
.offset
;
2445 ph
->data_size
= header
->data
.size
;
2449 static int perf_file_section__process(struct perf_file_section
*section
,
2450 struct perf_header
*ph
,
2451 int feat
, int fd
, void *data
)
2453 if (lseek(fd
, section
->offset
, SEEK_SET
) == (off_t
)-1) {
2454 pr_debug("Failed to lseek to %" PRIu64
" offset for feature "
2455 "%d, continuing...\n", section
->offset
, feat
);
2459 if (feat
>= HEADER_LAST_FEATURE
) {
2460 pr_debug("unknown feature %d, continuing...\n", feat
);
2464 if (!feat_ops
[feat
].process
)
2467 return feat_ops
[feat
].process(section
, ph
, fd
, data
);
2470 static int perf_file_header__read_pipe(struct perf_pipe_file_header
*header
,
2471 struct perf_header
*ph
, int fd
,
2476 ret
= readn(fd
, header
, sizeof(*header
));
2480 if (check_magic_endian(header
->magic
, header
->size
, true, ph
) < 0) {
2481 pr_debug("endian/magic failed\n");
2486 header
->size
= bswap_64(header
->size
);
2488 if (repipe
&& do_write(STDOUT_FILENO
, header
, sizeof(*header
)) < 0)
2494 static int perf_header__read_pipe(struct perf_session
*session
, int fd
)
2496 struct perf_header
*header
= &session
->header
;
2497 struct perf_pipe_file_header f_header
;
2499 if (perf_file_header__read_pipe(&f_header
, header
, fd
,
2500 session
->repipe
) < 0) {
2501 pr_debug("incompatible file format\n");
2510 static int read_attr(int fd
, struct perf_header
*ph
,
2511 struct perf_file_attr
*f_attr
)
2513 struct perf_event_attr
*attr
= &f_attr
->attr
;
2515 size_t our_sz
= sizeof(f_attr
->attr
);
2518 memset(f_attr
, 0, sizeof(*f_attr
));
2520 /* read minimal guaranteed structure */
2521 ret
= readn(fd
, attr
, PERF_ATTR_SIZE_VER0
);
2523 pr_debug("cannot read %d bytes of header attr\n",
2524 PERF_ATTR_SIZE_VER0
);
2528 /* on file perf_event_attr size */
2536 sz
= PERF_ATTR_SIZE_VER0
;
2537 } else if (sz
> our_sz
) {
2538 pr_debug("file uses a more recent and unsupported ABI"
2539 " (%zu bytes extra)\n", sz
- our_sz
);
2542 /* what we have not yet read and that we know about */
2543 left
= sz
- PERF_ATTR_SIZE_VER0
;
2546 ptr
+= PERF_ATTR_SIZE_VER0
;
2548 ret
= readn(fd
, ptr
, left
);
2550 /* read perf_file_section, ids are read in caller */
2551 ret
= readn(fd
, &f_attr
->ids
, sizeof(f_attr
->ids
));
2553 return ret
<= 0 ? -1 : 0;
2556 static int perf_evsel__prepare_tracepoint_event(struct perf_evsel
*evsel
,
2557 struct pevent
*pevent
)
2559 struct event_format
*event
;
2562 /* already prepared */
2563 if (evsel
->tp_format
)
2566 event
= pevent_find_event(pevent
, evsel
->attr
.config
);
2571 snprintf(bf
, sizeof(bf
), "%s:%s", event
->system
, event
->name
);
2572 evsel
->name
= strdup(bf
);
2573 if (evsel
->name
== NULL
)
2577 evsel
->tp_format
= event
;
2581 static int perf_evlist__prepare_tracepoint_events(struct perf_evlist
*evlist
,
2582 struct pevent
*pevent
)
2584 struct perf_evsel
*pos
;
2586 list_for_each_entry(pos
, &evlist
->entries
, node
) {
2587 if (pos
->attr
.type
== PERF_TYPE_TRACEPOINT
&&
2588 perf_evsel__prepare_tracepoint_event(pos
, pevent
))
2595 int perf_session__read_header(struct perf_session
*session
, int fd
)
2597 struct perf_header
*header
= &session
->header
;
2598 struct perf_file_header f_header
;
2599 struct perf_file_attr f_attr
;
2601 int nr_attrs
, nr_ids
, i
, j
;
2603 session
->evlist
= perf_evlist__new(NULL
, NULL
);
2604 if (session
->evlist
== NULL
)
2607 if (session
->fd_pipe
)
2608 return perf_header__read_pipe(session
, fd
);
2610 if (perf_file_header__read(&f_header
, header
, fd
) < 0)
2613 nr_attrs
= f_header
.attrs
.size
/ f_header
.attr_size
;
2614 lseek(fd
, f_header
.attrs
.offset
, SEEK_SET
);
2616 for (i
= 0; i
< nr_attrs
; i
++) {
2617 struct perf_evsel
*evsel
;
2620 if (read_attr(fd
, header
, &f_attr
) < 0)
2623 if (header
->needs_swap
)
2624 perf_event__attr_swap(&f_attr
.attr
);
2626 tmp
= lseek(fd
, 0, SEEK_CUR
);
2627 evsel
= perf_evsel__new(&f_attr
.attr
, i
);
2630 goto out_delete_evlist
;
2632 evsel
->needs_swap
= header
->needs_swap
;
2634 * Do it before so that if perf_evsel__alloc_id fails, this
2635 * entry gets purged too at perf_evlist__delete().
2637 perf_evlist__add(session
->evlist
, evsel
);
2639 nr_ids
= f_attr
.ids
.size
/ sizeof(u64
);
2641 * We don't have the cpu and thread maps on the header, so
2642 * for allocating the perf_sample_id table we fake 1 cpu and
2643 * hattr->ids threads.
2645 if (perf_evsel__alloc_id(evsel
, 1, nr_ids
))
2646 goto out_delete_evlist
;
2648 lseek(fd
, f_attr
.ids
.offset
, SEEK_SET
);
2650 for (j
= 0; j
< nr_ids
; j
++) {
2651 if (perf_header__getbuffer64(header
, fd
, &f_id
, sizeof(f_id
)))
2654 perf_evlist__id_add(session
->evlist
, evsel
, 0, j
, f_id
);
2657 lseek(fd
, tmp
, SEEK_SET
);
2660 symbol_conf
.nr_events
= nr_attrs
;
2662 if (f_header
.event_types
.size
) {
2663 lseek(fd
, f_header
.event_types
.offset
, SEEK_SET
);
2664 trace_events
= malloc(f_header
.event_types
.size
);
2665 if (trace_events
== NULL
)
2667 if (perf_header__getbuffer64(header
, fd
, trace_events
,
2668 f_header
.event_types
.size
))
2670 trace_event_count
= f_header
.event_types
.size
/ sizeof(struct perf_trace_event_type
);
2673 perf_header__process_sections(header
, fd
, &session
->pevent
,
2674 perf_file_section__process
);
2676 lseek(fd
, header
->data_offset
, SEEK_SET
);
2678 if (perf_evlist__prepare_tracepoint_events(session
->evlist
,
2680 goto out_delete_evlist
;
2688 perf_evlist__delete(session
->evlist
);
2689 session
->evlist
= NULL
;
2693 int perf_event__synthesize_attr(struct perf_tool
*tool
,
2694 struct perf_event_attr
*attr
, u32 ids
, u64
*id
,
2695 perf_event__handler_t process
)
2697 union perf_event
*ev
;
2701 size
= sizeof(struct perf_event_attr
);
2702 size
= PERF_ALIGN(size
, sizeof(u64
));
2703 size
+= sizeof(struct perf_event_header
);
2704 size
+= ids
* sizeof(u64
);
2711 ev
->attr
.attr
= *attr
;
2712 memcpy(ev
->attr
.id
, id
, ids
* sizeof(u64
));
2714 ev
->attr
.header
.type
= PERF_RECORD_HEADER_ATTR
;
2715 ev
->attr
.header
.size
= (u16
)size
;
2717 if (ev
->attr
.header
.size
== size
)
2718 err
= process(tool
, ev
, NULL
, NULL
);
2727 int perf_event__synthesize_attrs(struct perf_tool
*tool
,
2728 struct perf_session
*session
,
2729 perf_event__handler_t process
)
2731 struct perf_evsel
*evsel
;
2734 list_for_each_entry(evsel
, &session
->evlist
->entries
, node
) {
2735 err
= perf_event__synthesize_attr(tool
, &evsel
->attr
, evsel
->ids
,
2736 evsel
->id
, process
);
2738 pr_debug("failed to create perf header attribute\n");
2746 int perf_event__process_attr(union perf_event
*event
,
2747 struct perf_evlist
**pevlist
)
2750 struct perf_evsel
*evsel
;
2751 struct perf_evlist
*evlist
= *pevlist
;
2753 if (evlist
== NULL
) {
2754 *pevlist
= evlist
= perf_evlist__new(NULL
, NULL
);
2759 evsel
= perf_evsel__new(&event
->attr
.attr
, evlist
->nr_entries
);
2763 perf_evlist__add(evlist
, evsel
);
2765 ids
= event
->header
.size
;
2766 ids
-= (void *)&event
->attr
.id
- (void *)event
;
2767 n_ids
= ids
/ sizeof(u64
);
2769 * We don't have the cpu and thread maps on the header, so
2770 * for allocating the perf_sample_id table we fake 1 cpu and
2771 * hattr->ids threads.
2773 if (perf_evsel__alloc_id(evsel
, 1, n_ids
))
2776 for (i
= 0; i
< n_ids
; i
++) {
2777 perf_evlist__id_add(evlist
, evsel
, 0, i
, event
->attr
.id
[i
]);
2783 int perf_event__synthesize_event_type(struct perf_tool
*tool
,
2784 u64 event_id
, char *name
,
2785 perf_event__handler_t process
,
2786 struct machine
*machine
)
2788 union perf_event ev
;
2792 memset(&ev
, 0, sizeof(ev
));
2794 ev
.event_type
.event_type
.event_id
= event_id
;
2795 memset(ev
.event_type
.event_type
.name
, 0, MAX_EVENT_NAME
);
2796 strncpy(ev
.event_type
.event_type
.name
, name
, MAX_EVENT_NAME
- 1);
2798 ev
.event_type
.header
.type
= PERF_RECORD_HEADER_EVENT_TYPE
;
2799 size
= strlen(ev
.event_type
.event_type
.name
);
2800 size
= PERF_ALIGN(size
, sizeof(u64
));
2801 ev
.event_type
.header
.size
= sizeof(ev
.event_type
) -
2802 (sizeof(ev
.event_type
.event_type
.name
) - size
);
2804 err
= process(tool
, &ev
, NULL
, machine
);
2809 int perf_event__synthesize_event_types(struct perf_tool
*tool
,
2810 perf_event__handler_t process
,
2811 struct machine
*machine
)
2813 struct perf_trace_event_type
*type
;
2816 for (i
= 0; i
< trace_event_count
; i
++) {
2817 type
= &trace_events
[i
];
2819 err
= perf_event__synthesize_event_type(tool
, type
->event_id
,
2820 type
->name
, process
,
2823 pr_debug("failed to create perf header event type\n");
2831 int perf_event__process_event_type(struct perf_tool
*tool __maybe_unused
,
2832 union perf_event
*event
)
2834 if (perf_header__push_event(event
->event_type
.event_type
.event_id
,
2835 event
->event_type
.event_type
.name
) < 0)
2841 int perf_event__synthesize_tracing_data(struct perf_tool
*tool
, int fd
,
2842 struct perf_evlist
*evlist
,
2843 perf_event__handler_t process
)
2845 union perf_event ev
;
2846 struct tracing_data
*tdata
;
2847 ssize_t size
= 0, aligned_size
= 0, padding
;
2848 int err __maybe_unused
= 0;
2851 * We are going to store the size of the data followed
2852 * by the data contents. Since the fd descriptor is a pipe,
2853 * we cannot seek back to store the size of the data once
2854 * we know it. Instead we:
2856 * - write the tracing data to the temp file
2857 * - get/write the data size to pipe
2858 * - write the tracing data from the temp file
2861 tdata
= tracing_data_get(&evlist
->entries
, fd
, true);
2865 memset(&ev
, 0, sizeof(ev
));
2867 ev
.tracing_data
.header
.type
= PERF_RECORD_HEADER_TRACING_DATA
;
2869 aligned_size
= PERF_ALIGN(size
, sizeof(u64
));
2870 padding
= aligned_size
- size
;
2871 ev
.tracing_data
.header
.size
= sizeof(ev
.tracing_data
);
2872 ev
.tracing_data
.size
= aligned_size
;
2874 process(tool
, &ev
, NULL
, NULL
);
2877 * The put function will copy all the tracing data
2878 * stored in temp file to the pipe.
2880 tracing_data_put(tdata
);
2882 write_padded(fd
, NULL
, 0, padding
);
2884 return aligned_size
;
2887 int perf_event__process_tracing_data(union perf_event
*event
,
2888 struct perf_session
*session
)
2890 ssize_t size_read
, padding
, size
= event
->tracing_data
.size
;
2891 off_t offset
= lseek(session
->fd
, 0, SEEK_CUR
);
2894 /* setup for reading amidst mmap */
2895 lseek(session
->fd
, offset
+ sizeof(struct tracing_data_event
),
2898 size_read
= trace_report(session
->fd
, &session
->pevent
,
2900 padding
= PERF_ALIGN(size_read
, sizeof(u64
)) - size_read
;
2902 if (read(session
->fd
, buf
, padding
) < 0)
2903 die("reading input file");
2904 if (session
->repipe
) {
2905 int retw
= write(STDOUT_FILENO
, buf
, padding
);
2906 if (retw
<= 0 || retw
!= padding
)
2907 die("repiping tracing data padding");
2910 if (size_read
+ padding
!= size
)
2911 die("tracing data size mismatch");
2913 perf_evlist__prepare_tracepoint_events(session
->evlist
,
2916 return size_read
+ padding
;
2919 int perf_event__synthesize_build_id(struct perf_tool
*tool
,
2920 struct dso
*pos
, u16 misc
,
2921 perf_event__handler_t process
,
2922 struct machine
*machine
)
2924 union perf_event ev
;
2931 memset(&ev
, 0, sizeof(ev
));
2933 len
= pos
->long_name_len
+ 1;
2934 len
= PERF_ALIGN(len
, NAME_ALIGN
);
2935 memcpy(&ev
.build_id
.build_id
, pos
->build_id
, sizeof(pos
->build_id
));
2936 ev
.build_id
.header
.type
= PERF_RECORD_HEADER_BUILD_ID
;
2937 ev
.build_id
.header
.misc
= misc
;
2938 ev
.build_id
.pid
= machine
->pid
;
2939 ev
.build_id
.header
.size
= sizeof(ev
.build_id
) + len
;
2940 memcpy(&ev
.build_id
.filename
, pos
->long_name
, pos
->long_name_len
);
2942 err
= process(tool
, &ev
, NULL
, machine
);
2947 int perf_event__process_build_id(struct perf_tool
*tool __maybe_unused
,
2948 union perf_event
*event
,
2949 struct perf_session
*session
)
2951 __event_process_build_id(&event
->build_id
,
2952 event
->build_id
.filename
,
2957 void disable_buildid_cache(void)
2959 no_buildid_cache
= true;