perf session: Make read_build_id routines look at the host_machine too
The changes made to support host and guest machines in a session, that started when the 'perf kvm' tool was introduced ended up introducing a bug where the host_machine was not having its DSOs traversed for build-id processing. Fix it by moving some methods to the right classes and considering the host_machine when processing build-ids. Reported-by: Tom Zanussi <tzanussi@gmail.com> Reported-by: Stephane Eranian <eranian@google.com> Cc: Frédéric Weisbecker <fweisbec@gmail.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Stephane Eranian <eranian@google.com> Cc: Tom Zanussi <tzanussi@gmail.com> LKML-Reference: <new-submission> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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@ -221,29 +221,38 @@ static int __dsos__write_buildid_table(struct list_head *head, pid_t pid,
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return 0;
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}
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static int machine__write_buildid_table(struct machine *self, int fd)
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{
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int err;
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u16 kmisc = PERF_RECORD_MISC_KERNEL,
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umisc = PERF_RECORD_MISC_USER;
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if (!machine__is_host(self)) {
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kmisc = PERF_RECORD_MISC_GUEST_KERNEL;
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umisc = PERF_RECORD_MISC_GUEST_USER;
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}
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err = __dsos__write_buildid_table(&self->kernel_dsos, self->pid,
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kmisc, fd);
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if (err == 0)
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err = __dsos__write_buildid_table(&self->user_dsos,
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self->pid, umisc, fd);
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return err;
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}
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static int dsos__write_buildid_table(struct perf_header *header, int fd)
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{
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struct perf_session *session = container_of(header,
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struct perf_session, header);
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struct rb_node *nd;
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int err = 0;
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u16 kmisc, umisc;
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int err = machine__write_buildid_table(&session->host_machine, fd);
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if (err)
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return err;
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for (nd = rb_first(&session->machines); nd; nd = rb_next(nd)) {
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struct machine *pos = rb_entry(nd, struct machine, rb_node);
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if (machine__is_host(pos)) {
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kmisc = PERF_RECORD_MISC_KERNEL;
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umisc = PERF_RECORD_MISC_USER;
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} else {
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kmisc = PERF_RECORD_MISC_GUEST_KERNEL;
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umisc = PERF_RECORD_MISC_GUEST_USER;
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}
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err = __dsos__write_buildid_table(&pos->kernel_dsos, pos->pid,
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kmisc, fd);
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if (err == 0)
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err = __dsos__write_buildid_table(&pos->user_dsos,
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pos->pid, umisc, fd);
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err = machine__write_buildid_table(pos, fd);
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if (err)
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break;
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}
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@ -363,12 +372,17 @@ static int __dsos__cache_build_ids(struct list_head *head, const char *debugdir)
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return err;
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}
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static int dsos__cache_build_ids(struct perf_header *self)
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static int machine__cache_build_ids(struct machine *self, const char *debugdir)
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{
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int ret = __dsos__cache_build_ids(&self->kernel_dsos, debugdir);
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ret |= __dsos__cache_build_ids(&self->user_dsos, debugdir);
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return ret;
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}
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static int perf_session__cache_build_ids(struct perf_session *self)
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{
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struct perf_session *session = container_of(self,
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struct perf_session, header);
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struct rb_node *nd;
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int ret = 0;
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int ret;
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char debugdir[PATH_MAX];
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snprintf(debugdir, sizeof(debugdir), "%s/%s", getenv("HOME"),
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@ -377,25 +391,30 @@ static int dsos__cache_build_ids(struct perf_header *self)
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if (mkdir(debugdir, 0755) != 0 && errno != EEXIST)
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return -1;
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for (nd = rb_first(&session->machines); nd; nd = rb_next(nd)) {
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ret = machine__cache_build_ids(&self->host_machine, debugdir);
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for (nd = rb_first(&self->machines); nd; nd = rb_next(nd)) {
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struct machine *pos = rb_entry(nd, struct machine, rb_node);
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ret |= __dsos__cache_build_ids(&pos->kernel_dsos, debugdir);
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ret |= __dsos__cache_build_ids(&pos->user_dsos, debugdir);
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ret |= machine__cache_build_ids(pos, debugdir);
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}
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return ret ? -1 : 0;
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}
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static bool dsos__read_build_ids(struct perf_header *self, bool with_hits)
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static bool machine__read_build_ids(struct machine *self, bool with_hits)
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{
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bool ret = false;
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struct perf_session *session = container_of(self,
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struct perf_session, header);
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struct rb_node *nd;
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bool ret = __dsos__read_build_ids(&self->kernel_dsos, with_hits);
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ret |= __dsos__read_build_ids(&self->user_dsos, with_hits);
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return ret;
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}
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for (nd = rb_first(&session->machines); nd; nd = rb_next(nd)) {
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static bool perf_session__read_build_ids(struct perf_session *self, bool with_hits)
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{
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struct rb_node *nd;
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bool ret = machine__read_build_ids(&self->host_machine, with_hits);
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for (nd = rb_first(&self->machines); nd; nd = rb_next(nd)) {
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struct machine *pos = rb_entry(nd, struct machine, rb_node);
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ret |= __dsos__read_build_ids(&pos->kernel_dsos, with_hits);
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ret |= __dsos__read_build_ids(&pos->user_dsos, with_hits);
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ret |= machine__read_build_ids(pos, with_hits);
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}
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return ret;
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@ -404,12 +423,14 @@ static bool dsos__read_build_ids(struct perf_header *self, bool with_hits)
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static int perf_header__adds_write(struct perf_header *self, int fd)
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{
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int nr_sections;
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struct perf_session *session;
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struct perf_file_section *feat_sec;
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int sec_size;
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u64 sec_start;
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int idx = 0, err;
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if (dsos__read_build_ids(self, true))
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session = container_of(self, struct perf_session, header);
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if (perf_session__read_build_ids(session, true))
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perf_header__set_feat(self, HEADER_BUILD_ID);
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nr_sections = bitmap_weight(self->adds_features, HEADER_FEAT_BITS);
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@ -450,7 +471,7 @@ static int perf_header__adds_write(struct perf_header *self, int fd)
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}
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buildid_sec->size = lseek(fd, 0, SEEK_CUR) -
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buildid_sec->offset;
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dsos__cache_build_ids(self);
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perf_session__cache_build_ids(session);
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}
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lseek(fd, sec_start, SEEK_SET);
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@ -490,7 +511,6 @@ int perf_header__write(struct perf_header *self, int fd, bool at_exit)
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lseek(fd, sizeof(f_header), SEEK_SET);
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for (i = 0; i < self->attrs; i++) {
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attr = self->attr[i];
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@ -895,3 +895,10 @@ size_t perf_session__fprintf_dsos(struct perf_session *self, FILE *fp)
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__dsos__fprintf(&self->host_machine.user_dsos, fp) +
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machines__fprintf_dsos(&self->machines, fp);
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}
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size_t perf_session__fprintf_dsos_buildid(struct perf_session *self, FILE *fp,
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bool with_hits)
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{
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size_t ret = machine__fprintf_dsos_buildid(&self->host_machine, fp, with_hits);
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return ret + machines__fprintf_dsos_buildid(&self->machines, fp, with_hits);
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}
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@ -132,12 +132,8 @@ void perf_session__process_machines(struct perf_session *self,
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size_t perf_session__fprintf_dsos(struct perf_session *self, FILE *fp);
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static inline
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size_t perf_session__fprintf_dsos_buildid(struct perf_session *self, FILE *fp,
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bool with_hits)
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{
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return machines__fprintf_dsos_buildid(&self->machines, fp, with_hits);
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}
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size_t perf_session__fprintf_dsos_buildid(struct perf_session *self,
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FILE *fp, bool with_hits);
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static inline
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size_t perf_session__fprintf_nr_events(struct perf_session *self, FILE *fp)
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@ -1937,6 +1937,12 @@ static size_t __dsos__fprintf_buildid(struct list_head *head, FILE *fp,
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return ret;
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}
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size_t machine__fprintf_dsos_buildid(struct machine *self, FILE *fp, bool with_hits)
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{
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return __dsos__fprintf_buildid(&self->kernel_dsos, fp, with_hits) +
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__dsos__fprintf_buildid(&self->user_dsos, fp, with_hits);
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}
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size_t machines__fprintf_dsos_buildid(struct rb_root *self, FILE *fp, bool with_hits)
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{
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struct rb_node *nd;
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@ -1944,8 +1950,7 @@ size_t machines__fprintf_dsos_buildid(struct rb_root *self, FILE *fp, bool with_
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for (nd = rb_first(self); nd; nd = rb_next(nd)) {
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struct machine *pos = rb_entry(nd, struct machine, rb_node);
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ret += __dsos__fprintf_buildid(&pos->kernel_dsos, fp, with_hits);
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ret += __dsos__fprintf_buildid(&pos->user_dsos, fp, with_hits);
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ret += machine__fprintf_dsos_buildid(pos, fp, with_hits);
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}
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return ret;
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}
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@ -170,6 +170,7 @@ int machine__load_vmlinux_path(struct machine *self, enum map_type type,
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size_t __dsos__fprintf(struct list_head *head, FILE *fp);
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size_t machine__fprintf_dsos_buildid(struct machine *self, FILE *fp, bool with_hits);
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size_t machines__fprintf_dsos(struct rb_root *self, FILE *fp);
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size_t machines__fprintf_dsos_buildid(struct rb_root *self, FILE *fp, bool with_hits);
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