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Commit f869097e authored by Arnaldo Carvalho de Melo's avatar Arnaldo Carvalho de Melo
Browse files

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: default avatarTom Zanussi <tzanussi@gmail.com>
Reported-by: default avatarStephane 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: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent f6e1467d

tools/perf/util/header.c

+52 −32
Original line number Diff line number Diff line
@@ -221,29 +221,38 @@ static int __dsos__write_buildid_table(struct list_head *head, pid_t pid, 
	return 0;

}



static int dsos__write_buildid_table(struct perf_header *header, int fd)

static int machine__write_buildid_table(struct machine *self, int fd)

{

	struct perf_session *session = container_of(header,

			struct perf_session, header);

	struct rb_node *nd;

	int err = 0;

	u16 kmisc, umisc;



	for (nd = rb_first(&session->machines); nd; nd = rb_next(nd)) {

		struct machine *pos = rb_entry(nd, struct machine, rb_node);

		if (machine__is_host(pos)) {

			kmisc = PERF_RECORD_MISC_KERNEL;

	int err;

	u16 kmisc = PERF_RECORD_MISC_KERNEL,

	    umisc = PERF_RECORD_MISC_USER;

		} else {



	if (!machine__is_host(self)) {

		kmisc = PERF_RECORD_MISC_GUEST_KERNEL;

		umisc = PERF_RECORD_MISC_GUEST_USER;

	}



		err = __dsos__write_buildid_table(&pos->kernel_dsos, pos->pid,

	err = __dsos__write_buildid_table(&self->kernel_dsos, self->pid,

					  kmisc, fd);

	if (err == 0)

			err = __dsos__write_buildid_table(&pos->user_dsos,

							  pos->pid, umisc, fd);

		err = __dsos__write_buildid_table(&self->user_dsos,

						  self->pid, umisc, fd);

	return err;

}



static int dsos__write_buildid_table(struct perf_header *header, int fd)

{

	struct perf_session *session = container_of(header,

			struct perf_session, header);

	struct rb_node *nd;

	int err = machine__write_buildid_table(&session->host_machine, fd);



	if (err)

		return err;



	for (nd = rb_first(&session->machines); nd; nd = rb_next(nd)) {

		struct machine *pos = rb_entry(nd, struct machine, rb_node);

		err = machine__write_buildid_table(pos, fd);

		if (err)

			break;

	}
@@ -363,12 +372,17 @@ static int __dsos__cache_build_ids(struct list_head *head, const char *debugdir) 
	return err;

}



static int dsos__cache_build_ids(struct perf_header *self)

static int machine__cache_build_ids(struct machine *self, const char *debugdir)

{

	int ret = __dsos__cache_build_ids(&self->kernel_dsos, debugdir);

	ret |= __dsos__cache_build_ids(&self->user_dsos, debugdir);

	return ret;

}



static int perf_session__cache_build_ids(struct perf_session *self)

{

	struct perf_session *session = container_of(self,

			struct perf_session, header);

	struct rb_node *nd;

	int ret = 0;

	int ret;

	char debugdir[PATH_MAX];



	snprintf(debugdir, sizeof(debugdir), "%s/%s", getenv("HOME"),
@@ -377,25 +391,30 @@ static int dsos__cache_build_ids(struct perf_header *self) 
	if (mkdir(debugdir, 0755) != 0 && errno != EEXIST)

		return -1;



	for (nd = rb_first(&session->machines); nd; nd = rb_next(nd)) {

	ret = machine__cache_build_ids(&self->host_machine, debugdir);



	for (nd = rb_first(&self->machines); nd; nd = rb_next(nd)) {

		struct machine *pos = rb_entry(nd, struct machine, rb_node);

		ret |= __dsos__cache_build_ids(&pos->kernel_dsos, debugdir);

		ret |= __dsos__cache_build_ids(&pos->user_dsos, debugdir);

		ret |= machine__cache_build_ids(pos, debugdir);

	}

	return ret ? -1 : 0;

}



static bool dsos__read_build_ids(struct perf_header *self, bool with_hits)

static bool machine__read_build_ids(struct machine *self, bool with_hits)

{

	bool ret = __dsos__read_build_ids(&self->kernel_dsos, with_hits);

	ret |= __dsos__read_build_ids(&self->user_dsos, with_hits);

	return ret;

}



static bool perf_session__read_build_ids(struct perf_session *self, bool with_hits)

{

	bool ret = false;

	struct perf_session *session = container_of(self,

			struct perf_session, header);

	struct rb_node *nd;

	bool ret = machine__read_build_ids(&self->host_machine, with_hits);



	for (nd = rb_first(&session->machines); nd; nd = rb_next(nd)) {

	for (nd = rb_first(&self->machines); nd; nd = rb_next(nd)) {

		struct machine *pos = rb_entry(nd, struct machine, rb_node);

		ret |= __dsos__read_build_ids(&pos->kernel_dsos, with_hits);

		ret |= __dsos__read_build_ids(&pos->user_dsos, with_hits);

		ret |= machine__read_build_ids(pos, with_hits);

	}



	return ret;
@@ -404,12 +423,14 @@ static bool dsos__read_build_ids(struct perf_header *self, bool with_hits) 
static int perf_header__adds_write(struct perf_header *self, int fd)

{

	int nr_sections;

	struct perf_session *session;

	struct perf_file_section *feat_sec;

	int sec_size;

	u64 sec_start;

	int idx = 0, err;



	if (dsos__read_build_ids(self, true))

	session = container_of(self, struct perf_session, header);

	if (perf_session__read_build_ids(session, true))

		perf_header__set_feat(self, HEADER_BUILD_ID);



	nr_sections = bitmap_weight(self->adds_features, HEADER_FEAT_BITS);
@@ -450,7 +471,7 @@ static int perf_header__adds_write(struct perf_header *self, int fd) 
		}

		buildid_sec->size = lseek(fd, 0, SEEK_CUR) -

					  buildid_sec->offset;

		dsos__cache_build_ids(self);

		perf_session__cache_build_ids(session);

	}



	lseek(fd, sec_start, SEEK_SET);
@@ -490,7 +511,6 @@ int perf_header__write(struct perf_header *self, int fd, bool at_exit) 


	lseek(fd, sizeof(f_header), SEEK_SET);





	for (i = 0; i < self->attrs; i++) {

		attr = self->attr[i];

tools/perf/util/session.c

+7 −0
Original line number Diff line number Diff line
@@ -895,3 +895,10 @@ size_t perf_session__fprintf_dsos(struct perf_session *self, FILE *fp) 
	       __dsos__fprintf(&self->host_machine.user_dsos, fp) +

	       machines__fprintf_dsos(&self->machines, fp);

}



size_t perf_session__fprintf_dsos_buildid(struct perf_session *self, FILE *fp,

					  bool with_hits)

{

	size_t ret = machine__fprintf_dsos_buildid(&self->host_machine, fp, with_hits);

	return ret + machines__fprintf_dsos_buildid(&self->machines, fp, with_hits);

}

tools/perf/util/session.h

+2 −6
Original line number Diff line number Diff line
@@ -132,12 +132,8 @@ void perf_session__process_machines(struct perf_session *self, 


size_t perf_session__fprintf_dsos(struct perf_session *self, FILE *fp);



static inline

size_t perf_session__fprintf_dsos_buildid(struct perf_session *self, FILE *fp,

					  bool with_hits)

{

	return machines__fprintf_dsos_buildid(&self->machines, fp, with_hits);

}

size_t perf_session__fprintf_dsos_buildid(struct perf_session *self,

					  FILE *fp, bool with_hits);



static inline

size_t perf_session__fprintf_nr_events(struct perf_session *self, FILE *fp)

tools/perf/util/symbol.c

+7 −2
Original line number Diff line number Diff line
@@ -1937,6 +1937,12 @@ static size_t __dsos__fprintf_buildid(struct list_head *head, FILE *fp, 
	return ret;

}



size_t machine__fprintf_dsos_buildid(struct machine *self, FILE *fp, bool with_hits)

{

	return __dsos__fprintf_buildid(&self->kernel_dsos, fp, with_hits) +

	       __dsos__fprintf_buildid(&self->user_dsos, fp, with_hits);

}



size_t machines__fprintf_dsos_buildid(struct rb_root *self, FILE *fp, bool with_hits)

{

	struct rb_node *nd;
@@ -1944,8 +1950,7 @@ size_t machines__fprintf_dsos_buildid(struct rb_root *self, FILE *fp, bool with_ 


	for (nd = rb_first(self); nd; nd = rb_next(nd)) {

		struct machine *pos = rb_entry(nd, struct machine, rb_node);

		ret += __dsos__fprintf_buildid(&pos->kernel_dsos, fp, with_hits);

		ret += __dsos__fprintf_buildid(&pos->user_dsos, fp, with_hits);

		ret += machine__fprintf_dsos_buildid(pos, fp, with_hits);

	}

	return ret;

}

tools/perf/util/symbol.h

+1 −0
Original line number Diff line number Diff line
@@ -170,6 +170,7 @@ int machine__load_vmlinux_path(struct machine *self, enum map_type type, 


size_t __dsos__fprintf(struct list_head *head, FILE *fp);



size_t machine__fprintf_dsos_buildid(struct machine *self, FILE *fp, bool with_hits);

size_t machines__fprintf_dsos(struct rb_root *self, FILE *fp);

size_t machines__fprintf_dsos_buildid(struct rb_root *self, FILE *fp, bool with_hits);