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Commit e30a3d12 authored by Arnaldo Carvalho de Melo's avatar Arnaldo Carvalho de Melo Committed by Ingo Molnar
Browse files

perf symbols: Kill struct build_id_list and die() another day 



No need for this struct and its allocations, we can just use the
->build_id member we already have in struct dso, then ask for it
to be read, and later traverse the dsos list, writing the
buildid table to the perf.data file.

As a bonus, one more die() function got killed.

Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
Cc: Frédéric Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
LKML-Reference: <1258582853-8579-2-git-send-email-acme@infradead.org>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent d3379ab9

tools/perf/util/event.h

+0 −7
Original line number Diff line number Diff line
@@ -69,13 +69,6 @@ struct build_id_event { 
	char			 filename[];

};



struct build_id_list {

	struct build_id_event	event;

	struct list_head	list;

	const char		*dso_name;

	int			len;

};



typedef union event_union {

	struct perf_event_header	header;

	struct ip_event			ip;

tools/perf/util/header.c

+18 −13
Original line number Diff line number Diff line
@@ -176,18 +176,24 @@ static int do_write(int fd, const void *buf, size_t size) 
	return 0;

}



static int write_buildid_table(int fd, struct list_head *id_head)

static int dsos__write_buildid_table(int fd)

{

	struct build_id_list *iter, *next;



	list_for_each_entry_safe(iter, next, id_head, list) {

		struct build_id_event *b = &iter->event;



		if (do_write(fd, b, sizeof(*b)) < 0 ||

		    do_write(fd, iter->dso_name, iter->len) < 0)

	struct dso *pos;



	list_for_each_entry(pos, &dsos, node) {

		struct build_id_event b;

		size_t len;



		if (!pos->has_build_id)

			continue;

		len = pos->long_name_len + 1;

		len = ALIGN(len, 64);

		memset(&b, 0, sizeof(b));

		memcpy(&b.build_id, pos->build_id, sizeof(pos->build_id));

		b.header.size = sizeof(b) + len;

		if (do_write(fd, &b, sizeof(b)) < 0 ||

		    do_write(fd, pos->long_name, len) < 0)

			return -1;

		list_del(&iter->list);

		free(iter);

	}



	return 0;
@@ -196,14 +202,13 @@ static int write_buildid_table(int fd, struct list_head *id_head) 
static void

perf_header__adds_write(struct perf_header *self, int fd)

{

	LIST_HEAD(id_list);

	int nr_sections;

	struct perf_file_section *feat_sec;

	int sec_size;

	u64 sec_start;

	int idx = 0;



	if (fetch_build_id_table(&id_list))

	if (dsos__read_build_ids())

		perf_header__set_feat(self, HEADER_BUILD_ID);



	nr_sections = bitmap_weight(self->adds_features, HEADER_FEAT_BITS);
@@ -238,7 +243,7 @@ perf_header__adds_write(struct perf_header *self, int fd) 


		/* Write build-ids */

		buildid_sec->offset = lseek(fd, 0, SEEK_CUR);

		if (write_buildid_table(fd, &id_list) < 0)

		if (dsos__write_buildid_table(fd) < 0)

			die("failed to write buildid table");

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

	}

tools/perf/util/symbol.c

+9 −28
Original line number Diff line number Diff line
@@ -883,38 +883,19 @@ static int dso__load_sym(struct dso *self, struct map *map, const char *name, 
	return err;

}



bool fetch_build_id_table(struct list_head *head)

bool dsos__read_build_ids(void)

{

	bool have_buildid = false;

	bool have_build_id = false;

	struct dso *pos;



	list_for_each_entry(pos, &dsos, node) {

		struct build_id_list *new;

		struct build_id_event b;

		size_t len;



		if (filename__read_build_id(pos->long_name,

					    &b.build_id,

					    sizeof(b.build_id)) < 0)

			continue;

		have_buildid = true;

		memset(&b.header, 0, sizeof(b.header));

		len = pos->long_name_len + 1;

		len = ALIGN(len, 64);

		b.header.size = sizeof(b) + len;



		new = malloc(sizeof(*new));

		if (!new)

			die("No memory\n");



		memcpy(&new->event, &b, sizeof(b));

		new->dso_name = pos->long_name;

		new->len = len;



		list_add_tail(&new->list, head);

	list_for_each_entry(pos, &dsos, node)

		if (filename__read_build_id(pos->long_name, pos->build_id,

					    sizeof(pos->build_id)) > 0) {

			have_build_id	  = true;

			pos->has_build_id = true;

		}



	return have_buildid;

	return have_build_id;

}



int filename__read_build_id(const char *filename, void *bf, size_t size)

tools/perf/util/symbol.h

+1 −1
Original line number Diff line number Diff line
@@ -89,7 +89,7 @@ char dso__symtab_origin(const struct dso *self); 
void dso__set_build_id(struct dso *self, void *build_id);



int filename__read_build_id(const char *filename, void *bf, size_t size);

bool fetch_build_id_table(struct list_head *head);

bool dsos__read_build_ids(void);

int build_id__sprintf(u8 *self, int len, char *bf);



int load_kernel(symbol_filter_t filter);