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Commit c34984b2 authored by Arnaldo Carvalho de Melo's avatar Arnaldo Carvalho de Melo Committed by Ingo Molnar
Browse files

perf buildid-list: New plumbing command 



With this we can list the buildids in a perf.data file so that
we can pipe them to other, distro specific tools that from the
buildids can figure out separate packages (foo-debuginfo) where
we can find the matching symtabs so that perf report can do its
job.

E.g:

[acme@doppio linux-2.6-tip]$ perf buildid-list | head -5
8e08b117e5458ad3f85da16d42d0fc5cd21c5869
520c2387a587cc5acfcf881e27dba1caaeab4b1f
ec8dd400904ddfcac8b1c343263a790f977159dc
7caedbca5a6d8ab39a7fe44bd28c07d3e14a3f3f
379bb828fd08859dbea73279f04abefabc95a6a3
[acme@doppio linux-2.6-tip]$ perf buildid-list -v | head -5
8e08b117e5458ad3f85da16d42d0fc5cd21c5869 /sbin/init
520c2387a587cc5acfcf881e27dba1caaeab4b1f /lib64/ld-2.10.1.so
ec8dd400904ddfcac8b1c343263a790f977159dc /lib64/libc-2.10.1.so
7caedbca5a6d8ab39a7fe44bd28c07d3e14a3f3f /sbin/udevd
379bb828fd08859dbea73279f04abefabc95a6a3 /lib64/libdl-2.10.1.so
[acme@doppio linux-2.6-tip]$

Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
LKML-Reference: <1258396365-29217-5-git-send-email-acme@infradead.org>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent 9e03eb2d

tools/perf/Documentation/perf-buildid-list.txt

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perf-buildid-list(1)

====================



NAME

----

perf-buildid-list - List the buildids in a perf.data file



SYNOPSIS

--------

[verse]

'perf buildid-list <options>'



DESCRIPTION

-----------

This command displays the buildids found in a perf.data file, so that other

tools can be used to fetch packages with matching symbol tables for use by

perf report.



OPTIONS

-------

-i::

--input=::

        Input file name. (default: perf.data)

-f::

--force::

	Don't do ownership validation.

-v::

--verbose::

	Be more verbose, showing the name of the DSOs after the buildids.



SEE ALSO

--------

linkperf:perf-record[1], linkperf:perf-top[1],

linkperf:perf-report[1]

tools/perf/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -430,6 +430,7 @@ BUILTIN_OBJS += bench/sched-pipe.o 


BUILTIN_OBJS += builtin-help.o

BUILTIN_OBJS += builtin-sched.o

BUILTIN_OBJS += builtin-buildid-list.o

BUILTIN_OBJS += builtin-list.o

BUILTIN_OBJS += builtin-record.o

BUILTIN_OBJS += builtin-report.o

tools/perf/builtin-buildid-list.c

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/*

 * builtin-buildid-list.c

 *

 * Builtin buildid-list command: list buildids in perf.data

 *

 * Copyright (C) 2009, Red Hat Inc.

 * Copyright (C) 2009, Arnaldo Carvalho de Melo <acme@redhat.com>

 */

#include "builtin.h"

#include "perf.h"

#include "util/cache.h"

#include "util/data_map.h"

#include "util/debug.h"

#include "util/header.h"

#include "util/parse-options.h"

#include "util/symbol.h"



static char const *input_name = "perf.data";

static int force;



static const char *const buildid_list_usage[] = {

	"perf report [<options>]",

	NULL

};



static const struct option options[] = {

	OPT_STRING('i', "input", &input_name, "file",

		    "input file name"),

	OPT_BOOLEAN('f', "force", &force, "don't complain, do it"),

	OPT_BOOLEAN('v', "verbose", &verbose,

		    "be more verbose (show counter open errors, etc)"),

	OPT_END()

};



static int perf_file_section__process_buildids(struct perf_file_section *self,

					       int feat, int fd)

{

	if (feat != HEADER_BUILD_ID)

		return 0;



	if (lseek(fd, self->offset, SEEK_SET) < 0) {

		pr_warning("Failed to lseek to %Ld offset for buildids!\n",

			   self->offset);

		return -1;

	}



	if (perf_header__read_build_ids(fd, self->offset, self->size)) {

		pr_warning("Failed to read buildids!\n");

		return -1;

	}



	return 0;

}



static int __cmd_buildid_list(void)

{

	int err = -1;

	struct perf_header *header;

	struct perf_file_header f_header;

	struct stat input_stat;

	int input = open(input_name, O_RDONLY);



	if (input < 0) {

		pr_err("failed to open file: %s", input_name);

		if (!strcmp(input_name, "perf.data"))

			pr_err("  (try 'perf record' first)");

		pr_err("\n");

		goto out;

	}



	err = fstat(input, &input_stat);

	if (err < 0) {

		perror("failed to stat file");

		goto out_close;

	}



	if (!force && input_stat.st_uid && (input_stat.st_uid != geteuid())) {

		pr_err("file %s not owned by current user or root\n",

		       input_name);

		goto out_close;

	}



	if (!input_stat.st_size) {

		pr_info("zero-sized file, nothing to do!\n");

		goto out_close;

	}



	err = -1;

	header = perf_header__new();

	if (header == NULL)

		goto out_close;



	if (perf_file_header__read(&f_header, header, input) < 0) {

		pr_warning("incompatible file format");

		goto out_close;

	}



	err = perf_header__process_sections(header, input,

				         perf_file_section__process_buildids);



	if (err < 0)

		goto out_close;



	dsos__fprintf_buildid(stdout);

out_close:

	close(input);

out:

	return err;

}



int cmd_buildid_list(int argc, const char **argv, const char *prefix __used)

{

	argc = parse_options(argc, argv, options, buildid_list_usage, 0);

	setup_pager();

	return __cmd_buildid_list();

}

tools/perf/builtin.h

+1 −0
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@@ -16,6 +16,7 @@ extern int check_pager_config(const char *cmd); 


extern int cmd_annotate(int argc, const char **argv, const char *prefix);

extern int cmd_bench(int argc, const char **argv, const char *prefix);

extern int cmd_buildid_list(int argc, const char **argv, const char *prefix);

extern int cmd_help(int argc, const char **argv, const char *prefix);

extern int cmd_sched(int argc, const char **argv, const char *prefix);

extern int cmd_list(int argc, const char **argv, const char *prefix);

tools/perf/command-list.txt

+1 −0
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@@ -4,6 +4,7 @@ 
#

perf-annotate			mainporcelain common

perf-bench			mainporcelain common

perf-buildid-list		mainporcelain common

perf-list			mainporcelain common

perf-sched			mainporcelain common

perf-record			mainporcelain common