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: Arnaldo 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: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Arnaldo Carvalho de Melo 2009-11-16 16:32:45 -02:00 committed by Ingo Molnar
parent 9e03eb2d51
commit c34984b2bb
6 changed files with 154 additions and 0 deletions

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@ -0,0 +1,34 @@
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]

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@ -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

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@ -0,0 +1,116 @@
/*
* 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();
}

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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);

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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

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@ -287,6 +287,7 @@ static void handle_internal_command(int argc, const char **argv)
static struct cmd_struct commands[] = {
{ "help", cmd_help, 0 },
{ "list", cmd_list, 0 },
{ "buildid-list", cmd_buildid_list, 0 },
{ "record", cmd_record, 0 },
{ "report", cmd_report, 0 },
{ "bench", cmd_bench, 0 },