perf buildid-list: New plumbing command
Arnaldo Carvalho de Melo [Mon, 16 Nov 2009 18:32:45 +0000 (16:32 -0200)]
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>

tools/perf/Documentation/perf-buildid-list.txt [new file with mode: 0644]
tools/perf/Makefile
tools/perf/builtin-buildid-list.c [new file with mode: 0644]
tools/perf/builtin.h
tools/perf/command-list.txt
tools/perf/perf.c

diff --git a/tools/perf/Documentation/perf-buildid-list.txt b/tools/perf/Documentation/perf-buildid-list.txt
new file mode 100644 (file)
index 0000000..abab34e
--- /dev/null
@@ -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]
index f7cd896..46a58a8 100644 (file)
@@ -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
diff --git a/tools/perf/builtin-buildid-list.c b/tools/perf/builtin-buildid-list.c
new file mode 100644 (file)
index 0000000..2e377e1
--- /dev/null
@@ -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();
+}
index f0cd5b1..e97954a 100644 (file)
@@ -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);
index 981c40b..d37b16c 100644 (file)
@@ -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
index 8936786..53359eb 100644 (file)
@@ -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 },