perf tools: Introduce perf_session class
That does all the initialization boilerplate, opening the file,
reading the header, checking if it is valid, etc.
And that will as well have the threads list, kmap (now) global
variable, etc, so that we can handle two (or more) perf.data files
describing sessions to compare.
Signed-off-by: Arnaldo 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: <1260573842-19720-1-git-send-email-acme@infradead.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/tools/perf/builtin-buildid-list.c b/tools/perf/builtin-buildid-list.c
index dcb6143..bfd16a1 100644
--- a/tools/perf/builtin-buildid-list.c
+++ b/tools/perf/builtin-buildid-list.c
@@ -11,8 +11,8 @@
#include "util/cache.h"
#include "util/data_map.h"
#include "util/debug.h"
-#include "util/header.h"
#include "util/parse-options.h"
+#include "util/session.h"
#include "util/symbol.h"
static char const *input_name = "perf.data";
@@ -55,56 +55,17 @@
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);
+ struct perf_session *session = perf_session__new(input_name, O_RDONLY, force);
- 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;
- }
+ if (session == NULL)
+ return -1;
- 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,
+ err = perf_header__process_sections(&session->header, session->fd,
perf_file_section__process_buildids);
+ if (err >= 0)
+ dsos__fprintf_buildid(stdout);
- if (err < 0)
- goto out_close;
-
- dsos__fprintf_buildid(stdout);
-out_close:
- close(input);
-out:
+ perf_session__delete(session);
return err;
}