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authorRobert Richter <robert.richter@amd.com>2011-12-07 10:02:55 +0100
committerArnaldo Carvalho de Melo <acme@redhat.com>2011-12-23 17:02:22 -0200
commite20960c0271f91aead94746872fd976326a703b3 (patch)
treefdc1b932114df3a9e155e9f36cda93a4c11537ad /tools/perf/builtin-record.c
parentefad14150a0b4429f37da7245001a8096ef7ee38 (diff)
perf tools: Unify handling of features when writing feature section
The features HEADER_TRACE_INFO and HEADER_BUILD_ID are handled different when writing the feature section. All other features are simply disabled on failure and writing the section goes on without returning an error. There is no reason for these special cases. This patch unifies handling of the features. This should be ok since all features can be parsed independently. Offset and size of a feature's block is stored in struct perf_file_ section right after the data block of perf.data (see perf_session__ write_header()). Thus, if a feature does not exist then other features can be processed anyway. Also moving special code for HEADER_BUILD_ID out to write_build_id(). v2: * perf record throws an error now if buildids may not be generated, which can be disabled with the --no-buildid option. Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/r/1323248577-11268-6-git-send-email-robert.richter@amd.com Signed-off-by: Robert Richter <robert.richter@amd.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/builtin-record.c')
-rw-r--r--tools/perf/builtin-record.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index e873ae2dd54..0abfb18b911 100644
--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c
@@ -503,6 +503,13 @@ static int __cmd_record(struct perf_record *rec, int argc, const char **argv)
return err;
}
+ if (!!rec->no_buildid
+ && !perf_header__has_feat(&session->header, HEADER_BUILD_ID)) {
+ pr_err("Couldn't generating buildids. "
+ "Use --no-buildid to profile anyway.\n");
+ return -1;
+ }
+
rec->post_processing_offset = lseek(output, 0, SEEK_CUR);
machine = perf_session__find_host_machine(session);