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perf evsel: Introduce perf_evsel__{str,int}val methods

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Wrappers to the libtraceevent routines, so that we can further reduce
the surface contact perf builtins have with it.

Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-rtmgzptvrifzjxqwb9vs6g1b@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Arnaldo Carvalho de Melo
2012-09-11 19:24:23 -03:00
parent 0e9b07e574
commit 5555ded446
2 changed files with 42 additions and 0 deletions
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35
tools/perf/util/evsel.c
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@@ -10,6 +10,7 @@
#include <byteswap.h>
#include <linux/bitops.h>
#include "asm/bug.h"
#include "event-parse.h"
#include "evsel.h"
#include "evlist.h"
#include "util.h"
@@ -1000,3 +1001,37 @@ int perf_event__synthesize_sample(union perf_event *event, u64 type,
return 0;
}
char *perf_evsel__strval(struct perf_evsel *evsel, struct perf_sample *sample,
const char *name)
{
struct format_field *field = pevent_find_field(evsel->tp_format, name);
int offset;
if (!field)
return NULL;
offset = field->offset;
if (field->flags & FIELD_IS_DYNAMIC) {
offset = *(int *)(sample->raw_data + field->offset);
offset &= 0xffff;
}
return sample->raw_data + offset;
}
u64 perf_evsel__intval(struct perf_evsel *evsel, struct perf_sample *sample,
const char *name)
{
struct format_field *field = pevent_find_field(evsel->tp_format, name);
u64 val;
if (!field)
return 0;
val = pevent_read_number(evsel->tp_format->pevent,
sample->raw_data + field->offset, field->size);
return val;
}