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Diffstat (limited to 'tools/perf/util/evsel.c')
-rw-r--r--tools/perf/util/evsel.c88
1 files changed, 82 insertions, 6 deletions
diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c
index 1506ba0453f1..00936ad29ff2 100644
--- a/tools/perf/util/evsel.c
+++ b/tools/perf/util/evsel.c
@@ -10,6 +10,7 @@
#include <byteswap.h>
#include <linux/bitops.h>
#include "asm/bug.h"
+#include "debugfs.h"
#include "event-parse.h"
#include "evsel.h"
#include "evlist.h"
@@ -69,6 +70,72 @@ struct perf_evsel *perf_evsel__new(struct perf_event_attr *attr, int idx)
return evsel;
}
+static struct event_format *event_format__new(const char *sys, const char *name)
+{
+ int fd, n;
+ char *filename;
+ void *bf = NULL, *nbf;
+ size_t size = 0, alloc_size = 0;
+ struct event_format *format = NULL;
+
+ if (asprintf(&filename, "%s/%s/%s/format", tracing_events_path, sys, name) < 0)
+ goto out;
+
+ fd = open(filename, O_RDONLY);
+ if (fd < 0)
+ goto out_free_filename;
+
+ do {
+ if (size == alloc_size) {
+ alloc_size += BUFSIZ;
+ nbf = realloc(bf, alloc_size);
+ if (nbf == NULL)
+ goto out_free_bf;
+ bf = nbf;
+ }
+
+ n = read(fd, bf + size, BUFSIZ);
+ if (n < 0)
+ goto out_free_bf;
+ size += n;
+ } while (n > 0);
+
+ pevent_parse_format(&format, bf, size, sys);
+
+out_free_bf:
+ free(bf);
+ close(fd);
+out_free_filename:
+ free(filename);
+out:
+ return format;
+}
+
+struct perf_evsel *perf_evsel__newtp(const char *sys, const char *name, int idx)
+{
+ struct perf_evsel *evsel = zalloc(sizeof(*evsel));
+
+ if (evsel != NULL) {
+ struct perf_event_attr attr = {
+ .type = PERF_TYPE_TRACEPOINT,
+ };
+
+ evsel->tp_format = event_format__new(sys, name);
+ if (evsel->tp_format == NULL)
+ goto out_free;
+
+ attr.config = evsel->tp_format->id;
+ perf_evsel__init(evsel, &attr, idx);
+ evsel->name = evsel->tp_format->name;
+ }
+
+ return evsel;
+
+out_free:
+ free(evsel);
+ return NULL;
+}
+
const char *perf_evsel__hw_names[PERF_COUNT_HW_MAX] = {
"cycles",
"instructions",
@@ -495,6 +562,10 @@ void perf_evsel__delete(struct perf_evsel *evsel)
perf_evsel__exit(evsel);
close_cgroup(evsel->cgrp);
free(evsel->group_name);
+ if (evsel->tp_format && evsel->name == evsel->tp_format->name) {
+ evsel->name = NULL;
+ pevent_free_format(evsel->tp_format);
+ }
free(evsel->name);
free(evsel);
}
@@ -1002,14 +1073,19 @@ int perf_event__synthesize_sample(union perf_event *event, u64 type,
return 0;
}
+struct format_field *perf_evsel__field(struct perf_evsel *evsel, const char *name)
+{
+ return pevent_find_field(evsel->tp_format, name);
+}
+
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);
+ struct format_field *field = perf_evsel__field(evsel, name);
int offset;
- if (!field)
- return NULL;
+ if (!field)
+ return NULL;
offset = field->offset;
@@ -1024,11 +1100,11 @@ char *perf_evsel__strval(struct perf_evsel *evsel, struct perf_sample *sample,
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);
+ struct format_field *field = perf_evsel__field(evsel, name);
u64 val;
- if (!field)
- return 0;
+ if (!field)
+ return 0;
val = pevent_read_number(evsel->tp_format->pevent,
sample->raw_data + field->offset, field->size);