tools/perf/tests/parse-no-sample-id-all.c

Source file repositories/reference/linux-study-clean/tools/perf/tests/parse-no-sample-id-all.c

File Facts

System
Linux kernel
Corpus path
tools/perf/tests/parse-no-sample-id-all.c
Extension
.c
Size
2620 bytes
Lines
114
Domain
Support Tooling And Documentation
Bucket
tools
Inferred role
Support Tooling And Documentation: implementation source
Status
source implementation candidate

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Dependency Surface

Detected Declarations

Annotated Snippet

struct test_attr_event {
	struct perf_event_header header;
	struct perf_event_attr	 attr;
	u64 id;
};

/**
 * test__parse_no_sample_id_all - test parsing with no sample_id_all bit set.
 *
 * This function tests parsing data produced on kernel's that do not support the
 * sample_id_all bit.  Without the sample_id_all bit, non-sample events (such as
 * mmap events) do not have an id sample appended, and consequently logic
 * designed to determine the id will not work.  That case happens when there is
 * more than one selected event, so this test processes three events: 2
 * attributes representing the selected events and one mmap event.
 *
 * Return: %0 on success, %-1 if the test fails.
 */
static int test__parse_no_sample_id_all(struct test_suite *test __maybe_unused,
					int subtest __maybe_unused)
{
	int err;

	struct test_attr_event event1 = {
		.header = {
			.type = PERF_RECORD_HEADER_ATTR,
			.size = sizeof(struct test_attr_event),
		},
		.id = 1,
	};
	struct test_attr_event event2 = {
		.header = {
			.type = PERF_RECORD_HEADER_ATTR,
			.size = sizeof(struct test_attr_event),
		},
		.id = 2,
	};
	struct perf_record_mmap event3 = {
		.header = {
			.type = PERF_RECORD_MMAP,
			.size = sizeof(struct perf_record_mmap),
		},
	};
	union perf_event *events[] = {
		(union perf_event *)&event1,
		(union perf_event *)&event2,
		(union perf_event *)&event3,
	};

	err = process_events(events, ARRAY_SIZE(events));
	if (err)
		return -1;

	return 0;
}

DEFINE_SUITE("Parse with no sample_id_all bit set", parse_no_sample_id_all);

Annotation

Implementation Notes