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perf test sample-parsing: Add endian test for struct branch_flags 

Extend the sample-parsing test to include a branch_flag bitfield-endian
swap test.

This patch adds a include for "util/trace-event.h" in the sample-parsing
test for importing tep_is_bigendian() and extends samples_same() to
include "needs_swap" to detect/enable check for bitfield-endian swap.

Signed-off-by: Madhavan Srinivasan <maddy@linux.ibm.com>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Cc: Athira Jajeev <atrajeev@linux.vnet.ibm.com>
Cc: Kajol Jain <kjain@linux.ibm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Michael Ellerman <michael@ellerman.id.au>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lore.kernel.org/lkml/20211028113714.600549-2-maddy@linux.ibm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Madhavan Srinivasan 2021-10-28 17:07:14 +05:30 committed by Arnaldo Carvalho de Melo
parent 63c12ae2f2
commit 10269a2ca2
1 changed files with 38 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

43
tools/perf/tests/sample-parsing.c
View File

@ -13,6 +13,7 @@
#include "evsel.h"
#include "debug.h"
#include "util/synthetic-events.h"
#include "util/trace-event.h"
#include "tests.h"
@ -30,9 +31,18 @@
} \
} while (0)
/*
* Hardcode the expected values for branch_entry flags.
* These are based on the input value (213) specified
* in branch_stack variable.
*/
#define BS_EXPECTED_BE 0xa00d000000000000
#define BS_EXPECTED_LE 0xd5000000
#define FLAG(s) s->branch_stack->entries[i].flags
static bool samples_same(const struct perf_sample *s1,
const struct perf_sample *s2,
u64 type, u64 read_format)
u64 type, u64 read_format, bool needs_swap)
{
size_t i;
@ -100,8 +110,14 @@ static bool samples_same(const struct perf_sample *s1,
if (type & PERF_SAMPLE_BRANCH_STACK) {
COMP(branch_stack->nr);
COMP(branch_stack->hw_idx);
for (i = 0; i < s1->branch_stack->nr; i++)
MCOMP(branch_stack->entries[i]);
for (i = 0; i < s1->branch_stack->nr; i++) {
if (needs_swap)
return ((tep_is_bigendian()) ?
(FLAG(s2).value == BS_EXPECTED_BE) :
(FLAG(s2).value == BS_EXPECTED_LE));
else
MCOMP(branch_stack->entries[i]);
}
}
if (type & PERF_SAMPLE_REGS_USER) {
@ -248,7 +264,7 @@ static int do_test(u64 sample_type, u64 sample_regs, u64 read_format)
},
};
struct sample_read_value values[] = {{1, 5}, {9, 3}, {2, 7}, {6, 4},};
struct perf_sample sample_out;
struct perf_sample sample_out, sample_out_endian;
size_t i, sz, bufsz;
int err, ret = -1;
@ -313,12 +329,29 @@ static int do_test(u64 sample_type, u64 sample_regs, u64 read_format)
goto out_free;
}
if (!samples_same(&sample, &sample_out, sample_type, read_format)) {
if (!samples_same(&sample, &sample_out, sample_type, read_format, evsel.needs_swap)) {
pr_debug("parsing failed for sample_type %#"PRIx64"\n",
sample_type);
goto out_free;
}
if (sample_type == PERF_SAMPLE_BRANCH_STACK) {
evsel.needs_swap = true;
evsel.sample_size = __evsel__sample_size(sample_type);
err = evsel__parse_sample(&evsel, event, &sample_out_endian);
if (err) {
pr_debug("%s failed for sample_type %#"PRIx64", error %d\n",
"evsel__parse_sample", sample_type, err);
goto out_free;
}
if (!samples_same(&sample, &sample_out_endian, sample_type, read_format, evsel.needs_swap)) {
pr_debug("parsing failed for sample_type %#"PRIx64"\n",
sample_type);
goto out_free;
}
}
ret = 0;
out_free:
free(event);