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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>
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parent
63c12ae2f2
commit
10269a2ca2
1 changed files with 38 additions and 5 deletions
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@ -13,6 +13,7 @@
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#include "evsel.h"
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#include "debug.h"
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#include "util/synthetic-events.h"
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#include "util/trace-event.h"
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#include "tests.h"
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@ -30,9 +31,18 @@
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} \
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} while (0)
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/*
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* Hardcode the expected values for branch_entry flags.
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* These are based on the input value (213) specified
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* in branch_stack variable.
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*/
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#define BS_EXPECTED_BE 0xa00d000000000000
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#define BS_EXPECTED_LE 0xd5000000
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#define FLAG(s) s->branch_stack->entries[i].flags
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static bool samples_same(const struct perf_sample *s1,
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const struct perf_sample *s2,
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u64 type, u64 read_format)
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u64 type, u64 read_format, bool needs_swap)
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{
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size_t i;
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@ -100,9 +110,15 @@ static bool samples_same(const struct perf_sample *s1,
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if (type & PERF_SAMPLE_BRANCH_STACK) {
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COMP(branch_stack->nr);
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COMP(branch_stack->hw_idx);
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for (i = 0; i < s1->branch_stack->nr; i++)
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for (i = 0; i < s1->branch_stack->nr; i++) {
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if (needs_swap)
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return ((tep_is_bigendian()) ?
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(FLAG(s2).value == BS_EXPECTED_BE) :
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(FLAG(s2).value == BS_EXPECTED_LE));
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else
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MCOMP(branch_stack->entries[i]);
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}
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}
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if (type & PERF_SAMPLE_REGS_USER) {
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size_t sz = hweight_long(s1->user_regs.mask) * sizeof(u64);
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@ -248,7 +264,7 @@ static int do_test(u64 sample_type, u64 sample_regs, u64 read_format)
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},
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};
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struct sample_read_value values[] = {{1, 5}, {9, 3}, {2, 7}, {6, 4},};
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struct perf_sample sample_out;
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struct perf_sample sample_out, sample_out_endian;
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size_t i, sz, bufsz;
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int err, ret = -1;
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@ -313,12 +329,29 @@ static int do_test(u64 sample_type, u64 sample_regs, u64 read_format)
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goto out_free;
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}
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if (!samples_same(&sample, &sample_out, sample_type, read_format)) {
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if (!samples_same(&sample, &sample_out, sample_type, read_format, evsel.needs_swap)) {
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pr_debug("parsing failed for sample_type %#"PRIx64"\n",
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sample_type);
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goto out_free;
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}
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if (sample_type == PERF_SAMPLE_BRANCH_STACK) {
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evsel.needs_swap = true;
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evsel.sample_size = __evsel__sample_size(sample_type);
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err = evsel__parse_sample(&evsel, event, &sample_out_endian);
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if (err) {
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pr_debug("%s failed for sample_type %#"PRIx64", error %d\n",
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"evsel__parse_sample", sample_type, err);
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goto out_free;
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}
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if (!samples_same(&sample, &sample_out_endian, sample_type, read_format, evsel.needs_swap)) {
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pr_debug("parsing failed for sample_type %#"PRIx64"\n",
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sample_type);
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goto out_free;
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}
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}
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ret = 0;
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out_free:
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free(event);
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