--- /dev/null
+#include <stdbool.h>
+#include <linux/types.h>
+
+#include "util.h"
+#include "event.h"
+#include "evsel.h"
+#include "debug.h"
+
+#include "tests.h"
+
+#define COMP(m) do { \
+ if (s1->m != s2->m) { \
+ pr_debug("Samples differ at '"#m"'\n"); \
+ return false; \
+ } \
+} while (0)
+
+#define MCOMP(m) do { \
+ if (memcmp(&s1->m, &s2->m, sizeof(s1->m))) { \
+ pr_debug("Samples differ at '"#m"'\n"); \
+ return false; \
+ } \
+} while (0)
+
+static bool samples_same(const struct perf_sample *s1,
+ const struct perf_sample *s2,
+ u64 type, u64 read_format)
+{
+ size_t i;
+
+ if (type & PERF_SAMPLE_IDENTIFIER)
+ COMP(id);
+
+ if (type & PERF_SAMPLE_IP)
+ COMP(ip);
+
+ if (type & PERF_SAMPLE_TID) {
+ COMP(pid);
+ COMP(tid);
+ }
+
+ if (type & PERF_SAMPLE_TIME)
+ COMP(time);
+
+ if (type & PERF_SAMPLE_ADDR)
+ COMP(addr);
+
+ if (type & PERF_SAMPLE_ID)
+ COMP(id);
+
+ if (type & PERF_SAMPLE_STREAM_ID)
+ COMP(stream_id);
+
+ if (type & PERF_SAMPLE_CPU)
+ COMP(cpu);
+
+ if (type & PERF_SAMPLE_PERIOD)
+ COMP(period);
+
+ if (type & PERF_SAMPLE_READ) {
+ if (read_format & PERF_FORMAT_GROUP)
+ COMP(read.group.nr);
+ else
+ COMP(read.one.value);
+ if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
+ COMP(read.time_enabled);
+ if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
+ COMP(read.time_running);
+ /* PERF_FORMAT_ID is forced for PERF_SAMPLE_READ */
+ if (read_format & PERF_FORMAT_GROUP) {
+ for (i = 0; i < s1->read.group.nr; i++)
+ MCOMP(read.group.values[i]);
+ } else {
+ COMP(read.one.id);
+ }
+ }
+
+ if (type & PERF_SAMPLE_CALLCHAIN) {
+ COMP(callchain->nr);
+ for (i = 0; i < s1->callchain->nr; i++)
+ COMP(callchain->ips[i]);
+ }
+
+ if (type & PERF_SAMPLE_RAW) {
+ COMP(raw_size);
+ if (memcmp(s1->raw_data, s2->raw_data, s1->raw_size)) {
+ pr_debug("Samples differ at 'raw_data'\n");
+ return false;
+ }
+ }
+
+ if (type & PERF_SAMPLE_BRANCH_STACK) {
+ COMP(branch_stack->nr);
+ for (i = 0; i < s1->branch_stack->nr; i++)
+ MCOMP(branch_stack->entries[i]);
+ }
+
+ if (type & PERF_SAMPLE_REGS_USER) {
+ size_t sz = hweight_long(s1->user_regs.mask) * sizeof(u64);
+
+ COMP(user_regs.mask);
+ COMP(user_regs.abi);
+ if (s1->user_regs.abi &&
+ (!s1->user_regs.regs || !s2->user_regs.regs ||
+ memcmp(s1->user_regs.regs, s2->user_regs.regs, sz))) {
+ pr_debug("Samples differ at 'user_regs'\n");
+ return false;
+ }
+ }
+
+ if (type & PERF_SAMPLE_STACK_USER) {
+ COMP(user_stack.size);
+ if (memcmp(s1->user_stack.data, s2->user_stack.data,
+ s1->user_stack.size)) {
+ pr_debug("Samples differ at 'user_stack'\n");
+ return false;
+ }
+ }
+
+ if (type & PERF_SAMPLE_WEIGHT)
+ COMP(weight);
+
+ if (type & PERF_SAMPLE_DATA_SRC)
+ COMP(data_src);
+
+ if (type & PERF_SAMPLE_TRANSACTION)
+ COMP(transaction);
+
+ if (type & PERF_SAMPLE_REGS_INTR) {
+ size_t sz = hweight_long(s1->intr_regs.mask) * sizeof(u64);
+
+ COMP(intr_regs.mask);
+ COMP(intr_regs.abi);
+ if (s1->intr_regs.abi &&
+ (!s1->intr_regs.regs || !s2->intr_regs.regs ||
+ memcmp(s1->intr_regs.regs, s2->intr_regs.regs, sz))) {
+ pr_debug("Samples differ at 'intr_regs'\n");
+ return false;
+ }
+ }
+
+ return true;
+}
+
+static int do_test(u64 sample_type, u64 sample_regs, u64 read_format)
+{
+ struct perf_evsel evsel = {
+ .needs_swap = false,
+ .attr = {
+ .sample_type = sample_type,
+ .read_format = read_format,
+ },
+ };
+ union perf_event *event;
+ union {
+ struct ip_callchain callchain;
+ u64 data[64];
+ } callchain = {
+ /* 3 ips */
+ .data = {3, 201, 202, 203},
+ };
+ union {
+ struct branch_stack branch_stack;
+ u64 data[64];
+ } branch_stack = {
+ /* 1 branch_entry */
+ .data = {1, 211, 212, 213},
+ };
+ u64 regs[64];
+ const u64 raw_data[] = {0x123456780a0b0c0dULL, 0x1102030405060708ULL};
+ const u64 data[] = {0x2211443366558877ULL, 0, 0xaabbccddeeff4321ULL};
+ struct perf_sample sample = {
+ .ip = 101,
+ .pid = 102,
+ .tid = 103,
+ .time = 104,
+ .addr = 105,
+ .id = 106,
+ .stream_id = 107,
+ .period = 108,
+ .weight = 109,
+ .cpu = 110,
+ .raw_size = sizeof(raw_data),
+ .data_src = 111,
+ .transaction = 112,
+ .raw_data = (void *)raw_data,
+ .callchain = &callchain.callchain,
+ .branch_stack = &branch_stack.branch_stack,
+ .user_regs = {
+ .abi = PERF_SAMPLE_REGS_ABI_64,
+ .mask = sample_regs,
+ .regs = regs,
+ },
+ .user_stack = {
+ .size = sizeof(data),
+ .data = (void *)data,
+ },
+ .read = {
+ .time_enabled = 0x030a59d664fca7deULL,
+ .time_running = 0x011b6ae553eb98edULL,
+ },
+ .intr_regs = {
+ .abi = PERF_SAMPLE_REGS_ABI_64,
+ .mask = sample_regs,
+ .regs = regs,
+ },
+ };
+ struct sample_read_value values[] = {{1, 5}, {9, 3}, {2, 7}, {6, 4},};
+ struct perf_sample sample_out;
+ size_t i, sz, bufsz;
+ int err, ret = -1;
+
+ if (sample_type & PERF_SAMPLE_REGS_USER)
+ evsel.attr.sample_regs_user = sample_regs;
+
+ if (sample_type & PERF_SAMPLE_REGS_INTR)
+ evsel.attr.sample_regs_intr = sample_regs;
+
+ for (i = 0; i < sizeof(regs); i++)
+ *(i + (u8 *)regs) = i & 0xfe;
+
+ if (read_format & PERF_FORMAT_GROUP) {
+ sample.read.group.nr = 4;
+ sample.read.group.values = values;
+ } else {
+ sample.read.one.value = 0x08789faeb786aa87ULL;
+ sample.read.one.id = 99;
+ }
+
+ sz = perf_event__sample_event_size(&sample, sample_type, read_format);
+ bufsz = sz + 4096; /* Add a bit for overrun checking */
+ event = malloc(bufsz);
+ if (!event) {
+ pr_debug("malloc failed\n");
+ return -1;
+ }
+
+ memset(event, 0xff, bufsz);
+ event->header.type = PERF_RECORD_SAMPLE;
+ event->header.misc = 0;
+ event->header.size = sz;
+
+ err = perf_event__synthesize_sample(event, sample_type, read_format,
+ &sample, false);
+ if (err) {
+ pr_debug("%s failed for sample_type %#"PRIx64", error %d\n",
+ "perf_event__synthesize_sample", sample_type, err);
+ goto out_free;
+ }
+
+ /* The data does not contain 0xff so we use that to check the size */
+ for (i = bufsz; i > 0; i--) {
+ if (*(i - 1 + (u8 *)event) != 0xff)
+ break;
+ }
+ if (i != sz) {
+ pr_debug("Event size mismatch: actual %zu vs expected %zu\n",
+ i, sz);
+ goto out_free;
+ }
+
+ evsel.sample_size = __perf_evsel__sample_size(sample_type);
+
+ err = perf_evsel__parse_sample(&evsel, event, &sample_out);
+ if (err) {
+ pr_debug("%s failed for sample_type %#"PRIx64", error %d\n",
+ "perf_evsel__parse_sample", sample_type, err);
+ goto out_free;
+ }
+
+ if (!samples_same(&sample, &sample_out, sample_type, read_format)) {
+ pr_debug("parsing failed for sample_type %#"PRIx64"\n",
+ sample_type);
+ goto out_free;
+ }
+
+ ret = 0;
+out_free:
+ free(event);
+ if (ret && read_format)
+ pr_debug("read_format %#"PRIx64"\n", read_format);
+ return ret;
+}
+
+/**
+ * test__sample_parsing - test sample parsing.
+ *
+ * This function implements a test that synthesizes a sample event, parses it
+ * and then checks that the parsed sample matches the original sample. The test
+ * checks sample format bits separately and together. If the test passes %0 is
+ * returned, otherwise %-1 is returned.
+ */
+int test__sample_parsing(void)
+{
+ const u64 rf[] = {4, 5, 6, 7, 12, 13, 14, 15};
+ u64 sample_type;
+ u64 sample_regs;
+ size_t i;
+ int err;
+
+ /*
+ * Fail the test if it has not been updated when new sample format bits
+ * were added. Please actually update the test rather than just change
+ * the condition below.
+ */
+ if (PERF_SAMPLE_MAX > PERF_SAMPLE_REGS_INTR << 1) {
+ pr_debug("sample format has changed, some new PERF_SAMPLE_ bit was introduced - test needs updating\n");
+ return -1;
+ }
+
+ /* Test each sample format bit separately */
+ for (sample_type = 1; sample_type != PERF_SAMPLE_MAX;
+ sample_type <<= 1) {
+ /* Test read_format variations */
+ if (sample_type == PERF_SAMPLE_READ) {
+ for (i = 0; i < ARRAY_SIZE(rf); i++) {
+ err = do_test(sample_type, 0, rf[i]);
+ if (err)
+ return err;
+ }
+ continue;
+ }
+ sample_regs = 0;
+
+ if (sample_type == PERF_SAMPLE_REGS_USER)
+ sample_regs = 0x3fff;
+
+ if (sample_type == PERF_SAMPLE_REGS_INTR)
+ sample_regs = 0xff0fff;
+
+ err = do_test(sample_type, sample_regs, 0);
+ if (err)
+ return err;
+ }
+
+ /* Test all sample format bits together */
+ sample_type = PERF_SAMPLE_MAX - 1;
+ sample_regs = 0x3fff; /* shared yb intr and user regs */
+ for (i = 0; i < ARRAY_SIZE(rf); i++) {
+ err = do_test(sample_type, sample_regs, rf[i]);
+ if (err)
+ return err;
+ }
+
+ return 0;
+}
Code Review / kvmfornfv.git / blobdiff