// SPDX-License-Identifier: GPL-2.0
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#include <stdbool.h>
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#include <inttypes.h>
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#include <linux/kernel.h>
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#include <linux/types.h>
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#include "util.h"
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#include "event.h"
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#include "evsel.h"
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#include "debug.h"
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#include "tests.h"
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#define COMP(m) do { \
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if (s1->m != s2->m) { \
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pr_debug("Samples differ at '"#m"'\n"); \
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return false; \
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} \
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} while (0)
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#define MCOMP(m) do { \
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if (memcmp(&s1->m, &s2->m, sizeof(s1->m))) { \
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pr_debug("Samples differ at '"#m"'\n"); \
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return false; \
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} \
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} while (0)
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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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{
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size_t i;
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if (type & PERF_SAMPLE_IDENTIFIER)
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COMP(id);
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if (type & PERF_SAMPLE_IP)
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COMP(ip);
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if (type & PERF_SAMPLE_TID) {
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COMP(pid);
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COMP(tid);
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}
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if (type & PERF_SAMPLE_TIME)
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COMP(time);
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if (type & PERF_SAMPLE_ADDR)
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COMP(addr);
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if (type & PERF_SAMPLE_ID)
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COMP(id);
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if (type & PERF_SAMPLE_STREAM_ID)
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COMP(stream_id);
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if (type & PERF_SAMPLE_CPU)
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COMP(cpu);
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if (type & PERF_SAMPLE_PERIOD)
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COMP(period);
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if (type & PERF_SAMPLE_READ) {
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if (read_format & PERF_FORMAT_GROUP)
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COMP(read.group.nr);
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else
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COMP(read.one.value);
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if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
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COMP(read.time_enabled);
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if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
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COMP(read.time_running);
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/* PERF_FORMAT_ID is forced for PERF_SAMPLE_READ */
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if (read_format & PERF_FORMAT_GROUP) {
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for (i = 0; i < s1->read.group.nr; i++)
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MCOMP(read.group.values[i]);
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} else {
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COMP(read.one.id);
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}
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}
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if (type & PERF_SAMPLE_CALLCHAIN) {
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COMP(callchain->nr);
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for (i = 0; i < s1->callchain->nr; i++)
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COMP(callchain->ips[i]);
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}
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if (type & PERF_SAMPLE_RAW) {
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COMP(raw_size);
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if (memcmp(s1->raw_data, s2->raw_data, s1->raw_size)) {
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pr_debug("Samples differ at 'raw_data'\n");
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return false;
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}
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}
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if (type & PERF_SAMPLE_BRANCH_STACK) {
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COMP(branch_stack->nr);
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for (i = 0; i < s1->branch_stack->nr; i++)
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MCOMP(branch_stack->entries[i]);
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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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COMP(user_regs.mask);
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COMP(user_regs.abi);
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if (s1->user_regs.abi &&
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(!s1->user_regs.regs || !s2->user_regs.regs ||
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memcmp(s1->user_regs.regs, s2->user_regs.regs, sz))) {
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pr_debug("Samples differ at 'user_regs'\n");
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return false;
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}
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}
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if (type & PERF_SAMPLE_STACK_USER) {
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COMP(user_stack.size);
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if (memcmp(s1->user_stack.data, s2->user_stack.data,
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s1->user_stack.size)) {
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pr_debug("Samples differ at 'user_stack'\n");
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return false;
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}
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}
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if (type & PERF_SAMPLE_WEIGHT)
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COMP(weight);
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if (type & PERF_SAMPLE_DATA_SRC)
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COMP(data_src);
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if (type & PERF_SAMPLE_TRANSACTION)
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COMP(transaction);
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if (type & PERF_SAMPLE_REGS_INTR) {
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size_t sz = hweight_long(s1->intr_regs.mask) * sizeof(u64);
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COMP(intr_regs.mask);
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COMP(intr_regs.abi);
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if (s1->intr_regs.abi &&
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(!s1->intr_regs.regs || !s2->intr_regs.regs ||
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memcmp(s1->intr_regs.regs, s2->intr_regs.regs, sz))) {
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pr_debug("Samples differ at 'intr_regs'\n");
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return false;
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}
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}
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if (type & PERF_SAMPLE_PHYS_ADDR)
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COMP(phys_addr);
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return true;
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}
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static int do_test(u64 sample_type, u64 sample_regs, u64 read_format)
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{
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struct perf_evsel evsel = {
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.needs_swap = false,
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.attr = {
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.sample_type = sample_type,
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.read_format = read_format,
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},
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};
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union perf_event *event;
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union {
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struct ip_callchain callchain;
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u64 data[64];
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} callchain = {
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/* 3 ips */
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.data = {3, 201, 202, 203},
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};
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union {
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struct branch_stack branch_stack;
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u64 data[64];
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} branch_stack = {
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/* 1 branch_entry */
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.data = {1, 211, 212, 213},
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};
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u64 regs[64];
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const u32 raw_data[] = {0x12345678, 0x0a0b0c0d, 0x11020304, 0x05060708, 0 };
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const u64 data[] = {0x2211443366558877ULL, 0, 0xaabbccddeeff4321ULL};
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struct perf_sample sample = {
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.ip = 101,
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.pid = 102,
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.tid = 103,
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.time = 104,
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.addr = 105,
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.id = 106,
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.stream_id = 107,
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.period = 108,
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.weight = 109,
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.cpu = 110,
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.raw_size = sizeof(raw_data),
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.data_src = 111,
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.transaction = 112,
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.raw_data = (void *)raw_data,
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.callchain = &callchain.callchain,
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.branch_stack = &branch_stack.branch_stack,
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.user_regs = {
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.abi = PERF_SAMPLE_REGS_ABI_64,
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.mask = sample_regs,
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.regs = regs,
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},
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.user_stack = {
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.size = sizeof(data),
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.data = (void *)data,
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},
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.read = {
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.time_enabled = 0x030a59d664fca7deULL,
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.time_running = 0x011b6ae553eb98edULL,
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},
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.intr_regs = {
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.abi = PERF_SAMPLE_REGS_ABI_64,
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.mask = sample_regs,
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.regs = regs,
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},
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.phys_addr = 113,
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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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size_t i, sz, bufsz;
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int err, ret = -1;
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if (sample_type & PERF_SAMPLE_REGS_USER)
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evsel.attr.sample_regs_user = sample_regs;
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if (sample_type & PERF_SAMPLE_REGS_INTR)
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evsel.attr.sample_regs_intr = sample_regs;
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for (i = 0; i < sizeof(regs); i++)
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*(i + (u8 *)regs) = i & 0xfe;
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if (read_format & PERF_FORMAT_GROUP) {
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sample.read.group.nr = 4;
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sample.read.group.values = values;
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} else {
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sample.read.one.value = 0x08789faeb786aa87ULL;
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sample.read.one.id = 99;
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}
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sz = perf_event__sample_event_size(&sample, sample_type, read_format);
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bufsz = sz + 4096; /* Add a bit for overrun checking */
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event = malloc(bufsz);
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if (!event) {
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pr_debug("malloc failed\n");
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return -1;
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}
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memset(event, 0xff, bufsz);
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event->header.type = PERF_RECORD_SAMPLE;
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event->header.misc = 0;
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event->header.size = sz;
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err = perf_event__synthesize_sample(event, sample_type, read_format,
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&sample);
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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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"perf_event__synthesize_sample", sample_type, err);
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goto out_free;
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}
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/* The data does not contain 0xff so we use that to check the size */
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for (i = bufsz; i > 0; i--) {
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if (*(i - 1 + (u8 *)event) != 0xff)
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break;
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}
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if (i != sz) {
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pr_debug("Event size mismatch: actual %zu vs expected %zu\n",
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i, sz);
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goto out_free;
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}
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evsel.sample_size = __perf_evsel__sample_size(sample_type);
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err = perf_evsel__parse_sample(&evsel, event, &sample_out);
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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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"perf_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, sample_type, read_format)) {
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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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ret = 0;
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out_free:
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free(event);
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if (ret && read_format)
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pr_debug("read_format %#"PRIx64"\n", read_format);
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return ret;
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}
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/**
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* test__sample_parsing - test sample parsing.
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*
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* This function implements a test that synthesizes a sample event, parses it
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* and then checks that the parsed sample matches the original sample. The test
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* checks sample format bits separately and together. If the test passes %0 is
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* returned, otherwise %-1 is returned.
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*/
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int test__sample_parsing(struct test *test __maybe_unused, int subtest __maybe_unused)
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{
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const u64 rf[] = {4, 5, 6, 7, 12, 13, 14, 15};
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u64 sample_type;
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u64 sample_regs;
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size_t i;
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int err;
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/*
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* Fail the test if it has not been updated when new sample format bits
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* were added. Please actually update the test rather than just change
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* the condition below.
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*/
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if (PERF_SAMPLE_MAX > PERF_SAMPLE_PHYS_ADDR << 1) {
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pr_debug("sample format has changed, some new PERF_SAMPLE_ bit was introduced - test needs updating\n");
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return -1;
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}
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/* Test each sample format bit separately */
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for (sample_type = 1; sample_type != PERF_SAMPLE_MAX;
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sample_type <<= 1) {
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/* Test read_format variations */
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if (sample_type == PERF_SAMPLE_READ) {
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for (i = 0; i < ARRAY_SIZE(rf); i++) {
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err = do_test(sample_type, 0, rf[i]);
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if (err)
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return err;
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}
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continue;
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}
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sample_regs = 0;
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if (sample_type == PERF_SAMPLE_REGS_USER)
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sample_regs = 0x3fff;
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if (sample_type == PERF_SAMPLE_REGS_INTR)
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sample_regs = 0xff0fff;
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err = do_test(sample_type, sample_regs, 0);
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if (err)
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return err;
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}
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/* Test all sample format bits together */
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sample_type = PERF_SAMPLE_MAX - 1;
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sample_regs = 0x3fff; /* shared yb intr and user regs */
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for (i = 0; i < ARRAY_SIZE(rf); i++) {
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err = do_test(sample_type, sample_regs, rf[i]);
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if (err)
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return err;
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}
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return 0;
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}
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