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395 lines
9.3 KiB
395 lines
9.3 KiB
// 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 <stdlib.h> |
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#include <string.h> |
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#include <linux/bitops.h> |
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#include <linux/kernel.h> |
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#include <linux/types.h> |
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#include "map_symbol.h" |
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#include "branch.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 "util/synthetic-events.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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COMP(branch_stack->hw_idx); |
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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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if (type & PERF_SAMPLE_CGROUP) |
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COMP(cgroup); |
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if (type & PERF_SAMPLE_DATA_PAGE_SIZE) |
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COMP(data_page_size); |
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if (type & PERF_SAMPLE_CODE_PAGE_SIZE) |
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COMP(code_page_size); |
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if (type & PERF_SAMPLE_AUX) { |
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COMP(aux_sample.size); |
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if (memcmp(s1->aux_sample.data, s2->aux_sample.data, |
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s1->aux_sample.size)) { |
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pr_debug("Samples differ at 'aux_sample'\n"); |
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return false; |
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} |
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} |
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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 evsel evsel = { |
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.needs_swap = false, |
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.core = { |
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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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}; |
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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, -1ULL, 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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const u64 aux_data[] = {0xa55a, 0, 0xeeddee, 0x0282028202820282}; |
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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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.no_hw_idx = false, |
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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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.cgroup = 114, |
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.data_page_size = 115, |
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.code_page_size = 116, |
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.aux_sample = { |
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.size = sizeof(aux_data), |
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.data = (void *)aux_data, |
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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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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.core.attr.sample_regs_user = sample_regs; |
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if (sample_type & PERF_SAMPLE_REGS_INTR) |
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evsel.core.attr.sample_regs_intr = sample_regs; |
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if (sample_type & PERF_SAMPLE_BRANCH_STACK) |
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evsel.core.attr.branch_sample_type |= PERF_SAMPLE_BRANCH_HW_INDEX; |
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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 = __evsel__sample_size(sample_type); |
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err = 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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"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_WEIGHT_STRUCT << 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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/* |
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* Test all sample format bits together |
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* Note: PERF_SAMPLE_WEIGHT and PERF_SAMPLE_WEIGHT_STRUCT cannot |
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* be set simultaneously. |
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*/ |
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sample_type = (PERF_SAMPLE_MAX - 1) & ~PERF_SAMPLE_WEIGHT; |
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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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