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-rw-r--r--tools/perf/tests/bpf.c389
1 files changed, 0 insertions, 389 deletions
diff --git a/tools/perf/tests/bpf.c b/tools/perf/tests/bpf.c
deleted file mode 100644
index 8beb46066034..000000000000
--- a/tools/perf/tests/bpf.c
+++ /dev/null
@@ -1,389 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-#include <errno.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <sys/epoll.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <fcntl.h>
-#include <util/record.h>
-#include <util/util.h>
-#include <util/bpf-loader.h>
-#include <util/evlist.h>
-#include <linux/filter.h>
-#include <linux/kernel.h>
-#include <linux/string.h>
-#include <api/fs/fs.h>
-#include <perf/mmap.h>
-#include "tests.h"
-#include "llvm.h"
-#include "debug.h"
-#include "parse-events.h"
-#include "util/mmap.h"
-#define NR_ITERS 111
-#define PERF_TEST_BPF_PATH "/sys/fs/bpf/perf_test"
-
-#if defined(HAVE_LIBBPF_SUPPORT) && defined(HAVE_LIBTRACEEVENT)
-#include <linux/bpf.h>
-#include <bpf/bpf.h>
-
-static int epoll_pwait_loop(void)
-{
- int i;
-
- /* Should fail NR_ITERS times */
- for (i = 0; i < NR_ITERS; i++)
- epoll_pwait(-(i + 1), NULL, 0, 0, NULL);
- return 0;
-}
-
-#ifdef HAVE_BPF_PROLOGUE
-
-static int llseek_loop(void)
-{
- int fds[2], i;
-
- fds[0] = open("/dev/null", O_RDONLY);
- fds[1] = open("/dev/null", O_RDWR);
-
- if (fds[0] < 0 || fds[1] < 0)
- return -1;
-
- for (i = 0; i < NR_ITERS; i++) {
- lseek(fds[i % 2], i, (i / 2) % 2 ? SEEK_CUR : SEEK_SET);
- lseek(fds[(i + 1) % 2], i, (i / 2) % 2 ? SEEK_CUR : SEEK_SET);
- }
- close(fds[0]);
- close(fds[1]);
- return 0;
-}
-
-#endif
-
-static struct {
- enum test_llvm__testcase prog_id;
- const char *name;
- const char *msg_compile_fail;
- const char *msg_load_fail;
- int (*target_func)(void);
- int expect_result;
- bool pin;
-} bpf_testcase_table[] = {
- {
- .prog_id = LLVM_TESTCASE_BASE,
- .name = "[basic_bpf_test]",
- .msg_compile_fail = "fix 'perf test LLVM' first",
- .msg_load_fail = "load bpf object failed",
- .target_func = &epoll_pwait_loop,
- .expect_result = (NR_ITERS + 1) / 2,
- },
- {
- .prog_id = LLVM_TESTCASE_BASE,
- .name = "[bpf_pinning]",
- .msg_compile_fail = "fix kbuild first",
- .msg_load_fail = "check your vmlinux setting?",
- .target_func = &epoll_pwait_loop,
- .expect_result = (NR_ITERS + 1) / 2,
- .pin = true,
- },
-#ifdef HAVE_BPF_PROLOGUE
- {
- .prog_id = LLVM_TESTCASE_BPF_PROLOGUE,
- .name = "[bpf_prologue_test]",
- .msg_compile_fail = "fix kbuild first",
- .msg_load_fail = "check your vmlinux setting?",
- .target_func = &llseek_loop,
- .expect_result = (NR_ITERS + 1) / 4,
- },
-#endif
-};
-
-static int do_test(struct bpf_object *obj, int (*func)(void),
- int expect)
-{
- struct record_opts opts = {
- .target = {
- .uid = UINT_MAX,
- .uses_mmap = true,
- },
- .freq = 0,
- .mmap_pages = 256,
- .default_interval = 1,
- };
-
- char pid[16];
- char sbuf[STRERR_BUFSIZE];
- struct evlist *evlist;
- int i, ret = TEST_FAIL, err = 0, count = 0;
-
- struct parse_events_state parse_state;
- struct parse_events_error parse_error;
-
- parse_events_error__init(&parse_error);
- bzero(&parse_state, sizeof(parse_state));
- parse_state.error = &parse_error;
- INIT_LIST_HEAD(&parse_state.list);
-
- err = parse_events_load_bpf_obj(&parse_state, &parse_state.list, obj, NULL);
- parse_events_error__exit(&parse_error);
- if (err == -ENODATA) {
- pr_debug("Failed to add events selected by BPF, debuginfo package not installed\n");
- return TEST_SKIP;
- }
- if (err || list_empty(&parse_state.list)) {
- pr_debug("Failed to add events selected by BPF\n");
- return TEST_FAIL;
- }
-
- snprintf(pid, sizeof(pid), "%d", getpid());
- pid[sizeof(pid) - 1] = '\0';
- opts.target.tid = opts.target.pid = pid;
-
- /* Instead of evlist__new_default, don't add default events */
- evlist = evlist__new();
- if (!evlist) {
- pr_debug("Not enough memory to create evlist\n");
- return TEST_FAIL;
- }
-
- err = evlist__create_maps(evlist, &opts.target);
- if (err < 0) {
- pr_debug("Not enough memory to create thread/cpu maps\n");
- goto out_delete_evlist;
- }
-
- evlist__splice_list_tail(evlist, &parse_state.list);
-
- evlist__config(evlist, &opts, NULL);
-
- err = evlist__open(evlist);
- if (err < 0) {
- pr_debug("perf_evlist__open: %s\n",
- str_error_r(errno, sbuf, sizeof(sbuf)));
- goto out_delete_evlist;
- }
-
- err = evlist__mmap(evlist, opts.mmap_pages);
- if (err < 0) {
- pr_debug("evlist__mmap: %s\n",
- str_error_r(errno, sbuf, sizeof(sbuf)));
- goto out_delete_evlist;
- }
-
- evlist__enable(evlist);
- (*func)();
- evlist__disable(evlist);
-
- for (i = 0; i < evlist->core.nr_mmaps; i++) {
- union perf_event *event;
- struct mmap *md;
-
- md = &evlist->mmap[i];
- if (perf_mmap__read_init(&md->core) < 0)
- continue;
-
- while ((event = perf_mmap__read_event(&md->core)) != NULL) {
- const u32 type = event->header.type;
-
- if (type == PERF_RECORD_SAMPLE)
- count ++;
- }
- perf_mmap__read_done(&md->core);
- }
-
- if (count != expect * evlist->core.nr_entries) {
- pr_debug("BPF filter result incorrect, expected %d, got %d samples\n", expect * evlist->core.nr_entries, count);
- goto out_delete_evlist;
- }
-
- ret = TEST_OK;
-
-out_delete_evlist:
- evlist__delete(evlist);
- return ret;
-}
-
-static struct bpf_object *
-prepare_bpf(void *obj_buf, size_t obj_buf_sz, const char *name)
-{
- struct bpf_object *obj;
-
- obj = bpf__prepare_load_buffer(obj_buf, obj_buf_sz, name);
- if (IS_ERR(obj)) {
- pr_debug("Compile BPF program failed.\n");
- return NULL;
- }
- return obj;
-}
-
-static int __test__bpf(int idx)
-{
- int ret;
- void *obj_buf;
- size_t obj_buf_sz;
- struct bpf_object *obj;
-
- ret = test_llvm__fetch_bpf_obj(&obj_buf, &obj_buf_sz,
- bpf_testcase_table[idx].prog_id,
- false, NULL);
- if (ret != TEST_OK || !obj_buf || !obj_buf_sz) {
- pr_debug("Unable to get BPF object, %s\n",
- bpf_testcase_table[idx].msg_compile_fail);
- if ((idx == 0) || (ret == TEST_SKIP))
- return TEST_SKIP;
- else
- return TEST_FAIL;
- }
-
- obj = prepare_bpf(obj_buf, obj_buf_sz,
- bpf_testcase_table[idx].name);
- if ((!!bpf_testcase_table[idx].target_func) != (!!obj)) {
- if (!obj)
- pr_debug("Fail to load BPF object: %s\n",
- bpf_testcase_table[idx].msg_load_fail);
- else
- pr_debug("Success unexpectedly: %s\n",
- bpf_testcase_table[idx].msg_load_fail);
- ret = TEST_FAIL;
- goto out;
- }
-
- if (obj) {
- ret = do_test(obj,
- bpf_testcase_table[idx].target_func,
- bpf_testcase_table[idx].expect_result);
- if (ret != TEST_OK)
- goto out;
- if (bpf_testcase_table[idx].pin) {
- int err;
-
- if (!bpf_fs__mount()) {
- pr_debug("BPF filesystem not mounted\n");
- ret = TEST_FAIL;
- goto out;
- }
- err = mkdir(PERF_TEST_BPF_PATH, 0777);
- if (err && errno != EEXIST) {
- pr_debug("Failed to make perf_test dir: %s\n",
- strerror(errno));
- ret = TEST_FAIL;
- goto out;
- }
- if (bpf_object__pin(obj, PERF_TEST_BPF_PATH))
- ret = TEST_FAIL;
- if (rm_rf(PERF_TEST_BPF_PATH))
- ret = TEST_FAIL;
- }
- }
-
-out:
- free(obj_buf);
- bpf__clear();
- return ret;
-}
-
-static int check_env(void)
-{
- LIBBPF_OPTS(bpf_prog_load_opts, opts);
- int err;
- char license[] = "GPL";
-
- struct bpf_insn insns[] = {
- BPF_MOV64_IMM(BPF_REG_0, 1),
- BPF_EXIT_INSN(),
- };
-
- err = fetch_kernel_version(&opts.kern_version, NULL, 0);
- if (err) {
- pr_debug("Unable to get kernel version\n");
- return err;
- }
- err = bpf_prog_load(BPF_PROG_TYPE_KPROBE, NULL, license, insns,
- ARRAY_SIZE(insns), &opts);
- if (err < 0) {
- pr_err("Missing basic BPF support, skip this test: %s\n",
- strerror(errno));
- return err;
- }
- close(err);
-
- return 0;
-}
-
-static int test__bpf(int i)
-{
- int err;
-
- if (i < 0 || i >= (int)ARRAY_SIZE(bpf_testcase_table))
- return TEST_FAIL;
-
- if (geteuid() != 0) {
- pr_debug("Only root can run BPF test\n");
- return TEST_SKIP;
- }
-
- if (check_env())
- return TEST_SKIP;
-
- err = __test__bpf(i);
- return err;
-}
-#endif
-
-static int test__basic_bpf_test(struct test_suite *test __maybe_unused,
- int subtest __maybe_unused)
-{
-#if defined(HAVE_LIBBPF_SUPPORT) && defined(HAVE_LIBTRACEEVENT)
- return test__bpf(0);
-#else
- pr_debug("Skip BPF test because BPF or libtraceevent support is not compiled\n");
- return TEST_SKIP;
-#endif
-}
-
-static int test__bpf_pinning(struct test_suite *test __maybe_unused,
- int subtest __maybe_unused)
-{
-#if defined(HAVE_LIBBPF_SUPPORT) && defined(HAVE_LIBTRACEEVENT)
- return test__bpf(1);
-#else
- pr_debug("Skip BPF test because BPF or libtraceevent support is not compiled\n");
- return TEST_SKIP;
-#endif
-}
-
-static int test__bpf_prologue_test(struct test_suite *test __maybe_unused,
- int subtest __maybe_unused)
-{
-#if defined(HAVE_LIBBPF_SUPPORT) && defined(HAVE_BPF_PROLOGUE) && defined(HAVE_LIBTRACEEVENT)
- return test__bpf(2);
-#else
- pr_debug("Skip BPF test because BPF or libtraceevent support is not compiled\n");
- return TEST_SKIP;
-#endif
-}
-
-
-static struct test_case bpf_tests[] = {
-#if defined(HAVE_LIBBPF_SUPPORT) && defined(HAVE_LIBTRACEEVENT)
- TEST_CASE("Basic BPF filtering", basic_bpf_test),
- TEST_CASE_REASON("BPF pinning", bpf_pinning,
- "clang isn't installed or environment missing BPF support"),
-#ifdef HAVE_BPF_PROLOGUE
- TEST_CASE_REASON("BPF prologue generation", bpf_prologue_test,
- "clang/debuginfo isn't installed or environment missing BPF support"),
-#else
- TEST_CASE_REASON("BPF prologue generation", bpf_prologue_test, "not compiled in"),
-#endif
-#else
- TEST_CASE_REASON("Basic BPF filtering", basic_bpf_test, "not compiled in or missing libtraceevent support"),
- TEST_CASE_REASON("BPF pinning", bpf_pinning, "not compiled in or missing libtraceevent support"),
- TEST_CASE_REASON("BPF prologue generation", bpf_prologue_test, "not compiled in or missing libtraceevent support"),
-#endif
- { .name = NULL, }
-};
-
-struct test_suite suite__bpf = {
- .desc = "BPF filter",
- .test_cases = bpf_tests,
-};
generated by cgit v1.2.3-70-g09d2 (git 2.47.1) at 2025-01-08 18:38:08 +0000