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|
// SPDX-License-Identifier: GPL-2.0
/*
* builtin-test.c
*
* Builtin regression testing command: ever growing number of sanity tests
*/
#include <fcntl.h>
#include <errno.h>
#include <unistd.h>
#include <string.h>
#include <stdlib.h>
#include <sys/types.h>
#include <dirent.h>
#include <sys/wait.h>
#include <sys/stat.h>
#include "builtin.h"
#include "hist.h"
#include "intlist.h"
#include "tests.h"
#include "debug.h"
#include "color.h"
#include <subcmd/parse-options.h>
#include "string2.h"
#include "symbol.h"
#include "util/rlimit.h"
#include <linux/kernel.h>
#include <linux/string.h>
#include <subcmd/exec-cmd.h>
static bool dont_fork;
struct test __weak arch_tests[] = {
{
.func = NULL,
},
};
static struct test generic_tests[] = {
{
.desc = "vmlinux symtab matches kallsyms",
.func = test__vmlinux_matches_kallsyms,
},
{
.desc = "Detect openat syscall event",
.func = test__openat_syscall_event,
},
{
.desc = "Detect openat syscall event on all cpus",
.func = test__openat_syscall_event_on_all_cpus,
},
{
.desc = "Read samples using the mmap interface",
.func = test__basic_mmap,
},
{
.desc = "Test data source output",
.func = test__mem,
},
{
.desc = "Parse event definition strings",
.func = test__parse_events,
},
{
.desc = "Simple expression parser",
.func = test__expr,
},
{
.desc = "PERF_RECORD_* events & perf_sample fields",
.func = test__PERF_RECORD,
},
{
.desc = "Parse perf pmu format",
.func = test__pmu,
},
{
.desc = "DSO data read",
.func = test__dso_data,
},
{
.desc = "DSO data cache",
.func = test__dso_data_cache,
},
{
.desc = "DSO data reopen",
.func = test__dso_data_reopen,
},
{
.desc = "Roundtrip evsel->name",
.func = test__perf_evsel__roundtrip_name_test,
},
{
.desc = "Parse sched tracepoints fields",
.func = test__perf_evsel__tp_sched_test,
},
{
.desc = "syscalls:sys_enter_openat event fields",
.func = test__syscall_openat_tp_fields,
},
{
.desc = "Setup struct perf_event_attr",
.func = test__attr,
},
{
.desc = "Match and link multiple hists",
.func = test__hists_link,
},
{
.desc = "'import perf' in python",
.func = test__python_use,
},
{
.desc = "Breakpoint overflow signal handler",
.func = test__bp_signal,
.is_supported = test__bp_signal_is_supported,
},
{
.desc = "Breakpoint overflow sampling",
.func = test__bp_signal_overflow,
.is_supported = test__bp_signal_is_supported,
},
{
.desc = "Breakpoint accounting",
.func = test__bp_accounting,
.is_supported = test__bp_account_is_supported,
},
{
.desc = "Watchpoint",
.func = test__wp,
.is_supported = test__wp_is_supported,
.subtest = {
.skip_if_fail = false,
.get_nr = test__wp_subtest_get_nr,
.get_desc = test__wp_subtest_get_desc,
},
},
{
.desc = "Number of exit events of a simple workload",
.func = test__task_exit,
},
{
.desc = "Software clock events period values",
.func = test__sw_clock_freq,
},
{
.desc = "Object code reading",
.func = test__code_reading,
},
{
.desc = "Sample parsing",
.func = test__sample_parsing,
},
{
.desc = "Use a dummy software event to keep tracking",
.func = test__keep_tracking,
},
{
.desc = "Parse with no sample_id_all bit set",
.func = test__parse_no_sample_id_all,
},
{
.desc = "Filter hist entries",
.func = test__hists_filter,
},
{
.desc = "Lookup mmap thread",
.func = test__mmap_thread_lookup,
},
{
.desc = "Share thread maps",
.func = test__thread_maps_share,
},
{
.desc = "Sort output of hist entries",
.func = test__hists_output,
},
{
.desc = "Cumulate child hist entries",
.func = test__hists_cumulate,
},
{
.desc = "Track with sched_switch",
.func = test__switch_tracking,
},
{
.desc = "Filter fds with revents mask in a fdarray",
.func = test__fdarray__filter,
},
{
.desc = "Add fd to a fdarray, making it autogrow",
.func = test__fdarray__add,
},
{
.desc = "kmod_path__parse",
.func = test__kmod_path__parse,
},
{
.desc = "Thread map",
.func = test__thread_map,
},
{
.desc = "LLVM search and compile",
.func = test__llvm,
.subtest = {
.skip_if_fail = true,
.get_nr = test__llvm_subtest_get_nr,
.get_desc = test__llvm_subtest_get_desc,
},
},
{
.desc = "Session topology",
.func = test__session_topology,
},
{
.desc = "BPF filter",
.func = test__bpf,
.subtest = {
.skip_if_fail = true,
.get_nr = test__bpf_subtest_get_nr,
.get_desc = test__bpf_subtest_get_desc,
},
},
{
.desc = "Synthesize thread map",
.func = test__thread_map_synthesize,
},
{
.desc = "Remove thread map",
.func = test__thread_map_remove,
},
{
.desc = "Synthesize cpu map",
.func = test__cpu_map_synthesize,
},
{
.desc = "Synthesize stat config",
.func = test__synthesize_stat_config,
},
{
.desc = "Synthesize stat",
.func = test__synthesize_stat,
},
{
.desc = "Synthesize stat round",
.func = test__synthesize_stat_round,
},
{
.desc = "Synthesize attr update",
.func = test__event_update,
},
{
.desc = "Event times",
.func = test__event_times,
},
{
.desc = "Read backward ring buffer",
.func = test__backward_ring_buffer,
},
{
.desc = "Print cpu map",
.func = test__cpu_map_print,
},
{
.desc = "Merge cpu map",
.func = test__cpu_map_merge,
},
{
.desc = "Probe SDT events",
.func = test__sdt_event,
},
{
.desc = "is_printable_array",
.func = test__is_printable_array,
},
{
.desc = "Print bitmap",
.func = test__bitmap_print,
},
{
.desc = "perf hooks",
.func = test__perf_hooks,
},
{
.desc = "builtin clang support",
.func = test__clang,
.subtest = {
.skip_if_fail = true,
.get_nr = test__clang_subtest_get_nr,
.get_desc = test__clang_subtest_get_desc,
}
},
{
.desc = "unit_number__scnprintf",
.func = test__unit_number__scnprint,
},
{
.desc = "mem2node",
.func = test__mem2node,
},
{
.desc = "time utils",
.func = test__time_utils,
},
{
.desc = "Test jit_write_elf",
.func = test__jit_write_elf,
},
{
.desc = "maps__merge_in",
.func = test__maps__merge_in,
},
{
.func = NULL,
},
};
static struct test *tests[] = {
generic_tests,
arch_tests,
};
static bool perf_test__matches(struct test *test, int curr, int argc, const char *argv[])
{
int i;
if (argc == 0)
return true;
for (i = 0; i < argc; ++i) {
char *end;
long nr = strtoul(argv[i], &end, 10);
if (*end == '\0') {
if (nr == curr + 1)
return true;
continue;
}
if (strcasestr(test->desc, argv[i]))
return true;
}
return false;
}
static int run_test(struct test *test, int subtest)
{
int status, err = -1, child = dont_fork ? 0 : fork();
char sbuf[STRERR_BUFSIZE];
if (child < 0) {
pr_err("failed to fork test: %s\n",
str_error_r(errno, sbuf, sizeof(sbuf)));
return -1;
}
if (!child) {
if (!dont_fork) {
pr_debug("test child forked, pid %d\n", getpid());
if (verbose <= 0) {
int nullfd = open("/dev/null", O_WRONLY);
if (nullfd >= 0) {
close(STDERR_FILENO);
close(STDOUT_FILENO);
dup2(nullfd, STDOUT_FILENO);
dup2(STDOUT_FILENO, STDERR_FILENO);
close(nullfd);
}
} else {
signal(SIGSEGV, sighandler_dump_stack);
signal(SIGFPE, sighandler_dump_stack);
}
}
err = test->func(test, subtest);
if (!dont_fork)
exit(err);
}
if (!dont_fork) {
wait(&status);
if (WIFEXITED(status)) {
err = (signed char)WEXITSTATUS(status);
pr_debug("test child finished with %d\n", err);
} else if (WIFSIGNALED(status)) {
err = -1;
pr_debug("test child interrupted\n");
}
}
return err;
}
#define for_each_test(j, t) \
for (j = 0; j < ARRAY_SIZE(tests); j++) \
for (t = &tests[j][0]; t->func; t++)
static int test_and_print(struct test *t, bool force_skip, int subtest)
{
int err;
if (!force_skip) {
pr_debug("\n--- start ---\n");
err = run_test(t, subtest);
pr_debug("---- end ----\n");
} else {
pr_debug("\n--- force skipped ---\n");
err = TEST_SKIP;
}
if (!t->subtest.get_nr)
pr_debug("%s:", t->desc);
else
pr_debug("%s subtest %d:", t->desc, subtest + 1);
switch (err) {
case TEST_OK:
pr_info(" Ok\n");
break;
case TEST_SKIP:
color_fprintf(stderr, PERF_COLOR_YELLOW, " Skip\n");
break;
case TEST_FAIL:
default:
color_fprintf(stderr, PERF_COLOR_RED, " FAILED!\n");
break;
}
return err;
}
static const char *shell_test__description(char *description, size_t size,
const char *path, const char *name)
{
FILE *fp;
char filename[PATH_MAX];
path__join(filename, sizeof(filename), path, name);
fp = fopen(filename, "r");
if (!fp)
return NULL;
/* Skip shebang */
while (fgetc(fp) != '\n');
description = fgets(description, size, fp);
fclose(fp);
return description ? strim(description + 1) : NULL;
}
#define for_each_shell_test(dir, base, ent) \
while ((ent = readdir(dir)) != NULL) \
if (!is_directory(base, ent) && ent->d_name[0] != '.')
static const char *shell_tests__dir(char *path, size_t size)
{
const char *devel_dirs[] = { "./tools/perf/tests", "./tests", };
char *exec_path;
unsigned int i;
for (i = 0; i < ARRAY_SIZE(devel_dirs); ++i) {
struct stat st;
if (!lstat(devel_dirs[i], &st)) {
scnprintf(path, size, "%s/shell", devel_dirs[i]);
if (!lstat(devel_dirs[i], &st))
return path;
}
}
/* Then installed path. */
exec_path = get_argv_exec_path();
scnprintf(path, size, "%s/tests/shell", exec_path);
free(exec_path);
return path;
}
static int shell_tests__max_desc_width(void)
{
DIR *dir;
struct dirent *ent;
char path_dir[PATH_MAX];
const char *path = shell_tests__dir(path_dir, sizeof(path_dir));
int width = 0;
if (path == NULL)
return -1;
dir = opendir(path);
if (!dir)
return -1;
for_each_shell_test(dir, path, ent) {
char bf[256];
const char *desc = shell_test__description(bf, sizeof(bf), path, ent->d_name);
if (desc) {
int len = strlen(desc);
if (width < len)
width = len;
}
}
closedir(dir);
return width;
}
struct shell_test {
const char *dir;
const char *file;
};
static int shell_test__run(struct test *test, int subdir __maybe_unused)
{
int err;
char script[PATH_MAX];
struct shell_test *st = test->priv;
path__join(script, sizeof(script), st->dir, st->file);
err = system(script);
if (!err)
return TEST_OK;
return WEXITSTATUS(err) == 2 ? TEST_SKIP : TEST_FAIL;
}
static int run_shell_tests(int argc, const char *argv[], int i, int width)
{
DIR *dir;
struct dirent *ent;
char path_dir[PATH_MAX];
struct shell_test st = {
.dir = shell_tests__dir(path_dir, sizeof(path_dir)),
};
if (st.dir == NULL)
return -1;
dir = opendir(st.dir);
if (!dir)
return -1;
for_each_shell_test(dir, st.dir, ent) {
int curr = i++;
char desc[256];
struct test test = {
.desc = shell_test__description(desc, sizeof(desc), st.dir, ent->d_name),
.func = shell_test__run,
.priv = &st,
};
if (!perf_test__matches(&test, curr, argc, argv))
continue;
st.file = ent->d_name;
pr_info("%2d: %-*s:", i, width, test.desc);
test_and_print(&test, false, -1);
}
closedir(dir);
return 0;
}
static int __cmd_test(int argc, const char *argv[], struct intlist *skiplist)
{
struct test *t;
unsigned int j;
int i = 0;
int width = shell_tests__max_desc_width();
for_each_test(j, t) {
int len = strlen(t->desc);
if (width < len)
width = len;
}
for_each_test(j, t) {
int curr = i++, err;
if (!perf_test__matches(t, curr, argc, argv))
continue;
if (t->is_supported && !t->is_supported()) {
pr_debug("%2d: %-*s: Disabled\n", i, width, t->desc);
continue;
}
pr_info("%2d: %-*s:", i, width, t->desc);
if (intlist__find(skiplist, i)) {
color_fprintf(stderr, PERF_COLOR_YELLOW, " Skip (user override)\n");
continue;
}
if (!t->subtest.get_nr) {
test_and_print(t, false, -1);
} else {
int subn = t->subtest.get_nr();
/*
* minus 2 to align with normal testcases.
* For subtest we print additional '.x' in number.
* for example:
*
* 35: Test LLVM searching and compiling :
* 35.1: Basic BPF llvm compiling test : Ok
*/
int subw = width > 2 ? width - 2 : width;
bool skip = false;
int subi;
if (subn <= 0) {
color_fprintf(stderr, PERF_COLOR_YELLOW,
" Skip (not compiled in)\n");
continue;
}
pr_info("\n");
for (subi = 0; subi < subn; subi++) {
int len = strlen(t->subtest.get_desc(subi));
if (subw < len)
subw = len;
}
for (subi = 0; subi < subn; subi++) {
pr_info("%2d.%1d: %-*s:", i, subi + 1, subw,
t->subtest.get_desc(subi));
err = test_and_print(t, skip, subi);
if (err != TEST_OK && t->subtest.skip_if_fail)
skip = true;
}
}
}
return run_shell_tests(argc, argv, i, width);
}
static int perf_test__list_shell(int argc, const char **argv, int i)
{
DIR *dir;
struct dirent *ent;
char path_dir[PATH_MAX];
const char *path = shell_tests__dir(path_dir, sizeof(path_dir));
if (path == NULL)
return -1;
dir = opendir(path);
if (!dir)
return -1;
for_each_shell_test(dir, path, ent) {
int curr = i++;
char bf[256];
struct test t = {
.desc = shell_test__description(bf, sizeof(bf), path, ent->d_name),
};
if (!perf_test__matches(&t, curr, argc, argv))
continue;
pr_info("%2d: %s\n", i, t.desc);
}
closedir(dir);
return 0;
}
static int perf_test__list(int argc, const char **argv)
{
unsigned int j;
struct test *t;
int i = 0;
for_each_test(j, t) {
int curr = i++;
if (!perf_test__matches(t, curr, argc, argv) ||
(t->is_supported && !t->is_supported()))
continue;
pr_info("%2d: %s\n", i, t->desc);
if (t->subtest.get_nr) {
int subn = t->subtest.get_nr();
int subi;
for (subi = 0; subi < subn; subi++)
pr_info("%2d:%1d: %s\n", i, subi + 1,
t->subtest.get_desc(subi));
}
}
perf_test__list_shell(argc, argv, i);
return 0;
}
int cmd_test(int argc, const char **argv)
{
const char *test_usage[] = {
"perf test [<options>] [{list <test-name-fragment>|[<test-name-fragments>|<test-numbers>]}]",
NULL,
};
const char *skip = NULL;
const struct option test_options[] = {
OPT_STRING('s', "skip", &skip, "tests", "tests to skip"),
OPT_INCR('v', "verbose", &verbose,
"be more verbose (show symbol address, etc)"),
OPT_BOOLEAN('F', "dont-fork", &dont_fork,
"Do not fork for testcase"),
OPT_END()
};
const char * const test_subcommands[] = { "list", NULL };
struct intlist *skiplist = NULL;
int ret = hists__init();
if (ret < 0)
return ret;
argc = parse_options_subcommand(argc, argv, test_options, test_subcommands, test_usage, 0);
if (argc >= 1 && !strcmp(argv[0], "list"))
return perf_test__list(argc - 1, argv + 1);
symbol_conf.priv_size = sizeof(int);
symbol_conf.sort_by_name = true;
symbol_conf.try_vmlinux_path = true;
if (symbol__init(NULL) < 0)
return -1;
if (skip != NULL)
skiplist = intlist__new(skip);
/*
* Tests that create BPF maps, for instance, need more than the 64K
* default:
*/
rlimit__bump_memlock();
return __cmd_test(argc, argv, skiplist);
}
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