v4.19.13 snapshot.
diff --git a/tools/perf/tests/builtin-test.c b/tools/perf/tests/builtin-test.c
new file mode 100644
index 0000000..d7a5e1b
--- /dev/null
+++ b/tools/perf/tests/builtin-test.c
@@ -0,0 +1,710 @@
+// 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 <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 <linux/kernel.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_signal_is_supported,
+ },
+ {
+ .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 mg",
+ .func = test__thread_mg_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 = "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,
+ },
+ {
+ .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;
+
+ description = fgets(description, size, fp);
+ fclose(fp);
+
+ return description ? trim(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);
+
+ return __cmd_test(argc, argv, skiplist);
+}