/*
 * builtin-test.c
 *
 * Builtin regression testing command: ever growing number of sanity tests
 */
#include "builtin.h"

#include "util/cache.h"
#include "util/debug.h"
#include "util/evlist.h"
#include "util/parse-options.h"
#include "util/parse-events.h"
#include "util/symbol.h"
#include "util/thread_map.h"
#include "../../include/linux/hw_breakpoint.h"

static long page_size;

static int vmlinux_matches_kallsyms_filter(struct map *map __used, struct symbol *sym)
{
        bool *visited = symbol__priv(sym);
        *visited = true;
        return 0;
}

static int test__vmlinux_matches_kallsyms(void)
{
        int err = -1;
        struct rb_node *nd;
        struct symbol *sym;
        struct map *kallsyms_map, *vmlinux_map;
        struct machine kallsyms, vmlinux;
        enum map_type type = MAP__FUNCTION;
        struct ref_reloc_sym ref_reloc_sym = { .name = "_stext", };

        /*
         * Step 1:
         *
         * Init the machines that will hold kernel, modules obtained from
         * both vmlinux + .ko files and from /proc/kallsyms split by modules.
         */
        machine__init(&kallsyms, "", HOST_KERNEL_ID);
        machine__init(&vmlinux, "", HOST_KERNEL_ID);

        /*
         * Step 2:
         *
         * Create the kernel maps for kallsyms and the DSO where we will then
         * load /proc/kallsyms. Also create the modules maps from /proc/modules
         * and find the .ko files that match them in /lib/modules/`uname -r`/.
         */
        if (machine__create_kernel_maps(&kallsyms) < 0) {
                pr_debug("machine__create_kernel_maps ");
                return -1;
        }

        /*
         * Step 3:
         *
         * Load and split /proc/kallsyms into multiple maps, one per module.
         */
        if (machine__load_kallsyms(&kallsyms, "/proc/kallsyms", type, NULL) <= 0) {
                pr_debug("dso__load_kallsyms ");
                goto out;
        }

        /*
         * Step 4:
         *
         * kallsyms will be internally on demand sorted by name so that we can
         * find the reference relocation * symbol, i.e. the symbol we will use
         * to see if the running kernel was relocated by checking if it has the
         * same value in the vmlinux file we load.
         */
        kallsyms_map = machine__kernel_map(&kallsyms, type);

        sym = map__find_symbol_by_name(kallsyms_map, ref_reloc_sym.name, NULL);
        if (sym == NULL) {
                pr_debug("dso__find_symbol_by_name ");
                goto out;
        }

        ref_reloc_sym.addr = sym->start;

        /*
         * Step 5:
         *
         * Now repeat step 2, this time for the vmlinux file we'll auto-locate.
         */
        if (machine__create_kernel_maps(&vmlinux) < 0) {
                pr_debug("machine__create_kernel_maps ");
                goto out;
        }

        vmlinux_map = machine__kernel_map(&vmlinux, type);
        map__kmap(vmlinux_map)->ref_reloc_sym = &ref_reloc_sym;

        /*
         * Step 6:
         *
         * Locate a vmlinux file in the vmlinux path that has a buildid that
         * matches the one of the running kernel.
         *
         * While doing that look if we find the ref reloc symbol, if we find it
         * we'll have its ref_reloc_symbol.unrelocated_addr and then
         * maps__reloc_vmlinux will notice and set proper ->[un]map_ip routines
         * to fixup the symbols.
         */
        if (machine__load_vmlinux_path(&vmlinux, type,
                                       vmlinux_matches_kallsyms_filter) <= 0) {
                pr_debug("machine__load_vmlinux_path ");
                goto out;
        }

        err = 0;
        /*
         * Step 7:
         *
         * Now look at the symbols in the vmlinux DSO and check if we find all of them
         * in the kallsyms dso. For the ones that are in both, check its names and
         * end addresses too.
         */
        for (nd = rb_first(&vmlinux_map->dso->symbols[type]); nd; nd = rb_next(nd)) {
                struct symbol *pair, *first_pair;
                bool backwards = true;

                sym  = rb_entry(nd, struct symbol, rb_node);

                if (sym->start == sym->end)
                        continue;

                first_pair = machine__find_kernel_symbol(&kallsyms, type, sym->start, NULL, NULL);
                pair = first_pair;

                if (pair && pair->start == sym->start) {
next_pair:
                        if (strcmp(sym->name, pair->name) == 0) {
                                /*
                                 * kallsyms don't have the symbol end, so we
                                 * set that by using the next symbol start - 1,
                                 * in some cases we get this up to a page
                                 * wrong, trace_kmalloc when I was developing
                                 * this code was one such example, 2106 bytes
                                 * off the real size. More than that and we
                                 * _really_ have a problem.
                                 */
                                s64 skew = sym->end - pair->end;
                                if (llabs(skew) < page_size)
                                        continue;

                                pr_debug("%#" PRIx64 ": diff end addr for %s v: %#" PRIx64 " k: %#" PRIx64 "\n",
                                         sym->start, sym->name, sym->end, pair->end);
                        } else {
                                struct rb_node *nnd;
detour:
                                nnd = backwards ? rb_prev(&pair->rb_node) :
                                                  rb_next(&pair->rb_node);
                                if (nnd) {
                                        struct symbol *next = rb_entry(nnd, struct symbol, rb_node);

                                        if (next->start == sym->start) {
                                                pair = next;
                                                goto next_pair;
                                        }
                                }

                                if (backwards) {
                                        backwards = false;
                                        pair = first_pair;
                                        goto detour;
                                }

                                pr_debug("%#" PRIx64 ": diff name v: %s k: %s\n",
                                         sym->start, sym->name, pair->name);
                        }
                } else
                        pr_debug("%#" PRIx64 ": %s not on kallsyms\n", sym->start, sym->name);

                err = -1;
        }

        if (!verbose)
                goto out;

        pr_info("Maps only in vmlinux:\n");

        for (nd = rb_first(&vmlinux.kmaps.maps[type]); nd; nd = rb_next(nd)) {
                struct map *pos = rb_entry(nd, struct map, rb_node), *pair;
                /*
                 * If it is the kernel, kallsyms is always "[kernel.kallsyms]", while
                 * the kernel will have the path for the vmlinux file being used,
                 * so use the short name, less descriptive but the same ("[kernel]" in
                 * both cases.
                 */
                pair = map_groups__find_by_name(&kallsyms.kmaps, type,
                                                (pos->dso->kernel ?
                                                        pos->dso->short_name :
                                                        pos->dso->name));
                if (pair)
                        pair->priv = 1;
                else
                        map__fprintf(pos, stderr);
        }

        pr_info("Maps in vmlinux with a different name in kallsyms:\n");

        for (nd = rb_first(&vmlinux.kmaps.maps[type]); nd; nd = rb_next(nd)) {
                struct map *pos = rb_entry(nd, struct map, rb_node), *pair;

                pair = map_groups__find(&kallsyms.kmaps, type, pos->start);
                if (pair == NULL || pair->priv)
                        continue;

                if (pair->start == pos->start) {
                        pair->priv = 1;
                        pr_info(" %" PRIx64 "-%" PRIx64 " %" PRIx64 " %s in kallsyms as",
                                pos->start, pos->end, pos->pgoff, pos->dso->name);
                        if (pos->pgoff != pair->pgoff || pos->end != pair->end)
                                pr_info(": \n*%" PRIx64 "-%" PRIx64 " %" PRIx64 "",
                                        pair->start, pair->end, pair->pgoff);
                        pr_info(" %s\n", pair->dso->name);
                        pair->priv = 1;
                }
        }

        pr_info("Maps only in kallsyms:\n");

        for (nd = rb_first(&kallsyms.kmaps.maps[type]);
             nd; nd = rb_next(nd)) {
                struct map *pos = rb_entry(nd, struct map, rb_node);

                if (!pos->priv)
                        map__fprintf(pos, stderr);
        }
out:
        return err;
}

#include "util/cpumap.h"
#include "util/evsel.h"
#include <sys/types.h>

static int trace_event__id(const char *evname)
{
        char *filename;
        int err = -1, fd;

        if (asprintf(&filename,
                     "%s/syscalls/%s/id",
                     debugfs_path, evname) < 0)
                return -1;

        fd = open(filename, O_RDONLY);
        if (fd >= 0) {
                char id[16];
                if (read(fd, id, sizeof(id)) > 0)
                        err = atoi(id);
                close(fd);
        }

        free(filename);
        return err;
}

static int test__open_syscall_event(void)
{
        int err = -1, fd;
        struct thread_map *threads;
        struct perf_evsel *evsel;
        struct perf_event_attr attr;
        unsigned int nr_open_calls = 111, i;
        int id = trace_event__id("sys_enter_open");

        if (id < 0) {
                pr_debug("is debugfs mounted on /sys/kernel/debug?\n");
                return -1;
        }

        threads = thread_map__new(-1, getpid());
        if (threads == NULL) {
                pr_debug("thread_map__new\n");
                return -1;
        }

        memset(&attr, 0, sizeof(attr));
        attr.type = PERF_TYPE_TRACEPOINT;
        attr.config = id;
        evsel = perf_evsel__new(&attr, 0);
        if (evsel == NULL) {
                pr_debug("perf_evsel__new\n");
                goto out_thread_map_delete;
        }

        if (perf_evsel__open_per_thread(evsel, threads, false, NULL) < 0) {
                pr_debug("failed to open counter: %s, "
                         "tweak /proc/sys/kernel/perf_event_paranoid?\n",
                         strerror(errno));
                goto out_evsel_delete;
        }

        for (i = 0; i < nr_open_calls; ++i) {
                fd = open("/etc/passwd", O_RDONLY);
                close(fd);
        }

        if (perf_evsel__read_on_cpu(evsel, 0, 0) < 0) {
                pr_debug("perf_evsel__read_on_cpu\n");
                goto out_close_fd;
        }

        if (evsel->counts->cpu[0].val != nr_open_calls) {
                pr_debug("perf_evsel__read_on_cpu: expected to intercept %d calls, got %" PRIu64 "\n",
                         nr_open_calls, evsel->counts->cpu[0].val);
                goto out_close_fd;
        }
        
        err = 0;
out_close_fd:
        perf_evsel__close_fd(evsel, 1, threads->nr);
out_evsel_delete:
        perf_evsel__delete(evsel);
out_thread_map_delete:
        thread_map__delete(threads);
        return err;
}

#include <sched.h>

static int test__open_syscall_event_on_all_cpus(void)
{
        int err = -1, fd, cpu;
        struct thread_map *threads;
        struct cpu_map *cpus;
        struct perf_evsel *evsel;
        struct perf_event_attr attr;
        unsigned int nr_open_calls = 111, i;
        cpu_set_t cpu_set;
        int id = trace_event__id("sys_enter_open");

        if (id < 0) {
                pr_debug("is debugfs mounted on /sys/kernel/debug?\n");
                return -1;
        }

        threads = thread_map__new(-1, getpid());
        if (threads == NULL) {
                pr_debug("thread_map__new\n");
                return -1;
        }

        cpus = cpu_map__new(NULL);
        if (cpus == NULL) {
                pr_debug("cpu_map__new\n");
                goto out_thread_map_delete;
        }


        CPU_ZERO(&cpu_set);

        memset(&attr, 0, sizeof(attr));
        attr.type = PERF_TYPE_TRACEPOINT;
        attr.config = id;
        evsel = perf_evsel__new(&attr, 0);
        if (evsel == NULL) {
                pr_debug("perf_evsel__new\n");
                goto out_thread_map_delete;
        }

        if (perf_evsel__open(evsel, cpus, threads, false, NULL) < 0) {
                pr_debug("failed to open counter: %s, "
                         "tweak /proc/sys/kernel/perf_event_paranoid?\n",
                         strerror(errno));
                goto out_evsel_delete;
        }

        for (cpu = 0; cpu < cpus->nr; ++cpu) {
                unsigned int ncalls = nr_open_calls + cpu;
                /*
                 * XXX eventually lift this restriction in a way that
                 * keeps perf building on older glibc installations
                 * without CPU_ALLOC. 1024 cpus in 2010 still seems
                 * a reasonable upper limit tho :-)
                 */
                if (cpus->map[cpu] >= CPU_SETSIZE) {
                        pr_debug("Ignoring CPU %d\n", cpus->map[cpu]);
                        continue;
                }

                CPU_SET(cpus->map[cpu], &cpu_set);
                if (sched_setaffinity(0, sizeof(cpu_set), &cpu_set) < 0) {
                        pr_debug("sched_setaffinity() failed on CPU %d: %s ",
                                 cpus->map[cpu],
                                 strerror(errno));
                        goto out_close_fd;
                }
                for (i = 0; i < ncalls; ++i) {
                        fd = open("/etc/passwd", O_RDONLY);
                        close(fd);
                }
                CPU_CLR(cpus->map[cpu], &cpu_set);
        }

        /*
         * Here we need to explicitely preallocate the counts, as if
         * we use the auto allocation it will allocate just for 1 cpu,
         * as we start by cpu 0.
         */
        if (perf_evsel__alloc_counts(evsel, cpus->nr) < 0) {
                pr_debug("perf_evsel__alloc_counts(ncpus=%d)\n", cpus->nr);
                goto out_close_fd;
        }

        err = 0;

        for (cpu = 0; cpu < cpus->nr; ++cpu) {
                unsigned int expected;

                if (cpus->map[cpu] >= CPU_SETSIZE)
                        continue;

                if (perf_evsel__read_on_cpu(evsel, cpu, 0) < 0) {
                        pr_debug("perf_evsel__read_on_cpu\n");
                        err = -1;
                        break;
                }

                expected = nr_open_calls + cpu;
                if (evsel->counts->cpu[cpu].val != expected) {
                        pr_debug("perf_evsel__read_on_cpu: expected to intercept %d calls on cpu %d, got %" PRIu64 "\n",
                                 expected, cpus->map[cpu], evsel->counts->cpu[cpu].val);
                        err = -1;
                }
        }

out_close_fd:
        perf_evsel__close_fd(evsel, 1, threads->nr);
out_evsel_delete:
        perf_evsel__delete(evsel);
out_thread_map_delete:
        thread_map__delete(threads);
        return err;
}

/*
 * This test will generate random numbers of calls to some getpid syscalls,
 * then establish an mmap for a group of events that are created to monitor
 * the syscalls.
 *
 * It will receive the events, using mmap, use its PERF_SAMPLE_ID generated
 * sample.id field to map back to its respective perf_evsel instance.
 *
 * Then it checks if the number of syscalls reported as perf events by
 * the kernel corresponds to the number of syscalls made.
 */
static int test__basic_mmap(void)
{
        int err = -1;
        union perf_event *event;
        struct thread_map *threads;
        struct cpu_map *cpus;
        struct perf_evlist *evlist;
        struct perf_event_attr attr = {
                .type           = PERF_TYPE_TRACEPOINT,
                .read_format    = PERF_FORMAT_ID,
                .sample_type    = PERF_SAMPLE_ID,
                .watermark      = 0,
        };
        cpu_set_t cpu_set;
        const char *syscall_names[] = { "getsid", "getppid", "getpgrp",
                                        "getpgid", };
        pid_t (*syscalls[])(void) = { (void *)getsid, getppid, getpgrp,
                                      (void*)getpgid };
#define nsyscalls ARRAY_SIZE(syscall_names)
        int ids[nsyscalls];
        unsigned int nr_events[nsyscalls],
                     expected_nr_events[nsyscalls], i, j;
        struct perf_evsel *evsels[nsyscalls], *evsel;
        int sample_size = __perf_evsel__sample_size(attr.sample_type);

        for (i = 0; i < nsyscalls; ++i) {
                char name[64];

                snprintf(name, sizeof(name), "sys_enter_%s", syscall_names[i]);
                ids[i] = trace_event__id(name);
                if (ids[i] < 0) {
                        pr_debug("Is debugfs mounted on /sys/kernel/debug?\n");
                        return -1;
                }
                nr_events[i] = 0;
                expected_nr_events[i] = random() % 257;
        }

        threads = thread_map__new(-1, getpid());
        if (threads == NULL) {
                pr_debug("thread_map__new\n");
                return -1;
        }

        cpus = cpu_map__new(NULL);
        if (cpus == NULL) {
                pr_debug("cpu_map__new\n");
                goto out_free_threads;
        }

        CPU_ZERO(&cpu_set);
        CPU_SET(cpus->map[0], &cpu_set);
        sched_setaffinity(0, sizeof(cpu_set), &cpu_set);
        if (sched_setaffinity(0, sizeof(cpu_set), &cpu_set) < 0) {
                pr_debug("sched_setaffinity() failed on CPU %d: %s ",
                         cpus->map[0], strerror(errno));
                goto out_free_cpus;
        }

        evlist = perf_evlist__new(cpus, threads);
        if (evlist == NULL) {
                pr_debug("perf_evlist__new\n");
                goto out_free_cpus;
        }

        /* anonymous union fields, can't be initialized above */
        attr.wakeup_events = 1;
        attr.sample_period = 1;

        for (i = 0; i < nsyscalls; ++i) {
                attr.config = ids[i];
                evsels[i] = perf_evsel__new(&attr, i);
                if (evsels[i] == NULL) {
                        pr_debug("perf_evsel__new\n");
                        goto out_free_evlist;
                }

                perf_evlist__add(evlist, evsels[i]);

                if (perf_evsel__open(evsels[i], cpus, threads, false, NULL) < 0) {
                        pr_debug("failed to open counter: %s, "
                                 "tweak /proc/sys/kernel/perf_event_paranoid?\n",
                                 strerror(errno));
                        goto out_close_fd;
                }
        }

        if (perf_evlist__mmap(evlist, 128, true) < 0) {
                pr_debug("failed to mmap events: %d (%s)\n", errno,
                         strerror(errno));
                goto out_close_fd;
        }

        for (i = 0; i < nsyscalls; ++i)
                for (j = 0; j < expected_nr_events[i]; ++j) {
                        int foo = syscalls[i]();
                        ++foo;
                }

        while ((event = perf_evlist__mmap_read(evlist, 0)) != NULL) {
                struct perf_sample sample;

                if (event->header.type != PERF_RECORD_SAMPLE) {
                        pr_debug("unexpected %s event\n",
                                 perf_event__name(event->header.type));
                        goto out_munmap;
                }

                err = perf_event__parse_sample(event, attr.sample_type, sample_size,
                                               false, &sample, false);
                if (err) {
                        pr_err("Can't parse sample, err = %d\n", err);
                        goto out_munmap;
                }

                evsel = perf_evlist__id2evsel(evlist, sample.id);
                if (evsel == NULL) {
                        pr_debug("event with id %" PRIu64
                                 " doesn't map to an evsel\n", sample.id);
                        goto out_munmap;
                }
                nr_events[evsel->idx]++;
        }

        list_for_each_entry(evsel, &evlist->entries, node) {
                if (nr_events[evsel->idx] != expected_nr_events[evsel->idx]) {
                        pr_debug("expected %d %s events, got %d\n",
                                 expected_nr_events[evsel->idx],
                                 event_name(evsel), nr_events[evsel->idx]);
                        goto out_munmap;
                }
        }

        err = 0;
out_munmap:
        perf_evlist__munmap(evlist);
out_close_fd:
        for (i = 0; i < nsyscalls; ++i)
                perf_evsel__close_fd(evsels[i], 1, threads->nr);
out_free_evlist:
        perf_evlist__delete(evlist);
out_free_cpus:
        cpu_map__delete(cpus);
out_free_threads:
        thread_map__delete(threads);
        return err;
#undef nsyscalls
}

#define TEST_ASSERT_VAL(text, cond) \
do { \
        if (!cond) { \
                pr_debug("FAILED %s:%d %s\n", __FILE__, __LINE__, text); \
                return -1; \
        } \
} while (0)

static int test__checkevent_tracepoint(struct perf_evlist *evlist)
{
        struct perf_evsel *evsel = list_entry(evlist->entries.next,
                                              struct perf_evsel, node);

        TEST_ASSERT_VAL("wrong number of entries", 1 == evlist->nr_entries);
        TEST_ASSERT_VAL("wrong type", PERF_TYPE_TRACEPOINT == evsel->attr.type);
        TEST_ASSERT_VAL("wrong sample_type",
                (PERF_SAMPLE_RAW | PERF_SAMPLE_TIME | PERF_SAMPLE_CPU) ==
                evsel->attr.sample_type);
        TEST_ASSERT_VAL("wrong sample_period", 1 == evsel->attr.sample_period);
        return 0;
}

static int test__checkevent_tracepoint_multi(struct perf_evlist *evlist)
{
        struct perf_evsel *evsel;

        TEST_ASSERT_VAL("wrong number of entries", evlist->nr_entries > 1);

        list_for_each_entry(evsel, &evlist->entries, node) {
                TEST_ASSERT_VAL("wrong type",
                        PERF_TYPE_TRACEPOINT == evsel->attr.type);
                TEST_ASSERT_VAL("wrong sample_type",
                        (PERF_SAMPLE_RAW | PERF_SAMPLE_TIME | PERF_SAMPLE_CPU)
                        == evsel->attr.sample_type);
                TEST_ASSERT_VAL("wrong sample_period",
                        1 == evsel->attr.sample_period);
        }
        return 0;
}

static int test__checkevent_raw(struct perf_evlist *evlist)
{
        struct perf_evsel *evsel = list_entry(evlist->entries.next,
                                              struct perf_evsel, node);

        TEST_ASSERT_VAL("wrong number of entries", 1 == evlist->nr_entries);
        TEST_ASSERT_VAL("wrong type", PERF_TYPE_RAW == evsel->attr.type);
        TEST_ASSERT_VAL("wrong config", 1 == evsel->attr.config);
        return 0;
}

static int test__checkevent_numeric(struct perf_evlist *evlist)
{
        struct perf_evsel *evsel = list_entry(evlist->entries.next,
                                              struct perf_evsel, node);

        TEST_ASSERT_VAL("wrong number of entries", 1 == evlist->nr_entries);
        TEST_ASSERT_VAL("wrong type", 1 == evsel->attr.type);
        TEST_ASSERT_VAL("wrong config", 1 == evsel->attr.config);
        return 0;
}

static int test__checkevent_symbolic_name(struct perf_evlist *evlist)
{
        struct perf_evsel *evsel = list_entry(evlist->entries.next,
                                              struct perf_evsel, node);

        TEST_ASSERT_VAL("wrong number of entries", 1 == evlist->nr_entries);
        TEST_ASSERT_VAL("wrong type", PERF_TYPE_HARDWARE == evsel->attr.type);
        TEST_ASSERT_VAL("wrong config",
                        PERF_COUNT_HW_INSTRUCTIONS == evsel->attr.config);
        return 0;
}

static int test__checkevent_symbolic_alias(struct perf_evlist *evlist)
{
        struct perf_evsel *evsel = list_entry(evlist->entries.next,
                                              struct perf_evsel, node);

        TEST_ASSERT_VAL("wrong number of entries", 1 == evlist->nr_entries);
        TEST_ASSERT_VAL("wrong type", PERF_TYPE_SOFTWARE == evsel->attr.type);
        TEST_ASSERT_VAL("wrong config",
                        PERF_COUNT_SW_PAGE_FAULTS == evsel->attr.config);
        return 0;
}

static int test__checkevent_genhw(struct perf_evlist *evlist)
{
        struct perf_evsel *evsel = list_entry(evlist->entries.next,
                                              struct perf_evsel, node);

        TEST_ASSERT_VAL("wrong number of entries", 1 == evlist->nr_entries);
        TEST_ASSERT_VAL("wrong type", PERF_TYPE_HW_CACHE == evsel->attr.type);
        TEST_ASSERT_VAL("wrong config", (1 << 16) == evsel->attr.config);
        return 0;
}

static int test__checkevent_breakpoint(struct perf_evlist *evlist)
{
        struct perf_evsel *evsel = list_entry(evlist->entries.next,
                                              struct perf_evsel, node);

        TEST_ASSERT_VAL("wrong number of entries", 1 == evlist->nr_entries);
        TEST_ASSERT_VAL("wrong type", PERF_TYPE_BREAKPOINT == evsel->attr.type);
        TEST_ASSERT_VAL("wrong config", 0 == evsel->attr.config);
        TEST_ASSERT_VAL("wrong bp_type", (HW_BREAKPOINT_R | HW_BREAKPOINT_W) ==
                                         evsel->attr.bp_type);
        TEST_ASSERT_VAL("wrong bp_len", HW_BREAKPOINT_LEN_4 ==
                                        evsel->attr.bp_len);
        return 0;
}

static int test__checkevent_breakpoint_x(struct perf_evlist *evlist)
{
        struct perf_evsel *evsel = list_entry(evlist->entries.next,
                                              struct perf_evsel, node);

        TEST_ASSERT_VAL("wrong number of entries", 1 == evlist->nr_entries);
        TEST_ASSERT_VAL("wrong type", PERF_TYPE_BREAKPOINT == evsel->attr.type);
        TEST_ASSERT_VAL("wrong config", 0 == evsel->attr.config);
        TEST_ASSERT_VAL("wrong bp_type",
                        HW_BREAKPOINT_X == evsel->attr.bp_type);
        TEST_ASSERT_VAL("wrong bp_len", sizeof(long) == evsel->attr.bp_len);
        return 0;
}

static int test__checkevent_breakpoint_r(struct perf_evlist *evlist)
{
        struct perf_evsel *evsel = list_entry(evlist->entries.next,
                                              struct perf_evsel, node);

        TEST_ASSERT_VAL("wrong number of entries", 1 == evlist->nr_entries);
        TEST_ASSERT_VAL("wrong type",
                        PERF_TYPE_BREAKPOINT == evsel->attr.type);
        TEST_ASSERT_VAL("wrong config", 0 == evsel->attr.config);
        TEST_ASSERT_VAL("wrong bp_type",
                        HW_BREAKPOINT_R == evsel->attr.bp_type);
        TEST_ASSERT_VAL("wrong bp_len",
                        HW_BREAKPOINT_LEN_4 == evsel->attr.bp_len);
        return 0;
}

static int test__checkevent_breakpoint_w(struct perf_evlist *evlist)
{
        struct perf_evsel *evsel = list_entry(evlist->entries.next,
                                              struct perf_evsel, node);

        TEST_ASSERT_VAL("wrong number of entries", 1 == evlist->nr_entries);
        TEST_ASSERT_VAL("wrong type",
                        PERF_TYPE_BREAKPOINT == evsel->attr.type);
        TEST_ASSERT_VAL("wrong config", 0 == evsel->attr.config);
        TEST_ASSERT_VAL("wrong bp_type",
                        HW_BREAKPOINT_W == evsel->attr.bp_type);
        TEST_ASSERT_VAL("wrong bp_len",
                        HW_BREAKPOINT_LEN_4 == evsel->attr.bp_len);
        return 0;
}

static struct test__event_st {
        const char *name;
        __u32 type;
        int (*check)(struct perf_evlist *evlist);
} test__events[] = {
        {
                .name  = "syscalls:sys_enter_open",
                .check = test__checkevent_tracepoint,
        },
        {
                .name  = "syscalls:*",
                .check = test__checkevent_tracepoint_multi,
        },
        {
                .name  = "r1",
                .check = test__checkevent_raw,
        },
        {
                .name  = "1:1",
                .check = test__checkevent_numeric,
        },
        {
                .name  = "instructions",
                .check = test__checkevent_symbolic_name,
        },
        {
                .name  = "faults",
                .check = test__checkevent_symbolic_alias,
        },
        {
                .name  = "L1-dcache-load-miss",
                .check = test__checkevent_genhw,
        },
        {
                .name  = "mem:0",
                .check = test__checkevent_breakpoint,
        },
        {
                .name  = "mem:0:x",
                .check = test__checkevent_breakpoint_x,
        },
        {
                .name  = "mem:0:r",
                .check = test__checkevent_breakpoint_r,
        },
        {
                .name  = "mem:0:w",
                .check = test__checkevent_breakpoint_w,
        },
};

#define TEST__EVENTS_CNT (sizeof(test__events) / sizeof(struct test__event_st))

static int test__parse_events(void)
{
        struct perf_evlist *evlist;
        u_int i;
        int ret = 0;

        for (i = 0; i < TEST__EVENTS_CNT; i++) {
                struct test__event_st *e = &test__events[i];

                evlist = perf_evlist__new(NULL, NULL);
                if (evlist == NULL)
                        break;

                ret = parse_events(evlist, e->name, 0);
                if (ret) {
                        pr_debug("failed to parse event '%s', err %d\n",
                                 e->name, ret);
                        break;
                }

                ret = e->check(evlist);
                if (ret)
                        break;

                perf_evlist__delete(evlist);
        }

        return ret;
}
static struct test {
        const char *desc;
        int (*func)(void);
} tests[] = {
        {
                .desc = "vmlinux symtab matches kallsyms",
                .func = test__vmlinux_matches_kallsyms,
        },
        {
                .desc = "detect open syscall event",
                .func = test__open_syscall_event,
        },
        {
                .desc = "detect open syscall event on all cpus",
                .func = test__open_syscall_event_on_all_cpus,
        },
        {
                .desc = "read samples using the mmap interface",
                .func = test__basic_mmap,
        },
        {
                .desc = "parse events tests",
                .func = test__parse_events,
        },
        {
                .func = NULL,
        },
};

static int __cmd_test(void)
{
        int i = 0;

        page_size = sysconf(_SC_PAGE_SIZE);

        while (tests[i].func) {
                int err;
                pr_info("%2d: %s:", i + 1, tests[i].desc);
                pr_debug("\n--- start ---\n");
                err = tests[i].func();
                pr_debug("---- end ----\n%s:", tests[i].desc);
                pr_info(" %s\n", err ? "FAILED!\n" : "Ok");
                ++i;
        }

        return 0;
}

static const char * const test_usage[] = {
        "perf test [<options>]",
        NULL,
};

static const struct option test_options[] = {
        OPT_INTEGER('v', "verbose", &verbose,
                    "be more verbose (show symbol address, etc)"),
        OPT_END()
};

int cmd_test(int argc, const char **argv, const char *prefix __used)
{
        argc = parse_options(argc, argv, test_options, test_usage, 0);
        if (argc)
                usage_with_options(test_usage, test_options);

        symbol_conf.priv_size = sizeof(int);
        symbol_conf.sort_by_name = true;
        symbol_conf.try_vmlinux_path = true;

        if (symbol__init() < 0)
                return -1;

        setup_pager();

        return __cmd_test();
}